WO1992012523A1 - Contacteur d'impact notamment pour projectiles a charge explosive - Google Patents
Contacteur d'impact notamment pour projectiles a charge explosive Download PDFInfo
- Publication number
- WO1992012523A1 WO1992012523A1 PCT/FR1992/000012 FR9200012W WO9212523A1 WO 1992012523 A1 WO1992012523 A1 WO 1992012523A1 FR 9200012 W FR9200012 W FR 9200012W WO 9212523 A1 WO9212523 A1 WO 9212523A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sleeve
- impact
- contact
- base
- fingers
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/06—Electric contact parts specially adapted for use with electric fuzes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/14—Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch
- H01H35/145—Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch operated by a particular acceleration-time function
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/14—Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch
- H01H35/146—Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch operated by plastic deformation or rupture of structurally associated elements
Definitions
- the present invention relates to the technical field of triggering the initiation or the explosion of a pyrotechnic charge in relation to an impact being established between a target and a projectile.
- the invention relates, more specifically, to the initiation or the explosion of an explosive charge from a source of electrical energy, generally on board, responsible for initiating the
- the invention aims to trigger, upon impact, the explosive charge of a munition, preferably of large caliber.
- the closure of the electric detonator supply circuit is dependent on the operation of an impact switch located at the front of the projectile.
- the object of the invention is to propose an impact switch precisely designed to take these variable factors into account, so that the triggering of the explosive charge, upon impact, does not occur during a possible passage through a more or less dense vegetation, but nevertheless light in character, but on the other hand surely surely, of course, in the event of a frontal impact, but also of impact according to an incidence any compared to normal to the target, up to 80 or more.
- the impact contactor according to the invention is characterized in that it comprises:
- a support base made of insulating material, carrying at least two conductive terminals and defining an axis of symmetry
- a contact sleeve centered coaxially on the base, in contact with one of the terminals and carrying, in a plane transverse to the axis of symmetry, conductive fingers or touchaux, in electrical contact with the sleeve, mounted Free of slide radially to the axis and pushed in centrifugal movement by elastic members against an insulating sheath threaded outside the sleeve,
- a conductive slide movable by inertia on the axis of symmetry against the action of a holding spring, guided in the base, maintained in permanent electrical contact with the case and able to cooperate with the fingers.
- Fig. 1 is a schematic view illustrating
- fig. 2 is an axial couoe of the impact contactor according to the invention.
- Fig. 1 shows an explosive projectile 1, preferably of large caliber, internally containing an explosive charge 2 the initiation or explosion of which is produced by a detonator 3 electrically powered from a source 4 which may be one or more capacitors charged by means of a
- piezoelectric generator activated by inertia when the projectile starts or launches 1.
- detonator 3 from the source 4 is provided by an electridue circuit, not shown in the drawings, the closing of which is controlled by an impact contactor 5 adapted to the front part of the projectile 1.
- Fig. 2 shows, in cross-elevation, the impact switch 5 which comprises a base 6 made of insulating material comprising adaptation means on the body of the projectile 1.
- the emoase 6 is crossed by at least two contact terminals 7 and 8,
- the base 6 is produced in the form of a body having an external profile dp revolution with an axis of symmetry x-x '.
- connection terminals 7 and 8 can be mounted individually in or on the base 6 or, again, the latter can be molded directly on said terminals. Different embodiments of the terminals can therefore be retained without this being considered to depend essentially on the invention. In all cases, terminals 7 and 8 are, from
- the impact contactor further comprises a sleeve 13 of conductive metal which is threaded, by a skirt 14 which it delimits, onto a centering 15 of the base 6.
- the centering 15 can be formed directly by the base 6 or, preferably, by an adapter 16 of insulating material which is mounted coaxially on the base 6.
- the conformation of the adapter 16 is defined so that one of the blades, for example the blade 12, is placed in contact with the skirt 14, whereas on the contrary the second blade, for example the blade 11, is kept at a distance and isolated from said sleeve.
- Such a state can be established by means of an insulating sheath 17 threaded externally on the skirt 14 of the sleeve 13 which has, for this purpose, a supporting shoulder 18.
- the sheath 17 can be made in one piece or , on the contrary, by two rings 17a, 17b.
- the rod 13 internally forms a thick crown 19 which delimits, in a transverse plane y-y '
- Each Housing 20 contains a finger or touched 21 Free to slide in the radial Housing 20 and pushed, in a state of centrifugal abutment against the sheath 17, by means of an elastic member 22.
