1825 ‘J. Nicholson’ 38 A locking clutch is fitted upon the spindle between these two wheels.
1914 12 Aug. 334/2 The hand wheel operating the locking clutch is conveniently close.
2007 M. J. Nunney (ed. 4) xx. 429/2 The actuation of the locking clutch is usually performed through an air shift unit.