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US Patent: 1,371,952
Wrench
Patentee:
Paul John Tumulla - Chicago, IL

USPTO Classifications:
81/134, 81/185.2

Tool Categories:
wrenches : pipe and nut combination wrenches
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
None

Manufacturer:
Champion Wrench Co. - Chicago, IL

Witnesses:
R. N. Hoge

Patent Dates:
Applied: Mar. 22, 1920
Granted: Mar. 15, 1921

Patent Pictures: [ 1 | 2 ]
Paul John Tumulla patent March 15, 1921 , with photo of CHAMPION wrench - photo courtesy Martin Donnelly mjdtools.com
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Description:
The pivoted lever handle has rack teeth that engage rack teeth on the main shank.

Marked CHAMPION PATENT MARCH 15 1921.

Ken Cope's "American Wrench Makers 1830-1930" speculates Tumulla operated his own company to produce these. A 1921 hardware trade journal notice of the formation of the company provided the manufacturer's name.

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