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公开(公告)号：GB1545601A
公开(公告)日：1979-05-10
申请号：GB999976
申请日：1976-03-12
Applicant: ELECTRONICS CORP AMERICA
Abstract: A flame monitoring system includes a flame sensor for producing a flame signal as a function of flame conditions in a monitored environment and flame signal enhancing circuitry coupled to the flame sensor. The flame signal enhancing circuitry has a first response as a function of a first characteristic of the flame signal and a second response different from the first response as a function of a second characteristic of the flame signal and is arranged to combine the first and second responses to provide an enhanced flame signal representative of the monitored flame.
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公开(公告)号：GB1527910A
公开(公告)日：1978-10-11
申请号：GB4654175
申请日：1975-11-11
Applicant: ELECTRONICS CORP AMERICA
IPC: F23N5/24 , H03K19/082 , H03K19/14 , F23N5/20 , H03K17/02
Abstract: 1527910 Transistor switching circuits ELECTRONICS CORP OF AMERICA 11 Nov 1975 [25 Nov 1974] 46541/75 Heading H3T [Also in Division F4] In a monitoring circuit for a burner control system (see Division F4), application of the same potential on lines 22, 26 produces a voltage across rectifier bridge 114 which energizes transistors 110, 112 and LED 106 to allow a pulse signal at input 80 to be passed to output 82.
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公开(公告)号：FR2381246A1
公开(公告)日：1978-09-15
申请号：FR7804262
申请日：1978-02-15
Applicant: ELECTRONICS CORP AMERICA
Abstract: Burner control apparatus includes control devices for actuating an ignition control means, and a timing circuit for providing an ignition timing sequence of four precise intervals. The timing circuit is actuated in response to a request for burner operation and the control devices are energized in sequence and combination in response to the actuated timing circuit. Time sequential pilot flame and main flame stabilization intervals are provided. If a signal from the flame sensor is received before the end of the overlapping flame stabilization timing intervals, the control device is energized and if flame detection signal is lost a lockout circuit is energized.
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公开(公告)号：NL7801617A
公开(公告)日：1978-08-18
申请号：NL7801617
申请日：1978-02-13
Applicant: ELECTRONICS CORP AMERICA
Abstract: Burner control apparatus includes control devices for actuating an ignition control means, and a timing circuit for providing an ignition timing sequence of four precise intervals. The timing circuit is actuated in response to a request for burner operation and the control devices are energized in sequence and combination in response to the actuated timing circuit. Time sequential pilot flame and main flame stabilization intervals are provided. If a signal from the flame sensor is received before the end of the overlapping flame stabilization timing intervals, the control device is energized and if flame detection signal is lost a lockout circuit is energized.
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公开(公告)号：CA1036245A
公开(公告)日：1978-08-08
申请号：CA194057
申请日：1974-03-05
Applicant: ELECTRONICS CORP AMERICA
Inventor： CADE PHILLIP J
Abstract: The invention has particular utility in connection with combustion control systems that employ lead sulfide (infrared sensitive) photoconductors in conjunction with band pass amplifiers. Flame relays in such systems would occasionally hold in after flame failure due to continued generation by the photoconductor of fluctuating signals. A flame failure transition responsive circuit is connected in series between the photoconductor and the flame relay and responds to an abrupt decrease in the flame signal to insure dropout of the flame relay.
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Patent Agency Ranking
公开(公告)号：FR2370268A1
公开(公告)日：1978-06-02
申请号：FR7732914
申请日：1977-11-02
Applicant: ELECTRONICS CORP AMERICA
Abstract: A two-terminal photodetector comprising a photodiode and a plurality of active and passive components connected so that when connected to a source of current the voltage across the terminals is proportional to the illumination and is proportional by an amplification factor to rapidly changing illumination levels.
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公开(公告)号：DE2715802A1
公开(公告)日：1977-10-27
申请号：DE2715802
申请日：1977-04-07
Applicant: ELECTRONICS CORP AMERICA
Inventor： CADE PHILLIP JOSEPH
Abstract: A burner control apparatus includes a timing circuit for providing two successive timing intervals of precise duration, one being a preignition timing interval and the other being an ignition timing interval. The timing circuit includes a capacitor the charging rate of which determines one of the timing intervals and the discharge rate of which determines the other timing interval. In response to a call for burner operation a blower is energized to purge the burner of potentially explosive gases during the pre-ignition timing interval. When the pre-ignition interval comes to an end relays are energized to energize a pilot fuel control and an ignition control. If a flame is sensed during the ignition interval a further relay is energized closing the ignition control and switching over from pilot to main fuel control. If no flame is sensed during this interval a lockout actuator shuts down the entire burner and energizes an alarm. If after establishment of normal burner operation the flame goes out,the cycle of two successive timing intervals is repeated.
