Elevator control

Details Elevator control Elevator control

1982-11-17

1986-06-10

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

340 19R, 340 20, B66B 302

Patent

active

045945705

ABSTRACT:
An operational controller is located in the elevator car, and a mobile transceiver, also located in the car, is connected to the operational controller, which includes a microprocessor that controls the transceiver. A stationary transceiver is located in the lobby, and the two transceivers are connected over two pairs of wires in the traveling cable. These transceivers communicate by dual tone combinations, each combination identifying a hall button, a hall lantern, and a position indicator in the lobby.

REFERENCES:
patent: 3782504 (1974-01-01), Billmaier et al.
patent: 4376930 (1983-03-01), Sasso

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