Bell crank n. A lever whose two arms form a right angle, or nearly a right angle, having its fulcrum at the apex of the angle. It is used in bell pulls and in changing the direction of bell wires at angles of rooms, etc., and also in machinery.
... has taken the basket into her sitting room. She's placed it on a table. There she goes to the telephone. Whee! See how she's working her arm, jerking that telephone bell crank!" ... — The Grammar School Boys of Gridley - or, Dick & Co. Start Things Moving • H. Irving Hancock
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