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    Event-monitoring system
    2.
    发明授权
    Event-monitoring system 失效
    事件监控系统

    公开(公告)号：US3631431A

    公开(公告)日：1971-12-28

    申请号：US3631431D

    申请日：1969-05-27

    申请人： GULTON IND INC

    发明人： COX JAY A

    IPC分类号： G08B26/00 ,  G08B25/00

    CPC分类号： G08B26/005

    摘要： An event-monitoring system including saturable core devices having respective separate saturable cores most desirably each carrying a biasing winding and a scanning winding, the biasing windings being connected in series with one another and the scanning windings being connected in series with one another. The biasing windings of the saturable core devices have different numbers of turns so an instantaneous predetermined magnitude of biasing current will saturate the cores to progressively increasing degrees. The series connected scanning windings receive a scanning current of progressively increasing value, which most advantageously have an AC component superimposed thereon, to develop an oppositely directed progressively increasing electromagnetic field sequentially to unsaturate the cores at predetermined current values normally to cause sequential electrical output signals to be generated thereby, the interval during which unsaturation occurs being a large number of cycles at the modulating frequency. Associated conditionresponsive switch means are connected to each saturable core device, such as across each scanning windings, or preferably across a separate isolation winding, so closure of the switch means will prevent the generation of said output signal.

    Power inverter oscillator circuit
    4.
    发明授权
    Power inverter oscillator circuit 失效
    电源逆变器振荡器电路

    公开(公告)号：US3691450A

    公开(公告)日：1972-09-12

    申请号：US3691450D

    申请日：1971-06-14

    申请人： GULTON IND INC

    发明人： COX JAY A

    IPC分类号： H02M7/5383 ,  H02M7/52

    CPC分类号： H02M7/53835 ,  Y10S315/07

    摘要： A power inverter oscillator circuit including an output transformer with a primary winding, the opposite end of which are connected to the load terminals of a pair of power transistors and to the center-tap of which is connected a source of D.C. voltage. The transformer is provided with a feed-back secondary winding connected to the base terminals of the transistors. The oscillator circuit is provided with output transformer saturation and current overlap prevention means operable at least under load conditions and comprising resonant circuit-forming means coupled to a secondary winding of the transformer and inductance means coupled between the bases of the transistors for producing a sinusoidal-like waveform of voltage in the transformer windings, effecting the alternate switching of said transistors into conduction without the saturation of said output transformer, and effecting the complete cessation of flow of current through one of the transistors before current begins to flow in the other switch device.