EP0045226A1 - Mittels Reibung oder heisser Gase zündbarer Verschluss - Google Patents
Mittels Reibung oder heisser Gase zündbarer Verschluss Download PDFInfo
- Publication number
- EP0045226A1 EP0045226A1 EP19810401044 EP81401044A EP0045226A1 EP 0045226 A1 EP0045226 A1 EP 0045226A1 EP 19810401044 EP19810401044 EP 19810401044 EP 81401044 A EP81401044 A EP 81401044A EP 0045226 A1 EP0045226 A1 EP 0045226A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- igniter plug
- plug according
- pyrotechnic
- cover
- perforation
- 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.)
- Granted
Links
- 239000007789 gas Substances 0.000 title description 7
- 239000000203 mixture Substances 0.000 claims abstract description 21
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 9
- 238000010304 firing Methods 0.000 description 7
- 239000004698 Polyethylene Substances 0.000 description 4
- IMACFCSSMIZSPP-UHFFFAOYSA-N phenacyl chloride Chemical compound ClCC(=O)C1=CC=CC=C1 IMACFCSSMIZSPP-UHFFFAOYSA-N 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 239000003491 tear gas Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- 229910000737 Duralumin Inorganic materials 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 239000002990 reinforced plastic Substances 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 206010061218 Inflammation Diseases 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000004054 inflammatory process Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C14/00—Mechanical fuzes characterised by the ammunition class or type
- F42C14/02—Mechanical fuzes characterised by the ammunition class or type for hand grenades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
- F42B3/117—Initiators therefor activated by friction
Definitions
- the invention relates to igniter plugs which are intended for igniting pyrotechnic articles, in particular intervention grenades such as smoke grenades or tear gas grenades; these igniter plugs comprise a hollow body receiving a pyrotechnic ignition chain which is arranged longitudinally and the first element of which is a composition sensitive to friction.
- Such igniter plugs are known, and for example French patent 2,032,661 describes a primer whose hollow body is a cylindrical-conical envelope which is filled with a flammable substance and whose outer part of the female cone is covered by a composition. sensitive to friction, the inflammation of this composition being ensured by the penetration of a male cone which is held in the released position by a flexible bellows.
- a primer can be activated by a slight pushing force on the male cone, which is well suited for manual firing, but is not suitable for firing from a pyrotechnic propulsion system such as a grenade launcher.
- the present invention aims to create a versatile igniter plug which can be activated either manually, or from a propulsion system or ejection by combustion gas of a pyrotechnic charge, and which is simple to operate and reliable, and, the invention is characterized in that the hollow body of the igniter plug is extended by a removable cover, which resists thermodynamic conditions of pyrotechnic ejection systems for pyrotechnic articles, which provides an expansion chamber around the friction-sensitive composition of the ignition chain, and which is provided with at least one perforation opening into this expansion chamber .
- the pyrotechnic propulsion system is a grenade launcher operating with a gas generator cartridge such as "blank" cartridges
- a gas generator cartridge such as "blank” cartridges
- the removable cover and the body of the igniter plug can withstand temperatures for a few hundredths of a second up to around 3200 ° Kelvin and at pressures up to 250 bar, and these parts can be made for example of steel, duralumin or reinforced plastic.
- the perforation which opens into the expansion chamber is completely preformed and is initially free.
- the perforation initially does not open completely and is not formed definitively until the application of the thermodynamic conditions of the pyrotechnic ejection systems.
- the cover comprises at least one longitudinal perforation, and advantageously this cover only has a single longitudinal perforation situated in the extension of the pyrotechnic ignition chain, the diameter of this longitudinal perforation having a diameter of between 0.5 millimeter and 6 millimeters, and more particularly between 1.2 and 3 millimeters.
- the expansion chamber is limited by a surface of revolution, in particular cylindrical, and the volume of this chamber is greater than 0.2 cubic centimeter and is more particularly between 0.5 and 3.2 cm, the largest volumes being advantageously combined with the larger perforation diameters indicated above.
- the ignition pyrotechnic chain can be constituted by a pyrotechnic match such as those which are commercially available, and no transformation of this match is necessary insofar as an expansion chamber is used in combination with at least one perforation, and, advantageously, the composition sensitive to friction is flammable by a calorific contribution of less than 20 joules, this composition being based on potassium chlorate, and the ignition chain comprising a pyrotechnic delay and a pyrotechnic wick.
- the perforation of the cover could initially not open completely, and not be formed definitively until the application of the thermodynamic conditions of the pyrotechnic ejection systems, the projection of particles or degraded material which does not appreciably disturb the ignition of the pyrotechnic match of the igniter plug.
- the perforation is completely preformed and is temporarily obstructed by destructible means under the thermodynamic conditions of pyrotechnic ejection systems, and, according to a second construction form, the preformed perforation corresponds to a thinned area of the cover. removable, this zone also being destructible under the thermodynamic conditions of pyrotechnic ejection systems.
