[go: up one dir, main page]

US3151558A - Percussion fuze with inertia type arming means - Google Patents

Percussion fuze with inertia type arming means Download PDF

Info

Publication number
US3151558A
US3151558A US128501A US12850161A US3151558A US 3151558 A US3151558 A US 3151558A US 128501 A US128501 A US 128501A US 12850161 A US12850161 A US 12850161A US 3151558 A US3151558 A US 3151558A
Authority
US
United States
Prior art keywords
fuze
striker
tube
rocket
launching tube
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
US128501A
Other languages
English (en)
Inventor
Lunati Charles Joseph
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3151558A publication Critical patent/US3151558A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F42C1/14—Impact fuzes, i.e. fuzes actuated only by ammunition impact operating at a predetermined distance from ground or target by means of a protruding member
    • 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
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/18—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved
    • F42C15/184—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a slidable carrier
    • 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
    • F42C15/22—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 using centrifugal force
    • 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
    • F42C15/24—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by inertia means

Definitions

  • the present invention relates to a percussion fuze adapted to prime the explosive head of a rocket, rotating or not about its axis, fired from a tube either for airground or ground-ground purposes.
  • the object of the present invention is to provide a fuze fulfilling as far as possible the aforesaid conditions.
  • the instantaneous mechanical percussion fuze according to the invention is elongated, having a cylindrical base of diameter equal to the caliber of the explosive head of the rocket and has a mechanism which is armed by the force of set-back resulting from propulsion. It is particularly characterised by a mechanism which comprises the combination of an elongated striker lying along the longitudinal axis of said fuze, locking means adapted to immobilise said striker in its safe position, a primer borne by a transversal slide situated in the cylindrical base of said fuze, the primer being held out of alignment with the longitudinal axis of said striker in said safe position, said slide abutting and compressing a spring at one side thereof and bearing an offset pin on the opposite side thereof adapted to abut the inner wall of a launching tube when said fuze of said rocket is within said launching tube, means for immobilising said slide by said striker when said striker is in its aforesaid safe position, unlocking means adapted to free said locking means only when said
  • the mechanism is mounted in an assembly comprising a metallic base portion and a tubular metallic core portion, said assembly being surrounded by plastic material Crilsan or nylon moulded thereon to yconform to the nal desired elongated shape of said fuze to thereby constitute a plastic fairing, said striker projecting beyond the fore extremity of said core portion when said fuze is primed.
  • FIGURE l is a section along the longitudinal axis of a fuze according to the preferred embodiment of the invention mounted on the explosive head of a rocket.
  • FIGURE 2 is a detail in elevation of the safety lock litted to the fuze of FIGURE l viewed in the direction of arrows II-II on FIGURE 1.
  • the fuze is made of a suitable plastic material moulded over a metallic assembly which contains a tubular core portion and a base portion which houses the fuze mechamsm.
  • the fuze is of a very elongated shape and constitutes the entire conical head of the projectile; its base has a diameter equal to the caliber of the explosive head of the rocket (or the internal diameter of the tube); accordingly the explosive head (shown in the drawing) is cylindrical and therefore economic.
  • the head 1a of the striker 1 when the fuze is armed, projects from the metallic forepart of the fuze into a nose-piece 2 of transparent plastic material. The amount of such projection is limited by a keeper 1b.
  • the primer 3 is located in a cylindrical slide 4, transversely situated in the cylindrical base of the fuze; when it is in the safe position, the primer 3 is not in alignment either with the channel leading to the explosive charge or with the striker 1. Accordingly the latter cannot reach the primer when in this safe position.
  • the pin 4a which is offset for orientation purposes, i.e. to prevent rotation of the slide, forms an extension of the slide 4, said pin extending through the fuze wall bears against the inner wall of the launching tube.
  • a spring 4b biases the slide 4 to its operative position.
  • the slide 4 When the fuze is in storage the slide 4, immobilised by the tip of the striker 1 extending thereinto by way of a recessed hole, can also be locked from the outside by means of a safety lock 5 remaining in place on the fuze during the fire and movable between two positions: S (safety) and F (lire). In position S, the lock grips and immobilises the pin 4a.
  • the striker 1 Prior to firing, the striker 1 is immobilised in the central metallic core portion of the fuze by means of balls 6. These balls are retained in position by a sleeve member 7 capable of retracting against the opposition of a standardised spring 7 a When under the effect of launching acceleration.
  • the standardisation of spring 7a and the course of the sleeve member 7 are calculated to ensure that the balls do not become freed in the event of the rocket falling on its aft end.
  • This sleeve member 7 is not adjusted in its center on the striker 1; the striker 1 passes into a large hole without any adjustment.
