Safety device for the fuse of a projectile

The securing device for the igniter (12) of a projectile (11), comprises an inflow (15) and temperature sensitive pre-tube securing arrangement (14) having a measuring system for the inflow sensitive cooling of a conductor, which lies in a heating current circuit that is recoverable dependent upon the response of an operation-securing unit. The conductor has two heating elements (16) subjected on the igniter coat area of the free flight-inflow. The heating elements are intended towards the inflow sequentially lying with the heating current circuit. The securing device for the igniter (12) of a projectile (11), comprises an inflow (15) and temperature sensitive pre-tube securing arrangement (14) having a measuring system for the inflow sensitive cooling of a conductor, which lies in a heating current circuit that is recoverable dependent upon the response of an operation-securing unit. The conductor has two heating elements (16) subjected on the igniter coat area of the free flight-inflow. The heating elements are intended towards the inflow sequentially lying with the heating current circuit and are arranged on an electrical heating pad with heating circuit. The measuring system has an ammeter unit lying in the heating current circuit and switching on a playback circuit for releasing the sharp switch of ignition current circuit. The playback circuit is compensation information of a temperature sensor transmitting the inflow. A comparison-heating element is intended as temperature sensor in self metrological detecting, heating current circuit. The comparison heating element is arranged within the igniter coat area. Eine Sicherungsvorrichtung mit einer anström- und temperaturabhängig wirkenden Vorrohr-Sicherungseinrichtung (14) für den gegen Umwelteinflüsse hermetisch geschlossenen Zünder (12) eines Projektiles (11) weist als Messeinrichtung für die anströmabhängige Abkühlung eines stromdurchflossenen Leiters im Heizstromkreis (18) eines nur flach auf der Zünder-Mantelfläche (17) auftragenden Widerstands-Heizelementes (16) ein einer Auswerteschaltung (22) zum Scharfschalten eines Zündstromkreises vorgeschaltetes elektronisches Strommessgerät (21) auf. Vorzugsweise sind zwei gleichgespeiste Heizelemente (16, 16") in Richtung der Anströmung (15) hintereinander, und zusätzlich als Umwelt-Temperatursensor ein Vergleichs-Heizelement (16') von der Anströmung (15) unbeeinflusst, angeordnet. Das erbringt auch bei langsamen Projektilen (11) ohne Beeinträchtigung dere