US3771460A - Rigid consumable foam powder bag - Google Patents

Rigid consumable foam powder bag Download PDF

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Publication number
US3771460A
US3771460A US00247541A US3771460DA US3771460A US 3771460 A US3771460 A US 3771460A US 00247541 A US00247541 A US 00247541A US 3771460D A US3771460D A US 3771460DA US 3771460 A US3771460 A US 3771460A
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United States
Prior art keywords
powder bag
cloth
gun
cylinder
consumable
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Expired - Lifetime
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US00247541A
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D Ayer
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US Department of Navy
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US Department of Navy
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    • 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
    • F42B5/38—Separately-loaded propellant charges, e.g. cartridge bags
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S102/00—Ammunition and explosives
    • Y10S102/704—Coolants

Definitions

  • ABSTRACT A powder bag for gun propellant charges in the form of a hollow cylindrical casing and made from high density polyurethane foam.
  • the cylinder is filled with propellant and closed at both ends by consumable cloth caps, one cap having a standard ignition pad attached externally thereto.
  • a cloth handling strap may be attached to the second cap and gun bore erosion reduction additives may be impregnated in the foam casing.
  • an object of the present invention is to provide an improved gun propellant powder bag.
  • Another object of the instant invention is to provide a gun propellant powder bag that resists deformation thus reducing fit interference upon loading in a gun chamber.
  • a further object of the present invention is to provide a gun propellant powder bag which is durable and resists ripping, tearing, abrading, rot, and biological degradation.
  • a still further object of the instant invention is to provide a gun propellant powder bag that is easy and inexpensive to fabricate.
  • Still another object of the present invention is to provide a gun propellant powder bag that has increased electrical conductivity thus reducing the safety hazard of sparking.
  • a still further object of the instant invention is to provide a gun propellant powder bag that is compatible with most propellants.
  • a final object of the present invention is to provide a gun propellant powder bag that inherently has gun barrel erosion reducing properties and is consumable.
  • a powder bag molded or cast of a high density polyurethane foam in the form of an open-ended cylinder End caps of consumable cloth fabric are adhered to each end after filling. the cylinder with propellant.
  • One end cap may have attached to'its exterior, a standard ignition pad, and attached to this one end on the cylinder, a cloth handling strap.
  • This construction provides a powder bag that is completely consumed, and provides barrel erosion reducers in addition to ease of manufacture, and durability.
  • FIGURE is an isometric view of the novel gun propellant powder bag.
  • FIG. 1 there is shown generally a powder bag 10. Constituting the sides and main portion of the bag is a hollow open cylinder 12 made of a rigid high density polyurethane foam, or the like. While this material is consumable and has inherent gun bore erosion reducing properties, additives may be included, such as conductive carbon and molybdenum disulfide.
  • an adhesive 14 such as a neoprene adhesive is an end cap 16 made of a fabric cloth such as silk or acrylic rayon.
  • the cylinder 12 is then filled with a propellant 20 having the desired ballistic properties.
  • the other end of the cylinder 12 is closed with a second end cap 18, made of a cloth such as silk or acrylic rayon, and sealed thereto with a neoprene adhesive 14.
  • a standard ignition pad 22 of black powder or the like is attached to the exterior of the second end cap 18 by means of a neoprene adhesive 14.
  • a handling strap 24 of a suitable consumable cloth is attached to the cylinder 12 at the ignition pad 22 end by means of a neoprene adhesive 14.
  • the gun propellant powder bag 12 may be handled and stored in the conventional manner and loaded for firing in standard self-obturating gun systems. It is placed in the gun chamber behind the projectile with the ignition pad 22 to the rear, the breech closed and the gun fired. The materials of the novel combination are completely consumed and reduce gun bore erosion.
  • a powder bag for a gun propellant charge comprismg:
  • a hollow open-ended cylinder composed of high density rigid polyurethane foam
  • the powder bag of claim 2 further comprising an ignition pad attached one of said end caps.
  • the powder bag of claim 4 further comprising a consumable cloth handling strap attached to said cylinder at the ignition pad end.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)

Abstract

A powder bag for gun propellant charges in the form of a hollow cylindrical casing and made from high density polyurethane foam. The cylinder is filled with propellant and closed at both ends by consumable cloth caps, one cap having a standard ignition pad attached externally thereto. A cloth handling strap may be attached to the second cap and gun bore erosion reduction additives may be impregnated in the foam casing.

Description

United States Patent [191 Ayer RIGID CONSUMABLE FOAM POWDER BAG [75] Inventor: Douglas E. Ayer, La Plata, Md.
[73] Assignee: The United States of America as represented by the Secretary of the Navy, Washington, DC.
22 Filed: Apr. 26, 1972 [21] Appl. No.: 247,541
[52] US. Cl. 102/97, 102/24 R, 102/43 P, 102/DIG. 8 [51] Int. Cl. F42b 9/24 [58] Field 01 Search 102/97, 38, 43 R, 102/43 P, 46, 24 R [56] References Cited UNITED STATES PATENTS 1,625,631 4/1927 Spotswood et a1 102/97 3,257,948 6/1966 Axelrod et a1 102/43 P Nov. 13, 1973 3,397,636 8/1968 Jacobson et al. 102/38 2,405,104 7/1946 Mydans 102/97 1,329,503 2/1920 Casey 102/97 2,748,701 6/1956 Barrows 102/43 P Primary Examiner-Robert F. Stahl Attorney-R. S. Sciascia et al.
[57] ABSTRACT A powder bag for gun propellant charges in the form of a hollow cylindrical casing and made from high density polyurethane foam. The cylinder is filled with propellant and closed at both ends by consumable cloth caps, one cap having a standard ignition pad attached externally thereto. A cloth handling strap may be attached to the second cap and gun bore erosion reduction additives may be impregnated in the foam casing.
6 Claims, 1 Drawing Figure RIGID CONSUMABLE FOAM POWDER BAG BACKGROUND OF THE INVENTION This invention relates generally to ordnance propellant charges, and more particularly, to powder bags having more durability than conventional cloth bags. The need for improved powder bags becomes evident where one realizes that the standard cloth propellant bag has been employed by the Army and Navy, with virtually no design changes, since the early 1900's. The standard cloth bag has a specific electrical resistivity permitting electrostatic charges to be built up creating a serious hazard of explosion and is incompatable with some propellants. It is difficult to fabricate, requiring hand sewing, and often stretches out of shape hindering gun loading. Furthermore, the use of cloth allows rips, tears, and holes to develop during handling, and most cloth is susceptible to rot and other biological degradation. Despite these serious problems, no significant design changes have been made to this bag. Various fabrics and cloth have been used as well as metal cartridge cases being substituted in some cases, but they have not substantially improved the powder bag.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an improved gun propellant powder bag.
Another object of the instant invention is to provide a gun propellant powder bag that resists deformation thus reducing fit interference upon loading in a gun chamber.
A further object of the present invention is to provide a gun propellant powder bag which is durable and resists ripping, tearing, abrading, rot, and biological degradation.
A still further object of the instant invention is to provide a gun propellant powder bag that is easy and inexpensive to fabricate.
Still another object of the present invention is to provide a gun propellant powder bag that has increased electrical conductivity thus reducing the safety hazard of sparking.
A still further object of the instant invention is to provide a gun propellant powder bag that is compatible with most propellants.
A final object of the present invention is to provide a gun propellant powder bag that inherently has gun barrel erosion reducing properties and is consumable.
Briefly, these and other objects of the present invention are attained by the use of a powder bag molded or cast of a high density polyurethane foam in the form of an open-ended cylinder. End caps of consumable cloth fabric are adhered to each end after filling. the cylinder with propellant. One end cap may have attached to'its exterior, a standard ignition pad, and attached to this one end on the cylinder, a cloth handling strap. This construction provides a powder bag that is completely consumed, and provides barrel erosion reducers in addition to ease of manufacture, and durability.
BRIEF DESCRIPTION OF THE DRAWINGS A more complete understanding of the invention and many of the attendant advantages thereto will be readily appreciated as the same become better understood by reference to the following detailed description when considered in connection with the accompanying drawing wherein the FIGURE is an isometric view of the novel gun propellant powder bag.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawing, in the FIGURE, there is shown generally a powder bag 10. Constituting the sides and main portion of the bag is a hollow open cylinder 12 made of a rigid high density polyurethane foam, or the like. While this material is consumable and has inherent gun bore erosion reducing properties, additives may be included, such as conductive carbon and molybdenum disulfide.
Affixed at one end, as by an adhesive 14, such as a neoprene adhesive is an end cap 16 made of a fabric cloth such as silk or acrylic rayon. The cylinder 12 is then filled with a propellant 20 having the desired ballistic properties.
The other end of the cylinder 12 is closed with a second end cap 18, made of a cloth such as silk or acrylic rayon, and sealed thereto with a neoprene adhesive 14. A standard ignition pad 22 of black powder or the like is attached to the exterior of the second end cap 18 by means of a neoprene adhesive 14. For loading and handling convenience, a handling strap 24 of a suitable consumable cloth is attached to the cylinder 12 at the ignition pad 22 end by means of a neoprene adhesive 14.
In use, the gun propellant powder bag 12 may be handled and stored in the conventional manner and loaded for firing in standard self-obturating gun systems. It is placed in the gun chamber behind the projectile with the ignition pad 22 to the rear, the breech closed and the gun fired. The materials of the novel combination are completely consumed and reduce gun bore erosion.
Obviously, numerous modification and variations of the present invention are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described.
I claim:
1. A powder bag for a gun propellant charge comprismg:
a hollow open-ended cylinder composed of high density rigid polyurethane foam;
a pair of end caps closing each end of said cylinder and made of a cloth selected from the group consisting of silks, acrylic rayons, and mixtures thereof; and V ,a conductive carbon impregnated into said cylinder to reduce electrostatic charge build-up.
2. The powder bag of claim 1 wherein said cylinder is impregnated with molybdenum disulfide.
3. The powder bag of claim 2 further comprising an ignition pad attached one of said end caps.
4. Thepowder bag of claim 3 wherein said ignition pad is filled with black powder.
5. The powder bag of claim 4 further comprising a consumable cloth handling strap attached to said cylinder at the ignition pad end.
6. The powder bag of claim 5 wherein said handling strap, said ignition pad, and said end caps are secured by means of a neoprene adhesive.

Claims (5)

  1. 2. The powder bag of claim 1 wherein said cylinder is impregnated with molybdenum disulfide.
  2. 3. The powder bag of claim 2 further comprising an ignition pad attached one of said end caps.
  3. 4. The powder bag of claim 3 wherein said ignition pad is filled with black powder.
  4. 5. The powder bag of claim 4 further comprising a consumable cloth handling strap attached to said cylinder at the ignition pad end.
  5. 6. The powder bag of claim 5 wherein said handling strap, said ignition pad, and said end caps are secured by means of a neoprene adhesive.
US00247541A 1972-04-26 1972-04-26 Rigid consumable foam powder bag Expired - Lifetime US3771460A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2370257A1 (en) * 1976-10-01 1978-06-02 Brown Andrew EXCAVATION CHARGE CASE
US4949640A (en) * 1984-03-09 1990-08-21 Rheinmetall Gmbh Propellant charge container
US5269224A (en) * 1990-08-30 1993-12-14 Olin Corporation Caseless utilized ammunition charge module
US5323707A (en) * 1991-08-05 1994-06-28 Hercules Incorporated Consumable low energy layered propellant casing
US5375528A (en) * 1993-02-18 1994-12-27 Brinkman; John A. Container for a large spherical explosive charge
US6382104B1 (en) * 2000-11-07 2002-05-07 The United States Of America As Represented By The Secretary Of The Navy Two-piece base pad igniter bag
US20050223931A1 (en) * 2004-04-08 2005-10-13 Keith Michael A Accuracy less lethal projectile
EP2283301A1 (en) * 2008-06-03 2011-02-16 Diehl BGT Defence GmbH & Co.KG Propellant charge
RU2586198C1 (en) * 2014-12-15 2016-06-10 Федеральное казенное предприятие "Государственный научно-исследовательский институт химических продуктов" (ФКП "ГосНИИХП") Material for inert simulator of rigid combustible bag

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1329503A (en) * 1918-07-22 1920-02-03 Du Pont Container for explosives
US1625631A (en) * 1923-03-27 1927-04-19 E L Du Pont De Nemours & Compa Container for explosives
US2405104A (en) * 1941-08-07 1946-07-30 William E Mydans Ordnance powder bag
US2748701A (en) * 1951-08-28 1956-06-05 Wendell P Barrows Electrically conductive coating
US3257948A (en) * 1963-08-23 1966-06-28 Axelrod Sydney Consumable artillery components
US3397636A (en) * 1967-03-22 1968-08-20 Wegematic Corp Wear reduction additives

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1329503A (en) * 1918-07-22 1920-02-03 Du Pont Container for explosives
US1625631A (en) * 1923-03-27 1927-04-19 E L Du Pont De Nemours & Compa Container for explosives
US2405104A (en) * 1941-08-07 1946-07-30 William E Mydans Ordnance powder bag
US2748701A (en) * 1951-08-28 1956-06-05 Wendell P Barrows Electrically conductive coating
US3257948A (en) * 1963-08-23 1966-06-28 Axelrod Sydney Consumable artillery components
US3397636A (en) * 1967-03-22 1968-08-20 Wegematic Corp Wear reduction additives

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2370257A1 (en) * 1976-10-01 1978-06-02 Brown Andrew EXCAVATION CHARGE CASE
US4114537A (en) * 1976-10-01 1978-09-19 Andrew James Brown Explosive device
US4949640A (en) * 1984-03-09 1990-08-21 Rheinmetall Gmbh Propellant charge container
US5269224A (en) * 1990-08-30 1993-12-14 Olin Corporation Caseless utilized ammunition charge module
US5323707A (en) * 1991-08-05 1994-06-28 Hercules Incorporated Consumable low energy layered propellant casing
US5375528A (en) * 1993-02-18 1994-12-27 Brinkman; John A. Container for a large spherical explosive charge
US6382104B1 (en) * 2000-11-07 2002-05-07 The United States Of America As Represented By The Secretary Of The Navy Two-piece base pad igniter bag
US20050223931A1 (en) * 2004-04-08 2005-10-13 Keith Michael A Accuracy less lethal projectile
US7278357B2 (en) * 2004-04-08 2007-10-09 Keith Michael A Accuracy less lethal projectile
US8205556B1 (en) * 2004-04-08 2012-06-26 Keith Michael A Accuracy less lethal projectile
EP2283301A1 (en) * 2008-06-03 2011-02-16 Diehl BGT Defence GmbH & Co.KG Propellant charge
RU2586198C1 (en) * 2014-12-15 2016-06-10 Федеральное казенное предприятие "Государственный научно-исследовательский институт химических продуктов" (ФКП "ГосНИИХП") Material for inert simulator of rigid combustible bag

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