Combined igniter cap

US4014264A · kind A · utility

Assignee

• Dynamit Nobel GmbH · DE

Inventors

• Hellmut Bendler · Birkenfeld, DE
• Heinz Gawlick

Key dates

• Filing date: Aug 21, 1975
• Grant date: Mar 29, 1977
• Expiry date: Aug 21, 1995

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F42C19/12
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

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.