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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. [1]
Rack with sample component sizes including an A/V half-rack unit. A rack unit (abbreviated U or RU) is a unit of measure defined as 1 + 3 ⁄ 4 inches (44.45 mm). [1] [2] It is most frequently used as a measurement of the overall height of 19-inch and 23-inch rack frames, as well as the height of equipment that mounts in these frames, whereby the height of the frame or equipment is expressed ...
Yan Lift, known in its later years as Lift Engineering, built 31 high speed quads between 1987 and 1994, mostly in the United States and Canada. The detachable grips were of an unusual design, in which a steel bar with V-shaped troughs sat atop the haul rope and were held in place by tensioning assembly with rubber springs.
India – Indian Standard – Installation and Maintenance of home lifts (Code of practice 2002) [96] US – ASME A17; converged in ISO 22559 series, "Safety requirements for lifts (elevators)": [97] [98] Part 1: Global essential safety requirements (GESRs). Part 2: Safety parameters meeting the global essential safety requirements (GESRs).
A paternoster (/ ˌ p eɪ t ər ˈ n ɒ s t ər /, / ˌ p ɑː-/, or / ˌ p æ-/) or paternoster lift is a passenger elevator which consists of a chain of open compartments (each usually designed for two people) that move slowly in a loop up and down inside a building without stopping. Passengers can step on or off at any floor they like.
Adjustable three-point ball on lift arm. Ball may be rotated to fit either Category I or Category II implements Rear three-point hitch of a Case IH tractor with implement attached by the drawbar. There are five different hitch sizes, called categories. The higher category hitches have sturdier lift arms and larger connector pins. [2]
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