1978-08-08
1980-04-01
Olms, Douglas W.
179 1GQ, H04R 500
Patent
active
041963148
ABSTRACT:
Apparatus is disclosed for cyclically communicating an audio electrical signal to a plurality of sound-reproducing elements in sequential, serial fashion. One embodiment includes a number of make-or-break type of electrical switches, one for each sound-reproducing element, operably situated about and in engagement with the periphery of a rotating cam element. Each switch has an input terminal, to which is applied the audio electrical signal, and an output terminal that is coupled to the sound-reproducing element associated therewith. Rotation of the cam element sequentially makes and breaks each switch to alternately establish and interrupt communication of the audio electrical signal to the associated sound-reproducing element. Another embodiment includes a digital counter operably coupled to a number of transistor switches that are selectively caused to conduct. Transistor switch conduction interconnects an input terminal receiving the audio electrical signal to the sound-reproducing element associated with the transistor switch.
REFERENCES:
patent: 3299208 (1967-01-01), Driemeyer
patent: 3757046 (1973-09-01), Williams
patent: 3873779 (1975-03-01), Wedan
patent: 3982071 (1976-09-01), Weiss et al.
patent: 4002836 (1977-01-01), Gardner
patent: 4048442 (1977-09-01), Mannila et al.
patent: 4105865 (1978-08-01), Guillory
patent: 4112255 (1978-09-01), Draw
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