EP0316894B1 - Vorrohrsicherung an einem Geschoss mit Aufschlagzünder - Google Patents

Vorrohrsicherung an einem Geschoss mit Aufschlagzünder Download PDF

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Publication number
EP0316894B1
EP0316894B1 EP88119087A EP88119087A EP0316894B1 EP 0316894 B1 EP0316894 B1 EP 0316894B1 EP 88119087 A EP88119087 A EP 88119087A EP 88119087 A EP88119087 A EP 88119087A EP 0316894 B1 EP0316894 B1 EP 0316894B1
Authority
EP
European Patent Office
Prior art keywords
spring assembly
cage
safety
spiral spring
case
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
EP88119087A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0316894A1 (de
Inventor
Uwe Dipl.-Ing. Brede
Ernst Jensen
Helmuth Werner
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.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
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 Dynamit Nobel AG filed Critical Dynamit Nobel AG
Publication of EP0316894A1 publication Critical patent/EP0316894A1/de
Application granted granted Critical
Publication of EP0316894B1 publication Critical patent/EP0316894B1/de
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
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/20—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin
    • F42C15/23—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin by unwinding a flexible ribbon or tape

Definitions

  • the invention relates to a down pipe protection on a projectile with impact ignition according to the preamble of claim 1.
  • a pipe protection on a swirl-free projectile with impact ignition is known, in which the ignition needle is held at a distance from the ignition charge carrier (detonator) by means of a tape wrap in the form of a coil spring wound in one direction, which in turn by means of an overlapping one Cage is fixed in the tensioned state.
  • the cage When fired, the cage is moved axially forward under the action of the propellant gases so that the coil spring is released and can relax radially outwards, whereby it rests against the inner wall of an enlarged cavity of the cage.
  • This cavity adjoins the front area of the cage which fixes the tensioned spiral spring and which has a correspondingly smaller inner diameter.
  • the diameter of the cavity is such that the relaxed coil spring no longer locks the ignition needle, i.e. no longer keeps the two mutually movable parts of the ignition chain comprising the ignition needle and the charge carrier at a distance from one another.
  • the firing pin can therefore move forward against the detonator upon impact and cause its initiation.
  • the disadvantage here is that the release is done very quickly by the tape winding wound in only one direction and can only be varied within very narrow limits.
  • a front pipe protection for swirl projectiles with impact ignition is known from DE-A 2 457 947, in which a three-part tape winding package is provided, the inner tape winding resting on locking balls for locking a contact pin of the ignition chain and being made of such a material that it can accommodate the radial pressure the locking ball withstands without deformation.
  • the central band wrap determines the front pipe safety as the main wrap and the outer band wrap particularly determines the transport safety.
  • the main winding is preferably wound in the twist direction and the other two tape windings against the twist direction.
  • the tape winding package is opened here exclusively by the centrifugal force acting fully on the swirl projectile after leaving the pipe mouth, the safety of the down pipe being determined by the main winding and thus within very narrow limits.
  • the object of the invention is a precise, simple safety devices on the impact detonator of swirlless projectiles, which acts over an adjustable, even longer time range.
  • This downpipe protection is intended for impact detonators of swirlless projectiles.
  • the coiled coil spring package surrounded by the cage due to its presence in the space between the two parts of the ignition chain, prevents the ignition needle from approaching the ignition charge carrier.
  • the outermost layer of the outer coil spring immediately begins to relax.
  • the relaxation of the spiral spring runs consecutively from the outside in, never distributed over the entire length of the spring at the same time.
  • several spiral springs are wound one above the other, the winding direction changing with each spiral spring. This always calms and reverses the rotations of the remaining spring assembly when changing from one spiral spring to another; the sequence of the next counter-rotating spiral spring therefore starts again from zero.
  • considerable delay times can be generated reliably and reproducibly with just three coil springs wound in opposite directions. This unlocking takes place independently of a swirl movement of a projectile, which makes this fore-pipe protection suitable for swirlless projectiles.
