Elevator – industrial lift truck – or stationary lift for vehicle – Having specific load support drive-means or its control – Includes control for power source of drive-means
Patent
1994-06-03
1995-12-19
Wong, Peter S.
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific load support drive-means or its control
Includes control for power source of drive-means
187316, 187393, B66B 128, B66B 502, B66B 1300
Patent
active
054761573
ABSTRACT:
An elevator control system (40) for automatically controlling the operation of an elevator car (22A) having a car door (24A) in which the elevator moves between different floor levels of an elevator shaft (30A) in which each floor level has associated hoistway doors (26A, 26C) for providing access to the elevator car (22A) in the shaft (30A) and an elevator hoistway operation monitoring system (34) with individual floor monitoring switches (32) for determining the floor level location of the elevator car (22A), individual hoistway door monitoring sensors (38) for sensing the opening of a hoistway door (26A) relays (56, 58, 52) and contact (50) coupled with an elevator safety circuit (42) for automatically preventing the elevator car (22A) from moving if a hoistway door (26A) is opened at a floor level other than the floor level at which the elevator car (22A) is located and for prohibiting the car (22A) from moving in response to the closing of the opened hoistway door (26A).
REFERENCES:
patent: 1973920 (1934-09-01), Wilson
patent: 3461422 (1969-08-01), Hansen
patent: 4108281 (1978-08-01), Glaser
patent: 4367810 (1983-01-01), Doane et al.
patent: 4898263 (1990-02-01), Manske et al.
patent: 5025895 (1991-06-01), Leone et al.
Nappi Robert
Wong Peter S.
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