Communication appliance operating device

Details Communication appliance operating device Communication appliance operating device

1975-11-24

1977-05-10

Caldwell, John W.

Communications: electrical

Systems

Call station

1791001C, 340223, 340328, 340272, G08B 2300

Patent

active

040231518

ABSTRACT:
A communication appliance is located to present predetermined information and is automatically turned on and off. A pair of switches are arranged to be actuated in sequence by a person approaching the communication appliance, and a control device responds to the proper sequence of operation of the switches to actuate the appliance to present the information to the person. The appliance can present an advertising message in a sales region or reminder messages to a person leaving a building. In one embodiment, there is a third switch, and a deenergizing tone is generated from a prerecorded tape.

REFERENCES:
patent: 2152296 (1939-03-01), Weis et al.
patent: 2595993 (1952-05-01), Templeman et al.
patent: 2783327 (1957-02-01), Luckey
patent: 3388390 (1968-06-01), Ciaschi
patent: 3509288 (1970-04-01), Leventhal
patent: 3644682 (1972-02-01), Parilla
patent: 3938120 (1976-02-01), O'Connell

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