专利名称：Oscillatory circuit utilizing PTC resistor发明人：Charles R. Griffiths,William G. Ferguson申请号：US06/108616申请日：19791231公开号：US04320309A公开日：19820316
摘要：A control circuit for producing a repetitive closed-circuit, open- circuit conditionbetween an electrical power source, such as a battery, and an electrical load comprises apositive temperature coefficient resistor in series with a relay coil. The PTC resistor iscaused to alternate between a low resistance state and a high resistance state whichpermits energization and de-energization of the relay coil.
申请人：GTE PRODUCTS CORPORATION
代理人：James Theodosopoulos
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