US2894456A - Shot shells - Google Patents
Shot shells Download PDFInfo
- Publication number
- US2894456A US2894456A US561005A US56100556A US2894456A US 2894456 A US2894456 A US 2894456A US 561005 A US561005 A US 561005A US 56100556 A US56100556 A US 56100556A US 2894456 A US2894456 A US 2894456A
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- United States
- Prior art keywords
- shot
- shell
- shells
- resin
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 229910052751 metal Inorganic materials 0.000 description 17
- 239000002184 metal Substances 0.000 description 17
- 229920005989 resin Polymers 0.000 description 15
- 239000011347 resin Substances 0.000 description 15
- 239000002657 fibrous material Substances 0.000 description 9
- 230000003014 reinforcing effect Effects 0.000 description 9
- 239000000843 powder Substances 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 6
- 238000000605 extraction Methods 0.000 description 5
- 229920003002 synthetic resin Polymers 0.000 description 5
- 239000000057 synthetic resin Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 238000010304 firing Methods 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003380 propellant Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- KUBDPQJOLOUJRM-UHFFFAOYSA-N 2-(chloromethyl)oxirane;4-[2-(4-hydroxyphenyl)propan-2-yl]phenol Chemical compound ClCC1CO1.C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 KUBDPQJOLOUJRM-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229920004934 Dacron® Polymers 0.000 description 1
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 1
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000011093 chipboard Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- -1 diphenylol propane Chemical compound 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B7/00—Shotgun ammunition
- F42B7/02—Cartridges, i.e. cases with propellant charge and missile
- F42B7/04—Cartridges, i.e. cases with propellant charge and missile of pellet type
Definitions
- This invention relates to shot shells and particularly to improved shot shells provided with a metallic case sucin many instances to expand the powder chamber portion of metal shot shells, such as of brass or aluminum,which have been available heretofore.
- Such shells are externally bulged to a sufficient extent so as to make it difficult to extract the case from a gun barrel in which the shell has been fired.
- a further object is to provide metal shot shells so reinforced as to avoid functional-failures, such as extraction difficulties which characterized-prior metal shot shells.
- Fig. l is a side elevation, partly in section, of a shot shell in accordance with this invention.
- Fig. 2 is a side elevation, partly in section, of another embodiment of a shot shell in accordance with this invention.
- Fig. 3 is a fragmentary, sectional view in a greatly magnified scale of a portion of the shot shell powder chamber wall of Fig. 1;
- Fig. 4 is a fragmentary, sectional view of an alternative closure for the shot shell of Fig. 1.
- the shot shell forming an illustrative embodiment of the invention comprises a metal tube 1 containing a conventional primer assembly 2, propellant charge 3, and shot charge 4.
- gun wad assembly consisting preferably of a cup wad 5 in accordance with U.S. Patent 2,582,124 and two cylindrical wads 6 in accordance with U.S. Patent 2,628,560 is provided between the propellant and shot charges.
- the powder chamber portion of tube 1 is provided with an external reinforcing layer 7, to be described in detail hereinafter, comprising fibrous material .bonded with a synthetic resin, which imparts adequate bulge resistance to the shot shell when fired in a shotgun.
- the closure 8 of the shot shell may be formed by turning the end inwardly after first providing six inward folds or slits spaced equally around the circumference of the end of the shell.
- the tube 1 is preferably formed of aluminum by an extrusion operation, for example, in accordance with the process of U.S. Patent 2,630,916, followed by a drawing step and then, by formation of the shell base and piercing of the opening for the primer flash. During or following these operations, the upper part 9 of the tube intended to contain the shot charge is expanded somewhat so as to provide the lower powder chamber portion 10 adequately recessed so that a smooth outer cylindrical wall results after the application of the reinforcing layer 1.
- the reinforcing layer is preferably formed of a suitable high strength fiber coated with a synthetic. resin binder, wound in superposed layers and treated so as to form a composite reinforcing layer.
