US3039392A - Projectile fuze for a gun with a rifled bore - Google Patents

Projectile fuze for a gun with a rifled bore Download PDF

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Publication number
US3039392A
US3039392A US828137A US82813759A US3039392A US 3039392 A US3039392 A US 3039392A US 828137 A US828137 A US 828137A US 82813759 A US82813759 A US 82813759A US 3039392 A US3039392 A US 3039392A
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United States
Prior art keywords
fuze
projectile
gun
primer
slide
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
US828137A
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English (en)
Inventor
Simmen Robert
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.)
Mefina SA
Original Assignee
Mefina SA
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Filing date
Publication date
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Publication of US3039392A publication Critical patent/US3039392A/en
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Classifications

    • 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
    • F42C15/188—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 rotatable 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
    • F42C15/26—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 using centrifugal force
    • 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
    • F42C9/141—Impact fuze in combination with a clockwork time fuze
    • 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 has for its subject a projectile fuze for use in a gun with a rifled bore.
  • the fuze is of the type comprising safety devices for transport and combined trajectory and primer safety means, wherein the primer is carried by a movable support maintaining it spaced from its armed position during a predetermined period of time.
  • Fuzes of this general type also include an automatic destruction device released by a spring and controlled by a timing device; a percussion device with mechanical retardation means comprising a pusher the axial position of which controls, by means of a bolt, the locking and release respectively, of a spring loaded striker.
  • the pusher member referred to is adapted to be displaced by an impact rod or by an automatic destruction device.
  • Projectile fuzes of the type indicated above are known, wherein the automatic destruction device comes into operation by reason of the diminution of the rotation of the projectile towards the end ofits trajectory. These fuzes have the disadvantage of having a large variation in the time period of auto-destruction.
  • the primary object of the present invention is to overcome this disadvantage by providing a projectile fuze wherein a single clockwise mechanism controls both the automatic destruction device as well as the combined'trajectory and primer safety device, so that an exact timing of the period of automatic destruction may be obtained and thus assure that the fuze will not be set in armed position until after it is a safe distance from the gun from which it is fired.
  • FIG. 1 is a general axial section of the fuze.
  • FIG. 2 is a cross-section on the line II'II of FIG 1.
  • FIG. 3 is a cross-section onthe line IIIIlI of FIG 1.
  • FIG. 4 is a section on the line IVIV of FIG. 1.
  • FIG. 5 is a view similar to FIG. 1, showing the fuze in the percussion position by impact.
  • FIG. 6 is a view similar to the preceding one, showing the fuze in the percussion position by auto-destruction.
  • This fuze comprises a body 1 adapted to be mounted in an ogival head 2 of the projectile.
  • Said body 1 is normally constituted by a series of plates piled on one another and formed in such a manner as to contain the difierent movable members which the fuzecomprises.
  • the body 1 of the fuze shown is assumed to be in two principal parts.
  • the point of the body 1 is hollow, in such a manner as to receive a percussion rod 3 protected in the normal position of the fuze, by a plate 4.
  • the firing of the projectile is eifected through the medium of a striker 5 of which the point 6 is adapted to perforate a primer 7 carried by a movable support 8 lodged in .the lower part of the body 1.
  • the flame produced by the percussion of the primer 7 is adapted to provoke the firing of the detonator 9 through the medium of a transmission charge 10.
  • a first mechanism is provided for provoking a mechanical retardation between the moment at which an impact is produced on the rod 3 and the moment at which there is produced the percussion of the primer 7 by the point 6 of the striker '5.
  • the striker 5 is loaded by a spring 11.
  • said striker 5 has a collar 12 and the spring 11, engaged around the rod of the striker, tends to push this into the percussionvposb tion of the primer 7.
  • the striker 5 is retained in its normal position by a bolt 13, constituted, in the example shown, by a ball.
  • the position of said bolt 13 is controlled by a pusher 14 capable of being moved axially parallel to the geometrical axis of the fuze.
  • This pusher 14 has a recessed part 15 enabling the bolt 13 to release the collar 12 and thus the striker '5 when the said recess 15 is opposite the seating 16 in which the bolt 13 is disposed.
  • the axial movement of the pusher 14 is adapted to be provoked by the percussion rod 3- which is in contact with one of the ends of the said pusher 14.
  • the movements to which the parts 13 and 14 are to be subjected .for passing from their rest position, shown in FIG. 1, to their percussion position, shown in FIG. 5, necessarily requires a predetermined period of time, in view of the inertia and friction which must be overcome for moving said parts 13 and 14 allowing of the release of the striker 5.
  • Said fuze also comprises an automatic destruction device adapted to provoke the explosion of the projectile towards the end of its trajectory, particularly when the projectile has not reached its target.
  • This automatic destruction device is controlled from a sleeve 17 disposed around the percussion rod 3.
  • Said sleeve 17 is loaded by a spring 18 located between said sleeve and the percussion rod 3, said spring 18 bearing against a shoulder 19 of the body 1 of the fuze.
  • the automatic destruction of the projectile should therefore take place from said sleeve 17 and through the medium of said striker 5, thus through the same parts 13 and 14, utilised for the percussion by impact on the rod 3.
  • this automatic destruction device is controlled by a clockwork comprising essentially a driving sector 20 pivoting about an axis 21.
