US2853007A - Combined priming and ignition tube for firing ordnance or explosives - Google Patents

Combined priming and ignition tube for firing ordnance or explosives Download PDF

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Publication number
US2853007A
US2853007A US469512A US46951254A US2853007A US 2853007 A US2853007 A US 2853007A US 469512 A US469512 A US 469512A US 46951254 A US46951254 A US 46951254A US 2853007 A US2853007 A US 2853007A
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United States
Prior art keywords
priming
firing
tube
explosives
ignition tube
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Expired - Lifetime
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US469512A
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English (en)
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Casati Gianni Verga
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0823—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition
    • F42C19/0826—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition comprising an elongated perforated tube, i.e. flame tube, for the transmission of the initial energy to the propellant charge, e.g. used for artillery shells and kinetic energy penetrators
    • 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
    • F42C15/22—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 using centrifugal force
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0807—Primers; Detonators characterised by the particular configuration of the transmission channels from the priming energy source to the charge to be ignited, e.g. multiple channels, nozzles, diaphragms or filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0823—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition
    • F42C19/083—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition characterised by the shape and configuration of the base element embedded in the cartridge bottom, e.g. the housing for the squib or percussion cap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C7/00—Fuzes actuated by application of a predetermined mechanical force, e.g. tension, torsion, pressure
    • F42C7/12—Percussion fuzes of the double-action type, i.e. fuzes cocked and fired in a single movement, e.g. by pulling an incorporated percussion pin or hammer

Definitions

  • the present invention relates to a combined priming device and ignition tube suitable for the percussion firing of artillery cartridges 'and any other firing or explosive means such as bombs, mines, fuses and the like.
  • the said device is characterized by the fact that the primer, which can be inserted by screwing or forcing, if desired in a detachable way, into a primer body connected to an ignition bushing to form the firing tube, comprises at least four elements, i. e. percussion cap, cap holder, striker and head, detachably interconnected.
  • the firing tube according to this invention has the advantage of being able to be provided with the priming device after insertion into the shell of the supporting body preferably with the ignition tube already in place, and after the shell has already been charged.
  • the priming device can very well operate with low priced current series priming caps, whilst the firing tubes used up to now require the employment of special priming caps of difficult manufacture, charged with very sensitive explosives.
  • a safety device can be combined with the priming device, said safety device being apt to prevent the accidental operation of the priming device in case of shocks or falls thereof, and 'being preferably constituted by a ball housed within a hole in the head of the priming device in an annular groove of the striker into which said ball is pushed by suitable spring means.
  • Fig. l is a schematic axial section of a firing tube
  • Figs. 2 to 6 are axial sections of modifications of the priming device.
  • the device comprises a support body 1 provided in the represented example with an outside thread 2 for its application by screwing into the shell or the like and an ignition tube 3 which can be fixed to the body 1 also by screwing until it abuts a bored partition 4 integral with or screwed into it.
  • the body 1 has the seat for a priming device 5 which can be fastened in the body 1 by screwing and -successive caulking 6 in correspondence to the outer periphery border of the device.
  • the body 1 is preferably made of brass or other suitable metal and the partition 4 has a hole 7 for the passage of the flame generated in :the priming cap at the moment of the explosion produced in the ignition tube 3, in which the end looking towards the partition 4 is open and possibly provided with a plug 3 with a center hole 3", said tube being closed at the opposite end, for instance by means of a plug 8.
  • said tube 3 which can be made of brass, plastics, impregnated paper or other suitable material, is provided with a series of cross holes 8'.
  • the priming device indicated as a whole in Figs. 2 to 6, comprises a head 9 and a priming cap holder 10, of which Figs. 2, 3 and 4 show an assembly arrangement with reciprocal fitting of the priming cap holder and of the head 9 and Fig. 5 shows another arrangement with the head inserted in the cap holder, and Fig. 6 represents another arrangement with the cap holder inserted in the head.
  • the explosive element is constituted by a priming device 11
  • the flame comes out through holes 12 at the top of the priming device.
  • the explosive element is a cap 13
  • the flame comes out through holes 12, which are made in the priming cap holder.
  • the striker 14 Inside the head 9 is freely housed the striker 14, the safety device of which consists in a ball 15 partially engaged in an annular groove 16 of said striker and housed in a hole 17 of the head 9, within which is also arranged a spring 18 tending to keep the ball 15 in said groove.
  • the priming device is made water proof by means of varnishing at the flame hole end.
  • the connection between the striker 14 and the head 9 is sealed with a slightly adhesive, water repellent and inalterable time and climate proof material.
  • the support body 1 could be made at the outside so as to be applied by a forcing fit instead than by screwing into the shell or the like, and could be integral with the ignition tube, or the latter could be fixed therein as well as the priming device, by means of a force fit.
  • the priming device is shown as made for this force fit system of mounting.
  • the combined priming device and ignition tube of the invention distinguishes itself by a simple construction that makes easy the manufacture thereof and by the following essential advantages that can be achieved by its user A surely centered quick and efficacious percussion, thanks to the auxiliary striker;
  • Possibility of adjusting at will, by a suitable choice of the spring means acting upon the striker, the sensitivity and safety of the percussion;
  • a primer percussion device for a cartridge comprising a cylindrical support body, said support body defining first and second cylindrical receptacles, a partition in said support body separating the receptacles and provided with an aperture connecting the receptacles, an ignition tube detachably positioned in said first receptacle, a plug in said ignition tube adiecent' said support body and having 7 References Cited in the tile of this 3mm UNITED STATES PATENTS Bayliss Mar. 26, I889 Brubaker May 1, 1906 r Rushmore Mar. 18, 1919 Turnbull Apr. 15, 1952 V FOREIGN PATENTS Germany Apr. 2 2, 1920 Switzerland June 17, 1940

