US4162372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for electronically generating the radiation effects produced by a rotary loudspeaker
Assignee: US Philips Corp
•
Filing: 1977-11-10
•
Granted: 1979-07-24
•
Expires: 1997-11-10
Abstract
Abstract A device for electronically simulating vibrato, chorus, and pseudostereo effects and the radiation effects produced by a rotary loudspeaker with the aid of two loudspeakers or loudspeaker combinations, in which device a controllable amplifier is associated with each loudspeaker, the audio signal being applied to these amplifiers both directly and via a delay means, and both the delay and the gain of the amplifiers being varied synchronously by a subaudio-frequency generator.
Inventors
- 👤 Ulrich Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:13
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; G10H1/04; G10H1/043; H; H04; H04R; H04R3/00; H04R3/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
A circuit for electronically generating the radiation effects produced by a rotary loudspeaker for use with two loudspeakers, said circuit comprising means for generating a subaudio frequency signal; a variable delay means having signal input means for receiving an audio signal, control input means for receiving said subaudio frequency signal and for varying the delay thereof, and an output means for providing a delayed signal; two amplifiers each having a signal input means for jointly receiving said audio and delayed signals, a gain control input means for receiving said subaudio frequency signal in phase opposition respectively, and an output adapted to be coupled to said loudspeakers respectively; and a phase inverter coupled between said gain control input means.
Claim 2
Dependent Claim
118 words
A circuit for electronically generating the radiation effects produced by a rotary loudspeaker for use with two loudspeakers, said circuit comprising means for generating a subaudio frequency signal; a variable delay means having signal input means for receiving an audio signal, control input means for receiving said subaudio frequency signal and for varying the delay thereof, and an output means for providing a delayed signal; two amplifiers each having a signal input means for jointly receiving said audio and delayed signals, a gain control input means for receiving said subaudio frequency signal in phase opposition respectively, and an output adapted to be coupled to said loudspeakers respectively; and a phase inverter coupled between said gain control input means.
Claim 3
Dependent Claim
32 words
A circuit as claimed in claim 1, further comprising a low-pass filter coupled between the subaudio-frequency generator and one of the gain control inputs of the controllable amplifiers and said phase inverter.
Claim 4
Dependent Claim
14 words
A circuit as claimed in claim 2, wherein said filter comprises a resistance-capacitance filter.
Claim 5
Dependent Claim
16 words
A circuit as claimed in claim 2, wherein said filter has a one Hertz cut-off frequency.
Claim 6
Dependent Claim
16 words
A circuit as claimed in claim 4, wherein said subaudio signal has a 0.7 Hertz frequency.
Claim 7
Dependent Claim
16 words
A circuit as claimed in claim 1, wherein said subaudio signal has a 0.7 Hertz frequency.
References Cited (Backward Citations)
US4008641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-23 | 1983-01-22 | 1983-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-23 | 1987-01-22 | 1987-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-23 | 1991-01-22 | 1991-07-24 | $7700.00 | Window Closed / Lapsed |