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US Patent: 319,215
Spring Calipers
Patentee:
Charles P. Fay (exact or similar names) - Springfield, MA

USPTO Classifications:
33/558.1, 74/526

Tool Categories:
gauges
layout tools : compasses : dividers

Assignees:
None

Manufacturer:
L. S. Starrett Co. - Athol, MA

Witnesses:
H. A. Chapin
Wm. H. Chapin

Patent Dates:
Applied: Jan. 05, 1885
Granted: Jun. 02, 1885

Patent Pictures: [ 1 | 2 ]
Image (c) and courtesy of Beau Harris, American Precision Museum, www.americanprecision.org
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"Vintage Machinery" entry for L. S. Starrett Co.
Description:
Object is to provide an improved spring caliper with a "knockdown" feature that allows the spring to be removed and used interchangeably with other caliper legs.

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