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US Patent: 172,241
Monkey-Wrench
Patentee:
Elisha T. Barlow - San Francisco, CA

USPTO Classifications:
81/129, 81/129.5, 81/155

Tool Categories:
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. Sterling
C. W. Forbes
F. O. Wegener
Geo. A. Worz

Patent Dates:
Applied: Jan. 08, 1876
Granted: Jan. 11, 1876

Patent Pictures:
Elisha T. Barlow Pat. January 11, 1876
USPTO pdf tiff
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Description:
The movable jaw is held in position by intermeshing rack teeth that are disengaged by the movement of the side handle. The adjusting mechanism is enclosed in a case. An eccentric cam-wheel at the base of the casing shifts the bearing end of the racks sufficiently to take up lost motion.

This is the 3rd of 3 patents granted to Barlow on this date.

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