US2893322A - Percussion fuse - Google Patents

Percussion fuse Download PDF

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Publication number
US2893322A
US2893322A US654596A US65459657A US2893322A US 2893322 A US2893322 A US 2893322A US 654596 A US654596 A US 654596A US 65459657 A US65459657 A US 65459657A US 2893322 A US2893322 A US 2893322A
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United States
Prior art keywords
piston
carrier
fuse
bore
chamber
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
US654596A
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English (en)
Inventor
Leroy Rene
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.)
Dixi SA
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Dixi 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 Dixi SA filed Critical Dixi SA
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Publication of US2893322A publication Critical patent/US2893322A/en
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    • 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
    • F42C15/24—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

  • My invention has for its object a percussion fuse for missiles, chiefly for mine throwers, said fuse incorporating a firing device adapted topivot in an inner chamber formed inside the fuse body and incorporating the detonator and the striker, associated with safety means operating on a mechanical delay principle.
  • Said percussion fuse is characterised according to my invention through the fact that the safety procedure is controlled through two cooperating interengaging coaxial pistons subjected to an elastic force, one of said pistons providing for the delay in the operation of the safety releasing means at the moment of the firing while the other piston acts subsequently so as to produce directly the release of the safety means,
  • Fig. l is a vertical cross-sectionpas sing through the axis of the fuse.
  • Fig. 2 is a transverse cross-section through line II-II of Fig. 1.
  • Fig. 3 is a similar section, showing however the different parts of the fuse in a different relative position.
  • Fig. 4 is a vertical cross-section of a portion of the fuse through line lV IV of Fig. 3. a
  • the body of the fuse includes three hollow cylinders or casings threadedly fitted inside one another coaxially as illustrated at 1, 2 and 3.
  • the hollow cylinder 1- is provided with an axial bore which serves for guiding an outer piston constituted by a sliding sleeve 4 and by a disc 4a secured to the outer end of the sleeve 4.
  • the outer piston 4-4a is held normally in the position illustrated in Fig. 1 by means of a locking ball 6 and in this position its inner end engages the outer end of the wall of the hollow cylinder 2, which end forms an abutment for said piston.
  • the locking ball 6 is partly engaged inside an annular groove 1a formed in the inner wall of the hollow cylinder 1 and it also engages partly the opening 4b formed in the sleeve 4 constituting the side wall of the piston 4-461.
  • the inner cylindrical surface of the sleeve 4 of the latter serves for guiding the inner piston 7.
  • the rod 5 of the outer piston 44a passes with a clearance through the bottom of said second inner piston 7 which is urged by a compression-spring 8 into contact with a projection or hub formed on the inner surface of the bottom 4a of the outer piston, said hub serving for the securing of the piston rod 5.
  • Said compression spring 8 engages through one end the transverse partition 2a closing the medial hollow cylinder 2 while the other end of said spring engages the sealing disc 9 provided with a central guiding member or hub through which said disc engages slidingly the piston rod 5 so as to move axially of the latter.
  • the spring 8 urges said disc 9 into contact with the inner surface 2,893,322 Patented July 7, 1959 of the bottom of the piston 7, so that said disc 9 closes fluidtightly the inner end of the annular clearance between the piston rod 5 and the bottom of the piston 7 through which said piston rod slides.
  • the sidewall of the piston 7 extends, for the position of the different parts illustrated in Fig. l, sufficiently far towards the hollow cylinder 2. so that the locking ball 6 may be held fast in its locking position.
  • a diaphragm 10 At the outer end of the axial bore in the hollow cylinder 1 is secured transversely a diaphragm 10 so as to form outside the bottom 4a of the piston 4 a piston chamber 11 which is fluidtightly closed on its outer side by said diaphragm.
  • a cylindrical chamber 12 in which is revolubly fitted a carrier member 13 in which are eccentrically secured the detonator and the striker.
  • the rotary axis of said carrier member 13 extends to the outside of the fuse axis in parallelism with the latter. Said axis is constituted in practice by a spindle 14 (Figs. 2, 3 and 4), one of the ends of which rests in the cover of the hollow cylinder 3 and the other end is carried by the partition 2a.
  • the carrier member 13 for the detonator is provided with a longitudinal bore 13b extending in parallelism with this rotary axis of carrier member 13'and the axis of which passes through a point of a circle drawn round said rotary axis of the carrier member 13 with a radius equal to the distance between the last mentioned axis and the axis of the fuse so that said bore 131: may register with the latter axis and cooperate then with the safety means as disclosed hereinafter.
  • On the same circle as this longitudinal bore is also provided the axis of the actual detonator 15 so that the latter may be readily substituted for the bore 13b upon firing and consequent release of the locking means whereby said detonator registers with the priming hole 3 as a preliminary step to ignition.
  • the piston rod 5 engages as illustrated in Fig. 1 the bore 13b in the detonator carrier 13 registering therewith so that said carrier is held in its locked position against the operation of the torsion spring 14a secured to the central spindle 14 of the carrier.
  • the cap 15 of the detonator held by the carrier 13 lies outside the axial line passing through the priming hole 3a and the bore 13b engaged by the piston rod 5; the priming hole 3a is furthermore closed by a small cover 16 carried by the lower surface of the carrier 13 and secured to the latter.
  • the small cover 16 is provided with a port 16a registering with the detonator.
  • a striker 17 is guided longitudinally inside a bore provided to this end inside the carrier 13, said striker being normally held in its inoperative position by a transverse rod adapted to be sheared.
  • the inner piston 7 moves under the action of the axial acceleration of the missile towards the lower end of the fuse as a consequence of its inertia while it overcomes the resistance of the compression spring 8.
  • the piston 4-461 which was held up to this moment in its locked position illustrated in Fig. 1, is thus released and may slide axially with reference to the cylinder 1.
  • the relative axial acceleration is cut off and consequently the compression spring 8 which has reached in the meantime its position of maximum compression has now a tendency to urge the sealing disc 9 outwardly and to return it into contact with the inner surface of the bottom of the piston 7 so that the central opening provided in the latter for the passage of the piston rod is now closed again in a fluidtight manner, through its inner end, by said disc 9.
  • the piston 7 moves now outwardly so that the air contained inside the chamber 7a is compressed, following which the piston 4a begins immediately moving in the same direction and compresses the air inside the outer chamber 11, at the outer end of the fuse.
  • the piston rod 5 moves with the piston 4-4a and, at the moment at which the latter has finished its stroke, said rod 5 no longer engages the bore 13b in the detonator carrier 13. Said carrier revolves then round its spindle 14 under the action of the torsion spring 14a. Following said rotation of the carrier 13 the striker 17 is substituted for the bore 13b in the location registering with the lower end of the piston rod 5 and the fuse is now ready to operate.
  • the diaphragm 10 is subjected to a pressure which urges the two pistons inwardly and consequently the piston rod 5 impinges on the striker 17 which shears the transverse rod 18 and ignites the detonator 15. The charge of the missile which is not illustrated is thus caused to explode since the flame passing through the priming hole 3a reaches the charge.
  • a percussion fuse for ammunition chiefly for mine thrower missiles, comprising a body provided with two coaxial cylindrical chambers communicating through a coaxial bore, a carrier adapted to revolve in the rear chamber around an axis parallel with and at distance from the axis of the chamber and provided with an axial bore adapted to register with the bore in the fuse body for a predetermined angular position of the carrier, a striker and a detonator longitudinally aligned therewith and carried by said carrier in register with the bore in the fuse body for another angular position of the carrier, means urging the carrier into its second last-mentioned position, two coaxial pistons fitted slidingly one inside the other, the outer piston being slidingly fitted in the front chamber of the fuse body, means locking the outer piston in its rearmost position with reference to the fuse body, a piston rod rigid with the outer piston passing through the inner piston with a clearance therebetween and extending for the rearmost position of the outer piston through the bore in the fuse body and through the bore in the carrier to hold the latter in the first
  • V 21 A percussion fuse for ammunition, chiefly for mine thrower missiles, comprising a body provided with two coaxial cylindrical chambers communicating through a coaxial bore, a carrier adapted to revolve in the rear chamber round an axis parallel with and at distance from the axis of the.
  • a percussion fuse for a missile comprising a body having two coaxial cylindrical chambers communicating through a coaxial bore, a carrier in said rear chamber disposed to revolve around an axis parallel with and at distance from the axis of said chambers and normally occupying an initial angular position in said rear chamber, a striker, a detonator longitudinally aligned with said striker, said striker and said detonator being carried by said carrier for registration with the bore in the fuse body for a second angular position of the carrier, a torsion spring engaging said carrier urging the carrier into its second position, two coaxial pistons fitted slidingly one inside the other, the outer piston being slidingly fitted in the front chamber, said outer piston having a recess therein extending therethrough, a locking ball held inside said recess for engagement with a corresponding section of a wall of said front chamber to lock said outer piston in its rearmost position with reference to said fuse body, said outer piston including a central projection on its inner side engaging the outer surfacetof said inner piston to

