- friction ratchet
- 摩擦棘轮机构
English-Chinese dictionary of mining (英汉矿业大词典). 2013.
English-Chinese dictionary of mining (英汉矿业大词典). 2013.
Ratchet (device) — In mechanical engineering, a ratchet is a device that allows linear or rotary motion in only one direction, while preventing motion in the opposite direction. Ratchets are used in many other mechanisms, including clocks, capstans, turnstiles,… … Wikipedia
ratchet stop — noun : a device for limiting the motion of machinery in one direction that consists of a ratchet wheel or bar and a pawl which acts as a positive stop or controls the motion through a friction brake … Useful english dictionary
Perpetual motion — For other uses, see Perpetual motion (disambiguation). Robert Fludd s 1618 water screw perpetual motion machine from a 1660 wood engraving. This device is widely credited as the first recorded attempt to describe such a device in order to produce … Wikipedia
Continuously variable transmission — Transmission types Manual Sequential manual Non synchronous Preselector Automatic Manumatic Semi automatic Electrohydraulic Dual … Wikipedia
Mechanical watch — The movement of a Russian watch A mechanical watch is a watch that uses a mechanical mechanism to measure the passage of time, as opposed to modern quartz watches which function electronically. It is driven by a spring (called a mainspring) which … Wikipedia
Escapement — redirects here. For the fisheries term for the stock surviving fishing pressures over a spawning cycle, see Spawn (biology). For other uses, see Escapement (disambiguation). A deadbeat escapement, used in many pendulum clocks. Click above to see… … Wikipedia
Prusik — Knot details name=Prusik knot names= Prusik hitch type= hitch strength= origin= Dr.Karl Prusik, 1931 related= releasing= Non jamming uses= Climbing caveat= abok number= #1763A Prusik is a friction hitch or knot used to put a loop of cord around a … Wikipedia
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Mechanical pencil — A mechanical pencil (U.S. English) or a propelling pencil (UK English)[1][2][3] is a pencil with a replaceable and mechanically extendable solid pigment core called a lead ( / … Wikipedia