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US Patent: 603,572
Wrench
Patentee:
Frederick Olsen - New York, NY

USPTO Classifications:
81/163, 81/165

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Percy C. Bowen
John L. Wilson
N. W. Johnston
C. E. Lane

Patent Dates:
Applied: Aug. 13, 1897
Granted: May 03, 1898

Patent Pictures:
Frederick Olsen patent May 3, 1898
USPTO pdf tiff
Google Patents
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Description:
An adjusting nut with left- and right-hand threads moves paired jaws that have extensions with rack teeth. Two alternate arrangements for the adjusting nut are shown and described.

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