US1861522A - Projectile with automatic driving band - Google Patents

Projectile with automatic driving band Download PDF

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Publication number
US1861522A
US1861522A US540783A US54078331A US1861522A US 1861522 A US1861522 A US 1861522A US 540783 A US540783 A US 540783A US 54078331 A US54078331 A US 54078331A US 1861522 A US1861522 A US 1861522A
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US
United States
Prior art keywords
ring
projectile
groove
gun
lesser
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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US540783A
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English (en)
Inventor
Brandt Edgar William
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Individual
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Individual
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Publication date
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Application granted granted Critical
Publication of US1861522A publication Critical patent/US1861522A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/02—Driving bands; Rotating bands

Definitions

  • the present invention has for object an improvement in projectiles, in particular in those intended to be shot by means of guns having smooth linings, and which may be charged through the mouth, the said improvement permitting of automatically obtaining tightness of the shooting tube at the moment of fire.
  • an extensible ring preferably of deformable elastic or plastic material is located in a groove of appropriate form in the projectile wall which it does not obstruct, but, on the contrary, permits perfect sliding into the gun lining dur- 16 ing charging, the said ring being displaced and being deformed at the begnning of the discharge, under the effect of the gases of the pro elhng charge, which force it tightly against the tube wall in such manner as to Z0 insure a rigorous tightness.
  • Fig. 1 is a partial elevation of a projectile with a band according to the invention.
  • Fig. 2 is an axial section of a detail, on a larger scale, with the band in the position of rest.
  • Fig. 3 is a view similar to that of Fig. 2, the band being in the working position.
  • Figs. 4 and 5 are similar views of a modified construction, showing respectively the band in positions of rest and for working.
  • a driving band formed by an extensible ring 1, (Figs. 1 and 2) of round section, for example, is located in a groove 2 of the projectile.
  • This groove has a profile chosen in such manner that the displacement of the ring 1 can only be produced by a predetermined force. It may be formed of a single element split or not, or by means of several elements suitably connected together by aid of hooks or in an other manner.
  • the wall ple may be made of copper, brass, leather, :1 rubber mixture, or even of cotton cord, etc.
  • This ring may, in some cases, be protected against deterioration by a suitable acket or covering preferably constituted by a very thin metal film, applied electrolytically.
  • a layer of material capale of facilitating the sliding for example, an alkaline soap "diluted in a suitable solvent and applied to the ring or even to the projec tile and specially in the groove.
  • the ring when of rubber or similarimaterial may be provided with a jacket formed, for example, by means of a wound metal wire.
  • the ring 1 is forced upward in the groove 2 and is deformed and expanded in the course of its displacement by reason of the peculiar form of the groove, and comes to bear bet-ween the .wall 3 of the tube and the wall 4 of the projectile (Fig. 3). It thus assures the desired tightness and at the same time produces an automatic cleaning of the lining.
  • a ring 1 of rectangular section may also be.employed, for example, of rubber, located in a groove 2 of corresponding form as shown in Fig. 4.
  • the gases from the powder exert upon the lower face of the ring 1 an increased pressure at'the moment when the pressure prevailing between the outer face of the ring and 3 of the shooting tube is diminished by the increase of the velocity of the gases. Consequently, the ring 1, being compressed in the direction of height, is expanded in diameter and comes to bear between the wall 3 of the tube and the wall 4 of theprojectile (Fig. 5) and thus assures the desired tightness and the cleaning of the lining as in the preceding case.
  • the band according to this invention assures not only, with an equal charge, a considerable increase in the distanceof trajectory and of accuracy of fire with respect to previous, systems for the same purpose (channels forming pneumatic joints, etc.) but also a large nu ber of other advantages result at the same time from the nature and the method of operation of the band.
  • the flexibility of its operation permits compensating for the variations of longed rapid firing and assures, consequently, the maintenance of distance of trajector from beginning to end of a burst of fire of this type, without it being necessary to vary the an le of elevation.
  • the ring is of lesser normal external diameter than the external diameter of the projectile adjacent the grooves and is expanded outwardly by the pressure form a driving band by engagement between the projectile and gun walls.
  • the ring is originally of lesser cross section than the cross section of the groove.
  • the ring is located toward the front or point side of the rear wall of the groove in such manner as to provide a space into which the powder gases may pass for acting upon the rear surface of the ring and cause it to be expanded outwardly.
  • the rearward or base wall of the groove is comprised, at least in part, of a conical surface.
  • this band permits further to increase the tolerances of manufacture of the gun and the projectile, which thus may be made directly by casting.
  • the projectile is made by casting as cups, the thin seam or irregular joint corresponding to the line of connection sf the two cups may come at the groove 2.
  • the projectile is of double-ogival form and its body portion has a maximum diameter at a point intermediate the ends, from which it decreases in both directions toward front and rear, while the groove is located substantially at the point of maximum diameter.
  • a projectile intended to be fired from a caliber arising in the gun by a proof the powder gases smooth bore gun comprisin a bod portion of lesser diameter than the re whereby it is adapted to slide freely therein, said body portion having a peripheral groove and a ring of deformable material of lesser external diameter than the external diameter of said body ortion and located in said groove, said ring being of lesser cross-section than said groove and located away from the rear wall thereof to provide a space in which the powder gases may act on said ring to expand it outwardly into engagement between the projectile and gun walls to form a driving band.
