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US Patent: 87,774
Improvement in Wrenches
Mode of Constructing a Tubular Adjusting Screw-Wrench
Henry Wheaton Hewet - New York, NY

USPTO Classifications:
81/170, 81/177.1

Tool Categories:
wrenches : nut wrenches


Champlin & Spencer - Chicago, IL

Henry D.B. Lefferts
Paul R. Van Mater

Patent Dates:
Granted: Mar. 16, 1869
Antedated: Feb. 27, 1869

Patent Pictures: [ 1 | 2 | 3 ]
Henry W. Wheaton patent Febr. 27, 1869
USPTO pdf tiff
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Tubular adjustment member with male threads engages female threads cut in adjustable jaw. The 5 inch size was marketed as the Hewet "Little Giant" Screw Wrench. The patent drawings show internal handle differences between iron handle and wood handle versions.

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