- the destructible temporary obstruction means consist of a strip, in particular a disc, for example made of plastic, which is fixed outside the bottom of the cover. , this strip advantageously occupying substantially the entire surface of the bottom and constituting the rubbing of the plug.
- the thinned area of the removable cover is located in the axis of this cover, and the interior surface of the bottom of the cover is at least partially a substantially conical surface, this cover being advantageously made of plastic, and this inner surface being provided with reinforcing ribs which can be arranged radially and provide a free area around the center of this cover.
- the hollow body (1) is made of mild steel with a hexagonal section and has a thread at each of its ends, the lower thread (2) being intended to fixing the igniter plug on the intervention grenade, and the upper thread (3) receiving the removable cover (4).
- the body (1) is pierced axially, and the pyrotechnic match (5) is fixed by bonding in this bore, this match manufactured and marketed by the company HENDRYCKX being constituted by a shouldered tubular sheath (6) which supports the composition sensitive to friction (7) and which receives a pyrotechnic delay of 3 seconds (8) and a pyrotechnic wick (9) impregnated with black powder.
- the removable cover (4) is also made of mild steel with a hexagonal section and has an internal threaded recess defining an expansion chamber of 1.1 cm 3 (10), the bottom of this cover being provided with an axial perforation ( 11).
- This igniter plug was used experimentally on several types of grenade, in particular the tear gas grenades manufactured and marketed by the SNPE, and all the shots carried out were satisfactory as well the manual shots as the shootings from rifles of caliber 7.5 mm or 7.62 mm loaded with gas generating cartridges.
- Manual firing requires unscrewing the removable cover (4) in order to be able to rub the composition (7) which initiates the pyrotechnic ignition chain, the wiper being able to be advantageously placed on the upper external face of this cover (4).
- the firing from a launch tube fitted with a pyrotechnic gas generator is carried out by leaving the removable cover (4), the combustion gases penetrating through the perforation (11) and determining an increase in energy sufficient to igniting the composition (7) while limiting the pressure build-up gradient so as not to spray this composition (7), and these operating conditions in launch tube will be better understood by considering the results of the tests which are mentioned above. below.
- the hollow body 1a is made of polyethylene and has in its central part a hexagonal section while each of its ends is threaded, the lower thread 2 being intended for fixing the igniter plug. on the intervention grenade, and the upper thread 3 receiving the removable cover 4.
- the body 1a is pierced axially, and the pyrotechnic match 5 is fixed by bonding in this bore, this match manufactured and marketed by the company HENDRYCKX being constituted by a shouldered tubular sheath 6 which supports the composition sensitive to friction 7 and which receives a pyrotechnic delay 3 seconds 8 and a pyrotechnic wick 9 impregnated with black powder.
- the removable cover 4a which is also made of polyethylene, has a hexagonal section and has a partially threaded internal recess defining an expansion chamber 10a of approximately 3 1 cm 3 .
- the bottom of this cover is provided with an axial perforation 11a, and its outer surface has a counterbore which receives the disc 12, the upper face of which is covered by the composition 13 which constitutes the wiper of the pyrotechnic match.
- This disc is made of polyethylene and has an inclined lateral surface so that it can be engaged in the counterbore of the cover, the periphery of which is machined obliquely, the sealing and the complementary fixing of this disc on the cover being ensured by gluing.
- Figures 3 and 4 correspond to a second removable cover, which is adaptable to the hollow body shown in Figure 2, and which leads to entirely similar operating conditions.
- This cover is entirely made of polyethylene and can be obtained directly by molding, only the composition 21 constituting the wiper being attached to the outer surface of the bottom.