- Glass fibers are particularly suitable as the high strength fiber, for example, Egg-lSO-l/O Fiberglas, a commercial glass fiber furnished ,by Owens-Corning Fibergl-as Corporation in continuous lengths of yarn consisting of eight strands, each strand consisting of 204 filaments having an average diameter of 0.00038 inch.
- a preferred synthetic resin binder is an epoxy resin, a condensation product of epichlorohydrin and a polyhydric alcohol, particularly diphenylol propane, as such resins are convenient to handle and apply and exhibit desirablestrength after curf ing as well as strong adhesion to the fibrous material and metal.
- the reinforced shot shell may; be prepared byzfirst coating the outside of the lower portion 10 of the tube with the resin and windingresin-coated yarn, in adjacent turns and successive layers back and forth, to the-desired thickness. Before being coated with resin as by .a dipping or brushing process, the yarn is dehydrated thoroughly, for example by heating for two hours at a tern-f perature of about 400 F. It is also desirable-that the yarn be of the type in which each filament was provided at the time of manufacture with a standardcoating of a chromium complex for protectiongagainst;mois ture, for lubrication during handling and for promoting wetting by and adhesion to the resin binder. -The-,wind-.
- ing is conveniently accomplished by rotating, the tubes; in suitable fixtures, with the yarn being maintainedunde'r tension and While an excess of resinis supplied ,When the layer has been built up to the desired t ickness, excess resin beyond that required to leave a thin external film over the layer is removed, the tube is wrapped tightly in a suitable fih'n, as of polyvinyl alcohol, and
- the conditions of cure are chosen in accordance with the amount and type of amino catalyst, a half-hour treatment at 250 F. being adequate with an active catalyst, while a less active one requires treatment for an hour or two at 300-400 F.
- the covering film may be removed and the jacket sanded and polished.
- the metal side wall may have a thickness of 0.02 inch and the reinforcing layer 7 a 3 maximum thickness of 0.030 to 0.035 inch.
- the side wall is provided with a slight taper, the shell diameter at the mouth being slightly smaller than at the base.
- the assembly is completed by inserting the primer, 2, and loading in turn the powder charge 3,, cup wad 5, cylindrical wads 6 and shot 4.
- the closure 8 may then be formed by creasing the shell rim inwardly at six equidistant points and pressing the folds together by means of a crimping toolhaving the desired configuration.
- FIG. 4 Another type of closures may be used, for example as shown in Fig. 4, wherein a cardboard disc top wad 14 is retained in position by an inward roll crimp 15 of the shell rim.
- FIG. 2 A shot shell of somewhat modified construction in accordance with the invention is shown in Fig. 2, wherein the reinforcing layer 7 of fiber and synthetic resin extends over substantially the entire length of the shell.
- a tube of aluminum, brass or other suitable'metal may be prepared by drawing a cup made by extrusion or conventional drawing operations and then subjecting it to the usual finishing steps of trimming, heading and piercing the primer flash opening.
- the metal tube is substantially cylindrical, having a wall thickness of about 0.02 inch at the center of the shell, gradually thickening toward the base and becoming thinner toward the rim which is about 0.01 inch thick.
- the external diameter is slightly less at the rim than at the base.
- the shot shell in accordance with Fig. 2 is loaded as described above with respect to the shell of Fig. l with the exception thatthe closure consists of a thin paper disc 13 placed over the shot column and a superposed seal 16.
- the latter may consist of a mixture of about equal parts by weight of finely divided asbestos and an epoxy resin containing a highly active amino catalyst. The mixture is poured in place and quickly hardens at a temperature somewhat above ordinary room temperatures to result in a seal which disintegrates into fine fragments when the shell is fired.
- An alternative frangible closure which may be used instead of the above consists of a chipboard disc which has been impregnated with an aqueous solution of sodium silicate and dried, as described in US. Patent 2,582,125.
- Layer 7 may be applied as above described in connection with the embodiment of Fig. 1 to provide a reinforcing layer of 0.030 to 0.035 inch.
- layer 7 may be formed by providing the fibrous material as a. piece of woven fabric saturated with the resin binder, coiling the same convolutely around the metal tube, and curing so as to produce a tightly adhered composite jacket.
