Classifications

• • 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

Definitions

• This invention relates to improvements in and to gun propellant charges, and in particular it relates to a macrogranular charge.
• Gun propellant charges usually consist of a large number of small elongated grains or members, each with one or more axial perforations, or bundles of sticks which are usually the length of the charge containing part of the cartridge case and. are packed longitudinally.
• the object of the present invention is to produce a improved gun propellant charge in which greater control reproducibility of charge dimensions, and hence more 15. reproducible ballistics are obtainable, and also to gain increase in charge volume and hence better ballistic performance.
• the invention comprises a macrogranular gun pro ⁇ pellant charge comprising a block having an elongated bo
• plurality of longitudinally positioned spaced channels t said cylindrical block preferably having additives dispersed in the charge at selected localities whereby t control the action of the additives in relation to selec areas of the charge during burning.
• the invention includes a method of manufacture and use.
• FIG. 1 is a perspective view of a pair of macro- granular gun propellant charge blocks placed end to end according to this invention, showing part of the first 10. block in section to show how the holes extend through the blocks and align, in adjacent blocks,
• FIG. 2 is a fragmentary view showing how two such blocks can be placed end to end but showing an independent interface orientating member between the blocks, and
• FIG. 3 shows how such a block fits into a propellant chamber in say a cartridge, only one block being shown.
• the macrogranular propellant charge block 1 forming the invention is of circular form to fit the chamber of a barrel or member in which it is
• the block can be of any required length but if desired it can be used in multiple arrangement as shown in FIG. 1 where a pair of blocks 1 and 1A are placed end to end, register means 3 being provided, the register means 3 being a socket engaged by a tongue 4 formed respectively on the blocks 1 and 1A. This gives the correct orientation 5. to the blocks 1 and 1A to line up the channels 2 through which the required gas circulation and gas flow takes place.
• two blocks 1 and 1A are connected by an interface member 5 again apertured in the required manner and carrying register means in the form 10. of tongues 4A engaging sockets 3A in the blocks.
• orientation can be effected by various means provided the means are so arranged that the channels 2 in the blocks 1 and 1A are correctly lined up for the required action.
• peripheral area 6 represents an additive such as a combustion control substance or a bore protection medium but this can be variously positioned depending on where it is most effective. Also a smoke inhibitor can be placed where best
• the propellant charge consists of a block 1 of generally -cylindrical cross section with a series of spaced longitudinal channels through it for burn control, and a series of such blocks
• 20 can be used to form a stack of such blocks placed end to end blocks each with a plurality of channels in the axial direction generally symmetrically spaced in cross section, the block or blocks having a diameter to neatly fit a cylindrical propellant chamber of a gun or gun cartridge or
• the propellant is in the form of a solid body extending across the dimensions of the chamber in which it is housed and has the multi- 30.
• the length of the propellant charge blocks being such as to completely fill the space in which the charge is housed, or as said a series of blocks can be used end to end to fill the space but with each block itself of a cross sectional dimension to neatly fit the diameter of the bore which receives the propellant charge block or blocks.
• An additive can be positioned anywhere over the 5. whole cross-sectional area and could be associated with areas central or outward in the block as by moulding or extruding a complete block such placement can be readily selected.
• the advantages sought are 10. obtainable in that the propellant charge block can be designed for maximum effect as it occupies the sole cross sectional area of the propellant chamber and the longitudinal holes can be formed in their maximised positions and in the case of where a series of blocks 15. are used end to end register means can be included to ensure correct positioning of the longitudinal holes if for instance they are to be continuous in the final assembly.
• a smoke inhibitor, corrosion 20. inhibitor, combustion control substance, flash suppressor or wear inhibitor is to be added this can again be selectively placed at the outer surface of the propellant charge or at selected internal positions, such as at the channels, where it may achieve maximised results, or such a 25.
• material may be included in an interface between blocks of a multi-block charge or incorporated Into the pro ⁇ pellant, at any selected area and does not interfere with the general explosive action of the propellant charge, or the simplified loading of charge into a chamber, cartridge 30. or the like.
• a simple and effective charge is provided which is moulded or extruded in a form to fit the length of a chamber when a single block is used and of a cross sectional dimension the same as the chamber or alternatively 5.
• a series of successively placed propellant charges can be used arranged end to end in the space and ' each conforming the the dimensions of the chamber, to thereby avoid the need of stacking bundles of sticks as exemplified for instance in the prior art, and ensuring that the 10. best results are obtained from the solid propellant charge .

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Portable Nailing Machines And Staplers (AREA)
• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=3697000

Family Applications (1)

Country Status (2)

Families Citing this family (1)

Family Cites Families (7)

• 1985
  • 1985-08-06 WO PCT/AU1985/000186 patent/WO1986001280A1/en unknown
  • 1985-08-06 EP EP19850904064 patent/EP0192670A1/de not_active Withdrawn

Non-Patent Citations (1)

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