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US Patent: 1,244,526
Valve Grinder
Patentees:
Louis G. Massicotte (exact or similar names) - Providence, RI
George C. Boswell (exact or similar names) - Danielson, CT

USPTO Classifications:
451/117, 81/484

Tool Categories:
specialty tools : valve grinding tools
screwdrivers

Assignees:
M-B Tool Co. - Providence, RI

Manufacturer:
M-B Tool Co. - Danielson, CT

Witnesses:
none listed

Patent Dates:
Applied: Apr. 26, 1916
Granted: Oct. 30, 1917

Patent Pictures:
Louis G. Massicotte and George C. Boswell patent Oct. 30, 1917
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Description:
Brace tool with adjustable "prongs" for use as engine valve grinder. The "prongs" can be retracted to clear the center bit for use as a screwdriver.

Advertised as the M-B No. 60 Adjustable Valve Grinder; No. 61 was a straight screwdriver with the same type of adjustable "prongs."

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