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US Patent: 613,230
Wrench
Patentee:
Frank W. Beckwith (exact or similar names) - Chicago, IL

USPTO Classifications:
403/52, 81/165, 81/173, 81/177.1

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

Assignees:
Frank W. Beckwith - Chicago, IL
Henry W. Fairbanks - Chicago, IL

Manufacturer:
Not known to have been produced

Witnesses:
Dorothy Barstow
Sew. E. Curtis
E. S. Evarts
L. E. Curtis
Patent Dates:
Applied: Nov. 04, 1897
Granted: Nov. 01, 1898

Patent Pictures:
Frank W. Beckwith patent November 1, 1898
USPTO (New site tip)
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Description:
The adjusting mechanism has a main adjusting nut and a secondary lock nut to keep the adjustment from shifting.

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