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US Patent: 1,071,666
Wrench
Patentees:
Charles Hansen - Mingo, IA
Conrad Heberer - Mingo, IA

USPTO Classifications:
81/177.9

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

Assignees:
None

Manufacturer:
C and E Mfg. Co. - Marshalltown, IA

Witnesses:
W. A. Loftus
A. C. Hague
L. Baker
A. H. Hutson

Patent Dates:
Applied: Mar. 24, 1913
Granted: Aug. 26, 1913

Patent Pictures: [ 1 | 2 | 3 ]
Hansen and Heberer patent August 26, 1913
USPTO pdf tiff
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Description:
Interchangeable heads can adjust at an angle to the shank. and shift position in ratchet fashion due to teeth on their "back" edge, and the conformation of the spring that holds the head in place.

Produced with four sizes of interchangeable open end heads and a fixed size alligator wrench on the end of the handle as the MARSHALLTOWN by the C & E Mfg. Co. of Marshalltown, Iowa.

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