US3781633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle-carried storage battery charging device
Assignee: Denso Corp
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Filing: 1971-09-14
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Granted: 1973-12-25
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Expires: 1991-09-14
Abstract
Abstract A vehicle carried storage battery charging device has been provided which supplies D.C. electrical power through a rectifier circuit from an A.C. generator. A voltage regulator including a voltage detecting circuit controls the setting time of the generator in response to a voltage detecting circuit. A pilot lamp circuit receives a supply of current and is controlled by a first transistor which is in turn gated by a second transistor governed by the output of the generator. A second voltage detector circuit responsive to the battery voltage supplies the base current to the first transistor when the battery voltage exceeds a certain amount and a diode coupled between the first transistor and the lamp circuit supplies base current to the first transistor when the power source is disconnected from the battery, said base current through the first transistor causing same to become conductive to therby light up the pilot lamp circuit so as to indicate a malfunction.
Inventors
- 👤 K Iwaki
- 👤 K Mori
- 👤 M Ishihama
- 👤 Y Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:05
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/80
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
266 words
A vehicle-carried storage battery charging device for use in a storage battery, an A.C. generator, and a rectifier for supplying D.C. electrical power to the battery comprising: voltage regulating means having a power source terminal connected to the battery, a first voltage detecting circuit, including a first Zener diode connnected to said power source terminal for detecting the voltage applied thereto; and means connected between said first voltage detecting circuit and the field winding of the generator for controlling the exciting current of said generator in response to the output of said first voltage detecting circuit; a pilot lamp connected to said battery; a first transistor connected to said pilot lamp for controlling a current flowing through said pilot lamp; a second transistor connected to said first transistor and to an armature winding of said generator for rendering said first transistor nonconductive when said generator charges said battery; a second voltage detecting circuit including a second Zener diode and connected between said power source terminal of said voltage regulating means and said first transistor, for supplying a base current to said first transistor when the voltage across said battery exceeds a first predetermined value; a first diode connected between the base circuit of said first transistor and said pilot lamp for supplying a base current to said first transistor through said pilot lamp when said power source terminal is disconnected from said battery; and a second diode connected between said first and second transistors for preventing the base current to said first transistor supplied by said second voltage detecting circuit from flowing to said second transistor.
Claim 2
Dependent Claim
266 words
A vehicle-carried storage battery charging device for use in a storage battery, an A.C. generator, and a rectifier for supplying D.C. electrical power to the battery comprising: voltage regulating means having a power source terminal connected to the battery, a first voltage detecting circuit, including a first Zener diode connnected to said power source terminal for detecting the voltage applied thereto; and means connected between said first voltage detecting circuit and the field winding of the generator for controlling the exciting current of said generator in response to the output of said first voltage detecting circuit; a pilot lamp connected to said battery; a first transistor connected to said pilot lamp for controlling a current flowing through said pilot lamp; a second transistor connected to said first transistor and to an armature winding of said generator for rendering said first transistor nonconductive when said generator charges said battery; a second voltage detecting circuit including a second Zener diode and connected between said power source terminal of said voltage regulating means and said first transistor, for supplying a base current to said first transistor when the voltage across said battery exceeds a first predetermined value; a first diode connected between the base circuit of said first transistor and said pilot lamp for supplying a base current to said first transistor through said pilot lamp when said power source terminal is disconnected from said battery; and a second diode connected between said first and second transistors for preventing the base current to said first transistor supplied by said second voltage detecting circuit from flowing to said second transistor.
Claim 3
Dependent Claim
66 words
A vehicle-carried stOrage battery charging device according to claim 1, further comprising: a circuit, including a third diode and connected between said first voltage detecting circuit and said second transistor, for rendering said second transistor conductive to thereby turn off said first transistor when the voltage across said battery exceeds a second predetermined value and said voltage regulating means interrupts the exciting current of said generator.
Claim 4
Dependent Claim
231 words
A vehicle-carried storage battery charging device for use with a storage battery, an A.C. generator, a rectifier for supplying D.C. electric power to the battery comprising: voltage regulating means having a power source terminal connected to the battery; a first voltage detecting circuit, including a first Zener diode and connected to said power source terminal, for detecting the voltage applied thereto; and means, connected between said first voltage detecting circuit and the field winding of the generator, for controlling the exciting current of said generator in response to the output of said first voltage detecting circuit; a lamp circuit, including a pilot lamp and a current supplying circuit, for connecting said pilot lamp to said battery so as to supply said pilot lamp with a current therethrough; a first transistor, connected to said lamp circuit, for controlling the current flowing through said current supplying circuit for said pilot lamp; a second transistor, connected to said first transistor and to an armature winding of said generator, for rendering said first transistor nonconductive when said generator charges said battery; and a circuit, including a second diode and connected between said first voltage detecting circuit and said second transistor, for rendering said second transistor conductive to thereby turn off said first transistor when the voltage across said battery exceeds a predetermined value and said voltage regulating means interrupts the exciting current of said generator.
Claim 5
Dependent Claim
231 words
A vehicle-carried storage battery charging device for use with a storage battery, an A.C. generator, a rectifier for supplying D.C. electric power to the battery comprising: voltage regulating means having a power source terminal connected to the battery; a first voltage detecting circuit, including a first Zener diode and connected to said power source terminal, for detecting the voltage applied thereto; and means, connected between said first voltage detecting circuit and the field winding of the generator, for controlling the exciting current of said generator in response to the output of said first voltage detecting circuit; a lamp circuit, including a pilot lamp and a current supplying circuit, for connecting said pilot lamp to said battery so as to supply said pilot lamp with a current therethrough; a first transistor, connected to said lamp circuit, for controlling the current flowing through said current supplying circuit for said pilot lamp; a second transistor, connected to said first transistor and to an armature winding of said generator, for rendering said first transistor nonconductive when said generator charges said battery; and a circuit, including a second diode and connected between said first voltage detecting circuit and said second transistor, for rendering said second transistor conductive to thereby turn off said first transistor when the voltage across said battery exceeds a predetermined value and said voltage regulating means interrupts the exciting current of said generator.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |