The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 29, 1981
Filed:
Dec. 26, 1979
George F Schmoll, III, Mundelein, IL (US);
CBS Inc., New York, NY (US);
Abstract
A device for electronically modulating a musical tone signal to produce substantially the radiation effects produced by a rotary loudspeaker with the aid of two loudspeakers, in which circuit an amplitude modulator is associated with one loudspeaker and a variable delay device is associated with the other loudspeaker, the musical tone signal being applied to both the amplitude modulator and the variable delay device, and both the variable delay device and the amplitude modulator being modulated synchronously by a sub-audio frequency modulating signal. The amplitude modulator delivers an output to its loudspeaker only during positive half cycles of the modulating signal, during which time the frequency modulated signal produced by the variable delay device is going from sharp to flat, and during the period that no amplitude modulated tone signal is produced the frequency modulated signal is going from flat to sharp, whereby when the separately reproduced modulated signals are acoustically mixed a rotating sound effect is produced.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile