US Patent: 272,408 - Tap Wrench


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US Patent: 272,408

Tap Wrench

Patentee:

Merritt S. Brooks (exact or similar names) - Chester, CT

USPTO Classifications:

408/240

Tool Categories:

wrenches : tap wrenches and die stocks

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Wm. Edgar Simonds

Albert C. Tanner

Wm. H. Marsh

Patent Dates:
Applied:	Dec. 08, 1882
Granted:	Feb. 20, 1883

Patent Pictures:

Merritt S. Brooks patent February 20, 1883

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Description:

The gripping jaws are hinged and the exterior edges threaded. The corresponding bore of the handle is also threaded. The direction of the threads is such that the jaws are tightened as the tap is driven into the work piece.