# US 5,345,872 A · Igniter

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- Number: US 5,345,872 A
- Document ID: US5345872A
- Status: Granted
- Kind: A
- Application number: 08/121,315
- Filed: 1993-09-15
- Granted: 1994-09-13
- Earliest claimed: 1993-05-28
- Assignees: Nippon Koki Co., Ltd.
- Inventors: Sakae Takahashi; Hitoshi Miyazaki; Hitoshi Kunii
- Web page: https://patentgrep.com/patent/US5345872A

## CPC

- F42B 3/103: Mounting initiator heads in initiators; Sealing-plugs
- F42B 3/18: Safety initiators resistant to premature firing by static electricity or stray currents
- F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D)

## Abstract

In an igniter of this invention, an insulated cup and a harness supporter for forming an igniter body are made of an insulating member and a lead electrode which is connected to the ground is electrically conducted to a header case, so that ignition of an igniting agent due to discharge of static electricity can be surely prevented.

## Claims

### Claim 1

An igniter comprising:
an insulated cup made of an insulating member, the insulated cup for accommodating an igniting agent and a header, the insulated cup having a rear end, the rear end of the insulated cup adapted for engaging a harness supporter;
an igniting agent in said insulated cup;
a header for igniting the igniting agent, the header having a header case made of conductive metal, a glass sintered member charged into the header, a pair of lead electrodes inserted into the header at a certain interval therebetween, wherein each of the lead electrodes includes a leading end and a rear end, the rear end of each of the lead electrodes having a harness connected thereto, a heater member for heating the igniting agent, the heater member being bridged between the leading ends of the lead electrodes; and
a harness supporter made of an insulating member, the harness supporter including a preformed mating section at a leading end of the harness supporter engaging the rear end of the insulated cup, the harness supporter having a pair of harnesses inserted into the harness supporter at a certain interval therebetween;
whereby the insulated cup is joined to the harness supporter forming an igniter body; and one of the lead electrodes is electrically conducted to the header case grounding static electricity.

### Claim 2 (depends on 1)

An igniter according to claim 1, wherein said insulated cup and said harness supporter are made of resin.

### Claim 3 (depends on 1)

An igniter according to claim 1, wherein said insulated cup and said harness supporter are made of ceramics.

### Claim 4 (depends on 1)

An igniter according to claim 1, wherein the header case is bottom-closed and cylindrical.

### Claim 5 (depends on 1)

An igniter according to claim 1, wherein the preformed mating section includes a surface for receiving the insulated cup, and the insulated cup has a corresponding mating section at its rear end for being fitted over the recessed mating surface of the harness supporter.