US3660752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric voltage regulator arrangement
Assignee: Robert Bosch GmbH
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Filing: 1970-03-13
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Granted: 1972-05-02
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Expires: 1990-03-13
Abstract
Abstract A permanent magnet alternating current generator has an incandescent bulb connected across the full-wave rectifier which furnishes a D.C. current to a load. The incandescent bulb varies the resistance of the photo resistor. A sufficient change in the resistance of the photo resistor causes the conduction of a transistor which in turn causes conduction of a triac which is connected in parallel with one of the two series connected output windings of the generator. When the triac becomes conductive, it short circuits the winding, lowering the output voltage, thus in turn causing the incandescent lamp to emit less light, varying the photo resistance to block the transistor and open the triac.
Inventors
- 👤 Peter Pfeffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:32
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/1469; H02J7/1492; Y; Y02; Y02T; Y02T10/00; Y02T10/80; Y02T10/92; Y10; Y10S; Y10S323/00; Y10S323/902
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
208 words
Voltage regulator arrangement for an alternating current generator having an output winding, comprising, in combination, rectifier means connected to said output winding for furnishing a direct current voltage to a direct current load at a first and second output terminal; bidirectional thyristor switching means directly connected in parallel with part of said output winding, said bidirectional thyristor switching means having a gate and changing substantially from infinite impedance to substantially zero impedance upon receipt of a control signal at said gate; and control signal furnishing means for furnishing said control signal when the amplitude of said direct current voltage exceeds a predetermined amplitude, said control signal furnishing means comprising voltage divider means having a photoresistance and having a voltage divider tap, connected from said first to said second output terminal; illuminating means connected in parallel with said voltage divider means, mounted in operative proximity to said photoresistance means, the light emitted by said illuminating means varying as a function of said direct current voltage; transistor means having an emitter-collector circuit and a base; means connecting said emitter-collector circuit from said first output terminal to said gate of said bidirectional thyristor switching means; and Zener diode means connecting said base of said transistor means to said voltage divider tap.
Claim 2
Dependent Claim
208 words
Voltage regulator arrangement for an alternating current generator having an output winding, comprising, in combination, rectifier means connected to said output winding for furnishing a direct current voltage to a direct current load at a first and second output terminal; bidirectional thyristor switching means directly connected in parallel with part of said output winding, said bidirectional thyristor switching means having a gate and changing substantially from infinite impedance to substantially zero impedance upon receipt of a control signal at said gate; and control signal furnishing means for furnishing said control signal when the amplitude of said direct current voltage exceeds a predetermined amplitude, said control signal furnishing means comprising voltage divider means having a photoresistance and having a voltage divider tap, connected from said first to said second output terminal; illuminating means connected in parallel with said voltage divider means, mounted in operative proximity to said photoresistance means, the light emitted by said illuminating means varying as a function of said direct current voltage; transistor means having an emitter-collector circuit and a base; means connecting said emitter-collector circuit from said first output terminal to said gate of said bidirectional thyristor switching means; and Zener diode means connecting said base of said transistor means to said voltage divider tap.
Claim 3
Dependent Claim
16 words
An arrangement as set forth in claim 1, wherein said illuminating means comprise an incandescent bulb.
Claim 4
Dependent Claim
21 words
A voltage regulator arrangement as set forth in claim 2, wherein said incandescent bulb is heated to a red heat only.
Claim 5
Dependent Claim
25 words
A voltage regulator arrangement as set forth in claim 3, wherein said red heat is a low red heat, barely perceptible by the human eye.
Claim 6
Dependent Claim
19 words
A voltage regulator arrangement as set forth in claim 1, wherein said bidirectional thyristor switching means comprise a triac.
Claim 7
Dependent Claim
44 words
A voltage regulator arrangement as set forth in claim 5, wherein said output winding comprises a first winding; and a second winding series connected with and magnetically coupled to said first winding; and wherein said triac is connected in parallel with said first winding.
Claim 8
Dependent Claim
18 words
A voltage regulator arrangement as set forth in claim 6, wherein said rectifier means comprise a full-wave rectifier.
Claim 9
Dependent Claim
19 words
A voltage regulator arrangement as set forth in claim 1, wherein said alternating current generator comprises a permanent magnet.
References Cited (Backward Citations)
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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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |