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公开(公告)号：GB2049960A
公开(公告)日：1980-12-31
申请号：GB8014433
申请日：1980-05-01
Applicant: ELECTRONICS CORP AMERICA
Abstract: An interface circuit for indicating the state of a set of switch contacts having high noise immunity and high reliability. The switch contacts to be monitored are connected in series with the primary winding of a transformer having a magnetic core with a highly rectangular hysteresis loop. A voltage is periodically applied through the switch to the transformer primary. A test pulse of current is then passed through a secondary winding on the transformer. The signal across the secondary winding produced in response to the test pulse current indicates the closed or opened condition of the contacts.
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公开(公告)号：NL8003205A
公开(公告)日：1980-12-30
申请号：NL8003205
申请日：1980-06-02
Applicant: ELECTRONICS CORP AMERICA
Abstract: Method and apparatus for evaluating the quality of a flame in response to outputs from a flame sensor. The present invention includes a method and apparatus in which output pulses from a flame sensor are continuously counted.The number of pulses is accumulated over a time interval of a predetermined length and compared with a threshold value. The accumulated total is continuously updated to reflect the pulses received over the previous time interval to effectively provide a moving time-window of a fixed length over which pulses from the flame sensor are accumulated. Other additional checks may be made to ascertain that a flame is present, including the time over which no pulses are detected and a long-term average of the number of pulses. A preferred embodiment disclosed in which numerous self-checking features are incorporated, and which includes a novel bar-graph type of display for displaying flame quality and diagnostic information.
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公开(公告)号：BE884914A
公开(公告)日：1980-12-16
申请号：BE201857
申请日：1980-08-25
Applicant: ELECTRONICS CORP AMERICA
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公开(公告)号：NL7712151A
公开(公告)日：1978-05-08
申请号：NL7712151
申请日：1977-11-03
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：BE860507A
公开(公告)日：1978-05-05
申请号：BE182367
申请日：1977-11-04
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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Patent Agency Ranking
公开(公告)号：FR2257865B1
公开(公告)日：1977-11-18
申请号：FR7500231
申请日：1975-01-06
Applicant: ELECTRONICS CORP AMERICA
Abstract: 1459055 Burner control ELECTRONICS CORP OF AMERICA 23 Dec 1974 [11 Jan 1974] 55483/74 Heading F4T A burner control apparatus comprises a flame sensor 66 to produce a signal when a flame is present, lockout apparatus 42, 42-1, 42-2, for de-energizing the apparatus, a device 108, 108-1 for actuating fuel control means, a preignition timing interval circuit 144 and an ignition timing interval circuit 160 having a common capacitor 146 one of the timing intervals being a function of the charging of the capacitor and the other being a function of the discharging of the capacitor means 24 responsive to a request for burner operation to initiate an ignition sequence by actuating the timing circuit circuitry responsive to the actuated timing- circuit for energizing the control device at the end of the first timing interval, flame signal responsive circuitry 22 responsive to a signal from the flame sensor 66 to maintain the control device energized and means responsive to the end of the ignition timing interval to deenergize the control device and cause lockout apparatus 42, 42-1, 42-2, to lockout the burner control apparatus in the absence of the signal from the flame sensor. In operation, power is supplied through terminals 10, 12 to transformer 16 and thence to flame sensor 66. Call for burner switch 24 closes and the air flow from blower motor 28 is sensed to thus energize transformer 40 and a D.C. voltage appears at terminal 52 of full-wave rectifier 46. Capacitor 146 is uncharged and in the absence of a signal from circuit 22 transistors 98, 112 and 120 are non-conducting. Lockout switch actuator 42 is heated, pre-ignition delay capacitor 146 is charged to thus initiate charging of trial-forignition capacitor 162, and after a delay due to timing network 144, the ignition and pilot fuel are turned on 30, 32. A flame signal from circuitry 22 causes the ignition 32 to be turned-off and initiates main-fuel flow 34. If the flame signal is lost, contacts 110-2 are opened and the fuel supply is turned-off and contacts 108-1 are opened to prevent ignition or pilot-fuel flow. In a modification, the control circuitry between terminals 52, 54, Fig. 2 (not shown), is altered. In a further modification, terminals 300-, 302 are connected to a D.C. supply, which is energized in response to a call for burner, the onset of the ignition sequence being delayed by a switch 304.
