EP0246368B1 - Dispositif pour distribuer des leurres électromagnétiques - Google Patents

Dispositif pour distribuer des leurres électromagnétiques Download PDF

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Publication number
EP0246368B1
EP0246368B1 EP19860302371 EP86302371A EP0246368B1 EP 0246368 B1 EP0246368 B1 EP 0246368B1 EP 19860302371 EP19860302371 EP 19860302371 EP 86302371 A EP86302371 A EP 86302371A EP 0246368 B1 EP0246368 B1 EP 0246368B1
Authority
EP
European Patent Office
Prior art keywords
chaff
retainer
primary
cartridge
payload
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
Application number
EP19860302371
Other languages
German (de)
English (en)
Other versions
EP0246368A1 (fr
Inventor
Ian Douglas Pollicott
Brian Butters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chemring Ltd
Original Assignee
Chemring Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chemring Ltd filed Critical Chemring Ltd
Priority to EP19860302371 priority Critical patent/EP0246368B1/fr
Priority to DE8686302371T priority patent/DE3678952D1/de
Publication of EP0246368A1 publication Critical patent/EP0246368A1/fr
Application granted granted Critical
Publication of EP0246368B1 publication Critical patent/EP0246368B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F42B12/56—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies
    • F42B12/70—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies for dispensing radar chaff or infrared material