  • the sleeve member 7 In order to free the balls, the sleeve member 7 has to retract until it seats on the bottom 7b of the bore in which it is movable. It is prevented from completing its full travel by a bolt S-Sb held, despite a return spring 8a, with its head 8 projecting into the bore, the shank 8b of said bolt bearing against the inner wall of the launching tube. Thus, full retraction of the sleeve member 7 is prevented either as long as the fuze is within the launching tube or as long as the safety lock is in the position S.
  • the function of .the fuze is as follows: on positioning the rocket in i-ts launching tube 10, the safety lock 5 is changed manually from S to F. Both the pin 4a and the shank 8b are then liberated; on firing, the rocket starts to accelerate and the mobile members tend to move to the rear on the effect of set-back force.
  • the striker 1 abuts against the keeper 1b, the sleeve member 7 retracts in compressing the compression spring 7a, but is stopped on contacting the bolt head 8, the shank 8b of which is in frictional engagement with the launching tube. Due to the fact that the rearward travel of sleeve member 7 has been stopped, the balls 6 are not released and the striker 1 remains locked.
  • the sleeve member 7 With the propulsion (hence acceleration) of the rocket continuing outside the tube, the sleeve member 7 is able to retract completely, until it seats on the bottom 7b of its bore, entirely freeing itself from the head la of the striker and Ithus releasing the balls 6, as long as the bolt 8 is no longer restrained by the launching tube. Machining of the bolt head 8 to taper in part advantageously promotes the displacement of said bolt under the effect of the sleeve member 7 bearing thereon.
  • the fuze disclosed facilitates unloading of unfired rockets; since such unloading requires the rocket to be extracted from the rear backwards, it will be appreciated that the safety lock becomes visible to the operator before the pin 4a and the shank Sb which are still engaged within the launching tube. It is therefore an easy matter to push the safety lock 5 from F to S before replacing the rocket under its safe storage conditions.
  • This feature is of particular importance when unloading a damaged rocket-launcher, such as may be required in the case of a crash-landed aircraft where earth has been violently thrown into the launching tubes. This projected earth hitting the nose of the fuze cannot cause this fuse to be actuated in view of the offset position of the primer relative to the striker.
  • An armed fuze is readily recognizable since its striker head 1a is visible through the nose-piece 2 and at the same time the pin 4a is seen to project laterally from the body of the fuze.
  • Instantaneous mechanical percussion fuze for a rocket launched by means of a launching tube, said fuze comprising a combination of (a) a percussion mechanism functioning under the action of acceleration forces caused by the propulsion 4 of the rocket, having an elongated striker situated in a longitudinal axis of said fuze,
  • a first locking device immobilizing the striker including (c) a tubular member surrounding said striker movable toward its unlocking position upon initial launching movement of the fuze in the launching tube,
  • a second locking device comprising a shank of which one extremity engages the inner wall of the launching tube when the fuze is in the tube and the other extremity is held disposed in the path of movement of the tubular member by the engagement of said one extremity with the inner wall of the launching tube to prevent the said member of the first locking device from moving to its fully unlocking position for freeing the striker,
  • (j) means acting on said shank, when 'the fuze is launched from the tube, to withdraw the shank from the path of movement of the said member of the first locking device to permit said first locking device member to move to its unlocking position to free the striker for the detonating stroke.
  • a percussion fuze as claimed in claim 1 further comprising (j) a conical-shaped frame comprising (k) a metallic base, and
  • the striker is an elongated rod situated in the axis of the hollow tube having a head at one end provided with a recess and having a skirt and having a tip at the other end,
  • said first movable locking member comprising (u) a sleeve member for sliding in said striker skirt within the elongated hollow central tube and having a fore aperture through which said striker rod extends and the diameter of which is larger than that of the striker rod, the said skirt having (v) a plurality of apertures at the same level,
  • the length of the sleeve member being less than the distance between the lower edge of the skirt and the bottom of the central tube, the wall of the central tube having (x) a plurality of apertures in correspondence with said apertures in said skirt when the head of the striker is in contact with the front of the sleeve member,
  • Instantaneous mechanical percussion fuze for a rocket wherein said base of the fuze has (s) an opening therethrough, said second locking device for the striker comprises (t) a bolt including a head and said shank extending through said opening in said base to engage the inner wall of the launching tube so that the head of the bolt projects into the central tube into the path of inward movement of said sleeve member to prevent said rst sleeve member from reaching its fully unlocking position while the fuze is in the launching tube, the distance between the ball housings and the bolt head being less than the length of the sleeve member, and
  • said base has a recess provided in its outer surface to receive the free ends of said guide member and the shank of said bolt, said fuze further comprises (s) a safety lock on the outer surface of the fuze for said guide member and bolt including (sl) a plate housed to slide in said recess and containing two similarly shaped and oriented openings each of which comprises two profiles in plan,

