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The Iron Age 1889-05-09: Vol 43

1889 Reed Business Information US

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THE IRON GE THurRsDAY, MAy 9, 1889 New Mechanical Air-Valve Gear. | ™eet this condition automatic releasing |steam cylinders are entirely different. ” gears have been applied, involving an} Under the dry heat of compressed air From the recently issued catalogue of | amount of complexity which cann >t com- | slide-valves are very apt to cut and score the Rand Drill Company, of New York, | mend itself to sound mechanical judg-| themselves and their seats, and so become we take the accompanying engravings and| ment. The following gear fulfills per-| leaky. This requires replaning or boring description of their new mechanical air- | fectly the varied requirements imposed by | the seats, which is a machine job and in- valve gear: the discharge-valves, and instead of being | volves expense and delay. Apart from Many attempts have been made to | an added complexity, it actually reduces|the tendency to cut, such valves are un- provide a positive movement for air-!the number of parts in a marked degree. ! favorably situated for tightness at best. Sheet Lron flue to bring \ air from out of doors, Fig. 2.—Vertical Longitudinal Section. NEW MECHANICAL AIR-VALVE GEAR.—RAND DRILL COMPANY. valves…

Citation

The Iron Age 1889-05-09: Vol 43. Reed Business Information US. 1889.