US Patent: 520,019 - Grinding-machine


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US Patent: 520,019

Grinding-machine

Patentee:

Robert Howard Grant (exact or similar names) - Fitchburg, MA

USPTO Classifications:

451/284

Tool Categories:

metalworking machines : grinders

Assignees:

Grant Anti-Friction Ball Co. - Fitchburg, MA

Manufacturer:

Cleveland Machine Screw Co. - Cleveland, OH

Grant Anti-Friction Ball Co. - Fitchburg, MA

Witnesses:

E. H. Gilman

William B. H. Dowse

Patent Dates:
Applied:	Nov. 29, 1892
Granted:	May 15, 1894

Patent Pictures:

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Vintage Machinery entry for Cleveland Automatic Machine Co.

Description:

In November 1893, the Grant Anti-Friction Ball Co. was acquired by the Cleveland Machine Screw Co., which subsequently advertised, "Steel Balls for all Anti-Friction Purposes. Bicycle balls a specialty. Sole Owners of the RICHARDSON-GRANT System of Grinding. Also the N. SAWYER Hardening Process. Present Capacity, 1,000,000 Per Month." The statements about the Richardson-Grant and N. Sawyer processes are taken verbatim from early ads by Grant Anti-Friction Ball Co.