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Definition of ratchet (Meaning of ratchet)
1 Definition found
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Ratchet Ratch"et (-[e^]t), n. [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.
	        [1913 Webster]
	
	     2. A mechanism composed of a ratchet wheel, or ratch, and
	        pawl. See {Ratchet wheel}, below, and 2d {Ratch}.
	        [1913 Webster]
	
	     {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.
	        [1913 Webster]
	        [1913 Webster]
	
	     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
	           contrary direction.
	           [1913 Webster]

From The Collaborative International Dictionary of English v.0.44
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