- the fibrous material may be provided in tape form saturated with resin, helically wound back and forth with successive turns overlapping, so that after curing a strong well-adhered reinforcing layer results.
- a woven seamless tube of the fibrous material may be saturated with resin, inserted in place over the metal shell, and the assembly subjected to curing conditions.
- the required extent of shrinkage is controlled by initially incorporating the appropriate proportion of solvent with the resin.
- glass 'fibers are the preferred fibrous material, advantageous results may also be secured with other mineral fibers and synthetic fibers, such as high strength rayon, nylon, Dacron, polyvinylidene chloride or polyacrylonitrile.
- other synthetic resins may be employed advantageously, particularly the polymerizable unsaturated esters such as allyl phthalate resins, polyamides, silicones and phenolics.
- the resulting reinforcing layers after the application of the fibrous material and resin binder to the metal tube of the shot shell and after the resin has been set or cured has a structure as represented in the enlarged sectional view of Fig. 3.
- Individual filaments 11 of the fibrous material are firmly embedded in a matrix of set resin, a thin layer 12 of which is strongly adhered to the exterior wall of the metal tube. Also, a thin layer of the resin constitutes the outer surface of the composite jacket.
- shot shells assembled in accordance with this invention have displayed uniformly satisfactory functioning in all respects when fired in shotguns.
- they can be fired in unbroken series in various automatic shotguns without extraction or other difliculties.
- Measurements made on shells before and after firing have shown the absence of any substantial bulging in contrast to the expansion encountered in the firing of aluminum or other metal shells having the same over-all configuration. Such bulging has been responsible for shells sticking in the gun barrels and causing the jamming of automatic shotguns.
- Such difficulties have 'been overcome by shot shells prepared in accordance with this invention.
- a shotshell cartridge comprising a thin-walled metal case, a charge of powder disposed in the base end of the case, a charge of shot disposed in the opposite end of the case and a jacket formed of a plurality of glass fibers bonded to each other and to the case in mutual stress-transmitting relation covering the end of the case in which the powder is received, the wall of said base end of the case being offset inwardly with respect to the wallof the end thereof receiving the shot charge so that the jacket blends with the case to define a straightsided surface on the exterior of the composite shotshell wall.
Description
' July 14,1959
J. M. ou
SHOT SHELLS Filed Jan. 24, 1956 a W M mm M zlv 4 6 7 5 I 5 9 M aw 11 \\\b h bobobwnvo 4 4 M 2 Hu m G I H I 1 MM U :Elgizll5:5:v55; F m A M H 1 0M "ATTORNEYS t tes 7 SHOT SHELLS John M. Olin, Alton, 111., assignor to Olin Mathieson Chemical Corporation, New Haven, Conn., a corporation of Virginia Application January 24, 1956, Serial No. 561,005
l'claim. (Cl. 1112-42 This invention relates to shot shells and particularly to improved shot shells provided with a metallic case sucin many instances to expand the powder chamber portion of metal shot shells, such as of brass or aluminum,which have been available heretofore. Such shells are externally bulged to a sufficient extent so as to make it difficult to extract the case from a gun barrel in which the shell has been fired. While extraction may be carried out in handoperated guns even when the case has bulged by exerting more or less force as required, a serious problem exists in attempting to use such shot shells in certain automatic shotguns.v It has not been feasible to adjust the automatic extraction devices thereof so as to extract con-v sistently such metal cases as have acquired a significant bulge as a result of firing. Increasing the extracting force does not provide a solution, as the extractor can then merely cut through the rim of any fired shell which firmly held. inthe gun barrel because of extreme bulging or pass over the rim. An extraction failure in an auto-. matic shotgun results in jamming of the gun when the feeding of the n'ext'shell is attempted.
It is the main object of this invention to provide improved shot shells characterized by having a metal case which is-reinforced against bulging. A further object is to provide metal shot shells so reinforced as to avoid functional-failures, such as extraction difficulties which characterized-prior metal shot shells.
