Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1986-04-15
1988-05-10
Shoop, Jr., William M.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
187130, B66B 114
Patent
active
047428937
ABSTRACT:
The invention concerns, first, a signalling procedure for a lift, whereby the control system and the users of the lift are informed on lift calls and the state of the lift, e.g. position, movement and availability, by using serial communication between the control system computer and the actuating and signalling means in the lift car and on each floor level, and, second, a signalling system applying the said procedure. To avoid abundant and complicated wiring and to increase standardization in the design of the lift system main panel and call button stations, the signalling system of the invention employs the polling principle in its internal communication, whereby data are transmitted bi-directionally using digital series loops, one of which connects the devices in the lift car, controlled by and communicating via a microprocessor, another connects the corresponding shaft and door devices, while a third loop is used for communication with the external world.
REFERENCES:
patent: 3456242 (1969-07-01), Lubkin et al.
patent: 3659271 (1972-04-01), Collins et al.
Ivanto Osmo
Kahkipuro Matti
Otala Matti
Sten Urpo
Blum Richard K.
Elevator GmbH
Shoop Jr. William M.
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