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US Patent: 1,241,659
Electric portable grinder
Patentee:
Emil Ritz, Jr. (exact or similar names) - Cincinnati, OH

USPTO Classifications:
310/75R, 310/90, 384/537, 451/294, 451/344, 451/358, 74/606R

Tool Categories:
handheld power tools : handheld grinders

Assignees:
Hisey-Wolf Machine Co. - Cincinnati, OH

Manufacturer:
Hisey-Wolf Machine Co. - Cincinnati, OH

Witnesses:
Unknown

Patent Dates:
Applied: May 14, 1917
Granted: Oct. 02, 1917

Patent Pictures:
USPTO (New site tip)
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Vintage Machinery entry for Hisey-Wolf Machine Co.
Description:
This design allows the shaft to be replaced with a shaft of a different length. "The difficulty in accomplishing this purpose is...in preventing quivering of the grinder shaft when it has any length at all, and hence the chattering of the grinder wheel itself."

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