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The Iron Age 1902-12-18: Vol 70

1902 Reed Business Information US

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‘THE IRON AGE TuHurspay, Dt The Locke Electric Reck Drill. The principle of the Locke electric drill is the con verting of rapid rotary motion into reciprocating mo tion and the drill is, therefore, a percussion drill, some what similar to the usual form of air drills. It is essen o CEMBER 18, 1902 extension shaft, bB, Fig. 2, thus doing away with the usual flexible shaft of other electrie drills. It can be detached easily and carried back from the work by one man, as it weighs only 95 pounds, or two men can handle the whole drill without disconnecting. The motor runs in ball bearings, as shown in the section. It is shunt THE LOCKE ELECTRIC ROCK DRILL. tially a ball bearing machine, is made dust and water proof, and only requires a few drops of oil at intervals of an hour or more to keep it in perfect working order. The shank or base of the drill is made to fit the clamp or saddle usually used upon the ordinary 414-inch column or arm. The motor is direct connected by means of a hollow wound, *% horse-power, makes 2500 revolutions per min- ute and uses a 220-volt direct current. Any other motor, such as rotary steam or air, will operate the drill equally as well provided it gives th…

Citation

The Iron Age 1902-12-18: Vol 70. Reed Business Information US. 1902.