The Iron Age 1914-05-14: Vol 93 Iss 20

MTCC LCCC LCC } ! \ nin UPDURPODEELULEEUTE DER EOLE EDUARDO EUOEEDEREEORERELE NEE SEUPELELALEUA TREE DEAT AUU ORR CETERA CTE , wnt . ; Established 1855 New York. 14. May 1914 The of with Zinc in the Plant of the National Coating Electrical Metal Molding Company, Economy, Pa. Although the process of Sherardizing, or dr ising point of either galvanizing, is being widely used in the rust parallel in established proofing of steel and iron products with zinc, few save, perhaps, in thi Sherardized materials are familiar with esses users 1 discovery, as the formation of the zinc-iron allo obtained in it occurs at a temperature below the manner sin for electr« in a ticles or Drums into Furr Fig. 1 Loading 1189 Conduits lar to that used for hot Vol. 93: No. 20 The Sherardizing Process Illustrated + metal, a feature having pnenomena, i s Bauer-Barff or Wells pro the process or methods employed in its application A clear idea of the manner in w h Sherar This is in part due to the fact that Sherardizing, ng is carried out may be obtained the illust: unlike either electro or hot galvanizing, was tions accompanying tl rticle, taken in the pla developed by successive steps over a period of years the National Metal Molding Company, at Ec but was discovered during experiments with an im omy, Pa. This company em} the Sherardiziz proved process of annealing castings, by Sherard process in protecting elect ndu and fitting Cowper Cowles, a well-known English engineer, and _ which it manufactures named for him—Sherardizing. It is doubtful The tube from which this company’ nduit the process would be in use today save for some such made is first cleaned by acid pickling and scouring preparing ar galvanized coatings It i ne Bie oy a es 1190 THE IRON AGE 1O7 1914 Through Funnels Drums g. 2—Chuting Dust into Sherardizing then loaded into large drums into which zinc dust is discharged through funnels into and around it, in the manner shown in Fig. 2, until the drums are filled. The dust is obtained from the hoods of zinc smelters, upon which it is formed by the condensation of zinc vapors, and it is not ground ommercial zinc, has erroneously stated. The dust usually contains about 85 per cent. pure zine and 10 per cent. of zine oxide, which latter is not in a free state, and, being evenly distributed throughout the mass, prevents the dust from be- coming pasty at the high temperature required for Sherardizing. After loading, the drums are sealed and rolled nto the Sherardizing furnace, as shown in Fig. 1. Here they remain for 5 to 6 hr., according to the tonnage that they contain, in an evenly maintained used been as Fig. 3—Drums Cooling Out Zine Dust Is Rocker Fig. 4—How the Surplus Shaken Out temperature of 780 deg. F. Many theories have been advanced as to the probable action incident to the formation of the Sherardized zinc-iron alloy during the period the drums remain in the furnace. These theories, however, do not check up in some details, and the only point on which investigators are entirely agreed is in the conclusion that articles properly prepared, buried in zinc-dust of the char acter used and maintained at a certain temperature for a correct period of time are provided with a homogeneous zinc-iron alloyed finish of high effi ciency. Upon removal from the Sherardizing furnace the drums are rolled out on the cooling platform, as shown in Fig. 3, and allowed to cool out, as it 1s called, for 12 to 16 hr. before they are unsealed, as the introduction of oxygen to the zine while in a iy aes: Tie) | i aT Furnace After Removal from 1914 THE IRON AGE 1191 ted state would, of course, destroy it. The ¢ incident to the slow heating and slower through which articles pass in the process Sherardizing doubly valuable as a finish for ducts which, like electrical conduits, must luring installation, and for many cast-iron which would otherwise require a separate , for the purpose. r “cooling out” the contents of the drums ned into large hoppers, as shown in Fig. 4, surplus zine dust rocked out, leaving, in ad- o the zinc-iron alloy, an exterior coating of United States patents covering the process of 3} rdizing are owned by the United States Sher- ¢ Company, New Castle, Pa. AN ELECTRIC TUNNEL CRANE A Double-End 100-Ton Self-Propelling Unit De- signed for Underground Work he Industrial Works, Bay City, Mich., has de- signed and built a 100-ton tunnel crane for use in accidents or wrecks within the electric n of the New York Central & Hudson River The Wrecking Crane Which the New York Centra ‘road. It is a double-end electric wrecking crane vith independent 100-ton capacity cranes at each ‘nd and the whole apparatus was especially de- signed for the underground clearances and condi- ons existing in the Grand Central Terminal, at New York City. While designed primarily to meet ‘he conditions existing at that point, the crane is so adapted for use on the main line, and may be ‘ispatched at high speed under its own power to the scene of an accident occurring anywhere on the elec division. , ‘he functions of a crane are combined with those of a high-power electric locomotive, equipment provides for high-speed inde- operation and includes airbrakes, whistles me the necessary fittings. In the restricted space ’* the express level deck of the Terminal, the ca- pacity of the crane must be available under condi- where headroom for raising the boom and ‘ the side for slewing are both restricted, and concentration of wheel loads must also be In case of a wreck occuring in the terminal djacent tunnel, it is planned to lift the rior al wreckage clear of the track and have the crane back out with the load. If, however, this cannot be done, by reason of the lack of headroom or the size of the piece, one end will be raised with the main hoist and a special truck placed underneath it with the auxiliary hoist, after which the load would be dragged away. The crane is massive. long, with a wheelbase of 51 ft. operated, telescopic outriggers or jack beams, which are used to add stability during heavy lifting and to distribute the load over a greater area, is fur- nished. Valves with lever control regulate the move- ment of these outriggers, and the