The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purpose; (1902)
Barber, Thomas Walter. [from old catalog] · New York, Spon & Chamberlain · leaf 189
a roller attop and bottom of lift, and attached to the top and bottom ofcage and rising and falling with it, so that the doors into lift areall covered at all times except the one at which the cage happensto stand. Safety valves (see Section 89). Various automatic alarm signalsare applied to… … l84 THE ENGINEERS SKETCH-BOOK. Section 82.—STEAM TRAPS. To collect and discliarge condensed steam from pipes, &c. t499. Trap operated by a modified form of ball cock, which rises as the box jSlls with condensed water and opens the discharge valve. 1500. Effects the sam.e object by a floating…
Mechanical movements
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