Ignition device

• US 5,433,147 A
• Filed: 03/14/1994
• Issued: 07/18/1995
• Est. Priority Date: 03/12/1993
• Status: Expired due to Term

• Current Assignee: Autoliv Development AB (Autoliv Incorporated)
• Original Assignee: Dynamit Nobel AG
• Inventors: Cornelius, Peter, Bretfeld, Anton, Brede, Uwe, Jena, Hans
• Primary Examiner(s): TUDOR, HAROLD JAY
• Application Number:
  US08/209,881
• Time in Patent Office: 491 Days
• Field of Search: 102/202.1, 102/202.2, 102/202.3, 102/202.4, 102/202.5, 102/202.7, 102/202.9, 102/202.12, 102/202.14, 102/472, 102/530, 102/531, 280/741, 422/166
• US Class Current: 102/202.2
• CPC Class Codes: F42B 3/103 Mounting initiator heads in initiators; Sealing-plugs

Abstract

An electrical ignition device (1) has a metal container (2) for a firing resistor or bridge, a first (3) and a second (4) terminal pin and at least one ignition charge (5, 6).

So that firing of the ignition charge does not occur in the event of electrical discharges between terminal pins and a housing, it is proposed that the container (2) be capable of being embedded in a plastic material by injection moulding and inserted in the housing, that a first outward extension (8) be provided on the container (2) which is electrically conductively connected to the first terminal pin (3), and that a second outward extension (9) be provided on the container (2) which can be formed so as to extend to the housing leaving a small clearance and of which an outer end is not embedded in the plastic material.

Claims

1. An electrical ignition device which comprises a metal container containing an ignition bridge in electrical contact therewith, a first terminal pin connected to the container, a second terminal pin connected to the bridge and at least one ignition charge within the container, said container being embedded in a plastic material and the plastic embedded container being positioned within a housing, a first outward extension provided on the container, said extension being electrically and conductively connected to the first terminal pin, and a second outward extension provided on the container, said second outward extension having an outer end and being arranged to extend within the plastic material positioned in said housing leaving a small clearance between the housing and the outer end, said outer end not being embedded in the plastic material.

2. An ignition device according to claim 1, wherein the first terminal pin is connected to the first outward extension by a metal connection.

3. An ignition device according to claim 1 or claim 2, wherein an ignition bridge element having the ignition bridge formed thereon is arranged in the container.

4. An ignition device according to claim 3, wherein the second terminal pin is anchored in the ignition bridge element and electrically connected to the ignition bridge.

5. An ignition device according to claim 1, wherein the first and second outward extensions are diametrically opposed relative to a longitudinal axis of the container.

6. An ignition device according to claim 1, wherein the container is made of brass.

7. An ignition device according to claim 1, wherein the container is cylindrical.

8. An ignition device according to claim 1, wherein the container is embedded in a polyamide material.

9. An ignition device according to claim 1, for use with an air bag, said housing further containing a gas-generating material which is ignitable by said ignition bridge.

10. An ignition device according to claim 1, wherein the container is embedded within a body of the plastic material and an annular recess is provided between the body of the plastic material and the container in a region of the container wherein the at least one ignition charge is located.

11. An ignition device according to claim 1, wherein the outward extensions are located at an end of the container opposite to a location of the at least one ignition charge.

12. An ignition device according to claim 1, wherein the outward extensions are tabs and extend substantially radially of the longitudinal axis of the container.