US3921059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply incorporating, in series, a stepped source and a finely regulated source of direct current
Assignee: Forbro Design Corp
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Filing: 1974-03-22
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Granted: 1975-11-18
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Expires: 1994-03-22
Abstract
Abstract A regulated power supply is operated with a precision series regulator over a predetermined range of output voltage or current. This range is added to relatively large steps of unregulated voltage to provide an overall range several times the predetermined range. Suitable overlap and time delay result in stable operation of the system. All operations are automatic and electronically controlled.
Inventors
- 👤 Paul Birman
- 👤 Sarkis Nercessian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:06
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/40; G05F1/44; G05F1/445; G05F1/14; G05F1/16; G05F1/20; G05F1/46; G05F1/56; G05F1/563
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
146 words
In a regulated power dc supply, the combination of; a first power supply including series regulating means; a second power supply; circuit means connecting said two power supplies in series aiding mode to a pair of output terminals; feedback means for controlling said series regulating means to provide a predetermined regulated voltage or current to said output terminals; means for sensing the voltage contributed by said first power supply to the total voltage across said terminals; means for incrementing said second power supply in discrete steps both to increase or to decrease the voltage contributed by it to the combined voltage across said load terminals; and means for actuating said incrementing means of said second power supply to increase its contribution when said sensed voltage is greater than a predetermined voltage and to decrease its contribution when said sensed voltage is less than a predetermined voltage.
Claim 2
Dependent Claim
146 words
In a regulated power dc supply, the combination of; a first power supply including series regulating means; a second power supply; circuit means connecting said two power supplies in series aiding mode to a pair of output terminals; feedback means for controlling said series regulating means to provide a predetermined regulated voltage or current to said output terminals; means for sensing the voltage contributed by said first power supply to the total voltage across said terminals; means for incrementing said second power supply in discrete steps both to increase or to decrease the voltage contributed by it to the combined voltage across said load terminals; and means for actuating said incrementing means of said second power supply to increase its contribution when said sensed voltage is greater than a predetermined voltage and to decrease its contribution when said sensed voltage is less than a predetermined voltage.
Claim 3
Dependent Claim
34 words
A regulated dc power supply as set forth in claim 1, and wherein; said incrementing means provides discrete steps of the order of 100 volts in the voltage contributed by said second power supply.
Claim 4
Dependent Claim
31 words
A regulated dc power supply as set forth in claim 1, and wherein; said incrementing means comprises a plurality of triacs for controlling the input voltage to said second power supply.
Claim 5
Dependent Claim
26 words
A regulated dc power supply as set forth in claim 3, and wherein; the gates of said triacs are electrically isolated by means of optical couplers.
Claim 6
Dependent Claim
48 words
A regulated dc power supply as set forth in claim 1, and including; a current sensing resistor connected in series with said series regulating means; and degenerative feedback means connected between said current sensing resistor and said regulating means for regulating The current supplied to said output terminals.
Claim 7
Dependent Claim
21 words
A regulated dc power supply as set forth in claim 1, and wherein; said incrementing means is controlled by digital circuitry.
Claim 8
Dependent Claim
42 words
A regulated dc power supply as set forth in claim 1, and wherein; said incrementing means comprises digital citcuitry including a shift register, a clock coupled to said shift register, opto-isolator drivers connected between said shift register and a plurality of triacs.
Claim 9
Dependent Claim
39 words
A regulated dc power supply as set forth in claim 1, and including; means for programming the current fed to said output terminals to zero while delaying the operation of said incrementing means for a predetermined interval of time.
Claim 10
Dependent Claim
27 words
A regulated dc power supply as set forth in claim 1, and including; means for indicating a plurality of predetermined conditions of loading across said output terminals.
Claim 11
Dependent Claim
41 words
A regulated dc power supply as set forth in claim 1, and including; a diode connected across said first power supply for protecting said series regulating means from excessive voltage in the event of a short circuit across said output terminals.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |