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US Patent: 156,989
Improvement in Saw Grinding Machines
Patentee:
Henry Disston - Philadelphia, PA

USPTO Classifications:
451/143, 451/146

Tool Categories:
tool making : making sawblades
metalworking machines : grinders : surface grinders
woodworking machines : circular saws

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. H. Shoemaker
Hubert Howson

Patent Dates:
Applied: Aug. 07, 1874
Granted: Nov. 17, 1874

Patent Pictures: [ 1 | 2 ]
USPTO pdf tiff
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Description:
Circular saw grinding machine with a rotating table for the blade with two grindstones on opposite sides of the center of the blade. Grindstones can be angled.

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