operation is said to be instantaneous. A complete, independent crane, with a mast and boom of structural shapes, is located at each end of the car Four 200-hp. motors are used for propelling the crane, controlled from either end of the car Two 150-hp. motors are employed for hoisting and for operating the machinery. The propelling mo tors are directly connected to the axles of the com pound trucks, two at each end of the car, and are arranged so that all four may be used for travel ing or only the two at either end, if that is de sired. With all four propelling motors in use, the The car body is 67 ft. A system of air crane may be used to haul an 80-ton rolling load at a speed of 25 miles per hr. on straight level tracks, or 12 miles when an additional load of 50 tons is suspended from the crane. The motors are designed to operate on a direct-current circuit, where the line voltage varies between 300 and 750 volts. For intermittent and emergency service, as when the third rail is out of commission, or it is impossible to make cable connections with a feed line, a storage battery is installed on the crane The annual report of the Steel Company of Canada, Hamilton, Ont., shows that the 12 months ended De cember 31, 1913, were the most prosperous it has eve had. An analysis of figures indicated that the new Canadian tariff would tend to benefit the company. The following officers and directors were elected: President. Cc. S. Wilcox: vice-president, +e E Burge: vice-president and general manager, Robert Hobson; secretary-treas urer, H. H. Champ. Directors, Charles Alexander, Providence, R. I.; W. D. Matthews, Toronto; John Milne and William Southam, Hamilton, Ont.; Edmund Osler, Toronto: F. H. Whitton, William Gibson and Llovd Harris, Brantford, Ont A Modern Steel Construction Shop Plant of the Riter-Conley Mfg. Company, Equipped for Building Plate Work in Variety as Well as Nearly fifty years ago, James Riter started a small shop at 56 Water street, Pittsburgh, to do a general plate and tank business, and from this small beginning has grown the present large plant of the Riter-Conley Mfg. Company, which is now located at Leetsdale on the Pittsburgh, Fort Wayne & Chicago railroad, about 15 miles from Pittsburgh. By a recent addition of two large bays to its ex- tensive plant, the Riter-Conley Company now has the distinction of having the largest fabricating shop in this country combining plate and gen- eral structural work. The initial business in Pitts- burgh was carried on for a few years by James Riter and was taken over by Thomas B. Riter, a brother. It was largely through his efforts that the General Map of the Plant of the enviable reputation of this firm was established, first as Riter & Conley, later as the Riter-Conley Company, and about 12 years ago was made a corporation under the name of the Riter-Conley Mfg. Company. From its inception the bufiness grew rapidly, necessitating larger quarters, and these were se- cured by the building of additional shops on Ferry street in Pittsburgh. Later a structural shop was established on Preble avenue, N. S., Pittsburgh, and finally a plot of 70 acres was secured at Leetsdale. Upon this tract the plant and general offices of the company are now located, the Pittsburgh and North Side properties having been disposed of and the entire works removed to Leetsdale. The advantage of the present location is its proximity to the Conway freight yards of the Pennsylvania Lines General Structural Work West, where through trains for both the | West are made up, and plenty of cars ar: available. The Pennsylvania Railroad ha: tensive system of tracks connecting with lines into the works, and the Riter-Conley | has its own switching equipment. A fron 1400 ft. on the Ohio River affords excellent facilities by water. The present plant except the office, power house and galvanizing department, is all under one roof and covers an area of 360,000 sq. ft. The plant js divided into six bays, ranging from 77 ft. 3 in. to 85 ft. 6 in. in width, and are known as shops | to 6 inclusive. They are lighted by abundant window space in the walls and roof, which make artificial light unnecessary. The building extends north- east by southwest, the receiving yard being |o- cated at the northeast end, the shipping vard at the southwest end. The general layout is such that work progresses through the shop in ; straight line. The receiving departments « yards are equipped with a number of locomotive cranes, and in the shops are installed 16 travel- ing cranes that do the main transporting about the shops and a number of small cranes that serve the various machines. All the power is electric, the current being generated in the com- pany’s power house by gas engines using na ural gas, and a remarkable feature of the plant is t and sually an ex- main mpany age of pping Riter- Conley Mfg. Company, Leetsdale, Pa. that there is no coal used except in the blacksmith fires. Shop No. 1, covering an area of 77 x 635 ft, takes up one bay of the main building. This in conjunction with No. 2 shop, 85 x 638 ft., is de voted mainly to blast furnace, tank, pipe work and miscellaneous plate fabrication. The tool equipme?' is very complete. The material enters at the north end, passes first through the shearing and punching machines from which it goes to the assembling and riveting floors. A long rack punch with automatic feed for punching holes on each side of a plate will handle plates 32 ft. long. This machine, designed by the Riter-Conley Company, may be set to punch holes at any predetermined distance apart. multiple punch is provided for punching ends tank and pipe plate, this machine having a sapeel 1192 . 