- the fingers 21 are in permanent electrical contact with the sleeve by friction in their housing and by contact with the elastic members 22.
- the sliding fingers 21 are thus normally placed in a stable state of retraction in which their internal ends 23 are flush with the internal peripheral wall 19a of the crown 19.
- the base assembly 6, optionally adapter 16, sleeve 14 and sheath 17, is held together in a coaxial arrangement by a case 24 which is crimped on the base 6 and the sheath 17, so as to maintain permanent electrical contact between it -same and Blade 11 of Terminal 7.
- the case 24, which is in a cylindrical tubular shape of small thickness, comprises a front end part shaped to extend away from and without contact with the conductive sleeve 13.
- the end part has a front wall 25 which has, for example, a hollow stamped 26 ensuring, by any suitable means and, in particular, by an opening 27 centered on the axis x-x ', the guidance of a movable slide 28 made of a conductive metal.
- the slide 28 has a foot 29 of larger cross section, which is guided inside a well 30 formed coaxially in the base 6 and, more particularly in the example of
- the foot 29 has a cylindrical section of diameter smaller than the passage section
- the slider 28 is associated with an elastic holding member 31, for example formed by a spring hé li co ⁇ da l mounted under stress between the pressed 26 and the foot 29, for maintain the latter inside the well 30, in an erasing position relative to the transverse plane yy 'and, above all, relative to the housings 20 of the fingers 21.
- the fingers 21 have a length such that '' they can never come into contact with the slide 28 in the stable erasing position of the foot 29, even in the event of maximum axial stress against the action of the springs 22.
- the length of these fingers is chosen so that 'They can be brought into contact with the foot 29 in the state of at least partial extension of the latter.
- the sleeve 13 comprises, opposite the skirt 14, a tubular portion 32 in which is centered a tubular spacer 33 bearing against the crown 19 to represent a stop for the front wall 25 during
- the spacer 33 is made of an insulating material of relatively low crush resistance.
- the contactor according to the invention is completed by a cap 34 made of a relatively hard material, with a certain thickness to, on the one hand, protect and guarantee
- the cap 34 has, for example, a thread 35 by which it is screwed on the body of projectile 1 to which the impact contactor has been fitted.
- the conductor 9 is linked to a first circuit internal to the contactor, via the terminal 7, of the blade 11, of the case 24, or even of the slide 28, a while the second
- conductor 10 is in electrical connection with a second internal circuit formed by terminal 8, blade 12 and sleeve 13, or even fingers 21.
- the cap 34 thus protects the front part of the case 24 which is preserved against any risk of deformation and crushing.
- the springs 22 can allow a centripetal radial sliding of some of the fingers 21, simultaneously with a relative axial displacement of the slider 28, as previously stated.
- the stiffness of the springs 22 and 31 are chosen so that, during such contacts with branches, the relative movements of the fingers 21 and of the slide 28 are of sufficiently reduced amplitude that the fingers 21 do not come into contact with the foot 29.
- the cap 34 undergoes a crushing which is imposed on the front part of the conductive case 24.
- the case 24 is brought into contact with the tubular part, at least 32, of the sleeve 13, which closes the circuit between the conductors 9 and 10.
