US3417701A - Detonating fuse for bombs and the like - Google Patents

Detonating fuse for bombs and the like Download PDF

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Publication number
US3417701A
US3417701A US634735A US63473567A US3417701A US 3417701 A US3417701 A US 3417701A US 634735 A US634735 A US 634735A US 63473567 A US63473567 A US 63473567A US 3417701 A US3417701 A US 3417701A
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US
United States
Prior art keywords
detonator
rod
fuse
piston
bore
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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
US634735A
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English (en)
Inventor
Gaston Jean O Bodinaux
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.)
Les Forges de Zeebrugge SA
Original Assignee
Les Forges de Zeebrugge SA
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Filing date
Publication date
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Classifications

    • 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
    • F42C9/10—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by combustion
    • 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
    • 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
    • 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
    • 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
    • F42C15/28—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids
    • F42C15/31—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids generated by the combustion of a pyrotechnic or explosive charge within the fuze

Definitions

  • a d-etonating fuse of a bomb is provided with an additional safety device to cause the explosion at a predetermined time after impact, the device having an additional locking element for the movable detonator carrying member, whereby the locking element is released after impact by a portion of the pyrotechnic chain conditioned for that purpose.
  • This invention relates to a detonating fuse for bombs and the like, said fuse being conditioned to allow a bombardment at low altitude, while providing a maximum safety to the releasing plane.
  • this invention relates to a detonating fuse for bombs and the like of the type comprising an arming mechanical device provided to release, after a given time and by the withdrawal of a locking element, a moving detonator carrying member, characterized in that the said detonator carrying member is controlled by a second locking element, the latter being made inactive after impact by the combustion of a portion of the pyrotechnic chain conditioned for that purpose.
  • the object of the present invention is to provide means for maintaining the said pyrotechnic chain not aligned for a given time after impact, particularly to provide a maXimum safety to the releasing plane, principally when bombarding at low altitude.
  • the present invention provides additional means for locking the said detonator carrying drum, said additional means being made inactive after impact by the combustion of a portion of the pyrotechnic chain conditioned therefor. Due to this arrangement, any risk of explosion of the bomb at the impact is systematically avoided, said explosion occurring with a predetermined delay and independently from the proper percussion.
  • FIGURE 1 is a longitudinal section of a fuse according to the invention, the plane of said section being indicated on line II of FIGURE 4 and FIGURES 2 to 7 are sections according to the lines indicated on FIGURE 1 respectively as IIII, III-III, IV-IV, V-V, VI-VI and VIIVII.
  • the fuse represented in the enclosed drawings comprises a fuse body 1 on which is mounted a moving head 2 containing namely a reducing gear 3 of a known type and which is not therefore further represented.
  • this reducing gear 3 actuates the angular movement of a hammer rod 4 moving axially within body 1 and coaxial therewith.
  • This rod 4 is provided with a cylindrical mass 5 and enters, at the hammer side 6, the axial bore 7 of a hammer guide 8.
  • the rod 4 is provided with a groove 9 into which penetrates a projection 10 of the bore of the hammer guide 8 (FIGURE 6) in such manner that the angular movement of rod 4 causes a similar angular movement of 3,417,701 Patented Dec.
  • the annular base 11 of the hammer guide 8 opposes normally any axial movement of a rod 12 returned to said hammer guide 8 by a spring, the free end of said rod 12 being provided with a locking piston 13.
  • said piston is arranged to oppose any rotating movement of the detonator carrier 14 about its axis 15 under the action of spring 16 (FIGURE 4).
  • a cut-out 17 is provided in the annular base 11 of the hammer guide 8 in such manner that, when the latter is rotating under the effect of reducing gear 3, this cut-out 17 comes, after a given time, in front of said rod 12, the latter being then allowed to escape freely under the action of its spring 13.
  • the annular base 11 of hammer guide 8 is provided with an approximately semi-circular groove 18 into which is engaged the end of a shear pin 19 carried by the corresponding end of said rod 12.
  • piston 13 To avoid any axial rotation of piston 13, the latter is provided with a longitudinal groove 20 into which is engaged one end of a guide pin 21 inserted in a housing 22 of the fuse body.
  • piston 13 On a portion of its periphery, piston 13 is provided with a recess 23 into which, when the said piston is moved to its inactive position, is engaged the end of a lock 24 actuated by a spring 25 (FIGURE 5 In this way, piston 13 is prevented to return into the locking position at the impact.
