Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 286,653
Henry Artemas Thompson - Farmington, ME

USPTO Classifications:
7/139, 81/185.1

Tool Categories:
wrenches : wrench adjustment types : screw adjust wrenches


Portland Wrench Co. - Portland, ME
Diamond Wrench Co. - Portland, ME

F. L. Middleton
Walter Donaldson
Ed. P. Page
W. B. Nutter

Patent Dates:
Applied: Feb. 09, 1883
Granted: Oct. 16, 1883

Patent Pictures: [ 1 | 2 ]
H. A. Thompson Pat. Oct. 16, 1883
USPTO pdf tiff
Google Patents
Report data errors or omissions
An improvement on Thompson's Nov. 2, 1880 patent (no. 234,091). The patent adds a friction spring inside the moveable jaw, and a detachable supplemental hammer piece. These features are not normally found on the wrenches bearing this patent date. Some wrenches were produced that match the appearance of Thompson's Canadian patent CA-13,865.

See also Canadian patent CA-21,633 for another friction spring applied to the movable jaw of this type of wrench.

Copyright © 2002-2019 - DATAMP