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Golf Clubs (AREA)
  • Air Bags (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
US128501A 1960-08-08 1961-08-01 Percussion fuze with inertia type arming means Expired - Lifetime US3151558A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR835319A FR1274980A (fr) 1960-08-08 1960-08-08 Fusée percutante pour roquette

Publications (1)

Publication Number Publication Date
US3151558A true US3151558A (en) 1964-10-06

Family

ID=8737101

Family Applications (1)

Application Number Title Priority Date Filing Date
US128501A Expired - Lifetime US3151558A (en) 1960-08-08 1961-08-01 Percussion fuze with inertia type arming means

Country Status (4)

Country Link
US (1) US3151558A (de)
DE (1) DE1158876B (de)
FR (1) FR1274980A (de)
GB (1) GB946489A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839963A (en) * 1972-04-10 1974-10-08 Constr Navales Ind Proximity fuse for missiles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2539225B1 (fr) * 1983-01-11 1987-07-17 Mecanique Precision Aeronautiq Tete de fusee perfectionnee a percussion, notamment pour roquette, a armement temporise

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2705921A (en) * 1949-12-15 1955-04-12 Jr John W Moseman Fuze for non-rotating shaped charge projectiles
US2870713A (en) * 1955-06-09 1959-01-27 Saloranta Arvo Ensio Fuse for shells
CH336727A (fr) * 1956-04-05 1959-02-28 Brandt Soc Nouv Ets Fusée percutante pour projectile

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR528187A (fr) * 1920-07-06 1921-11-08 Antoine Bosselut Percuteur pour fusée d'obus
DE479567C (de) * 1925-05-18 1929-07-18 Gruber Hans Landmine in Scheibenform mit radial verlaufendem Zuendgehaeuse
US2537855A (en) * 1944-06-09 1951-01-09 Henry H Porter Point contact fuse
US2429599A (en) * 1944-09-05 1947-10-28 Leo E Beavers Projectile
BE556752A (de) * 1956-09-05
DE1080438B (de) * 1957-10-09 1960-04-21 Foersvarets Fabriksstyrelse Durch Traegheitswirkung entsicherbarer Aufschlagzuender

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2705921A (en) * 1949-12-15 1955-04-12 Jr John W Moseman Fuze for non-rotating shaped charge projectiles
US2870713A (en) * 1955-06-09 1959-01-27 Saloranta Arvo Ensio Fuse for shells
CH336727A (fr) * 1956-04-05 1959-02-28 Brandt Soc Nouv Ets Fusée percutante pour projectile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839963A (en) * 1972-04-10 1974-10-08 Constr Navales Ind Proximity fuse for missiles

Also Published As

Publication number Publication date
FR1274980A (fr) 1961-11-03
DE1158876B (de) 1963-12-05
GB946489A (en) 1964-01-15

Similar Documents

Publication Publication Date Title
US4811664A (en) Fuse for sub-munition warhead
US4860969A (en) Airborne body
US2701527A (en) Selective delayed-action fuze
US2999461A (en) Impact fuze
US2030085A (en) Point-detonating fuse for projectiles
US4004488A (en) Dual-motion firing device
US4333400A (en) Two stage parachute fuze recovery system
US3724385A (en) Fuze having a pneumatic and inertia arming system
US2712284A (en) Delayed arming safety fuse
US2076602A (en) Fuse for projectiles
US3439615A (en) Rifle grenade fuze and bulletstopping device
US3491693A (en) Rifle grenade capable of being fired by conventional ammunition
US3118378A (en) Percussion fuze for rocket
US3204530A (en) Rocket boosted automatic weapon and ammunition system
US3151558A (en) Percussion fuze with inertia type arming means
US2951444A (en) Fuze arming and safety mechanism
US2817295A (en) Firing pin for rocket fuze
US1549763A (en) Fuse for projectiles
KR101879944B1 (ko) 지연장전부와 격침부 사이의 기폭정렬이 보장되는 충격신관
US1375466A (en) Impact-fuse
US2925778A (en) Helix type delay detent
US3630152A (en) Safety fuse with time and impact action
US2772635A (en) Rifle grenade
US3901156A (en) Safety and arming device for fuses
US2420662A (en) Fuze