1914 THE IRON AGE 1193 ‘% t 2 Horizontal l Vertical Re F » hing at one stroke 100 holes %4 in. in rivet pipe 30 ft. long and 7 ft. in diameter, with in 44-in. plates 8 ft. wide. continuous butt strap assembled complete. Some of re is a combination multiple punch and _ the tank work is welded, and for this purpose there Long & Alstatter bulldozer for bending bars is provided two heavy oxy-acetylene welding de es, and a Long & Alstatter center punch vices, one furnished by the Linde Air Product A special machine provides for scarfing Company and the other designed by the Riter-Conley ; For bending plates a set of 21-ft. Mfg. Company. ntal bending rolls is installed, and a set of The company makes many of its own rivets and ‘ rolls can take care of plates 8 ft. in length rivet making machines are installed in an annex 3 n. in thickness. A Niles-Bement-Pond to No. 1 shop. The cold header machines wer ’ aner is installed in this department, and is furnished by the Waterbury Farrel Foundry & : the largest ever built. This machine is Machine Company and have a capacity of 30 rivet Y from to 1“ In. In hrough a large spur gear reduction by a_ per minute for sizes ranging notor. The pipe bending rolls have a ca diameter. A smaller machine has a capacity of 60 3 eee bending pipe 90 in. in diameter. The plate rivets per minute for sizes under in. in diameter ‘9 department in No. 1 shop contains six radia The raw material for the rivet shop fii f th 6-ft. arms, three being of the Bickford through the pickling and washing solutions and ther i = three built by Prentice Brothers. The to the draw bench where it is drawn to exact ie ent also includes the usual array of heavy size before cold heading. The raw material rang ta‘ eters. The largest of these is designed to in size from ', to 1% in. in diameter and is reduced i s a a ts , iia dip Nie os Bi. <a ete aa R= Lm gt mi od 4 wt ea aga Se mi oy ere = eerierer hay apie Ponereestee ms a Pee aman Ty tad Shops Nos. 1 and 2, Plate Department 1194 THE IRON AGE Pe iT] eee) Lee The No. 1/32 in. by drawing. This department also con- tains bolt heading machines and a rotary gas heated annealing furnace for rivets and bolts with a ca- pacity of 8 tons per day. A good deal of fine plate work turned out by the ompany is cold riveted, for which purpose powerful machines are required. The company has designed ts own cold machines. The operator simply pulls a lever which releases a plunger that ipsets the head of the rivet. The machines are so designed that when a predetermined pressure has been reached a release and the plunger moves back. ; driven with the unequal strains avoided. riveting valve is opened Therefore each rivet and Same pressure are The machine shop the northeast ends of No. 2 and No. 3 shops and has some very efficient tools, embracing 15 lathes, 5 planing machines, 6 milling machines, 1 planer-type milling machine, 2 occupies ) Shops Nos 4 Shop hydraulic bending rolls, 2 vertical boring machines 4 cylindrical grinding machines, 3 surface grinding machines, 5 radial drilling presses, besidé ber of other small tools. In shop No. 3, covering an area of about 85 x 638 ft., is located the forge shop, which contains a large amount of machine tool equipment, hydraulic presses, forging hammers, annealing ovens, et There are four steam hammers, two of 6000 II capacity, two of 2000 lb. capacity, an Ajax header, a Billings & Spencer drop hammer, and a large trimming press built by the United Engineering & Foundry Company. The steam hammers are oper- ated by compressed air. A notable piece of equip- ment is a hydraulic press of 5000 tons capacity de- signed by the Riter-Conley Mfg. Company and built by the Bethlehem Steel Company. The Riter-Conle) Company makes a large number of steel cores for concrete piles. The plates for these cores are 5 and 6, Structural Department THE IRON AGE 1195 A 40-Ft. Planing Machins the Gas Holder Dep inder this press. The gas fired annealing The use of copper steel in gas holder construction ; of such size that it will take riveted pipe has proved a very effective agent in withstanding 30 ft. long and 8 ft. in diameter. There is corrosive action 100-ton Chambersburg Engineering Company The equipment in the gas holder department plate heating furnace, 15 x 20 ft. in size, necessarily includes machines designed for heavy { heating furnaces for drop forge and general plate fabrication. This plate work has to be very vork. exact, the material being worked down to the one he No. 4 shop, 8545 x 616 ft., is devoted ex hundredth part of an inch There are installed to the building of gas holders of which 11 drilling machines of various makes with 5-ft. Conley Mfg. Company makes a specialty. radials and a 40-ft. plate edge planer of Riter ny first took up this work in 1896. About Conley design and two hydraulic presses, one of . water gas had come into extensive use and 600 tons capacity and one of 1000 tons capacity. Y period red lead was used exclusively for There are also two vertical and one horizontal cen- ght work. As it was found that the o ter punching machines, one multiple punch, one gate i ras attacked the red lead causing all the shear for shearing light holder shapes and two rack 7 leak badly, the Riter-Conley Company de punches with a capacity of handling plates 20 ft .% on erecting gas holders with metal t n width. nts caulked in the same manner as ordinary Shops Nos. 5 and 6 are of recent construction, nd similar construction, to make tight work. each being about 85 x 572 ft., and are devoted solely i eh 2 Oe a a a a Wom : The Galvanizing Department - Fa 1196 to structural work. Suitable equipment for heavy bridge and building fabrication has been installed. They contain a Long & Alstatter gang punch for punching columns and girder work, two punches for bars and angles, one set of straightening rolls for straightening columns and girder plates and two vertical center punches. There is a very large vertical center punch for punching plates which is equipped with a ball-bear- ing caster table, so the plates can be handled to best advantage. There is also a gang of 4 drill presses, 9 column reamers, 3 rivet gantries electrically oper- ated, 2 rotary compressors, 1 end shear, and a cold saw with a capacity for cutting 30 in. beams. Other equipment consists of an angle shear, center punch for punching angles, one gang of 4 center punches especially designed for punching tower angles, 3 combination shear punches, 1 coping ma- chine, a large rotary planer, bulldozer, and 2 sta- tionary riveters. A large number of transmission towers are fabricated in the structural department. In order to handle this work expeditiously, a battery of 4 motor-driven punches, mounted on an adjust- able rack, has been provided. The borings