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US Patent: 1,250,512
Valve-Grinding Tool
Patentee:
Jacob B. Rose (exact or similar names) - Cleveland, OH

USPTO Classifications:
451/117, 74/70

Tool Categories:
specialty tools : valve grinding tools

Assignees:
Marvel Accessories Manufacturing Company - Cleveland, OH

Manufacturer:
Marvel Accessories Manufacturing Company - Cleveland, OH

Witnesses:
none listed

Patent Dates:
Applied: Dec. 04, 1916
Granted: Dec. 18, 1917

Patent Pictures:
Jacob B. Rose patent Dec. 18, 1917
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Description:
A swinging yoke actuated by the crank oscillates the shaft with the valve-engaging bit. Many of the parts are made of sheet metal stampings.

Marketed as the MARVEL JR. with a set of interchangeable bits by the Marvel Accessories Mfg. Co., Cleveland, OH.

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