Section 69.—RAISING AND LOWERING.
(See also [p. 148].)
[2396]. Richmond’s patent balance hydraulic lift. A is the lift cylinder, connected openly to the balance cylinder B, which is weighted to nearly balance ram A and cage. Pressure water is applied to ram C to raise the load in cage.
[2397]. Waygood’s patent hydraulic balance lift. A is the lift cylinder communicating with the interior of cylinder and ram B which are fixed; cylinder C and ram D are loaded to nearly balance the cage and ram A, and the load is raised by admitting pressure water to cylinder C.
[2398]. Lever and rack lifting motion. The rack may be held up at each lift by a pawl.
[2399]. Rack and lever suspended hoist. A pawl or brake may be added to sustain the load.
[2400]. Spanish windlass.
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