and punchings are collected in steel boxes which are handled by the traveling cranes. The boxes are 3 ft. wide, 4 ft. long and 3 ft. deep. A scrap pit is located at the southeast corner of the plant, in which the borings and punchings are accumulated, and then from time to time as the larger boxes are filled they are lifted by a locomo- tive crane and dumped into a gondola car. The galvanizing plant is housed in a separate building 71 x 176 ft. just north of the main build- ing indicated on the accompanying general plan of the works. It is used largely for providing a pro- tective coating for transmission towers. It is fur- nished with ample equipment including suitable cranes, one pot, three pickling tanks, one wash tank Center Punch with Roller Table, Structural Department and one drying table. material per day. All the power throughout the plant is electric, shops Nos. 1 to 4 being run by alternating current and Nos. 5 and 6 by direct current. The power plant is contained in a fireproof building 48 ft. wide by 324 ft. long. It includes some of the largest natural gas units now in service for generating elec- tric power, four 200-kw. three-phase Westinghouse vertical direct-connected natural-gas units.and four 175-kw. direct-current Westinghouse belted units. A synchronous motor generator set is installed to balance the loads between the direct current and alternating current equipment. The air equipment Its capacity is 30 tons of THE IRON AGE Ma) 1914 consists of one Snow pump with a capaci livering 2200 cu. ft. of free air per minut: engines belted to compressors, two with of 750 ft. of free air per minute, and « capacity of 800 ft. of free air per minut is installed one electrically driven water a gas driven Wilson-Snyder pump, wh the water from the Ohio River whic! throughout the entire plant. The Riter-Conley Mfg. Company in its plant was not unmindful of the con conveniences of its employees. The comp: special effort to keep the grounds in as attractiy; a condition as possible. The main office, ich j a 4-story brick and steel structure, is surr: ed by flower beds and carefully kept lawns. Facing nort} and between the shops and the Fort Wa road there is a very large piece of ground on whic! a base ball diamond is laid out, also two tennis courts, quoit grounds and putting greens. They facilities for recreation are placed at the disposa of all of the employees of the company. The va- cant space north of No. 6 shop, which has been left to provide for future expansion, is now occupied by a garden supplying vegetables used in the com- pany’s dining room. The company maintains a re- lief department, taking care of all injured em- ployees without any charge, and the men who are off duty on account of injuries are paid half time. The company also maintains a hospital for taking prompt care of its men in case of accident. A notable feature of the plant is that all gas, air and water lines in each of the six shops in the main building are laid in trenches, constructed of brick walls with a steel plate covering, and serve as general walks throughout the shops, and no materials of any kind are allowed to be piled a these plates. The plant of the Riter-Conley Mfg. Company is one of the best equipped and largest works in the world for fabricating miscellaneous plate and struc- tural work. It has been conspicuous in the building of blast furnaces and in addition to gas works | plete, it builds and launches river boats, constructs electrical transmission towers, makes the largest plate girders for railways or viaducts, manufactures cold storage plants and complete steel plants and applies steel plates and shapes to every required ust Special emphasis is placed on turning out complete industrial plants from the designs to placing t! plant in operation. A Mechanical Type Elevator Controller A new mechanical type of elevator controller fo! use with polyphase alternating-current motors Nas been designed by the Cutler-Hammer Mfg. Con pany, Milwaukee, Wis. This controller, which 1s 40 addition to the line of alternating-current automa! and semi-automatic elevator controllers now mac is intended particularly for use in factories, !ndu* trial plants, etc., where alternating-current power » purchased from a central station, and there 1s 1 electrician or engineer available to make adus ments. The controller has no electromagnets ° sliding contacts and is arranged to be operated fro" the car by a rope or lever. It is emphasized that the controller operates satisfactorily on circuits where there is a wide fluctuation in the supply voltage. Two sets of three single-pole switches ©" equipped with arcing shields, control the primar circuit. Each of these sets is operated by a spec’ internal cam, which is relied upon to give an abs lute knock out to the switches when opening and #" absolute lock out for the second set, when the ®' nin. Three triple-pole cam-operated switches secondary resistance out of the circuit. As as the primary switches are thrown in, a clutch released which permits a weight to drop, the mo eing retarded by a suction dashpot. This n turn drives a shaft on which the cams art for controlling the secondary switches ndary resistance is cut out simultaneous three phases of the rotor circuit, which, it 1 out, gives a balanced condition at all times he primary switches are opened, the sec resistance is again inserted in the circuit, ere is a latching attachment to prevent th: er from being operated accidentally if the mechanism is not thrown to the central ‘he contacts in the controller are the roughout, which simplifies the renewal of subjected to wear. A wide range of ad- provided for the contacts, which tends maximum life. An accurate indication of ons of the controller handle is furnished hed star wheel. dge Mfg. Company has opened Sout! ales and engineering offices at Dallas, a distinct sales and engineering office at ds, Mich. J. H. Drapier, of the general lent, Mishawaka, has been made manage1 addition and Oscar W. Gregg, late of Pulley Company, representative at Grar short thime ago the company opened a Indianapolis in charge of E. M. nd warehouses are maintained at Chicag‘ Boston, Pittsburgh, Philadelphia, Cinci! lis, Minneapolis and