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US Patent: 135,842
Nathan L. Post - East Cleveland, OH

USPTO Classifications:
411/918, 81/124.7, 81/125, 81/177.85

Tool Categories:
wrenches : axle nut wrenches


N. L. Post - Cleveland, OH

C. L. Evert
Lewis W. Ford
Franck L. Ourand

Patent Dates:
Applied: Dec. 23, 1872
Granted: Feb. 11, 1873

Patent Pictures: [ 1 | 2 ]
Nathan L. Post Pat. Feb. 11, 1873
USPTO pdf tiff
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The patent adds a handle and a rubber nut retainer to "the ordinary carriage wrench." The drawing shows this feature as a rubber ring and notches in the socket. The specifications make a broader claim for including a rubber gripper of some sort in the socket.

Ken Cope's "American Wrench Makers 1830-1930" reprints an 1873 "Scientific American" item indicating the wrench was produced with a rubber roller in one side of the socket rather than the rubber ring shown in the patent drawings.

Some wrenches marked with the patent date have two or three "box" sizes.

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