US3780656A - Pyrotechnic devices - Google Patents
Pyrotechnic devices Download PDFInfo
- Publication number
- US3780656A US3780656A US00043483A US3780656DA US3780656A US 3780656 A US3780656 A US 3780656A US 00043483 A US00043483 A US 00043483A US 3780656D A US3780656D A US 3780656DA US 3780656 A US3780656 A US 3780656A
- Authority
- US
- United States
- Prior art keywords
- discharge tube
- flash
- tube
- conductive film
- producing composition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B4/00—Fireworks, i.e. pyrotechnic devices for amusement, display, illumination or signal purposes
- F42B4/26—Flares; Torches
Definitions
- ABSTRACT A pyrotechnic signal device which comprises a discharge tube, a rupturable casing which is housed within the discharge tube and which contains flashproducing composition, and electrically-operated means for igniting the pyrotechnic composition that includes contacts on the outer surface of the discharge tube.
- the casing may remain in the discharge tube when the pyrotechnic composition is combusting so that the composition undergoes combustion inthe discharge tube.
- the means for igniting the pyrotechnic composition includes an electrical conductor which extends through a composition which ignites when the temperature of the wire is raised by passing a suitable current through the wire, the ends of the electrical conductor being connected to the contacts on the outer surface of the discharge tube; this arrangement is particularly reliable in operation.
- the contacts are preferably formed on the lower end of the discharge tube, that is, the end of the discharge tube remote from the end through which the casing is projected or a flash emanates.
- the contacts may be in the form of a printed circuit whose conducting parts comprise a central portion, and an annular ring surrounding, but spaced apart from, the central portion.
- the upper end of the discharge tube may be provided with closure means which are arranged to be displaced or destroyed in response to the firing of the device, preferably in response to gases of combustion generated when the device is fired.
- the discharge tube is preferably a cartridge case, for example, a standard 1% inch cartridge case.
- the discharge tube is formed of metal and a metal disc (preferably, of aluminum foil) in electrical contact with the wall of the discharge tube is positioned in the tube above the casing and extends over substantially the whole of the cross-section of the tube, the disc being arranged to be displaced or destroyed by gases of combustion generated when the device is fired.
- a metal disc preferably, of aluminum foil
- the casing When the pyrotechnic composition is arranged to undergo combustion in the discharge tube, the casing may be rupturable at its upper end in response to combustion of the pyrotechnic composition, so that when the device is fired, a flash will emanate from the upper end of the discharge tube, and the walls of the casing will tend to protect the walls of the discharge tube from the increase in pressure that occurs on combustion.
- the means for igniting the pyrotechnic composition may include an electrical conductor which is connected to the contacts on the discharge tube, which extends through the lower end of the casing, and which passes through a composition in contact with the pyrotechnic composition, the composition igniting when the temperature of the wire is raised by passing a current through the wire.
- a pyrotechnic signal device constructed in accor dance with the invention will now be described in detail, by way of example, with reference to the accompanying drawing, which shows the device in an axial section.
- the signal device comprises an aluminium discharge tube in the form of a conventional 1% inch cartridge case, whose upper end is closed by a mill-board disc 23 which is held in position by lacquer 24.
- the lacquer 24, which is colored, is used for identification purposes, as is a disc 25, which is held in position by varnish 26.
- the cartridge case 1 contains a casing which comprises a tube 27 of rolled Kraft paper closed at the upper and lower ends by end closures in the form of mill-board discs 28 and 29, which are glued in position.
- the tube 27 is secured in the cartridge case 1 by a layer of resinous adhesive (or epoxy adhesive) 31 positioned between the tube 27 and the inner wall of the cartridge case.
- the casing contains flash-producing pyrotechnic composition 11.
- the walls of the tube 27 are arranged to be thick enough to protect the wall of the cartridge case when the composition 11 undergoes combustion, and the disc 29, which is secured to the base of the cartridge case with an epoxy adhesive, such as the epoxy resin adhesive sold under the trade mark Araldite, similarly protects the printed circuit board described hereinafter.
- the pyrotechnic composition 11 consists of 42 parts of magnesium powder, 8 parts of Acaroid resin, and parts of potassium nitrate, the parts being by weight.
- the lower end of the cartridge case 1 is recessed to accommodate a printed circuit consisting of a conductive film comprising a central portion of conducting material 2 surrounded by an annular ring of conducting material 3, which are located on a board of insulating material 4.
- Wires 5 of an electrically-operated igniting mechanism, indicated generally by the reference numeral 6, pass through a slot 7 (or alternatively, they may pass through two holes) formed in the base of the cartridge case and through holes formed in the printed circuit board 4 registering with the two parts 2 and 3 of the printed circuit.
