bell crank

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.

Origin of bell crank

First recorded in 1880–85

bell-cranked, adjective

When in operation, the bell-crank is rotated in the direction of the arrow by the action of the wrist-plate and connecting-rod.

Steam Engines |Anonymous
A short rope spliced round a thimble in the eye of the bell-crank, with a double wall-knot crowned at its end.

The Sailor's Word-Book |William Henry Smyth
The car is drawn to the rear end of the track and held by the bell-crank lever A (Plate 23).

Langley Memoir on Mechanical Flight, Parts I and II |S. P. (Samuel Pierpont) Langley and Charles M. (Charles Matthews) Manly
This in turn operates the lever L through rod R and a bell-crank attachment, as shown in the right-hand view.

Steam Engines |Anonymous

Referring to Fig. 23, A is a bell-crank which turns loosely upon the valve stem V.

Steam Engines |Anonymous

bell crank

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