US3847533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame ignition and supervision system
Assignee: BLOOM-1 Inc A CORP OF
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Filing: 1973-03-12
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Granted: 1974-11-12
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Expires: 1993-03-12
Abstract
Abstract Disclosed is a valve control circuit for fuel burners and the like. Energy is received by an energy storage circuit and periodically is rapidly removed therefrom and transferred to a pulse circuit. The pulse circuit, responsive only to pulses, receives the energy pulses on discharge and provides a valve activating signal in response thereto. The system is failsafe inasmuch as component failure prevents the pulses from being supplied to the pulse circuit. Furthermore, limit apparatus prevents sufficient power from being directly supplied from the power source to the valve to cause actuation. Two timers are also provided to cause system lock out in the event of failure to ignite. Either timer is sufficient by itself to cause lock out so that if one of the timers fails, lock out is still achieved.
Inventors
- 👤 W Riordan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:54
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/20; F23N5/203; F23N5/02; F23N5/12; F23N5/123; F23N2227/00; F23N2227/18; F23N2227/36; F23N2229/00; F23N2229/12; F23N2231/00; F23N2231/10; F23N2231/12
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
116 words
Circuit apparatus for controlling a fuel burner and comprising: a power source; flame responsive means for detecting flame at the burner; valve means for controlling the flow of fuel to the burner; energy storage means for receiving and storing electric energy from said power source; energy transfer means responsive to the detection of flame by said flame responsive means for transferring the energy stored in said energy storage means to said valve means for actuating said valve means to produce fuel flow to the burner; and limit means for preventing sufficient energy from flowing from said power source directly to said valve means to provide actuation thereof at any time during normal operation of said apparatus.
Claim 2
Dependent Claim
116 words
Circuit apparatus for controlling a fuel burner and comprising: a power source; flame responsive means for detecting flame at the burner; valve means for controlling the flow of fuel to the burner; energy storage means for receiving and storing electric energy from said power source; energy transfer means responsive to the detection of flame by said flame responsive means for transferring the energy stored in said energy storage means to said valve means for actuating said valve means to produce fuel flow to the burner; and limit means for preventing sufficient energy from flowing from said power source directly to said valve means to provide actuation thereof at any time during normal operation of said apparatus.
Claim 3
Dependent Claim
45 words
Apparatus according to claim 1 wherein said energy transfer means comprises discharge means for rapidly removing the energy stored in said energy storage means and wherein said valve means comprises pulse responsive means for rendering said valve means responsive only to rapid surges of energy.
Claim 4
Dependent Claim
13 words
Apparatus according to claim 2 wherein said pulse responsive means comprises a resistance.
Claim 5
Dependent Claim
13 words
Apparatus according to claim 2 wherein said energy storage means comprises an inductance.
Claim 6
Dependent Claim
16 words
Apparatus according to claim 4 wherein said inductance comprises the primary winding of a spark transformer.
Claim 7
Dependent Claim
16 words
Apparatus according to claim 4 wherein said inductance comprises a third winding of a spark transformer.
Claim 8
Dependent Claim
34 words
Apparatus according to claim 2 wherein said flame responsive means comprises periodic control means for periodically activating said discharge means so as to cause the periodic removal of energy from said energy storage means.
Claim 9
Dependent Claim
29 words
Apparatus according to claim 7 wherein said pulse responsive means comprises energy storage filter means for maintaining valve actuating signals between the receipt of pulses from said discharge means.
Claim 10
Dependent Claim
14 words
Apparatus According to claim 8 wherein said energy storage filter means comprises a capacitor.
Claim 11
Dependent Claim
30 words
Apparatus according to claim 8 wherein said energy storage filter means comprises isolation means for preventing the flow of energy from said energy storage filter means to said discharge means.
Claim 12
Dependent Claim
29 words
Apparatus according to claim 10 wherein said energy storage filter means comprises a capacitor and said isolation means comprises a diode for coupling said capacitor to said discharge means.
Claim 13
Dependent Claim
36 words
Apparatus according to claim 2 comprising an input circuit including said energy storage means and further comprising a pulse circuit coupled to said input circuit by said energy transfer means and including said pulse responsive means.
Claim 14
Dependent Claim
28 words
Apparatus according to claim 12 wherein said discharge means comprises isolation means for preventing charging energy received by said input circuit from passing directly to said pulse circuit.
Claim 15
Dependent Claim
46 words
Apparatus according to claim 2 wherein said pulse responsive means comprises an inductance for receiving pulses from said discharge means and a capacitor coupled to said inductance by a diode that conducts energy to said capacitor during the flyback in said inductance induced by the pulses.
Claim 16
Dependent Claim
42 words
Apparatus according to claim 2 wherein said pulse responsive means comprises an inductance for receiving pulses from said discharge means and a capacitor coupled to said inductance by a diode that couples the voltage peaks induced by the pulses to said capacitor.
Claim 17
Dependent Claim
41 words
Apparatus according to claim 2 wherein said pulse responsive means comprises a resistance for receiving pulses from said discharge means and a capacitor coupled to said resistance by a diode that couples voltage peaks produced by the pulses to said capacitor.
Claim 18
Dependent Claim
14 words
Apparatus according to claim 2 wherein said discharge means comprises a silicon controlled rectifier.