In accordance with this invention, the above and other objectives are achieved by the provision of metal shot sh'ells'in which at least'the powder chamber portion is reinforced by an external layer o'f'fib rous material embedded in a synthetic resin. Such shells have been found a to display excellentfunctioningin; all respects including trouble-free operation in automaticshotguns n In the drawings forming 'part of this specification:
Fig. l is a side elevation, partly in section, of a shot shell in accordance with this invention;
Fig. 2 is a side elevation, partly in section, of another embodiment of a shot shell in accordance with this invention;
Fig. 3 is a fragmentary, sectional view in a greatly magnified scale of a portion of the shot shell powder chamber wall of Fig. 1; and
Fig. 4 is a fragmentary, sectional view of an alternative closure for the shot shell of Fig. 1.
Referring to Fig. l of the drawing, the shot shell forming an illustrative embodiment of the invention comprises a metal tube 1 containing a conventional primer assembly 2, propellant charge 3, and shot charge 4. A
f 2,894,456 Patented July 14,1959
ICC
gun wad assembly consisting preferably of a cup wad 5 in accordance with U.S. Patent 2,582,124 and two cylindrical wads 6 in accordance with U.S. Patent 2,628,560 is provided between the propellant and shot charges.
The powder chamber portion of tube 1 is provided with an external reinforcing layer 7, to be described in detail hereinafter, comprising fibrous material .bonded with a synthetic resin, which imparts adequate bulge resistance to the shot shell when fired in a shotgun. The closure 8 of the shot shell may be formed by turning the end inwardly after first providing six inward folds or slits spaced equally around the circumference of the end of the shell.
The tube 1 is preferably formed of aluminum by an extrusion operation, for example, in accordance with the process of U.S. Patent 2,630,916, followed by a drawing step and then, by formation of the shell base and piercing of the opening for the primer flash. During or following these operations, the upper part 9 of the tube intended to contain the shot charge is expanded somewhat so as to provide the lower powder chamber portion 10 adequately recessed so that a smooth outer cylindrical wall results after the application of the reinforcing layer 1.
The reinforcing layer is preferably formed of a suitable high strength fiber coated with a synthetic. resin binder, wound in superposed layers and treated so as to form a composite reinforcing layer. Glass fibers are particularly suitable as the high strength fiber, for example, Egg-lSO-l/O Fiberglas, a commercial glass fiber furnished ,by Owens-Corning Fibergl-as Corporation in continuous lengths of yarn consisting of eight strands, each strand consisting of 204 filaments having an average diameter of 0.00038 inch. A preferred synthetic resin binder is an epoxy resin, a condensation product of epichlorohydrin and a polyhydric alcohol, particularly diphenylol propane, as such resins are convenient to handle and apply and exhibit desirablestrength after curf ing as well as strong adhesion to the fibrous material and metal. The epoxy resin sold by Shell Chemical Corporation under the name Epon 828 mixed with several percent by weight of an amino catalyst and thinned, by about five percent by weight of xylene hasbeenfound particularly. effective. p 1, l
The reinforced shot shell may; be prepared byzfirst coating the outside of the lower portion 10 of the tube with the resin and windingresin-coated yarn, in adjacent turns and successive layers back and forth, to the-desired thickness. Before being coated with resin as by .a dipping or brushing process, the yarn is dehydrated thoroughly, for example by heating for two hours at a tern-f perature of about 400 F. It is also desirable-that the yarn be of the type in which each filament was provided at the time of manufacture with a standardcoating of a chromium complex for protectiongagainst;mois ture, for lubrication during handling and for promoting wetting by and adhesion to the resin binder. -The-,wind-. ing is conveniently accomplished by rotating, the tubes; in suitable fixtures, with the yarn being maintainedunde'r tension and While an excess of resinis supplied ,When the layer has been built up to the desired t ickness, excess resin beyond that required to leave a thin external film over the layer is removed, the tube is wrapped tightly in a suitable fih'n, as of polyvinyl alcohol, and
cured. The conditions of cure are chosen in accordance with the amount and type of amino catalyst, a half-hour treatment at 250 F. being adequate with an active catalyst, while a less active one requires treatment for an hour or two at 300-400 F. After being cooled to room temperature, the covering film may be removed and the jacket sanded and polished.
