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Publication numberUS3728937 A
Publication typeGrant
Publication dateApr 24, 1973
Filing dateApr 30, 1971
Priority dateApr 30, 1971
Publication numberUS 3728937 A, US 3728937A, US-A-3728937, US3728937 A, US3728937A
InventorsNelson B, Scibor A
Original AssigneeNelson B, Scibor A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Gas fired caseless ammunition rifle
US 3728937 A
A caseless ammunition, bolt action, rifle charged with gas and fired electrically. The firing chamber is sealed with a truncated cone insert, having thin walls which are contracted around the bolt by gas pressure, to seal against back pressure leakage.
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Description  (OCR text may contain errors)

Elite fies nteni 1 1 1 1 3,728,937

Nelson et a1. 1451 Apr. 24, 1973 54] GAS FIRED CASELESS AMMUNITION 1,237,157 8/1917 Bellairs ..89/7

RIFLE 2,094,854 10 1937 Smith ..89/7

1,596,057 8/1926 Mallory ..89/7 [76] Inventors: Bruce C. Nelson, 6304 Martin, 3,427,924 2/1969 Johnsen ..42/84 Detroit, Mich. 48210; Alphonse G. 1,290,596 l/19l9 Lewis 1 ..89/7 Scibor, 6540 Longacre, Detroit, 3,343,455 9/1967 150m ..89/7 Mich. 48228 I Primary ExaminerBen am1n A. Borchelt 1 Filed? p 30, 1971 Assistant Exarr1inerC. T. Jordan [2]] Appl. N0.: 138,925 A!l0rney-Edward M. Apple 57 1 ABSTRACT {52] US. Cl ..89/7, 89/26 51 11m. c1 ..114111/04, F4lf 11/00 A caseless lmmumuon acnon Charged gas and fired electrically. The firing chamber is sealed of Search R, a truncated cone i having thin walls 89/26 are contracted around the bolt by gas pressure, to seal against back pressure leakage. [56] References Cited 1 Claim, 4 Drawing Figures UNITED STATES PATENTS 1,291,674 1/1919 Brannon ..89/7

GAS FIRED CASELESS AMMUNITION RIFLE This invention relates to a rifle designed to shoot caseless ammunition by charging the rifle with gas, and firing the charge electrically.

An object of the invention is to provide a rifle which will not jam after firing, because there is no empty cartridge shell or case to be ejected.

Another object of the invention is to gas charge, and electrically fire, a rifle in much the same manner as an internal combustion engine is operated. In this instance a projectile is substituted for the engine piston.

Another object of the invention is to provide a rifle which may be fired with hydrocarbons and oxygen, both in a gaseous state. This has various advantages over rifle using metal cases in that it is more economical to shoot and there is no need of buying expensive metal cased ammunition.

Another object of the invention is to provide a rifle which may quickly be adjusted to provide different amounts of foot pounds of muzzle energy, so that the same rifle can fire at long range, medium range, and for target practice with less wear and tear on the device and less fatigue to the operator.

Another object of the invention is to provide a device of the character indicated, which is provided with integrated receptacles for holding the gases which are to be mixed in the firing chamber.

Another object of the invention is to provide a device of the character indicated, which may be supported in the arms of the operator, or may be used as a light machine gun, in which event the gas tanks could be detached from the gun and carried separately.

Another object of the invention is to provide a device which may be mounted on a stationary member, or may be mounted on a mobile unit, or an airplane, with the tanks incorporated into the structure of the machine.

Another object of the invention is to provide a device of the character indicated, which fires clean and emits only CO and H 0.

Another object of the invention is to provide a rifle which may be fired electrically, or with caps, or with the compression of its own gases.

Another object of the invention is to provide a device of the character indicated, which is provided with a.

truncated cone insert in the firing chamber, which insert has comparatively thin walls which are contracted about the bolt by the exploding gases to prevent leakage of the gas around the bolt.