Portland. Carve! Dorn & Dutton Company, Cleveland, Ohio, t to further its interests in the far West, in the electric traction field, it has estab- h offices in Los Angeles and San Francisco er point the office is located at 1007 Nort! eet, and in San Francisco at 515 Mission harge of the Los Angeles office is H. E hile the San Francisco office is in charge of mn, district sales manager. tr i brothers Company, Bridgeport, Conn., THE IRON AGE L197 A New Silent Tilting Tumbling Barrel the engineering department of the Warner has placed the market a machine known as the silent tilting imbling barrel. It is designed for polishing and rgings or castings, and ding small stampings, rolling of plated stampings, urhieh | . ‘ ‘ byeae \ hich latter process is fast replacing hand burnish The machine is driven by a single pulley, which is a nternal expanding triction clutch his lutch is operated Db a lever cated close to the iting crank that control aarrel, thus giving e operator ( he mechanism the arrel from one working position. The power ransmitted through a case-hardened steel worn 1d a cast-iron gear running in an oil bath, which relied upon to insure s t running rhe moving parts are inclosed in dust ght housings, and th nstruction with the resulting elimination of du nd grit in conjunction with the silent running nds to reduce the wear to a minimum. The barre self-oiling throughout lhe barrel can be tilted to run at al angle etween the position shown in the accompanying ngraving and one at an angle of 180 deg. fron { A slight pull of the crank handle disengages the pawl, and a moderate effort of one hand tilts the arrel. When the handle is released the paw! auto emphasized that in from a flying falling tub spill its contents on atically locks itself, and this way no accident « result handle, nor can a } tne oor. No gears are exposed, and the workman protected against accident The load of the barrel is carried by a ball thrust bearing l'wo types of barrel are furnished. A cast-iror or brass barrel of polygon shape is substituted for a steel one in grinding and polishing stamping forgings or castings. Maple barrels are used for plated stampings and barrel are made, the wet or dry rolling of milar work. Three _ ‘ having inside diameters of 28, 32 and 36 in. at the bottom, and 23, 27 and 30 in. at the top The length barrels are 26, 28 and 30 in. The barrel g the smallest dimensions onsidered the tandat ze by the maker The American Metal Company, Ltd. (Metallurgical Company of America). has removed its offices to 61 ae ex t M - Two Remodeled Blast-Furnace Plant: How Changes Were Made at the Etna and Ironton Plants of the Marting Iron & Stee! Company, Ironton, Ohio The Marting Iron & Steel Company, Ironton, Ohio, has installed a simple and inexpensive stock charging installation at two of its plants in [ronton. The Etna plant comprised two alternate stacks with a connecting platform leading to a double vertical hoist. These stacks, as originally built by English engineers, had vertical shells of very light iron. It was decided to eliminate the alternate principle on which they were operated and reconstruct one of the stacks on modern lines. With this in view, one of the stacks was equipped in 1910 with a new shell of 3%-in. steel plate, the other stack being left as originally built. To equip the modern stack with a skip, it was necessary to lay off the center line of the skip bridge at 10 deg. with the center line of the furnace New Skip Hoist at Etna Plant, and New Ti in order to clear the hot blast stove located be- tween furnace stack and stock house. The old wooden trestles, three in number, extended in a di- rection parallel to the center line of the two stacks. A new double track trestle with stock bins was con- structed in line with the old wooden trestles and between them and the furnace, running through the old stock house, which was removed to accommo- date them. This arrangement contemplated run- ning the center line of skip bridge and skip pit at 10 deg. with a line square with the center of the new trestle and bins. For reclaiming the ore so far as possible di- rectly from the old trestles, the new trestle was constructed within working distance for a locomo- tive crane from the first old trestle. The ore track on the new trestle adjoins the first old trestle. On this ore track the transfer car operates. With the aid of the locomotive crane this car, therefore, commands all the reserve ore under the t of the new trestle, all the ore under the trestle adjoining the new trestle and , 50 per cent. of all the ore under the s trestle. The ore under the third old tr the remaining 50 per cent. of the ore second old trestle can be loaded into the car by handling twice with the locomot or by loading directly into hopper cars fr trestles and switching these cars over the At the Etna plant, the new alternate s{ available for immediate installation of complete ay tomatic filling devices, and it was planned that th: older stack would be maintained in blast during part of the reconstruction period. At the [ronto; plant the plan was to keep the furnace in blast eo) estle, Showing One of the Suspension Type Bins tinuously throughout the entire construction perio and only add to the previously existing layout, trestles and bins to be used in connection with hand filling. This left the installation of a complet automatic filling apparatus until a later date whe! the furnace would be available for such installa- tion. The ore yard at the Ironton plant is in man respects similar to that at the Etna plant, and th same bin filling scheme was adhered to. Howeve! the future skip will be constructed on the cente! line of the furnace at right angles to the nev trestle, this arrangement contemplating the '® moval of the present vertical hoist. EQUIPMENT AT ETNA PLANT A steel trestle construction of variable hight was provided with an overall distance including ™ bins of 510 ft. The hight of the trestle measure above the stockhouse floor level at the abutment 1198 23.58 ft. at the first bent of the coke bin to the abutment, the grade between the ntioned being 4.2 per cent. Beginning at ent of the ore bin farthest from the abut- hight of trestle tracks at top of rail is ap- , 26 ft., and at the extreme end of trestle iding a grade of 11% percent. This grade intained over the stock bins. ore and stone bins of the Baker sus- pe, of an average capacity of 110 tons ore each, were provided. The center to ensions for bins are 12 ft., and average 5 ft., as measured from yard level to top rails. The approximate average width as | at the top of the bins and at right angles nter line of track is 20 ft. The Baker type nstruction as adapted to this installation trated and described in The Iron Age of 23. 