US3715651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analog-type constant-current regulator
Assignee: Individual
•
Filing: 1971-01-04
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Granted: 1973-02-06
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Expires: 1991-01-04
Abstract
Abstract Analog-type constant-current regulator which works as an alternating-current setting controller. It operates with a phaseangle split control and a zero-voltage switch. Across a rectifier, the actual value is impressed as a current. The regulator is suitable in particular for obtaining, independently of the load, a constant, effective alternating current, as a matter of example, for heating protective housings and smalldiameter conduits in which measurements are made of liquid and gaseous substances. The main circuit of the regulator includes a series connection of the load with a transducer forming part of an actual-value rectifier circuit and a control circuit which is preferably in the form of a Triac.
Inventors
- 👤 E Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:46
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/40; G05F1/44; G05F1/45; G05F1/455; G05D; G05D23/00; G05D23/19; G05D23/1906; G05D23/20; G05D23/24
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
226 words
An analog-type constant-current regulator for obtaining a desired value of a constant, effective alternating current, independent of its load, such as for providing a source of current for maintaining a uniform temperature by electric heating, e.g. in protective housings and small-diameter conduits for the measurement of fluid parameters; the regulator comprising, in combination: an actual-value rectifier circuit upon which the actual current value is impressed; a controller circuit for adjusting the desired alternating current; a circuit for coupling said corrective value to a circuit for setting said desired value; an average-value rectifier circuit for measuring the load current; a differential amplifier circuit upon which are impressed, and wherein are compared, the output of said average-value rectifier circuit and the corrected desired value for said setting circuit; a circuit for coupling the forward flow angle of said actual current to an input circuit of said differential amplifier, as a corrective value for eliminating disturbance variables; a synchronizing circuit; an ignition pulse circuit; said differential amplifier circuit being connected, by the intermediary of said synchronizing circuit and said ignition pulse circuit, to drive a control electrode in said controller circuit; and a temperature regulator circuit, operatively connected with the housing or conduit in which said uniform temperature is to be maintained, for controlling said ignition pulse circuit, wherein said temperature regulator circuit includes two stages for incremental regulation.
Claim 2
Dependent Claim
226 words
An analog-type constant-current regulator for obtaining a desired value of a constant, effective alternating current, independent of its load, such as for providing a source of current for maintaining a uniform temperature by electric heating, e.g. in protective housings and small-diameter conduits for the measurement of fluid parameters; the regulator comprising, in combination: an actual-value rectifier circuit upon which the actual current value is impressed; a controller circuit for adjusting the desired alternating current; a circuit for coupling said corrective value to a circuit for setting said desired value; an average-value rectifier circuit for measuring the load current; a differential amplifier circuit upon which are impressed, and wherein are compared, the output of said average-value rectifier circuit and the corrected desired value for said setting circuit; a circuit for coupling the forward flow angle of said actual current to an input circuit of said differential amplifier, as a corrective value for eliminating disturbance variables; a synchronizing circuit; an ignition pulse circuit; said differential amplifier circuit being connected, by the intermediary of said synchronizing circuit and said ignition pulse circuit, to drive a control electrode in said controller circuit; and a temperature regulator circuit, operatively connected with the housing or conduit in which said uniform temperature is to be maintained, for controlling said ignition pulse circuit, wherein said temperature regulator circuit includes two stages for incremental regulation.
Claim 3
Dependent Claim
226 words
An analog-type constant-current regulator for obtaining a desired value of a constant, effective alternating current, independent of its load, such as for providing a source of current for maintaining a uniform temperature by electric heating, e.g. in protective housings and small-diameter conduits for the measurement of fluid parameters; the regulator comprising, in combination: an actual-value rectifier circuit upon which the actual current value is impressed; a controller circuit for adjusting the desired alternating current; a circuit for coupling said corrective value to a circuit for setting said desired value; an average-value rectifier circuit for measuring the load current; a differential amplifier circuit upon which are impressed, and wherein are compared, the output of said averagevalue rectifier circuit and the corrected desired value for said setting circuit; a circuit for coupling the forward flow angle of said actual current to an input circuit of said differential amplifier, as a corrective value for eliminating disturbance variables; a synchronizing circuit; an ignition pulse circuit; said differential amplifier circuit being connected, by the intermediary of said synchronizing circuit and said ignition pulse circuit, to drive a control electrode in said controller circuit; and a temperature regulator circuit, operatively connected with the housing or conduit in which said uniform temperature is to be maintained, for controlling said ignition pulse circuit, wherein said temperature regulator circuit includes two stages for incremental regulation.
