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US Patent: 241,879
Gear Wheel Cutter
Patentee:
Edwin L. Parsons - Providence, RI

USPTO Classifications:
407/29

Tool Categories:
metalworking machines : milling machines : milling machine cutters

Assignees:
Brown & Sharpe Mfg. Co. - Providence, RI

Manufacturer:
Brown & Sharpe Mfg. Co. - Providence, RI

Witnesses:
John E. Hall
Samuel Darling
George H. Smith

Patent Dates:
Applied: Mar. 23, 1881
Granted: May 24, 1881

Patent Pictures:
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"Vintage Machinery" entry for Brown & Sharpe Mfg. Co.
Description:
Abstract:

The object of my invention is to set the cutter in the gear-cutting machine central with the spindle upon which the blank is held; and it consists in making a small line about two one-thousandths of an inch in width, (0.002,) more or less, in the center of the peripherical contour of one or more teeth of the cutter, transverse with its axis; or a conical or some other form of groove or mark may be used instead of a small line. Heretofore the eye has been the principal guide in seating gear-wheel cutters. The points of the cutter-teeth being rounding, the center cannot be found with a graduated rule or dividers, and it would be too difficult and expensive, if practicable, to make an instrument to fit and accompany each size cutter to be used as a guide in setting it. It is well known that there is a great difference in the natural faculty of mechanics for doing such work by the eye. Some can work quite accurately, while others cannot depend upon their eye for anything accurate.

Claim:

A gear-wheel cutter having a line in the center of the peripherical contour of one or more of its teeth as a guide in setting the cutter central in the gear-cutting machine.

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