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US Patent: 23,725
Improved Double Acting Screw-Wrench
George C. Taft - Worcester, MA

USPTO Classifications:

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


D. A. Hawkins - Worcester, MA

James H. Bancroft
Wm. H. Taft

Patent Dates:
Granted: Apr. 19, 1859

Patent Pictures: [ 1 | 2 ]
George C. Taft patent April 19, 1859
USPTO pdf tiff
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"The thumb nut operates a right and left hand screw.." - from a contemporary catalog description.

In the specifications it is described as an improvement of Taft's June 16th, 1857 patent No. 17,609. In actual appearance it is an alteration of Taft's May 25, 1858 patent 20,379.

The wrench appears in an 1859 hardware catalog as "COE'S NEW PATENT WRENCH," although a July 1859 contract between Taft & D.A. Hawkins included Hawkins' right to produce the wrench (along with 20,379 and 23,798) with royalties to be paid to Taft.

No example of the wrench is known to have survived.

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