US3033115A - Nose fuzes of the percussion type including a self-destruction device - Google Patents

Nose fuzes of the percussion type including a self-destruction device Download PDF

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Publication number
US3033115A
US3033115A US817800A US81780059A US3033115A US 3033115 A US3033115 A US 3033115A US 817800 A US817800 A US 817800A US 81780059 A US81780059 A US 81780059A US 3033115 A US3033115 A US 3033115A
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United States
Prior art keywords
nose
fuze
fuzes
self
abutment
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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
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US817800A
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English (en)
Inventor
Guerne William
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.)
Brevets Aero Mecaniques SA
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Brevets Aero Mecaniques SA
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    • 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
    • F42C1/06—Impact fuzes, i.e. fuzes actuated only by ammunition impact with firing-pin structurally combined with fuze operating by inertia of members on impact for any direction of impact
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C9/00—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition
    • F42C9/14—Double fuzes; Multiple fuzes
    • F42C9/16—Double fuzes; Multiple fuzes for self-destruction of ammunition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C9/00—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition
    • F42C9/14—Double fuzes; Multiple fuzes
    • F42C9/16—Double fuzes; Multiple fuzes for self-destruction of ammunition
    • F42C9/18—Double fuzes; Multiple fuzes for self-destruction of ammunition when the spin rate falls below a predetermined limit, e.g. a spring force being stronger than the locking action of a centrifugally-operated lock

