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US Patent: 142,143
James R. Brown - Cambridgeport, MA

USPTO Classifications:
81/398, 81/400

Tool Categories:
wrenches : pipe wrenches : pipe tongs

Hazen P. Huntoon - Cambridgeport, MA
James R. Brown - Cambridgeport, MA

Not known to have been produced

S. W. Piper
L. N. Moeller
R. H. Eddy
J. R. Snow

Patent Dates:
Applied: Mar. 15, 1873
Granted: Aug. 26, 1873

Patent Pictures:
James R. Brown Pat. August 26, 1873
USPTO pdf tiff
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The intermediate yoke differentiates this tongs from Brown's Nov. 30, 1858 patent (no. 22,157).

"In my new pipe-tongs the parts are easier oiled, the fulcrum-pin is better supported, can be made stronger, and is less liable to be twisted or bent." -- from the specifications.

This design along with alternatives in 144,253 and 145,929 was folded into a broader patent in Canada (patent no. CA-2,923) and Britain (GB-187303762) with Hazen P. Huntoon as assignee.

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