US2703529A - Lining for perforated cartridge cases - Google Patents
Lining for perforated cartridge cases Download PDFInfo
- Publication number
- US2703529A US2703529A US771290A US77129047A US2703529A US 2703529 A US2703529 A US 2703529A US 771290 A US771290 A US 771290A US 77129047 A US77129047 A US 77129047A US 2703529 A US2703529 A US 2703529A
- Authority
- US
- United States
- Prior art keywords
- cartridge case
- lining
- case
- perforations
- film
- 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
Links
- 230000001464 adherent effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920000915 polyvinyl chloride Polymers 0.000 description 5
- 239000004800 polyvinyl chloride Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 239000002360 explosive Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 3
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 229940043265 methyl isobutyl ketone Drugs 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229920012485 Plasticized Polyvinyl chloride Polymers 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011343 solid material 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
- F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
- F42B5/02—Cartridges, i.e. cases with charge and missile
- F42B5/05—Cartridges, i.e. cases with charge and missile for recoilless guns
Definitions
- This invention relates to a lining for cartridge cases, particularly perforated cartridge cases for recoilless rifles, and a process of manufacturing such a cartridge case linin It is an object of this invention to provide a lining which affords a seal adjacent the inner end of a cartridge case surrounding the primer seat, a seal for the perforations through the side walls of the cartridge case, and a seal adjacent the open end of the cartridge case beneath the projectile carried therein.
- Fig. 1 is a side elevation with the mouth of the lining left open.
- Fig. 2 is a longitudinal cross section on an enlarged scale on line 2-2 of Fig. 1 through the wall of the cartridge case and the lining thereon.
- Fig. 3 is a transverse cross section on the same scale as Fig.2on line 33 of Fig. 1.
- a hollow tube is then force-fitted into the primer opening of a perforated cartridge case.
- the perforated cartridge case is then dipped (month end first) into the hot polyvinyl chloride admixture. This can be done by grasping the tube in the hand.
- the case is then slowly withdrawn from the admixture in a vertical position so as to secure as uniform as possible a layer of polyvinyl chloride on both the inner and outer surfaces of the cartridge case.
- the coatings on the inner and outer walls of the cartridge case coalesce or unite in the perforations on the side walls of the case sealing each of these perforations with a transparent film or pane.
- the cartridge case is only dipped into the admixture to a sufficient depth so that the films adhere to the inner and outer faces of the side wall of the cartridge case between the closed or primer end and the adjacent holes. No coating is applied to the closed or primer end through atent ice which the primer seat extends. However, the bond between the film and the side walls of the cartridge case is ample to seal this end of the cartridge case.
- the cartridge case is rotated either in a horizontal position, a vertical position, or a position with the axis of the cartridge case at an intermediate angle between the vertical and horizontal.
- the position which is selected is chosen to secure as uniform a thickness of the coating as possible. This rotation is continued until the film sets.
- the films constituting the lining are then allowed to dry in air for approximately one hour at room temperature.
- the solvent methyl-iso-butyl ketone
- the cartridge case and the lining are allowed to cool to room temperature.
- the outer layer of the lining is then cut circumferentially between the open mouth of the cartridge case and the nearest perforations. This portion of the lining is then stripped away from the wall of the cartridge case so that it forms a bag or bellows mouth projecting from the open end of the cartridge case.
- the case is then loaded with the powder or other propellent explosive which it is to contain.
- the cartridge case is sealed by stuffing the bag or bellows mouth of the lining into the open end of the cartridge case, or by causing the walls of the bag or bellows end of the cartridge case to adhere together by the use of a solvent or heat, or by tying.
- the lining of this invention provides a seal encircling the case wall between the primer seat and the nearest perforations, a seal for each of the perforations through the side wall of the cartridge case, and a seal for the lining adjacent the open or month end of the cartridge case.
- Cartridge case and lining The selected embodiment of the cartridge case and lining shown in the drawings and manufactured according to the foregoing process comprises a cylindrical cartridge case I, preferably of metal, having an open or month end 2 and a primer or closed end 3 having a perforation or primer seat 4 passing through the closed end.