Definitions

  • the present invention relates to percussion fuzes including a self-destruction device intended to be mounted at the front end of the nose of a rotating projectile.
  • firing pin or firing member will be taken in a very general meaning and will include any part, movably axially and capable, by its rearward displacement'produced by an impact, of causing the operation of the primer of the fuze, whether this primer is operable by a mechanical shock or by an electric contact.
  • the operation is more especially concerned with fuzes for small caliber explosive shells.
  • the object of the present invention is to provide a fuze of the above mentioned type which is better adapted to meet the requirements of practice, and in particular which has a more reliable operation in case of oblique impact upon a target.
  • a fuzes with which the invention is concerned include aself-destruction mechanical device, of the known type, including an axially slidable unit which is urged in the. rearward direction by suitable spring means to bring it into a rear position where it causes operation of the fuze but which is held in a front position against the action of said spring means by centrifugal weights cooperating with inclined surfaces as long as the speed of revolution of the projectile is at least equal to a predetermined value.
  • the thrust of the spring overcomes the effect of the centrifugal force on said weights and causes said unit to be moved into said rear position.
  • an abutment against which the centrifugal weights apply said sliding unit as long as the speed of revolution of the projectile remains higher than said predetermined value, this abutment being capable, under the effect of impact upon a target and of the deformation, even very small, of said nose caused by this impact, of throwing said sliding unit toward its rear position in such manner that the centrifugal weights are retracted and percussion can take place.
  • FIGS. 1 and 2 are axial sectional views of two percussion fuzes, respectively, made according to the invention.
  • the fuz'e includes a body, for instance of a light metal, in which is mounted a self-destruction device including a sliding unit 1 which is urged by a percussion spring 2 toward a rear position in which operation of the fuze takes place.
  • a self-destruction device including a sliding unit 1 which is urged by a percussion spring 2 toward a rear position in which operation of the fuze takes place.
  • Centrifugal weights 3, cooperating with an inclined surface 4 hold said unit 1 in the forward position as long as the speed of revolution of the projectile remains above a predetermined value.
  • the thrust of spring 2 overcomes the action of the centrifugal force and unit 1 is thrust rearwardly by spring 2 so as to cause the fuze to operate.
  • the firing pin 5 is directly carried by sliding unit 1, and is in fact integral therewith.
  • the front portion of unit 1 is provided with radial housings for balls 3 (which constitute the centrifugal weights) cooperating with an annular frusto-conical surface 4 fixed with respect to the fuze body, spring 2 urging the firing pin toward the rear position where it strikes primer 6.
  • balls 3 which constitute the centrifugal weights
  • annular frusto-conical surface 4 fixed with respect to the fuze body
  • spring 2 urging the firing pin toward the rear position where it strikes primer 6.
  • any suitable means may be provided.
  • the sliding unit 1 is prevented from moving rearwardly, before firing and until it has travelled a given distance along its trajectory, by a split ring 7, this ring being surrounded by a thin tin ribbon 8, spiral-wound about it and which is unwound only after the shot has been fired, so as then to permit ring 7 to open under the effect of the centrifugal force, after which the firing pin is retained only by the cooperation of balls 3 with inclined surface 4.
  • abutment 10 is disposed directly ahead of the sliding unit 1. Accordingly, before the shot is fired, said abutment 10 is located at a small distance (A approximately equal to 0.5 mm. for instance) from the front face of unit 1 (which carries balls 3). Once the shot is fired, the centrifugal force acting upon balls 3 causes unit 1 to move forwardly, against the action of spring 2, until it comes into contact with abutment 10 (A being then reduced to zero) without balls 3 having yet come into contact with a radial abutment.
  • A approximately equal to 0.5 mm. for instance
  • FIG. 2 there is interposed, between sliding unit 1 and abutment 10, a block 11, for instance of brass, slidable axially with respect of the fuze body on the inside of a recess 9, also closed at the front, provided in the nose of the fuze.
  • a block 11 for instance of brass, slidable axially with respect of the fuze body on the inside of a recess 9, also closed at the front, provided in the nose of the fuze.
  • the front end of spring 2 bears against said member 11.
  • member 11 is of cylindrical shape and is provided with a blind hole, turned toward the rear and in which the front end of spring 2 is engaged.
  • Member 11 is housed in a cylindrical recess provided in the nose of the fuze, in which it is freely slidable.
  • the rear face of member 11 (which member is in contact at the front with the abutment surface 10 provided, ahead of said member, in the recess 9 where it is freely slidable) is at a small distance (A being for instance approximately equal to 0.5 mm.) from the front face of unit 1.
  • Such a fuze has a high sensitivity, even in the case of impacts taking place at very small angles, on any kind of target.
  • the transmission to member 11 of the axial component of the forces due to the impact shock takes place practically instantaneously, even before the nose of the fuze body has had time to undergo a substantial deformation, so that the operation of the fuze remains correct, even if the nose of the fuze body is more or less crushed.
  • Spring 2 instead of having its front end applied against member 11, might pass through said member and be applied against the front wall of the recess 10 of the fuze body.
  • a nose fuze for a rotating projectile comprising a nose fuze casing closed at the front, means within said casing forming an abutment face at the inner front end of said casing, a firing member inside said casing disposed to slide longitudinally within said casing between forward and rear positions and having front and rear ends, said front end being formed for abutment against said abutment face when said firing member is in its forward position, primer means for firing the fuze disposed in a'fixed position behind said firing member for contact therewith when said firing member reaches its rear position, with a primer firing element carried at the rear end of said firing member, resilient means biased longitudinally in said casing resiliently urging said firing member to slide to its rear position and centrifugally actuated means comprising movable weights cooperating between fixed surfaces inside said casing and said firing member to urge said firing member to its forward position, the front end of said casing forming a continuous solid wall in front of said firing member and in front of said abutment face capable of preventing direct contact between
  • the nose fuze of claim 1 further comprising means engaging said firing member within said casing for retaining said firing member in an intermediate position between its forward and rear positions before said nose fuze is armed.
  • said means forming an abutment face comprises a block disposed forward of said firing member inside said casing and slidable axially in said casing between the inner front portion of said casing wall and said firing member, the rear face of said block being said abutment face, and in which said resilient means comprises a spring compressed axially between said firing member and said block.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
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US817800A 1958-06-12 1959-06-03 Nose fuzes of the percussion type including a self-destruction device Expired - Lifetime US3033115A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU352259X 1958-06-12

Publications (1)

Publication Number Publication Date
US3033115A true US3033115A (en) 1962-05-08

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US817800A Expired - Lifetime US3033115A (en) 1958-06-12 1959-06-03 Nose fuzes of the percussion type including a self-destruction device

Country Status (6)

Country Link
US (1) US3033115A (fr)
CH (1) CH352259A (fr)
DE (1) DE1123955B (fr)
FR (1) FR1227037A (fr)
GB (1) GB875313A (fr)
LU (1) LU36172A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3353489A (en) * 1965-02-26 1967-11-21 Rheinmetall Gmbh Impact fuze for a spinning projectile
US3516359A (en) * 1968-01-25 1970-06-23 Junghans Gmbh Geb Centrifugal spiral band locking device,especially for self-destroying fuzes
US3994230A (en) * 1974-09-02 1976-11-30 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Self-destruction type nose impact fuze for spinning projectiles
US3995557A (en) * 1974-11-20 1976-12-07 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Base fuze for a spinning projectile
US4109583A (en) * 1976-04-09 1978-08-29 The United States Of America As Represented By The Secretary Of The Army Projectile fuze
US4159679A (en) * 1976-07-09 1979-07-03 The United States Of America As Represented By The Secretary Of The Army Projectile fuze
US4406225A (en) * 1980-07-02 1983-09-27 Rheinmetall Gmbh Ignition fuse for spin-stabilized projectiles
US4535695A (en) * 1982-12-02 1985-08-20 Gebruder Junghans Gmbh Fuse for a spin-type projectile

