The DICT Development Group
2 definitions found
for Ratchet Wheel
From The Collaborative International Dictionary of English v.0.48 :
Ratchet \Ratch"et\ (-[e^]t), n. [Properly a diminutive from the
same word as rack: cf. F. rochet. See 2d Ratch, Rack the
1. A pawl, click, or detent, for holding or propelling a
ratchet wheel, or ratch, etc.
2. A mechanism composed of a ratchet wheel, or ratch, and
pawl. See Ratchet wheel, below, and 2d Ratch.
Ratchet brace (Mech.), a boring brace, having a ratchet
wheel and pawl for rotating the tool by back and forth
movements of the brace handle.
Ratchet drill, a portable machine for working a drill by
hand, consisting of a hand lever carrying at one end a
drill holder which is revolved by means of a ratchet wheel
and pawl, by swinging the lever back and forth.
Ratchet wheel (Mach.), a circular wheel having teeth,
usually angular, with which a reciprocating pawl engages
to turn the wheel forward, or a stationary pawl to hold it
from turning backward.
Note: In the cut, the moving pawl c slides over the teeth in
one direction, but in returning, draws the wheel with
it, while the pawl d prevents it from turning in the
From WordNet (r) 3.0 (2006) :
n 1: toothed wheel held in place by a pawl or detent and turned
by a lever
Questions or comments about this site?