Elevator – industrial lift truck – or stationary lift for vehicle – With barrier for regulating access to load support – Includes motor or motor driven linkage for shifting barrier
Patent
1993-12-06
1995-08-22
Stephan, Steven L.
Elevator, industrial lift truck, or stationary lift for vehicle
With barrier for regulating access to load support
Includes motor or motor driven linkage for shifting barrier
187391, B66B 1322
Patent
active
054431425
ABSTRACT:
An automatic elevator system having car movement controls, door controls, a door operating mechanism for automatically opening and closing at least the car door and first switch contacts operable when the car and hoistway doors are closed to permit the car to move from a floor in combination with further switch contacts which are operable in accordance with the positions of the doors and which prevent the car from moving from a floor when the first switch contacts are operated before the further switch contacts to prevent movement of the car from a floor when the first switch contacts have been operated or shunted by unauthorized persons or by a short circuit and other means to protect against failures of other circuits operated by the first switch means and further switch means.
REFERENCES:
patent: 1680771 (1928-08-01), Davis
patent: 1876438 (1932-09-01), Werner
patent: 1929391 (1933-10-01), Liebenberg
patent: 2019456 (1935-10-01), Liebenberg
patent: 2185748 (1940-01-01), Kebelman
patent: 2432293 (1947-12-01), Giovanni
patent: 4108281 (1978-08-01), Glaser
patent: 4750591 (1988-06-01), Coste et al.
patent: 5107964 (1992-04-01), Coste et al.
G.A.L. Manufacturing Corp.
Nappi Robert
Stephan Steven L.
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