Claim 4
Dependent Claim
226 words
An analog-type constant-current regulator for obtaining a desired value of a constant, effective alternating current, independent of its load, such as for providing a source of current for maintaining a uniform temperature by electric heating, e.g. in protective housings and small-diameter conduits for the measurement of fluid parameters; the regulator comprising, in combination: an actual-value rectifier circuit upon which the actual current value is impressed; a controller circuit for adjusting the desired alternating current; a circuit for coupling said corrective value to a circuit for setting said desired value; an average-value rectifier circuit for measuring the load current; a differential amplifier circuit upon which are impressed, and wherein are compared, the output of said averagevalue rectifier circuit and the corrected desired value for said setting circuit; a circuit for coupling the forward flow angle of said actual current to an input circuit of said differential amplifier, as a corrective value for eliminating disturbance variables; a synchronizing circuit; an ignition pulse circuit; said differential amplifier circuit being connected, by the intermediary of said synchronizing circuit and said ignition pulse circuit, to drive a control electrode in said controller circuit; and a temperature regulator circuit, operatively connected with the housing or conduit in which said uniform temperature is to be maintained, for controlling said ignition pulse circuit, wherein said temperature regulator circuit includes two stages for incremental regulation.
Claim 5
Dependent Claim
28 words
The regulator as defiNed in claim 2, further comprising a phase-angle split control circuit capable of correcting variations of said load at least within the ratio of 1:3.
Claim 6
Dependent Claim
30 words
The regulator as defined in claim 1, wherein said controller circuit is in the form of a Triac, said corrective value being derived from the voltage drop across said Triac.
Claim 7
Dependent Claim
32 words
The regulator as defined in claim 3, further comprising a main circuit including a series connection of said load with a transducer forming part of said actual-value rectifier circuit and said Triac.
Claim 8
Dependent Claim
33 words
The regulator as defined in claim 3, further comprising a protective circuit for said Triac, in the form of at least one RC member, to prevent excess voltage pulses from reaching said Triac.
Claim 9
Dependent Claim
36 words
The regulator as defined in claim 1, further comprising elements in said circuit for setting said desired value at least within the range of 13* to 150* of said forward flow angle of the actual current.
Claim 10
Dependent Claim
58 words
The regulator as defined in claim 1, wherein said circuit for setting the desired value is in the form of a desired-value voltage divider circuit upon which is impressed a positive voltage, corrected by a negative voltage which increases with a decreasing value of said forward flow angle of the actual current, and including a supplemental load circuit.
Claim 11
Dependent Claim
21 words
The regulator as defined in claim 7, wherein said supplemental load circuit includes a Zener diode and at least one resistor.
Claim 12
Dependent Claim
40 words
The regulator as defined in claim 8, further comprising a circuit including a Zener diode and at least one resistor for making said desired value dependent on said voltage divider circuit, and at least one capacitor for suppressing high-frequency oscillations.
Claim 13
Dependent Claim
51 words
The regulator as defined in claim 1, wherein said differential amplifier circuit includes two transistors connected to respective outputs of said actual-value rectifier circuit and said circuit for setting the desired value, said transistors forming part of a bridge circuit which is balanced in the event of equal impressed voltage values.
Claim 14
Dependent Claim
41 words
The regulator as defined in claim 1, wherein said differential amplifier circuit includes a capacitor which is charged by the output of the former and is in turn discharged through said synchronizing circuit during each zero-axis crossing of the network voltage.
Claim 15
Dependent Claim
20 words
The regulator as defined in claim 1, wherein said differential amplifier circuit includes circuit elements constituting a negative feedback circuit.
Claim 16
Dependent Claim
29 words
The regulator as defined in claim 1, further comprising an end stage associated with said differential amplifier circuit and including RC members providing an approximately proportional -integral regulating effect.
Claim 17
Dependent Claim
24 words
The regulator as defined in claim 1, wherein said synchronizing circuit is in the form of a zero-voltage switch associated with said controller circuit.
Claim 18
Dependent Claim
17 words
The regulator as defined in claim 14, wherein said zero-voltage switch includes a phase-correcting voltage divider circuit.
Claim 19
Dependent Claim
132 words
A constant-current regulator for obtaining a desired value of a constant, effective alternating current, independent of the load and the mains voltage, such as for providing a source of current for maintaining a uniform temperature by electric heating, e.g. in protective housings and small-diameter conduits for the measurement of fluid parameters; the regulator comprising, in combination, a first circuit for making the desired value dependent upon the phase angle of the current flow from the source of current, a differential amplifier circuit for comparing parameters of the load current and of a presettable corrected desired value, and a second circuit for impressing a direct voltage upon the input of said differential amplifier, wherein said direct voltage is dependent on the angle of current flow and constitutes the corrective value for disturbance variables.
