US933030A

US933030A - Shell-primer for breech-loading guns.

Info

Publication number: US933030A
Application number: US43865808A
Authority: US
Inventors: Edgar M Funk
Original assignee: LIBERTY CARTRIDGE Co Inc
Current assignee: LIBERTY CARTRIDGE COMPANY Inc; LIBERTY CARTRIDGE Co Inc
Priority date: 1908-06-15
Filing date: 1908-06-15
Publication date: 1909-08-31
Anticipated expiration: 1926-08-31

Description

E. M. FUNK.

SHELL PRIMER FOR BREEGH LOADING GUNS.

APPLIOATION FILED JUNE 15,1908.

933,030. Patented Aug. 31, 1909.

Quinn alter,

.15 the center of which is or cap and, furthermore, the base or primer.

UNITED s'rArEs PATENT orrron.

EDGAR M. FUNK, OF WYTHEVILLE, VIRGINIA, ASSIGNOR TO LIBERTY CARTRIDGE COMPANY, INC. i A CORPORATION OF VIRGINIA.

SHELL-PRIMER non fi RE ECH-LOADING GUNS.

Specification of Letters Patent.

Patented Aug. 31, 1909.

Application filed June 15, 1908. Serial No. 438,658. 1

To all whom it may concern:

Be it known that. I, EDGAR M. FUNK, a citizen of the United States, residing at \Vytheville, in the county of VVythe and State of Virginia, ha'vcinvented anew and useful Shell Primer for Breech Loading Guns, of which the following is a specification.

This invention has reference to improvements in shells and primers for breech loading guns, being designed more particularly for the shells of shot guns.

The shells of shot guns. are customarily made of a paper body with a heavy base in inserted the primer end of the shell is reinforced byan outer metal sheath. In certain types of paper shells the cap or primer is provided with a small perforation on the powder end and contains a small block or anvil against which the fulminate carrying cap proper is forced by the firing pin of the gun and the ignited gases caused by theexplosion of the fulmi- 5 nate must pass around the block or anvil find their way through the and ultimately opening or perforation at the powder end of the primer into the powder chamber of the shell to cause the ignition of the powder. In the practlcal use of such primers the thin copper plate or fulminate carrier is forced by the firing pin against the pointed end of the anvil within the primer, and is ofttimes perforated, permitting the gases generated 5 by the explosion to find their way outward through such perforated cap. Furthermore,

the primer is separate from the metal cov-,

ermg over the base of the shell and the gases of explosion sometimes find their way be- 4n tween the outer walls of the primer and the adjacent walls of the, base of the shell in 'which the primer -is seated and escape through the breech of the gun.

Itis the object of the present-invention 5 to avoid these defectsin shells as heretofore constructed and not only to retain all the ad vantages of the prior constructions, but to provide other advantages not-found in shells of thecharacterto which this invention relates, as heretofore made. 7

In accordance with the present invention the anvil, within the primer is retained, but

instead ofbeing actively fixed or rigid in the primer, it is in the form of a movable structed as to avoid block. Furthermore, the anvil is under the control of a cap which, however, does no carry the fulminate and which is so con danger of beingpen forated by the impact of the firing pin .of the gun. charge of powder without danger of a flare back is insured by placing the fulminatejatthe powder 'end of the primer and exploding the same by the movement of the anvil or block within the primer under the impact 5 of the firing pin transmitted through the reinforced cap, which latter is so firmly seated in the primer as to prevent any escape around the same of the high pressure gases of-explosion. This enables me to provide the fulminate in the form of separate charges, preferably of disk shape, which may be placed within the primer at the powder end thereof with the anvil or firing block uponsaid fulminate, and by this means the perforation provided for the passage of the gases of explosion to the"powder in the shell may be larger than usua1,-thus insuringa lar e area of action of the flame produced by t e explosion of the fulminate upon the powder. constituting the explosive charge .of .the shell and. doing away with the necessity of the flame passing through long, tortuous passages before reaching the. powder. This construction, also, facilitates $5 the re-loadingpf the shells and permitstbe use of the fulminate in small disks or blocks which are brought into the closest possible relation to the powder charge in the. shell.

In order to prevent the escape of the gases of explosion between the outer walls ofthe primer and the walls of the. base of the shell in which the primer is seated, the present invention contemplates the formation of the-primer casing and the metal and plate at the base of the shell all in one piece although in some forms of'the invention the primer case may bemade separate from the baclc plate of the shell, as is customary in con Structions heretofore'proposed.

