Pyrotechnic devices

Claim 2

A pyrotechnic signal device comprising a discharge tube of aluminum, one end of said discharge tube being closed and the other end being open, a mass of flash-producing composition contained in said discharge tube, a thick-walled rolled paper tube contained in said discharge tube, said paper tube extending between said flash-producing composition and the side wall of said discharge tube, a thick mill-board disc located between said flash-producing composition and said closed end of said discharge tube, rupturable closure means located between said flashproducing composition and said open end of said discharge tube to seal in said flash-producing composition, an insulating board secured to the outside of the said closed end of said discharge tube, a conductive film formed on said board on the side remote from said discharge tube, said conductive film including two portions spaced apart from each other, electrically-operated igniting means located in said flash-producing composition and having two leads extending therefrom, one of said leads being connected to one of said portions of said conductive film and the other of said leads being connected to other of said portions of said conductive film, said thick disc and said closed end of said discharge tube having apertures therein, said leads extending through said apertures, and said apertures being plugged by a resinous adhesive.

Claim 3

A pyrotechnic signal device according to claim 1, wherein said aperture in said closed end of said discharge tube is slot-like and spans said portions of said conductive film.

Claim 4

A pyrotechnic signal device according to claim 2, wherein said insulating board is secured in a recess in said closed end of said discharge tube.

Claim 5

A pyrotechnic signal device according to claim 1, wherein a rupturable closure is provided for said open end of said discharge tube, and a metal disc in electrical contact with the side wall of said discharge tube is positioned in said discharge tube between said electrically-operated igniting means and said (open end of said) rupturable closure.

Claim 6

A pyrotechnic signal device according to claim 1, wherein said closure means seals the end portion of said paper tube that is adjacent to said open end of said discharge tube, and there is provided a rupturable closure for said open end of said discharge tube.

Claim 7

A pyrotechnic signal device comprising a discharge tube, one end of said discharge tube being closed and the other end being open, a mass of flash-producing composition contained in said discharge tube, a shock-absorbing tube contained in said discharge tube, said shock-absorbing tube extending between said flash-producing composition and the side wall of said discharge tube, a layer of resinous adhesive in contact with said shock-absorbing tube and said side wall of discharge tube, a shock-absorbing disc located between said flash-producing composition and said closed end of discharge tube, a layer of resinous adhesive in contact with said shock-absorbing disc and said closed end of discharge tube, rupturable closure means located between said flash-producing composition and said open end of said discharge tube to seal in said flash-producing composition, an insulating board secured to the outside of said closed end of said discharge tube, a conductive film formed on said board on the side remote from said discharge tube, said conductive film including two portions spaced apart from each other, electrically-operated igniting means located in said flash-producing composition and having two leads extending therefrom, one of said leads being connected to one of said portions of said conductive film, and the other of said leads being connected to other of said portions of said conductive film, said shock-absorbing disc and said closed end of discharge tube having apertures therein, said leads extending through said apertures, and said apertures being plugged by a resinous adhesive.

Claim 8

A pyrotechnic signal device comprising a discharge tube, one end of said discharge tube being closed and the other end being open, a mass of flash-producing composition contained in said discharge tube, a shock-absorbing tube contained in said discharge tube, said shock-absorbing tube extending between said flash-producing composition and the side wall of said discharge tube, a layer of resinous adhesive in contact with said shock-absorbing tube and said side wall of discharge tube, a shock-absorbing disc located between said flash-producing composition and said closed end of discharge tube, a layer of resinous adhesive in contact with said shock-absorbing disc and said closed end of discharge tube, rupturable closure means located between said flash-producing composition and said open end of said discharge tube to seal in said flash-producing composition, an insulating board secured to the outside of said closed end of said discharge tube, a conductive film formed on said board on the side remote from said discharge tube, said conductive film including two portions spaced apart from each other, electrically-operated igniting means located in said flash-producing composition and having two leads extending therefrom, one of said leads being connected to one of said portions of said conductive film, and the other of said leads being connected to other of said portions of said conductive film, said shock-absorbing disc and said closed end of discharge tube having apertures therein, said leads extending through said apertures, and said apertures being plugged by a resinous adhesive.