Drive-in theater audio system

Details Drive-in theater audio system Drive-in theater audio system

1978-04-06

1980-06-24

Morrison, Malcolm A.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

179 1B, 333124, 455 57, H04H 100

Patent

active

042096634

ABSTRACT:
A system for utilizing audio frequency wiring circuits at drive-in theaters to transmit radio frequency signals to patron automobile radio receivers with increased efficiency and a reduction in radiation of the radio frequency signals. The system employs impedance matching networks, coupling networks and termination networks to enable the audio frequency wiring circuits to operate as transmission lines.

REFERENCES:
patent: 1900106 (1933-03-01), Hamilton et al.
patent: 2914737 (1959-11-01), Tongue
patent: 2979607 (1961-04-01), Herzfeld
patent: 3428920 (1969-02-01), Oleksiak
patent: 3736374 (1973-05-01), Gargini

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