US3911825A - Caseless formed propellant powder charge - Google Patents

Caseless formed propellant powder charge Download PDF

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Publication number
US3911825A
US3911825A US445896A US44589674A US3911825A US 3911825 A US3911825 A US 3911825A US 445896 A US445896 A US 445896A US 44589674 A US44589674 A US 44589674A US 3911825 A US3911825 A US 3911825A
Authority
US
United States
Prior art keywords
charge
propellant
percussion
shaped
primer
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
US445896A
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English (en)
Inventor
Heinz Gawlick
Guenther Marondel
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.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
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
Priority to DE2035851A priority Critical patent/DE2035851C3/de
Priority to CH1031571A priority patent/CH554819A/xx
Priority to BE770047A priority patent/BE770047A/xx
Priority to FR7126058A priority patent/FR2101788A5/fr
Priority to CA118,474A priority patent/CA968629A/en
Priority to GB3363871A priority patent/GB1343524A/en
Priority to NL7109835A priority patent/NL7109835A/xx
Priority to AT619571A priority patent/AT304338B/de
Priority to AU31403/71A priority patent/AU463785B2/en
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
Priority to US445896A priority patent/US3911825A/en
Priority to US05/580,357 priority patent/US4014963A/en
Application granted granted Critical
Publication of US3911825A publication Critical patent/US3911825A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/16—Cartridges specially adapted for impact tools; Cartridge and bolts units
    • B25C1/163—Cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/16—Cartridges specially adapted for impact tools; Cartridge and bolts units
    • B25C1/166—Pellets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/16—Cartridges, i.e. cases with charge and missile characterised by composition or physical dimensions or form of propellant charge, with or without projectile, or powder
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S102/00—Ammunition and explosives
    • Y10S102/70—Combustilbe cartridge

Definitions

  • propellant powder charge is provided with a preferably central continuous recess or hole in which a primer charge including impact ignitable powder, such as, for example, tetrazene or tetrazene tricinate is accommodated.
  • a primer charge including impact ignitable powder such as, for example, tetrazene or tetrazene tricinate is accommodated.
  • These formed propellant powder charges constitute caseless propellant cartridges which burn without leaving any residue for commercial and industrial apparatus not employing a projectile for driving studs and the like.
  • Such cartridges are ignited in substantially closed combustion chambers of the type disclosed in US. Pat. No. 3,283,657 to Kvavle, issued Nov. 8, 1966 in which the gases evolving from the deflagration of the cartridge are utilized to operate the device or tool.
  • the formed propellant powder charge can exhibit varying sizes and varying shapes, e.g., annular or polygonal, depending on the purpose for which it is employed.
  • the central recesses of the shaped charges always exhibit the same diameter.
  • this is accomplished in a shaped propellant powder charge having a central recess by forming the percussion-sensitive powder charge contained therein as a molded article, with an H-shaped cross section.
  • the legs of the H-shaped profile are fashioned to correspond to the height of the shaped charge.
  • the percussion or impact-sensitive primer charge is compressed more densely in the'zone of the central web than in the zone of the two legs of the I-I-shaped profile.
  • the more strongly compressed central web serves solely for igniting the primer charge by percussion, whereas the less compressed legs serve for transmitting the ignition flame from the central web to the adjoining shaped propellantpowder charge.
  • the height of the central web can also be altered. By the varying the height of the central web, the desired or required sensitivity limit can be set for the primer charge of percussion-sensitive powder pressed in an I-I-profile.
  • the percussion-sensitive powder or primer charge is introduced into the central recess, core or opening of the shaped propellant powder charge in the moist or dry state.
  • a die having a smaller diameter than the recess the primer charge in the central zone is compressed to form the central web.
  • the superfluous primer charge is distributed toward the margin on all sides until it reaches the upper and/or lower edge of the shaped propellant powder charge. At this point, the primer charge is prevented from being pressed further outwardly beyond the edges of the shaped propellant charge by means of an appropriate tool.
  • FIG. 1 shows a cross section of a caseless formed propellant powder charge
  • FIG. 2 is a top view of the formed propellant powder charge of FIG. 1;
  • FIG. 3 is a top view of a modified formed propellant powder charge.
  • shaped propellant charge 1 which may be shaped by casting or compressed from porous powder, and preferably comprises single-base .or double-base nitrocellulose powders, is formed with continuous central recess 3 having diameter 6.
  • the external shape of shaped propellant powder charge 1 can be varied in a multitude of ways, e.g., the annularcylindrical configuration of FIG. 2, the octagonal ring of FIG. 3, etc.
  • Primer charge 2 of a percussion-sensitive mixture such as tetrazene and nitrocellulose, is accommodated in recess 3.
  • the percussion-sensitive mixture is then compressed into a shaped article having I-l-shaped cross section profile with central web 2a and legs 2b.
  • the ends of legs 2b are'flush, in each case, with the upper and lower edge, respectively, of shaped propellant powder charge 1.
  • Height 4 and length or diameter 6 of central web 2a can be varied as desired. In other words, the sensitivity limit of the primer charge can be set with the aid of the height 4.
  • a primer charge of a commercially available primer composition made into a paste with nitrocellulose and having a compression of about 50 kp/cm to 500 kp/cm depending on the moisture of the composition, one obtains, for example, at a height of the web of 1.2 mm., a sensitivity limit of about 70 cm'kp and at a height of the web of 1.3 mm., a limit of about 80 cm'kp.
  • a uniform quality of the H-shaped primer charge is insured, for instance, by the following manufacturing method.
  • the pressing dies, not shown, have diameter 5 which is smaller than diameter 6 of the recess.
  • central web 2a receives a specific compression and height which is reproducible as many times as desired by this process, whereas the excess amounts, which can also be distributed non-uniformly in quantity, are displaced into the lateral space of recess 3 forming legs 2b of the H- shaped profile.
  • the height of central web 2a can be manufactured, for example, at a tolerance of 111.2 mm., and the sensitivity limit, fixed in a correspondingly accurate fashion.
  • a caseless propellant charge for commercial apparatus not employing a projectile for driving studs and the like comprising a shaped propellant powder charge defining a hole of a given width extending therethrough, and a percussion-sensitive primer ignitor charge of substantially the same width as 'said defined hole and secured therein, said percussion-sensitive primer ignitor charge having an H-shaped cross section taken parallel to the axis of said hole with two substantially parallel legs extending in the axial direction of said hole and a transversely extending web interconnecting said two legs at points intermediate the end of said legs.
  • said percussion-sensitive primer charge includes a compound selected from the group consisting essentially of tetrazene and tetrazene tricinate.
  • the propellant charge of claim 1 wherein the primer-ignitor charge has a percussion-sensitivity of about -80 cm-kp at the web thereof and the remaining portions of the propellant charge have a higher percussion-sensitivity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
US445896A 1970-07-18 1974-02-26 Caseless formed propellant powder charge Expired - Lifetime US3911825A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
DE2035851A DE2035851C3 (de) 1970-07-18 1970-07-18 Treibladungs-Pulverkörper und Verfahren zu seiner Herstellung
CH1031571A CH554819A (de) 1970-07-18 1971-07-13 Treibladungs-pulverkoerper, insbesondere fuer nicht-militaerische geraete.
BE770047A BE770047A (fr) 1970-07-18 1971-07-15 Corps de poudre de charges propulsives, en particulier pour appareils ausage industriel; (
CA118,474A CA968629A (en) 1970-07-18 1971-07-16 Caseless formed propellant powder charge
GB3363871A GB1343524A (en) 1970-07-18 1971-07-16 Caseless propellent cartridges
NL7109835A NL7109835A (enrdf_load_stackoverflow) 1970-07-18 1971-07-16
FR7126058A FR2101788A5 (enrdf_load_stackoverflow) 1970-07-18 1971-07-16
AT619571A AT304338B (de) 1970-07-18 1971-07-16 Treibladungs-Pulverkörper, insbesondere für den Antrieb von Geräten zur gewerblichen Nutzung
AU31403/71A AU463785B2 (en) 1970-07-18 1971-07-19 Improvements in or relating to caseless propellent cartridges
US445896A US3911825A (en) 1970-07-18 1974-02-26 Caseless formed propellant powder charge
US05/580,357 US4014963A (en) 1970-07-18 1975-05-23 Molding a primer charge within a caseless propellant charge

