US3681654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-regulating power supply circuit for gaseous discharge lamp
Assignee: Cooper Industries LLC
•
Filing: 1971-02-18
•
Granted: 1972-08-01
•
Expires: 1991-02-18
Abstract
Abstract A power supply circuit operative to supply sinusoidal highfrequency (28 kilohertz) electrical power which meets both the starting and running requirements of a gaseous discharge lamp, and further operative to regulate the light output of the lamp, all without mechanical switching means or saturable reactors.
Inventors
- 👤 Halsey P Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:40
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/36; H05B41/38; H05B41/39; H05B41/392; H05B41/3921; H05B41/3922; Y; Y10; Y10S; Y10S315/00; Y10S315/04
Claims Analysis
Total Claims: 55
Claim 1
Independent Claim
176 words
A voltage and current regulated power supply circuit for a variable-impedance, light-generating load comprising: 1. first circuit means operative to convert alternating current power to direct current power which is applied to the remainder of said power supply circuit; 2. second circuit means operative in response to a variable bias signal to generate high-frequency pulses of variable width and substantially constant amplitude; 3. third circuit means which, when coupled to the variableimpedance load, is operative in response to the output of said second circuit means to generate high-frequency, high voltage output power when the load impedance is high, and to generate high-frequency, low voltage output power when the load impedance is low; and 4. fourth circuit means operative to compare the light output of the load with the light output of a reference source and to provide a variable bias signal to said second circuit means to vary the width of the output pulses of said second circuit means in response to variations from a predetermined Level of intensity of the light output of the load.
Claim 2
Dependent Claim
176 words
A voltage and current regulated power supply circuit for a variable-impedance, light-generating load comprising: 1. first circuit means operative to convert alternating current power to direct current power which is applied to the remainder of said power supply circuit; 2. second circuit means operative in response to a variable bias signal to generate high-frequency pulses of variable width and substantially constant amplitude; 3. third circuit means which, when coupled to the variableimpedance load, is operative in response to the output of said second circuit means to generate high-frequency, high voltage output power when the load impedance is high, and to generate high-frequency, low voltage output power when the load impedance is low; and 4. fourth circuit means operative to compare the light output of the load with the light output of a reference source and to provide a variable bias signal to said second circuit means to vary the width of the output pulses of said second circuit means in response to variations from a predetermined Level of intensity of the light output of the load.
Claim 3
Dependent Claim
22 words
second circuit means operative in response to a variable bias signal to generate high-frequency pulses of variable width and substantially constant amplitude;
Claim 4
Dependent Claim
22 words
second circuit means operative in response to a variable bias signal to generate high-frequency pulses of variable width and substantially constant amplitude;
Claim 5
Dependent Claim
14 words
The power supply circuit according to claim 1 wherein said first circuit means comprises:
Claim 6
Dependent Claim
49 words
first and second inductances each having first and second terminals, said first terminal of said first inductance being connected to said first output terminal of said bridge circuit, and said first terminal of said second inductance being connected to said second output terminal of said diode bridge circuit; and
Claim 7
Dependent Claim
49 words
first and second inductances each having first and second terminals, said first terminal of said first inductance being connected to said first output terminal of said bridge circuit, and said first terminal of said second inductance being connected to said second output terminal of said diode bridge circuit; and
Claim 8
Dependent Claim
10 words
saw-tooth pulse generating means synchronized with said high-frequency oscillator means;
Claim 9
Dependent Claim
10 words
saw-tooth pulse generating means synchronized with said high-frequency oscillator means;
Claim 10
Dependent Claim
8 words
an autotransformer having first, second and third terminals;
Claim 11
Dependent Claim
8 words
an autotransformer having first, second and third terminals;
Claim 12
Dependent Claim
28 words
a diode and a discharging resistance connected in series between the junction of said capacitance and said charging resistance and the output terminal of said high-frequency oscillator means.
Claim 13
Dependent Claim
28 words
a diode and a discharging resistance connected in series between the junction of said capacitance and said charging resistance and the output terminal of said high-frequency oscillator means.