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1149643B (de) * 1960-05-18 1963-05-30 Oerlikon Buehrle Ag Aufschlagzuender fuer Geschosse

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB131063A (en) * 1918-04-11 1919-08-21 Rudge Whitworth Ltd Improvements in Percussion Fuzes for Projectiles.
FI21046A (fi) * 1941-07-22 1946-01-26 Waffen Und Munitionsfa Deutsch Anslagständrör
US2405653A (en) * 1940-07-09 1946-08-13 Honger Guido Fuse for automatic destruction of shells
US2493278A (en) * 1945-01-17 1950-01-03 Brevets Aero Mecaniques Combined fuse
US2650541A (en) * 1948-05-28 1953-09-01 Rosselet Jean Fuze
US2790390A (en) * 1952-04-29 1957-04-30 Kenneth L Baker Delay arming, self-destroying and point detonating fuze device
US2806427A (en) * 1952-06-26 1957-09-17 Mach Tool Works Oerlikon Admin Projectile fuse
US2871788A (en) * 1955-05-24 1959-02-03 Brevets Aero Mecaniques Impact fuzes for explosive projectiles including a mechanical self-destruction device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR862783A (fr) * 1940-01-08 1941-03-14 Fusée autodestructrice
CH214200A (fr) * 1940-04-08 1941-04-15 Hausheer Henri Fusée pour projectile à giration.
CH221337A (de) * 1946-02-01 1942-05-31 Mefina Sa Aufschlagzünder mit mechanischer Selbstzerstörungseinrichtung.
LU31297A1 (fr) * 1952-02-27

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB131063A (en) * 1918-04-11 1919-08-21 Rudge Whitworth Ltd Improvements in Percussion Fuzes for Projectiles.
US2405653A (en) * 1940-07-09 1946-08-13 Honger Guido Fuse for automatic destruction of shells
FI21046A (fi) * 1941-07-22 1946-01-26 Waffen Und Munitionsfa Deutsch Anslagständrör
US2493278A (en) * 1945-01-17 1950-01-03 Brevets Aero Mecaniques Combined fuse
US2650541A (en) * 1948-05-28 1953-09-01 Rosselet Jean Fuze
US2790390A (en) * 1952-04-29 1957-04-30 Kenneth L Baker Delay arming, self-destroying and point detonating fuze device
US2806427A (en) * 1952-06-26 1957-09-17 Mach Tool Works Oerlikon Admin Projectile fuse
US2871788A (en) * 1955-05-24 1959-02-03 Brevets Aero Mecaniques Impact fuzes for explosive projectiles including a mechanical self-destruction device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3353489A (en) * 1965-02-26 1967-11-21 Rheinmetall Gmbh Impact fuze for a spinning projectile
US3516359A (en) * 1968-01-25 1970-06-23 Junghans Gmbh Geb Centrifugal spiral band locking device,especially for self-destroying fuzes
US3994230A (en) * 1974-09-02 1976-11-30 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Self-destruction type nose impact fuze for spinning projectiles
US3995557A (en) * 1974-11-20 1976-12-07 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Base fuze for a spinning projectile
US4109583A (en) * 1976-04-09 1978-08-29 The United States Of America As Represented By The Secretary Of The Army Projectile fuze
US4159679A (en) * 1976-07-09 1979-07-03 The United States Of America As Represented By The Secretary Of The Army Projectile fuze
US4406225A (en) * 1980-07-02 1983-09-27 Rheinmetall Gmbh Ignition fuse for spin-stabilized projectiles
US4535695A (en) * 1982-12-02 1985-08-20 Gebruder Junghans Gmbh Fuse for a spin-type projectile

Also Published As

Publication number Publication date
LU36172A1 (fr)
DE1123955B (de) 1962-02-15
CH352259A (fr) 1961-02-15
FR1227037A (fr) 1960-08-18
GB875313A (en) 1961-08-16

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