US3308761A - Electric fuses for projectiles - Google Patents

Electric fuses for projectiles Download PDF

Info

Publication number
US3308761A
US3308761A US398322A US39832264A US3308761A US 3308761 A US3308761 A US 3308761A US 398322 A US398322 A US 398322A US 39832264 A US39832264 A US 39832264A US 3308761 A US3308761 A US 3308761A
Authority
US
United States
Prior art keywords
support
rod
housing
fuse
detonator
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
US398322A
Other languages
English (en)
Inventor
Vilbajo Jean
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.)
Contigea SA
Original Assignee
Contigea 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 Contigea SA filed Critical Contigea SA
Application granted granted Critical
Publication of US3308761A publication Critical patent/US3308761A/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
    • F42C11/00—Electric fuzes
    • F42C11/06—Electric fuzes with time delay by electric circuitry
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes
    • F42C11/02—Electric fuzes with piezo-crystal
    • 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
    • F42C15/40—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected electrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/06—Electric contact parts specially adapted for use with electric fuzes

Definitions

  • the electric detonator must be short-circuited during storage and connected to the generator for firing.
  • the detonator is outside the pyrotechnic alignment, it must be displaced when the shot is fired and the electrical connections are therefore secured by moving contacts, i.e. by devices whose reliability does not exceed 95%.
  • the object of the present invention is to provide an improvement of electric fuses for projectiles belonging to the type with a permanent pyrotechnic chain comprising at least one charge, one detonator and one fuse, this improvement consisting in introducing into aforesaid fuse means for ensuring disalignment at least between aforesaid fuse and aforesaid detonator, and means for reestablishing this alignment when firing.
  • the improvements disclosed by the present invention do away with the necessity of using fuse/detonator aggregates and thus also do away with the risks attending the manufacture of the latter.
  • this classical process involves the setting of a fuse/detonator, which is always a source of danger because this aggregate contains substances which are likely to explode by shock.
  • FIGURE 1 illustrates a radial section of an improved electric fuse in its state of rest
  • FIGURES is a view along arrow P6 of FIGURE 1;
  • FIGURE 7 is a view similar to that of FIGURE 1, in
  • FIGURE 8 is a section by a plane whose trace follows the straight line VIII-VIII of FIGURE 7.
  • the electric fuse is represented by a hollow body 1 shaped externally so as to make it possible to fasten it at the height of the junction between the body and the chain of the projectile or in any other appropriate position. 7
  • the body is divided into two chambers 23 by an intermediate partition 4 which itself has a chamber 5 communicating with aforesaid chambers 2 and 3.
  • aforesaid hollow body 1 has an inner screw thread 6 into which is screwed a ring 7 which, in turn, is provided with an inner screw thread 8 into which is screwed the container 9 of a charge 10 which is part of the pyrotechnic chain for firing the projectile.
  • a priming system 11 which, according to one of the main features of the invention, is fixed. It is housed in a case 12 of conducting material.
  • the aXis 13 of this priming device passes through an insulating partition 14 lining the adjacent bottom of aforesaid chamber 3 and bears against a little metal plate 15 resting onto aforesaid insulating material 14.
  • the only metal contact of the priming system 11-13 thus consists of aforesaid little plate 15 which, in the position of rest of the fuse, makes straight contact with the collar 16 of a rod 17 which is permanently acted upon by a return spring 18.
  • This rod penetrates by one of its ends into aforesaid chamber 2 and forms a stop for a drum 19.
  • the latter is housed in aforesaid chamber 2, has a cross-section of triangular shape and is mounted with an easy fit on a fixed axis 20.
  • Aforesaid drum 19 has on its periphery a notch 23 and is constantly urged toward its cocked position by a spring 24 wound about part of the 7 axis 20 in such way that one of its ends bears against the inner wall of aforesaid chamber 2 and that its other end bears against the bottom of a notch 23 provided for this purpose in aforesaid drum 19.
  • the priming system 11 is automatically and systematically shorted via axis 13, plate 15, collar 16, and rod 17.
  • the body of the fuse comprises a second rod 26 parallel to aforesaid rod 17 and also having a collar 27 permanently urged by means of a return spring 28.
  • the part of rod 26 comprised between aforesaid collar 27 and chamber 2 of the fuse body is engaged with an easy fit into the tubular sheath made of insulating material 29 which goes right through aforesaid insulating partition 14 lining the bottom of chamber 3.
  • Aforesaid return spring 28 bears, on the one hand, against aforesaid collar 27 and, on the other hand, against a metal plate 30 which in turn rests against the base 31 made of insulating material, which forms the guiding element of a second part of aforesaid rod 26.