  • This driving sector 20' constitutes to some extent an activating member which, under the action of centrifugal force, comprises the motive force for driving the clockwork.
  • this driving sector 20 and the position of its pivotal axis 21 causes, when the projectile is driven in rotation about itself, the resultant centrifugal force to tend to produce a displacement of the driving sector 20 in the direction of the arrow 22 in FIG. 2.
  • the action of the clockwork on the auto-destruction device is effected through the medium of a slide 33 guided by the pusher 14.
  • said pusher 14 is tubular and the slide 33 is constituted by a rod sliding in the interior of the pusher 14.
  • the end 34 of said slide 33 bears against the driving sector 20 in the position of rest.
  • the other end 35 of said slide is subjected to the action of the sleeve 17 loaded by the spring 18.
  • the automatic destruction device can only function when the driving sector 2% ⁇ has released the end 34 of the slide 33 after having accomplished its complete angular movement (see position shown in broken lines in FIG. 2, as also FIG. 6).
  • the 'fuze also provided with a combined: safety tra- I 'je'ctory' and primer. I In fact, and as already indicated 'above', the prirner l is carried by aarnovahle support 8.
  • a safety device locks the balance device 32 at rest.
  • said safety device cornprises a slide 51 capable of sliding in a recess 52 provided radially in the body 1.
  • Said slide 51 carries a pin 53 for locking the balance device 32.
  • the slide 51 is maintained in the locking position, when at rest, by a spring 54 of the clamping spring type mounted in a groove of the body 1. Under the action of centrifugal force, when the projectile has left the mouth of the gun, the slide 51 withdraws radially from the axis of the fuze and releases the pallet fork 31.
  • a double safety device locks the pusher 14 in the position of rest.
  • This latter safety device comprises a locking slide 55 sliding in a radial groove 56 of the body 1.
  • the inner end 57 of this slide 55 is in the form of a fork and engages under the pusher 14 whilst passing on opposite sides of the rod or slide 33.
  • Said slide 55 which is sensitive to centrifugal force, is maintained in the locked position by a body 58 in the form of a piston 59 with an enlarged end.
  • This enlarged end 58 engages in a recess 60 of the slide 55.
  • Said body 58in the form of a piston is mounted in such a manner as to be capable of sliding in a cylinder 61 provided in the body 1 of the fuze parallel to the axis thereof.
  • a spring 62 loads the body 58 and the effect of this loading of the spring 62 on the said body 58 is added to the force of inertia of this I
  • This movable support 8 I is pivoted about
  • said I I l i 1 I I member '41 is constituted by a lever with two arms 43 I 3 and '44 pivoting about a spindle I arranged I parallel I I to the axis of the fuzei
  • I I I j r no'vablei support of the primer l' cannot move towards r I I its set position until after the 'pin' 42 has: released ⁇ the I arm 43, which occurs after the clockwork mechanism I i i :has functioned during ⁇ a predetermined I period of time;
  • s i I 'Said' fit-z e comprises a plurality of safety devices for i I I I .transport,adapted tolock its principal m'emhers for main- I I taining them in the rest position in spite :of the shocks which 'rnay inte rvene during the course of manipulation.
  • 'A first safet'y device 3 I is provided for maintaining the movable support 3 :in' I the non-armed position; 'As' wines seen inFIG; 4, this I I safety device comprises a piston'dd capable of sliding'in body due to. the: accelerationofzthe projectile in the. gun I I I during the firing.- This :double security: thus permits of I guaranteeing that the :pusher 14 is not release as l ng.
  • the position of the pin 42 on the wheel 26 is selected in such a manner that the fuze cannot be set into the armed position until after a predetermined period of time constituting in fact the gun and cover security of the fuze. This security may reach an order of magnitude of meters on the trajectory of the projectile.
  • the driving sector 20 continues its angular movement until it reaches the position indicated in broken lines in FIG. 2.
  • the slide 33 which "bears with friction by its end 34- on the upper part of the sector 20, is freed axially.
  • the release of the slide 33 then allows the sleeve 17 of the autoa very I strong axial acceleration towhich the projecti le; is;sub;- jected in the firing muzzle, all the dilferent members of: I gtheifuzeremain blocked, eventhosesensitiveto centrifu I gal force.
  • the slide 33 instead of being guided by the pusher 14, may be guided independently thereof in a bore provided for this purpose in the body 1 of the fuze.
  • the member 41 instead of being constituted by a lever with two arms, may also be constituted by a slide controlled by any element of the cinematic chain of the clockwork mechanism and controlling the movement of the movable support 8 of the primer 7 towards its armed position.
  • the number of wheels of the clockwork and the disposition thereof relatively one to another in the body of the fuze may be selected in any suitable manner.
  • these may be replaced by any other safety device sensitive to centrifugal force or to axial acceleration, of known construction.
  • a projectile fuze for use in a gun with a rifled bore said fuze including safety locking means for preventing detonation of said projectile during transport, the combination comprising a fuze body, an axially slidable percussion rod positioned within said body adjacent the point thereof, a spring-loaded striker also within said body and located below said percussion rod and out of axial alignment therewith, a primer carried by a movable support lying beneath said striker, a detonator beneath said primer, retardation means intermediate said percussion rod and said striker for delaying percussion of said primer upon impact of said fuze with an objective, said retardation means including an axially movable hollow shaft having a peripheral recess therein, the upper end of said shaft engaging said percussion rod, bolt means normally engaging said shaft and said striker to retain the latter in inoperative position, said striker moving to operative position when said shaft is driven inwardly by said percussion rod permitting the bolt means to enter the peripheral recess on said shaft thereby releasing said

