US Patent: 211,096 - Improvement in grindstone-frames


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US Patent: 211,096

Improvement in grindstone-frames

Patentee:

Joseph E. Hoppen (exact or similar names) - Newark, NJ

USPTO Classifications:

451/361

Tool Categories:

metalworking machines : grinders : grindstone frames

Assignees:

None

Manufacturer:

J. E. Hoppen - New York, NY

Witnesses:

J. F. Hoppen

W. F. Hattersley

Patent Dates:
Applied:	Jul. 02, 1877
Granted:	Jan. 07, 1879

Patent Pictures:

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Vintage Machinery entry for J. E. Hoppen

Description:

The innovations are an adjustable water-trough that can be raised or lowered to fit the diameter of the stone, and a foot pedal that can be positioned on either side of the frame.