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公开(公告)号：GB1427635A
公开(公告)日：1976-03-10
申请号：GB4742574
申请日：1974-11-01
Applicant: ELECTRONICS CORP AMERICA
Abstract: 1427635 Combustion control apparatus ELECTRONICS CORP OF AMERICA 1 Nov 1974 [9 Nov 1973] 47425/74 Heading F4T Control apparatus for a burner having flame sensing means, such as a U.V. detector, 68 and means, such as a thermostat, 24 to apply a request signal for burner operation to the control apparatus, comprises a manually resettable burner lock-out switch 108-1 which is normally closed and an actuator 108 therefor, a flame indication circuit 100, responsive to the detector 68 or produce a signal indicative of the flame condition in the combustion chamber and two circuits in parallel for controlling the actuator 108, the first circuit comprising a latchable switch constituted by a SCR 114 with a transistor switch 116 in series and the second circuit comprising two transistor switches 118, 120 in series. The two circuits are coupled by a trigger circuit constituted by a resistor 126 and a feedback circuit consisted by a resistor 122 such that when the switch 118 closes the switch 114 is triggered closed and when said switch 114 closes said switch 118 is triggered to revert back to its normally open state. A control actuator 110 for the contacts 110-1 and a flame-sensing actuator 112 for the contacts 112-1 and 112-2 and controlled by the circuit 100 are also included in the two circuits. Contacts 108-2, 110-1 and 112-1 are normally open and contacts 108-1 and 112-2 are normally closed. A request for operation is signalled by the thermostat 24 and a blower 28 is operated and a switch 36, responsive to air flow, closes. After a delay switch 106 has closed, the actuator 110 closes switch 110-1 to initiate ignition of the pilot fuel. Also the switch 118 is closed and consequentally as explained above, switch 114 is triggered on and latches on, and switch 118 reverts back to its previous state. If a flame is established before the actuator 108 operates switch 108-1 (the delay is caused by a heating circuit which takes 5-30 seconds before reaching a desired operating temperature) actuator 112 switches over contacts 112-1 and 112-2 to ignite the main fuel. At the same time a signal is applied to switch 116 to break the circuit to the actuator 108. Should the fuel fail to ignite, or subsequently goes out, the actuator 108 operates to lock-out the burner control devices and energize an alarm 26. If a flame is present initially switch 120 will be on. This will prevent switch 114 from being switched on and will enable actuator 108 to be energized through switch 118, to operate the lock-out arrangements.
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公开(公告)号：CH564169A5
公开(公告)日：1975-07-15
申请号：CH412073
申请日：1973-03-21
Applicant: ELECTRONICS CORP AMERICA
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公开(公告)号：GB1399056A
公开(公告)日：1975-06-25
申请号：GB1514973
申请日：1973-03-29
Applicant: ELECTRONICS CORP AMERICA
Abstract: 1399056 Electric selective signalling; label reading system ELECTRONICS CORP OF AMERICA 29 March 1973 [31 March 1972] 15149/73 Headings G4H and G4M A machine-readable coded label (e.g. for identifying articles in an automatic sorting system comprises code marks 20 each disposed in the left or right half of a digit space 22 to represent binary 1 or 0 respectively. The code marks are sensed as the label moves past a scanner which outputs a pulse train 32, Fig. 4 (11011101) which can be applied to a logic circuit such as that of Fig. 3. Pulse 32-1 causes a timer 50 to produce an output 54-1 after time T 2 : since pulse 32-2 is a 1 gate 60 is enabled and a ONE signal 74-1 is output. At the same time, a flip-flop 70 is set: its output 76 causes timer 50 to produce its next output 54-2 after time T 1 . Pulse 32-3 is a 0, so 54-2 and the output from an inverter 64 enable a gate 66 to set a flip-flop 68: when 32-3 arrives it enables a gate 62 and a ZERO signal is output. Flip-flops 72, 70 are set, reset respectively, and timer 50 is caused to produce its next output after time T 0 . This procedure is then repeated for pulses 32-4 ... 32-8. In the logic circuit of Fig. 5 (not shown), a ramp generator (100) establishes the width of a digit space 22 so as to allow for the relative speed of the label and the scanner. A voltage divider (120-124) establishes the “- and ¥-diigt space points, and a generator (102) produces a sawtooth waveform which is compared with the voltage levels set by (100), (120-124) to generate data sampling pulses: a 1 or 0 is shifted into a register (156) according to the sampling result.
