US Patent: 66,692 - Improvement in saws


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US Patent: 66,692

Improvement in saws

Patentee:

James E. Emerson (exact or similar names) - Trenton, NJ

USPTO Classifications:

83/850

Tool Categories:

woodworking machines : circular saws : saw teeth

woodworking machines : machine and tool cutters : saw teeth

Assignees:

None

Manufacturer:

American Saw Co. - Trenton, NJ

Witnesses:

Charles A. Pettit

Charles D. Smith

Patent Dates:
Granted:	Jul. 16, 1867

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for James E. Emerson; American Saw Co.

Description:

An advertorial in the 1868-02-01 issue of Scientific American features this invention, complete with four engravings.

The principle of this invention is that below each gullet there is a series of semi-circular holes. When a tooth is sharpened, the gullet is filed down to the next semi-circular hole. The semi-circle defines the bottom of the gullet, avoiding the stress concentration of a sharp gullet. This innovation was heavily promoted by the American Saw Co.