US1308343A - Smokeless powder and process of coating same - Google Patents
Smokeless powder and process of coating same Download PDFInfo
- Publication number
- US1308343A US1308343A US1308343DA US1308343A US 1308343 A US1308343 A US 1308343A US 1308343D A US1308343D A US 1308343DA US 1308343 A US1308343 A US 1308343A
- Authority
- US
- United States
- Prior art keywords
- smokeless powder
- coating
- powder
- smokeless
- coating same
- 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
- 239000000843 powder Substances 0.000 title description 32
- 239000011248 coating agent Substances 0.000 title description 24
- 238000000576 coating method Methods 0.000 title description 24
- 238000000034 method Methods 0.000 title description 12
- 239000000203 mixture Substances 0.000 description 20
- 239000004615 ingredient Substances 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 14
- 239000008188 pellet Substances 0.000 description 14
- 230000001050 lubricating Effects 0.000 description 12
- 239000002904 solvent Substances 0.000 description 12
- 239000000020 Nitrocellulose Substances 0.000 description 10
- 229920001220 nitrocellulos Polymers 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 229910002804 graphite Inorganic materials 0.000 description 8
- 239000010439 graphite Substances 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000002360 explosive Substances 0.000 description 4
- 230000002093 peripheral Effects 0.000 description 4
- 230000000979 retarding Effects 0.000 description 4
- 229920002456 HOTAIR Polymers 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 239000008199 coating composition Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000001141 propulsive Effects 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 241000894007 species Species 0.000 description 2
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B45/00—Compositions or products which are defined by structure or arrangement of component of product
- C06B45/12—Compositions or products which are defined by structure or arrangement of component of product having contiguous layers or zones
Definitions
- FRANCIS I DU PONT, OF WILMINGTON, DELAWARE, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO BALL GRAIN EXPLOSIVES COMPANY, OF WILMINGTON, DELA- WARE, A CORPORATION OF DELAWARE.
- the separate grains are in the form of cylindrically shaped pellets. These pellets are axially perforated so that combustion may take lace from the center outwardly in a radial direction as well as from the outer Wall toward the center. It is also this has resulted in retarding combustion and seriously reducing the propulsive power of the gases.
- the object of my invention is to apply a protective coating to the peripheral wall of the pellet of such slow burning composition as to cause the combustion to proceed more rapidly from the center outwardly than from the outer surface inwardly and at the same-time to release a inaterial which has a lubricating action upon the bore of the gun.
- Figure 1 is an elevation, partly in section and somewhat enlarged, of such apparatus.
- Fig. 2 is a longitudinal sectional view, greatly magnified, of one of the completed smokeless powder grains.
- the powder from which the grains are formed which is of any standard composition, is placed in a press a having in its bottom a perforated plate I) below which is an orifice c of a diameter at its outlet bearing the proper relation to the diameter of the grains to be ultimately formed.
- a pin d is
- a tank e is provided containing my improved coating composition above described, and the powder string :12, by means of rollers g and h i fed into, through and out of the bath, causing the string to be superficially coated with a retarding and lubricating. coating.
- the string may be subjected, at the point i as indicated by the arrows, to a current of hot air in order to drive off the solvent and dry the coating.
- a pipe may be arranged with a suction to convey the vapors to an apparatus to recovera portion of the solvent. Subsequently the string is cut 'into separate grains in the manner well known in the art.
- FIG. 2 A finished single grain or pellet is shown in Fig. 2 in which 3 represents the main body of smokeless powder and z the coating of nitrocellulose and unctuous graphite.
- smokeless powder grain having a relatively quick burning body and an exterior coat- Patented uly 1, 1919.
- the proc'ess which consists coating smokeless powder with a relatively slow burning composition comprising an explosive ingredient, a substance having a lubricating quality, and a solventof the first ingredient.
Description
F.. I. DU FONT. SMOKELESS POWDER AND PROCESS OF COATING SAME.
APPLICATION FILED MAYZ. 1916.
' PatentedJuly 1, 1919.
Hag c115 [041 UNITED s'r 'rEs PATENT OFFICE.
FRANCIS I. DU PONT, OF WILMINGTON, DELAWARE, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO BALL GRAIN EXPLOSIVES COMPANY, OF WILMINGTON, DELA- WARE, A CORPORATION OF DELAWARE.
SMOKELESS POWDER AND PROCESS OF COATING SAME.
Specification of Letters Patent.
- Application filed May 2, 1916. Serial No. 94,945.
To all whom it may concern:
Be it known that I, FRANCIS I. DU Form, a citizen of the United States, residing at lVilmington, county of New Castle, and State of Delaware, have invented a new and useful Improvement in Smokeless Powder and Processes of Coating Same, of,
which the following is a full, clear, and exact description, reference'being had to the accompanyin drawings, which form a part of this speci cation.
