1833 J. Holland II. 278 The principle [of Strutt's lock]..consists in a number of quadrant levers.
1919 6 May 6/3 A neat three-speed gear-box, controlled by a quadrant lever mounted on the tank, is attached low down in the frame.
2005 (Nexis) 25 Nov. 1 Electronic linkage control is a £900 option replacing quadrant levers.