- the wires 5 are soldered to the parts 2 and 3 of the printed circuit, so that application of a voltage between the two parts of the circuit operates the igniting mechanism 6.
- the head 8 of the igniting mechanism is a conventional electric matchhead, in which a Nichrome wire is surrounded by a composition which combusts when a suitable current passes through the wire.
- the Nichrome wire is connected to the wires 5 of the mechanism.
- the wires 5 of the igniting mechanism 6 pass through a hole 30 formed in the disc 29 and the head is located in the pyrotechnic composition 11.
- the hole 30 is sealed with an epoxy adhesive; during the manufacture of the device, when the igniting mechanism 6 has been soldered to the printed circuit board, the member 27 is inserted in the case 1, epoxy adhesive is spread around the base of the igniting mechanism 6 and the slot 7 plugged with it, and the member 29 is inserted in the cartridge case 1 and pushed towards the base until the adhesive rises up through the hole 30 and seals it.
- a thin mill-board disc 32 covered on its lower surface by a layer of aluminum foil 33 is positioned in the cartridge case ll above the casing housing the composition Ill.
- the edges of the aluminum foil 33 are turned around the edges of the disc 32 and the foil makes electrical contact with the inner wall of the cartridge case 1. In this way, accidental operation of the igniting mechanism 6 due to the presence of a strong electric field is prevented.
- a suitable voltage is applied between the regions 2 and 3 of the printed circuit board, thereby operating the igniting mechanism 6 and causing the pyrotechnic composition 11 to ignite.
- the combustion of the composition 11 results in the casing containing it rupturing the discs 19, 23 and 28 being displaced, and the production of a flash and report.
- 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 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 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
- 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.
- 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.
- a pyrotechnic signal device according to claim 1,
- 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 electricallyoperated igniting means and said (open end of said) rupturable closure.
- 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.
- 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 flashproducing 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
Abstract
A pyrotechnic signal device which comprises a discharge tube, a rupturable casing which is housed within the discharge tube and which contains flash-producing composition, and electricallyoperated means for igniting the pyrotechnic composition that includes contacts on the outer surface of the discharge tube.
Description
ilnited States Patent 1191 Murray Dec. 25, 1973 1 PYROTECHNIC DEVHCES [75] Inventor: Dudley Charles Murray,
Homington, near Salisbury, England [73] Assignee: Pains-Wessex Limited, Wiltshire,
England 1221 Filed: June 4,1970
121 AppL No.: 43,483
[52] U.S. Cl l02/37.6, 102/378, 102/70.2 R [51] Int. Cl. C06d 1/04, C06d 1/10 [58] Field of Search 102/376, 37.8, 34.4,
[56] References Cited UNITED STATES PATENTS 3,298,311 1/1967 Catlin ..lO2/37.8X
2,462,135 2/1949 Skinner 102/702 A 2,977,878 4/1961 Kinkel et al. 102/702 A X 3,051,085 8/1962 Finkelstein 102/37.8
Primary ExaminerBenjamin A. Borchelt Assistant Examiner-1ames M. Hanley Att0rneyHall and Houghton [57] ABSTRACT A pyrotechnic signal device which comprises a discharge tube, a rupturable casing which is housed within the discharge tube and which contains flashproducing composition, and electrically-operated means for igniting the pyrotechnic composition that includes contacts on the outer surface of the discharge tube.
6 Claims, 1 Drawing Figure Ill] PATENTED 3,780,656
Dumsr 6. MAM/FA 1 INVENTOR ATTORNEY PYao'rEcuNic DEVICES The firing of the device results in the production of a flash and a report. Such devices can be fired very easily by remote control.
The casing may remain in the discharge tube when the pyrotechnic composition is combusting so that the composition undergoes combustion inthe discharge tube.
Advantageously, the means for igniting the pyrotechnic composition includes an electrical conductor which extends through a composition which ignites when the temperature of the wire is raised by passing a suitable current through the wire, the ends of the electrical conductor being connected to the contacts on the outer surface of the discharge tube; this arrangement is particularly reliable in operation.
The contacts are preferably formed on the lower end of the discharge tube, that is, the end of the discharge tube remote from the end through which the casing is projected or a flash emanates. The contacts may be in the form of a printed circuit whose conducting parts comprise a central portion, and an annular ring surrounding, but spaced apart from, the central portion. Such an arrangement reduces the time taken for connecting the device to a firing device (that is, to means for applying a voltage between the contacts), since it is not necessary for the discharge tube to occupy any particular angular position about the axis of the tubular member when connected to the firing device.