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2035851A DE2035851C3 (de) 1970-07-18 1970-07-18 Treibladungs-Pulverkörper und Verfahren zu seiner Herstellung
US16317371A 1971-07-16 1971-07-16
US445896A US3911825A (en) 1970-07-18 1974-02-26 Caseless formed propellant powder charge
US05/580,357 US4014963A (en) 1970-07-18 1975-05-23 Molding a primer charge within a caseless propellant charge

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US16317371A Continuation 1970-07-18 1971-07-16

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/580,357 Division US4014963A (en) 1970-07-18 1975-05-23 Molding a primer charge within a caseless propellant charge

Publications (1)

Publication Number Publication Date
US3911825A true US3911825A (en) 1975-10-14

Family

ID=27431106

Family Applications (2)

Application Number Title Priority Date Filing Date
US445896A Expired - Lifetime US3911825A (en) 1970-07-18 1974-02-26 Caseless formed propellant powder charge
US05/580,357 Expired - Lifetime US4014963A (en) 1970-07-18 1975-05-23 Molding a primer charge within a caseless propellant charge

Family Applications After (1)

Application Number Title Priority Date Filing Date
US05/580,357 Expired - Lifetime US4014963A (en) 1970-07-18 1975-05-23 Molding a primer charge within a caseless propellant charge

Country Status (10)

Country Link
US (2) US3911825A (enrdf_load_stackoverflow)
AT (1) AT304338B (enrdf_load_stackoverflow)
AU (1) AU463785B2 (enrdf_load_stackoverflow)
BE (1) BE770047A (enrdf_load_stackoverflow)
CA (1) CA968629A (enrdf_load_stackoverflow)
CH (1) CH554819A (enrdf_load_stackoverflow)
DE (1) DE2035851C3 (enrdf_load_stackoverflow)
FR (1) FR2101788A5 (enrdf_load_stackoverflow)
GB (1) GB1343524A (enrdf_load_stackoverflow)
NL (1) NL7109835A (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023996A (en) * 1973-08-09 1977-05-17 Societe Nationale Des Poudres Et Explosifs Moldable compositions comprising polyvinyl nitrate
US4593622A (en) * 1983-09-23 1986-06-10 Dynamit Nobel Aktiengesellschaft Industrial cartridge with separated deflagrating components
US4710329A (en) * 1978-09-12 1987-12-01 Basset Bretagne Loire - B.B.L. Method of manufacturing articles of compacted powder
US5208420A (en) * 1992-03-13 1993-05-04 Hamilton Brian K Propellant strip assembly
US5216200A (en) * 1990-12-07 1993-06-01 Dynamit Nobel Aktiengesellschaft Device for igniting a propellant charge, a cartridge for the charge and a magazine for holding cartridges, especially for stud setting or driving tools
US5269224A (en) * 1990-08-30 1993-12-14 Olin Corporation Caseless utilized ammunition charge module
US5485790A (en) * 1993-05-28 1996-01-23 Oea, Inc. Gas generator with multiple-charge primer
US5684266A (en) * 1995-06-05 1997-11-04 Sencorp Propellant charge structure for generating gases to propel an object from a tool
WO1999036745A1 (en) 1998-01-13 1999-07-22 Senco Products. Inc. Propellant strip assembly and propellant charge structure
US20030192632A1 (en) * 2002-04-08 2003-10-16 Nelaev Victor Petrovich Method for production of nitrocellulose base for consolidated charges and consolidated propellant charge based thereon
US20120321413A1 (en) * 2010-02-12 2012-12-20 Fernando Masas Apparatus for installing fasteners and explosive loads for use therewith
US20130200601A1 (en) * 2010-10-29 2013-08-08 Trw Airbag Systems Gmbh Solid fuel body, gas generator, module having a gas generator, and pyrotechnic drive unit
CN104690690A (zh) * 2013-12-10 2015-06-10 崴钢工业有限公司 火药钉

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2411817A1 (fr) * 1977-12-15 1979-07-13 Poudres & Explosifs Ste Nale Chargement unitaire fragmentable de poudre propulsive, contenant un liant au nitrate de polyvinyle
DE2852358C2 (de) * 1978-12-04 1986-09-11 Dynamit Nobel Ag, 5210 Troisdorf Verfahren zur Herstellung von gepreßten Sprengkörpern für Munition oder Sprengladungen, insbesondere großen Kalibers
DE2852334A1 (de) * 1978-12-04 1980-06-26 Dynamit Nobel Ag Verfahren zur herstellung gepresster, insbesondere grosskalibriger sprengladungen
CA1109706A (en) * 1980-02-04 1981-09-29 Joseph R. Bonnycastle Explosive booster manufacture
DE3335821A1 (de) * 1983-10-01 1985-04-11 Rheinmetall GmbH, 4000 Düsseldorf Treibladung und verfahren zu ihrer herstellung
DE3415389A1 (de) * 1984-04-25 1985-11-07 Diehl GmbH & Co, 8500 Nürnberg Verfahren zum einbringen einer ladung in eine geschosshuelle
US4899919A (en) * 1988-04-01 1990-02-13 Clumb Thomas E Self energizing fastener system
CA2089832A1 (en) * 1992-03-13 1993-09-14 Brian K. Hamilton Apparatus and composition for propelling an object
US5773748A (en) * 1995-06-14 1998-06-30 Regents Of The University Of California Limited-life cartridge primers
RU2150659C1 (ru) * 1998-07-31 2000-06-10 Российский Федеральный Ядерный Центр-Всероссийский Научно-исследовательский Институт Экспериментальной Физики Способ формирования детонационной волны в заряде взрывчатого вещества
RU2138759C1 (ru) * 1998-07-31 1999-09-27 Российский Федеральный Ядерный Центр - Всероссийский Научно-Исследовательский Институт Экспериментальной Физики Шашка-детонатор
RU2337087C1 (ru) * 2007-01-25 2008-10-27 Федеральное государственное унитарное предприятие "Научно-исследовательский институт полимерных материалов" Способ изготовления заготовки заряда баллиститного твердого ракетного топлива и устройство для его осуществления
RU2338732C1 (ru) * 2007-02-19 2008-11-20 Федеральное государственное унитарное предприятие "Научно-исследовательский институт полимерных материалов" Способ изготовления элементов заряда баллиститного твердого ракетного топлива в виде тонкосводных трубок и устройство для его осуществления
DE102022108291A1 (de) * 2022-04-06 2023-10-12 Zf Airbag Germany Gmbh Gepresstes Treibstoffelement, Verfahren zu dessen Herstellung und Gasgenerator mit Treibstoffelement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3345945A (en) * 1965-08-03 1967-10-10 Joseph B Quinlan Uniformed density caseless cartridge
US3372643A (en) * 1966-02-01 1968-03-12 United Shoe Machinery Corp Low explosive primerless formed charges
US3580180A (en) * 1967-09-19 1971-05-25 Dynamit Nobel Ag Consumable industrial propellant cartridge
US3645207A (en) * 1969-05-06 1972-02-29 Trw Inc Combustible moistureproof percussion primer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3420137A (en) * 1967-08-18 1969-01-07 Olin Mathieson Contained compacted ammunition primer composition and method of preparation
US3485901A (en) * 1968-01-04 1969-12-23 Us Army Method for making a primer containing coated nitrocellulose granules
US3741122A (en) * 1968-08-27 1973-06-26 Remington Arms Co Inc Expendable shotshell
DE1805359A1 (de) * 1968-10-26 1970-05-27 Dynamit Nobel Ag Treibsatz fuer Geraete zur gewerblichen Nutzung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3345945A (en) * 1965-08-03 1967-10-10 Joseph B Quinlan Uniformed density caseless cartridge
US3372643A (en) * 1966-02-01 1968-03-12 United Shoe Machinery Corp Low explosive primerless formed charges
US3580180A (en) * 1967-09-19 1971-05-25 Dynamit Nobel Ag Consumable industrial propellant cartridge
US3645207A (en) * 1969-05-06 1972-02-29 Trw Inc Combustible moistureproof percussion primer

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023996A (en) * 1973-08-09 1977-05-17 Societe Nationale Des Poudres Et Explosifs Moldable compositions comprising polyvinyl nitrate
US4710329A (en) * 1978-09-12 1987-12-01 Basset Bretagne Loire - B.B.L. Method of manufacturing articles of compacted powder
US4593622A (en) * 1983-09-23 1986-06-10 Dynamit Nobel Aktiengesellschaft Industrial cartridge with separated deflagrating components
US5269224A (en) * 1990-08-30 1993-12-14 Olin Corporation Caseless utilized ammunition charge module
US5216200A (en) * 1990-12-07 1993-06-01 Dynamit Nobel Aktiengesellschaft Device for igniting a propellant charge, a cartridge for the charge and a magazine for holding cartridges, especially for stud setting or driving tools
US5208420A (en) * 1992-03-13 1993-05-04 Hamilton Brian K Propellant strip assembly
US5485790A (en) * 1993-05-28 1996-01-23 Oea, Inc. Gas generator with multiple-charge primer
US5684266A (en) * 1995-06-05 1997-11-04 Sencorp Propellant charge structure for generating gases to propel an object from a tool
WO1999036745A1 (en) 1998-01-13 1999-07-22 Senco Products. Inc. Propellant strip assembly and propellant charge structure
US6053108A (en) * 1998-01-13 2000-04-25 Senco Products, Inc. Propellant strip assembly and propellant charge structure
US20030192632A1 (en) * 2002-04-08 2003-10-16 Nelaev Victor Petrovich Method for production of nitrocellulose base for consolidated charges and consolidated propellant charge based thereon
US20120321413A1 (en) * 2010-02-12 2012-12-20 Fernando Masas Apparatus for installing fasteners and explosive loads for use therewith
US20130200601A1 (en) * 2010-10-29 2013-08-08 Trw Airbag Systems Gmbh Solid fuel body, gas generator, module having a gas generator, and pyrotechnic drive unit
US10501386B2 (en) * 2010-10-29 2019-12-10 Trw Airbag Systems Gmbh Solid fuel body, gas generator, module having a gas generator, and pyrotechnic drive unit
CN104690690A (zh) * 2013-12-10 2015-06-10 崴钢工业有限公司 火药钉

Also Published As

Publication number Publication date
DE2035851C3 (de) 1979-03-15
US4014963A (en) 1977-03-29
NL7109835A (enrdf_load_stackoverflow) 1972-01-20
CH554819A (de) 1974-10-15
DE2035851A1 (de) 1972-01-27
DE2035851B2 (de) 1978-06-29
FR2101788A5 (enrdf_load_stackoverflow) 1972-03-31
GB1343524A (en) 1974-01-10
CA968629A (en) 1975-06-03
BE770047A (fr) 1971-11-16
AT304338B (de) 1972-12-27
AU463785B2 (en) 1975-08-07
AU3140371A (en) 1973-01-25

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