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US Patent: 172,240
Improvement in Monkey-Wrenches
Elisha T. Barlow - San Francisco, CA

USPTO Classifications:
81/129.5, 81/142

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


Not known to have been produced

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

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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The adjusting mechanism is comprised of "T"-shaped binding plates carried in a recess in the movable jaw, combined with a sliding key which releases their binding action to allow the jaw to be adjusted. This complicated mechanism is enclosed in a cap.

This is the 2nd of 3 wrench patents granted to Barlow on this date.

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