1913. Some of the details of construc- here shown. The bins deliver through t gates into a scale car running the entire * bins, which in turn delivers into the skip ites at the skip pit between the scale car A double discharge coke bin 60 ft. long, spanning tracks of steel trestle and having an aver- ’ geht of approximately 24 ft., was provided. The bin was constructed with sloping bottom sides, nverging to two oppositely located discharge doors provided with chutes and gates, the location of the hutes being such that materials may be discharged lirectly into skip cars. The bin is supported by four steel bents which also support the railroad tracks. One electrically operated 60,000-lb. transfer car, the general construction of which is given in an accompanying drawing, was furnished. This car s of the McKee type, but departures over the old style were incorporated. The old method of flared opper was changed to flat hexagonal shaped sides. The tripping of the hinged discharge doors is ac- omplished by means of lever and bell crank, lo- ated on the center line of the hopper, which in turn re actuated by means of a system of shafting and evel gears leading to a hand wheel shown in a vertical position in the operator’s cab. Due to the fact that this car will at times have to be operated ver a 444 per cent. grade, it was necessary to pro- de two high-power low-speed motors to operate Two Westinghouse commutating pole mine type tors of 43 hp. and running at 300 r.p.m. were installed. To increase the tractive effort further ‘t ? “6-i1 wheels were used on the two sets of standard M.C.B. trucks. Collector shoes attached to the r gather power from two 20-lb. T-rail conductors, riinn + ing the entire length of the trestle on the ore track Or transfer car side. The car is of steel tion throughout. lectrically operated scale car of the McKee rd design, and having a hopper capacity of nately 80 cu. ft. was provided. This car is n two pairs of axles and is provided with tinghouse series-wound 220-volt 25-hp. di- ent crane-type motor, including control consisting of one drum controller with The hopper of car is supported by a pivotally mounted beams connected to a pe beam-box containing scale beams of apacity to enable separate weighing of s materials entering into the furnace bur- car was provided with hand-operated ghted bottom discharge door and also perated band brakes. Power is collected r by means of two short trolley poles nection with trolley wires hung in a box 1914 THE IRON AGE 1199 running underneath the bins. The car is of steel construction throughout. One 15-ton steam-operated locomotive crane special design of the Brown Hoisting Machiner; Company was furnished. This crane was provided with a 24 cu. ft. standard Brown grab bucket The furnace was equipped with one double-track structural steel skip bridge of the through type construction, rigidly supported at its base and hav ing a pin connecting support at the furnace plat- form. This bridge has an overall dimension of 160 ft. and a width of 13 ft. center to center of out- side girders. The skip pit at the lower end is of concrete, having a front sloping side which is of the same inclination angle as the skip bridge and which forms a support for ties carrying rails con- tinuous with those on the skil bridge. This pit is of sufficient depth below the skip cars to be filled vr ~y —_ ' } We eeeeeed iT ir aod i Rage pg gems oi tj : | T tii ie ++ ij 5 t+ + +4 4+ 4 et tae 4 at A | SaS8' Sy we ey ny / / / 1A 4 ut ‘ i either from the coke bins on each side of pit or from scale car traek hoppers located over the pit The stock is delivered from the skip bridge to a McKee distributor which is actuated by a 10-hp series-wound Westinghouse motor and automatically controlled by top and bottom limit switches and electric controller of the six-station six-skips per station type. As auxiliary parts there were fur- nished a new top plate ring riveted to the old top ring, a new gas seal; bell beams operated by 10-in. and 14-in. steam cylinders for the small and large bells, respectively; structural steel gallows frame, top platform, ete. A hand-operated jib crane was furnished for handling the above parts to the fur- nace platform. The old hopper and large bell were re-installed. Self dumping 110 cu. ft. skip cars are used, controlled by a 14 x 14-in. double-drum steam- operated Otis hoisting engine in a brick and stee! engine house underneath the skip bridge. An electric power plant for furnishing light and power requirements was installed in a lean-to to the existing blowing engine house. The equipment in- “fy en: emer _ [nae eR . ae oye lems oe ET ea ee owt - = . To i Pe eee ae : —_ “at ae i i a Ee ee 1200 cludes a Westinghouse turbo-generator unit com- bining a 110-hp. horizontal non-condensing turbine direct connected to a 75-kw. 250-volt Westinghouse generator. THE IRONTON IRON COMPANY PLANT The improvements at the Ironton [ron Company plant of the Marting Iron & Steel Company were more limited in scope than at the Etna plant, but in making plans for this equipment, provision was made for possible later installations. At this time only trestles, bins, locomotive crane and transfer car were installed. ' The plant was equipped with a bin system prac- tically the duplicate in capacity of the Etna fur- nace installation. The arrangement of the bins was altered somewhat to make a shorter haul for the ore and limestone. The double dis- charge coke bin was located in the cen- ter of the bin system and on the cen- ter line through furnace. The coke Plan and Elevation of a 60,000-Ib. Electrically Operated Transfer Car THE IRON AGE May 1914 bin was built for discharge into skip installed