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公开(公告)号：CH557505A
公开(公告)日：1974-12-31
申请号：CH1129071
申请日：1971-07-30
Applicant: ELECTRONICS CORP AMERICA
Abstract: 1355376 Time delay switching circuits ELECTRONICS CORP OF AMERICA 20 July 1971 [3 Aug 1970] 34021/71 Heading H3T [Also in Division F4] Combustion of a burner is initiated by closing contacts 60-2 of a switch 60 to connect a capacitor 62, previously charged through contacts 60-1, to the base of a transistor 72 which actuates a transistor 46 to open a fuel valve 50, thus allowing an ignition attempt. The period allowed for ignition is determined by the discharging of capacitor 62 which switches off transistor 72 to close valve 50 unless successful ignition holds the valve open by means of an ultra violet sensor 20 which switches on a transistor 36 through a transformer 26 when a flame is present, and thus keeps transistor 46 in its conducting state.
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公开(公告)号：DE2424695A1
公开(公告)日：1974-12-05
申请号：DE2424695
申请日：1974-05-21
Applicant: ELECTRONICS CORP AMERICA
Inventor： THOMSON ELIHU CRAIG
IPC: G08B13/183 , G01D21/00 , F16P3/14
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Patent Agency Ranking
公开(公告)号：CA945654A
公开(公告)日：1974-04-16
申请号：CA119690
申请日：1971-08-03
Applicant: ELECTRONICS CORP AMERICA
Inventor： LORD PHILIP E
IPC: F23N5/22
Abstract: 1354319 Combustion control apparatus ELECTRONICS CORP OF AMERICA 20 July 1971 [3 Aug 1970] 34022/71 Heading F4T Combustion control apparatus comprises a flame sensor 32 operating a flame relay 36 with contacts 36-1 to 36-4, a control relay coil 38 with contacts 38-1 to 38-4, a lockout coil 40 with contacts 40-1 and 40-2 which locks out the system until manually reset on application of full line voltage across the coil, and a timer motor 22 operating cams and contacts 22-1 to 22-16 to produce a sequence of operations at predetermined times; continuity of the circuitry is initially tested by a first circuit 40, 36-4, 22-9, 38 and 40-1 and the coil 38 is energized to start motor 22, during an ensuing purge interval a test for false flame signals is maintained by a second circuit 40, 36-1, 22-16, 38-2 and 40-1, then a pseudo flame signal is applied by a capacitor 54 to energize relay 36 and pilot fuel supply and ignition devices 26 and 24 are subsequently energized, and on successful ignition a main fuel supply device 28 is energized while a third circuit 40, 36-4, 22-7, 38-2 and 40-1 tests for flame failure. During purge by a blower 20 a running interlock 18 maintains the control relay 38 energized. A limit control 14, an operating control 16 such as a thermostat, a low fire interlock which maintains motor 22 energized when a damper is in a low-fire position, and an alarm device 30 are also provided.
