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US Patent: 476,767
Wrench
Patentee:
Albert K. Lovell - Jackson, MI

USPTO Classifications:
81/172, 81/DIG3

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

Assignees:
None

Manufacturer:
A. K. Lovell Wrench Co. - New York, NY

Witnesses:
F. L. Lovell
Jos. H. Johnson
F. Clough
L. W. Bradford

Patent Dates:
Applied: Sep. 25, 1891
Granted: Jun. 07, 1892

Patent Pictures:
Albert K. Lovell Pat. Jun. 7, 1892
USPTO pdf tiff
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Description:
The quick adjust mechanism has a vertically ribbed ring at the botton of a steep spiral screw engaging a pin in the moveable jaw. When the spring catch locking the position of the ribbed ring is released, the movable jaw can be slid into position, and the adjusting spiral turns. Known examples are well made and highly prized by collectors.

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