The upper end of the discharge tube may be provided with closure means which are arranged to be displaced or destroyed in response to the firing of the device, preferably in response to gases of combustion generated when the device is fired.
The discharge tube is preferably a cartridge case, for example, a standard 1% inch cartridge case.
Advantageously, the discharge tube is formed of metal and a metal disc (preferably, of aluminum foil) in electrical contact with the wall of the discharge tube is positioned in the tube above the casing and extends over substantially the whole of the cross-section of the tube, the disc being arranged to be displaced or destroyed by gases of combustion generated when the device is fired. This serves to prevent the electricallyoperated igniting means from being operated accidentally as is liable to happen with some igniting means in the presence of a strong electric field.
When the pyrotechnic composition is arranged to undergo combustion in the discharge tube, the casing may be rupturable at its upper end in response to combustion of the pyrotechnic composition, so that when the device is fired, a flash will emanate from the upper end of the discharge tube, and the walls of the casing will tend to protect the walls of the discharge tube from the increase in pressure that occurs on combustion. The means for igniting the pyrotechnic composition may include an electrical conductor which is connected to the contacts on the discharge tube, which extends through the lower end of the casing, and which passes through a composition in contact with the pyrotechnic composition, the composition igniting when the temperature of the wire is raised by passing a current through the wire.
A pyrotechnic signal device, constructed in accor dance with the invention will now be described in detail, by way of example, with reference to the accompanying drawing, which shows the device in an axial section.
Referring to the drawing, the signal device comprises an aluminium discharge tube in the form of a conventional 1% inch cartridge case, whose upper end is closed by a mill-board disc 23 which is held in position by lacquer 24. The lacquer 24, which is colored, is used for identification purposes, as is a disc 25, which is held in position by varnish 26.
The cartridge case 1 contains a casing which comprises a tube 27 of rolled Kraft paper closed at the upper and lower ends by end closures in the form of mill- board discs 28 and 29, which are glued in position. The tube 27 is secured in the cartridge case 1 by a layer of resinous adhesive (or epoxy adhesive) 31 positioned between the tube 27 and the inner wall of the cartridge case. The casing contains flash-producing pyrotechnic composition 11. The walls of the tube 27 are arranged to be thick enough to protect the wall of the cartridge case when the composition 11 undergoes combustion, and the disc 29, which is secured to the base of the cartridge case with an epoxy adhesive, such as the epoxy resin adhesive sold under the trade mark Araldite, similarly protects the printed circuit board described hereinafter.
The pyrotechnic composition 11 consists of 42 parts of magnesium powder, 8 parts of Acaroid resin, and parts of potassium nitrate, the parts being by weight.
The lower end of the cartridge case 1 is recessed to accommodate a printed circuit consisting of a conductive film comprising a central portion of conducting material 2 surrounded by an annular ring of conducting material 3, which are located on a board of insulating material 4. Wires 5 of an electrically-operated igniting mechanism, indicated generally by the reference numeral 6, pass through a slot 7 (or alternatively, they may pass through two holes) formed in the base of the cartridge case and through holes formed in the printed circuit board 4 registering with the two parts 2 and 3 of the printed circuit. The wires 5 are soldered to the parts 2 and 3 of the printed circuit, so that application of a voltage between the two parts of the circuit operates the igniting mechanism 6.
The head 8 of the igniting mechanism is a conventional electric matchhead, in which a Nichrome wire is surrounded by a composition which combusts when a suitable current passes through the wire. The Nichrome wire is connected to the wires 5 of the mechanism. The wires 5 of the igniting mechanism 6 pass through a hole 30 formed in the disc 29 and the head is located in the pyrotechnic composition 11. The hole 30 is sealed with an epoxy adhesive; during the manufacture of the device, when the igniting mechanism 6 has been soldered to the printed circuit board, the member 27 is inserted in the case 1, epoxy adhesive is spread around the base of the igniting mechanism 6 and the slot 7 plugged with it, and the member 29 is inserted in the cartridge case 1 and pushed towards the base until the adhesive rises up through the hole 30 and seals it.
A thin mill-board disc 32 covered on its lower surface by a layer of aluminum foil 33 is positioned in the cartridge case ll above the casing housing the composition Ill. The edges of the aluminum foil 33 are turned around the edges of the disc 32 and the foil makes electrical contact with the inner wall of the cartridge case 1. In this way, accidental operation of the igniting mechanism 6 due to the presence of a strong electric field is prevented.
In operation, a suitable voltage is applied between the regions 2 and 3 of the printed circuit board, thereby operating the igniting mechanism 6 and causing the pyrotechnic composition 11 to ignite. The combustion of the composition 11 results in the casing containing it rupturing the discs 19, 23 and 28 being displaced, and the production of a flash and report.