later, but was arranged with toms and temporary quadrant gates to ena mno. rary filling into hand-operated coke bug; 7} trestle construction, including both ; double tracks, totals 620 lin. ft. The hig! measured to the top of the rail is app 12 ft. at the abutment and 23 ft. 6 in. vent of the ore bin adjacent to the abu the grade of tracks between the points is approximately 3.3 per cent. Beginn end bent of the ore and stone bins furt the abutment, the hight of the trestle tra o the top of the rail is approximately 26 ft. . and at the extreme end of the trestle app: 30 ft., providing a grade of trestle app: 1!» per cent. Eleven ore and stone bins of the Bak sion type were provided in connection [ronton installation. One electrically oper Kee transfer car and a 15-ton Brown crane and grab bucket, a duplicate of the crane for the Etna plant, were provided. Interference wit! var operations was at no time serious nor was it ne sary to make any shut-down for changing over from the old charging methods to the new systen The design and construction of the improve- ments for the two plants was done on a contract or lump sum basis. The two locomotive cranes wer delivered before field operations were started. The were employed on excavations, placing of concrete, erection of steel work and machinery, etc., an when construction was completed, they were turned over as a part of the equipment for furnace opera- tions. In four months’ period of opera- tion yearly savings are indicated at th. rate of 30 per cent. on the new plant investment for the Etna plant res t 1914 dvantages of the complete automatic ap- evail. The general contract was awarded ' McKee, engineer, Cleveland, Ohio. The tor on the steel work for the Etna plant iy il riety Iron & Steel Works Company, Cleve- or the Ironton plant, the Riverside Bridge Martins Ferry, Ohio. The officers of the on & Steel Company are H. A. Marting, ind general manager, and E. O. Marting, ent and treasurer. ELECTRIC FURNACE REGULATOR I ( la Device for Controlling and Recording Heat Treating Furnace Temperatures A it spe ial type of automatic temperature re- r and regulator for electric furnaces has been ed } yy Am the market by the Thwing Instrument 145 North Fifth street, Philadelphia, Pa. designed particularly for use in connection + ele ric furnaces for the heat treatment of ols, springs, etc., but can also be used in ’ with the oil burning and gas fired fur- rhe galvanometer needle used in the control ap- is ‘ t T rom noe ol iring is insulated for about one-third of the rom the pivot, to prevent the control cur- entering the galvanometer proper and it of the coil or damaging the temperature mechanism. The amount of current car- ver the needle is only 0.1 ampere, and a relay seq pe tween the instrument and the switch con- ng the current used for operating the furnace. OV al iG } qd te able contact arm consisting of a piece of ng on the primary and secondary depress- set at the temperature at which it is hold the furnace, the chart being used There is a piece of contact metal on the face of the arm which also has a stop at ie edge, to prevent the needle from swing- this piece of contact metal. When the ture of the furnace is being raised, the f course, is closed, and the current will be ered through it to the furnace. The tempera- easured by the thermocouple in the furnace ises the needle to move over the chart scale finally depressed by the metal contact. s then completed through the contact plate k of the needle, and the auxiliary contact lock below opens the switch. As _ the ture falls, the needle is depressed, so that ‘a circuit through the contact plate, the pressor arm and the switch, which will then erry and the temperature will again rise, the vents being repeated as often as the varia- change of the furnace temperature cessary. pillary film recording device, it is empha- its frequent depressions of the needle, t necessitate the breaking of the gal- circuit to return the needle to the ink- is no bottom to the groove containing ink, and the pen passes completely ind does not deposit any more ink on the s required to make a fine, distinct dot. d against the chart continuously the pen fine ink line along the entire length of without any surplus ink running down the pen. It is pointed out that this ar- makes the outfit desirable for use in nd metallurgical laboratories, to produce ‘ curves, where a great number of rec- ned with a high chart speed is desired. is not necessary to record the tempera- ntrol apparatus may be used either as THE IRON AGE L201 an indicating pyrometer, or preferably as an aux iliary to an indicating or recording pyrometer. For use in cases of this kind an indicating pyromete: is supplied for use in calibrating the control outfit, which consists of one or more pyrometer movements carrying a piece of contact metal on the needle or pointer. This completes a circuit between a de pressor arm above the needle and one or two con tacts below three times a minute when the arm is depressed by the action of the motor or clock mounted below the pyrometer movement. Any num- ber of these movements can be mounted side by side in a single case, and the depressor arms actuated by the same clock or motor. The control is set by waiting until the auxiliary pyrometer shows that the furnace has reached the proper temperature, and then adjusting the needle so that it stands at a An Automatic Device for Regulating | Recs perature of Electric | neutral point between the two lower contacts. When the temperature rises above the maximum, the needle is depressed on the low contact which is higher on the temperature scale, thus opening the switch and causing the furnace temperature to fall It is then depressed on the contact lower in the temperature scale, closing the switch and causing the furnace temperature to rise. It is emphasized that there need be but 5 or 10 deg. difference in the temperature values of the positions of the two lower contacts, so that ver) close control can be secured. It is then possible for the workman who has to watch the furnace to de vote his time to other work, only occasionally giving attention to the furnace to remove work, cite. The degree of control depends upon the