Claim 14
Dependent Claim
20 words
feedback signal generating means including a phototransistor and operative to generate a variable component of said variable bias signal; and
Claim 15
Dependent Claim
20 words
feedback signal generating means including a phototransistor and operative to generate a variable component of said variable bias signal; and
Claim 16
Dependent Claim
21 words
a light-emitting diode energized by the output of said inverter means and operative to provide a second input to said phototransistor;
Claim 17
Dependent Claim
21 words
a light-emitting diode energized by the output of said inverter means and operative to provide a second input to said phototransistor;
Claim 18
Dependent Claim
44 words
first and second normally non-conductive transistors, said first transistor having a differentiating input circuit connected to the output of said inverter means and said second transistor having a differentiating input circuit connected to said source of pulses of constant frequency, amplitude and width; and
Claim 19
Dependent Claim
44 words
first and second normally non-conductive transistors, said first transistor having a differentiating input circuit connected to the output of said inverter means and said second transistor having a differentiating input circuit connected to said source of pulses of constant frequency, amplitude and width; and
Claim 20
Dependent Claim
22 words
a variably-conductive transistor connected into the output current paths of said normally non-conductive transistors, and controlled by the output of said phototransistor.
Claim 21
Dependent Claim
22 words
a variably-conductive transistor connected into the output current paths of said normally non-conductive transistors, and controlled by the output of said phototransistor.
Claim 22
Dependent Claim
47 words
synchronous detector means operative in response to said pulses of constant frequency, amplitude, and width, said output pulses of said inverter means, and the output of said phototransistor to generate a reference signal and a variable signal which varies directly with the light output of the load;
Claim 23
Dependent Claim
47 words
synchronous detector means operative in response to said pulses of constant frequency, amplitude, and width, said output pulses of said inverter means, and the output of said phototransistor to generate a reference signal and a variable signal which varies directly with the light output of the load;
Claim 24
Dependent Claim
23 words
bias circuit means coupled to said feedback signal generating means and operative to provide said variable bias signal to said second circuit means.
Claim 25
Dependent Claim
23 words
bias circuit means coupled to said feedback signal generating means and operative to provide said variable bias signal to said second circuit means.
Claim 26
Dependent Claim
36 words
a power transistor having its base and emitter connected across said secondary winding of said transformer, and having its collector connected through said second and first terminals of said autotransformer to said first circuit means; and
Claim 27
Dependent Claim
36 words
a power transistor having its base and emitter connected across said secondary winding of said transformer, and having its collector connected through said second and first terminals of said autotransformer to said first circuit means; and
Claim 28
Dependent Claim
28 words
first amplification circuit means connected to said saw-tooth pulse generating circuit and operative to amplify the output of said saw-tooth pulse generating means and said variable bias signal;
Claim 29
Dependent Claim
28 words
first amplification circuit means connected to said saw-tooth pulse generating circuit and operative to amplify the output of said saw-tooth pulse generating means and said variable bias signal;
Claim 30
Dependent Claim
14 words
a filtering capacitance connected between said second terminals of said first and second inductances.
Claim 31
Dependent Claim
14 words
a filtering capacitance connected between said second terminals of said first and second inductances.
Claim 32
Dependent Claim
22 words
The power supply circuit according to claim 2 wherein said first and second inductances are inductively coupled by a common magnetic core.
Claim 33
Dependent Claim
50 words
third circuit means which, when coupled to the variable-impedance load, is operative in response to the output of said second circuit means to generate high-frequency, high voltage output power when the load impedance is high, and to generate high-frequency, low voltage output power when the load impedance is low; and
Claim 34
Dependent Claim
50 words
third circuit means which, when coupled to the variable-impedance load, is operative in response to the output of said second circuit means to generate high-frequency, high voltage output power when the load impedance is high, and to generate high-frequency, low voltage output power when the load impedance is low; and
Claim 35
Dependent Claim
62 words
fourth circuit means operative to compare the light output of the load with the light output of a reference source and to provide a variable bias signal to said second circuit means to vary the width of the output pulses of said second circuit means in response to variations from a predetermined Level of intensity of the light output of the load.