- the impact contactor consists of elementary stackable parts which can be assembled axially, held together by crimping the case 24. Such a contactor can therefore be produced at low cost, in elementary production lines and automated assembly. To this end, provision may be made in the front wall 25 of the case 24 for a hole 40 intended to allow, after pre-assembly of at least some of the constituent elements of the contactor, a verification of the electrical continuity between The different elements assembled.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69203042T DE69203042T2 (de) | 1991-01-09 | 1992-01-09 | Beschleunigungsschalter, insbesondere für geschoss mit explosionsladung. |
AU12437/92A AU649112B2 (en) | 1991-01-09 | 1992-01-09 | Impact contactor, particularly for projectiles with explosive charge |
JP92504157A JPH05505451A (ja) | 1991-01-09 | 1992-01-09 | 爆薬を含む特にミサイルのための衝撃接触器 |
EP92904622A EP0519064B1 (fr) | 1991-01-09 | 1992-01-09 | Contacteur d'impact notamment pour projectiles a charge explosive |
NO92923431A NO923431L (no) | 1991-01-09 | 1992-09-03 | Stoetkontaktor, saerlig for raketter med eksplosive ladninger |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR91/00181 | 1991-01-09 | ||
FR9100181A FR2671427B1 (fr) | 1991-01-09 | 1991-01-09 | Contacteur d'impact notamment pour projectiles a charge explosive . |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992012523A1 true WO1992012523A1 (fr) | 1992-07-23 |
Family
ID=9408537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1992/000012 WO1992012523A1 (fr) | 1991-01-09 | 1992-01-09 | Contacteur d'impact notamment pour projectiles a charge explosive |
Country Status (10)
Country | Link |
---|---|
US (1) | US5271329A (fr) |
EP (1) | EP0519064B1 (fr) |
JP (1) | JPH05505451A (fr) |
AU (1) | AU649112B2 (fr) |
CA (1) | CA2074270A1 (fr) |
DE (1) | DE69203042T2 (fr) |
ES (1) | ES2074876T3 (fr) |
FR (1) | FR2671427B1 (fr) |
WO (1) | WO1992012523A1 (fr) |
ZA (1) | ZA92111B (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070204756A1 (en) * | 2006-01-17 | 2007-09-06 | Rastegar Jahangir S | Energy harvesting power sources for generating a time-out signal for unexploded munitions |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2980773A (en) * | 1952-07-01 | 1961-04-18 | Audley B Leaman | Lateral acceleration switch |
FR79714E (fr) * | 1959-11-06 | 1963-01-11 | Soc Tech De Rech Ind | Perfectionnements à l'amorçage électrique des projectiles à charge creuse |
US3909568A (en) * | 1974-03-28 | 1975-09-30 | Impact O Graph Corp | Impact monitor or shock indicator |
FR2564236A1 (fr) * | 1984-05-09 | 1985-11-15 | France Etat Armement | Contacteur electrique sensible aux chocs |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3038973A (en) * | 1961-02-06 | 1962-06-12 | Alpert Louis | Impact switch |
NL7113085A (fr) * | 1970-11-07 | 1972-05-09 |
-
1991
- 1991-01-09 FR FR9100181A patent/FR2671427B1/fr not_active Expired - Fee Related
-
1992
- 1992-01-08 ZA ZA92111A patent/ZA92111B/xx unknown
- 1992-01-09 CA CA002074270A patent/CA2074270A1/fr not_active Abandoned
- 1992-01-09 JP JP92504157A patent/JPH05505451A/ja active Pending
- 1992-01-09 EP EP92904622A patent/EP0519064B1/fr not_active Expired - Lifetime
- 1992-01-09 WO PCT/FR1992/000012 patent/WO1992012523A1/fr active IP Right Grant
- 1992-01-09 US US07/927,653 patent/US5271329A/en not_active Expired - Fee Related
- 1992-01-09 DE DE69203042T patent/DE69203042T2/de not_active Expired - Fee Related
- 1992-01-09 AU AU12437/92A patent/AU649112B2/en not_active Ceased
- 1992-01-09 ES ES92904622T patent/ES2074876T3/es not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2980773A (en) * | 1952-07-01 | 1961-04-18 | Audley B Leaman | Lateral acceleration switch |
FR79714E (fr) * | 1959-11-06 | 1963-01-11 | Soc Tech De Rech Ind | Perfectionnements à l'amorçage électrique des projectiles à charge creuse |
US3909568A (en) * | 1974-03-28 | 1975-09-30 | Impact O Graph Corp | Impact monitor or shock indicator |
FR2564236A1 (fr) * | 1984-05-09 | 1985-11-15 | France Etat Armement | Contacteur electrique sensible aux chocs |
Also Published As
Publication number | Publication date |
---|---|
CA2074270A1 (fr) | 1992-07-10 |
AU1243792A (en) | 1992-08-17 |
EP0519064A1 (fr) | 1992-12-23 |
ZA92111B (en) | 1992-11-25 |
FR2671427A1 (fr) | 1992-07-10 |
DE69203042T2 (de) | 1995-12-21 |
FR2671427B1 (fr) | 1994-05-20 |
ES2074876T3 (es) | 1995-09-16 |
US5271329A (en) | 1993-12-21 |
JPH05505451A (ja) | 1993-08-12 |
DE69203042D1 (de) | 1995-07-27 |
EP0519064B1 (fr) | 1995-06-21 |
AU649112B2 (en) | 1994-05-12 |
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