- the cartridge case has a number of perforations 5 through its side walls. For simplicity, only a few of these perforations 5 are shown in Fig. 1.
- the interior of the cartridge case is covered with a layer or film 6 and the outer surface of the cartridge case is covered (except adjacent the open end 2) with a layer or film 7.
- layers or films 6 and 7 coalesce or unite to form a pane or seal 8 filling and bridging the side wall perforations 5.
- Layers or films 6 and 7 and the panes or seals 8 integral therewith afford a seal against moisture or other agents harmful to the explosive charge in the cartridge case. This seal burns when the explosive charge is fired and does not foul or otherwise damage the recoilless rifle or the cartridge case which forms a part of the ammunition therefor since the burnt film dissipates forming only a negligible residue or ash.
- the case need not be a cartridge case but may be a package or container for other materials than combustible powder.
- a cartridge case having a film of plastic material adherent to the major part of the inner face of its side wall and the outer face of its side wall and forming a bag or bellows mouth adjacent the open or month end of the cartridge case.
- a lining for a metal cartridge case comprising a layer or film of combustible material adherent to the major part of the inner face of the cartridge case side wall, a layer or film of the same material adherent to the outer face of the cartridge case and a continuation of said inner film forming a bag or bellows mouth projecting through the open end of the cartridge case.
- a lining for a perforated cartridge case for a recoilless rifle comprising, a film of flexible combustible plastic adherent to the inner surface of the cartridge case, a film of the same material adherent to the outer surface of the cartridge case and coalesced with the inner film to form a seal or pane in each of the perforations through the side wall of the cartridge case, and a portion of the inner layer extending out of the open end of the cartridge case and adapted to be sealed adjacent said open end.
- Recoilless rifle ammunition including, a cartridge case having perforations through its side walls, and a film of a resilient combustible plastic material integral with and sealing each of said perforations.
- recoilless rifle ammunition including a metallic cartridge case having perforations through its side wall, a lining comprising a seal of polyvinyl chloride integral with and closing each of said perforations.
- Ammunition for a recoilless rifle including a perforated cartridge case and a coating of polyvinyl chloride adherent to the surfaces of the side walls of said cartridge 25 case and sealing the perforations through said side walls.
- a lining for a case comprising, a layer or film of resilient plastic material adherent to the major portion of the outer face of the case and adherent to the major References Cited in the file of this patent UNITED STATES PATENTS 503,096 Mohr Aug. 8, 1893 1,669,969 Caruth May 15, 1928 1,929,453 Semon Oct. 10, 1933 2,353,934 Schreib July 18, 1944 2,379,056 Alexander June 26, 1945 2,431,684 Brophy Dec. 2, 1947 2,441,227 Pineles May 11, 1948 FOREIGN PATENTS 502,770 Great Britain Mar. 24, 1939 OTHER REFERENCES Recoil Elimination, pages 236, 237 of Army Ordnance, September-October, 1945. Published by Ann. Ordnance Assn., Penn. Avenue at 17th Street. NW., Washington 6, D. C. (Copy in 102/3 8.)
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
United States LINING FOR PERFORATED CARTRIDGE CASES Arnold J. Tuckerman, Philadelphia, Anthony Gallaccio, Havertown, and Morton Kushner, Philadelphia, Pa.
The invention described herein may be manufactured and used by or for the Government for governmental purposes without the payment of any royalty thereon.
This invention relates to a lining for cartridge cases, particularly perforated cartridge cases for recoilless rifles, and a process of manufacturing such a cartridge case linin It is an object of this invention to provide a lining which affords a seal adjacent the inner end of a cartridge case surrounding the primer seat, a seal for the perforations through the side walls of the cartridge case, and a seal adjacent the open end of the cartridge case beneath the projectile carried therein.
It is a further object of this invention to provide a lining for a cartridge case, which lining is readily applied to the case, provides a maximum of room within the case because the lining is itself a thin wall, affords improved sealing against moisture or other agents harmful to the explosive charge in the cartridge case, burns completely upon firing the round of which the cartridge case forms a part, and facilitates the manufacture of such cartridge cases because of the reduced number and simplicity of the operations involved.