conditions. If it is desired to use the same furnace and small ap paratus for working temperatures 100 deg. apart, is it not possible to secure as close control as where conditions can be predetermined, and it is desired to work only at a certain fixed temperature. In this case the instrument can be calibrated for a much narrower range, can be made more sensitive and the control is closer. On a small electric furnace used for tempering watch springs, a range of 1800 deg. F. was covered on the chart, and control was secured to 25 deg. On a similar recorder used for tool work, where the range covered was only 800 d¢ v., it is possible to secure twice as close control. ep ee eT Ey ae Barner es ; 2. Ware. get Sey eS lt 2 ee of & 3 e Oe eer 2 The Safeguarding of Grinding Machines Report of a Committee of the National Machine Tool Builders’ Association—The Illus- trations Obtained from the Norton Company All wheel manufacturers, to the best of our belief, subject grinding wheels to a speed test. A speed test consists of revolving the wheels at higher speeds than they are recommended to oper- ate. Your committee sees no reason for changing present recommended operating speeds, and sug- gests that approval be placed on the practice of wheel manufacturers in subjecting wheels to a speed test. The recommended operating speeds should not be exceeded by the user with the pos- sible exception that cyl- inder wheels, when used in chuck which a in- 1 closes at least three- quarters of the wheel, can be operated at g- Such washers tend to distribute the | SSUre UI formly when the flanges are tightened against ; wheel. Compressible washers of blotting paper , rubber gaskets are satisfactory. Relation. between size of wheel and six machine.—Caution must be taken not to use wheels larger or thicker than recommended or provyi« for by the grinding machine manufacturer, |; is desired to use larger or thicker wheels the matter should be taken up wit) the machine turer. Relation be of hole in the whee size of arbor or spindle The hole in the wheel a the spindle on which t manui bars rwee?y speeds recommended for SS wheel is used should straight wheels. “ i of such diameters Contrel of grinding the wheel slides on machine speeds 30 fa spindle easily, yet as related to speed loose enough to in a of grinding spindle.- way cause the wheel ' Where cone pulleys are run out of true. If th in use, belt-locking de- Ld hole of the wheel is sm: ‘vices or some other ,,, ' : it can easily be scraped : The use of a small washer in place of the outside flange, as : device to prevent the at the left, concentrates the pressure near the hole, which, out, if leaded, or worked “ . . together with the relieved flange of large diameter, creates . a belt from slipping to a i very dangerous condition In the middle are shown un- out with an old file if n smaller pulley should be relieved flanges sprung by excessive tightening of nut. At leaded. Such work, he Ww . ‘ : the ght is a diagram illustrating what happens when the : used. If a wheel spindle hole in the wheel is too small for the spindle ever, should only be done is driven by a variable speed motor, speed control inclosed in a loeked case or of the motor should be some device should be by careful workmen, sit breakages are known to have resulted from proper reaming of holes. used which prevents motor from being run at too In so far as possible, your committee ‘Fe high speeds. mends that, for future designs of floor and ber aaa 8 ee machines, you adopt uniform sizes for grind MOUNTING OF WHEELS ; . wheel spindles in accordance with the table Size of flanges.—On floor and bench machines_ given. if G wiv Wheel Spindles for Floor and Bench Machines - Thickness of Wheel in Inches ‘ ‘ ‘ us 1% My 2% = Ms ‘ 4 M i ‘4 Ms ‘ ‘ y 4 M % 4 4 ‘ i ‘ “sy ‘4 “4 “4 i 4 4 ™% l l 1 ‘ : 1 1 1 ! ‘ ‘ 1 4 ‘ ‘ i ‘ - - Ms M ‘“ 4 ' ‘ | | l | a ! LM LM Lh, “4 1 ‘4 ‘ M ‘ 1 i 1 1% LM 1% 1% Ly 4 ' “4 ‘ ] l I l 1% My 1M 1% 1h { ‘ ( ti, { 1% . Ly 1% ll, 1h, Lh Lhe Lh, v i Li, 1} Ll, 1\, lls, Li, Ll, 1%, 1% , & MV, 1% i, 1, Lhe Lh Ll, 1% 1% 1% . 0) ; 11, Ly 11 Lk, 1% 1% 1% 1% 1 % 1 11 1% 1% 1% 1% 1% 9 9 2 ¢ } 1 lay l % l a 1% 1% _ 2 Z z 0 1% 1% 2 2 2 21% 2Y, 2y, © . - ‘ 2% 2% 214 2h 2h 2% ‘ straight flanges should be at least one-half the Relief of flanges.—All flanges, either straig® diameter of the wheels. Safety flanges (some- or safety shape, which are used on floor and ben times referred to as tapered, bevelled or protec- machines, should be relieved. Flanges used on tion flanges) should be of such size that not more than 4 in. of the wheel projects beyond the area of the flanges. Designers of cylindrical, universal, internal and wet tool grinding machines have found it advisable to make use of flanges smaller than half the diam- eter of the wheel. On the types of machines men- tioned, a well-designed, substantial protection hood should always be used unless the nature of the operation absolutely prevents its use: Washers.—Washers of some compressible ma- terial, which are slightly larger than the flanges, should be used between the wheel and the flanges. 1 other types of machines should be relieved where ever possible. The extent of the relief should be sue" that a flat ring bearing surface (which is appre mately one-sixteenth of the diameter of the flanges in width) is left near the periphery of the flang* Cup and cylinder wheels.—The types of wi hee chucks which inclose at least three-fourths of wheel have proved satisfactory, so that if a cylinae! wheel is used in such a chuck the mounting be considered satisfactory. When cup wheels #* mounted between flanges, beth flanges should be the same diameter and should be of such size" e the inside flange has not less than 14 in. nor ™ 4 202 ternational Harvester! esy of li n. clearance between its periphery anc the rim of the wheel. All s mounted between flanges should be cov- ich as operating conditions will allow, hood. Cup and cylinder wheels mounted in a manner similar to those the Pratt & Whitney vertical surface ma always be protected by a e surface of tection d be strong enters.—Care should be exercised in vheels with clamp centers. If the hole ‘| and the part of the center which goes le is a tight fit there