Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 42,903
I. Schwartzkopff - Berlin, Kingdom of Prussia
E. Kaselowsky - Berlin, Kingdom of Prussia

USPTO Classifications:

Tool Categories:
wrenches : wrench adjustment types : self-adjust wrenches


Not known to have been produced

A. Lemetson
H. Kreismann

Patent Dates:
Granted: May 24, 1864

Patent Pictures:
Schwartzkopff & Kaselowsky Pat. May 24, 1864
USPTO pdf tiff
Google Patents
Report data errors or omissions
The patent is for a self-adjusting mechanism using a linking bar, an eccentric on the end of a pivoting handle, and a sliding jaw. The specifications note the jaw faces could be smooth for nuts or have gripping teeth for pipe. This is the first U.S. wrench patent from a European patentee.

Corresponding British patent GB-186300945 was registered April 21, 1863.

Schwartzkopf's Adjusting Spanner was produced in Britain by the Argus Works of Sheffield. A modification to allow locking the adjustment was proposed in British patent GB-188502260 registered Feb. 19, 1885.

Copyright © 2002-2018 - DATAMP