Another object of the invention is to provide a device of the character indicated, which may be manufactured and assembled inexpensively, in as much as it has few machined parts.

Another object of the invention is to provide a device of the character indicated, which will warm itself in cold weather and will facilitate its use under adverse weather conditions.

The foregoing and other objects and advantages of the invention will become more apparent as the description proceeds, reference being made from time to time to the accompanying drawing, forming part of the within disclosure, in which drawing:

FIG. 1 is a longitudinal, sectional view taken through a rifle embodying the invention.

FIG. 2 is an enlarged section taken substantially on the line 2-2 of FIG. 1.

FIG. 3 is a section taken substantially on the line 3 3 of FIG. 2.

FIG. 4 is an enlarged detail illustrating a typical wiring circuit when the device is fired electrically.

Referring now more particularly to the drawing, it will be understood that in the embodiment herein disclosed, the reference character 7 indicates the barrel of the rifle which has a breech block or receiver 8, a bolt 9 having a handle 9A, a stock 10, hand grip 11, trigger 12 and trigger guard 13, all of which are conventional parts of a rifle and constitute no part of the invention except as they are combined with the elements hereinafter described.

The rifle embodying the invention is designed to shoot a bullet, or projectile 14, which may be of any desired caliber and which is fed into the barrel 7, by the bolt 9, as in conventional, single action practice. The rifle may also be equipped to load the bullets automatically, although no claim is made to such mechanism in this application.

Instead of using a brass cartridge to carry the explosive charge, we intend to fire this rifle by means of a mixed charge of hydrocarbons gas (preferably butane) and compressed oxygen.

In the embodiment shown in FIG. 1 a compressed butane cylinder 15, is housed in a suitable bore 16, formed in the stock 10. The cylinder 15 is provided with a shut off valve assembly 17 and a pressure regulator 18. The cylinder 15 is connected to the firing chamber 19 through a passage way 20, which passageway 20 is controlled by means of a valve assembly 21 and 22, which is threadedly mounted on a lateral extension of the breech bolck 8 as at 23. The valve member 21 is spring loaded as at 24, and may be opened by striking the button 25 with the palm of a hand. The valve stem 21 has a head 26 which engages a seat 27 and when the head 26 is lifted from the seat 27, the gas is permitted to enter the chamber 19 through the ports 28.

A compressed oxygen cylinder 29 is supported by any suitable means 29A and 29B, under the barrel 7. The oxygen cylinder 29 is provided with a shut off valve 30 and regulator mechanism 31 and communicates with the firing chamber 19 through a passageway 32 which is controlled by a valve assembly 33 and 34 having a palm button 35 similar to the mechanism 21-28 previously described in connection with the butane gas assembly.

Both the butane and oxygen being under compression, it is simply necessary to strike the buttons 25 and 35 to admit an explosive mixture into the firing chamber 19. The explosive mixture in the firing chamber may be fired electrically, by means of a glow plug 36, which is connected as at 37 to one side of a battery 38 (FIG. 4), the other side of the battery 38 being connected as at 39 to a safety fuse 40, which in turn is connected as at 41 to a contact element 42, which is mounted on a lever 43, which is part of the trigger mechanism 12. The contact 42 is normally held away from the glow plug 36 by a spring 44, which holds the trigger mechanism 12 in vertical position on the pivot 45 as shown in FIG. 4.

The firing chamber 19 is provided with a frusto conical insert member 46, which is threadedly received, as at 47, in a suitable bore formed in the breech block 3. The truncated cone member 46 has a central bore 48 in which is received a reduced portion of the bolt 9. The member 46 is also provided with comparatively thin walls around the bolt 9, as at 49, so that upon the firing of the charge from the chamber 19 the back pressure of the explosive gases contract the walls of the member 46 tightly around the bolt 9, to prevent escape of gases rearwardly from the chamber 19. The member 46 is also provided with radial webs 50, which trap the exploding gases and prevent them from swirling around the bolt 9 to more effectively exert pressure on the thin walls 49 to assist in sealing the firing chamber around the bolt area.