Claim 19
Dependent Claim
155 words
Circuit apparatus for controlling a fuel burner and comprising: flame responsive means for producing flame signals in response to detection of flame at the burner; valve means for controlling the flow of fuel to the burner; a power source; energy supply means for transferring electric energy from said source to said valve means so as to produce actuation thereof and fuel flow to the burner; control means for generating rapid surges of energy from said energy supply means in response to signals from said flame responsive means, said rapid surges of energy having a frequency substantially greater than said power source; and energy responsive means for receiving said rapid surges of energy from said energy supply means and actuating said valve means in response thereto, and wherein said energy responsive means comprises limit means for rendering said valve means actuatable only by rapid surges of energy having a frequency substantially greater than said power source.
Claim 20
Dependent Claim
155 words
Circuit apparatus for controlling a fuel burner and comprising: flame responsive means for producing flame signals in response to detection of flame at the burner; valve means for controlling the flow of fuel to the burner; a power source; energy supply means for transferring electric energy from said source to said valve means so as to produce actuation thereof and fuel flow to the burner; control means for generating rapid surges of energy from said energy supply means in response to signals from said flame responsive means, said rapid surges of energy having a frequency substantially greater than said power source; and energy responsive means for receiving said rapid surges of energy from said energy supply means and actuating said valve means in response thereto, and wherein said energy responsive means comprises limit means for rendering said valve means actuatable only by rapid surges of energy having a frequency substantially greater than said power source.
Claim 21
Dependent Claim
13 words
Apparatus according to claim 18 wherein said source comprises an A.C. power supply.
Claim 22
Dependent Claim
12 words
Apparatus according to claim 18 wherein said limit means comprises an inductance.
Claim 23
Dependent Claim
15 words
Apparatus according to claim 20 wherein said inductance comprises a winding of a spark transformer.
Claim 24
Dependent Claim
20 words
Apparatus according to claim 21 wherein said valve means comprises an electromagnetic valve control means coupled to said spark transformer.
Claim 25
Dependent Claim
132 words
Circuit apparatus for controlling a fuel burner and comprising: valve means for controlling the flow of fuel to the burner; ignition means for igniting fuel emanating from the burner; ignition timer means for timing operation of said ignition means; lock out means responsive to said ignition timer means for locking out said apparatus to prevent fuel flow to the burner after operation of said ignition means for a predetermined period of time; auxiliary timer means for timing operation of said ignition means, said auxiliary timer means being coupled to said lock out means for causing lock out of said apparatus after operation of said ignition means for a second predetermined period of timE; and flame responsive means for preventing the operation of said ignition means when flame is established at the burner.
Claim 26
Dependent Claim
132 words
Circuit apparatus for controlling a fuel burner and comprising: valve means for controlling the flow of fuel to the burner; ignition means for igniting fuel emanating from the burner; ignition timer means for timing operation of said ignition means; lock out means responsive to said ignition timer means for locking out said apparatus to prevent fuel flow to the burner after operation of said ignition means for a predetermined period of time; auxiliary timer means for timing operation of said ignition means, said auxiliary timer means being coupled to said lock out means for causing lock out of said apparatus after operation of said ignition means for a second predetermined period of timE; and flame responsive means for preventing the operation of said ignition means when flame is established at the burner.
Claim 27
Dependent Claim
54 words
Apparatus according to claim 23 wherein said ignition timer means receives energy at a preselected rate during normal operation of said ignition means and comprises energy accumulation means for accumulating the energy received and threshold means for activating said lock out means for causing lock out when a predetermined amount of energy is accumulated.
Claim 28
Dependent Claim
35 words
Apparatus according to claim 24 wherein said ignition timer means further comprises leakage means for dissipating the energy accumulated and rendering said lock out means responsive to only substantially continuous operation of said ignition means.
Claim 29
Dependent Claim
15 words
Apparatus according to claim 25 wherein said lock out means comprises a thermal circuit breaker.
Claim 30
Dependent Claim
53 words
Apparatus according to claim 24 wherein said auxiliary timer means comprises shut down energy accumulation means for receiving and storing energy at a second preselected rate during normal operation of said ignition means and further comprises shut down threshold means for causing lock out after accumulation of a second predetermined amount of energy.
Claim 31
Dependent Claim
24 words
Apparatus according to claim 27 wherein said auxiliary timer means is an electronic timer and said shut down energy accumulation means comprises a capacitor.
Claim 32
Dependent Claim
33 words
Apparatus according to claim 27 comprising electronic switch means for controlling said ignition means and for supplying energy to said energy accumulation means at the preselected rate during operation of said ignition means.
Claim 33
Dependent Claim
82 words
Apparatus according to claim 29 wherein said auxiliary timer means comprises shut down means responsive to said shut down threshold means for causing said electronic switch to operate in a shut down mode after the accumulation of the second predetermined amount of energy and wherein said electronic switch means supplies energy to said energy accumulation means at a shut down rate during operation in the shut down mode and wherein the shut down rate is a higher rate than the preselected rate.
Claim 34
Dependent Claim
15 words
Apparatus according to claim 30 wherein said lock out means comprises a thermal circuit breaker.
Claim 35
Dependent Claim
15 words
Apparatus according to claim 31 wherein said electronic switch means comprises a silicon controlled rectifier.
Claim 36
Dependent Claim
21 words
Apparatus according to claim 18 wherein said rapid surges of energy have a frequency substantially greater than 60 cycles per second.
Claim 37
Dependent Claim
35 words
Apparatus according to claim 22 wherein said valve means further comprises a capacitor connected in parallel with said electromagnetic valve control means and diode means coupling said electromagnetic valve control means to said spark transformer.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |