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He claimed that many engineering firms conceded on the difficulty of efficiently disengaging the chain from the teeth as the pulleys turned, but his firm developed a "pitch" chain which solved the issue. Marketed as "Weston Differential Pulley Blocks with Patent Chain Guides", the pulley had good sales, namely, 3000 sets in 9 months.
Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.
ASME B30.16 - Overhead Hoists (Underhung) ASME B30.20 - Below-the Hook Lifting Devices; ASME HST-1 - Performance Standard for Electric Chain Hoist; ASME HST-2 - Performance Standard for Hand Chain Manually Operated Chain Hoists; ASME HST-4 - Performance Standard for Overhead Electric Wire Hoists; ASME HST-5 - Performance Standard for Air Chain ...
Chain – Series of connected links which are typically made of metal; Chain hoist – Device used for lifting or lowering a load; Chain stopper; Come-along – Lever operated, portable ratchet winch; Crane (machine) – Type of machine; Crawler (rigging) Hook – Tool used to grab onto, connect, or attach to something
Counter jib: holds counterweights, hoist motor, hoist drum and the electronics. (In many older tower crane designs the hoisting devices and electronics were located in the mast foot.) [ 65 ] Hoist winch : the hoist winch assembly consists of the hoist winch (motor, gearbox, hoist drum, hoist rope, and brakes), the hoist motor controller, and ...
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