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US Patent: 81,967
Improvement in double ratchet-lever power
Patentee:
John S. Williams - Chicago, IL

USPTO Classifications:
74/43

Tool Categories:
woodworking machines : woodworking machine mechanisms
woodworking machines : human powered machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. Hayward
G. L. Chapin

Patent Dates:
Granted: Sep. 08, 1868

Patent Pictures:
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Description:
Invention is a foot-treadle mechanism for driving a circular saw, lathe, churn, or other device needing a rotational motion. The patent drawing shows a circular saw, which is also the first application mentioned in the patent specification.

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