Thermal protective arrangement for inductive devices

Claim 1

A THERMAL PROTECTIVE ARRANGEMENT COMPRISING IN COMBINATION: AN INDUCTIVE DEVICE INCLUDING A WINDING FOR CARRYING ELECTRIC CURRENT FORMED BY A NUMBER OF SUPERPOSED LAYERS OF WIRE, A HOLDER HAVING AT LEAST A PORTION THEREOF BURIED BETWEEN TWO ADJACENT LAYERS OF SAID WINDING, A THERMAL SENSITIVE ELECTRICAL FUSE ELEMENT OPERATIVE AT A PREDETERMINED CRITICAL TEMPERATURE LOCATED WITHIN SAID HOLDER AND HAVING ITS THERMAL SENSITIVE PORTION COMPLETELY SURROUNDED BY THE LAYERS OF SAID WINDING AND IN HEAT SENSING RELATIONSHIP THEREWITH FOR SENSING THE OPERATING TEMPERATURE OF THE WINDING, SAID HOLDER HAVING A PORTION IN DIRECT CONTACT WITH SAID WINDINGS AND LYING ADJACENT THE THERMAL SENSITIVE PORTION OF SAID FUSE ELEMENT TO CONVEY HEAT FROM SAID WINDINGS TO SAID FUSE ELEMENT TO LEAST PARTIALLY BY CONDUCTION, SAID HOLDER ALSO BEING FORMED WITH AN OPEN SECTION SUBSTANTIALLY ALONG ITS LENGTH TO PERMIT CONVECTION OF THE WINDING HEAT TO SAID FUSE ELEMENT, AND MEANS ELECTRICALLY CONNECTING SAID WINDING IN SERIES WITH SAID FUSE ELEMENT FOR MODIFYING THE WINDING WHEN THE FUSE SENSES SAID CRITICAL TEMPERATURE.