- the outer lateral surface of this cover is provided with vertical grooves and the bottom 22 is internally reinforced by a set of eight radial ribs 23 with parallel sides joining at a bevel. These ribs are regularly distributed in the expansion chamber 24 and provide a free circular zone 25 in the central zone of the bottom which has the most reduced thickness, the inner surface of this bottom being frustoconical.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8016775 | 1980-07-30 | ||
FR8016775A FR2487968A1 (fr) | 1980-07-30 | 1980-07-30 | Bouchon allumeur initiable par frottement ou par gaz chauds |
FR8027753 | 1980-12-30 | ||
FR8027753A FR2497337A2 (fr) | 1980-12-30 | 1980-12-30 | Bouchon allumeur initiable par frottement ou par gaz chauds |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0045226A1 true EP0045226A1 (de) | 1982-02-03 |
EP0045226B1 EP0045226B1 (de) | 1984-09-12 |
Family
ID=26221919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19810401044 Expired EP0045226B1 (de) | 1980-07-30 | 1981-06-30 | Mittels Reibung oder heisser Gase zündbarer Verschluss |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0045226B1 (de) |
BR (1) | BR8104895A (de) |
DE (1) | DE3166016D1 (de) |
PT (1) | PT73449B (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2655139A1 (fr) * | 1989-11-30 | 1991-05-31 | Alsetex | Bouchon-retard pour grenade lancee a la main ou tiree au fusil. |
KR102581020B1 (ko) * | 2022-08-10 | 2023-09-21 | 국방과학연구소 | 열전지용 착화기 및 그것을 포함하는 열전지 시스템 |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR410211A (fr) * | 1909-12-06 | 1910-05-14 | Siegfried Hoffmann | Projectile avec fusée à temps |
GB191508708A (en) * | 1915-06-12 | 1919-03-13 | Frederick Marten Hale | Improvements in and pertaining to Projectiles. |
FR503172A (fr) * | 1917-01-24 | 1920-06-04 | Eugene Andre Francois Naud | Dispositif de mise de feu pour grenades à fusil et engins analogues |
US1548693A (en) * | 1924-05-15 | 1925-08-04 | Fleming R Weaver | Firing mechanism for pyrotechnics and the like |
FR889122A (fr) * | 1942-12-16 | 1943-12-31 | Pyrotechnische Fabriken G M B | Dispositif d'allumage de la charge de propulsion de projectiles spéciaux |
FR890779A (fr) * | 1939-12-02 | 1944-02-17 | Pyrotechnische Fabriken G M B | Fusée pour culot de projectiles |
FR1202054A (fr) * | 1957-09-20 | 1960-01-07 | Dispositif de propulsion pour projectile explosif tiré par un fusil | |
GB1242227A (en) * | 1968-02-08 | 1971-08-11 | Imp Metal Ind Kynoch Ltd | Missiles comprising a rocket motor and a warhead-arming delay device |
FR2102570A5 (en) * | 1970-08-10 | 1972-04-07 | France Etat | Gas solid retardants for fireworks - less sensitive to shock |
US3690260A (en) * | 1969-07-03 | 1972-09-12 | Josef Prior | Flame sensitive ignitor |
FR2152029A5 (de) * | 1971-09-03 | 1973-04-20 | Olin Corp |
-
1981
- 1981-06-30 DE DE8181401044T patent/DE3166016D1/de not_active Expired
- 1981-06-30 EP EP19810401044 patent/EP0045226B1/de not_active Expired
- 1981-07-29 PT PT7344981A patent/PT73449B/pt unknown
- 1981-07-29 BR BR8104895A patent/BR8104895A/pt unknown
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR410211A (fr) * | 1909-12-06 | 1910-05-14 | Siegfried Hoffmann | Projectile avec fusée à temps |
GB191508708A (en) * | 1915-06-12 | 1919-03-13 | Frederick Marten Hale | Improvements in and pertaining to Projectiles. |
FR503172A (fr) * | 1917-01-24 | 1920-06-04 | Eugene Andre Francois Naud | Dispositif de mise de feu pour grenades à fusil et engins analogues |
US1548693A (en) * | 1924-05-15 | 1925-08-04 | Fleming R Weaver | Firing mechanism for pyrotechnics and the like |
FR890779A (fr) * | 1939-12-02 | 1944-02-17 | Pyrotechnische Fabriken G M B | Fusée pour culot de projectiles |
FR889122A (fr) * | 1942-12-16 | 1943-12-31 | Pyrotechnische Fabriken G M B | Dispositif d'allumage de la charge de propulsion de projectiles spéciaux |
FR1202054A (fr) * | 1957-09-20 | 1960-01-07 | Dispositif de propulsion pour projectile explosif tiré par un fusil | |
GB1242227A (en) * | 1968-02-08 | 1971-08-11 | Imp Metal Ind Kynoch Ltd | Missiles comprising a rocket motor and a warhead-arming delay device |
US3690260A (en) * | 1969-07-03 | 1972-09-12 | Josef Prior | Flame sensitive ignitor |
FR2102570A5 (en) * | 1970-08-10 | 1972-04-07 | France Etat | Gas solid retardants for fireworks - less sensitive to shock |
FR2152029A5 (de) * | 1971-09-03 | 1973-04-20 | Olin Corp |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2655139A1 (fr) * | 1989-11-30 | 1991-05-31 | Alsetex | Bouchon-retard pour grenade lancee a la main ou tiree au fusil. |
KR102581020B1 (ko) * | 2022-08-10 | 2023-09-21 | 국방과학연구소 | 열전지용 착화기 및 그것을 포함하는 열전지 시스템 |
Also Published As
Publication number | Publication date |
---|---|
PT73449A (fr) | 1981-08-01 |
DE3166016D1 (en) | 1984-10-18 |
BR8104895A (pt) | 1982-04-13 |
EP0045226B1 (de) | 1984-09-12 |
PT73449B (fr) | 1982-08-19 |
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