2. The lock of a fusee or carbine; also, the fusee or carbine
itself. [Obs.]
3. An iron instrument having a jaw to fit a nut or the head
of a bolt, and used as a lever to turn it with; a wrench;
specifically, a wrench for unscrewing or tightening the
couplings of hose.
4. pl. A contrivance in some of the ealier steam engines for
moving the valves for the alternate admission and shutting
off of the steam.