1975-12-19
1977-05-31
Griffin, Robert L.
179 1VE, 325 16, 325303, 325311, H04B 116
Patent
active
040272494
ABSTRACT:
This is a self-contained control unit for use in an automobile or other vehicle which has a citizens band radio receiver and an additional audio entertainment appliance, such as an AM radio, FM radio, AM/FM radio, or an audio magnetic tape player. The control unit includes an external speaker for the CB receiver, a plug for insertion in a jack on the CB receiver to connect the external speaker to it, a relay for controlling the operation of the additional audio entertainment appliance, and a transistor amplifier and switching circuit connected between the plug and the relay to disable the additional audio entertainment appliance whenever the CB receiver is broadcasting incoming CB signals through the external speaker. The switching circuit includes a time delay arrangement which delays turning on the additional audio entertainment appliance after the incoming CB signal has stopped.
REFERENCES:
patent: 3277374 (1966-10-01), Kobayashi
patent: 3493681 (1970-02-01), Richards
patent: 3725942 (1973-04-01), Ukmar
Bookbinder Marc L.
Griffin Robert L.
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