In the completed shell, the metal side wall may have a thickness of 0.02 inch and the reinforcing layer 7 a 3 maximum thickness of 0.030 to 0.035 inch. As custom ary with shot shells, the side wall is provided with a slight taper, the shell diameter at the mouth being slightly smaller than at the base. The assembly is completed by inserting the primer, 2, and loading in turn the powder charge 3,, cup wad 5, cylindrical wads 6 and shot 4. The closure 8 may then be formed by creasing the shell rim inwardly at six equidistant points and pressing the folds together by means of a crimping toolhaving the desired configuration.
Other types of closures may be used, for example as shown in Fig. 4, wherein a cardboard disc top wad 14 is retained in position by an inward roll crimp 15 of the shell rim.
A shot shell of somewhat modified construction in accordance with the invention is shown in Fig. 2, wherein the reinforcing layer 7 of fiber and synthetic resin extends over substantially the entire length of the shell. As in the embodiment shown in Fig. 1, a tube of aluminum, brass or other suitable'metal may be prepared by drawing a cup made by extrusion or conventional drawing operations and then subjecting it to the usual finishing steps of trimming, heading and piercing the primer flash opening. In this instance, the metal tube is substantially cylindrical, having a wall thickness of about 0.02 inch at the center of the shell, gradually thickening toward the base and becoming thinner toward the rim which is about 0.01 inch thick. The external diameter is slightly less at the rim than at the base.
The shot shell in accordance with Fig. 2 is loaded as described above with respect to the shell of Fig. l with the exception thatthe closure consists of a thin paper disc 13 placed over the shot column and a superposed seal 16. The latter may consist of a mixture of about equal parts by weight of finely divided asbestos and an epoxy resin containing a highly active amino catalyst. The mixture is poured in place and quickly hardens at a temperature somewhat above ordinary room temperatures to result in a seal which disintegrates into fine fragments when the shell is fired. An alternative frangible closure which may be used instead of the above consists of a chipboard disc which has been impregnated with an aqueous solution of sodium silicate and dried, as described in US. Patent 2,582,125.
According to a further variation, a woven seamless tube of the fibrous material may be saturated with resin, inserted in place over the metal shell, and the assembly subjected to curing conditions. In this case, the required extent of shrinkage is controlled by initially incorporating the appropriate proportion of solvent with the resin.
While glass 'fibers are the preferred fibrous material, advantageous results may also be secured with other mineral fibers and synthetic fibers, such as high strength rayon, nylon, Dacron, polyvinylidene chloride or polyacrylonitrile. Although best results have been obtained with epoxy resin binders, other synthetic resins may be employed advantageously, particularly the polymerizable unsaturated esters such as allyl phthalate resins, polyamides, silicones and phenolics.
The resulting reinforcing layers after the application of the fibrous material and resin binder to the metal tube of the shot shell and after the resin has been set or cured has a structure as represented in the enlarged sectional view of Fig. 3. Individual filaments 11 of the fibrous material are firmly embedded in a matrix of set resin, a thin layer 12 of which is strongly adhered to the exterior wall of the metal tube. Also, a thin layer of the resin constitutes the outer surface of the composite jacket.
The above-described shot shells assembled in accordance with this invention have displayed uniformly satisfactory functioning in all respects when fired in shotguns. In particular, they can be fired in unbroken series in various automatic shotguns without extraction or other difliculties. Measurements made on shells before and after firing have shown the absence of any substantial bulging in contrast to the expansion encountered in the firing of aluminum or other metal shells having the same over-all configuration. Such bulging has been responsible for shells sticking in the gun barrels and causing the jamming of automatic shotguns. Such difficulties have 'been overcome by shot shells prepared in accordance with this invention.