  • a projectile comprising two castings in the form of cups, one forming the base and the other the front of the projectile, said cups each having reduced diameters at their abutting surfaces to form a peripheral groove when the castings are connected, means for connecting the. castings together, and a ring of deformable material located in the groove and of lesser or sectional area than said groove and of lesser external diameter than the external diameter of said castings.
  • a projectile intended to be fired from a smooth bore gun comprising a body portion of lesser diameter than the bore whereby it is adapted to slide freely therein and pro vided with a conical wall of a peripheral groove, and a ring of deformable material of lesser external diameter than the externaldiameter of said body portion and located in said groove, said ring being of lesser cross-section than said groove and located away from the rear wall thereof to provide a space in which the powder gases may act on said ring to force it along said conical wall and expand it outwardly into engagement between the projectile and gun walls to form a driving band.
  • a projectileintended to be fired from a smooth bore gun comprising a body portion of lesser diameter than the bore whereby it is adapted to slide freely therein and provided with a conical wall forming the rear of a peripheral groove, and a ring of deformable material of lesser external diameter than the external diameter of said body portion and located in said groove, said ring being of lesser cross section than said groove and located away from said rear wall thereof to provide a space adjacent said conical wall in which the powder gases may act on said ring to expand it outwardly into engagement between the projectile and gun walls to form a driving band.
  • a projectile intended to be fired from a smooth bore gun comprisin a body portion of lesser diameter than the bore whereby it is adapted to slide freely therein and provided with opposed divergent conical walls forming the front and rear of a peripheral groove, and a ring of deformable material of lesser external diameter than the external forming the front diameter of said body portion and located in said groove, said ring being of lesser cross section than said groove and located away from the rear wall thereof whereby to provide a space adjacent said rear conical wall in which the powder gases may act on said ring to force it along said front conical wall and expand it outwardly into engagement between the projectile and gun walls to form a driving band.
  • a projectile intended to be fired from a smooth bore gun comprising a body portion of lesser diameter than the bore whereby it is adapted to slide freely therein and having a peripheral groove, and a ring of asoft nonmetalli-c deformable material of lesser external diameter than the external diameter of said body portion and located in said groove, said ring being of lesser cross-section than said groove and located away from the rear wall thereof to provide a space in which the powder gases may act on said ring to expand it outwardly into engagement between the projectile and gun walls to form a driving band.
  • a projectile intended to be fired from a smooth bore gun comprising a body portion of lesser diameter than the bore whereby it is adapted to slide freely therein and having a peripheral groove, and an extensible ring of soft deformable material having a thin covering of metal thereon and located in said groove, said ring being of lesser normal ex ternal diameter than the external diameter of the projectile adjacent said groove, and being adapted for outward expansion by the powder gases whereby to engage between the pro lizctile and gun walls to form a driving 8.
  • a projectile intended to be fired from a smooth bore gun comprising a body portion of lesser diameter than the bore whereby it is adapted to slide freely therein and having a peripheral groove with a rear wall, an ex tensible ring of deformable material located in said groove and of lesser normal external diameter than the external diameter of the projectile adjacent said groove, said ring bemg located away from said rear wall to provide a space in which the powder gases may act on said ring to expand it outwardly into engagement between the projectile and gun walls to form a driving band, and a soapy coating on said ring and projectile to facilitate the charging of the projectile into the gun and to cleanse the gun bore during discharge.
  • a projectile intended to be fired from a smooth bore gun comprising a body portion of lesser diameter than the bore whereby it is adapted to slide freely therein and having a peripheral groove with a rear wall and a ring of a soft non-metallic deformable material having a thin covering of metal thereon and of lesser external diameter than the exlesser external diameter than the external ternal diameter of said body portion and located in said groove, said ring being of lesser cross-section than said groove and located away from the said rear wall thereof to provide a space in which the powder gases may act on said ring to expand it outwardly into engagement between the projectile and gun walls to form a driving band.
  • a projectile intended to be fired from a smooth bore gun comprising a body portion of lesser diameter than the bore whereby it is adapted to slide freely therein and having a peripheral groove with a rear wall and a ring of a metallic deformable material (pf body portion and located in said groove,said ring being of lesser cross section than said groove and located away from the said rear wall thereof to provide a space in which the powder gases may act on said ring to expand it outwardly into engagement between the projectile and gun walls to form a driving band.
  • a projectile intended to be fired from a smooth bore gun comprising a body portion of double-ogival form having a maximum diameter at an intermediate point of its length, said body having a peripheral groove substantially at the point of maximum diam eter, and an extensible ring of deformable material located in said groove and of lesser normal external diameter than the external diameter of the projectile adjacent said groove, said ring being located away from the rear wall of said groove to provide a space in which the powder gases may act on said ring to expand it outwardly into engagement between the projectile and gun walls to form a driving band.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Gasket Seals (AREA)
US540783A 1930-06-16 1931-05-28 Projectile with automatic driving band Expired - Lifetime US1861522A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR580687X 1930-06-16

Publications (1)

Publication Number Publication Date
US1861522A true US1861522A (en) 1932-06-07

Family

ID=8956973

Family Applications (1)

Application Number Title Priority Date Filing Date
US540783A Expired - Lifetime US1861522A (en) 1930-06-16 1931-05-28 Projectile with automatic driving band

Country Status (7)

Country Link
US (1) US1861522A (de)
BE (1) BE380293A (de)
CH (1) CH156484A (de)
DE (1) DE580687C (de)
FR (2) FR712521A (de)
GB (1) GB365003A (de)
NL (1) NL32909C (de)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442369A (en) * 1942-07-20 1948-06-01 Us Sec War Rifling band
US2974593A (en) * 1952-11-07 1961-03-14 Forrest G Bitner Seal
US3130671A (en) * 1955-11-26 1964-04-28 Berghaus Elektrophysik Anst Method of reducing barrel wear
US3585934A (en) * 1967-11-24 1971-06-22 Aai Corp Underwater ammunition
US3687079A (en) * 1970-11-20 1972-08-29 Us Army Sectioned obturating ring
US4109582A (en) * 1975-11-15 1978-08-29 Rheinmetall Gmbh Twist-reducing rings for stabilized projectiles
US4413567A (en) * 1979-09-08 1983-11-08 Etablissement Salgad Fin-stabilized mortar grenade
US4470604A (en) * 1977-12-12 1984-09-11 Hoffmann Anton R Target practice system
US4552071A (en) * 1982-06-15 1985-11-12 United Technologies Corporation Two-piece despin obturator
US5056406A (en) * 1990-03-15 1991-10-15 The Boeing Company Fiber optic mortar projectile
US5189250A (en) * 1988-10-05 1993-02-23 Frag, Ltd. Projectile for smooth bore weapon
US5259319A (en) * 1992-03-20 1993-11-09 Richard Dravecky Reusable training ammunition
US5682011A (en) * 1995-09-05 1997-10-28 Rheinmetall Industrie Aktiengesellschaft Sealing ring arrangement for a spin-stabilized projectile
EP0839310A1 (de) * 1995-07-19 1998-05-06 O'DWYER, James Michael Lauf mit axial hintereinander angeordneten projektilen
US6295934B1 (en) 1999-06-29 2001-10-02 Raytheon Company Mid-body obturator for a gun-launched projectile
US6369373B1 (en) 1999-06-29 2002-04-09 Raytheon Company Ramming brake for gun-launched projectiles
US6453821B1 (en) * 1999-06-29 2002-09-24 Raytheon Company High-temperature obturator for a gun-launched projectile
US6672194B2 (en) * 2001-07-19 2004-01-06 Textron Systems Corporation Energetic-based actuator device with rotary piston
US6769364B2 (en) * 2001-11-23 2004-08-03 Rheinmetall W & M Gmbh Full-caliber projectile
WO2006110151A1 (en) * 2004-06-09 2006-10-19 United Defense Lp Projectile fall-back preventer
US20090282719A1 (en) * 1994-03-14 2009-11-19 Metal Storm Limited Barrel Assembly And Projectile For Use With The Same
US20100154624A1 (en) * 2007-07-04 2010-06-24 Bae Systems Plc Charge mount
US10921103B2 (en) 2014-06-27 2021-02-16 Shooting Edge Technology, LLC Air driven projectile

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL266519A (de) * 1960-06-29
DE3033042C2 (de) * 1980-09-03 1985-06-27 L'Etat Français représenté par le Délégué Général pour l'Armement, Paris Mittel zum Forcieren während der Schußentwicklung bei Munition für eine Glattrohrwaffe
WO2018109436A1 (en) 2016-12-16 2018-06-21 Bae Systems Plc Mortar bomb
GB2557925A (en) * 2016-12-16 2018-07-04 Bae Systems Plc Mortar bomb

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442369A (en) * 1942-07-20 1948-06-01 Us Sec War Rifling band
US2974593A (en) * 1952-11-07 1961-03-14 Forrest G Bitner Seal
US3130671A (en) * 1955-11-26 1964-04-28 Berghaus Elektrophysik Anst Method of reducing barrel wear
US3585934A (en) * 1967-11-24 1971-06-22 Aai Corp Underwater ammunition
US3687079A (en) * 1970-11-20 1972-08-29 Us Army Sectioned obturating ring
US4109582A (en) * 1975-11-15 1978-08-29 Rheinmetall Gmbh Twist-reducing rings for stabilized projectiles
US4470604A (en) * 1977-12-12 1984-09-11 Hoffmann Anton R Target practice system
US4413567A (en) * 1979-09-08 1983-11-08 Etablissement Salgad Fin-stabilized mortar grenade
US4552071A (en) * 1982-06-15 1985-11-12 United Technologies Corporation Two-piece despin obturator
US5189250A (en) * 1988-10-05 1993-02-23 Frag, Ltd. Projectile for smooth bore weapon
US5056406A (en) * 1990-03-15 1991-10-15 The Boeing Company Fiber optic mortar projectile
US5259319A (en) * 1992-03-20 1993-11-09 Richard Dravecky Reusable training ammunition
US8387532B2 (en) 1994-03-14 2013-03-05 Metal Storm Limited Barrel assembly and projectile for use with the same
US20090282719A1 (en) * 1994-03-14 2009-11-19 Metal Storm Limited Barrel Assembly And Projectile For Use With The Same
EP0839310B1 (de) * 1995-07-19 2007-01-10 Storm Limited Metal Lauf mit axial hintereinander angeordneten projektilen
US7735254B2 (en) 1995-07-19 2010-06-15 O'dwyer James Michael Projectile and method for sealing a projectile in a barrel
US20050217529A1 (en) * 1995-07-19 2005-10-06 O'dwyer James M Projectile and method for sealing a projectile in a barrel
EP0839310A1 (de) * 1995-07-19 1998-05-06 O'DWYER, James Michael Lauf mit axial hintereinander angeordneten projektilen
US5682011A (en) * 1995-09-05 1997-10-28 Rheinmetall Industrie Aktiengesellschaft Sealing ring arrangement for a spin-stabilized projectile
US6453821B1 (en) * 1999-06-29 2002-09-24 Raytheon Company High-temperature obturator for a gun-launched projectile
US6369373B1 (en) 1999-06-29 2002-04-09 Raytheon Company Ramming brake for gun-launched projectiles
US6295934B1 (en) 1999-06-29 2001-10-02 Raytheon Company Mid-body obturator for a gun-launched projectile
US6672194B2 (en) * 2001-07-19 2004-01-06 Textron Systems Corporation Energetic-based actuator device with rotary piston
US6769364B2 (en) * 2001-11-23 2004-08-03 Rheinmetall W & M Gmbh Full-caliber projectile
WO2006110151A1 (en) * 2004-06-09 2006-10-19 United Defense Lp Projectile fall-back preventer
US20100154624A1 (en) * 2007-07-04 2010-06-24 Bae Systems Plc Charge mount
US8127684B2 (en) * 2007-07-04 2012-03-06 Bae Systems Plc Charge mount
US10921103B2 (en) 2014-06-27 2021-02-16 Shooting Edge Technology, LLC Air driven projectile
US11674780B2 (en) * 2014-06-27 2023-06-13 Shooting Edge Technology, LLC Air driven projectile

Also Published As

Publication number Publication date
DE580687C (de) 1933-07-17
BE380293A (de)
FR45411E (fr) 1935-09-04
FR712521A (fr) 1931-10-03
NL32909C (de)
GB365003A (en) 1932-01-14
CH156484A (fr) 1932-08-15

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