US3613758A - Propagation primer - Google Patents

Propagation primer Download PDF

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Publication number
US3613758A
US3613758A US788435A US3613758DA US3613758A US 3613758 A US3613758 A US 3613758A US 788435 A US788435 A US 788435A US 3613758D A US3613758D A US 3613758DA US 3613758 A US3613758 A US 3613758A
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US
United States
Prior art keywords
percent
primer
propagation
charge
composition
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
US788435A
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English (en)
Inventor
Heinz Gawlick
Gunther Marondel
Hellmut Bendler
Werner Siegelin
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Dynamit Nobel AG
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Dynamit Nobel AG
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Filing date
Publication date
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
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Publication of US3613758A publication Critical patent/US3613758A/en
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    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
    • C06C5/00—Fuses, e.g. fuse cords
    • C06C5/06—Fuse igniting means; Fuse connectors
    • 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
    • F42C19/0803—Primers; Detonators characterised by the combination of per se known chemical composition in the priming substance
    • 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
    • F42C19/0815—Intermediate ignition capsules, i.e. self-contained primary pyrotechnic module transmitting the initial firing signal to the secondary explosive, e.g. using electric, radio frequency, optical or percussion signals to the secondary explosive

Definitions

  • composition is substantially insensitive to friction and shock.
  • additional specific primer compositions may be employed.
  • PATENTEDucT 19 I97l 3. 6 1 3 .7 58
  • This invention relates to a propagation primer. More particularly, it relates to propagation primers which are insensitive to friction and shock and which contain a primer charge of particular constituents and/or particular primer compositions.
  • primers For use in priming systems, particularly those of the military type, propagation or transmission primers are known having a primer composition containing up to about 60 percent by weight and more of an explosive. These primers, also called flash or flame primers, serve for the transfer or transmission of an ignition impulse, optionally with simultaneous boosting, over a more or less long distance.
  • the operation of such primers involves ignition on one side, called the igniting side, by a flame arriving at said side and then the emission by the primer itself of a flame on the other side, called the firing side, whereby a further ignition is triggered by means of the latter flar ne at a certain distance.
  • the provision can be made, for example, in the case of aircraft or missiles, to ignite a propagation primer by means of a conventional perforating, percussion or electrical primer provided at the head of the aircraft, the propagation primer then, in turn, emitting a flame and igniting, for example, through a tube or the like, a further detonation-triggering primer element disposed at a detonator, an explosive charge, or the like, provided in the center or also at the end of the aircraft.
  • a further detonation-triggering primer element disposed at a detonator, an explosive charge, or the like, provided in the center or also at the end of the aircraft.
  • the propagation primer In connection with propagation charges, the propagation primer must thus exhibit a shock and friction sensitivity which is lower than that of the propagation charge. Since compact bodies of tetryl (trinitrophenylmethylnitramine) or penthrite (pentaerythrite tetranitrate) are usually employed in the art as the propagation charge, there is hence the requirement for the propagation primers that the sensitivity to shock and friction be lower than that of the substances tetryl and penthrite.
  • One of the objects of the present invention is to provide a propagation primer having properties and advantages superior to those of the prior art.
  • Another object of the present invention is to provide a propagation primer which is extremely insensitive to friction and shock.
  • a further object of the invention is to provide primer charges and primer compositions which can be used advantageously in primers used for the transmission of an ignition impulse over a more or less long distance.
  • a still further object of the invention is to provide ad vantageous propagation primers which may be manufactured readily.
  • primer charge consisting essentially of, by weight, either approximately:
  • the first-mentioned primer charge composition a When accommodated in a metallic part dammed up toward the igniting side, or in a correspondingly constructed primer case or cup, the first-mentioned primer charge composition a satisfactorily ignites propellant charges, as well as pyrotechnical mixtures, over short distances. If propagation is to be executed over larger distances, then the first-mentioned primer charge mixture 0 is suitably maintained as the initial igniting composition, but as the propagation charge, there is employed one of the two additionally mentioned primer charge mixtures b, or b, depending on the particular requirements involved. The addition of boron mentioned in connection with the primer charge composition b, is employed for reinforcing the initial ignition.