  • an additional means for locking the detonator carrier 14 said means consisting substantially of an axially moving rod 26 one end of which is engaged, in normal locking position, into a semi-cylindrical recess 27, provided therefor at the periphery of the detonator carrier 14.
  • the said rod 26 extends through a guiding bore 28 and then into a cylindrical chamber 29, said chamber being provided in the fuse body.
  • the rod 26 carries a piston 30 engaging with an easy fit the wall of said chamber 29, said rod 26 being ended by a conical head 31.
  • the rod 26 being in a locking position, its conical head 31 bears upon a fan washer 32 leaning with its outer edge on the rim of a curved opening 33 provided in the bottom of said chamber 29.
  • the said chamber '29 communicates upstream of piston 39 relative to conical head 31 with an axial bore 34 provided in the fuse body via two blind bores at right angles 35 and 36 respectively (FIGURE 3). Said blind bores are closed the one by a pin 37 and the other, by a screw 38.
  • a delay charge 39 Into the axial bore 34 is introduced a delay charge 39, the said axial bore being closed at the hammer side 6 by a primer 40 and, at the side of the detonator carrier 14, by a relay 41.
  • the primer 49, the delay charge 39, the relay 41 and the detonator 42 are forming the pyrotechnic chain of the fuse.
  • the above described fuse operates as follows: the arming is effected as usual by rotating the reducing gear 3, the angular movement of which during a given time brings the cut-out 17 of base 11 in front of rod 12 of the locking piston 13 after having sheared pin 19.
  • the rod 12 is then pushed back by the spring to such a distance that the piston 13 releases the detonator carrier 14, said piston 13 being kept in its inactive position by means of lock 24 which, under the action of its spring 25, penetrates the recess 23 provided on the said piston 13.
  • the detonator carrier 14 is always kept in its initial position by the end of rod 26.
  • the inertia of mass 5 brings violently the hammer 6 against primer 40 which fires the delay charge 39.
  • the latter preferably conditioned to burn in parallel layers has a predetermined combustion time.
  • the passageway 36 is freed and the combustion gases are penetrating, via passages 36 and 35, into chamber 29 in which they retract piston 30, thereby causing rod 26 to unlock the detonator carrier 14.
  • the conical head 31 thereof penetrates into opening 33 by slightly forcing the fan washer 32, the latter being then closed back to avoid any return of said rod 26.
  • the detonator carrier 14 is angularly displaced by its spring 16 about its pivot 15 in such manner as to bring detonator 42 into alignment with the pyrotechnic chain of the fuse.
  • the latter fires relay 41 which, in turn, fires detonator 42.
  • the above described device allows to obtain always after impact a delay equal to the predetermined combustion time of the delay charge 39 provided, of course, that the arming mechanism has operated.
  • any risk of accidental firing of the bomb by the percussion of detonator 42 at the impact is eliminated since the latter is kept away from the pyrotechnic chain at the impact and well after the latter.
  • This feature is particularly important when bombarding at low altitude, for which case it is, of course, essential that the releasing plane be not damaged by the blow of the explosion of the bomb just released.
  • a detonating fuse for bombs and the like comprising a mechanical arming device having a locking member, a detonator, a movable member carrying said detonator and released after a given time by the withdrawal of said locking member, a rod constituting a second locking member and controlling said detonator carrying member, a fuse body having an axial bore and a second bore parallel to said axial bore, a delay charge located in said axial bore, said delay charge and said detonator constituting a pyrotechnic chain, said rod extending into said second bore, and a piston connected with said rod, the space between an end of said second bore and a face of said piston communicating with said axial bore, said rod being rendered inactive as a locking member after impact by combustion of a portion of said pyrotechnic chain.
  • a time fuse for a bomb and the like comprising a casing, movable percussion means, a body member having an axial bore and a second bore parallel to said axial bore, a movable carrier, a detonator mounted in said carrier, said movable percussion means, said body member and said movable carrier being located one next to the other in said casing, a delay charge located in said axial bore and having an end normally located in front of said percussion means, the other end of said delay charge being normally located out of alignment with said detonator, thereby interrupting a pyrotechnic chain formed by said delay charge and said detonator, a locking element mounted in said second bore and normally locking said movable carrier, and a piston connected with said locking element, said body member having a passage extending between said axial bore and said second bore and terminating at one end at a distance from an end of the axial bore and terminating at the other end between said piston and the end of said second bore which is adjacent to said movable carrier, whereby

