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Publication numberUS2356538 A
Publication typeGrant
Publication dateAug 22, 1944
Filing dateOct 14, 1940
Priority dateNov 22, 1939
Publication numberUS 2356538 A, US 2356538A, US-A-2356538, US2356538 A, US2356538A
InventorsHugo Schmeisser
Original AssigneeHugo Schmeisser
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Blank ammunition firing attachment for automatic guns
US 2356538 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

, Aug. 1944. H. SCHMElSSER 2,356,538


Patented Aug. 22, 1944 BLANK AMMUNITION FIRING ATTACHMENT FOB. AUTOMATIC GUN S Hugo Schmeisser, Suhl, Germany; vested in the Alien Property Custodian Application October 14, 1940, Serial No. 361,184 In Germany November 22, 1939 2 Claims.

The invention relates to automatic guns and particularly to a device for controlling the gas pressure in automatic blank cartridge firing with such automatic guns.

It is an object of the present invention to provide a device or an arrangement of this kind which is simple in construction and able to offer resistance in use and which may be easily manipulated especially for cleaning purposes.

The invention consists therein that the gas throttling is effected by means of a loosely fitting core-bar or stem adapted to be inserted into the barrel of the gun and having a smaller diameter than the bore of the said barrel.

It is a further object of the invention to provide a loosely fitting core-bar or stem which extends substantially over the entire length of the barrel of the gun.

A further object of the invention is to provide a fitting core-bar or stem which is rigidly connected with a silencer-funnel in such a manner that both parts form a practical unit for use. The means for securing the said unit to the automatic gun as for instance a screw thread are arranged preferably on the said silencer-funnel.

In the preferred form of the present invention the fitting core-bar or stem and the silencer-funnel are rigidly connected by riveting a reduced end of the core-bar to a portion of the silencerfunnel.

To these ends my invention consists in the novel construction and arrangement of parts to attain the ends above specified and in the details of construction and mechanism for other purposes, as will hereinafter more fully appear and which are defined in the claims at the end of this specification.

My invention in its preferred form or approximately such form is illustrated in the accompanying drawing, in which Fig. l is a central longitudinal section of a portion of an automatic gun constructed in accordance with the present invention, only so much of the barrel being shown as is necessary for the purpose of explanation, and

Fig. 2 is a sectional view through taken on the line 22 of Fig. 1.

In the drawing I designates the front part of the barrel of an automatic gun and 2 a loosely fitting core-bar or stem inserted into the bore of the barrel and having a little smaller diameter than the bore of the barrel. On the muzzle of the gun is fixed by means of screw thread 31) a silencer or casing funnel 3 provided with the gas channels 3a offset laterally from the silencer,

the bore of the barrel and secured to the front end of the fitting core-bar 2 so that both parts, viz., the fitting core-bar 2 and the silencerfunnel 3 form a unit. In the example shown the front end 2a. of the fitting core-bar or stem projecting from the muzzle of the gun is reduced or stepped and riveted to the central portion of the silencer-funnel as indicated at 2b. Instead of the use of a screw thread other suitable means may be used for connecting the silencerfunnel with the muzzle of the barrel.

If in operation an automatic gun arranged for loaded or bulleted cartridge firing is to revert into an automatic gun arranged for blank cartridge firing, i. e., with the usual and known cartridges without bullets, it is only necessary to insert the fitting core-bar 2 provided with the silencer-funnel 3 into the barrel of the automatic gun and to screw up the silencer funnel 3 with its screw thread upon the screw thread on the front end of the barrel.

It is obvious that the device according. to the present invention is simple in its construction and cheap to manufacture and permits an easy and quick changing of an automatic gun from one kind of firing to another one.

A further advantage of the device according to the present invention consists in its high capacity of resistance and in the convenient possibility for cleaning.

It will be understood that I do not limit myself to the details of construction above set forth, but, on the contrary, that many modifications may be made within the broad scope of my invention.

What I claim and desire to secure by Letters Patent of the United States is as follows:

1. In an automatic gun a barrel, a silencer casing having openings at both ends in line with said barrel, removably secured to the muzzle of the barrel, said casing having a central portion extending across the same intermediate its ends, and a core rod secured to said central portion, extending into the bore of the barrel and spaced from the wall of the bore, and said central portion being formed with a plurality of openings eccentric to the barrel axis, each of said last named openings forming a communication between said first named openings.

2. The gun as claimed in claim 1 wherein the rod extends substantially the length of the barrel and the eccentric openings are spaced laterally from the space in the barrel between the rod and the wall of the bore.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3687000 *Apr 30, 1970Aug 29, 1972Us ArmyGas operated firearm muzzle attachment
US4907489 *Aug 31, 1988Mar 13, 1990The United States Of America As Represented By The United States Department Of EnergyBlank fire configuration for automatic pistol
US5438907 *Aug 15, 1994Aug 8, 1995Reynolds; George L.Blank firing adaptor
US5829180 *Sep 25, 1995Nov 3, 1998Leiter; Edward J.Blank-firing semiautomatic pistols
US7926405Aug 12, 2006Apr 19, 2011Ducastel Jr Charles JSimulated firearm
US7942090 *May 7, 2009May 17, 2011The United States Of America As Represented By The Secretary Of The ArmyEnhanced operating life blank fire attachment for gas-operated weapons
US20150040452 *Mar 27, 2014Feb 12, 2015Wes InskeepBarrel safety device
U.S. Classification42/106, 89/14.5
International ClassificationF41A33/00, F41A21/26, F41A21/00, F41A19/00, F41A19/03
Cooperative ClassificationF41A19/03, F41A21/26, F41A33/00
European ClassificationF41A19/03, F41A33/00, F41A21/26