  • the primer composition b is suitable. In the latter case, it may well be advisable, although it is not always necessary, to employ in conjunction with this primer charge composition also the primer charge composition a.
  • the same requirements and considerations are applicable as in the utilization of a composition mixture which is free of explosives.
  • All primer composition mixtures wherein the individual components are employed in quantities ranging within the above-stated limits are substantially less sensitive against shock and friction than the conventional primer charges, and they are also less sensitive than tetryl and penthrite.
  • the shock sensitivity thereof is between 0.6 and 1.5 mkp. (meters'kilopond), depending uponthe ratios in which the individual composition components are employed within the above-mentioned permissible limits.
  • the friction sensitivity of all the compositions in accordance with the present invention is above 30 kp. load, as measured in the friction apparatus according to Rathsburg.
  • FIG. 1 shows a primer with an igniting charge and a subsequent firing element
  • FIG. 2 shows a primer having a booster charge interposed
  • FIG. 3 shows a schematic view of an ignition chain or sequence.
  • the igniting composition 3 and the firing charge 4 are disposed one behind the other in the primer case I, which latter is open on both ends and is made of, for example, a metal such as brass.
  • the firing charge is covered by a thick foil or the like.
  • the opening in the primer case on the igniting side is provided with the funnel-shaped widened section 2.
  • a flame arriving in the direction of the upper arrow ignites the igniting charge 3 which, in turn, ignites the igniting charge 3 which, in turn, ignites the firing charge 4 and sends, after destroying the cover, an igniting flame in the direction of the lower arrow.
  • the booster charge 5 is disposed in the primer case 1, provided with an annular flange, between the igniting charge 3 and the firing charge 4.
  • the firing charge is again covered by a foil or the like, and the opening on the ig niting side is again provided with the funnellike widened section 2.
  • the propagation primer provided for bridging a distance of, for example, more than 200 mm., is again ignited by a flame arriving at the igniting side.
  • the igniting charge 3 then ignites the booster charge 5, and the latter ignites the firing charge 4, with a simultaneous reinforcement of the ignition jet being sent out by the firing charge.
  • the booster charge, shielded by the igniting charge 3, the firing charge 4 and the case 1 can, in this embodiment, be provided with an explosive without incurring any disadvantages.
  • the primer element 7 is provided in the igniter (detonator) 6, which primer element can be, for example, a conventional perforation (pin-actuated) primer or a percussion primer or, also, a likewise known electrical primer.
  • this primer element ignites, by means of its ignition flame sent out in the direction of the arrow, the propagation primer 9a disposed at the upper end of the tube 8 and provided with the primer composition of the present invention.
  • the propagation primer 9a effects the ignition of the identical propagation primer 9b disposed in the center of the tube.
  • the ignition is propagated from the latter primer 9b to the propagation primer 90 provided at the lower end of the tube, which primer is likewise identical with the primers 9a and 9b.
  • This ignition chain can be made as long as desired.
  • the spacing between the propagation primers depends, of course, on the particular primer charge employed.
  • a primer element which, in turn, ignites an explosive charge or the like.
  • compositions include, for example, a propagation system containing a primer charge b disposed on the firing side and comprising:
  • a propagation primer, composition substantially insensitive to friction and shock comprising, by weight, approximatel y 40-60 percent of barium nitrate 10-20 percent of an aluminum-magnesium alloy 5-20 percent of lead dioxide 6-10 percent of zirconium hydride, and
  • a propagation primer composition substantially insensitive to friction and shock comprising a first primer charge having a composition comprising, by weight, approximately:
  • a propagation primer composition substantially insensitive to friction and shock comprising a first primer charge having a composition comprising, by weight, approximately:
  • a propagation primer composition substantially insensitive to friction and shock comprising a first primer charge having a composition comprising, by weight, approximately:
  • a propagation primer composition substantially insensitive to friction and shock comprising a first primer charge having a composition comprising, by weight, approximately:
  • a propagation primer composition substantially insensitive to friction and shock comprising, by weight, approximately:
  • a propagation primer composition substantially insensitive to friction and shock comprising, by weight, approximately:
  • a propagation primer composition substantially insensitive to friction and shock consisting of, by weight, approximately:

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Air Bags (AREA)
  • Mechanical Operated Clutches (AREA)
  • Adhesives Or Adhesive Processes (AREA)
US788435A 1968-01-13 1969-01-02 Propagation primer Expired - Lifetime US3613758A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1646350A DE1646350C3 (de) 1968-01-13 1968-01-13 Reib- und schlagunempfindliches Übertragungszündhütchen