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Telescopes (AREA)
  • Toys (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Air Bags (AREA)
US828137A 1958-07-25 1959-07-20 Projectile fuze for a gun with a rifled bore Expired - Lifetime US3039392A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH6226358 1958-07-25

Publications (1)

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US3039392A true US3039392A (en) 1962-06-19

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ID=4524188

Family Applications (1)

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US828137A Expired - Lifetime US3039392A (en) 1958-07-25 1959-07-20 Projectile fuze for a gun with a rifled bore

Country Status (7)

Country Link
US (1) US3039392A (en, 2012)
CH (1) CH346136A (en, 2012)
DE (1) DE1122416B (en, 2012)
ES (1) ES251006A1 (en, 2012)
FR (1) FR1229576A (en, 2012)
GB (1) GB928854A (en, 2012)
NL (2) NL233649A (en, 2012)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3129666A (en) * 1962-12-14 1964-04-21 Benjamin D Nabreski Mechanical time fuze
US3334589A (en) * 1964-02-07 1967-08-08 Mefina Sa Projectile fuze for a gun with a rifled bore
US3347166A (en) * 1965-04-02 1967-10-17 Mefina Sa Fuse for a missile to be fired by a gun with rifled bore
US3882782A (en) * 1971-10-11 1975-05-13 Mefina Sa Mechanically operated fuse for gyratory missiles

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL294249A (en, 2012) * 1962-06-21
DE1218311B (de) 1963-08-01 1966-06-02 Junghans Geb Ag Drallgeschosszuender fuer UEbungsgeschosse

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1863888A (en) * 1929-01-30 1932-06-21 Varaud Andre Fuse for artillery projectiles
US2449170A (en) * 1943-11-08 1948-09-14 Gen Time Instr Corp Bomb fuse
US2457254A (en) * 1947-09-18 1948-12-28 Borg George W Corp Delay arming device for fuses
US2537855A (en) * 1944-06-09 1951-01-09 Henry H Porter Point contact fuse
CH297451A (fr) * 1951-04-13 1954-03-31 Mefina Sa Dispositif de sécurité pour projectile girant.
US2825284A (en) * 1954-11-05 1958-03-04 Mefina Sa Impact fuzes with mechanical retardation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB396171A (en) * 1932-04-11 1933-08-03 Helmut Junghans Fuse for anti-aircraft shells
NL101169C (en, 2012) * 1951-04-13
DE1045285B (de) * 1955-01-31 1958-11-27 Junghans Geb Ag Drallgeschosszerlegerzuender

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1863888A (en) * 1929-01-30 1932-06-21 Varaud Andre Fuse for artillery projectiles
US2449170A (en) * 1943-11-08 1948-09-14 Gen Time Instr Corp Bomb fuse
US2537855A (en) * 1944-06-09 1951-01-09 Henry H Porter Point contact fuse
US2457254A (en) * 1947-09-18 1948-12-28 Borg George W Corp Delay arming device for fuses
CH297451A (fr) * 1951-04-13 1954-03-31 Mefina Sa Dispositif de sécurité pour projectile girant.
US2825284A (en) * 1954-11-05 1958-03-04 Mefina Sa Impact fuzes with mechanical retardation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3129666A (en) * 1962-12-14 1964-04-21 Benjamin D Nabreski Mechanical time fuze
US3334589A (en) * 1964-02-07 1967-08-08 Mefina Sa Projectile fuze for a gun with a rifled bore
US3347166A (en) * 1965-04-02 1967-10-17 Mefina Sa Fuse for a missile to be fired by a gun with rifled bore
US3882782A (en) * 1971-10-11 1975-05-13 Mefina Sa Mechanically operated fuse for gyratory missiles

Also Published As

Publication number Publication date
FR1229576A (fr) 1960-09-08
GB928854A (en) 1963-06-19
NL233649A (en, 2012)
NL96125C (en, 2012)
ES251006A1 (es) 1960-03-16
CH346136A (fr) 1960-04-30
DE1122416B (de) 1962-01-18

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