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A British police officer's duty belt, with Hiatts Speedcuffs, handcuff keys and CS spray visible.. A police duty belt (sometimes referred to as a gun belt, "duty rig" and/or kit belt [1]) is a belt, typically constructed of nylon or leather used by police, prison and security officers to carry equipment easily in a series of pouches attached to the belt, in a readily-accessible manner, while ...
A toothed belt, timing belt, cogged belt, cog belt, or synchronous belt is a flexible belt with teeth moulded onto its inner surface. Toothed belts are usually designed to run over matching toothed pulleys or sprockets. Toothed belts are used in a wide array of mechanical devices where high power transmission is desired.
They consist of a very thin belt (0.5–15 millimeters or 100–4000 micrometres) strip of plastic and occasionally rubber. They are generally intended for low-power (less than 10 watts), high-speed uses, allowing high efficiency (up to 98%) and long life. These are seen in business machines, printers, tape recorders, and other light-duty ...
Toothed belt drives are designed to limit this issue by operating at a constant pitch radius [11]). Chains are often narrower than belts, and this can make it easier to shift them to larger or smaller gears in order to vary the gear ratio. Multi-speed bicycles with derailleurs make use of this. Also, the more positive meshing of a chain can ...
A planetary gear train provides high gear reduction in a compact package. It is possible to design gear teeth for gears that are non-circular, yet still transmit torque smoothly. The speed ratios of chain and belt drives are computed in the same way as gear ratios. See bicycle gearing.
The end housing Modern encoder for continuous monitoring of speed, position and direction of rotation Internal gear Conveyor belt. The drum motor uses an asynchronous or synchronous electric motor, or hydraulic motor fixed to a stationary shaft.
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The rotor portion of the clutch becomes magnetized and sets up a magnetic loop that attracts the armature. The armature is pulled against the rotor and a frictional force is generated at contact. Within a relatively short time, the load is accelerated to match the speed of the rotor, thereby engaging the armature and the output hub of the clutch.
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