US2057410A - Percussion fuse - Google Patents

Percussion fuse Download PDF

Info

Publication number
US2057410A
US2057410A US71327A US7132736A US2057410A US 2057410 A US2057410 A US 2057410A US 71327 A US71327 A US 71327A US 7132736 A US7132736 A US 7132736A US 2057410 A US2057410 A US 2057410A
Authority
US
United States
Prior art keywords
balls
striker
fuse
notches
revolution
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
US71327A
Other languages
English (en)
Inventor
Birkigt Marc
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 US2057410A publication Critical patent/US2057410A/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
    • 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

Definitions

  • the present invention relates to percussion fuses for projectiles rotating about their axis along their trajectory and it is more especially, although not exclusively, concerned with fuses of this kind for projectiles of small calibre.
  • the object of the present invention is to provide a ⁇ fuse of thiskind which isbetter adapted to meet the requirements of practice than similar fuses made up to the present time.
  • the essential feature of the present invention consists in providing balls or the like for locking the striker of the fuse as long as it is necessary, and ⁇ in providing, around said balls, a chamber the walls of which are in the shape of a body of revolution, having notches formed therein for accommodating the balls, which can thus move out of locking engagement with the striker, the whole -being arranged in such manner that the balls, which turn with respect to said walls under the effect of the rotary movement of the projectile can penetrate into these notches only when the speed of said balls is little different from that of the wall of said chamber.
  • Fig. l is an axial sectional View of a percussion fuse according to the present invention.
  • Figs. 2, 3 and 4 are views, similar to Fig. 1, ⁇ showing the parts in diierent relative characteristic positions thereof;
  • Fig. 5 is a perspective view of one of the elements of the fuse
  • Fig. 6 is a sectional view on the line II-II of Fig. 2;
  • Fig? is a sectional view on the line III- III of Fig. 3.
  • the principle of the invention consists in locking the striker of the fuse by means of balls enclosed inside a cage which prevents them from escaping radially, said balls releasing said striker when they are allowed to move away from said striker to a certain distance therefrom.
  • said cage is provided with notches into which the balls can penetrate, but only after their speed of revolution "about the axis of the projectile has reached a value approximating the speed of revolution of the cage.
  • rst the body of the fuse, it consists of a hollow metallic part I which is prolonged rearwardly, in the usual manner, so as to form a chamber 2 in which are placed the detonator 3 and the priming charge 4.
  • This chamber is closed by a stationary piece 5, in the center of which there is provided antician 6, through which a striker 'I is slidably guided.
  • the front part of body I is hollowed out so as to form a chamber 8 communicating, at its front part with an axial bore 9, closed, at the front part, by a small plate I0.
  • the striker 'I includes, on the one hand, a head II adapted to slide in bore 9, and, on the other hand, an enlarged portion I2, located for instance in the intermediate part of said striker, said enlarged portion forming a stop adapted to cooperate with locking balls I3.
  • I further provide, in chamber 8, an element capable of preventing a rearward displacement of the balls, said element consisting, for instance, as shown by the drawing, of a cylindrical sleeve I4 carried by piece 5 and the front edge of which is of conical shape, with an apical angle of say 120.
  • I provide means whereby the balls are held between enlarged portion I2 and sleeve I4 before the shot is red, Whereas, immediately after the shot has been fired, the notches adapted to cooperate with said balls are brought opposite said balls.
  • Chamber 8 is made of a shape such that its lateral wall surrounds, with a slight peripheral clearance space, balls I3 in the locking position thereof, notches I5 being provided in said wall opposite said balls. Between balls I3 and said wall, there is interposed a partition, either adapted to be easily torn (paper, tin sheet) or adapted to be moved out of the way when the shot is red, under the effect of inertia.
  • a longitudinal housing I6 for instance atleast partly cylindrical and which may extend rearwardly around sleeve I4.
  • the enlarged portion I2 of the striker must be located in the front part of said housing I 6 (Figs. 1 to 3).
  • a ring-shaped member I1 preferably cylindrical and of uniform thickness, securely but elastically held in said housing.
  • said ring-shaped member is slit, and it is given a size such that it is necessary to contract it from inserting it into housing IB.
  • the friction thus produced is suflicient for preventing any displacement of said member Il' in housing I5 as long as said member is not urged by an enormous force,rsuch as that which acts on the parts when the shot is fired.
  • This ring-shaped member I'I is made of such a height and thickness that, on the one hand, in its front position (Fig. 1), which it is given when the parts are assembled, its rear part is located inthe same transverse plane of the balls when the latter are located between sleeve Ill anden- Ylarged part I 2, thus keeping said balls in the locking position, and, on the other hand, in its rear position (Figs. 2 to .4), said member I1 has its frontpart in the same transverse plane as the balls, which it would still keep in the locking position if said front part of member Il were not especially devised.
  • This front part of member I1 is provided with notches I5 such that, in the rear position of member Il, said notches are in the same transverse plane as balls I3 for the locking position of said balls.
  • These notches are made of such asize that a ball I3 can freely enter into each of them and that, after havingv entered said notches, said balls can move out therefrom toward the front of the front edge of ring I'I, by moving around the edge of enlarged portion I2 of the striker.
  • the device above described is completed by providing, in housing I6, a peripheral groove I8 devised in such manner that, after passing through the notches, balls I3, instead of coming into contact with a cylindrical wall, meet aconical wall, ⁇ of an apical angle of say 60, along which they roll and simultaneously move toward vthe front, under the effect'of the centrifugal force,
  • the time necessary for releasing the striker determines the margin of safety. This time may be varied by acting, among other things, on the mass of the balls, the number of said balls, the Width of the notches, which may be substantially greater than the diameter of the balls and the shape of the solid parts extending between said notches. It is therefore possible to adjust at will the distance from which, after having left the gun, the shell shall be capable of exploding.
  • the number of balls is equal to the number of notches (for instance four), but the number of said elements might be different.
  • a fuse for a projectileintended to move along its trajectory with a rotary movement about said trajectory which comprises, in combination, a fuse body, a detonator carried by said body, an axial striker movable in said body for action on said detonator, an annular element rigid angularly wth'said body coaxially surrounding said striker, a plurality of members normally applied against said striker so as to lock it in a position out of contact with said detonator, said members being adapted to run with a rolling movement on the inner Wall of said element, said element being provided with a plurality of recesses adaptedto accommodate said members so ⁇ as to permit said members to move radially away from said striker and thus to unlock it, whereby said unlocking action takes place only when, due to frictions, said members roll inside said element at a speed approximating the speed of revolution of said fuse about its axis.
  • a fuse for a projectile intended to move along its trajectory with a rotary movement about said trajectory which comprises, in coml bination, a fuse body, a detonator carried by said body, an axial striker movable in said body for action on said detonator, an annular element, rigid angularly with said body, coaxially surrounding said striker, a plurality of members adapted to operatively engage said striker for llocking it in a position out of contact with said detonator, means for keeping said members in the locking position thereof, adapted to be brought out of action by the acceleration undergone by said projectile when it is fired, said members being adapted to run with a rolling movement on the inner wall of said element, said element being provided with a plurality of recesses adapted to accommodate said members so as to permit said members to move radially away from Vsaid striker and thus to unlock it, whereby said unlocking action takes place only when, due to frictions, said members roll inside said element with a speed of revolution about the axi
  • a fuse for a projectile intended to move along its trajectory with a rotary movement about said trajectory which comprises, in combination, a fuse body, a detonator carried by said body, an axial striker movable in said body for action on said detonator, an annular element, rigid angularly in said body and movable axially with respect thereto, coaxially surrounding said striker, a plurality of balls between said striker and said element adapted to operatively engage said striker, stop means for preventing rearward movement of said balls, whereby said balls, when engaged with said striker, lock it in a position out of contact with said detonator, said annular element fitting with a considerable amount of friction inside said housing in a normal position such that the solid rear part of said element keeps said balls in operative engagement with said striker, said annular element being provided with notches in its front part adapted to come into the same transverse plane as said balls when said element is displaced by inertia in said housing into its rear position, said notches being adapted
  • a fuse according toclaim 3 in which said stop means for preventing rearward movement of said balls consist of a sleeve rigid with said body and the front edge of which is bevelled so as to form an annular cup-shaped bearing for the balls.
  • a fuse according to claim 3 in which said annular element consists of a sleeve, slit longitudinally, mounted with a force fit inside said body.
  • a fuse according to claim 3 in which said body is provided with a chamber having conically divergent walls extending ahead of said notches, whereby said balls after passing into said notches escape frontwardly along the conical walls of said chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Golf Clubs (AREA)
  • Air Bags (AREA)
US71327A 1936-01-18 1936-03-27 Percussion fuse Expired - Lifetime US2057410A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE193952X 1936-01-18