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
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US469512A 1953-11-19 1954-11-17 Combined priming and ignition tube for firing ordnance or explosives Expired - Lifetime US2853007A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT328117X 1953-11-19

Publications (1)

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US2853007A true US2853007A (en) 1958-09-23

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CH (1) CH328117A (it)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3011441A (en) * 1958-09-11 1961-12-05 Ici Ltd Igniter device
US3015277A (en) * 1957-05-20 1962-01-02 Junghans Helmut Percussion fuzes
US3119334A (en) * 1959-11-24 1964-01-28 Rinker Fa R Detonator
US3182595A (en) * 1962-07-20 1965-05-11 Harry F Hassmann Igniter assembly containing strands of benite
FR2322351A1 (fr) * 1975-08-23 1977-03-25 Dynamit Nobel Ag Munition d'exercice pour mortier
EP0022262A1 (en) * 1979-07-04 1981-01-14 Berfi S.P.A. Explosive priming device
US4495866A (en) * 1981-12-28 1985-01-29 Dynamit Nobel Aktiengesellschaft Flash guide tube arrangement for propellant charge igniters
US6672215B2 (en) * 2001-10-17 2004-01-06 Textron Systems Corporation Constant output high-precision microcapillary pyrotechnic initiator

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE288654C (it) *
US400165A (en) * 1889-03-26 Peimee foe caeteidges
US819634A (en) * 1905-07-27 1906-05-01 Oliver E J Brubaker Fixed ammunition.
US1297499A (en) * 1918-06-15 1919-03-18 Samuel W Rushmore Explosive shell.
CH209185A (fr) * 1938-02-26 1940-03-31 Emile Remondy Leon Fusée percutante, à percuteur dissociable, extrêmement sensible.
US2592623A (en) * 1948-02-16 1952-04-15 Norman K Turnbull Primer assembly for artillery ammunition

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE288654C (it) *
US400165A (en) * 1889-03-26 Peimee foe caeteidges
US819634A (en) * 1905-07-27 1906-05-01 Oliver E J Brubaker Fixed ammunition.
US1297499A (en) * 1918-06-15 1919-03-18 Samuel W Rushmore Explosive shell.
CH209185A (fr) * 1938-02-26 1940-03-31 Emile Remondy Leon Fusée percutante, à percuteur dissociable, extrêmement sensible.
US2592623A (en) * 1948-02-16 1952-04-15 Norman K Turnbull Primer assembly for artillery ammunition

Cited By (10)

* 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
US3011441A (en) * 1958-09-11 1961-12-05 Ici Ltd Igniter device
US3119334A (en) * 1959-11-24 1964-01-28 Rinker Fa R Detonator
US3182595A (en) * 1962-07-20 1965-05-11 Harry F Hassmann Igniter assembly containing strands of benite
FR2322351A1 (fr) * 1975-08-23 1977-03-25 Dynamit Nobel Ag Munition d'exercice pour mortier
US4098190A (en) * 1975-08-23 1978-07-04 Dynamit Nobel Aktiengesellschaft Training ammunition for mortars
EP0022262A1 (en) * 1979-07-04 1981-01-14 Berfi S.P.A. Explosive priming device
US4365555A (en) * 1979-07-04 1982-12-28 Berfi S.P.A. Explosive priming device
US4495866A (en) * 1981-12-28 1985-01-29 Dynamit Nobel Aktiengesellschaft Flash guide tube arrangement for propellant charge igniters
US6672215B2 (en) * 2001-10-17 2004-01-06 Textron Systems Corporation Constant output high-precision microcapillary pyrotechnic initiator

Also Published As

Publication number Publication date
CH328117A (it) 1958-02-28

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