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A simple dumbwaiter is a movable frame in a shaft, dropped by a rope on a pulley, guided by rails; most dumbwaiters have a shaft, cart, and capacity smaller than those of passenger elevators, usually 45 to 450 kg (100 to 992 lbs.) [2] Before electric motors were added in the 1920s, dumbwaiters were controlled manually by ropes on pulleys.
An elevator (American English) or lift (Commonwealth English) is a machine that vertically transports people or freight between levels. They are typically powered by electric motors that drive traction cables and counterweight systems such as a hoist , although some pump hydraulic fluid to raise a cylindrical piston like a jack .
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.
However, the industry does not have universal standard terminology. These lifts can also be referred to as: material lift, parts lift, pallet lift, vertical lift, freight lift, utility lift, box lift, cargo lift, platform lift, baggage lift, vertical conveyor, and dumbwaiter. None of these terms use the word "elevator".
The Aichi small-elevator manufacturing corporation is a manufacturer of vertical transportation systems, mainly elevators and Dumbwaiters. Founded in Aichi, Japan in 1969. Aichi small-elevator manufacturing corporation makes a speciality of small elevators, dumbwaiter and passenger lifts beside staircases.
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