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US Patent: 1,440,381
Adjustable Wrench
Patentee:
Otto E. Edstrom - Cary, IL

USPTO Classifications:
81/145, 81/151

Tool Categories:
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
None

Manufacturer:
Edstrom Machinery Company - Cary Station, IL

Witnesses:
Rudolph I. Berg
Charles W. Hills, Jr.
Fred E. Paesler

Patent Dates:
Applied: Dec. 27, 1920
Granted: Jan. 02, 1923

Patent Pictures: [ 1 | 2 ]
Otto E. Edstrom patent January 2, 1923
USPTO pdf tiff
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Description:
A spring connection between the frame and movable jaw tends to close the jaw. A sliding pawl with an angled slot holds the adjustment. The pawl is moved by a sliding button.

A 1921 ad in Automobile Trade Journal shows this wrench produced by Edstrom at Cary, IL; an early 1921 notice for it gives Jessop & Thompson of Chicago as the maker.

Also used in conjunction with Edstrom's June 19, 1923 patent (no. 1,459,583) for the EDSTROM MILWAUKEE WIS PAT 1-2-23 & 6-9-23 quick adjust wrench.

Cited as a reference in 2,724,301.

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