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US Patent: 432,409
Wrench
Patentee:
John  Hull - Elkhart, IN

USPTO Classifications:
81/100, 81/129.5

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

Assignees:
John  Hull - Elkhart, IN
Zachariah Robinson - Elkhart, IN

Manufacturer:
Not known to have been produced

Witnesses:
E. P. Ellis
L. J. Magie
Geo. H. Fister
James H. State

Patent Dates:
Applied: Nov. 04, 1889
Granted: Jul. 15, 1890

Patent Pictures:
John Hull patent July 15, 1890
USPTO pdf tiff
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Description:
Quick-adjust nut wrench with a sliding jaw having rack teeth on the inner edge of the shank. The jaw slides through an opening in the shank. The back lip of this opening has a single tooth-like spur, and the opening allows the sliding jaw to rock back. A leaf spring holds the movable jaw against the spur. This construction allows the jaw to "ratchet" on square nuts.

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