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US Patent: 159,119
Improvement in wrenches
Brace-wrench
Patentee:
Sylvanus Edward Robinson - Marshfield, WI

USPTO Classifications:
81/171

Tool Categories:
wrenches

Assignees:
None

Manufacturer:
Peter Lowentraut - Newark, NJ

Witnesses:
J. Henry McNeel
D. Babcock
Robert Everett
F. J. Masi

Patent Dates:
Applied: Dec. 05, 1874
Granted: Jan. 26, 1875

Patent Pictures: [ 1 | 2 ]
Sylvanus E. Robinson patent Jan. 26, 1875
USPTO pdf tiff
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Description:
A version of this wrench with a hammer poll and claw as the "crank handle", and with a wing-nut to turn the adjusting screw was produced. One such piece was reported as marked "Lowentraut Pat. Jan 26, 1875." Other examples include markings referencing Robinson's Dec. 25, 1877 patent (no. 198,685) and "Robinson's Crank Wrenches and Bit-Brace Co."

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