In the manufacture of smokeless rifle powder, the separate grains are in the form of cylindrically shaped pellets. These pellets are axially perforated so that combustion may take lace from the center outwardly in a radial direction as well as from the outer Wall toward the center. It is also this has resulted in retarding combustion and seriously reducing the propulsive power of the gases. v
The object of my invention is to apply a protective coating to the peripheral wall of the pellet of such slow burning composition as to cause the combustion to proceed more rapidly from the center outwardly than from the outer surface inwardly and at the same-time to release a inaterial which has a lubricating action upon the bore of the gun.
To this end I coat the peripheral surface of the pellets or grains with a composition composed of a relatively slow burning explosive ingredient, containing a substance having a lubricating quality, and a solvent of the first ingredient in quantity sulficient to render the mixture paint like in consistency. I prefer to use equal parts-- of nitrocellulose and unctuous graphite. In the accompanying drawings I show an apparatus adapted to manufacture the stringsfrom which the separate grains are subsequently cut and also to apply to the strings my improved coating.
Figure 1 is an elevation, partly in section and somewhat enlarged, of such apparatus. Fig. 2 is a longitudinal sectional view, greatly magnified, of one of the completed smokeless powder grains.
The powder from which the grains are formed, which is of any standard composition, is placed in a press a having in its bottom a perforated plate I) below which is an orifice c of a diameter at its outlet bearing the proper relation to the diameter of the grains to be ultimately formed. A pin d.
projects downward from the plate I) and extends along the axis of the orifice c. the plunger descends, the powder is forced through the perforations in the plate I) and fills the orifice 0 between the outer wall thereof and the pin d, thereby causing the powder to be ejected from the press in the form of a long string at longitudinally and centrally perforated. This apparatus is old in the art and forms no part of my invention.
A tank e is provided containing my improved coating composition above described, and the powder string :12, by means of rollers g and h i fed into, through and out of the bath, causing the string to be superficially coated with a retarding and lubricating. coating. As the string passes beyond the. roller g, it may be subjected, at the point i as indicated by the arrows, to a current of hot air in order to drive off the solvent and dry the coating. At 7' a pipe may be arranged with a suction to convey the vapors to an apparatus to recovera portion of the solvent. Subsequently the string is cut 'into separate grains in the manner well known in the art.
A finished single grain or pellet is shown in Fig. 2 in which 3 represents the main body of smokeless powder and z the coating of nitrocellulose and unctuous graphite.
Having now fully described my invention, what I claim and desire to protect by Letters Patent is:
1. As a new article of manufacture, a
smokeless powder grain having a relatively quick burning body and an exterior coat- Patented uly 1, 1919.
ing composed of a relatively slow burning composition which contains an ingredient having a lubricating qu'ality,
- 2. As a new article of manufacture, a smokeless powder grain coated; exteriorly with a mixture of nitrocellulose and graphite. v
3. As a new' article of manufacture, a cylindrically shaped axiall perforated pellet of smokeless powder aving its outer periphery painted with a coating composed of relatively slow burning composition wh ch contains an ingredient having a lubricating quality.
As a' new article of manufacture, a cylindrically shaped axially perforated pellet of smokeless powder, having its outer periphery coated with a mixture of nitrocellulose and graphite. I
5. The proc'esswhich consists coating smokeless powder with a relatively slow burning composition comprising an explosive ingredient, a substance having a lubricating quality, and a solventof the first ingredient.
6. The process which consists in coating smokeless powder with a relatively slow burning composition comprising an ex 10- sive ingredient, a substance havlng a In ricating quality, and a solvent of the first ingradient, and then volatilizing the solvent.
7. {The process which consists in coating smokeless powder with a composltion composedof n1trocellulose,'graph1te and a solvent of nitrocellulose.
' 8 As a new rticle of manufacture, a. cyliniirically s aped axially perforated pel-
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1308343A true US1308343A (en) | 1919-07-01 |
Family
ID=3375857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US1308343D Expired - Lifetime US1308343A (en) | Smokeless powder and process of coating same |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1308343A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2446541A (en) * | 1942-11-13 | 1948-08-10 | Tennessee Products Corp | Extraction of nitrocellulose from nitrating solution |
| US2574479A (en) * | 1943-01-30 | 1951-11-13 | Clarence N Hickman | Propellant having an opacifier for preventing self-ignition by radiant energy radiations |
| US5345873A (en) * | 1992-08-24 | 1994-09-13 | Morton International, Inc. | Gas bag inflator containing inhibited generant |
| US5682013A (en) * | 1992-08-24 | 1997-10-28 | Morton International, Inc. | Gas generant body having pressed-on burn inhibitor layer |
-
0
- US US1308343D patent/US1308343A/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2446541A (en) * | 1942-11-13 | 1948-08-10 | Tennessee Products Corp | Extraction of nitrocellulose from nitrating solution |
| US2574479A (en) * | 1943-01-30 | 1951-11-13 | Clarence N Hickman | Propellant having an opacifier for preventing self-ignition by radiant energy radiations |
| US5345873A (en) * | 1992-08-24 | 1994-09-13 | Morton International, Inc. | Gas bag inflator containing inhibited generant |
| US5682013A (en) * | 1992-08-24 | 1997-10-28 | Morton International, Inc. | Gas generant body having pressed-on burn inhibitor layer |
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