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US Patent: 207,709
Wrench
Patentee:
Henry W. Brett - Boston, MA

USPTO Classifications:
81/127, 81/129.5, 81/177.8

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Edwin W. Brown
Geo. H. Earl
Chas. E. Hibbard

Patent Dates:
Applied: Feb. 15, 1878
Granted: Sep. 03, 1878

Patent Pictures:
Henry W. Brett patent September 3, 1878
USPTO pdf tiff
Google Patents
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Description:
The angle of the head to the handle is adjustable, and the head has a movable jaw adjustable by a rack and gear wheel. A sliding pawl in the handle can engage or release the gear wheeel. With the pawl engaged, the wrench works as a self-adjusting nut wrench.

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