  • the metal plate 30 is directly into contact with the end element 32 into which is engaged and fastened one of the extremities of conductor 33, the other extremity of which is connected to a piezoelectric generator.
  • the piezoelectric generator as long as the fuse is in the position of rest or standby, is short-circuited via the end element 32, the metal plate 30, the return spring 38, the collar 27 the rod 26 and the drum 19 with which the adjacent extremity of aforesaid rod 2 6 is directly into contact through the push exerted on it by the return spring 28.
  • a stud 35 is fastened and serves as support for one of the ends of an elastic strip 36 the other end of which permanently bears against the protruding part of aforesaid rod 17.
  • the latter has, at an appropriate distance, a peripheral groove 37 which is such that, in its drawn-in position, aforesaid rod 17 is locked through the fact that aforesaid strip 36 is engaged into aforesaid peripheral groove 37.
  • the resulting improved fuse operates as follows: in its position of rest or standby, it looks as illustrated in FIG- URES 1 to 5.
  • Drum 19 is held in its withdrawn position against the action of the elastic element 25 by the corresponding end of rod 17, acting as a bolt. In this position, the priming system 11 and the piezoelectric generator are systematically shorted as indicated before.
  • Aforesaid priming system 11 remains perfectly immovable, whether the fuse is in the position of rest or cocked.
  • An electric fuse for a projectile having an electric generator, said fuse comprising a hollow housing, a primer fixedly mounted in said housing, a detonator, a support pivotally mounted within said housing and carrying said detonator, an elastic element engaging an inner wall of said housing and said support, said elastic element pressing said support from an inoperative position to an operative position wherein a pyrotechnic chain is established through said generator, said detonator and said primer, a rod slidably mounted in said housing, a second elastic element pressing said rod against said support to maintain said support in said inoperative position, said rod being withdrawn from engagement with said support when the projectile is launched, a second rod slidably mounted in said housing, and a third elastic element pressing the second-mentioned rod against said support to maintain said support in its operative position, the first-mentioned rod short-circuiting said primer when said support is in its inoperative position and removing this short circuit when said support is in its operative position, the second mentioned rod short-circuiting said generator when
  • An electric fuse for a projectile having an electric generator, said fuse comprising a hollow housing consisting of an electrically conducting material, a primer having a case with opposed open ends and consisting of an electrically conducting material, said case being mounted in said housing and being in electrical contact therewith, and contact means having a portion extending through an open end of said case and consisting of an electrically conducting material; a detonator, a support pivotally mounted within said housing and carrying said detonator, an elastic element engaging an inner wall of said housing and said support, said elastic element pressing said support from an inoperative position to an operative position wherein a pyrotechnic chain is established through said generator, said detonator and said primer, a rod consisting of an electrically conducting material, said rod being slidably mounted in said housing and being in electric contact therewith, a collar carried by said rod, a second elastic element engaging said collar to press said rod against said support to maintain said support in said inoperative position and to move said collar in en-ga-gement with said contact means to short
  • An electric fuse for a projecticle comprising an electrical conductor for the supply of electrical current, a hollow housing consisting of an electrically conducting material, a primer having a case with opposed open ends and consisting of an electrically conducting material, said case being mounted in said housing and being in electrical contact therewith and contact means having a portion extending through an open end of said case and consisting of an electrically conducting material; a detonator, a support consisting of an electrically conducting material, said support being pivotally mounted Within said housing and carrying said detonator, an elastic element engaging an inner wail of said housing and said support, said elastic element pressing said support from an inoperative position to an operative position wherein a pyrotechnic chain is established, a rod consisting of an electrically conducting material, said rod being slidably mounted in said housing and being in electric contact therewith, a collar carried by said rod, a second elastic element engaging said collar to press said rod against said support to maintain said support in said inoperative position and to move said collar in engagement with said contact means to shortcir

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Air Bags (AREA)
US398322A 1963-09-30 1964-09-22 Electric fuses for projectiles Expired - Lifetime US3308761A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
BE511362 1963-09-30
BE637973A BE637973A (xx) 1963-09-30 1963-09-30
BE5002406 1963-09-30
BE652467A BE652467A (xx) 1963-09-30 1964-08-31

