Patent US3747102A successfully refreshed from Google Patents.
Patent US5130665A successfully refreshed from Google Patents.
US5130665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audio volume level control
Assignee: Individual
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Filing: 1991-02-14
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Granted: 1992-07-14
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Expires: 2011-02-14
Abstract
Abstract An audio volume controller includes a variable gain amplifier which amplifies an audio signal and drives a sound transducer such as a loud speaker. A volume controller is responsive to the level of the audio signal to adjust the gain of the amplifier to maintain the level of sound reproduced by the speaker between manually adjustable minimum and maximum values. A second minimum level control is provided to set a predetermined minimum audio signal level below which the gain of the amplifier is not increased in an attempt to maintain the sound level above the manually adjusted level.
Inventors
- 👤 Richard L. Walden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:06
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/3005; H03G3/02; H03G3/04; H03G7/00; H03G7/002
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
128 words
A method of controlling the level of sound produced by a sound transducer, comprising the steps of amplifying an input signal having an amplitude which varies at an audio frequency rate and driving said transducer with the amplified signal to produce sound, manually setting a minimum sound level to be produced by said transducer in response to said amplified signal, manually setting a maximum sound level to be produced by said transducer in response to said amplified signal independently of said setting of said minimum sound level, and controlling the level of amplification of said input signal to maintain the level of sound produced by said sound transducer between said minimum and maximum levels when the audio level of said input signal is above a predetermined threshold value.
Claim 2
Independent Claim
128 words
A method of controlling the level of sound produced by a sound transducer, comprising the steps of amplifying an input signal having an amplitude which varies at an audio frequency rate and driving said transducer with the amplified signal to produce sound, manually setting a minimum sound level to be produced by said transducer in response to said amplified signal, manually setting a maximum sound level to be produced by said transducer in response to said amplified signal independently of said setting of said minimum sound level, and controlling the level of amplification of said input signal to maintain the level of sound produced by said sound transducer between said minimum and maximum levels when the audio level of said input signal is above a predetermined threshold value.
Claim 3
Independent Claim
97 words
A method of controlling the level of sound produced by a sound transducer, comprising the steps of amplifying an input signal having an amplitude which varies at an audio frequency rate and driving said transducer sound with the amplified signal, manually setting the minimum level of sound to be produced by said sound transducer in response to said amplified signal, and controlling the level of amplification of said input signal to maintain the level of sound produced by said transducer above said minimum level when the audio level of said signal is above a predetermined threshold value.
Claim 4
Independent Claim
97 words
A method of controlling the level of sound produced by a sound transducer, comprising the steps of amplifying an input signal having an amplitude which varies at an audio frequency rate and driving said transducer sound with the amplified signal, manually setting the minimum level of sound to be produced by said sound transducer in response to said amplified signal, and controlling the level of amplification of said input signal to maintain the level of sound produced by said transducer above said minimum level when the audio level of said signal is above a predetermined threshold value.
Claim 5
Independent Claim
81 words
A method of controlling the level of sound produced by a transducer, comprising the steps of amplifying an input signal having an amplitude which varies at an audio frequency rate and driving said transducer with the amplified signal, manually setting the maximum level of sound to be produced by said transducer in response to said amplified signal, and controlling the level of amplification of said input signal to maintain the level of sound produced by said transducer below said maximum level.
Claim 6
Independent Claim
81 words
A method of controlling the level of sound produced by a transducer, comprising the steps of amplifying an input signal having an amplitude which varies at an audio frequency rate and driving said transducer with the amplified signal, manually setting the maximum level of sound to be produced by said transducer in response to said amplified signal, and controlling the level of amplification of said input signal to maintain the level of sound produced by said transducer below said maximum level.
Claim 7
Dependent Claim
106 words
A volume controller, comprising in combination variable gain amplifier means for amplifying an audio signal, sound transducer means responsive to the output of said amplifier means for producing sound corresponding to the amplified audio signal, means for setting a minimum audio signal level, means for setting a maximum audio signal level, means responsive to said audio signal for increasing the gain of said amplifier means when said amplified audio signal is less than said minimum audio signal level, and means responsive to said audio signal for decreasing the gain of said amplifier means when said amplified audio signal is greater than said maximum audio signal level.
Claim 8
Dependent Claim
106 words
A volume controller, comprising in combination variable gain amplifier means for amplifying an audio signal, sound transducer means responsive to the output of said amplifier means for producing sound corresponding to the amplified audio signal, means for setting a minimum audio signal level, means for setting a maximum audio signal level, means responsive to said audio signal for increasing the gain of said amplifier means when said amplified audio signal is less than said minimum audio signal level, and means responsive to said audio signal for decreasing the gain of said amplifier means when said amplified audio signal is greater than said maximum audio signal level.
Claim 9
Dependent Claim
23 words
A volume controller according to claim 4, further comprising manually settable means for simultaneously setting both said minimum and maximum audio signal levels.
Claim 10
Dependent Claim
28 words
A volume controller according to claim 4, further comprising manually operable enable/disable means for enabling or disabling said means for setting said minimum and maximum audio signal levels.
Claim 11
Dependent Claim
47 words
A volume controller according to claim 4, further comprising third means for setting a minimum threshold signal level below which the gain of said variable gain amplifier is not increased when the level of said audio signal falls below said minimum level set by said first means.
Claim 12
Dependent Claim
28 words
The method according to claim 1 further comprising the step of manually adjusting the sound level produced by said sound transducer between said minimum and maximum sound levels.
Claim 13
Dependent Claim
28 words
A volume controller according to claim 4, further comprising manually operable means for adjusting the level of said audio signal between said minimum and maximum audio signal levels.
References Cited (Backward Citations)
US4320254A
Cited
US4792977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-14 | 1996-01-13 | 1996-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-14 | 2000-01-13 | 2000-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-14 | 2004-01-13 | 2004-07-14 | $7700.00 | Window Closed / Lapsed |