UNDERSIZED-CALIBER PROJECTILE WITH DETACHABLE SABOT

• US 3,780,658 A
• Filed: 09/03/1971
• Issued: 12/25/1973
• Est. Priority Date: 09/03/1971
• Status: Expired due to Term

• Current Assignee: Ernst Jakob Kessler, Jacques Charles De Longueville, Jacques Felix Charles Perfetti
• Original Assignee: Ernst Jakob Kessler, Jacques Charles De Longueville, Jacques Felix Charles Perfetti
• Inventors: de Longueville, Jacques Charles, Perfetti, Jacques Felix Charles, Kessler, Ernst Jakob
• Primary Examiner(s): Pendegrass, Verlin R.
• Application Number:
  US05/177,573
• Time in Patent Office: 844 Days
• Field of Search: 102/52
• US Class Current: 102/518
• CPC Class Codes: F42B 10/40 with combustion of a slow-burning charge, e.g. fumers, base-bleed projectiles
• CPC Class Codes: F42B 12/06 with hard or heavy core; Kinetic energy penetrators F42B12/16, F42B12/74 take precedence
• CPC Class Codes: F42B 14/064 Sabots enclosing the rear end of a kinetic energy projectile, i.e. having a closed disk shaped obturator base and petals extending forward from said base
• CPC Class Codes: F42B 14/08 Sabots filled with propulsive charges; Removing sabots by combustion of pyrotechnic elements or by propulsive-gas pressure arrangements on barrels for removing sabots from projectiles F41A21/46

Abstract

An armor-piercing projectile comprising an undersized-caliber core arranged inside a detachable sabot or shoe, wherein a cavity is provided at the back of the core in which a gas generating composition, is seated. The base of the shoe is provided opposite this cavity with a calibrated orifice having a sectional area such as to allow hot gases from a powder charge to pass from the associated casing to ignite the discharge composition, while allowing the developed gas pressure from the composition to be used for effecting discharge.

Claims

1. An armor-piercing projectile, operable with a powder charge adapted for generating hot gases, comprising an undersizedcaliber core, a removable shoe around said core, a cavity being provided in the core, a gas-generating composition in said cavity, the shoe being provided opposite said cavity with a calibrated orifice having a cross-sectional area to allow the hot gases from the powder charge to ignite the said composition, gas pressure developed by the said composition resulting in separating the core and shoe, first and second springs, said shoe including a base, a cover on said shoe, the core being elastically mounted inside the shoe between said springs, said first spring being an elastic part on the base of the shoe and the second spring being a lock spring in said cover and bearing against the core, said lock spring being a helical spring encircling said core, said cover being provided with an annular seating inside which the said helical spring can expand under the effect of the centrifugal force resulting from rotation of the projectile whereby the core is liberated from the shoe.

2. A projectile as claimed in claim 1 comprising a centering collar inside the shoe and fitted to said core, the core and base having respective conical surfaces engaged to position the core.

3. A projectile as in claim 2, wherein the shoe comprises an external guide collar, concentric with and level with the said centering collar, and a band on a level with the conical surface of the base and adapted to operate in conjunction with the rifling of a firing tube.

4. A projectile as claimed in claim 3 comprising a conical nosepiece on the core.

5. A projectile as claimed in claim 4 comprising a conical nosepiece on said cover.

6. A projectile as claimed iN claim 1 wherein said composition includes barium and strontium peroxide and powdered magnesium.

7. An armor-piercing projectile, operable with a powder charge adapted for generating hot gases, comprising an undersized-caliber core, a removable shoe around said core, a cavity being provided in the core, a gas-generating composition in said cavity, the shoe being provided opposite said cavity with a calibrated orifice having a cross-sectional area to allow the hot gases from the powder charge to ignite the said composition, gas pressure developed by the said composition resulting in separating the core and shoe, first and second springs, said shoe including a base, a cover on said shoe, the core being elastically mounted inside the shoe between said springs, said first spring being an elastic part on the base of the shoe and the second spring being a lock spring in said cover and bearing against the core, said core having a rear portion of conical shape, said base of the shoe having a conical recess in which the conically-shaped rear portion of the core is received in spaced relation under the conjoint action of the first and second springs, said conically-shaped rear portion of the core entering into contact with said base at said recess and thus being centered thereby upon rearward travel of the core in said shoe, against the action of the second spring, upon firing of the projectile.