Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1979-07-27
1981-03-31
Truhe, J. V.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
B66B 130
Patent
active
042588294
ABSTRACT:
An elevator system having an elevator car operable in the up and down travel directions in a selected one of first and second speed modes. The elevator system develops a bi-directional speed pattern signal from a selected one of first and second unidirectional speed pattern input signals, with the polarity of the bi-directional speed pattern signal being responsive to the selected travel direction. su
REFERENCES:
patent: 3860093 (1975-01-01), Mitsui et al.
patent: 3891064 (1975-06-01), Clark
Duncanson Jr. W. E.
Lackey D. R.
Truhe J. V.
Westinghouse Electric Corp.
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