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US Patent: 166,020
Robert Hall McCormick - Chicago, IL
William R. Baker - Chicago, IL

USPTO Classifications:
81/155, 81/174

Tool Categories:
wrenches : wrench components : wrench jaw components
wrenches : wrench adjustment types : screw adjust wrenches
wrenches : nut wrenches

Robert Hall McCormick - Chicago, IL

McCormick Harvester Co. - Chicago, IL

Harry King
H. H. Young
F. H. Matthews
D. McIntyre

Patent Dates:
Applied: Apr. 13, 1875
Granted: Jul. 27, 1875

Reissue Information:
Reissued as RE7,173 (Jun. 13, 1876)

Patent Pictures: [ 1 | 2 ]
R. H. McCormick & W. R. Baker patent July 27, 1875
USPTO pdf tiff
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The movable jaw of this malleable iron wrench has lips which slide over flanges on the shank. The base of the movable jaw is attached to the shank by the adjusting nut. This design was used for an inexpensive adjustable wrench accompanying agricultural implements and other machinery.

See also patent nos. 140,111, 155,139 and 206,733 for other takes on this general form.

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