Electric primer

Claim 1

A PRIMER COMPRISING IN COMBINATION AN ELECTRIC PRIMING ELEMENT INCLUDING A CENTER ELECTRODE, A CYLINDRICAL OUTER ELECTRODE AROUND SAID CENTER ELECTRODE, A RIM ON SAID OUTER ELECTRODE BENT TOWARDS SAID CENTER ELECTRODE AND TERMINATING IN AT LEAST ONE CONTACT POINT, AN INSULATOR LOCATED BETWEEN SAID CENTER AND OUTER ELECTRODES AND HAVING A SURFACE BETWEEN SAID ELECTRODES, A METALLIC COATING ON SAID SURFACE IN CONNECTION WITH SAID ELECTRODES, MEANS FOR HOLDING SAID PRIMER ELEMENT INCLUDING A SLEEVELIKE BODY, SAID BODY HAVING AN OPEN-ENDED AXIAL BORE THERETHROUGH AND HAVING A FIRST END DIRECTED TOWARDS A MASS TO BE PRIMED BY THE PRIMER AND A SECOND END OPPOSITE TO SAID FIRST END DIRECTED OUTWARDLY FOR ELECTRICAL CONTACTING PURPOSES, AN INTERNAL SHOULDER AT SAID SECOND END, A METALLIC RETAINING RING IN SAID BORE, SAID PRIMER ELEMENT BEING MOUNTED IN ITS ENTIRETY IN SAID RETAINING RING BY FORCING IN SAID OUTER ELECTRODE, AN ANVIL LOCATED IN SAID BORE AND RESIDING ON SAID SHOULDER, A THIN INSULATING LAYER DISPOSED BETWEEN SAID SHOULDER AND SAID ANVIL, AN INSULATING WASHER DISPOSED BETWEEN SAID METALLIC RETAINING RING AND SAID ANVIL, SAID RETAINING RING BEING PRESSED IN A DIRECTION TO SAID SECOND END AGAINST SAID SHOULDER BY MEANS OF SAID INSULATING WASHER, SAID ANVIL AND SAID THIN INSULATING LAYER, AND SAID CENTER ELECTRODE OF SAID PRIMER ELEMENT PROJECTING THROUGH SAID INSULATING WASHER AND BEING CONNECTED ELECTRICALLY WITH SAID ANVIL.