  • the coil springs are to be dimensioned such that after relaxation, the inner diameter has become so large that the ignition charge carrier can be moved uninhibited in the direction of the ignition needle.
  • the parameters spring length, spring strength, degree of tension, due to the diameter of the cage and the pretreatment of the spring, as well as by rubbing the belt layers against each other, can be used to set the time in which ignition should not occur very easily.
  • a known transport safety device can also be implemented in the simplest manner by the cage being fixed in the axial direction by a lateral securing pin.
  • Figure I shows a projectile head 1 with the front pipe protection according to the invention.
  • the left half shows the secured position; in the right half, the down pipe protection is switched off and the axially movable ignition pin 2 is opened on the ignition needle disk 4 due to its inertia when it strikes the ignition needle 3.
  • the spiral spring assembly 6, which is surrounded by a cage 5 in the form of a circular ring, extends as far as into the space between the firing pin 3 and the front of the firing pin 2 out that even at the highest accelerations due to the rigidity of the spring assembly 6, touching the firing needle 3 on the firing pin 2 is excluded.
  • a locking pin 7 can still be seen, which serves as a transport lock. As long as this pin 7 is not pulled out, the cage 5 cannot move even under the greatest accelerations, and ignition is therefore impossible. The pin 7 is removed before loading.
  • the spring assembly 6 wound from three individual springs 8, 9, 10 can be seen better in FIG. 2.
  • the inner dash-dotted line 11 indicates the inner diameter of the cage 5 and corresponds approximately to the outer diameter of the firing pin 2.
  • the outer dash-dotted line 12 represents the outer diameter of the cage 5 or the inner wall of the projectile head and indicates the maximum available space into which the spring assembly 6 can expand. The space is so large that in the relaxed state of the spring assembly 6 the inner, approximately circular space 13 has become so large that the front part of the firing pin 2 is let through.
  • FIG. 2 shows the state in which the cage 5 has just slipped onto the ignition pin and the spring assembly 6 begins to relax.
  • the beginning 14 of the spring 8 lies against the wall 12 on the floor and the rest of the spring assembly 6 strives to unwind in a rotating manner along the wall 12 of the newly created larger free space.
  • the spring assembly 6 rotates with increasing rotational speed but still closed inner winding core up to the end of the spring band 8.
  • the end of the spring 10 lies very close to the ring-shaped spring assembly, which has an enlarged diameter, and the central opening 13 is so large that the spring 10 can no longer hinder the axial movement of the firing pin 2.
  • the time that passes until the narrow spring assembly 6 is expanded into a larger, again annular spring assembly depends on different sizes and is very easy to adjust.
  • the length, the tension and the friction of the belt layers against each other are important.
  • the relaxation and thus also the rotation of the spring assembly can advantageously be magnetically braked, which results in an increase in the backup time.
  • a safety device with a magnetic brake is shown in Figure 3.
  • the secured state is shown in the left half as in FIG. 1; the right half shows the state of the impact: the firing needle 3 penetrated the firing pin 2 which was moved forward when braking.
  • the parts are identified by the same reference numerals as in FIG. 1.
  • the ignition needle disk 4 is slightly bent upwards here. It receives an annular disc 15 of a permanent magnet. It is magnetized in such a way that the direction of magnetization essentially runs in the ring plane and the two poles on the disk form opposite each other and the field lines run predominantly perpendicular to the coil springs of the spring assembly 6.
  • FIG. 6 A somewhat modified spring assembly 6 is shown in FIG.
  • the beginning 16 of the outermost coil spring 8 is corrugated here. This prevents the outermost turn of the coil spring from being able to slide between the cage and the firing pin when the cage is removed from the coil spring assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Fuses (AREA)
  • Toys (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP88119087A 1987-11-20 1988-11-17 Vorrohrsicherung an einem Geschoss mit Aufschlagzünder Expired - Lifetime EP0316894B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873739368 DE3739368A1 (de) 1987-11-20 1987-11-20 Vorrohrsicherung an einem geschoss mit aufschlagzuender
DE3739368 1987-11-20

Publications (2)

Publication Number Publication Date
EP0316894A1 EP0316894A1 (de) 1989-05-24
EP0316894B1 true EP0316894B1 (de) 1990-08-22

Family

ID=6340897

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88119087A Expired - Lifetime EP0316894B1 (de) 1987-11-20 1988-11-17 Vorrohrsicherung an einem Geschoss mit Aufschlagzünder

Country Status (15)