From the foregoing, it will be understood that by regulating the pressures in the passageways 20 and 32, it will be possible to effect a greater or lesser explosive charge in the chamber 19.

It is believed that the operation of the device is obvious from the foregoing description.

Having described our invention, what we claim and desire to secure by Letters Patent is:

1. In a rifle having a barrel, breech block, stock, hand grip and trigger assembly, the combination of a firing chamber in said breech block, means to seal said firing chamber against back pressure, means to feed caseless bullets to said barrel, a first compressed gas chamber, means to conduct gas from said first gas chamber to said firing chamber, a second compressed gas chamber in communication with said firing chamber, means to control the flow of gas from each of said gas chambers, and means to fire the mixture of gases in said firing chamber, to eject the bullets from said barrel, in which the means to seal said firing chamber include a truncated cone insert received therein, said cone having thin walls arranged to be compressed about the bullet feed means to seal the area around said feed means against gas leakage, upon firing the gas mixture in said firing chamber.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1237157 *Feb 23, 1916Aug 14, 1917Alan De Mowbray BellairsTrench-gun and the like.
US1290596 *Mar 1, 1918Jan 7, 1919James N LewisQuick-combustion gun.
US1291674 *Feb 14, 1917Jan 14, 1919Joseph L MayfieldRifle.
US1596057 *Aug 4, 1925Aug 17, 1926Mallory Junius LGas rifle
US2094854 *Jul 27, 1933Oct 5, 1937Smith Welding Equipment CorpGun
US3343455 *Sep 8, 1965Sep 26, 1967John H Hartman JrGun
US3427924 *Oct 20, 1966Feb 18, 1969Johnsen Erich CorneliusElectrically fired gun and cartridge therefor
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3996837 *May 8, 1975Dec 14, 1976General Electric CompanySeal
US4109557 *Apr 6, 1977Aug 29, 1978Zaucha Charles DGas rifle
US4654008 *Apr 18, 1983Mar 31, 1987Pulsepower, Inc.Automatic weapons effect signature simulator
US4664631 *Oct 31, 1985May 12, 1987Loral Electro-Optical Systems, Inc.Surrogate weapon for weapons effects signatures
US4949621 *Jul 19, 1989Aug 21, 1990Stephens Michael LLiquid propellant gun
US5153561 *Sep 19, 1990Oct 6, 1992Johnson Eric SSecured valuable box for beach goers
US5513550 *Apr 29, 1994May 7, 1996Field; Roger C.Firearm with pivoting barrel
US5758445 *Jul 16, 1996Jun 2, 1998Casull; Richard J.Chamber for a firearm
US7640925 *Mar 14, 2006Jan 5, 2010Smart Parts, Inc.Pneumatic assembly for a paintball gun
US7665396Dec 4, 2006Feb 23, 2010Tippmann Sports, LlcProjectile launcher
US7712244 *Nov 9, 2006May 11, 2010Mamae Tautofi Taurik IApparatus and method for fishing
US7770504Aug 12, 2005Aug 10, 2010Tippmann Sports, LlcApparatus and method for firing a projectile
US8015907Aug 15, 2007Sep 13, 2011Tippmann Sports, LlcProjectile launcher
DE2809410A1 *Mar 4, 1978Sep 6, 1979Gen ElectricZuendvorrichtung
EP0030297A2 *Nov 19, 1980Jun 17, 1981Ulf HöllthalerFirearm with a gaseous propulsive charge and projectile therefor
WO1991001475A1 *Jul 17, 1990Feb 7, 1991Michael L StephensLiquid propellant gun
U.S. Classification89/7, 42/84, 89/26
International ClassificationF41A1/00, F41A1/04
Cooperative ClassificationF41A1/04
European ClassificationF41A1/04