Battery condition indicator
First Claim
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1. A BATTERY CONDITION INDICATOR COMPRISING A SOURCE OF ALTERNATION VOLTAGE CONNECTED TO THE PRIMARY OF A TRANSFORMER TO EXCITE THE LATTER, A BATTERY FOR AN EMERGENCY LOAD CIRCUIT AND WHOSE CONDITION IS TO BE TESTED CONNECTED IN SERIES WITH THE SECONDARY OF SAID TRANSFORMER, MEANS TO PREVENT FLOW OF D.C. CURRENT CONNECTED IN SERIES WITH THE TRANSFORMER SECONDARY AND SAID BATTERY, AND SIGNALING MEANS IN SERIES WITH THE PRIMARY OF THE TRANSFROMER FOR INDICATING THAT THE INTERNAL RESISTANCE OF SAID BATTERY HAS RISEN BEYOND A PRESELECTED VALUE.
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1 Claim
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1. A BATTERY CONDITION INDICATOR COMPRISING A SOURCE OF ALTERNATION VOLTAGE CONNECTED TO THE PRIMARY OF A TRANSFORMER TO EXCITE THE LATTER, A BATTERY FOR AN EMERGENCY LOAD CIRCUIT AND WHOSE CONDITION IS TO BE TESTED CONNECTED IN SERIES WITH THE SECONDARY OF SAID TRANSFORMER, MEANS TO PREVENT FLOW OF D.C. CURRENT CONNECTED IN SERIES WITH THE TRANSFORMER SECONDARY AND SAID BATTERY, AND SIGNALING MEANS IN SERIES WITH THE PRIMARY OF THE TRANSFROMER FOR INDICATING THAT THE INTERNAL RESISTANCE OF SAID BATTERY HAS RISEN BEYOND A PRESELECTED VALUE.
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Current AssigneeHarry G. Parke
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Original AssigneeHarry G. Parke
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InventorsParke, Harry G.
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Application NumberUS04/155,995Time in Patent Office1,531 DaysField of SearchUS Class Current340/636.11CPC Class CodesG01R 31/389 Measuring internal impedanc...
