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GB Patent: GB-180,903,211
Differential screw threads
Patentee:
Edward Steers - London, England

USPTO Classifications:

Tool Categories:
industrial machines : industrial machine mechanisms

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: Mar. 01, 1809

Patent Pictures:
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Description:
The invention is a method using screw threads "by the screw and nut being made to revolve together either in the same or in a contrary direction. If they turn in the same direction, the one somewhat faster than the other, an increase of power is obtained; if in a contrary direction, there is an increase of motion produced."

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