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US Patent: 451,833
Adjustable Wrench
Improved Spanner
Patentee:
Jacob Mueller - Burbach, Germany

USPTO Classifications:
81/129.5

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Chas. M. Werle
E. C. Duffy
Carl Blass
Carl Mueller

Patent Dates:
Applied: Jun. 26, 1890
Granted: May 05, 1891

Patent Pictures:
Jacob Mueller patent May 5, 1891
USPTO pdf tiff
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Description:
The movable jaw has a central opening with "teeth" at the outer ends. The main shank has teeth on opposite edges. In use, the movable jaw rocks so that diagonally opposite teeth on the jaw engage the teeth on the shank to hold the adjustment.

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