previous next

Ratch′et-wheel.

A wheel having inclined teeth for receiving a ratchet or detent, by which motion is imparted or arrested.

The teeth are of such shape as to revolve and pass the detent in one direction only. The detent may be a pallet, as at a, or a pawl, as at b. The former receives an intermittent rotation by a reciprocating circular movement of the arbor and its cam. The wheel in the second figure is intermittingly rotated by the motion of one pawl, while the other one acts as a detent in the intervals between the forward motions of the former.

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 United States License.

An XML version of this text is available for download, with the additional restriction that you offer Perseus any modifications you make. Perseus provides credit for all accepted changes, storing new additions in a versioning system.

hide Places (automatically extracted)

View a map of the most frequently mentioned places in this document.

Download Pleiades ancient places geospacial dataset for this text.

hide Display Preferences
Greek Display:
Arabic Display:
View by Default:
Browse Bar: