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US Patent: 1,282,018
Valve Grinder
Patentee:
Frans O. Albertson - Sioux City, IA

USPTO Classifications:
451/115, 74/320, 74/402, 74/435, 74/74

Tool Categories:
specialty tools : valve grinding tools

Assignees:
Albertson & Co. - Sioux City, IA

Manufacturer:
Albertson & Co. - Sioux City, IA

Witnesses:
C. N. Jepson
Edwd. Pearson
Andrew Wintercom
Robert F. Bracke

Patent Dates:
Applied: Sep. 20, 1917
Granted: Oct. 22, 1918

Patent Pictures:
Frans O. Albertson patent Oct. 22, 1918
USPTO pdf tiff
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LITTLE SIOUX valve tool set ( from 1919 POPULAR MECHANICS )
Description:
The patent deals with internal details of construction of valve grinders with "progressively advancing oscillatory driven members." The internal gears are stamped parts.

The grinder using this patent was marketed as the "SIOUX," produced by Albertson & Co., Sioux City, Iowa. Advertising for the grinder and related tools included four patent dates: April 13, 1909 (pat. 918,049), May 21, 1912 (pat. RE13,421), this patent, and April 26, 1919 [sic] (pat. 1,301,891). The last patent is the valve refacer in the set.

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