US2156471A - Percussion fuse - Google Patents

Percussion fuse Download PDF

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Publication number
US2156471A
US2156471A US198761A US19876138A US2156471A US 2156471 A US2156471 A US 2156471A US 198761 A US198761 A US 198761A US 19876138 A US19876138 A US 19876138A US 2156471 A US2156471 A US 2156471A
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US
United States
Prior art keywords
rod
fuse
spindle
lever
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
US198761A
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English (en)
Inventor
Denoix Paul Emile 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.)
SAGEB SA
Original Assignee
SAGEB SA
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 SAGEB SA filed Critical SAGEB SA
Application granted granted Critical
Publication of US2156471A publication Critical patent/US2156471A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • This invention relates to a percussion fuse adapted to be employed especially for priming aerial bombs and similar projectiles.
  • the auxiliary locking member comprises a lever having two limbs which bear with tight friction against flats on the necked spindle.
  • Still a further feature of the invention consists in that the limbs of the lever are connected with the spindle in such a manner as to be able to detach themselves therefrom under the action of a determined tensile stress, said lever having cams which cooperate with the stopper closing the fuse body for the purpose of applying a flange on the necked spindle against a packing joint on the stopper when the fuse is in the position for transport, the rocking of the lever effecting the withdrawal of said flange from said packing.
  • the arming of the fuse of the invention is retarded for a certain time after release of the bomb, by means of a clockwork movement, which comprises a spindle connected by a screw connection to one of the firing elements (striker or fuse carrier), said firing member being locked against rotation so that the rotation imparted to the spindle by the clockwork movement effects the gradual unscrewing of the firing member and, finally, its release which causes the arming of the fuse.
  • a clockwork movement which comprises a spindle connected by a screw connection to one of the firing elements (striker or fuse carrier), said firing member being locked against rotation so that the rotation imparted to the spindle by the clockwork movement effects the gradual unscrewing of the firing member and, finally, its release which causes the arming of the fuse.
  • the clockwork movement comprises a spiral spring which tends to cause the unscrewing of the aforesaid spindle, on which is keyed a ratchet-wheel meshing with an anchor adapted to pivot around an axis, imparting an oscillating motion to a balance-wheel through the intermediary of a pin carried by the latter.
  • the speed of rotation of the spindle engaging with the firing element may readily be regulated in the designing, by acting on the force of the spiral spring, as well as on the amplitude of oscillation and moment of inertia of the balance wheel.
  • Fig, l is an elevation of the fuse, in the position of rest
  • Fig. 2 is an axial section of the lower portion of the fuse of Fig. 1;
  • Fig. 3 is a section along the line 33 of Fig. 2;
  • Fig. 4 is a section along the line l 3 of Fig. 2;
  • Fig. 5 is a partial axial section of the upper portion of the fuse, showing the position of the parts during transport with handling;
  • Fig. 6 shows the parts after suspension of the bomb on the bomb releasing mechanism
  • Fig. '7 is a section of the upper part of the fuse, showing the position of the parts once the fuse is armed;
  • Figs. 8 and 9 show respectively the position of the striker when the fuse is armed and on impact
  • Fig. 10 is a section through the line Hll0 of Fig. 7, on a reduced scale.
  • Fig. 11 shows a detail.
  • the fuse comprises a body I on which is attached a case 2 containing a clockwork movement.
  • a striker 4 is adapted to slide and this striker 4 serves to strike against a primer 5 fixed in the body I. Between the primer 5 and the striker 4 is interposed a spring 6.
  • the striker is connected by a screw joint 1 to a spindle 3 of the clockwork movement in the case 2, and it is secured against rotation by a tongue 9 depending from a plate It! (integral with the fuse body I) and engaging in a longitudinal slot H in the striker 4.
  • a spiral spring I2 similar to a watch spring, tends to turn the spindle 8 in a direction such that the striker 4 tends to unscrew itself from the spindle 8 against the action of the spring 6.
  • the spindle 8 carries a ratchet wheel l3 engaging with a pawl l4 adapted to rock around an axis l5, carrying with it a balance-wheel l8 through the agency of the part E6 of the anchor M and a pin H.
  • a safety device comprising a pin l5 fixed to a tube 22 and engaging in a slot 2
  • the rod 25 is furnished, at a suitable point, with a neck 28 which, when located opposite the balls 26 (Fig. 7) enables the latter to engage therein, thus releasing the tube 20, which is then able to slide towards the rear over the sleeve 21.
  • the rod 25 is furnished with a flange 30, which retains it in the tube 20a, which is closed near its top by a plug 30a furnished with a packing 3512. Upon the plug 300 there is provided a stopper 3% which is fixed at the top of the tube 200..
  • the safety rod 25 is held in the position shown in Figs. 1, 2 and 7, against the action of the spring 22 by an auxiliary locking member or lever, indicated as a whole by 3
  • This lever has two lower limbs 32 (Fig. 11) and two upper limbs 32a which may be used as a handle to operate the lever.
  • the lower limbs bear, on the inside, two cams 32b which are intended to be applied with a tight frictional fit against flats 33 on the rod 25 (Fig.
  • Those cams comprise a lower cylindrical part 320 adapted to engage into a cylindrical cavity 32d of the same diameter provided in the stopper 320 which closes the top of the tube a.
  • the cams 321) At their upper part the cams 321) have tails 32 with cylindrical upper edges having the same diameter as the lower parts 326 but disposed eccentrically'in relation thereto.
  • the tails 32] may fit into cylindrical cavities 322', of corresponding diameter, in the shoulder connecting the upper part of the rod with the flats 33.
  • preferably has a hole 34 (Fig. 1) in which is engaged a cable or other releasing means enabling it to be disengaged from the rod 25 when the bomb is dropped.
  • is locked in the position shown in Figs. 1 and 5 by a safety pin or equivalent device 35 which passes through holes 35a (Figs. 6 and 10) of the lever 3
  • a safety pin or equivalent device 35 which passes through holes 35a (Figs. 6 and 10) of the lever 3
  • the flange 3B of the rod 25 is pressed against the packing b of the plug 30a.
  • the concave surface 322' of the rod 25 applies against the convex edge 32g of the tail 32f on the cam 325, whereas the lower cylindrical part 320 of said cam rests in the corresponding cavity 32d in the stopper 32c.
  • the limbs 32a. of the lever are joined by a transverse portion 32m (Fig. 11) adapted to bear against a member of the bomb-releasing mechanism, in order to prevent any untimely disengaging of the lever 32.
  • is shown as bearing against the screw brake 32k of the bomb-releasing mechanism, i. e., against a rod integral with the latter and intended to engage between the screw blades with which certain aerial bomb fuses are equipped, in order to prevent premature rotation.
  • the fuse operates as follows:
  • is pulled away after the screw brake 3270 has been shifted aside.
  • the pulling away of the lever causes at the beginning a slight movement of the rod 25 upwards; then the spring 22 pushes the rod 25 downwards, thus bringing the neck 23 opposite the balls 26, which engage therein.
  • the rod 25 is then arrested through its flange 30 encountering a bearing M) on the sleeve 21.
  • the tube 20, being then unlocked, is pushed upwards by its spring 22 and releases the pin l9 from the slot 2
  • the clockwork movement is set in motion.
  • the spindle 8 turns, and after a certain time completely unscrews the striker 4, which is then held apart from the primer 5 only by the spring 6.
  • the striker 4 is precipitated by inertia against the primer 6, which transmits the fire to the detonator and to the charge of the bomb in the usual manner.
  • a percussion fuse for aerial bombs comprising fuse body, a stopper to close the upper end of said fuse body, a packing on the inside of the stopper, a tube adapted to slide endwise in said fuse body, a cross-piece in said tube, a clockwork movement for retarding the arming of the fuse .after the release of the bomb, said clockwork movement comprising a spindle adapted to pivot in the fuse body, two firing elements, a screw connection joining one of the firing elements to said spindle, said cross-piece engaging said spindle to arrest it, means to arrest against rotation the firing member connected to the spindle, means to impart a rotation to said spindle, at least one locking element to lock said tube against movement, a bearing on said tube, a compression spring engaging by one end said bearing to urge the tube against said locking element, a rod adapted to slide in the fuse body, said rod being formed with opposite flats, a ring on said rod, a flange on said rod, said compression spring engaging by its other end said ring on the
  • a percussion fuse for aerial bombs comprising a fuse body, a stopper to close the upper end of said fuse body, a packing on the inside of the stopper, a tube adapted to slide endwise in said fuse body, a cross-piece in said tube, a clockwork movement for retarding the arming of the fuse after the release of the bomb, said clockwork movement comprising a spindle adapted to pivot in the fuse body, two firing elements, a screw connection joining one of the firing elements to said spindle, said cross-piece engaging said spindle to arrest it, means to arrest against rotation the firing member connected tothe spindle, means to impart a rotation to said spindle, at least one locking element to lock said tube against movement, a bearing on said tube, a compression spring engaging by one end said bearing to urge the tube against said locking element, a rod adapted to slide in the fuse body, said rod being formed with opposite flats, a i on said rod, a flange on said rod, said compression spring engaging by its other end said rod which is formed

