US4385240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audio device for motor vehicle
Assignee: Olympus Corp
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Filing: 1981-03-26
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Granted: 1983-05-24
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Expires: 2001-03-26
Abstract
Abstract An audio device for motor vehicles includes a first battery which supplies power to an automobile, and a second battery arranged to be charged by the first battery when the output voltage of the second battery falls to a certain value. A switching arrangement operates to uncouple the second battery from the first battery, and to connect noise sensitive load circuits to the second battery, exclusively, when a cassette or cartridge is loaded into a cassette loading portion of the device. Accordingly, the noise sensitive load circuits are removed from the influence of electrical noise introduced on the power supply lead of the first battery through operation of the automobile.
Inventors
- 👤 Masaaki Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:53
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/1423; B; B60; B60Q; B60Q11/00; B60Q11/002; H02J2105/00; H02J2105/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
An audio device for motor vehicles comprising, a first battery including a power supply lead for supplying electrical power to an automobile, a second battery, charging means for recharging the second battery by coupling the first battery to the second battery, a number of sensitive load circuits whose operations are subject to the influence of automotive electrical noise produced on the power supply lead of the first battery, a number of unsensitive loads whose operations are unaffected by automotive electrical noises, switch means for uncoupling the second battery from the first battery and for coupling the sensitive load circuits to the second battery to remove the sensitive load circuits from the influence of electrical noise on the power supply lead of the first battery, said unsensitive loads being arranged to remain coupled to the first battery when the sensitive load circuits are coupled to the second battery by said switch means.
Claim 2
Dependent Claim
151 words
An audio device for motor vehicles comprising, a first battery including a power supply lead for supplying electrical power to an automobile, a second battery, charging means for recharging the second battery by coupling the first battery to the second battery, a number of sensitive load circuits whose operations are subject to the influence of automotive electrical noise produced on the power supply lead of the first battery, a number of unsensitive loads whose operations are unaffected by automotive electrical noises, switch means for uncoupling the second battery from the first battery and for coupling the sensitive load circuits to the second battery to remove the sensitive load circuits from the influence of electrical noise on the power supply lead of the first battery, said unsensitive loads being arranged to remain coupled to the first battery when the sensitive load circuits are coupled to the second battery by said switch means.
Claim 3
Dependent Claim
98 words
An audio device for motor vehicles comprising, a first battery including a power supply lead for supplying electrical power to an automobile, a second battery, charging means for recharging the second battery by coupling the first battery to the second battery, a number of load circuits, switch means for uncoupling the second battery from the first battery and for coupling the load circuits to the second battery, and a cassette loading portion for receiving a cassette including a recording medium, wherein said switch means is interlocked to operate upon loading of a cassette into the cassette loading portion.
Claim 4
Dependent Claim
98 words
An audio device for motor vehicles comprising, a first battery including a power supply lead for supplying electrical power to an automobile, a second battery, charging means for recharging the second battery by coupling the first battery to the second battery, a number of load circuits, switch means for uncoupling the second battery from the first battery and for coupling the load circuits to the second battery, and a cassette loading portion for receiving a cassette including a recording medium, wherein said switch means is interlocked to operate upon loading of a cassette into the cassette loading portion.
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) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |