US3702901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Volume, balance and fader control for four channel sound system
Assignee: Motorola Solutions Inc
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Filing: 1970-12-22
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Granted: 1972-11-14
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Expires: 1990-12-22
Abstract
Abstract A volume, balance and fader control circuit is provided to control the translation of audio signals through a four channel audio system so that balancing of the output volume of the four channels is readily accomplished by a simple balance and fader control arrangement without causing changes in the total volume output of the four speakers. A single potentiometer is used for the left to right balance control and a second single potentiometer is used for the front to back fader control. The balance and fader potentiometers are operated to place the listener in the center of a surrounding field of sound without changing the total volume level of the four speakers.
Inventors
- 👤 James R Cherry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:42
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0082; H03G3/00; H03G3/02; H03G3/04; H04; H04S; H04S7/00; H04S7/30; H04S7/302; H04R; H04R2499/00; H04R2499/10; H04R2499/13; H04S2400/00; H04S2400/13; H04S3/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
301 words
A volume balance and fader control circuit for a four channel sound translating and reproducing system, including in combination, first, second,third and fourth sound signal translating channels, each for translating a different sound signal, each sound signal translating channel including a gain control device for varying the gain therein in response to a direct current potential applied thereto, and output speaker means for reproducing the sound, a volume control including variable resistance means for providing a selected direct current control potential, a balance control including a first potentiometer having an input and first and second outputs, said input being connected to said variable resistance means, said first output being connected to respective gain control devices in said first and second signal translating channels, and said second output being connected to respective gain control devices in said third and fourth sound signal translating channels, a fader control including a second potentiometer having an input and first and second outputs, said input being connected to said variable resistance means, said first output being connected to respective gain control devices in said first and third sound signal translating channels and said second output being connected to respective gain control devices in said second and fourth sound signal translating channels, whereby said variable resistance means of said volume control applies a selected direct current potential to each of said gain control devices to establish the overall gain of the four channel sound translating and reproducing system, and said first and second potentiometers of said balance and fader controls cooperate as a variable voltage divider for coupling said direct current potential from said volume control to each of said gain control devices to provide balance and fader control of the four channel sound translating and reproducing system without substantially affecting the overall gain of the system.
Claim 2
Dependent Claim
301 words
A volume balance and fader control circuit for a four channel sound translating and reproducing system, including in combination, first, second,third and fourth sound signal translating channels, each for translating a different sound signal, each sound signal translating channel including a gain control device for varying the gain therein in response to a direct current potential applied thereto, and output speaker means for reproducing the sound, a volume control including variable resistance means for providing a selected direct current control potential, a balance control including a first potentiometer having an input and first and second outputs, said input being connected to said variable resistance means, said first output being connected to respective gain control devices in said first and second signal translating channels, and said second output being connected to respective gain control devices in said third and fourth sound signal translating channels, a fader control including a second potentiometer having an input and first and second outputs, said input being connected to said variable resistance means, said first output being connected to respective gain control devices in said first and third sound signal translating channels and said second output being connected to respective gain control devices in said second and fourth sound signal translating channels, whereby said variable resistance means of said volume control applies a selected direct current potential to each of said gain control devices to establish the overall gain of the four channel sound translating and reproducing system, and said first and second potentiometers of said balance and fader controls cooperate as a variable voltage divider for coupling said direct current potential from said volume control to each of said gain control devices to provide balance and fader control of the four channel sound translating and reproducing system without substantially affecting the overall gain of the system.
Claim 3
Dependent Claim
64 words
The volume balance and fader control circuit of claim 1 further including a transistor connected in circuit with each of said first, second, third and fourth sound signal translating channels, each transistor having the collector-emitter junction thereof connected in series with respective signal translating channel and ground potential and the base electrode of said transistors being coupled to said first and second potentiometer means.
Claim 4
Dependent Claim
34 words
The volume balance and fader control circuit of claim 2 further including a fixed resistor connected in series between said first and second potentiometer means and the base electrodes of the transistors connected thereto.
Claim 5
Dependent Claim
83 words
The volume balance and fader control circuit of claim 1 further including a first lever connected to said first potentiometer means, said first lever being movable back and forth in a first plane, and a second lever connected to said second potentiometer means said second lever being movable back and forth in a plane perpendicular to said first plane, said first and second levers being adjusted to effect a desired balancing condition of said first, second, third and fourth sound signal translating channels.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |