Firearms – Barrels – Auxiliary
Patent
1984-11-21
1987-03-10
Kyle, Deborah L.
Firearms
Barrels
Auxiliary
42 7504, F41C 300, F41C 2110, F41C 2122
Patent
active
046481923
DESCRIPTION:
BRIEF SUMMARY
The invention relates to firearms, especially, though not exclusively, firearms for use by security forces for dispersing rioters and the like.
It is known to provide `riot-gun` firearms to fire one of a number of different types of ammunition such as large- or small-calibre flare rounds, baton-rounds, gas cartridges and live ammunition such as shotgun rounds.
Unfortunately this has required the utilisation of a large number of firearms, and it is impracticable for a user to have to carry several firearms to suit different calibres or types of ammunition.
The invention provides a firearm comprising a gun body incorporating a firing mechanism, and having means mounting a barrel so that the latter is movable between a barrel loading position and a firing position, means maintaining the firing mechanism inoperative unless the barrel mounting means is correctly in the firing position, the body further having means for releasably mounting a shoulder stock whereby to be selectively usable in pistol form or rifle form, the firearm further comprising a kit of barrel parts which are selectively usable with the gun body and which include a first barrel of a length capable of firing baton rounds and gas rounds, an insert of a similar length adapted to be fitted from one end only, the end adjacent to the barrel mounting means, into the first barrel to provide a smaller calibre barrel, a second barrel of a smaller length than the first barrel capable of firing flare rounds, and an insert of a similar length to the second barrel adapted to be fitted from one end only, the end adjacent the barrel mounting means, into the second barrel to provide a smaller calibre barrel, the gun body selectively mounting the first or second barrel and the shoulder stock, and the selected barrel selectively receiving a respective insert whereby to provide for a multi-purpose firearm.
Preferably also the barrel mounting means of the gun body comprises a screw threaded arrangement co-operating with a screw threaded arrangement of the selected barrel. Alternatively the barrel mounting means of the gun body comprises a snap fit arrangement co-operating with parts of the selected barrel.
The selected barrel may comprise a recess for receiving a flanged end of the selected insert, whereby the latter is clamped between the barrel and a main part of the gun body.
In another arrangement a breech part of the gun body comprises a recess for receiving a flanged end of an insert arrangement, whereby the latter is clamped between the breech part and a main part of the gun body.
The insert arrangement may comprise a member within which the selected insert is mounted and which is adapted to space the selected insert from the barrel, the flanged end being provided on the spacing member.
Desirably means are provided on the gun body for ejecting spent cartridge cases, the ejecting means being adapted to co-operate either directly with the cases or indirectly with the cases by means of auxiliary ejecting means associated with the selected insert.
Embodiments of the invention will now be described by way of example only and with reference to the accompanying drawings, in which:
FIG. 1 is a schematic side elevational view of a firearm according to the invention, fitted with a large-calibre barrel, certain parts being shown in cross-section;
FIGS. 2a and 2b are schematic side elevational views of a front part of the firearm similar to that shown in FIG. 1, having fitted thereto a small-calibre barrel-insert inside the large-calibre barrel;
FIG. 3 is a cross-sectional view of a part of the firearm of FIG. 1, having fitted thereto a short large-calibre barrel with a small-calibre barrel insert therein; and
FIG. 4 is a cross-sectional view of a part of the firearm shown in FIG. 1, showing an alternative barrel mounting.
FIG. 1 shows a firearm having a gun body 10 having a socket at a rear part for receiving a stock 12 and having a pistol grip 14. A breech block 16 is mounted on the gun-body 10 by means of a pivot 18, the breech block being secured to the gun-body
REFERENCES:
patent: 2423471 (1947-07-01), Summerbell
patent: 3156995 (1964-11-01), Mellor
patent: 3251267 (1966-05-01), Hauser
patent: 3842527 (1972-10-01), Low
D. H. R. Archer, Jane's Infantry Weapons, Published in 1976, Jane's Yearbooks (London, GB) pp. 441, 442, 459.
Adams, III W. Thad
Hilton Gun Company Limited
Kyle Deborah L.
Parr Ted L.
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