For a further exposition of this invention, reference may be had to the annexed drawing and specification at the end of which the novel features of this invention will be pointed out and claimed.
In the drawings:
Fig. 1 is a side elevation with the mouth of the lining left open.
Fig. 2 is a longitudinal cross section on an enlarged scale on line 2-2 of Fig. 1 through the wall of the cartridge case and the lining thereon.
Fig. 3 is a transverse cross section on the same scale as Fig.2on line 33 of Fig. 1.
Process One example of our improved process is the following. We take a plasticized polyvinyl chloride jell dispersion and add methyl-iso-butyl ketone as a solvent until the resulting mixture has a solid content of approximately 18% by weight. Other solid materials, which may be used in place of polyvinyl chloride, are any vinyl-type plastics. Solvents, which may be used instead of the methyl-iso-butyl ketone, are other ketones, preferably those boiling at about 100 to 150 C. The above-referred to admixture is then heated to a temperature less than 95 C. until the viscosity is suitable for a solid to be readily dipped into it.
A hollow tube is then force-fitted into the primer opening of a perforated cartridge case. The perforated cartridge case is then dipped (month end first) into the hot polyvinyl chloride admixture. This can be done by grasping the tube in the hand. The case is then slowly withdrawn from the admixture in a vertical position so as to secure as uniform as possible a layer of polyvinyl chloride on both the inner and outer surfaces of the cartridge case. The coatings on the inner and outer walls of the cartridge case coalesce or unite in the perforations on the side walls of the case sealing each of these perforations with a transparent film or pane. The cartridge case is only dipped into the admixture to a sufficient depth so that the films adhere to the inner and outer faces of the side wall of the cartridge case between the closed or primer end and the adjacent holes. No coating is applied to the closed or primer end through atent ice which the primer seat extends. However, the bond between the film and the side walls of the cartridge case is ample to seal this end of the cartridge case.
Immediately after its withdrawal from the hot admixture the cartridge case is rotated either in a horizontal position, a vertical position, or a position with the axis of the cartridge case at an intermediate angle between the vertical and horizontal. The position which is selected is chosen to secure as uniform a thickness of the coating as possible. This rotation is continued until the film sets. The films constituting the lining are then allowed to dry in air for approximately one hour at room temperature. The solvent (methyl-iso-butyl ketone) is then driven off by heating the cartridge case and the lining in an oven for approximately 24 hours at a temperature of 55 C. until the lining is properly cured. Next, the cartridge case and the lining are allowed to cool to room temperature. The outer layer of the lining is then cut circumferentially between the open mouth of the cartridge case and the nearest perforations. This portion of the lining is then stripped away from the wall of the cartridge case so that it forms a bag or bellows mouth projecting from the open end of the cartridge case. The case is then loaded with the powder or other propellent explosive which it is to contain. The cartridge case is sealed by stuffing the bag or bellows mouth of the lining into the open end of the cartridge case, or by causing the walls of the bag or bellows end of the cartridge case to adhere together by the use of a solvent or heat, or by tying.
It will thus be seen that the lining of this invention provides a seal encircling the case wall between the primer seat and the nearest perforations, a seal for each of the perforations through the side wall of the cartridge case, and a seal for the lining adjacent the open or month end of the cartridge case.
The above-mentioned process is described and claimed in applicants copending divisional application, Serial No. 148,442, filed March 8, 1950.
Cartridge case and lining The selected embodiment of the cartridge case and lining shown in the drawings and manufactured according to the foregoing process comprises a cylindrical cartridge case I, preferably of metal, having an open or month end 2 and a primer or closed end 3 having a perforation or primer seat 4 passing through the closed end. For use with a recoilless rifle the cartridge case has a number of perforations 5 through its side walls. For simplicity, only a few of these perforations 5 are shown in Fig. 1. As is best seen in Figs. 2 and 3, the interior of the cartridge case is covered with a layer or film 6 and the outer surface of the cartridge case is covered (except adjacent the open end 2) with a layer or film 7. These layers or films 6 and 7 coalesce or unite to form a pane or seal 8 filling and bridging the side wall perforations 5. Layers or films 6 and 7 and the panes or seals 8 integral therewith afford a seal against moisture or other agents harmful to the explosive charge in the cartridge case. This seal burns when the explosive charge is fired and does not foul or otherwise damage the recoilless rifle or the cartridge case which forms a part of the ammunition therefor since the burnt film dissipates forming only a negligible residue or ash.
