Pilot signal circuit
First Claim
1. A PILOT SIGNAL FOR SHOWING THE EXISTENCE OF UNBALANCED OPERATING CURRENTS THROUGH A LOAD CIRCUIT COMPRISING, A PAIR OF NORMALLY BALANCED LAMP LOAD CIRCUITS OPERATED BY A SOURCE OF DIRECT CURRENT ELECTRIC POWER, MODULATING MEANS FOR CHANGING THE CURRENT VALUES APPLIED TO THE LOADS, A FERROMAGNETIC CORE CARRYING TWO OPPOSED PRIMARY WINDINGS, EACH CONNECTED IN SERIES WITH ONE OF SAID LOAD CIRCUITS AND EACH CONNECTED TO THE SOURCE OF ELECTRIC POWER, A SECONDARY WINDING ALSO ON SAID CORE FOR PROVIDING A VOLTAGE PULSE WHENEVER THE CURRENTS THROUGH THE LOADS DIFFER BY A SUBSTANTIAL AMOUNT, AND A WARNING CIRCUIT CONNECTED TO THE SOURCE OF POWER AND INCLUDING A SIGNAL LAMP AND A CONTROLLABLE IMPEDANCE, SAID IMPEDANCE COUPLED TO THE SECONDARY WINDING AND NORMALLY NON-CONDUCTIVE BUT ADAPTED TO LIGHT THE SIGNAL LAMP WHEN ACTUATED BY A PULSE AND TO MAINTAIN THE SIGNAL LAMP LIGHTED.
2 Assignments
0 Petitions
Accused Products
6 Citations
1 Claim
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1. A PILOT SIGNAL FOR SHOWING THE EXISTENCE OF UNBALANCED OPERATING CURRENTS THROUGH A LOAD CIRCUIT COMPRISING, A PAIR OF NORMALLY BALANCED LAMP LOAD CIRCUITS OPERATED BY A SOURCE OF DIRECT CURRENT ELECTRIC POWER, MODULATING MEANS FOR CHANGING THE CURRENT VALUES APPLIED TO THE LOADS, A FERROMAGNETIC CORE CARRYING TWO OPPOSED PRIMARY WINDINGS, EACH CONNECTED IN SERIES WITH ONE OF SAID LOAD CIRCUITS AND EACH CONNECTED TO THE SOURCE OF ELECTRIC POWER, A SECONDARY WINDING ALSO ON SAID CORE FOR PROVIDING A VOLTAGE PULSE WHENEVER THE CURRENTS THROUGH THE LOADS DIFFER BY A SUBSTANTIAL AMOUNT, AND A WARNING CIRCUIT CONNECTED TO THE SOURCE OF POWER AND INCLUDING A SIGNAL LAMP AND A CONTROLLABLE IMPEDANCE, SAID IMPEDANCE COUPLED TO THE SECONDARY WINDING AND NORMALLY NON-CONDUCTIVE BUT ADAPTED TO LIGHT THE SIGNAL LAMP WHEN ACTUATED BY A PULSE AND TO MAINTAIN THE SIGNAL LAMP LIGHTED.
Specification
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- Resources
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Current AssigneeEdison International
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Original AssigneeRoy B. Power
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InventorsPower, Roy B.
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Application NumberUS04/102,774Time in Patent Office1,209 DaysField of SearchUS Class Current340/642CPC Class CodesB60Q 11/005 for lighting devices, e.g. ...
