Definify.com

Webster 1913 Edition


Ratchet

Ratch′et

(-ĕt)
,
Noun.
[Properly a diminutive from the same word as
rack
: cf. F.
rochet
. See 2d
Ratch
,
Rack
the instrument.]
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.
☞ 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 contrary direction.
Go,
rate
thy minions, proud, insulting boy!
Shakespeare
Conscience is a check to beginners in sin, reclaiming them from it, and
rating
them for it.
Barrow.

Webster 1828 Edition


Ratchet

RATCH'ET

,
Noun.
In a watch, a small tooth at the bottom of the fusee or barrel, which stops it in winding up.