It is readily understood that many modifications of the foregoing process and article are possible within the scope of this invention. No limitation is to be implied because of the illustrative examples heretofore given or for any other reason save as the scope of appended claims express. For example, the case need not be a cartridge case but may be a package or container for other materials than combustible powder.
We claim:
1. A cartridge case having a film of plastic material adherent to the major part of the inner face of its side wall and the outer face of its side wall and forming a bag or bellows mouth adjacent the open or month end of the cartridge case.
2. A lining for a metal cartridge case comprising a layer or film of combustible material adherent to the major part of the inner face of the cartridge case side wall, a layer or film of the same material adherent to the outer face of the cartridge case and a continuation of said inner film forming a bag or bellows mouth projecting through the open end of the cartridge case.
3. A lining for a perforated cartridge case for a recoilless rifle comprising, a film of flexible combustible plastic adherent to the inner surface of the cartridge case, a film of the same material adherent to the outer surface of the cartridge case and coalesced with the inner film to form a seal or pane in each of the perforations through the side wall of the cartridge case, and a portion of the inner layer extending out of the open end of the cartridge case and adapted to be sealed adjacent said open end.
4. Recoilless rifle ammunition including, a cartridge case having perforations through its side walls, and a film of a resilient combustible plastic material integral with and sealing each of said perforations.
5. In recoilless rifle ammunition including a metallic cartridge case having perforations through its side wall, a lining comprising a seal of polyvinyl chloride integral with and closing each of said perforations.
6. Ammunition for a recoilless rifle including a perforated cartridge case and a coating of polyvinyl chloride adherent to the surfaces of the side walls of said cartridge 25 case and sealing the perforations through said side walls.
7. A lining for a case comprising, a layer or film of resilient plastic material adherent to the major portion of the outer face of the case and adherent to the major References Cited in the file of this patent UNITED STATES PATENTS 503,096 Mohr Aug. 8, 1893 1,669,969 Caruth May 15, 1928 1,929,453 Semon Oct. 10, 1933 2,353,934 Schreib July 18, 1944 2,379,056 Alexander June 26, 1945 2,431,684 Brophy Dec. 2, 1947 2,441,227 Pineles May 11, 1948 FOREIGN PATENTS 502,770 Great Britain Mar. 24, 1939 OTHER REFERENCES Recoil Elimination, pages 236, 237 of Army Ordnance, September-October, 1945. Published by Ann. Ordnance Assn., Penn. Avenue at 17th Street. NW., Washington 6, D. C. (Copy in 102/3 8.)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US771290A US2703529A (en) | 1947-08-29 | 1947-08-29 | Lining for perforated cartridge cases |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US771290A US2703529A (en) | 1947-08-29 | 1947-08-29 | Lining for perforated cartridge cases |
Publications (1)
Publication Number | Publication Date |
---|---|
US2703529A true US2703529A (en) | 1955-03-08 |
Family
ID=25091340
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US771290A Expired - Lifetime US2703529A (en) | 1947-08-29 | 1947-08-29 | Lining for perforated cartridge cases |
Country Status (1)
Country | Link |
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US (1) | US2703529A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2939392A (en) * | 1955-08-31 | 1960-06-07 | Huck Robert | Blank cartridge |