In order to more certainly insure the explosion of the fulminate', that portion of the i movablebloek or anvil engaging said fulniinate may be roughened or made irregular in-contonr in any suitable way, or the seat for the fulininate at the powder endof the primer case may be roughened or provided with spurs or projections. 1

Certainty of theignition of the v The invention, also, contemplates certain improvements in the manner of attaching the metal reinforcement surrounding the base of the paper body on the shell which improvements will be more particularly de base end of a shell constructed in accordance with the present-invention. Ijig. 2 is a similar section showing a slightly modified form. Fig. 3 is a similar section showing another slight modification, Fig, 4 is a detail section on a larger-scale than the other figures, showing the fulminate end of the block or anvil and the fulminate seat in the primer case. Fig. 5 is an exterior view of a car.- tri'dge shell constructed in accordance with the present invention. .Fig. 6 is" a section of an improved fulminate carrying cap.

Referring to the drawings, there is shown a shell 1 which may be considered as constructed of compressed paper or paper pulp after the common practice of manufacturing paper shells for breech loading shot guns. This shell is provided with the usual compressed paper base'2 at the primer end as is customary. Seated centrally'in and. extending through the base 2 is a cylindrical casing 3 constituting the casing of the primer, and

in the particular form shown in'the drawings, this primer casing is expanded both internally and externally toward the outer end, as shown at 4. At the powder end the primer is provided with a central passage way 5 around which there is formed an interior ledge 6 for a purpose which will presently appear.

Within the primer casing there is housed a block 7 snugly but freely fitting the interior of thecasing and capable of free longitudinal movement ther'ein. The end of the 7, block 7 remote from the powder end of the primer casing may be reduced in diameter to form a frusto-conical extension 8. The expanded end of the primer casing 3 is designed to receive a cap 9 snugly fitting the interior of the casing and firmly held there in by frictional contact. The interior diameter of this cap is such as to permit it to .pass freely over the corresponding end of the block or anvil/7. The end wall of the cap 9 is, when the cartridge is in the gun, in

thepath of the firing pin ofthe gun, and the center of the end wall of the cap 9 where thickened, as by the formation of a button 10 on the inner face of the end wallof .the cap, or in any other suitable manner, and this button is designed to engage the corre sponding end of the block or anvil 7'. It is to be observed that thefrusto-conical end, or the block 7 presents a broad engaging face for the button 10 and there is therefore no danger of perforating or rupturing the end wall of the cap as is the case in the structures heretofore used, where the active end of the block was pointed, and the cap carried the fulminate. That end of the block 7 adjacent to the powder 'end of the primer casing may be formed with an annular series of projections or teeth 11 or be otherwise of irregular shape, or may, if desired,

be simply finished smooth,-although the ac a disk of appropriate size and thickness designed to be confined between the active end of the block 7 and the ledge .6 on the inner face of the powder end of the primer casing 3. The ledge 6 may either be finished smooth in-the form of a plain annular flange, or the ledge may be formed with inwardly projecting'teeth or irregularities 13 upon which the fulminate disk is seated, and these teeth or irregularities 13 may face the smooth end constituting the active face of the block 7, or any arrangement of parts may be provided. It will be understood that the active end of the block 7 may be either smooth or roughened or irregular, or the active face of the ledge 6 may be smooth or irregular, but both these parts where they are designed to engage the fuhninate disk are not so formed, since this is unnecessary.

If it be assumed that there is confined a disk or-block 12 of fulminate between the anvil 7 and the ledge 6 and that within the cartridge shell'there is a powder charge and that the-shell be placed in the gun and the cap 9 be subjected to the impact of the firing pin under the usual action of the hammer, then the force of the blow of the firing pin is transnntted by the button 10 to the corresponding end of the block 7, and this block is moved longitudinally in the primer casing 3 and imparts a hammer blow to the fulminate 12, thus causing the ignition of the latter and the flame generated by the explosion of the fulminate passes at once through the perforation 5 in the powder end of the casing 3 and into contact with the powder charge. iecnuse of the .close relation of the fulniinate to the powder charge the flame produced by the explosion is communicated at once to the powder, and will act thereon over a comparatively large area, thus infiznnmg a large proportion of the powder charge at once, and thereby causing a very rapid ignitionof the powder charge throughout this mass. The cap 9 may be forced into the corresponding end of the primer casing as tightly as may be desired, thus preventing any escape of the gases of explosion between the outer walls of the cap 9 and the inner walls of its seat in the primer casing 3. To further prevent any chance of escape internal diameter toward the powder end,

which portion is designed to receive the block 7, maybe under-cut as indicated at 14-,

to receive the edge of the free end of the cap 5), and thus aid in sealing such edge of the cap against passage of the gases of explosion. The reinforcement of the closed end of the 'cap 9 by the button 10 or otherwise effectually prevents the perforation of the end of the capby the impact of the firing pin, while-the slight givingof the closed end of the cap 9 is permitted by the thinner walls of the cap outside the button 10.

When it is desired to reload the cartridge the block 7 and cap 9 are readily forced out of the primer casing 23 when another disk or block 12 of fulminate is introduced into the casing 3 and the block 7 is then returned to the casing and finally the cap 9 is again forced into its seat, without danger of cans.- ing the explosion of the fulminate because its movement into the casing 3 islimited by the shoulder 14.

As shown in Fig. 1, the outer or cap end of the primer casing 8 is formed into an annular plate 15 designed to form-the metal covering for the base end of the cartridge shell, and this plate15 is formed with a tubular flange 16 designed to receive the corresponding end of the cartridge shell 1. ()verlying the end plate 15 is another plate 17 having a central perforation of suflicient size to permit the passage of the cap 9 and this plate 17 is formed with a peripheral bead 18 constituting a shoulder for limiting the introduction of the cartridge shell into the breech of the gun. The end plate 17 is formed with an annular tubular extension 19 on one face closely embracing the I corresponding end of the cartridge'shell and flange 23 formed on the plate 17 and upset sufficiently extensive to reinforce the powder chamber of the shell. This extension 19 is headed into the body 1 of the shell immediately adjacent to the free end of the flange 16, as indicated at 20, and at its extreme end this extension 19' is crimped into the body 1 ofthe shell, as indicated at 21, thus insuring close and proper contact of. the outer lining orreinforcement- 19 with the body of the paper shell.

In Fig. 2 the plate 15 with its reinforeement 16 is omitted and the primer casing 3 terminates at its outer end in an annular flange seated on an inturned annular into the base 2. Otherwise the structure is the same as shown in Fig. 1.

In Fig. 3 the structure is similar to that the fulminate,

shown in Fig. 1, except that the extra plate 17 is omitted and the plate 15 is headed over at the edges as shown at 24 andinterlocked intoareinforcing sleeve 1 25- corresponding to the outer lining or reinforcement 19 of the structure of Fig. l. p The several modifications which have beeii described may be taken as illustrative of various modifications of which the invention is capable, and it IS to be therefore'understood that other modifications of the structure may be made whilestill retaining the salient points of the invention.

In the foregoing description the word fulminate has been used to designate the percussion element of the primer, but it will be understood that this term is illustrative or typical only and is designed to include any suitable percussion e'xplosiveand is not limstamping a trade name or trade mark or any lettering or wording into the sleeve 19 so as to force the metal into the paper body of the shell to a sufficient extent to prevent the turning or moving of the sleeve and to firmly anchor it to the said shell body. This is shown at 26, Figs. 1 and 5.

I The reinforced cap 9 isyuseful with primers as heretofore constructed and may carry as shown in Fig. 6, the reinforcement 10 preventing the piercing or rupturing ofthe closed end of the cap when forced against the detonating block of the .prior structure.

'What is claimed 1s:

' 1 .-In a cartridge, a primer provided with means forreceiving'fu'lminate at the powder end of said primer, means within the primer for transmitting animpactblow to the fill minate to explode the same, and means for hermetically sealing the end of the primer remote from the powder end and through which means the impact blow is transmitted to the interior impact transmission means of the primer.

2. In a cartridge, :1. primer having a movable member interior thereto and adapted to receive the fulminate between said movable member and the powder end of the primer, and a hermetic closure'for the other end of the primer through which closure an impact blow" is transmitted to the movable member in said primer.

adapted to receive fulminate between said movable member and the powder end of the primer, and a closure for the'other end ofthe primer provided with a reinforcement nate, a block within said primer, and movable longitudinally therein, and a cap closing the other end of the primer remote from the end carrying the fulminate and in operative relation to the block within the primer, whereby a blow may be transmitted through the cap to the block within the primer to move the said block into operative contact with the fulminate.

5. In a cartridge, a primer comprising a casing open at eachend, said casing being formed with an inwardly directed annular ledgeat the powder end to receive a charge of fulminate, a block within said casing and movable longitudinally therein, and a cap closing the other end of the casing, said cap being provided with a reinforcement adapted to engage the block within the casin 6. In a cartridge, a primer comprising a casing open at each end with the opening atone end contracted to form an annular ledge atsaid end of the casing, and the other end of the casing being expanded to form a section of greater internal diameter than the powder end of the casing,'a block in said :asing, movable longitudinally therein and adapted to engage fulminate seated on the ledge at the contracted end of the casing, and a cap adapted to snugly fit the expanded end of the casing and having its closed end in operative relation to the corresponding end of the block.

7 In a cartridge, a primer comprising a casing open at each end with theopening at one end contracted to form an annular ledge at said end of the casing, and the other end of the casing being expanded to form a section of greater internal diameter than the powder end of the casing, a block in said casing, movable longitudinally therein and adapted to engage fulminate seated on the ledge at'the contracted end of the casing, and a cap adapted to snugly fit the expanded end of the casing and having its-closed end in operative relation to the corresponding end of the block, said cap being thickened or reinforced at this point to contact with the end of the block.

