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US Patent: 644,825
Wrench
Improvements in Tongs and Wrenches
Patentee:
Thomas Jensen - Arendal, Norway

USPTO Classifications:
81/365, 81/408, 81/413

Tool Categories:
wrenches : pliers type wrenches
wrenches : wrench adjustment types : auxiliary levers on wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Ella L. Giles
C. A. Middleton
G. Sviggum
J. B. Mijan

Patent Dates:
Applied: Jan. 03, 1900
Granted: Mar. 06, 1900

Patent Pictures:
Thomas Jensen patent March 6, 1900
USPTO pdf tiff
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Description:
Compound leverage adjustable pivot point pliers type tool. A spring at the pivot point for the two primary "arms" holds the adjustable pivot point in contact with the auxiliary handle. The basic form is similar to the pliers type tool in Jensen's Dec. 26, 1899 patent no. 639,812.

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