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Actuator (AREA)
US654596A 1956-09-05 1957-04-23 Percussion fuse Expired - Lifetime US2893322A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED23750A DE1018757B (de) 1956-09-05 1956-09-05 Aufschlagzuender fuer Geschosse, insbesondere Wurfminen

Publications (1)

Publication Number Publication Date
US2893322A true US2893322A (en) 1959-07-07

Family

ID=7037937

Family Applications (1)

Application Number Title Priority Date Filing Date
US654596A Expired - Lifetime US2893322A (en) 1956-09-05 1957-04-23 Percussion fuse

Country Status (5)

Country Link
US (1) US2893322A (en, 2012)
BE (1) BE556752A (en, 2012)
CH (1) CH342871A (en, 2012)
DE (1) DE1018757B (en, 2012)
GB (1) GB805993A (en, 2012)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3015277A (en) * 1957-05-20 1962-01-02 Junghans Helmut Percussion fuzes
US3320891A (en) * 1965-10-04 1967-05-23 Avco Corp Delayed action fuze
US3451340A (en) * 1966-07-28 1969-06-24 Tamerlan Anstalt Percussion fuze including rotary delay provisions
FR2594220A1 (fr) * 1986-02-07 1987-08-14 Mecanique Ste Nle Et Fusee-detonateur percutante instantanee pour projectiles non-girants
CN111928742A (zh) * 2020-06-30 2020-11-13 南京理工大学 一种提高擦地炸和自毁作用可靠性的引信
RU2780065C1 (ru) * 2022-01-25 2022-09-19 Юрий Иосифович Полевой Пистолет

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1116578B (de) * 1958-01-23 1961-11-02 E H Helmut Junghans Dr Ing Aufschlagzuender fuer drallose Geschosse
NL237128A (en, 2012) 1958-03-28
FR1274980A (fr) * 1960-08-08 1961-11-03 Fusée percutante pour roquette
FR20521E (fr) 1960-11-23 1918-05-08 Pierre Marie Dalery Tuyaux obtenus par enroulage de papier ou carton pour canalisations volantes
US3118378A (en) 1960-12-19 1964-01-21 Percussion fuze for rocket
DE1195206B (de) 1963-10-16 1965-06-16 Foersvarets Fabriksstyrelse Geschosszuender mit verzoegernder mechanischer Entsicherung
IL224201A (en) * 2013-01-13 2016-04-21 Elbit Systems Land & C4I Ltd Safety mechanism for obscurity

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2625881A (en) * 1949-08-03 1953-01-20 Rabinow Jacob Double element setback lock
US2807210A (en) * 1954-11-19 1957-09-24 Jr Nathaniel B Wales Mechanical integrating fuze
US2808000A (en) * 1954-06-10 1957-10-01 Harvey B Lindsay Point detonating fuze

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2625881A (en) * 1949-08-03 1953-01-20 Rabinow Jacob Double element setback lock
US2808000A (en) * 1954-06-10 1957-10-01 Harvey B Lindsay Point detonating fuze
US2807210A (en) * 1954-11-19 1957-09-24 Jr Nathaniel B Wales Mechanical integrating fuze

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3015277A (en) * 1957-05-20 1962-01-02 Junghans Helmut Percussion fuzes
US3320891A (en) * 1965-10-04 1967-05-23 Avco Corp Delayed action fuze
US3451340A (en) * 1966-07-28 1969-06-24 Tamerlan Anstalt Percussion fuze including rotary delay provisions
FR2594220A1 (fr) * 1986-02-07 1987-08-14 Mecanique Ste Nle Et Fusee-detonateur percutante instantanee pour projectiles non-girants
EP0235005A1 (fr) * 1986-02-07 1987-09-02 Societe Nouvelle D'etudes Et De Mecanique (S.N.E.M.) Fusée-détonateur percutante instantanée pour projectiles non-girants
CN111928742A (zh) * 2020-06-30 2020-11-13 南京理工大学 一种提高擦地炸和自毁作用可靠性的引信
RU2780065C1 (ru) * 2022-01-25 2022-09-19 Юрий Иосифович Полевой Пистолет

Also Published As

Publication number Publication date
CH342871A (fr) 1959-11-30
DE1018757B (de) 1957-10-31
GB805993A (en) 1958-12-17
BE556752A (en, 2012)

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