US Patent: 824,975 - Centering Device


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US Patent: 824,975

Centering Device

Patentee:

Edward L. Cook (exact or similar names) - Brattleboro, VT

USPTO Classifications:

33/673

Tool Categories:

layout tools : marking gauges : center marking gauges

Assignees:

None

Manufacturer:

Goodell-Pratt Co. - Greenfield, MA

Witnesses:

Patent Dates:
Applied:	Sep. 09, 1905
Granted:	Jul. 03, 1906

Patent Pictures: [ 1 | 2 ]

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"Vintage Machinery" entry for Goodell-Pratt Co.

Description:

This tool uses three hinged arms to accurately mark the center of a shaft or rectangle.

The production tool differs from the patent drawing in that it does away with the angled arm, and moves the locking screw to the center arm. It works just the same, but would be easier to produce.

The Goodell-Pratt Catalog No. 17, from 1930, lists this patent date on page 325 for their Universal Center Finders, Nos. 341, 342, and 343.