Publications (1)

Publication Number Publication Date
US2057410A true US2057410A (en) 1936-10-13

Family

ID=3864538

Family Applications (1)

Application Number Title Priority Date Filing Date
US71327A Expired - Lifetime US2057410A (en) 1936-01-18 1936-03-27 Percussion fuse

Country Status (5)

Country Link
US (1) US2057410A (fi)
BE (1) BE413384A (fi)
CH (1) CH193952A (fi)
FR (1) FR816413A (fi)
GB (1) GB454005A (fi)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11554355B2 (en) 2020-11-05 2023-01-17 Fudan University Micro reaction system and method for preparing 2-methyl-4-amino-5-cyanopyrimidine using same

Also Published As

Publication number Publication date
FR816413A (fr) 1937-08-07
GB454005A (en) 1936-09-22
BE413384A (fi)
CH193952A (fr) 1937-11-15

Similar Documents

Publication Publication Date Title
US2595757A (en) Fuse
US3465676A (en) Safety system for the fuse of a gyratory missile
US3576165A (en) Safety projectile percussion primer
US3557701A (en) Hand-grenade fuze
US3994230A (en) Self-destruction type nose impact fuze for spinning projectiles
US2167197A (en) Fuse for rotative projectiles
US2871788A (en) Impact fuzes for explosive projectiles including a mechanical self-destruction device
US3732825A (en) Impact fuze for a spin stabilized projectile
US3410214A (en) Percussion fuze
US2057410A (en) Percussion fuse
US2692557A (en) Fuse
US3033115A (en) Nose fuzes of the percussion type including a self-destruction device
US4449455A (en) Inertia fuse with a self-destruct device for use in spinning projectiles
US2359752A (en) Percussion fuse
US2924176A (en) Centrifugally armed and self-destroying impact fuze
US4406225A (en) Ignition fuse for spin-stabilized projectiles
US1375466A (en) Impact-fuse
US4223608A (en) Safety device for percussion-fuse of rifled missiles
US2962968A (en) Centrifugally armed and selfdestroying impact fuze
US5670736A (en) Priming system for the explosive charge of a submunition on board a carrier
US3347166A (en) Fuse for a missile to be fired by a gun with rifled bore
US1842467A (en) Point detonating fuse
US2650541A (en) Fuze
US3417701A (en) Detonating fuse for bombs and the like
US3961578A (en) Point-detonating projectile fuze