Electric igniter with conductive bodies and thin connector

Claim 2

An electric igniter comprising: a pair of electrically conductive bodies separated by an insulating body, said insulating body and conductive bodies forming a smooth common surface at one end thereof; a thin connective member electrically connecting said conductive bodies, said connective member comprising: a thin metal layer bonded on one side to said common surface, a thin layer of inert material on a remaining side of said thin metal layer; and a pyrotechnic charge in pressure contact with a free side of said thin layer of inert material whereby said charge is ignited in response to an electrical current through said connective member.

Claim 3

An electric igniter according to claim 1 in which the inert layer consists of an electrically insulating layer, SiO 2 applied directly on the upper metal layer by means of vaporization under vacuum.

Claim 4

An electric igniter according to claim 2 wherein the inert layer has a thickness of approx. 1 μm.

Claim 5

An electric igniter according to claim 3 wherein the pyrotechnic charge is pressed on to the inert layer by means of a capsule arranged to be retained when the igniter is subjected to high retardation stresses.

Claim 6

An electric igniter according to claim 4 wherein the capsule is kept in position by means of a part which is bent over a flange of the first body and pressed on to said flange by means of a mounting ring.

Claim 7

An electric igniter comprising: a fuse member of conductive material having at one end thereof a portion for connection to a source of power, a wider mid portion, and a remaining narrower end portion; an isolating sleeve adapted to support said mid portion against a shoulder in an opening of an enclosure for an artillery charge; an insulating member surrounding said narrower end portion; a second member of conductive material forming a sleeve coaxial with said insulating member and narrower end portion and forming a flange facing said wider mid portion, one end of said sleeve forming a common surface with said narrower end portion and insulating member; an isolating ring separating said wider mid portion and said flange; a connective member having an interior surface connecting said first and second members along said common surface, said connective member including first and second thin metallic layers and a thin inert material layer on an exterior surface of said connective layers; and a pyrotechnic composition, said composition held in pressure contact with said thin inert material layer by means of a capsule having first and second flanges; said thin inert material providing a slow ignition for said pyrotechnic charge decreasing the susceptibility to accidental discharge as well as protecting said thin metallic layers from damage.

Claim 8

An electric igniter comprising: a fuse member of conductive material having at one end thereof a portion for connection to a source of power, a wider mid portion, and a remaining narrower end portion; an isolating sleeve adapted to support said mid portion against a shoulder in an opening of an enclosure for an artillery charge; an insulating member surrounding said narrower end portion; a second member of conductive material forming a sleeve coaxial with said insulating member and narrower end portion and forming a flange facing said wider mid portion, one end of said sleeve forming a common surface with said narrower end portion and insulating member; an isolating ring separating said wider mid portion and said flange; a connective member having an interior surface connecting said first and second members along said common surface, said connective member including first and second thin metallic layers and a thin inert material layer on an exterior surface of said connective layers; and a pyrotechnic composition, said composition held in pressure contact with said thin inert material layer by means of a capsule having first and second flanges; said thin inert material providing a slow ignition for said pyrotechnic charge decreasing the susceptibility to accidental discharge as well as protecting said thin metallic layers from damage.