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Emergency Lowering Means (AREA)
US634735A 1966-10-28 1967-04-28 Detonating fuse for bombs and the like Expired - Lifetime US3417701A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE2046179 1966-10-28

Publications (1)

Publication Number Publication Date
US3417701A true US3417701A (en) 1968-12-24

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ID=3864837

Family Applications (1)

Application Number Title Priority Date Filing Date
US634735A Expired - Lifetime US3417701A (en) 1966-10-28 1967-04-28 Detonating fuse for bombs and the like

Country Status (9)

Country Link
US (1) US3417701A (no)
BE (1) BE688993A (no)
CH (1) CH465443A (no)
DE (1) DE1578473A1 (no)
ES (1) ES342715A1 (no)
GB (1) GB1179298A (no)
GR (1) GR32934B (no)
NL (2) NL6708631A (no)
NO (1) NO121772B (no)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4489656A (en) * 1983-02-22 1984-12-25 The United States Of America As Represented By The Secretary Of The Navy Penetrating ordnance safe and arming mechanism
WO1987001193A1 (en) * 1985-08-22 1987-02-26 Oregon Etablissement Für Patentverwertung Double-acting fuse for missiles
WO1987001192A1 (en) * 1985-08-22 1987-02-26 Oregon Etablissement Für Patentverwertung Double-action fuse for missiles
FR2850455A1 (fr) * 2003-01-25 2004-07-30 Junghans Feinwerktechnik Gmbh Detonateur de projectile
CN115077310A (zh) * 2022-06-30 2022-09-20 江苏永康机械有限公司 一种多保险发烟引信

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3907006A1 (de) * 1989-03-04 1990-09-06 Diehl Gmbh & Co Sicherungseinrichtung eines geschosszuenders

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1898073A (en) * 1926-09-20 1933-02-21 Secretary Of War Delay fuse for drop bombs
US2005053A (en) * 1932-07-13 1935-06-18 Rheinische Metallw & Maschf Fuse for projectiles and particularly for small caliber high explosive projectiles
US2838999A (en) * 1954-04-27 1958-06-17 Bombrini Parodi Delfino Sensitive fuses
US2984184A (en) * 1957-03-28 1961-05-16 Cetre Jeanne Marie Louise Fuse for gyrating and non-gyrating projectiles
US3119336A (en) * 1960-04-02 1964-01-28 Bofors Ab Fuze for an explosive projectile

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1898073A (en) * 1926-09-20 1933-02-21 Secretary Of War Delay fuse for drop bombs
US2005053A (en) * 1932-07-13 1935-06-18 Rheinische Metallw & Maschf Fuse for projectiles and particularly for small caliber high explosive projectiles
US2838999A (en) * 1954-04-27 1958-06-17 Bombrini Parodi Delfino Sensitive fuses
US2984184A (en) * 1957-03-28 1961-05-16 Cetre Jeanne Marie Louise Fuse for gyrating and non-gyrating projectiles
US3119336A (en) * 1960-04-02 1964-01-28 Bofors Ab Fuze for an explosive projectile

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4489656A (en) * 1983-02-22 1984-12-25 The United States Of America As Represented By The Secretary Of The Navy Penetrating ordnance safe and arming mechanism
WO1987001193A1 (en) * 1985-08-22 1987-02-26 Oregon Etablissement Für Patentverwertung Double-acting fuse for missiles
WO1987001192A1 (en) * 1985-08-22 1987-02-26 Oregon Etablissement Für Patentverwertung Double-action fuse for missiles
FR2850455A1 (fr) * 2003-01-25 2004-07-30 Junghans Feinwerktechnik Gmbh Detonateur de projectile
CN115077310A (zh) * 2022-06-30 2022-09-20 江苏永康机械有限公司 一种多保险发烟引信

Also Published As

Publication number Publication date
NO121772B (no) 1971-04-05
BE688993A (no) 1967-04-28
ES342715A1 (es) 1968-08-01
CH465443A (fr) 1968-11-15
DE1578473A1 (de) 1971-11-25
GB1179298A (en) 1970-01-28
NL6708631A (no) 1968-04-29
NL132549C (no)
GR32934B (el) 1967-10-05

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