Claim 20
Dependent Claim
132 words
A constant-current regulator for obtaining a desired value of a constant, effective alternating current, independent of the load and the mains voltage, such as for providing a source of current for maintaining a uniform temperature by electric heating, e.g. in protective housings and small-diameter conduits for the measurement of fluid parameters; the regulator comprising, in combination, a first circuit for making the desired value dependent upon the phase angle of the current flow from the source of current, a differential amplifier circuit for comparing parameters of the load current and of a presettable corrected desired value, and a second circuit for impressing a direct voltage upon the input of said differential amplifier, wherein said direct voltage is dependent on the angle of current flow and constitutes the corrective value for disturbance variables.
Claim 21
Dependent Claim
27 words
The regulator as defined in claim 16, further comprising a phase-angle split control circuit for correcting variations of said lOad at least within the ratio of 1:3.
Claim 22
Dependent Claim
32 words
The regulator as defined in claim 16, further comprising a controller circuit in the form of a Triac, said angle of current flow being derived from the voltage drop across said Triac.
Claim 23
Dependent Claim
40 words
The regulator as defined in claim 18, further comprising a main circuit including a series connection of said load with a transducer, forming part of an actual-value rectifier circuit upon which the actual current value is impressed, and said Triac.
Claim 24
Dependent Claim
33 words
The regulator as defined in claim 18, further comprising a protective circuit for said Triac, in the form of at least one RC member, to prevent excess voltage pulses from reaching said Triac.
Claim 25
Dependent Claim
26 words
The regulator as defined in claim 16, further comprising a third circuit for coupling said direct voltage to a fourth circuit for achieving said desired value.
Claim 26
Dependent Claim
50 words
The regulator as defined in claim 21, wherein said fourth circuit is in the form of a voltage divider circuit upon which is impressed a positive voltage, corrected by a negative voltage which increases with a decreasing value of said angle of current flow, and including a supplemental load circuit.
Claim 27
Dependent Claim
21 words
The regulator as defined in claim 22, wherein said supplemental load circuit includes a Zener diode and at least one resistor.
Claim 28
Dependent Claim
32 words
The regulator as defined in claim 23, further comprising a fifth circuit including a Zener diode and at least one resistor for making said desired value dependent on said voltage divider circuit.
Claim 29
Dependent Claim
57 words
The regulator as defined in claim 16, further comprising a rectifier circuit for measuring the load current, thus acting as an average-value rectifier, a synchronizing circuit, and an ignition pulse circuit, whereby said differential amplifier circuit is connected to a control electrode in said controller circuit by way of said synchronizing circuit and said ignition pulse circuit.
Claim 30
Dependent Claim
45 words
The regulator as defined in claim 25, further comprising a temperature regulator circuit, operatively connected with the housing or conduit in which said uniform temperature is to be maintained, for controlling said ignition pulse circuit, said temperature regulator circuit having two stages for incremental regulation.
Claim 31
Dependent Claim
33 words
The regulator as defined in claim 16, further comprising elements for setting said desired value at least within the range of 13* to 150* of the forward flow angle of the actual current.
Claim 32
Dependent Claim
67 words
The regulator as defined in claim 16, wherein said differential amplifier circuit includes two transistors forming part of a bridge circuit which is balanced in the event of equal impressed voltage values, one of said transistors being connected to the output of said second circuit while the other transistor is connected to the output of an actual-value rectifier circuit upon which the actual current value is impressed.
Claim 33
Dependent Claim
37 words
The regulator as defined in claim 16, wherein said differential amplifier circuit includes a capacitor which is charged by the output of the former and is in turn discharged during each zero-axis crossing of the mains voltage.
Claim 34
Dependent Claim
20 words
The regulator as defined in claim 16, wherein said differential amplifier circuit includes circuit elements constituting a negative feedback circuit.
Claim 35
Dependent Claim
29 words
The regulator as defined in claim 16, further comprising an end stage associated with said differential amplifier circuit and including RC members providing an approximately proportional -integral regulating effect.
Claim 36
Dependent Claim
26 words
The regulator as defined in claim 16, further comprising a synchronizing circuit in the form of a zero-voltage switch operatively associated with said differential amplifier circuit.
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |