US20080173202A1 - Tail fuze - Google Patents

Tail fuze Download PDF

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Publication number
US20080173202A1
US20080173202A1 US11/866,580 US86658007A US2008173202A1 US 20080173202 A1 US20080173202 A1 US 20080173202A1 US 86658007 A US86658007 A US 86658007A US 2008173202 A1 US2008173202 A1 US 2008173202A1
Authority
US
United States
Prior art keywords
fuze
tail
needle
spring
piercing
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.)
Abandoned
Application number
US11/866,580
Inventor
Frank Kienzler
Wolfgang Zehnder
Gerd Giesler
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.)
Junghans Microtec GmbH
Original Assignee
Junghans Microtec GmbH
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 Junghans Microtec GmbH filed Critical Junghans Microtec GmbH
Assigned to JUNGHANS MICROTEC GMBH reassignment JUNGHANS MICROTEC GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZEHNDER, WOLFGANG, GIESLER, GERD, KIENZLER, FRANK
Publication of US20080173202A1 publication Critical patent/US20080173202A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C1/00—Impact fuzes, i.e. fuzes actuated only by ammunition impact
    • F42C1/02—Impact fuzes, i.e. fuzes actuated only by ammunition impact with firing-pin structurally combined with fuze
    • F42C1/04—Impact fuzes, i.e. fuzes actuated only by ammunition impact with firing-pin structurally combined with fuze operating by inertia of members on impact
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes
    • 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
    • F42C15/005—Combination-type safety mechanisms, i.e. two or more safeties are moved in a predetermined sequence to each other

Definitions

  • the invention relates to a tail fuze which incorporates an electrical detonator and alternative structure enabling mechanical firing thereof.
  • a tail fuze such as this can be used, for example, for a 120 mm HEMP HE-L mortar round, and if required as a 120 mm armour fuze or the like. It has an electrical detonator, a fuze needle associated with the electrical detonator, and a piercing fuze means, which can be moved into line with the fuze needle.
  • the invention is therefore based on the object of providing a tail fuze of the type mentioned initially, in which a failure of the electrical firing does not result in any problem, because mechanical firing then takes place reliably on striking the ground.
  • the fuze needle has a mass body on which a restraint spring is provided.
  • the piercing fuze means is fired by the fuze needle with the associated mass body on striking the ground.
  • the mass body once the safe-separation has elapsed—is held in the safe position by the restraint spring until the impact occurs with the ground.
  • the tail fuze according to the invention therefore has the significant advantage that misfires are avoided.
  • the FIGURE shows one embodiment of the tail fuze 10 , which has an electrical detonator 12 with an associated fuze needle 14 .
  • the tail fuze 10 has a piercing fuze means 16 , which is provided on a rotor 18 .
  • the rotor 18 has a safe-separation distance device 20 , which is formed by a first spring bolt 22 , a second spring bolt 24 and a blocking element 26 provided between the first and the second spring bolt 22 , 24 .
  • the blocking element 26 is, for example, formed by a ball.
  • the reference number 28 denotes a fuze booster.
  • the launch and flight direction is indicated by the arrow 30 .
  • ammunition with an associated tail fuze 10 is fired in the direction of the arrow 30 , then its inertia first of all results in the first spring bolt 22 being moved in the opposite direction to the direction of flight 30 , following which the blocking element 26 can move radially outwards.
  • the second spring bolt 24 can also move in the opposite direction to the direction of flight 30 , against the associated spring, by virtue of its inertia, thus allowing the rotor 18 to rotate in order to move the piercing fuze means 16 in line with the fuze needle 14 .
  • the fuze needle 14 is combined with a mass body 32 on which a restraint spring 34 is provided.
  • the restraint spring 34 is provided on the side of the mass body 32 facing the electrical detonator 12 , and, for example, is formed by an annular spring.
  • the piercing fuze means 16 which is located in line with the fuze needle 14 , is fired on striking the ground by the inertia of the mass body 32 , which moves the fuze needle 14 into the piercing fuze means 16 , and activates the piercing fuze means 16 .
  • the piercing fuze means 16 then fires the fuze booster 28 .
  • the mass body 32 is held in the safe position by the restraint spring 34 during flight—once the safe-separation distance has elapsed—until impact occurs with the ground.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Lock And Its Accessories (AREA)

Abstract

A tail fuze (10) is described having an electrical detonator (12), a fuze needle (14) which is associated with the electrical detonator, a piercing fuze (16) which can be moved into line with the fuze needle (14) and is intended for a fuze booster (28), wherein the fuze needle (14) has a mass body (32) on which a restraint spring (34) is provided. If the electrical firing fails, then the piercing fuze (16) is fired on striking the ground by the fuze needle (14) as a result of the inertia of the mass body (32).

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The invention relates to a tail fuze which incorporates an electrical detonator and alternative structure enabling mechanical firing thereof.
  • 2. Discussion of the Prior Art
  • A tail fuze such as this can be used, for example, for a 120 mm HEMP HE-L mortar round, and if required as a 120 mm armour fuze or the like. It has an electrical detonator, a fuze needle associated with the electrical detonator, and a piercing fuze means, which can be moved into line with the fuze needle.
  • In the case of fuzes such as these, it is not possible to reliably preclude failure of the electrical firing, that is to say activation of the electrical detonator.
    • SUMMARY OF THE INVENTION
  • The invention is therefore based on the object of providing a tail fuze of the type mentioned initially, in which a failure of the electrical firing does not result in any problem, because mechanical firing then takes place reliably on striking the ground.
  • In the case of a tail fuze of the type mentioned initially, this object is achieved according to the invention by the features in the characterizing part of Claim 1. Preferred embodiments and developments of the tail fuze according to the invention are characterized in the dependent claims.
  • In the case of the tail fuze according to the invention, the fuze needle has a mass body on which a restraint spring is provided.
  • If the electrical firing of the tail fuze according to the invention fails, then the piercing fuze means is fired by the fuze needle with the associated mass body on striking the ground. During flight, the mass body—once the safe-separation has elapsed—is held in the safe position by the restraint spring until the impact occurs with the ground. The tail fuze according to the invention therefore has the significant advantage that misfires are avoided.
    • BRIEF DESCRIPTION OF THE DRAWING
  • Further details, features and advantages will become evident from the following description of one exemplary embodiment, which is illustrated partially and in a longitudinal section form in the single FIGURE of drawing, of the tail fuze according to the invention.
    •  DETAILED DESCRIPTION OF THE INVENTION
  • The FIGURE shows one embodiment of the tail fuze 10, which has an electrical detonator 12 with an associated fuze needle 14. The tail fuze 10 has a piercing fuze means 16, which is provided on a rotor 18. The rotor 18 has a safe-separation distance device 20, which is formed by a first spring bolt 22, a second spring bolt 24 and a blocking element 26 provided between the first and the second spring bolt 22, 24. The blocking element 26 is, for example, formed by a ball.
  • The reference number 28 denotes a fuze booster.
  • The launch and flight direction is indicated by the arrow 30. When ammunition with an associated tail fuze 10 is fired in the direction of the arrow 30, then its inertia first of all results in the first spring bolt 22 being moved in the opposite direction to the direction of flight 30, following which the blocking element 26 can move radially outwards. As soon as the blocking element 26 has moved radially outwards, the second spring bolt 24 can also move in the opposite direction to the direction of flight 30, against the associated spring, by virtue of its inertia, thus allowing the rotor 18 to rotate in order to move the piercing fuze means 16 in line with the fuze needle 14.
  • The fuze needle 14 is combined with a mass body 32 on which a restraint spring 34 is provided. The restraint spring 34 is provided on the side of the mass body 32 facing the electrical detonator 12, and, for example, is formed by an annular spring.
  • If the electrical detonator 12 fails, once the safe-separation distance has elapsed, then the piercing fuze means 16, which is located in line with the fuze needle 14, is fired on striking the ground by the inertia of the mass body 32, which moves the fuze needle 14 into the piercing fuze means 16, and activates the piercing fuze means 16. The piercing fuze means 16 then fires the fuze booster 28.
  • The mass body 32 is held in the safe position by the restraint spring 34 during flight—once the safe-separation distance has elapsed—until impact occurs with the ground.
    • LIST OF REFERENCE SYMBOLS
  • 10 Tail fuze
    12 electrical detonator (of 10)
    14 fuze needle (of 10)
    16 piercing fuze means (of 10)
    18 rotor (for 16)
    20 safe-separation distance device (for 16, 18)
    22 spring bolt (of 20)
    24 second spring bolt (of 20)
    26 blocking element (between 22 and 24)
    28 fuze booster (of 10)
    30 arrow/launch, flight direction (of 10)
    32 mass body (for 14)
    34 restraint spring (for 32)

Claims (6)

1. A tail fuze having an electrical detonator (12), a fuze needle (14) which is operatively associated with the electrical detonator, a piercing fuze means (16), which is movable into line with the fuze needle (14) and is provided for a fuze booster (28), and wherein the fuze needle (14) has a mass body (32) having a restraint spring (34) arranged thereon.
2. A tail fuze according to claim 1, wherein the restraint spring (34) is provided on a side of the mass body (32) facing the electrical detonator (12).
3. A tail fuze according to claim 1, wherein the restraint spring (34) is formed by an annular spring.
4. A tail fuze according to claim 2, wherein the restraint spring (34) is formed by an annular spring.
5. A tail fuze according to claim 1, wherein the piercing fuze means (16) is located on a rotor (18), which has a safe-separation distance device (20).
6. A tail fuze according to claim 5, wherein the safe-separation distance device (20) has spring bolts (22, 24), and a blocking element (26) positioned between the spring bolts.
US11/866,580 2006-10-27 2007-10-03 Tail fuze Abandoned US20080173202A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006050739.8 2006-10-27
DE102006050739A DE102006050739B3 (en) 2006-10-27 2006-10-27 Soil detonator with an electric detonator and a firing pin

Publications (1)

Publication Number Publication Date
US20080173202A1 true US20080173202A1 (en) 2008-07-24

Family

ID=38983535

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/866,580 Abandoned US20080173202A1 (en) 2006-10-27 2007-10-03 Tail fuze

Country Status (4)

Country Link
US (1) US20080173202A1 (en)
EP (1) EP1916497A1 (en)
DE (1) DE102006050739B3 (en)
ZA (1) ZA200709191B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110203474A1 (en) * 2008-10-30 2011-08-25 Junghans Microtec Gmbh Fuze for a projectile

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2750888A (en) * 1946-11-13 1956-06-19 Robert O Wynn Long delay bomb tail fuze
US2805623A (en) * 1951-09-07 1957-09-10 Raymond H Blair Tail fuze for an ordnance missile
US2838998A (en) * 1941-07-07 1958-06-17 Harry H Deringer Hydrostatic tail fuse
US3613595A (en) * 1957-03-18 1971-10-19 Us Army Tail fuze
US3788230A (en) * 1969-01-29 1974-01-29 A Losfeld Universal projectile
US4091734A (en) * 1977-02-22 1978-05-30 The United States Of America As Represented By The Secretary Of The Navy Aircraft to weapon fuze communication link
US4217828A (en) * 1977-09-09 1980-08-19 S.A. Prb, Societe Anonyme Safety device for fuses
US4286521A (en) * 1978-07-27 1981-09-01 Redon Trust Device actuated electrically to trigger a mechanical percussion detonator
US4296686A (en) * 1978-07-27 1981-10-27 Redon Trust Remote control device for activating or inactivating a pneumatic war mine
US4896607A (en) * 1987-10-01 1990-01-30 Hall James C Boosted kinetic energy penetrator fuze
US4969397A (en) * 1988-10-21 1990-11-13 Rheinmetall Gmbh Grenade-type projectile
US5189250A (en) * 1988-10-05 1993-02-23 Frag, Ltd. Projectile for smooth bore weapon
US5821447A (en) * 1995-08-24 1998-10-13 The United States Of America As Represented By The Secretary Of The Navy Safety and arming device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7339064U (en) * 1974-06-27 Diehl Fuzes for twist projectiles
FR1088607A (en) * 1953-08-24 1955-03-09 Soc Tech De Rech Ind Rocket training for projectiles
DE19901045B4 (en) * 1999-01-14 2007-06-06 Junghans Feinwerktechnik Gmbh & Co. Kg An attachment device for an electronic proximity fuse with a strike body carrying a firing piece
DE20023637U1 (en) * 2000-09-05 2005-05-19 Junghans Feinwerktechnik Gmbh & Co. Kg Primer for projectile with igniter pin with following piercing detonator and ignition booster

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2838998A (en) * 1941-07-07 1958-06-17 Harry H Deringer Hydrostatic tail fuse
US2750888A (en) * 1946-11-13 1956-06-19 Robert O Wynn Long delay bomb tail fuze
US2805623A (en) * 1951-09-07 1957-09-10 Raymond H Blair Tail fuze for an ordnance missile
US3613595A (en) * 1957-03-18 1971-10-19 Us Army Tail fuze
US3788230A (en) * 1969-01-29 1974-01-29 A Losfeld Universal projectile
US4091734A (en) * 1977-02-22 1978-05-30 The United States Of America As Represented By The Secretary Of The Navy Aircraft to weapon fuze communication link
US4217828A (en) * 1977-09-09 1980-08-19 S.A. Prb, Societe Anonyme Safety device for fuses
US4286521A (en) * 1978-07-27 1981-09-01 Redon Trust Device actuated electrically to trigger a mechanical percussion detonator
US4296686A (en) * 1978-07-27 1981-10-27 Redon Trust Remote control device for activating or inactivating a pneumatic war mine
US4896607A (en) * 1987-10-01 1990-01-30 Hall James C Boosted kinetic energy penetrator fuze
US5189250A (en) * 1988-10-05 1993-02-23 Frag, Ltd. Projectile for smooth bore weapon
US4969397A (en) * 1988-10-21 1990-11-13 Rheinmetall Gmbh Grenade-type projectile
US5821447A (en) * 1995-08-24 1998-10-13 The United States Of America As Represented By The Secretary Of The Navy Safety and arming device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110203474A1 (en) * 2008-10-30 2011-08-25 Junghans Microtec Gmbh Fuze for a projectile
US8342093B2 (en) 2008-10-30 2013-01-01 Junghans Microtec Gmbh Fuze for a projectile

Also Published As

Publication number Publication date
EP1916497A1 (en) 2008-04-30
DE102006050739B3 (en) 2008-07-24
ZA200709191B (en) 2008-09-25

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Legal Events

Date Code Title Description
AS Assignment

Owner name: JUNGHANS MICROTEC GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIENZLER, FRANK;ZEHNDER, WOLFGANG;GIESLER, GERD;REEL/FRAME:019914/0717;SIGNING DATES FROM 20070822 TO 20070920

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION