US3754510A - Propellant charge for devices used industrially - Google Patents

Propellant charge for devices used industrially Download PDF

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Publication number
US3754510A
US3754510A US00872809A US3754510DA US3754510A US 3754510 A US3754510 A US 3754510A US 00872809 A US00872809 A US 00872809A US 3754510D A US3754510D A US 3754510DA US 3754510 A US3754510 A US 3754510A
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US
United States
Prior art keywords
propellant
propellant charge
charge
recess
primer substance
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
US00872809A
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English (en)
Inventor
G Marondel
H Gawlick
W Siegelin
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
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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 US3754510A publication Critical patent/US3754510A/en
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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
    • B25C1/082—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a pellet
    • 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
    • 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 CHARGE FOR DEVICES USED INDUSTRIALLY Inventors: Giinther Marondel, Eriere;
  • the present invention relates to a caseless propellant charge for devices used industrially for example, stud driving tools.
  • a body of propellant powder having preferably a central recess extending therethrough is provided with a percussion-sensitive primer mass disposed in said recess.
  • caseless propellant charges wherein, in the zone of a preferably central recess of a formed or cast body made of a suitable propellant powder, a precussion-ignitable powder charge is provided.
  • a necessary prerequisite is a device with a specific construction, namely a device wherein the receptacle, housing the propellant charge, and the firing or striker pin are of such a structure, or cooperate with each other in such a manner, that the primer substance by itself is compressed or compacted between the striker pin and a solid (fixed) abutment.
  • the compression extends beyond that corresponding to the axial compression of the propellant charge by the percussion energy customary in this kind of device.
  • the primer subs ance in addition to the compression of the entire propellant charge effected by the percussion energy customary in the device, is also subjected toan additional compression or compacting, leading'up to and exceeding the value required for the ignition and thus resulting in ignition.
  • the recess of the propellant powder body is completely filled with the primer substance.
  • the complete filling of the recess of the propellant powder body with the primer substance is also advantageous insofar as it ensures, without any special measures, that the primer substance is always disposed in an even and uniform level over the entire cross section of the recess, even in the case of a very loose compaction, independent of the respective position of the propellant charge. Accordingly, the same conditions are created for ignition of the propellant charge over the entire cross section.
  • the minimum value of axial compression necessary for triggering the ignition can be selected to be a high value. In the interest of as great a safety margin as possible,this value is chosen to be very high, for example, at least 80 percent.
  • Such a high degree of compression or a corresponding amount of compacting also produces the advantage that the mechanical abutment provided for the intended pure percussionignition is especially effective as an anvil, i.e., for utilizing the percussion energy for the ignition of the propellant charge.
  • Suitable for the percussion-sensitive primer substance are conventional materials or mixtures of said materials known for this purpose.
  • an intimate'mixture of tetrazene and nitrocellulose is preferably employed, which mixture can be varied or adjusted within very wide limits, by correspondingly dimensioning the percentage proportions of the two components, with respect to their percussion sensitivity.
  • the percussion sensitivity is preferably employed, which mixture can be varied or adjusted within very wide limits, by correspondingly dimensioning the percentage proportions of the two components, with respect to their percussion sensitivity.
  • the propellant which canbe used in the present invention includes for example, non-gelatinized nitrocellulose which can be pressed into a highly compacted propellant powder body.
  • the propellant powder body can also be made of a gelatinized propellant, for example gelatinized nitrocellulose, by the extrusion method; This has the advantageof being simple and inexpen' sive.
  • the propellant powder body can also be a porous or a non-porous propellant cemented with an organic binder which leaves no residue upon deflagration.
  • FIG. 1 shows a propellant charge in an axial, sectional view
  • FIG. 2 shows a device for igniting the propellant charge in the opened condition
  • FIG. 3 shows the device in the closed condition.
  • the propellant charge of FIG. 1 comprises the annular propellant powder body 1 which is cast or pressed (formed) from the propellant, or produced with the use of a conventional organic binder, for example an epoxy resin, which burns without leaving any residue.
  • the primer substance 2 completely fills the annular inside cross section.
  • the ratio of compressibility of propellant to primer substance is about 1:10 to l:l,000.
  • the primer substance upon a sudden axial compression of the propellant charge effected with the use of percussion energy which is customary when employing devices for industrial usage, for example when using stud driving tools, the primer substance experiences only a relatively minor compacting, which is not yet sufi'lcient for ignition. Therefore a further compacting of the primer substance is necessary.
  • the powder foil 9, covering at least the inside cross-section can be provided. It is also possible to varnish the end face with a suitable material which burns without leaving a residue.
  • Elements 3 and 4 of FIGS. 2 and 3 are parts of a stud driving tool which is not shown in detail, operating in accordance with the so-called thrust piston principle.
  • the recess 5, which serves as the support for the propellant charge is likewise adapted to the dimensions of the propellant charges being employed.
  • the cylindrical extention 7 of element 4 is dimensioned so that it is adapted to the dimensions of the propellant charges being employed, as well as to the dimensions of the recess 5. Accordingly, as seen in FIG.
  • the closed annular space 8 results, into which the propellant power bodyI-I of an inserted propellant charge is pressed whenat'h'e'zdevice is closed.
  • a caseless consumable propellant charge for industrial use which comprises a body of a propellant powder having a recess disposed through a substantial portion of said body, said recess being substantially filled with a percussion-sensitive primer substance, said primer substance having a compressibility greater than the compressibility of the body of said propellant powder whereby a sudden unexpected compression of the propellant charge in the direction of the axis of the recess, and the resultant compacting of the primer substance remains below that value of compression required for ignition thereof, the ratio of the compressibility of said propellant powder to said primer substance being about 1:10 to 121,000 and the compression value required for ignition is reached only after an axial compression of said primer substance of at least about percent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
US00872809A 1968-10-26 1969-10-31 Propellant charge for devices used industrially Expired - Lifetime US3754510A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681805359 DE1805359A1 (de) 1968-10-26 1968-10-26 Treibsatz fuer Geraete zur gewerblichen Nutzung

Publications (1)

Publication Number Publication Date
US3754510A true US3754510A (en) 1973-08-28

Family

ID=5711591

Family Applications (1)

Application Number Title Priority Date Filing Date
US00872809A Expired - Lifetime US3754510A (en) 1968-10-26 1969-10-31 Propellant charge for devices used industrially

Country Status (16)

Country Link
US (1) US3754510A (de)
JP (1) JPS4840000B1 (de)
AT (1) AT305169B (de)
BE (1) BE740681A (de)
CA (1) CA919432A (de)
DE (1) DE1805359A1 (de)
DK (1) DK125236B (de)
ES (1) ES372872A1 (de)
FI (1) FI50939C (de)
FR (1) FR2022313A1 (de)
GB (1) GB1293803A (de)
IL (1) IL33100A (de)
NL (1) NL6914487A (de)
NO (1) NO122738B (de)
PL (1) PL80569B1 (de)
RO (1) RO56417A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4014963A (en) * 1970-07-18 1977-03-29 Dynamit Nobel Aktiengesellschaft Molding a primer charge within a caseless propellant charge
US4710329A (en) * 1978-09-12 1987-12-01 Basset Bretagne Loire - B.B.L. Method of manufacturing articles of compacted powder
US5269224A (en) * 1990-08-30 1993-12-14 Olin Corporation Caseless utilized ammunition charge module
US5322660A (en) * 1990-04-23 1994-06-21 Miller Construction Limited Method of laminating glass
US5726378A (en) * 1996-04-01 1998-03-10 Hodgdon Powder Company, Inc. Unitary propellant charge for muzzle loading firearms
US6688232B2 (en) 2001-12-31 2004-02-10 Legend Products Corporation Compressed powder charge for muzzleloader and black powder firearms
US7344610B2 (en) 2003-01-28 2008-03-18 Hodgdon Powder Company, Inc. Sulfur-free propellant compositions

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3580180A (en) * 1967-09-19 1971-05-25 Dynamit Nobel Ag Consumable industrial propellant cartridge

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3580180A (en) * 1967-09-19 1971-05-25 Dynamit Nobel Ag Consumable industrial propellant cartridge

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4014963A (en) * 1970-07-18 1977-03-29 Dynamit Nobel Aktiengesellschaft Molding a primer charge within a caseless propellant charge
US4710329A (en) * 1978-09-12 1987-12-01 Basset Bretagne Loire - B.B.L. Method of manufacturing articles of compacted powder
US5322660A (en) * 1990-04-23 1994-06-21 Miller Construction Limited Method of laminating glass
US5269224A (en) * 1990-08-30 1993-12-14 Olin Corporation Caseless utilized ammunition charge module
US5726378A (en) * 1996-04-01 1998-03-10 Hodgdon Powder Company, Inc. Unitary propellant charge for muzzle loading firearms
US6688232B2 (en) 2001-12-31 2004-02-10 Legend Products Corporation Compressed powder charge for muzzleloader and black powder firearms
US7344610B2 (en) 2003-01-28 2008-03-18 Hodgdon Powder Company, Inc. Sulfur-free propellant compositions

Also Published As

Publication number Publication date
NO122738B (de) 1971-08-02
GB1293803A (en) 1972-10-25
DE1805359A1 (de) 1970-05-27
PL80569B1 (de) 1975-08-30
AT305169B (de) 1973-02-12
JPS4840000B1 (de) 1973-11-28
RO56417A (de) 1974-07-01
FI50939C (fi) 1976-09-10
FR2022313A1 (de) 1970-07-31
BE740681A (de) 1970-04-01
IL33100A0 (en) 1970-05-21
CA919432A (en) 1973-01-23
FI50939B (de) 1976-05-31
NL6914487A (de) 1970-04-28
DK125236B (da) 1973-01-22
ES372872A1 (es) 1971-11-01
IL33100A (en) 1973-08-29

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