ratchet wheel


  • WordNet 3.6
    • n ratchet wheel toothed wheel held in place by a pawl or detent and turned by a lever
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Webster's Revised Unabridged Dictionary
    • 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 literature:

Each shaft with its dial was provided with two ratchet wheels, one the reverse of the other.
"Edison, His Life and Inventions" by Frank Lewis Dyer and Thomas Commerford Martin
When the tympanum vibrates under the influence of the voice, the stylus acts as a pawl and turns a ratchet-wheel.
"Heroes of the Telegraph" by J. Munro
The ratchet of the wheel clacked, and the hurried ticking was loud.
"The Price of Love" by Arnold Bennett
Every ferry passenger is familiar with the rapid tinkling of the ratchet wheel that warps the landing stage up to the level of the boat's deck.
"Mince Pie" by Christopher Darlington Morley
The ratchet wheels, therefore, are all stepped in unison.
"Cyclopedia of Telephony & Telegraphy Vol. 1" by Kempster Miller
Another mooted point in the lever escapement is, to decide between the merits of the ratchet and the club-tooth escape wheel.
"Watch and Clock Escapements" by Anonymous
There was a moment's silence, then a sudden clicking of a ratchet wheel, and Allison began to rise rapidly towards the ceiling.
"The Jester of St. Timothy's" by Arthur Stanwood Pier
H is a ratchet-wheel, which, like the key-board, is insulated from the rest of the apparatus.
"Scientific American Supplement, No. 315, January 14, 1882" by Various
Wound up with a ratchet-wheel.
"The Joyful Heart" by Robert Haven Schauffler
By means of pawls which engage in the ratchet-wheel, the bit can be turned in either direction at the will of the user.
"Handwork in Wood" by William Noyes

In news:

This ratchet wheel is part of a seatbelt retractor system from Key Safety Systems.