bell crank

American  

noun

Machinery.

1. a lever or rocker having two arms meeting at a pivot at a right angle, used for transmitting motion between two parts meeting at an angle.

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bell crank British  

noun

1. engineering a lever with two arms having a common fulcrum at their junction

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Other Word Forms

• bell-cranked adjective

Etymology

Origin of bell crank

First recorded in 1880–85

Example Sentences

The smaller arm of this bell crank is jointed to a bolt, which shoots into notches, made in one of the segments between which the lever moves.

From A Catechism of the Steam Engine by Bourne, John, C.E.

In this groove is a steel roller upon a pin attached to the bell crank operating the main valve stem.

From Mechanical Drawing Self-Taught by Rose, Joshua

When the piston reaches the bottom of its power stroke, the exhaust valve is lifted by means of the bell crank which is rocked because of the point or lift on the cam.

From Aviation Engines Design?Construction?Operation and Repair by Pag?, Victor Wilfred

The lower end of the shaft d is connected with a bell crank, f′, which, in turn, is connected by a rod, k l, with the valve i.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

Q. If the horizontal arm of bell crank should break?

From The Traveling Engineers' Association To Improve The Locomotive Engine Service of American Railroads by Anonymous