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Publication numberUS1256255 A
Publication typeGrant
Publication dateFeb 12, 1918
Filing dateFeb 16, 1917
Priority dateFeb 16, 1917
Publication numberUS 1256255 A, US 1256255A, US-A-1256255, US1256255 A, US1256255A
InventorsHoratio A Porter
Original AssigneeHoratio A Porter
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1256255 A
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Description  (OCR text may contain errors)




1,256,255. Patented Feb. 12,1918.

fiv ig 'lll A! ing rifles much difliculty has been encoun- HORA'IIO A. PORTER, OF SOUTH HADLEY FALLS, MASSACHUSETTS.


Specification of Letters Patent.

Patented Feb. 12, 1918.

Application filed February 16, 1917. Serial No. 149,022.

To all whom it mciy concern:

Be it known that I, HouA'rio A. Poa'rnn, a citizen of the United States, residing at South Hadley Falls, in the county of Hampshire and State of Massachusetts. have invented certain new and useful Improvements. in Testing-Cartridges; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in testing cartridges, and the principal object of the invention resides in the provision of a cartridge which is adapted to be used in assembling and testing rifles.

Heretofore in the use of the ordinary dummy cartridge in assembling and test tered through the fact that continual use of the same causes the bullet to gradually be driven back into the shell thus rendering the cartridge inaccurate and the present invention comprehends the reinforcing of the bullet and shell in such a manner as to overcome the difliculty above mentioned.

A still further object of the invention resides in the provision of a dummy cartridge which may be used in drills or the like.

With these and other objects in view, the invention consists in the novel combination and arrangement of parts which will be fully set forth in the following specification and accompanying drawings, in which m Figure 1 is a side view in elevation of a cartridge constructed in accordance with this invention;

Fig. 2 is an enlarged longitudinal sectional view through Fig. 1; and

Fig. 3 is a view similar to Fig. 2 of a modified form of cartridge.

Referring to the drawings, the numeral 1 designates the shell of the ordinary type provided with the reduced end 2. This reduced end terminates in a reduced flange or collar 3 over which the bullet fits. Both ends of the shell are open and fitted in the enlarged end is a steel plug 4 having a flange 5 formed integrally therewith which flange engages the enlarged end of the shell and projects slightly beyond the shell as clearly shown in Fig. 1 in the ordinary way.

suitable bore 6 is formed centrally of the plug and registers with the usual cap and anvil between which the fulminating compound is usually placed. Formed integrally with the plug and extending axially through the shell is a steel stem 7 formed at its opposite end with an enlarged head 8 which fits within the collar 3 and is provided with the reduced stud 9 over which the bullet fits.

The bullet above referred to is designated generically by the numeral 10 and comprises a body 11 shaped in the ordinary way and this body is provided with a bore 12 for the reception of the stud 9 by means of which the bullet is connected to the stem 7. A flange 13 is formed on the butt end of the body 11 and surrounds the flange 3 in order to insure a smooth connection with the shell at this point.

It will be apparent from the foregoing that in assembling the preferred form of dummy cartridge the plug 4 is first fitted into the shell 1 so that the head 8 fits tightly within the collar 3 with the stud 9 projecting beyond the end of the collar. The bullet 10 is then placed in position by inserting the stud 9 into the bore 12 and forcing said bullet back so that the flange 13 overlies the flange 3 whereupon the whole is soldered or brazed in order to secure the parts against movement. It will be understood that if so desired the stud 9 may be threaded and the bore 12 provided with internal threads so that the parts may be screwed together and the brazing or soldering process eliminated.

In the modified form of the invention illustrated in Fig. 3 the shell is designated by the numeral 14 and is provided with the reduced portion 15 on which the bullet 16 is formed integrally. This bullet 16 is provided with an internally screw threaded bore 17 in its butt end into which the threaded stud 18 formed on the head 19 is screwed. This head like the head 8 is supported at the forward end of the steel stem 20 which is formed integrally with the plug 21 which is adapted to fit within the large end of the shell and like the plug previously described is formed with a bore 22 which registers with the fulminating cap of the ordinary cartridge. A suitable recess 23 is formed in the plug near the opening or bore 22 for the reception of the spanner wrench by means of which the plu is firmly screwed in place. It will be an erstood that any suitable type of spanner wrench having lugs spaced at the proper distance thereon may be used for tightening the plug in place.

In assembling the modified form of shell it will be seen that the only necessary operation is to enter the threaded stud 18 into the bore 17 of the bullet whereupon the tightening of the same will draw the plug 21 lnto the opposite end of the shell thus securing the whole firmly in place and reinforcing the bullet with the central rod or stem 20 in such a manner-as to prevent the shell from collapsing when pressure is applied to the opposite end thereof.

While in the foregoing there has been shown and described the preferred embodiment of this invention, it is to be understood that such changes may be made in the combination and arrangement of parts as will fall within the spirit and scope of the appende claims. 1 I

What is claimed is ,1. A dummy cartridge comprising a shell, a bullet adapted to be carried by one end of the shell, a plug fitted in the opposite end of the shell, and means carried by the plug and extending longitudinally of the shell to reinforce the bullet and prevent the same from being forced into the shell.

2. In a testing cartridge, a shell having a collar at its reduced end, abullct fitted on the collar and extending beyond the end of the shell, said bullet bein provided with an axial bore in its rear en a plug adapted to be fitted in the enlarged end of the shell and a reinforcing means extending from portion at one end of said shell, a collar formed on the reduced portion, a bullet having a longitudinal" bore extending into the butt end thereof, a flange formed on the butt end of said bullet and adapted to fit over the flange on the shell, a plug in the enlarged end of the shell, a flange .on the plug adapted to engage the butt end of the shell to limit the inward movement of the plug with relation'to the shell, said flange extending beyond the periphery of the shell, a steel stem extending inwardly from the plug into the shell, a' head at the inner end of the plug and fitting within a collar of the shell and a stud formed on the head of the bullet said head and flanges being adapted to be brazed together to secure the elements against relative movement.

4. A dummy cartridge comprising a shell,

a ball at one end of the shell, a, plug in the opposite end of the shell and means carried by the plug for engaging the ball to reinforce the sameand prevent accidental relative movement ofthe shell and ball.

In testimony whereof I aflix my signature in presence of two witnesses.



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2553704 *Jul 26, 1947May 22, 1951Eckel Vincent WHead space gauge for firearms
US2668360 *Mar 6, 1950Feb 9, 1954Keller Ervin JHeadspace gauge for firearms
US2882821 *Nov 4, 1955Apr 21, 1959Benson Albin NDummy cartridge
US3067680 *Dec 13, 1957Dec 11, 1962Lahr Robert GToy cartridges and toy projectiles therefor
US3165058 *Dec 10, 1962Jan 12, 1965Lahr Robert GToy cartridges
US3233353 *Dec 10, 1962Feb 8, 1966Lahr Robert GToy gun and projectiles therefor
US3333539 *Dec 20, 1965Aug 1, 1967Dynamit Nobel AgPractice ammunition
US4450769 *Jun 1, 1982May 29, 1984Werkzeugmaschinenfabrik Oerlikon Buhrle AgDummy ammunition
US4608762 *Jul 30, 1985Sep 2, 1986Varner Robert FFor use with a given cartridge case and bullet combination
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U.S. Classification102/430, 73/167, 33/506
Cooperative ClassificationF42B5/02, F42B8/08
European ClassificationF42B8/08