Definitions

  • This invention relates to a chaff dispenser for radar reflective chaff.
  • Chaff consists of fine electrically conducting filaments or foils which reflect radar waves and is used to confuse and distract weapon systems which rely on the use of radar.
  • the chaff is dispensed and dispersed in a variety of different ways depending upon the effect to be created.
  • FIGS. 1a and 1b of the accompanying drawings are perspective and cross-sectional views respectively.
  • the cartridge shown is designed primarily for use with electronic counter measure systems mounted on aircraft and was developed to provide maximum radar coverage with ease of handling.
  • the cartridge illustrated consists of plastics liner 1 retaining a plurality of chaff dipoles 2 and having, at one end, a pyrotechnic squib 3. Disposed between the squib 3 and the chaff 2 is a piston 4 and felt pad 5 for protecting the chaff dipoles on ejection.
  • a releasable end cap 6 At the other end of the plastics liner 1 is a releasable end cap 6.
  • the pyrotechnic squib 3 On actuation the pyrotechnic squib 3 generates a gas pressure behind the piston 4 which drives the chaff along the plastics liner 1 ejecting the chaff from the other end.
  • the chaff used is determined by the response required but typically may be 0.001 inch (25.4 microns) diameter aluminium coated glass dipoles.
  • a similar chaff cartridge is shown in published U.K. Patent specification No.A 2075155 in which the end cap and piston are each provided with a sealing ring to provide a moisture proof barrier protecting the chaff dipoles retained by the plastics liner.
  • a cartridge for dispensing chaff in accordance with the preamble of claim 1 and in which the cartridge has at least two payloads each fitted with its own explosive charge so as to be ignited successively in order to dispense the chaff payloads in separate successive groups.
  • a chaff dispenser comprising a primary retainer, a chaff payload within the primary retainer, a pyrotechnic charge and piston means disposed between the pyrotechnic charge and the chaff payload whereby on actuation of the pyrotechnic charge the chaff payload is ejected from the primary retainer, the chaff payload being contained in at least one elongate secondary retainer comprising two separable parts characterised in that the separable parts of the secondary retainer are hinged together along a longitudinally extending hinge line, and the piston means comprises an end portion of a secondary retainer so as to be integral therewith whereby, on actuation, the secondary retainer or retainers and the chaff payload therein are ejected from the primary retainer.
  • the end cap may include a plug portion seated within the primary retainer and having a circumferentially extending seal engaging with the primary retainer.
  • the other sealing means may be a sleeve surrounding the pyrotechnic charge and sealing between the charge and the primary retainer whereby the cartridge is moisture-resistant.
  • the chaff packaged within the retainer may be wrapped in suitable wrapping material.
  • the chaff dispenser is preferably a chaff cartridge.
  • Figure 2 is a longitudinal cross-section of the chaff cartridge of the present invention
  • Figure 3 is an enlarged cross-sectional view of one variety of end cap on the centre line of Fig. 2
  • Figure 4 is an enlarged cross-sectional view of the sealing sleeve on the centre line of Fig.2
  • Figure 5 is a perspective view of the secondary retainer
  • Figure 6 is a diagrammatic view of the beginning of ejection.
  • a chaff cartridge 10 consists of a primary plastics tubular retainer 11 for retaining a plurality of chaff dipoles 12.
  • the chaff dipoles 12 are packed into a secondary plastics retainer 13 made of two separable halves 14 and 15 which are hinged together.
  • One end of the primary plastics retainer 11 is closed by an end cap 16, which may or may not seal against the ingress of moisture, whilst the other end receives a pyrotechnic squib 17 surrounded by a sealing sleeve 18.
  • a piston 19 Disposed intermediate the pyrotechnic squib 17 and the chaff dipoles 12 is a piston 19.
  • end cap 16 shown is made of elastomeric material such as rubber and has, a flange 20 which abuts against the end of the primary plastics retainer 11, a plug portion 21 and a circumferentially-extending sealing lip 22 which seals firmly against the inside surface of the primary plastics retainer.
  • the plug portion 21 is provided, at two opposed sides, with two locating lugs 24 (only one shown) which engage in respective locating holes 25 in the primary plastics retainer 11.
  • the sealing sleeve 18 seals between the pyrotechnic squib 17 and an annular portion 26 of the primary retainer 11.
  • the sealing sleeve 18 has three external circumferential beads 27, 28, 29 and internal bead 30.
  • An end flange 31 is provided to locate the sleeve 18 in the desired position when inserted.
  • the secondary retainer 13 in order to strengthen the secondary retainer 13 to enable force transmission from the piston 19 to the cap 16, the secondary retainer is provided with longitudinal strengthening ribs 32.
  • the pyrotechnic squib 17 causes a build-up in pressure behind the piston 19 which causes the piston 19 to push the chaff in the direction of arrow A in Figure 6.
  • the secondary retainer 13 transmits the force behind the piston 19 to the end cap 16 and pushes it out of the end of the primary retainer 11 as illustrated in Figure 6. Then, once the secondary retainer 13 is free of the primary retainer 11, the two parts 14, 15 separate along the hinge line allowing dispersal of the chaff to form the desired cloud.
  • chaff cartridge of the present invention has several advantages of the known chaff cartridges described above:-
  • the chaff cartridge of the present invention is designed to operate in the temperature limits of -54°C to +95°C and therefore the squib sealing sleeve is suitably a polyurethane material and the second retainer a PVC or polycarbonate material.
  • the secondary retainer may not completely encapsulate the chaff and the end cap may form an end of the secondary retainer. If desired, there may be more than one secondary retainer within the primary retainer.
  • the chaff cartridge of the present invention may be used with known dispenser units and mounted in banks of 30 at, for example, two or four positions on an aircraft.
  • the chaff dispenser may be of any other form although in the present invention it is shown as a cartridge of rectangular cross-section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Radar Systems Or Details Thereof (AREA)

Claims (5)

