# crank

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Related to crank: crank up

## crank

crank, mechanical linkage consisting of a bar attached to a pivot at one of its ends in such a way that it is capable of rotating through a complete circle about the pivot. One of the principal uses of a crank is to turn reciprocating, or back and forth, motion into rotary motion or vice versa. A bell crank is one designed to change the direction of a linear motion.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

## Crank

the simplest rotating part of a crank mechanism. It has a cylindrical projection, the pin, whose axis is displaced relative to the axis of rotation of the crank by a distance r, which may be fixed or variable (see Figure 1).

Figure 1. Types of crank: (a) with constant radius r of pin displacement, (b) with r regulated by a slide, (c) with r regulated by a rotating disk

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

## crank

[kraŋk]
(mechanical engineering)
A link in a mechanical linkage or mechanism that can turn about a center of rotation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## Crank

In a mechanical linkage or mechanism, a link that can turn about a center of rotation. The crank's center of rotation is in the pivot, usually the axis of a crankshaft, that connects the crank to an adjacent link. A crank is arranged for complete rotation (360°) about its center; however, it may only oscillate or have intermittent motion. A bell crank is frequently used to change direction of motion in a linkage (see illustration). See Linkage (mechanism)

Cranks (a) for changing radius of rotation, and (b) for changing direction of translation
McGraw-Hill Concise Encyclopedia of Engineering. © 2002 by The McGraw-Hill Companies, Inc.

## crank

In a mechanical linkage or mechanism, a link that can turn about a center of rotation. The crank's center of rotation is in the pivot, usually the axis of the crankshaft, that connects the crank to the adjacent link. A crank is arranged for complete rotation (i.e., through 360°) about its center; however, it may only oscillate or have intermittent motion. A bell crank is frequently used to change the direction of the motion in a linkage.

## crank

1
1. a device for communicating motion or for converting reciprocating motion into rotary motion or vice versa. It consists of an arm projecting from a shaft, often with a second member attached to it parallel to the shaft
2. a handle incorporating a crank, used to start an engine or motor

## crank

2, cranky
(of a sailing vessel) easily keeled over by the wind; tender
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

## crank

(Automotive slang) Verb used to describe the performance of a machine, especially sustained performance. "This box cranks (or, cranks at) about 6 megaflops, with a burst mode of twice that on vectorised operations."
References in periodicals archive ?
Through close observation of the dynamics involved in cocking a crossbow, I was able to design a crossbow crank cocking system requiring but a fraction of the strength needed for direct hand cocking, or even the use of a rope cocking aid.
Then, the crank is not under any bending load and the motors are not subjected to any torque, and that is the reason why inverse singularities are stiffer than others.
IF CRANKS COULD BE TROLLED UNDER THE ICE, THEY WOULD EXCEL THERE, TOO.
For simulation option chooses clockwise direction for the crank wheel to shift the center of rotation of limb in upper side for lower motion chooses vice versa.
Ron Sherman Advertising Tele-productions, located in southwest Little Rock and in business for nearly 20 years, thinks it set a record with the amount of commercials it cranked out in 2005, though there's no official way of knowing.
A simpler concept with the same advantages would be a Scotch yoke system with two contrarotating cranks. (A single crank produces side forces on the piston.) One possible arrangement would consist of two pistons on one side and two on the other side of the yoke (an H configuration) for a simple four-cylinder engine.
Gabe counted orally, "3, 6, 9, 12," for each crank." I encouraged him to complete a table of values for the 3-spooi to record his interpretations.
It has three charging sources for the batteries: built-in solar panel, external DC, and dynamo hand winding crank. Just keep this radio in a sunny window and it will stay charged or turn the hand-crank generator for 1 minute for 10 minutes of radio play.
It converts mechanical power into electrical energy by using a specially-designed crank to power a cellular phone directly or charge its batteries.
Comedy Central's ambitious campaign to launch the crank-call skein "Crank Yankers" will allow Internet users to crank-call someone with an official "Crank Yankers" message.
Knee position--Your knee should be directly over the pedal when the pedal is forward with the crank horizontal to the ground.
It looks just like a conventional lantern-style flashlight except for two things there's no place to insert bat teries, and there's a hand crank on the right side.

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