Five hundred and seven mechanical movements (1903)
Brown, Henry T. [from old catalog] · New York, Brown & Seward · leaf 75
ched by a pin, d, and spring, c, and thepin is connected by two elbow levers withtwo pawls, d, which work in ratchets securedto the uprights, A. The weight of the plat-form and the tension of the rope keep thepawls out of gear from the ratchets in hoist-ing or lowering the platform, but in case… … Mechanical Movements. 71 279. Crank and slotted cross-head, withClaytons sHding journal-box appHed to thecrank-wrist. This box consists of two ta-per Hning pieces and two taper gibs adjust-able by screws, which serve at the sametime to tighten the box on the wrist and toset it out to the slot in…
Mechanical movements
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