US Patent: 447,475 - Drill and Tap Scale


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US Patent: 447,475

Drill and Tap Scale

Patentee:

Bennard H. Pomeroy (exact or similar names) - New York, NY

USPTO Classifications:

33/201, 33/555.2

Tool Categories:

gauges

Assignees:

Pomeroy Machine Co. - Brooklyn, NY

Manufacturer:

Not known to have been produced

Witnesses:

E. T. Thomas

Wm. E. Johnson

Patent Dates:
Applied:	Jan. 27, 1891
Granted:	Mar. 03, 1891

Patent Pictures: [ 1 | 2 ]

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Description:

Either linear or circular scale which includes tap size, tap drill size, clearance drill size, and a tapering scale for use in determining drill size.