I claim:
A shotshell cartridge comprising a thin-walled metal case, a charge of powder disposed in the base end of the case, a charge of shot disposed in the opposite end of the case and a jacket formed of a plurality of glass fibers bonded to each other and to the case in mutual stress-transmitting relation covering the end of the case in which the powder is received, the wall of said base end of the case being offset inwardly with respect to the wallof the end thereof receiving the shot charge so that the jacket blends with the case to define a straightsided surface on the exterior of the composite shotshell wall.
References Cited in the file of this patent UNITED STATES PATENTS OTHER REFERENCES Jet Propulsion publication, vol. 26, No; 11, November 1956, pp. 969-972. (Copy in Div. 10.)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US561005A US2894456A (en) | 1956-01-24 | 1956-01-24 | Shot shells |
ES0230775A ES230775A1 (en) | 1956-01-24 | 1956-09-06 | Shot shells |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US561005A US2894456A (en) | 1956-01-24 | 1956-01-24 | Shot shells |
Publications (1)
Publication Number | Publication Date |
---|---|
US2894456A true US2894456A (en) | 1959-07-14 |
Family
ID=24240262
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US561005A Expired - Lifetime US2894456A (en) | 1956-01-24 | 1956-01-24 | Shot shells |
Country Status (2)
Country | Link |
---|---|
US (1) | US2894456A (en) |
ES (1) | ES230775A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3058420A (en) * | 1960-04-26 | 1962-10-16 | Canadian Ind | Slug-loaded shotgun cartridge |
US3127837A (en) * | 1961-04-27 | 1964-04-07 | Driaire Inc | Shot shell construction |
US3144827A (en) * | 1962-11-19 | 1964-08-18 | John T Boutwell | Blank cartridge |
US3162125A (en) * | 1961-07-25 | 1964-12-22 | Olin Mathieson | Propellent cartridge |
US4815389A (en) * | 1987-07-31 | 1989-03-28 | Remington Arms Company | Shot cartridge |
US20190293395A1 (en) * | 2018-03-21 | 2019-09-26 | Gil Yonashiro | Handgun Shot Shell |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US123352A (en) * | 1872-02-06 | Improvement in cartridges for breech-loading fire-arms | ||
US2232634A (en) * | 1935-08-12 | 1941-02-18 | Roberts Horace Ainley | Shotgun cartridge |
US2539404A (en) * | 1945-05-28 | 1951-01-30 | Aerojet Engineering Corp | Solid propellant charge for rocket motors |
US2792324A (en) * | 1954-11-24 | 1957-05-14 | Specialties Dev Corp | Method of manufacturing hollow articles composed of resin impregnated yarn windings |
-
1956
- 1956-01-24 US US561005A patent/US2894456A/en not_active Expired - Lifetime
- 1956-09-06 ES ES0230775A patent/ES230775A1/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US123352A (en) * | 1872-02-06 | Improvement in cartridges for breech-loading fire-arms | ||
US2232634A (en) * | 1935-08-12 | 1941-02-18 | Roberts Horace Ainley | Shotgun cartridge |
US2539404A (en) * | 1945-05-28 | 1951-01-30 | Aerojet Engineering Corp | Solid propellant charge for rocket motors |
US2792324A (en) * | 1954-11-24 | 1957-05-14 | Specialties Dev Corp | Method of manufacturing hollow articles composed of resin impregnated yarn windings |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3058420A (en) * | 1960-04-26 | 1962-10-16 | Canadian Ind | Slug-loaded shotgun cartridge |
US3127837A (en) * | 1961-04-27 | 1964-04-07 | Driaire Inc | Shot shell construction |
US3162125A (en) * | 1961-07-25 | 1964-12-22 | Olin Mathieson | Propellent cartridge |
US3144827A (en) * | 1962-11-19 | 1964-08-18 | John T Boutwell | Blank cartridge |
US4815389A (en) * | 1987-07-31 | 1989-03-28 | Remington Arms Company | Shot cartridge |
US20190293395A1 (en) * | 2018-03-21 | 2019-09-26 | Gil Yonashiro | Handgun Shot Shell |
Also Published As
Publication number | Publication date |
---|---|
ES230775A1 (en) | 1957-03-16 |
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