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US Patent: 69,911
Improvement in Wrenches
Dennis Harrigan - Charlestown, MA

USPTO Classifications:
81/165, 81/176, 81/177.8

Tool Categories:
wrenches : wrench adjustment types : angle adjustable wrenches
wrenches : wrench components : wrench jaw components


Not known to have been produced

R. H. Eddy
F. P. Hale, Jr.

Patent Dates:
Granted: Oct. 15, 1867

Patent Pictures:
Dennis Harrigan Pat. Oct. 15, 1867
USPTO pdf tiff
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A base plate with holes in its periphery can be turned to seveveral angles in relation to the handle, and held by a spring bolt engaging one of the holes. The base plate holds an adjustable wrench. The adjustment is made by a knurled screw engaging a rack. The specifications contrast this deign with George Meader's Jan. 17, 1865 patent no. 45931.

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