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US Patent: 1,223,012
Screw Thread Gaging Device
Frederick W. Whelpley - Greenfield, MA
Frank A. Bicknell - Greenfield, MA

USPTO Classifications:

Tool Categories:
metalworking tools : machinist tools : measuring tools : thread gages


Not known to have been produced

G. R. Driscoll
Roland A. Frye
Herbert S. Huricke

Patent Dates:
Applied: Jun. 05, 1916
Granted: Apr. 17, 1917

Patent Pictures:
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Horatio S. Bellows - patent attorney

This invention relates to a novel device or instrument for gauging and testing the pitch or "lead" of screw threaded parts, and has for its object to provide a device of simple and comparatively inexpensive structural character, and which is susceptible of quick and convenient use for determining whether the threads on an article, as for instance a tap, die or other threaded piece, and designed to be of a certain number to an inch are truly formed as per the requirement, or at variance therefrom to any appreciable extent.

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