US3008412A (en) * | 1956-10-09 | 1961-11-14 | William A Merdinyan | Cartridge case for a recoilless rifle |
US3023702A (en) * | 1956-08-23 | 1962-03-06 | Phillips Petroleum Co | Rocket propellent ignition means |
US3048105A (en) * | 1957-09-03 | 1962-08-07 | Press & Stanzwerk A G | Aluminum alloy cartridge case |
US3095813A (en) * | 1961-07-05 | 1963-07-02 | Henry S Lipinski | Propellant container, plastic impregnated glass |
US3098444A (en) * | 1960-10-12 | 1963-07-23 | Lockheed Aircraft Corp | Expendable propellant casing |
US3144827A (en) * | 1962-11-19 | 1964-08-18 | John T Boutwell | Blank cartridge |
US3209689A (en) * | 1956-11-14 | 1965-10-05 | Mclennan Donald Elmore | Reduction of gun barrel wear |
US3433156A (en) * | 1966-04-21 | 1969-03-18 | Asahi Chemical Ind | Combustible blank cartridge |
US4497239A (en) * | 1981-10-05 | 1985-02-05 | Curry Hugh R | Muzzle ejecting sabot cartridge firearm system |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US503096A (en) * | 1893-08-08 | Frederik mohr | ||
US1669969A (en) * | 1926-09-22 | 1928-05-15 | William A Caruth | Gun cartridge |
US1929453A (en) * | 1932-09-17 | 1933-10-10 | Goodrich Co B F | Synthetic rubber-like composition and method of making same |
GB502770A (en) * | 1937-04-22 | 1939-03-24 | Dynamit Ag | Improvements in or relating to electric blasting fuzes |
US2353934A (en) * | 1940-12-18 | 1944-07-18 | John G Onnen | Cartridge |
US2379056A (en) * | 1943-07-20 | 1945-06-26 | Hercules Powder Co Ltd | Propellent powder |
US2431684A (en) * | 1942-10-09 | 1947-12-02 | United Shoe Machinery Corp | Method of spraying a temporary protective coating |
US2441227A (en) * | 1944-04-27 | 1948-05-11 | United Shoe Machinery Corp | Method of applying temporary protective coatings |
-
1947
- 1947-08-29 US US771290A patent/US2703529A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US503096A (en) * | 1893-08-08 | Frederik mohr | ||
US1669969A (en) * | 1926-09-22 | 1928-05-15 | William A Caruth | Gun cartridge |
US1929453A (en) * | 1932-09-17 | 1933-10-10 | Goodrich Co B F | Synthetic rubber-like composition and method of making same |
GB502770A (en) * | 1937-04-22 | 1939-03-24 | Dynamit Ag | Improvements in or relating to electric blasting fuzes |
US2353934A (en) * | 1940-12-18 | 1944-07-18 | John G Onnen | Cartridge |
US2431684A (en) * | 1942-10-09 | 1947-12-02 | United Shoe Machinery Corp | Method of spraying a temporary protective coating |
US2379056A (en) * | 1943-07-20 | 1945-06-26 | Hercules Powder Co Ltd | Propellent powder |
US2441227A (en) * | 1944-04-27 | 1948-05-11 | United Shoe Machinery Corp | Method of applying temporary protective coatings |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2939392A (en) * | 1955-08-31 | 1960-06-07 | Huck Robert | Blank cartridge |
US3023702A (en) * | 1956-08-23 | 1962-03-06 | Phillips Petroleum Co | Rocket propellent ignition means |
US3008412A (en) * | 1956-10-09 | 1961-11-14 | William A Merdinyan | Cartridge case for a recoilless rifle |
US3209689A (en) * | 1956-11-14 | 1965-10-05 | Mclennan Donald Elmore | Reduction of gun barrel wear |
US3048105A (en) * | 1957-09-03 | 1962-08-07 | Press & Stanzwerk A G | Aluminum alloy cartridge case |
US3098444A (en) * | 1960-10-12 | 1963-07-23 | Lockheed Aircraft Corp | Expendable propellant casing |
US3095813A (en) * | 1961-07-05 | 1963-07-02 | Henry S Lipinski | Propellant container, plastic impregnated glass |
US3144827A (en) * | 1962-11-19 | 1964-08-18 | John T Boutwell | Blank cartridge |
US3433156A (en) * | 1966-04-21 | 1969-03-18 | Asahi Chemical Ind | Combustible blank cartridge |
US4497239A (en) * | 1981-10-05 | 1985-02-05 | Curry Hugh R | Muzzle ejecting sabot cartridge firearm system |
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