8. In a cartridge, :1 primer having a casing of greater internal diameter at one end than'the other and provided with an under cut shoulder at the junction of the portions of different diameter, saidcasing also being provided at its powder end with a seat or support for the reception of a charge of fulminate, ablock within said casing fitting and longitudinally movable in the portion of the casing adjacent to the powder end,

to make contact with the corresponding endof the block.

, 9. In a cartridge, a primer casing having formed integral therewlth' at one end an annular plate ,extending to the walls of the cartridge and against'which the base'end of the cartridge body abuts, saidplate being formed with a cylindrical reinforcing flange concentric with the primer casing and adapted to surround the corresponding end of the cartridge body, and a reinforcing sleeve exterior to the said reinforcing flange and corresponding end of the cartridge body and extending along the said body beyond the free end of said reinforcing flange.

10. In a cartridge, a primer casing having formed integral therewith at one end an annular plate extending to the walls of the cartridge body and against which the base end of the cartridge body abuts, said plate being formed with a cylindrical reinforcing; flange concentric with the primer casing and adapted to surround the corresponding end of the cartridge body, and an annular plate for the cartridge exterior to the primer casing and provided with a reinforcing sleeve concentric with and exterior to the sleeve on the plate on the primer casing, said reinforcing sleeve and the last named annular end plate being integrally joined and at the junction formed into a peripheral head or shoulder and the reinforcing sleeveextending along the powder chamber of the cartridge beyond the free end of the said reinforcing flange.

11. In a cartridge, a primer casing formed with an annular plate on one end thereof and extending to the exterior walls of the cartridge and against which the base end of the cartridge body abuts, said end plate be-' the powder chamber of the cartridge body exterior thereto, said sleeve having an interior bead beyond the edge of the reinforcement carried by the primer structure, and at the free end being crimped into the cartridge body.

12. In a c'artridge,-a primer having at its powder end a seat for a charge of fulmiinate, said seat having an irregular active face to facilitate the explosion of the fulminate. 4

13. In a cartridge, a-primer casing having at its powder end an annular seat for a chan s of fulminate, and a movable block within said casing adapted to engage a ful-.

lninate charge on the seat in the casing and having an annular engaging face of irregular contour.

14. In a cartridge, a primer having at its powder end an annular seat for a charge of fulminate with the engaging face of the seat of irregular contour, and a movable block in said casing adapted to engage the fulminate and having its fulminate engaging portion of irregular contour.

15. In a cartridge, a primer comprising a cylindrical casing open at each end and at its powder end formed with an inwardly directed annular ledge for the reception of fulminate, a longitudinally. movable block within said casing having one end adapted to engage fulminate carried by the powder end of the casing, said block having its engaging face of irregular contour and a hermetic closure for the other end of the casin comprising a cap held frictionally in said other end of the casing and provlded with p a button or e'nlargementon its closed end in operative relation to the correspondingend of the movable block in the casing.

Y 16. A cap for cartridges having the end wall reinforced where it is designed to receive the impact of the firing pin.

17. A cap for cartridges-having its end wall thickened to form a central, inwardly projecting button.

18. A cap for "cartridges having the end wall locally reinforced'where it is designed to receive the impact of thefiring pin.

19. In a cartridge, a primer casing formed with an annular plate on one end extending to the interior walls of the cartridge body and against which the base end of the cartridge bodyabuts, said plate being provided with a c 'lindrical reinforcing sleeve concentric with the primer casing and adapted to surround the corresponding end of the,

cartridge body, and an annular end plate for the cartridge exterior to the primer struc- I the first named sleeve and having the material thereof forced into the cartridge body adjacent to the end of the interior reinforcing sleeve remote from the end plate carry-- ing the same. 7

21. In a cartridge, a primer casing having an end plate and reinforcing sleeve thereon for housing the butt end of the cartridge body, and a reinforcing sleeve exterior to the first named sleeve and having the material thereof beaded into the cartridge body adjacent to that end of the interior reinforcmg sleeve remote from the end plate carrying the same.

In a cartridge, a primer casing having an end plate and reinforcing sleeve thereon housing the butt end of the cartridge body and a, reinforcing sleeve exterior to the first named sleeve and having the material thereof forced .into the cartridge body adjacent to that end of the interior reinforcing sleeve remote from the end plate carrying the same, the outer sleeve extending along the powder chamber of thecartridge beyond the forced in portion and at the end being crimped or upset into the body of the cartridge.

JAS. M. WALKER, E. STOMMEL.