Protectors for electric circuits

Claim 1

A FUSIBLE RELAY THAT COMPRISES A HOUSING, AN ELECTRICALLY NON-CONDUCTING SUPPORT DISPOSED WITHIN SAID HOUSING, SAID SUPPORT HAVING AN OPENING THROUGH IT, A SUBSTANTIALLY FLAT CONDUCTIVE PLATE THAT IS FIXEDLY SECURED TO SAID SUPPORT AND HAS A PORTION THEREOF IN REGISTER WITH AND ABUTTING AND CLOSING ONE END OF SAID OPENING, A SECOND SUBSTANTIALLY FLAT CONDUCTIVE PLATE THAT IS FIXEDLY SECURED TO SAID SUPPORT AND HAS A PORTION THEREOF IN REGISTER WITH AND NORMALLY ABUTTING AND CLOSING THE OTHER END OF SAID OPENING, A THIRD SUBSTANTIALLY FLAT CONDUCTIVE PLATE THAT IS FIXEDLY SECURED TO SAID SUPPORT AND HAS A PORTION THEREOF IN REGISTER WITH BUT NORMALLY SPACED AWAY FROM SAID PORTION OF SAID SECOND SUBSTANTIALLY FLAT PLATE, SAID PORTION OF SAID SECOND SUBSTANTIALLY FLAT PLATE BEING INTERMEDIATE SAID OTHER END OF SAID OPENING AND SAID PORTION OF SAID THIRD SUBSTANTIALLY FLAT PLATE AND BEING BIASED AWAY FROM SAID OTHER END OF SAID OPENING AND TOWARD SAID PORTION OF SAID THIRD SUBSTANTIALLY FLAT PLATE, A FUSIBLE WIRE THAT IS DISPOSED WITHIN SAID OPENING AND THAT EXTENDS BETWEEN AND IS SECURED TO SAID PORTIONS OF THE FIRST SAID AND SAID SECOND SUBSTANTIALLY FLAT PLATES, SAID FUSIBLE WIRE BEING DIMENSIONED TO NORMALLY HOLD SAID PORTION OF SAID SECOND SUBSTANTIALLY FLAT PLATE IN INTIMATE ABUTTING AND CLOSING RELATION WITH SAID OTHER END OF SAID OPENING BUT RESPONDING TO THE PASSAGE OF A PREDETERMINED CURRENT THERETHROUGH TO MELT AND THEREBY FREE SAID PORTION OF SAID SECOND SUBSTANTIALLY FLAT PLATE FOR MOVEMENT AWAY FROM SAID OTHER END OF SAID OPENING AND INTO ENGAGEMENT WITH SAID PORTION OF SAID THIRD SUBSTANTIALLY FLAT PLATE, AND TERMINALS ON SAID HOUSING THAT ARE CONNECTED TO SAID THREE SUBSTANTIALLY FLAT PLATES, SAID SECOND SUBSTANTIALLY FLAT PLATE NORMALLY CONNECTING A CIRCUIT TO THE FIRST SAID SUBSTANTIALLY FLAT PLATE THROUGH THE MEDIUM OF SAID FUSIBLE WIRE BUT RESPONDING TO THE MELTING OF SAID FUSIBLE WIRE TO CAUSE THE SAID PORTION THEREOF TO ENGAGE, AND TRANSFER SAID CIRCUIT TO, SAID PORTION OF SAID THIRD SUBSTANTIALLY FLAT PLATE, THE FIRST SAID AND SAID THIRD SUBSTANTIALLY FLAT PLATE, THE FIRST SAID AND SAID THIRD SUBSTANTIALLY FLAT PLATES BEING STIFF AND RESISTANT TO BENDING, THE TERMINAL CONNECTED TO SAID SECOND SUBSTANTIALLY FLAT PLATE BEING AT ONE END OF SAID HOUSING, THE TERMINAL CONNECTED TO SAID THIRD SUBSTANTIALLY FLAT PLATE BEING AT THE OPPOSITE END OF SAID HOUSING, THE TERMINAL CONNECTED TO THE FIRST SAID SUBSTANTIALLY FLAT PLATE BEING INTERMEDIATE THE ENDS OF SAID HOUSING, SAID TERMINAL CONNECTED TO SAID THIRD SUBSTANTIALLY FLAT PLATE BEING SMALLER THAN THE TERMINALS CONNECTED TO THE FIRST SAID AND SAID SECOND SUBSTANTIALLY FLAT PLATES.