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公开(公告)号：NL7703978A
公开(公告)日：1977-10-14
申请号：NL7703978
申请日：1977-04-12
Applicant: ELECTRONICS CORP AMERICA
Abstract: A burner control apparatus includes a timing circuit for providing two successive timing intervals of precise duration, one being a preignition timing interval and the other being an ignition timing interval. The timing circuit includes a capacitor the charging rate of which determines one of the timing intervals and the discharge rate of which determines the other timing interval. In response to a call for burner operation a blower is energized to purge the burner of potentially explosive gases during the pre-ignition timing interval. When the pre-ignition interval comes to an end relays are energized to energize a pilot fuel control and an ignition control. If a flame is sensed during the ignition interval a further relay is energized closing the ignition control and switching over from pilot to main fuel control. If no flame is sensed during this interval a lockout actuator shuts down the entire burner and energizes an alarm. If after establishment of normal burner operation the flame goes out,the cycle of two successive timing intervals is repeated.
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公开(公告)号：CA1013451A
公开(公告)日：1977-07-05
申请号：CA209244
申请日：1974-09-16
Applicant: ELECTRONICS CORP AMERICA
Inventor： BRYANT JACK A
Abstract: A burner control system in which signals indicating the condition at various locations within the system are applied to a control circuit in the form of pulse trains, causing a continuous alternation of state of solid state switching elements therein. The system actuates a switch to open a fuel valve only when the level of the control circuit output signal is alternating, indicating that the said switching elements are operative. A comparison circuit compares the control circuit output signal with a signal denoting the condition of the fuel valve, to ensure proper operation of the fuel valve switch.
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公开(公告)号：GB1456466A
公开(公告)日：1976-11-24
申请号：GB3964174
申请日：1974-09-11
Applicant: ELECTRONICS CORP AMERICA
Abstract: 1456466 Burner control ELECTRONICS CORP OF AMERICA 11 Sept 1974 [17 Sept 1973] 39641/74 Heading F4T [Also in Division G3] A control circuit for a burner system has a sensor 10, Fig. 1 which can sense the state of a fuel valve, pilot valve, or absence of flame &c., and provide a signal to a logic control circuit 12 including a solid state switching element, the circuit being adapted to produce a pulse train output signal in response to the state signal, an actuator 30 for actuating a controllable device 2, and circuit means connected between the output from the logic control circuit and the actuator and adapted to provide an actuating signal for the controllable device in response to a pulse train signal at the logic circuit output, but not otherwise. A self-checking circuit for controlling fuel valve 2 in a burner system comprises three sub-circuits Fig. 1, a control circuit 4, a fuel valve-actuating circuit 6, which operates in response to the output from circuit 4, and a comparison circuit 8 to supervise circuit 6. In operation, sensors 10 sense the state of fuel valves, medium to be heated, flame in the combustion chamber, &c., and transmit signals to a burner logic circuit 12 which produces a control signal at its output 15, for actuating fuel valve 2 in response to a call for heat. A set of normally open flame relay contacts 16 controlled by the sensors are closed when a flame is present in the combustion chamber so as to connect an A.C. power source 18 to an A.C.-D.C. converter 20 which is connected to logic circuit 12. The outputs from converter 22 and logic circuit 12 are supplied to AND gate 24. In response to a pulse train signal from AND gate 24 an energizing circuit is completed between fuel valve 2 and a power source 30 through circuit breaker contacts 46, and normally closed Burner-off Switch 32. Circuit 8 continuously monitors the fuel valve condition and compares this with the signal supplied by circuit 4 to circuit 6. If the closed state for valve 2 is indicated by one compare input signal and the other compare input signal indicates an open state, circuit breaker contacts 46 are opened. And gate 24 transmits a pulse train signal from converter 22 to open valve 2 only if a signal is present at the converter. Should the compare signal in line 43 disappear, breaker contacts 46 open, fuel valve 2 closes, and Burneroff Switch 32 de-energizes valve 2. An alternative fuel valve actuating a comparison circuit Fig. 4 (not shown) comprises an additional pulse train-to-D.C. signal converter (88). An alternative control circuitry Fig. 5 (not shown), includes sensing signal inputs (90-118) which supply pulse train signals to converters 192-194, to produce actuating signals at leads 195-197 for an ignition transformer pilot fuel valve, and main fuel valve. The circuits for converter (26), converter (22) are described in relation to Figs. 2 and 3 (not shown) respectively and an alternative comparison circuit Fig. 8 (not shown) is described.
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