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    SELF-CHECKING FAILURE CONTROLS
    1.
    发明专利
    SELF-CHECKING FAILURE CONTROLS 未知

    公开(公告)号：DE3277702D1

    公开(公告)日：1987-12-23

    申请号：DE3277702

    申请日：1982-08-04

    Applicant: ELECTRONICS CORP AMERICA

    Inventor： CADE PHILLIP JOSEPH

    IPC: F23N5/08 ,  G08B21/00

    Abstract: A control circuit system of the type which continuously monitors its own performance so as to be self-checking, i.e., to produce a response whenever a system shows an absence of a condition being monitored or a change therein and also produces a response if the control system itself should become inoperative or otherwise malfunction, comprises: first and second sensor means (13, 14) for sensing the same event and generating signals which are comparable upon sensing the same event; signal comparing means (23) responsive to said signals from said first and second sensor means for generating a negation response in the absence of comparable signals and responsive to the presence of said comparable signals for generation comparison response; switching means (27) coupled to the output of said signal comparing means for alternately interrupting comparison of said signals in said comparison means in response to said comparison response and restoring comparison in response to said negation response; and utilization means (37) operable in response to the alternating operating of said switching means.

    2.
    发明专利
    未知

    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

    IPC: F23N5/08 ,  F23N5/18 ,  F23N5/20 ,  F23N5/12

    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.

    6.
    发明专利
    未知

    公开(公告)号：DE2500803A1

    公开(公告)日：1975-07-24

    申请号：DE2500803

    申请日：1975-01-10

    Applicant: ELECTRONICS CORP AMERICA

    Inventor： CADE PHILLIP JOSEPH

    IPC: F23N5/08 ,  F23N5/20 ,  F23N5/02

    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.

    7.
    发明专利
    未知

    公开(公告)号：DE2409939A1

    公开(公告)日：1974-09-19

    申请号：DE2409939

    申请日：1974-03-01

    Applicant: ELECTRONICS CORP AMERICA

    Inventor： CADE PHILLIP JOSEPH

    IPC: F23N5/08 ,  F23N5/24 ,  G01D1/00 ,  F23N5/02

    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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