US Patent: 506,261


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US Patent: 506,261

Wrench

Patentee:

Helfred John Rosenberg (exact or similar names) - St. Louis, MO

USPTO Classifications:

81/142, 81/177.1

Tool Categories:

wrenches : nut wrenches

wrenches : wrench adjustment types : quick adjust wrenches

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Applied:	Apr. 08, 1893
Granted:	Oct. 10, 1893

Patent Pictures:

Helfred John Rosenberg patent October 10, 1893

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Description:

The two sections slide in relation to each other in a dovetail slide; the "lower" section has rack teeth cut in one edge. A sliding toothed "dog" engages the rack teeth holds the adjustment.