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US Patent: 17,609
Screw Wrench
Improved Screw-Wrench
Patentee:
George C. Taft - Worcester, MA

USPTO Classifications:
81/163

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

Assignees:
Henry W. Mason - Worcester, MA

Manufacturer:
Taft and Gleason - Worcester, MA

Witnesses:
W. A. Williams
Henry W. Mason

Patent Dates:
Applied: Mar. 28, 1857
Granted: Jun. 16, 1857

Patent Pictures:
Taft & Mason patent June 16, 1857
USPTO pdf tiff
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Nathan Whipple wrench patent application drawing (FLICKR)
Description:
Double male-threaded "nut" parallel to the shank engages female threads on the inside of the handle ferule and the inside of the adjustable jaw. The specifications differentiate this design from Loring Coes' April 16, 1841 patent 2,054 and Nathan Whipple's May 24, 1854 patent (patent application denied; the patent application including drawing appears in: COLLINS COMPANY vs. LORING COES, et al: Pleadings and Evidence. Boston, 1879).

Ken Cope's "American Wrench Makers 1830-1930" identifies the partnership of George C. Taft and John Gleason as producers of this patent, but it was not included in a list of patents Taft "licensed" to Daniel Hawkins, Jr. in 1859.

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