US 4,014,264 AGranted

Combined igniter cap

AssigneeDynamit Nobel Aktiengesellschaft

InventorsHellmut Bendler, Heinz Gawlick

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Abstract

A combined igniter cap for electrical and nonelectrical ignition having an electrically conductive housing with a pole piece arranged therein. A first primer charge is arranged on a first side of the pole piece, and the pole piece being provided with a recess and a first communicating path through the pole piece between the recess and the first primer charge. A second ignition system is arranged in the recess and is ignitable from a second side of said pole piece which is disposed oppositely to the first side. An insulating element is disposed between the first side of said pole piece and the first primer charge and is provided with first and second electrical contact members having an electrical ignition bridge and/or gap formed therebetween. The electrical ignition bridge and/or gap faces the first primer charge and the first contact member is electrically conductively connected with the pole piece while the second contact member is electrically conductively connected with the housing. The insulating element is further provided with a second communicating path providing communication between the first communicating path and the first primer charge.

Claims25

Dependent claims

A combined igniter cap comprising an electrically conductive housing having a unitary one-piece pole piece arranged therein, a first primer charge arranged on a first side of said pole piece, said pole piece being provided with a recess and means providing a first communicating path through said pole piece between said recess and said first primer charge, a second ignition system being arranged in said recess and being ignitable from a second side of said pole piece which is disposed oppositely to said first side, and insulating element means formed of an electrically nonconductive material being disposed between said first side of said pole piece and said first primer charge, said insulating element means including first and second electrical contact members and an electrical ignition means formed therebetween, said electrical ignition means being arranged immediately adjacent a surface of said nonconductive material facing said first primer charge, said first contact member being electrically conductively connected with said pole piece and said second contact member being electrically conductively connected with said housing, said insulating element means further including second communicating path means for providing a communicating path between said first communicating path means and said first primer charge.

Dependencies are inferred from the claim text.