Publications (1)

Publication Number Publication Date
US3613758A true US3613758A (en) 1971-10-19

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Application Number Title Priority Date Filing Date
US788435A Expired - Lifetime US3613758A (en) 1968-01-13 1969-01-02 Propagation primer

Country Status (8)

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US (1) US3613758A (en))
AT (2) AT287557B (en))
BE (1) BE726679A (en))
DE (1) DE1646350C3 (en))
FR (1) FR1599961A (en))
GB (1) GB1246409A (en))
NL (1) NL6817605A (en))
NO (1) NO119402B (en))

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4691633A (en) * 1985-06-06 1987-09-08 Societe Nationale Des Poudres Et Explosifs Igniter intended for gas-generating charges in shells
US5741999A (en) * 1995-06-22 1998-04-21 Kazumi; Takashi Gas generating agent composition
US6086693A (en) * 1999-02-02 2000-07-11 Autoliv Asp, Inc. Low particulate igniter composition for a gas generant
FR2863352A1 (fr) * 2003-12-03 2005-06-10 Armement Et D Etudes Alsetex S Dispositif de propulsion d'une grenade anti-emeutes
US20060139748A1 (en) * 2004-12-14 2006-06-29 Ahn Seong D Color electrophoretic display and method of manufacturing the same
US20080060541A1 (en) * 2006-08-29 2008-03-13 Daicel Chemical Industries, Ltd. Electric igniter and method of manufacturing same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2438821A1 (fr) * 1978-10-13 1980-05-09 France Etat Dispositif d'allumage a fil chaud de securite
RU2168488C2 (ru) * 1998-08-04 2001-06-10 Открытое акционерное общество Новосибирский завод низковольтной аппаратуры Зажигательный состав для пуль патронов стрелкового оружия

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2038097A (en) * 1931-07-01 1936-04-21 Remington Arms Co Inc Priming mixture
US3238076A (en) * 1963-01-07 1966-03-01 Taylor George William Charles Process for primary explosives containing boron having reduced electrostatic sensitivity
US3257801A (en) * 1962-07-09 1966-06-28 North American Aviation Inc Pyrotechnic composition comprising solid oxidizer, boron and aluminum additive and binder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2038097A (en) * 1931-07-01 1936-04-21 Remington Arms Co Inc Priming mixture
US3257801A (en) * 1962-07-09 1966-06-28 North American Aviation Inc Pyrotechnic composition comprising solid oxidizer, boron and aluminum additive and binder
US3238076A (en) * 1963-01-07 1966-03-01 Taylor George William Charles Process for primary explosives containing boron having reduced electrostatic sensitivity

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4691633A (en) * 1985-06-06 1987-09-08 Societe Nationale Des Poudres Et Explosifs Igniter intended for gas-generating charges in shells
US5741999A (en) * 1995-06-22 1998-04-21 Kazumi; Takashi Gas generating agent composition
US6086693A (en) * 1999-02-02 2000-07-11 Autoliv Asp, Inc. Low particulate igniter composition for a gas generant
FR2863352A1 (fr) * 2003-12-03 2005-06-10 Armement Et D Etudes Alsetex S Dispositif de propulsion d'une grenade anti-emeutes
US20060139748A1 (en) * 2004-12-14 2006-06-29 Ahn Seong D Color electrophoretic display and method of manufacturing the same
US7564615B2 (en) * 2004-12-14 2009-07-21 Electronics And Telecommunications Research Institute Color electrophoretic display
US20080060541A1 (en) * 2006-08-29 2008-03-13 Daicel Chemical Industries, Ltd. Electric igniter and method of manufacturing same

Also Published As

Publication number Publication date
AT288939B (de) 1971-03-25
DE1646350B2 (de) 1973-08-16
BE726679A (en)) 1969-06-16
NO119402B (en)) 1970-05-11
FR1599961A (en)) 1970-07-20
NL6817605A (en)) 1969-07-15
AT287557B (de) 1971-01-25
GB1246409A (en) 1971-09-15
DE1646350A1 (de) 1971-08-05
DE1646350C3 (de) 1974-04-18

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