US Patent: 368,563 - Micrometer Pipe Gage


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US Patent: 368,563

Micrometer Pipe Gage

Patentee:

David G. Brown (exact or similar names) - Philadelphia, PA

USPTO Classifications:

33/827

Tool Categories:

metalworking tools : machinist tools : measuring tools : micrometers

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Charles H. Pell

Frederick F. Campbell

Patent Dates:
Applied:	Mar. 18, 1885
Granted:	Aug. 16, 1887

Patent Pictures:

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Description:

The object of this invention is to provide a device adapted to measure the inside diameters or the differences in the dimensions of two or more diameters of a pipe or cylinder with increased exactness or accuracy.