Audio system for drive-in theaters

Details Audio system for drive-in theaters Audio system for drive-in theaters

1980-01-15

1981-12-22

Bookbinder, Marc E.

Telecommunications

Transmitter and receiver at separate stations

Single message via plural carrier wave transmission

455 56, 455 41, 455127, 179 1DD, H04H 110, H04B 360

Patent

active

043074669

ABSTRACT:
A drive-in theater having an array of predesignated parking spaces and a central audio output device for generating a carrierless audio signal. Interface devices are located at the spaces and connected in parallel to the output device. Each interface device includes an oscillator that generates a carrier signal and modulates the carrier signal in accordance with the audio input so that the modulated carrier signal can be transferred to the radio antenna of an individual automobile.

REFERENCES:
patent: 2979607 (1961-04-01), Herzfeld
patent: 3078348 (1963-02-01), McIntosh
patent: 3131351 (1964-04-01), Herzfeld
patent: 3579111 (1971-05-01), Johannessen
patent: 3980996 (1976-09-01), Greenspan
patent: 4047109 (1977-09-01), Sekiguchi

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