I claim:
1. 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 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 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.
2. 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.
3. 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.
4. 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 electricallyoperated igniting means and said (open end of said) rupturable closure. 5. 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.
6. 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 flashproducing 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 por- Slve.
Claims (6)
1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US4348370A | 1970-06-04 | 1970-06-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3780656A true US3780656A (en) | 1973-12-25 |
Family
ID=21927390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00043483A Expired - Lifetime US3780656A (en) | 1970-06-04 | 1970-06-04 | Pyrotechnic devices |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3780656A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5281485U (en) * | 1976-12-14 | 1977-06-17 | ||
| US4130060A (en) * | 1975-12-15 | 1978-12-19 | Pains - Wessex Limited | Pyrotechnic devices |
| US4374494A (en) * | 1979-11-09 | 1983-02-22 | Societe E. Lacroix-Tous Artifices | Electro-magnetic decoy-launcher ammunition |
| US4669354A (en) * | 1985-05-02 | 1987-06-02 | The United States Of America As Represented By The Administrator, Of The National Aeronautics And Space Administration | Fully redundant mechanical release actuator |
| US6601514B1 (en) * | 1998-08-11 | 2003-08-05 | Dynamit Nobel Gmbh Explosivstoff-Und Systemtechnik | Externally controlled ignition unit with integrated electronic system for triggering a restraint system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2462135A (en) * | 1944-04-06 | 1949-02-22 | Leslie A Skinner | Rocket primer |
| US2977878A (en) * | 1954-01-13 | 1961-04-04 | Christian F Kinkel | Detonator |
| US3051085A (en) * | 1958-11-24 | 1962-08-28 | Del Mar Eng Lab | Pyrotechnic flare |
| US3298311A (en) * | 1965-09-07 | 1967-01-17 | Remington Arms Co Inc | Smoke flare |
-
1970
- 1970-06-04 US US00043483A patent/US3780656A/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2462135A (en) * | 1944-04-06 | 1949-02-22 | Leslie A Skinner | Rocket primer |
| US2977878A (en) * | 1954-01-13 | 1961-04-04 | Christian F Kinkel | Detonator |
| US3051085A (en) * | 1958-11-24 | 1962-08-28 | Del Mar Eng Lab | Pyrotechnic flare |
| US3298311A (en) * | 1965-09-07 | 1967-01-17 | Remington Arms Co Inc | Smoke flare |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4130060A (en) * | 1975-12-15 | 1978-12-19 | Pains - Wessex Limited | Pyrotechnic devices |
| JPS5281485U (en) * | 1976-12-14 | 1977-06-17 | ||
| US4374494A (en) * | 1979-11-09 | 1983-02-22 | Societe E. Lacroix-Tous Artifices | Electro-magnetic decoy-launcher ammunition |
| US4669354A (en) * | 1985-05-02 | 1987-06-02 | The United States Of America As Represented By The Administrator, Of The National Aeronautics And Space Administration | Fully redundant mechanical release actuator |
| US6601514B1 (en) * | 1998-08-11 | 2003-08-05 | Dynamit Nobel Gmbh Explosivstoff-Und Systemtechnik | Externally controlled ignition unit with integrated electronic system for triggering a restraint system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3791302A (en) | Method and apparatus for indirect electrical ignition of combustible powders | |
| US2696191A (en) | Electrically operated primer | |
| US4354432A (en) | Hot-wire ignition initiator for propellant charges | |
| US2459854A (en) | Grenade projector | |
| US3780656A (en) | Pyrotechnic devices | |
| US3831523A (en) | Electroexplosive device | |
| US4014262A (en) | Blast simulator | |
| US2934014A (en) | Igniter assemblies | |
| US3211097A (en) | Pyrogen squib | |
| US2564209A (en) | Explosive operated motor for rip cord | |
| US2712575A (en) | Squib switch | |
| US3062146A (en) | Primer | |
| US2887054A (en) | Blasting initiator | |
| US2386211A (en) | Electrically actuated cartridge | |
| US3298306A (en) | Electro-explosive device | |
| US399879A (en) | James weir graydon | |
| US2974592A (en) | Cartridge | |
| US3719148A (en) | Primer for electric and percussion fuses for cartridge ammunition | |
| US3324794A (en) | Smoke grenade | |
| US3088006A (en) | Method of internally venting gasless delays | |
| US3125025A (en) | Pyrotechnic igniter | |
| US3972287A (en) | Cartridge | |
| US3399622A (en) | Reloadable shotgun shell device | |
| US3257946A (en) | Electrically triggered squib | |
| US3111089A (en) | Frangible firing device |