US Patent: 81,967 - Improvement in double ratchet-lever power


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US Patent: 81,967

Improvement in double ratchet-lever power

Patentee:

John S. Williams (exact or similar names) - 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.