Country Link
US (1) US4938139A (el)
EP (1) EP0316894B1 (el)
JP (1) JPH01167600A (el)
KR (1) KR890008545A (el)
AU (1) AU611725B2 (el)
CA (1) CA1320073C (el)
DE (2) DE3739368A1 (el)
ES (1) ES2017006B3 (el)
GR (1) GR3000973T3 (el)
IL (1) IL88417A (el)
IN (1) IN171682B (el)
MY (1) MY103479A (el)
PT (1) PT89038B (el)
SG (1) SG97091G (el)
TR (1) TR23888A (el)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4788062A (en) * 1987-02-26 1988-11-29 Alza Corporation Transdermal administration of progesterone, estradiol esters, and mixtures thereof
US5067405A (en) * 1990-04-12 1991-11-26 Dragolyoub Popovitch Safing and arming device
FR2714169B1 (fr) * 1993-12-17 1996-02-09 Manurhin Defense Dispositif de sécurité pour verrouiller un percuteur et procédé de fabrication de ce dispositif.
US7565795B1 (en) 2006-01-17 2009-07-28 Pratt & Whitney Rocketdyne, Inc. Piezo-resonance igniter and ignition method for propellant liquid rocket engine
US20080299504A1 (en) * 2007-06-01 2008-12-04 Mark David Horn Resonance driven glow plug torch igniter and ignition method
US8814562B2 (en) * 2008-06-02 2014-08-26 Aerojet Rocketdyne Of De, Inc. Igniter/thruster with catalytic decomposition chamber
US8161725B2 (en) 2008-09-22 2012-04-24 Pratt & Whitney Rocketdyne, Inc. Compact cyclone combustion torch igniter
KR101670253B1 (ko) 2010-02-16 2016-10-31 삼성전자 주식회사 이동 무선통신 시스템에서 단말의 네트워크 억세스 제어 방법 및 장치.
GB2493574A (en) 2011-11-10 2013-02-13 Renesas Mobile Corp Transmission of closed subscriber group identifiers (CSG IDs) based on load condition of a cell
CN111650402B (zh) * 2020-05-14 2022-04-12 南京理工大学 一种基于三轴加速度计的弹道顶点识别方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1198830A (fr) * 1960-05-11 1959-12-09 Soc Tech De Rech Ind Perfectionnement aux fusées pour projectiles

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE564754A (el) * 1957-02-20
DE1225518B (de) * 1963-11-12 1966-09-22 Junghans Ges Mit Beschraenkter Drallgeschosszerlegerzuender
DE2457947A1 (de) * 1974-12-07 1976-06-10 Rheinmetall Gmbh Detonatorsicherung fuer drallgeschosse
DE2735575A1 (de) * 1977-08-06 1979-02-15 Rheinmetall Gmbh Aufschlagzuender fuer drallgeschosse
DE3049082C2 (de) * 1980-12-24 1984-08-23 Diehl GmbH & Co, 8500 Nürnberg Sicherungseinrichtung für einen Zünder
DE3151470C2 (de) * 1981-12-24 1987-05-07 Gebrüder Junghans GmbH, 7230 Schramberg Bandwickel zur drallabhängigen Zündersicherung von Geschoßzündern
FR2533686B1 (fr) * 1982-09-24 1987-01-02 Manurhin Dispositif de securite a cage tournante pour projectile giratoire
US4662279A (en) * 1985-09-23 1987-05-05 Interdyne Service Corp. Safing and arming device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1198830A (fr) * 1960-05-11 1959-12-09 Soc Tech De Rech Ind Perfectionnement aux fusées pour projectiles

Also Published As

Publication number Publication date
PT89038B (pt) 1993-11-30
AU2419288A (en) 1989-05-25
IL88417A0 (en) 1989-06-30
KR890008545A (ko) 1989-07-12
DE3860491D1 (de) 1990-09-27
IL88417A (en) 1993-01-14
PT89038A (pt) 1989-09-14
GR3000973T3 (en) 1991-12-10
MY103479A (en) 1993-06-30
CA1320073C (en) 1993-07-13
SG97091G (en) 1992-02-14
IN171682B (el) 1992-12-05
EP0316894A1 (de) 1989-05-24
JPH01167600A (ja) 1989-07-03
DE3739368C2 (el) 1991-06-06
DE3739368A1 (de) 1989-06-01
US4938139A (en) 1990-07-03
ES2017006B3 (es) 1990-12-16
TR23888A (tr) 1990-10-17
AU611725B2 (en) 1991-06-20

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