  1. Distributeur de leurres (10) comportant un conteneur primaire (11), une charge de leurres (12) à l'intérieur du conteneur primaire (11), une charge pyrotechnique (17), et des moyens formant piston (19) disposés entre la charge pyrotechnique (17) et la charge de leurres (12) du sorte que lors de l'actionnement de la charge pyrotechnique (17), la charge de leurres (12) est éjectée à partir du conteneur primaire (11), la charge de leurres étant contenue dans au moins un second conteneur allongé (13) qui comporte deux parties séparables (14,15), caractérisé en ce que les parties séparables (14, 15) du conteneur secondaire (13) sont articulées l'une à l'autre selon une ligne d'articulation s'étendant longitudinalement et les moyens formant piston (19) comportant une partie d'extrémité du conteneur secondaire (13) de façon à être solidaire de ce dernier, de sorte que, lors du fonctionnement, le conteneur secondaire ou les conteneurs secondaires et la charge de leurres qu'ils contiennent sont éjectées à partir du conteneur primaire.
  2. Distributeur de leurres selon la revendication 1, dans lequel le distributeur (10) est une cartouche comportant une première et une seconde extrémités et comporte des moyens (16) pour assurer l'étanchéité de la première extrémité du conteneur primaire, lesdits moyens étant distincts du second conteneur.
  3. Cartouche de leurres selon la revendication 2, dans laquelle la charge pyrotechnique (17) est à la seconde extrémité et la cartouche comporte des moyens d'étanchéité (18) autour de la charge pyrotechnique (17).
  4. Cartouche de leurres selon la revendication 2, dans laquelle les moyens d'étanchéité (16) à ladite première extrémité du conteneur primaire (11) consistent en un capuchon d' étanchéité séparé comportant une partie formant bouchon (21) reposant à l'intérieur de ladite première extrémité et assurant l'étanchéité contre le conteneur primaire (11).
  5. Distributeur de leurres selon l'une quelconque des revendications précédentes, dans lequel la charge de leurres est enveloppée d'un matériau d'enveloppement.
EP19860302371 1986-03-27 1986-03-27 Dispositif pour distribuer des leurres électromagnétiques Expired - Lifetime EP0246368B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19860302371 EP0246368B1 (fr) 1986-03-27 1986-03-27 Dispositif pour distribuer des leurres électromagnétiques
DE8686302371T DE3678952D1 (de) 1986-03-27 1986-03-27 Dueppelabwurfvorrichtung.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19860302371 EP0246368B1 (fr) 1986-03-27 1986-03-27 Dispositif pour distribuer des leurres électromagnétiques

Publications (2)

Publication Number Publication Date
EP0246368A1 EP0246368A1 (fr) 1987-11-25
EP0246368B1 true EP0246368B1 (fr) 1991-04-24

Family

ID=8195951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860302371 Expired - Lifetime EP0246368B1 (fr) 1986-03-27 1986-03-27 Dispositif pour distribuer des leurres électromagnétiques

Country Status (2)

Country Link
EP (1) EP0246368B1 (fr)
DE (1) DE3678952D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11053007B1 (en) 2019-12-30 2021-07-06 The United States Of America As Represented By The Secretary Of The Army Device for dispensing pyrophoric particulate materials

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5033385A (en) * 1989-11-20 1991-07-23 Hercules Incorporated Method and hardware for controlled aerodynamic dispersion of organic filamentary materials
GB9301321D0 (en) * 1993-01-23 1993-03-17 Chemring Ltd Dispenser
US5954563A (en) * 1998-05-26 1999-09-21 Spriggs; Harry J Device for propelling novelty items
ES2190749B1 (es) 2001-11-30 2004-06-16 Fractus, S.A Dispersores "chaff" multinivel y/o "space-filling", contra radar.
FR2840977B1 (fr) * 2002-06-12 2004-09-03 Giat Ind Sa Dispositif et munition de protection d'un vehicule ou d'une plate-forme fixe contre une menace
US10962337B2 (en) 2019-09-03 2021-03-30 Imi Systems Ltd. Cartridge for providing delayed chaff for use as a decoy for RF radars
US11970270B2 (en) * 2021-03-18 2024-04-30 Bae Systems Information And Electronic Systems Integration Inc. Chaff dispensing systems and methods of operation
CN114590407B (zh) * 2022-01-30 2023-05-09 中国人民解放军陆军工程大学 一种箔条布撒器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031828A (en) * 1976-01-28 1977-06-28 The United States Of America As Represented By The Secretary Of The Air Force Pressurized chaff canister
FR2436363A1 (fr) * 1978-09-15 1980-04-11 Lacroix E Cartouche a plusieurs charges de leurres distinctes
DE3015719C2 (de) * 1980-04-24 1984-03-01 Diehl GmbH & Co, 8500 Nürnberg Düppel-Patrone zum Flugzeug-Selbstschutz
FR2507306B1 (fr) * 1981-06-03 1985-05-31 Lacroix E Tous Artifices Dispositif lance-leurres electromagnetiques, notamment pour aeronef
DE3403936A1 (de) * 1984-02-04 1985-08-08 Diehl GmbH & Co, 8500 Nürnberg Drallgeschoss

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11053007B1 (en) 2019-12-30 2021-07-06 The United States Of America As Represented By The Secretary Of The Army Device for dispensing pyrophoric particulate materials

Also Published As

Publication number Publication date
DE3678952D1 (de) 1991-05-29
EP0246368A1 (fr) 1987-11-25

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