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公开(公告)号：GB1337302A
公开(公告)日：1973-11-14
申请号：GB121271
申请日：1971-01-11
Applicant: ELECTRONICS CORP AMERICA
Abstract: 1337302 Burner control apparatus ELECTRONICS CORP OF AMERICA 11 Jan 1971 [27 Feb 1970] 1212/71 Heading F4T A control apparatus for a burner comprises a condition sensor, e.g. flame rod 70, a first relay 90 which is responsive to signals from the rod and is in a first (unenergized) state and a second (energized) state in the absence and presence, respectively, of signals from the rod, a control relay 60 which is adapted to be switched between a first (unenergized) and second (energized) state, circuitry, e.g. switch 40-1, responsive to an operation request, e.g. heating of safe-start heater 40, for switching the control relay 60 from the unenergized to the energized state after a predetermined time interval, and clamping circuitry which is operative in response to the detection, due to spurious flame signals, of the first relay 90 in its energized state during the time interval to clamp the first relay 90 in its energized state and the control relay 60 in its unenergized state, overriding the influence of the flame rod 70. In normal start-up operation control 14 is closed, supplying power to an air blower 18 and transformer primary 28, resulting in current flow from secondary winding 29 to the two-stage amplifier and flame detector circuitry 72, which includes a FET 76, from winding 38 to safe-start heater 40 and from winding 36 to flame rod 70. In the absence of flame the FET 76 is in a conductive state and transistors 80, 82 are non- conducting, leaving relay coil 90 unenergized. After a short interval, e.g. a few seconds, heater 40 closes switch 40-1, thus supplying power to lockout switch heater 50 and control relay 60. Energizing relay 60 actuates switches 60-1, which locks relay 60 in the on position; 60-2, which opens a checkout circuit; and 60-3, which supplies power to ignitor 20 and opens pilot fuel valve 22. When the pilot is ignited the flame is sensed by rod 70, which places FET 76 in a non-conducting state resulting in transistors 80, 82 being switched on and relay coil 90 being energized. Energizing coil 90 actuates switches 90-2, which terminates the flow of current through lockout switch heater 50, 90-3, which terminates operation of the ignitor; 90-4, which actuates the main fuel valve 24 to supply fuel to the burner; and 90-1 and 90-5, which function in safety circuits. If the flame goes out during operation, relay coil 90 is de-energized and the ignition procedure re-started. If reignition is not achieved within a specified time interval, e.g. 10 seconds, lockout switch heater 50 closes switch 50-2, which actuates alarm 16, and opens switch 50-1, cutting off power from all other parts of the system. If there is a spurious flame indication in the time interval between closing control 14 and the closure of safe-start switch 40-1, relay coil 90 is energized and actuates switch 90-5, which clamps the coil 90 in its energized state, and opens switch 90-2, so that when lockout switch heater 50 is energized, relay coil 60 remains unenergized and after a specified time interval heater 50 actuates the alarm as described above.
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公开(公告)号：BE797400A
公开(公告)日：1973-07-16
申请号：BE129321
申请日：1973-03-27
Applicant: ELECTRONICS CORP AMERICA
Inventor： METCALF A G B , GUIFFRIDA P , BELLOWS A H
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公开(公告)号：BE785154A
公开(公告)日：1972-10-16
申请号：BE785154
申请日：1972-06-20
Applicant: ELECTRONICS CORP AMERICA
Inventor： THOMSON E C
Abstract: The invention describes a fail safe voltage responsive circuit for producing an output level indicative of the relationship between two voltage levels. The voltage responsive circuit includes a fail-safe comparison circuit which assumes alternative modes in response to an alternating signal introduced into the comparison circuit when the voltage levels are within a predetermined range, one relative to the other. When the voltage levels are outside the range or if a component fails, the comparison circuit ceases to alternate between modes. The voltage responsive circuit is used in a preferred application involving a fail-safe combustion control system wherein one voltage level is used to supply bias current to a photoconductive cell, the cell sensing the presence or absence of flame.
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公开(公告)号：DE1776207A1
公开(公告)日：1972-08-03
申请号：DE1776207
申请日：1967-03-30
Applicant: ELECTRONICS CORP AMERICA
Inventor： GIUFFRIDA PHILIP , J GADE PHILIP
Abstract: 1,175,980. Automatic circuit breakers; thermal switches. ELECTRONICS CORP. OF AMERICA. 29 March, 1967 [30 March, 1966], No. 14268/67. Heading H1N. [Also in Division F4] A lock-out switch in a burner control circuit has a bimetallic heater element 84 and contact elements 110, 112 mounted on spring blades 114, 114. Actuator surfaces 118, 120 are mounted on a reciprocable sleeve 128 and on a plunger 126 biased by springs 130, 132 the sleeve carrying a latch member 140 which co-operates with an adjustable latch member 142, mounted on element 84, when the plunger 126 is depressed to set the switch. Current passed through member 84 causes it to warp and release the latch and allow the contacts to be opened under the influence of the biasing springs. A thermal delay switch, Fig. 6, has a heater element 40 comprising a bimetallic element with a wide main portion 96 and a narrow strip 98 which extends downwardly to a flexible link 100 on which is mounted a contact member 102 to co-operate with a second contact (104). Current flowing through the element 40 causes the leg 98 to flex under the greater heating and close the contacts.
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