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Control Devices (AREA)
  • Air Bags (AREA)
US198761A 1937-04-02 1938-03-29 Percussion fuse Expired - Lifetime US2156471A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU513725X 1937-04-02

Publications (1)

Publication Number Publication Date
US2156471A true US2156471A (en) 1939-05-02

Family

ID=19732819

Family Applications (1)

Application Number Title Priority Date Filing Date
US198761A Expired - Lifetime US2156471A (en) 1937-04-02 1938-03-29 Percussion fuse

Country Status (5)

Country Link
US (1) US2156471A (enrdf_load_stackoverflow)
BE (1) BE427301A (enrdf_load_stackoverflow)
DE (1) DE723553C (enrdf_load_stackoverflow)
FR (1) FR835961A (enrdf_load_stackoverflow)
GB (1) GB513725A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2469351A (en) * 1943-04-02 1949-05-10 Charles C Lauritsen Fuse

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982003272A1 (en) * 1981-03-13 1982-09-30 Robinson Paul Rodney A loop retention device for hook operated bomb arming solenoids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2469351A (en) * 1943-04-02 1949-05-10 Charles C Lauritsen Fuse

Also Published As

Publication number Publication date
FR835961A (fr) 1939-01-06
BE427301A (enrdf_load_stackoverflow)
DE723553C (de) 1942-08-06
GB513725A (en) 1939-10-20

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