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公开(公告)号：GB1428263A
公开(公告)日：1976-03-17
申请号：GB1522273
申请日：1973-03-29
Applicant: ELECTRONICS CORP AMERICA
Abstract: 1428263 Optical scanner ELECTRONICS CORP OF AMERICA 29 March 1973 [31 March 1972] 15222/73 Heading G4M Bar coded data 20, e.g. on a label on a container carried by a conveyer belt, is read by a row 30 of photosensors 32, e.g. photodiodes. Binary 0 or 1 is represented in a digit space 24 depending on whether the bar is in the left or right hand side of the space. The sensors are masked to produce a narrow slit (Fig. 4, not shown), a bar being read by at least two sensors. Circuitry (Fig. 5, not shown) actuates primary channels corresponding to these two sensors and also adjacent secondary channels, the other channels being deactivated. If the label is skewed so that the bars come under different sensors, fresh primary and secondary channels are activated and the others deactivated. Two, preferably well separated, rows of data can be read simultaneously and a clock track can be provided for synchronization. Analogue signals can also be handled.
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公开(公告)号：FR2247771A1
公开(公告)日：1975-05-09
申请号：FR7434299
申请日：1974-10-11
Applicant: ELECTRONICS CORP AMERICA
Abstract: The electronic cct. test equipment is for controlling combustion processes in a large industrial plant network such as a power station or chemical treatment plant. The control cct. includes a number of unipole disconnectors. Each loop incorporates a second re-entry point for the signals which differ from the original point of origin of the signal. Cyclic rotation and of test signals is maintained. Radiation detectors using optical detection methods may be used. Circuit interrupters are solid state elements. Only a low voltage supply, typically 12V, is required.
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公开(公告)号：GB1388057A
公开(公告)日：1975-03-19
申请号：GB2888472
申请日：1972-06-20
Applicant: ELECTRONICS CORP AMERICA
Abstract: 1388057 Burner controllers ELECTRONICS CORP OF AMERICA 20 June 1972 [21 June 1971] 28884/72 Heading F4T [Also in Divisions G1 and H3] Combustion control apparatus has a photoconductive flame sensor 65 connected in shunt with a regulated voltage source 10, a flame relay 94 and fail-safe circuitry responsive to sensor 65 for operating relay 94; the fail-safe circuitry comprising an amplifier 66, 54, 74, a fail-safe means for monitoring the regulated voltage source and having a source of standard voltage 58, an alternating voltage source applied as an additive component to the standard voltage applied to a base electrode of solid state device 16, the regulated voltage being applied to the emitter of device 16, whereby device 16 alternately conductor and is cut-off in operative mode and assumes a single state in inoperative mode, a fail sage capacitor-diode rectifier circuit 28 responsive to an output signal at the collector of device 16 so that circuit 28 produces a voltage signal level that is substantial in said operative mode and negligible in the inoperative mode, and means for applying said voltage signal level so that the amplifier is enabled and disabled in response to the substantial and negligible values respectively, the monitoring means assuming the inoperative mode upon failure of any non-resistive component thereof. The A.C voltage to the base of transistor is derived from transformer 61 via resistor 62, or by means of a secondary winding of a further transformer connected between resistor 20 and bus 38, Figs. 1, 2 (not shown). The signal at transistor 16 collector passes directly, or via a second transistor 50, to a D.C. blocking capacitor 30 in circuit 29. Photo-cell 65 is responsive to infra-red and gives a signal fluctuating with the flame predominantly at about 10 Hz, this signal being amplified by band-pass amplifier comprising transistor 66, 54 and passed via Darlington pair 75, 76 to an output transistor 74 which is arranged to conduct when transistor 82, in a boot-strap circuit, is non-conducting and vice versa, a capacitor 84 discharging through transistor 74 and charging through transistor 82 and inductor 91, which blocks signals substantially higher than 10 Hz. The varying voltage on capacitor 84 is rectified by diodes 89, 90 to charge capacitor 90 and thereby energize flame relay 94. It is stated that, except for short circuits in the resistors and inductor, all failures of components of the circuit of Fig. 3, result in de-energization of relay 94, even when the supply line voltage fluctuator at the predominant 10 Hz flame fluctuation frequency.
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