Patent US4023089A successfully refreshed from Google Patents.
US4023089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Generator voltage control apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1975-09-30
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Granted: 1977-05-10
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Expires: 1995-09-30
Abstract
Abstract A generator voltage control apparatus includes a generator with a field coil and a battery which is charged by the output of the generator. A first transistor is provided for controlling the current passed through the field coil to maintain constant the voltage of the generator. A charge display lamp is connected in series to the first transistor. A second transistor is connected in parallel to the charge display lamp connected in series so that the second transistor is turned on by a voltage generated by the generator and is turned off by an overvoltage generated thereby.
Inventors
- 👤 Kenjiro Arakane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:02
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/16; H02J7/60; H02J7/64; H02J7/80; Y; Y10; Y10S; Y10S320/00; Y10S320/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
148 words
A generator voltage control apparatus comprising: a generator for generating an output voltage, the generator having a field coil and an output coil; a battery charged by the output of the generator, one terminal of the battery being connected to the output coil and also adapted for connection to one end of the field coil; a first transistor having an on state and an off state and connected to the other end of the field coil for controlling current passed through the field coil to maintain constant the voltage of the generator; a charge display lamp connected in series between the first transistor and the other terminal of the battery; and a second transistor having an on state and an off state and connected in parallel to the charge display lamp, the second transistor when in its on state forming a short circuit for the charge display lamp.
Claim 2
Dependent Claim
148 words
A generator voltage control apparatus comprising: a generator for generating an output voltage, the generator having a field coil and an output coil; a battery charged by the output of the generator, one terminal of the battery being connected to the output coil and also adapted for connection to one end of the field coil; a first transistor having an on state and an off state and connected to the other end of the field coil for controlling current passed through the field coil to maintain constant the voltage of the generator; a charge display lamp connected in series between the first transistor and the other terminal of the battery; and a second transistor having an on state and an off state and connected in parallel to the charge display lamp, the second transistor when in its on state forming a short circuit for the charge display lamp.
Claim 3
Dependent Claim
48 words
The generator voltage control apparatus according to claim 1 including constant voltage means actuatable by the generating of an output voltage in excess of a predetermined voltage by the generator for putting the first transistor in its off state to control the current path through the field coil.
Claim 4
Dependent Claim
39 words
The generator voltage control apparatus according to claim 1 including constant voltage means actuatable by the generating of an output voltage in excess of a predetermined voltage by the generator for putting the second transistor in its off state.
Claim 5
Dependent Claim
29 words
The generator voltage control apparatus according to claim 3 including self-sustaining circuit means for maintaining the off state of the second transistor after the constant voltage means is actuated.
Claim 6
Dependent Claim
200 words
A generator voltage control apparatus comprising: a generator for generating an output voltage, the generator having a field coil and an output coil; A battery which is charged by the output voltage of the generator, one terminal of the battery being connected to the output coil and also adapted for connection to one end of the field coil; A first transistor having an on state and an off state and connected in series to the other end of the field coil; first constant voltage means actuatable by the generating of an output voltage in excess of a predetermined voltage by the generator for putting the first transistor in its off state; a second transistor having an on state and an off state and connected between the first transistor and the other terminal of the battery; a charge display lamp connected in parallel to the second transistor; a third controllable transistor connected to the second transistor for putting the second transistor in its off state; and second constant voltage means actuatable by the generating of an output voltage in excess of the predetermined voltage by the generator for controlling the third transistor to put the second transistor in its off state.
Claim 7
Dependent Claim
200 words
A generator voltage control apparatus comprising: a generator for generating an output voltage, the generator having a field coil and an output coil; A battery which is charged by the output voltage of the generator, one terminal of the battery being connected to the output coil and also adapted for connection to one end of the field coil; A first transistor having an on state and an off state and connected in series to the other end of the field coil; first constant voltage means actuatable by the generating of an output voltage in excess of a predetermined voltage by the generator for putting the first transistor in its off state; a second transistor having an on state and an off state and connected between the first transistor and the other terminal of the battery; a charge display lamp connected in parallel to the second transistor; a third controllable transistor connected to the second transistor for putting the second transistor in its off state; and second constant voltage means actuatable by the generating of an output voltage in excess of the predetermined voltage by the generator for controlling the third transistor to put the second transistor in its off state.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |