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US Patent: 145,488
Grinding Machines
Patentee:
Perley D. Cummings - Portland, ME

USPTO Classifications:
408/72R, 82/150

Tool Categories:
metalworking machines : grinders

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
William Henry Clifford
C. F. Washburn
Frank H. Jordan
Edwin W. Haskett

Patent Dates:
Applied: Aug. 25, 1873
Granted: Dec. 16, 1873

Patent Pictures:
USPTO pdf tiff
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Description:
The object of my invention is to produce a machine for grinding tools, iron, wood, and other substances. It consists of a rim or annulose wheel rotating upon a proper shaft, in combination with supports or brackets and an outer rim or band. It also consists of the combination of the rim-wheel with an inner bed or table.

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