US39844A - Improvement in gas-checks for breech-loading fire-arms - Google Patents
Improvement in gas-checks for breech-loading fire-arms Download PDFInfo
- Publication number
- US39844A US39844A US39844DA US39844A US 39844 A US39844 A US 39844A US 39844D A US39844D A US 39844DA US 39844 A US39844 A US 39844A
- Authority
- US
- United States
- Prior art keywords
- gas
- breech
- arms
- checks
- improvement
- 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
- 229920000591 gum Polymers 0.000 description 16
- 239000000843 powder Substances 0.000 description 12
- 229920001971 elastomer Polymers 0.000 description 8
- 239000005995 Aluminium silicate Substances 0.000 description 2
- PZZYQPZGQPZBDN-UHFFFAOYSA-N Aluminium silicate Chemical compound O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 description 2
- 240000002027 Ficus elastica Species 0.000 description 2
- 239000000899 Gutta-Percha Substances 0.000 description 2
- 229920000588 Gutta-percha Polymers 0.000 description 2
- 210000001503 Joints Anatomy 0.000 description 2
- 210000000088 Lip Anatomy 0.000 description 2
- 240000000342 Palaquium gutta Species 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000004059 degradation Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920001195 polyisoprene Polymers 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A3/00—Breech mechanisms, e.g. locks
- F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
- F41A3/74—Obturating or packing devices for gas leak prevention in breech mechanisms
Definitions
- This invention consists, 'first, in combining the gum with an incombustible powder before vulcanization; and, secondly, in molding it into a shape resembling a cup or a saucer, vulcanizing it, and attaching it with base to the breech, and using it in the gun as a gas-choke, without the covering from the fire, as in N. S.
- This invention has for its object, first, the greater simplicity of parts and cheapness of con struction; and, second, the superiority of the mechanical arrangement.
- the reasons for the first are evident at a glance.
- the reasons for the second are somewhat as follows:
- the hinge-pin may be nearer the barrel. In loading with imperfect cartridges, if the paper lags out of the barrel or grains of powder be in the way, this rubber or gum will wipe it up or overlie it harmlessly, and retain the gas as well. It is well established that the vent, especially in cannon, should be axial. It can hardly be so in Mr. Olementss arrangement.
- the applicability to different sorts of ammunition-the metallic cartridge-case having to be fixed axially-the cartridge may be mechanically pierced by the inner end of the vent, to insure better ignition; and the vent should always be in the breech-piece of cannon, for the purpose of spiking the gun by withdrawing the breech and removing it.
- I In preparing the gum I consider the size of the gun. Asmall arm requires the more pliability, a large one the more obduracy, to fire.
- I take any incombustible powder as, for instance, the earths talc, plaster, kaolin, blacklead, or any other that is unchanged by heatand knead it with the plastic gum in such pro portion as I wantfro1n one of powder and I eight of gum, by weight, which gives a pliable gum, to one of powder and one of gum, which makes an obdurate gum.
- the earthy powder acts as a partial shield against the fire, and although it permits the degradation of the gas choke, it causes it to last six (6) times as long as without it.
- Figures 1 and 2 show the gun
- Fig. 3 is a plan of the gas-choke.
- G is the gun.
- A is the breech.
- O is the chamber of the gun.
- H is the hole through which the breechissues and enters.
- V is the vent, and V its inner end, delivering the fire axially.
- N is a metallic open ring for supporting the rubber M. N and M are attached to the breech and work with it. The powder-gas, spreading from V in C, presses the lip of M against the sides of C and chokes the gas, while its destruction by a single fire is imperceptible.
Description
' J. 0. SYMMES Breech-Loading Ordnance.
Patented Sept. 8. 1863.
UNITED STATES PATENT OFFICE.
JOHN C. SYMME$, OF UNITED STATES ORDNANOE CORPS.
IMPROVEMENT IN GAS-CHECKS FOR BREECH-LOADING FIRE-ARMS.
Specification forming part of Letters Patent No. 39,844, dated Sept-embrr 8, 1863; antedated December 25, 1862.
To all whom it may concern Be it known that I, JNo. OLEvEsSYMMEs, of the Ordnance Corps, have invented certain improvements in the method of packing joints against the extrusion of powder-gas in fire-arms, by means of india rubber, gutta percha, or other like gums; and I hereby declare the following to be a true and exact description of the same, reference being had to the drawings and model accompanying this specification.
This invention consists, 'first, in combining the gum with an incombustible powder before vulcanization; and, secondly, in molding it into a shape resembling a cup or a saucer, vulcanizing it, and attaching it with base to the breech, and using it in the gun as a gas-choke, without the covering from the fire, as in N. S.
Clementss patent of May, 1856.
This invention has for its object, first, the greater simplicity of parts and cheapness of con struction; and, second, the superiority of the mechanical arrangement. The reasons for the first are evident at a glance. The reasons for the second are somewhat as follows: The hinge-pin (see model) may be nearer the barrel. In loading with imperfect cartridges, if the paper lags out of the barrel or grains of powder be in the way, this rubber or gum will wipe it up or overlie it harmlessly, and retain the gas as well. It is well established that the vent, especially in cannon, should be axial. It can hardly be so in Mr. Olementss arrangement. The applicability to different sorts of ammunition-the metallic cartridge-case having to be fixed axially-the cartridge may be mechanically pierced by the inner end of the vent, to insure better ignition; and the vent should always be in the breech-piece of cannon, for the purpose of spiking the gun by withdrawing the breech and removing it.
In preparing the gum I consider the size of the gun. Asmall arm requires the more pliability, a large one the more obduracy, to fire. I take any incombustible powder as, for instance, the earths talc, plaster, kaolin, blacklead, or any other that is unchanged by heatand knead it with the plastic gum in such pro portion as I wantfro1n one of powder and I eight of gum, by weight, which gives a pliable gum, to one of powder and one of gum, which makes an obdurate gum. The earthy powder acts as a partial shield against the fire, and although it permits the degradation of the gas choke, it causes it to last six (6) times as long as without it.
To exemplify my meaning, the sketch of a breech-loading cannon is given, using the exposed rubber.
Figures 1 and 2 show the gun, and Fig. 3 is a plan of the gas-choke.
G is the gun. A is the breech. O is the chamber of the gun. H is the hole through which the breechissues and enters. V is the vent, and V its inner end, delivering the fire axially. N is a metallic open ring for supporting the rubber M. N and M are attached to the breech and work with it. The powder-gas, spreading from V in C, presses the lip of M against the sides of C and chokes the gas, while its destruction by a single fire is imperceptible.
I claim, therefore, as follows:
1. Making the gas-choke of the form and using it in the manner substantially set forth.
2. Making the gas-choke largely fireproof, substantially as set forth.
I wish to disclaim distinctly being the original inventor of the rubber gas-choke.
JNO. CLEVES SYMMES.
\Vitnesses:
JOSEPH TONKS, ALBERT F. URBAN.
Publications (1)
Publication Number | Publication Date |
---|---|
US39844A true US39844A (en) | 1863-09-08 |
Family
ID=2109415
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US39844D Expired - Lifetime US39844A (en) | Improvement in gas-checks for breech-loading fire-arms |
Country Status (1)
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US (1) | US39844A (en) |
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- US US39844D patent/US39844A/en not_active Expired - Lifetime
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