Publications (1)

Publication Number Publication Date
US3308761A true US3308761A (en) 1967-03-14

Family

ID=27424732

Family Applications (1)

Application Number Title Priority Date Filing Date
US398322A Expired - Lifetime US3308761A (en) 1963-09-30 1964-09-22 Electric fuses for projectiles

Country Status (8)

Country Link
US (1) US3308761A (xx)
BE (2) BE637973A (xx)
CH (1) CH414403A (xx)
DE (1) DE1276510B (xx)
FR (1) FR1408558A (xx)
GB (1) GB1026224A (xx)
IL (1) IL22135A (xx)
NL (1) NL6411175A (xx)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4592281A (en) * 1982-07-29 1986-06-03 Special Devices, Inc. Arming and firing device
DE8322610U1 (de) * 1983-08-05 1985-01-17 Diehl GmbH & Co, 8500 Nürnberg Sicherungseinrichtung fuer bodenaufschlagzuender bei streumunition
US5279226A (en) * 1992-11-04 1994-01-18 Special Devices, Incorporated Safe-arm initiator

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2388691A (en) * 1942-08-06 1945-11-13 John J Horan Fuse
US2853011A (en) * 1953-03-27 1958-09-23 Albert S Will Fuze
US2912933A (en) * 1944-01-24 1959-11-17 Rabinow Jacob Safety device
US3004491A (en) * 1960-07-26 1961-10-17 Eugene W Place Arming device
GB909549A (en) * 1959-11-02 1962-10-31 Energa Ammunition fuzes

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511872A (en) * 1950-06-20 Electric fuse
US2486362A (en) * 1946-11-07 1949-10-25 Us Sec War Acceleration switch
FR1137814A (fr) * 1955-09-29 1957-06-04 Soc Tech De Rech Ind Dispositif de sécurité pour amorçage de projectiles
FR1206026A (fr) * 1958-04-30 1960-02-05 Sofranic Procédé et installation pour le contrôle de l'allumage des charges explosives de projectiles
NL124444C (xx) * 1960-07-21
NL267886A (xx) * 1961-06-02

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2388691A (en) * 1942-08-06 1945-11-13 John J Horan Fuse
US2912933A (en) * 1944-01-24 1959-11-17 Rabinow Jacob Safety device
US2853011A (en) * 1953-03-27 1958-09-23 Albert S Will Fuze
GB909549A (en) * 1959-11-02 1962-10-31 Energa Ammunition fuzes
US3004491A (en) * 1960-07-26 1961-10-17 Eugene W Place Arming device

Also Published As

Publication number Publication date
NL6411175A (xx) 1965-03-31
GB1026224A (en) 1966-04-14
BE652467A (xx) 1964-12-16
BE637973A (xx) 1964-01-16
CH414403A (fr) 1966-05-31
FR1408558A (fr) 1965-08-13
IL22135A (en) 1968-06-20
DE1276510B (de) 1968-08-29

Similar Documents

Publication Publication Date Title
US3952660A (en) Fuze safing and arming device utilizing propellant ionization
US2545474A (en) Delayed detonating means for projectiles
CA2161221C (en) Self-destruct fuse for improved conventional munitions
GB376128A (en) Electric time or impact fuses for projectiles and the like
GB1021249A (en) A relay for rocket weapons
US3308761A (en) Electric fuses for projectiles
US2485887A (en) Projectile
US2892411A (en) Crystal point detonation fuze
US2458464A (en) Switch
GB1360305A (en) Tripping device for firing at least one electric primer by means of a remotely located pyrotechnic composition
US2889777A (en) Electrical arming mechanism for fuses
US3269315A (en) Explosive primer
US3618527A (en) Safety and arming device
US2972306A (en) Impact responsive electric primer
US2880672A (en) Electric fuze
US3119335A (en) Projectiles fitted with and electric detonator operated by a generator of the inertia type
GB1389360A (en) Electrical projectile fuse with switch means
GB751579A (en) Electric fuze for artillery projectiles
US2943572A (en) Fuze
GB574132A (en) Improvements in or relating to military land mines
US3372642A (en) Internal firing switch means for electrically fuzed projectiles
US3356026A (en) Piezoelectric igniter for projectiles
US3128705A (en) Electric fuse for rocket
SU499839A3 (ru) Электрическа машинка дл подрыва капсюлей-детонаторов мин
US3295449A (en) Electrical fuses for projectile or the like