Claim 36
Dependent Claim
62 words
fourth circuit means operative to compare the light output of the load with the light output of a reference source and to provide a variable bias signal to said second circuit means to vary the width of the output pulses of said second circuit means in response to variations from a predetermined Level of intensity of the light output of the load.
Claim 37
Dependent Claim
14 words
The power supply circuit according to claim 1 wherein said second circuit means comprises:
Claim 38
Dependent Claim
62 words
threshold circuit means having a first input terminal connected to the output of said first amplification circuit means and a second input terminal connected to the output of said high-frequency oscillator means, and operative to generate output pulses of constant amplitude and of variable width corresponding to the period of time during which both of said input pulses exceed its threshold; and
Claim 39
Dependent Claim
62 words
threshold circuit means having a first input terminal connected to the output of said first amplification circuit means and a second input terminal connected to the output of said high-frequency oscillator means, and operative to generate output pulses of constant amplitude and of variable width corresponding to the period of time during which both of said input pulses exceed its threshold; and
Claim 40
Dependent Claim
65 words
resonant circuit means connected between said first and third terminals of said autotransformer and operative to generate a high voltage by resonating at a first high frequency in response to input power pulses from said auto-transformer when said load impedance is high, and by resonating at a second high frequency in response to input power pulses from said autotransformer when said load impedance is low.
Claim 41
Dependent Claim
65 words
resonant circuit means connected between said first and third terminals of said autotransformer and operative to generate a high voltage by resonating at a first high frequency in response to input power pulses from said auto-transformer when said load impedance is high, and by resonating at a second high frequency in response to input power pulses from said autotransformer when said load impedance is low.
Claim 42
Dependent Claim
31 words
first and second peak-to-peak detector means including a common capacitance and operative to vary the charge on said common capacitance as said variable signal from said synchronous detector means varies; and
Claim 43
Dependent Claim
31 words
first and second peak-to-peak detector means including a common capacitance and operative to vary the charge on said common capacitance as said variable signal from said synchronous detector means varies; and
Claim 44
Dependent Claim
22 words
transistor means having its input terminals connected across said common capacitance and having its output terminal connected to said bias circuit means.
Claim 45
Dependent Claim
22 words
transistor means having its input terminals connected across said common capacitance and having its output terminal connected to said bias circuit means.
Claim 46
Dependent Claim
30 words
second amplification circuit means operative to generate output pulses of predetermined polarity, constant amplitude, and variable width corresponding to the width of the output pulses of said threshold circuit means.
Claim 47
Dependent Claim
30 words
second amplification circuit means operative to generate output pulses of predetermined polarity, constant amplitude, and variable width corresponding to the width of the output pulses of said threshold circuit means.
Claim 48
Dependent Claim
17 words
The power supply circuit according to claim 4 wherein said threshold circuit means comprises a NAND gate.
Claim 49
Dependent Claim
18 words
The power supply circuit according to claim 4 wherein said second circuit means further comprises voltage regulation means.
Claim 50
Dependent Claim
15 words
The power supply circuit according to claim 6 wherein said saw-tooth pulse generating circuit comprises:
Claim 51
Dependent Claim
40 words
The power supply circuit according to claim 7 wherein said high-frequency oscillator means is operative to close a discharge current path for said saw-tooth pulse generating means through said second transistor switch in the periods between adjacent high-frequency rectangular pulses.
Claim 52
Dependent Claim
14 words
The power supply circuit according to claim 1 wherein said third circuit means comprises:
Claim 53
Dependent Claim
14 words
The power supply circuit according to claim 1 wherein said fourth circuit meaNs comprises:
Claim 54
Dependent Claim
15 words
The power supply circuit according to claim 10 wherein said feedback signal generating means comprises:
Claim 55
Dependent Claim
14 words
The power supply circuit according to claim 11 wherein said synchronous detector means comprises:
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |