US3515072A - Tracer projectile - Google Patents

Tracer projectile Download PDF

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Publication number
US3515072A
US3515072A US726010A US3515072DA US3515072A US 3515072 A US3515072 A US 3515072A US 726010 A US726010 A US 726010A US 3515072D A US3515072D A US 3515072DA US 3515072 A US3515072 A US 3515072A
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United States
Prior art keywords
projectile
magnesium
rear portion
tracer
igniting mixture
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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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US726010A
Inventor
Irwin R Barr
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United States Department of the Army
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United States Department of the Army
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F42B12/38—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information of tracer type
    • 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
    • Y10S102/703—Flechette

Definitions

  • the invention relates to a tracer projectile and more particularly to a tracer projectile comprised of a twopiece, magnesium-steel, projectile having an igniting mixture in a tail section.
  • the instant invention overcomes the aforementioned problems by providing the projectile in two sections, namely, a forward portion comprised of steel and a tail portion comprised of magnesium.
  • a pocket is provided, at the rear of the tail portion, which contains a special igniting mixture which will ignite the magnesium tail portion causing a visible trace of the projectile flight path.
  • Another object is the provision of a projectile having tracing means which tracing means do not affect the ballistic trajectory.
  • a projectile is comprised of a forward steel section 12 having a nose portion 14 and 3,515,072 Patented June 2, 1970 a rear portion 16.
  • a plurality of steel fins 18 are provided at the rear portion 16 in order to insure the desired stability during flight.
  • a magnesium tail section 20 is attached to the rear portion of projectile 10 in axial alignment therewith by a swaging process, as illustrated by reference character 22.
  • the rear portion of the magnesium tail section 20 defines a pocket 24 which contains the special igniting mixture.
  • the igniting mixture is comprised of, for example, Zirconium and barium chromate, and is ignited from the action of the primer (not shown) and in turn initiates burning of the magnesium tail section 20.
  • a tracer projectile comprising,
  • a metallic front portion including a body portion
  • a magnesium rear portion said rear portion being in axial alignment with and connected to said front portion rearwardly of said fins, said rear portion including a tail portion and having a pocket in the rearward end thereof, and

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)

Description

June 2, 1970 R. BARR TRACER PROJECTILE Filed May 2, 1968 INVENTOR. IRWIN R. BARR W ATTORNEYS United States Patent US. Cl. 102-87 3 Claims ABSTRACT OF THE DISCLOSURE A projectile having a steel front section and a magnesium tail section. The magnesium tail section contains an igniting mixture composed of zirconium and barium chromate which upon ignition will act to initiate the burning of the magnesium tail section thereby causing a trace.
The invention described herein may be manufactured, used, and licensed by or for the Government for governmental purposes without the payment to me of any royalty thereon.
The invention relates to a tracer projectile and more particularly to a tracer projectile comprised of a twopiece, magnesium-steel, projectile having an igniting mixture in a tail section.
In the past, it was well known in the art to provide burning means in a projectile so as to be able to trace its path. Upon the advent of flechettes or very small type projectiles the problem of achieving a trace Without affecting the ballistic trajectory became acute. This is due, partially, to the very small area within which the burning means can be located.
The instant invention overcomes the aforementioned problems by providing the projectile in two sections, namely, a forward portion comprised of steel and a tail portion comprised of magnesium. A pocket is provided, at the rear of the tail portion, which contains a special igniting mixture which will ignite the magnesium tail portion causing a visible trace of the projectile flight path.
It is therefore an object of the present invention to provide a projectile of the fiechette type having tracing means.
Another object is the provision of a projectile having tracing means which tracing means do not affect the ballistic trajectory.
The above objects as well as others together with the benefits and advantages of the invention will be apparent upon reference to the detailed description set forth below, particularly when taken in conjunction with the drawing annexed hereto in which: a projectile is comprised of a forward steel section 12 having a nose portion 14 and 3,515,072 Patented June 2, 1970 a rear portion 16. A plurality of steel fins 18 are provided at the rear portion 16 in order to insure the desired stability during flight. A magnesium tail section 20 is attached to the rear portion of projectile 10 in axial alignment therewith by a swaging process, as illustrated by reference character 22. The rear portion of the magnesium tail section 20 defines a pocket 24 which contains the special igniting mixture. The igniting mixture is comprised of, for example, Zirconium and barium chromate, and is ignited from the action of the primer (not shown) and in turn initiates burning of the magnesium tail section 20.
I claim:
1. A tracer projectile comprising,
a metallic front portion including a body portion,
a nose portion attached to the forward end of said body portion,
a plurality of fins attached to the rearward end of said body portion,
a magnesium rear portion, said rear portion being in axial alignment with and connected to said front portion rearwardly of said fins, said rear portion including a tail portion and having a pocket in the rearward end thereof, and
an igniting mixture contained in said pocket to entirely burn away said magnesium rear portion but not said front portion.
2. A projectile of the type described in claim 1 wherein said igniting mixture includes a combustible metal plus oxidizer.
3. A projectile of the type described in claim 1 wherein said igniting mixture consists of zirconium and barium chromate.
References Cited UNITED STATES PATENTS 2,450,892 10/1948 Hale 149-37 XR 2,986,999 6/1961 Fiedler et al. 1- 102-87 3,118,798 1/1964 Winckler 149-37 XR 3,160,537 12/1964 Trafton 14937 3,344,711 10/ 1967 Mawhinney et a1. 3,401,636 9/1968 Ciccone et a1.
OTHER REFERENCES Marks: Mechanical Engineers Handbook, 5th ed., 1951, pp. 609-611.
BENJAMIN A. BORCHELT, Primary Examiner C. T. JORDAN, Assistant Examiner US. Cl. X.R. 102-60
US726010A 1968-05-02 1968-05-02 Tracer projectile Expired - Lifetime US3515072A (en)

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US72601068A 1968-05-02 1968-05-02

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902424A (en) * 1973-12-07 1975-09-02 Us Army Projectile
US3972291A (en) * 1974-11-22 1976-08-03 The United States Of America As Represented By The Secretary Of The Army Extended range tracer folded cup
US4003313A (en) * 1975-06-10 1977-01-18 The United States Of America As Represented By The Secretary Of The Army Projectile
US4123975A (en) * 1976-03-03 1978-11-07 Mohaupt Henry H Penetrating projectile system and apparatus
US5223667A (en) * 1992-01-21 1993-06-29 Bei Electronics, Inc. Plural piece flechettes affording enhanced penetration
US5477786A (en) * 1993-09-08 1995-12-26 Rheinmetall Gmbh Subcaliber arrow projectile
EP0857940A1 (en) * 1997-02-10 1998-08-12 Primex Technologies, Inc. Ammunition canister carrying flechettes and method for loading such a canister

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2450892A (en) * 1944-05-05 1948-10-12 George C Hale Delay powder
US2986999A (en) * 1958-06-03 1961-06-06 Willy A Fiedler Externally mounted, jet-ignited tracking flare
US3118798A (en) * 1961-10-26 1964-01-21 Olin Mathieson Composition and method of forming
US3160537A (en) * 1961-10-12 1964-12-08 Catalyst Research Corp Heating composition
US3344711A (en) * 1965-02-23 1967-10-03 Robert C Mawhinney Javelin stabilized quiet round
US3401636A (en) * 1966-11-30 1968-09-17 Army Usa Clad pyrotechnics

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2450892A (en) * 1944-05-05 1948-10-12 George C Hale Delay powder
US2986999A (en) * 1958-06-03 1961-06-06 Willy A Fiedler Externally mounted, jet-ignited tracking flare
US3160537A (en) * 1961-10-12 1964-12-08 Catalyst Research Corp Heating composition
US3118798A (en) * 1961-10-26 1964-01-21 Olin Mathieson Composition and method of forming
US3344711A (en) * 1965-02-23 1967-10-03 Robert C Mawhinney Javelin stabilized quiet round
US3401636A (en) * 1966-11-30 1968-09-17 Army Usa Clad pyrotechnics

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902424A (en) * 1973-12-07 1975-09-02 Us Army Projectile
US3972291A (en) * 1974-11-22 1976-08-03 The United States Of America As Represented By The Secretary Of The Army Extended range tracer folded cup
US4003313A (en) * 1975-06-10 1977-01-18 The United States Of America As Represented By The Secretary Of The Army Projectile
US4123975A (en) * 1976-03-03 1978-11-07 Mohaupt Henry H Penetrating projectile system and apparatus
US5223667A (en) * 1992-01-21 1993-06-29 Bei Electronics, Inc. Plural piece flechettes affording enhanced penetration
US5477786A (en) * 1993-09-08 1995-12-26 Rheinmetall Gmbh Subcaliber arrow projectile
EP0857940A1 (en) * 1997-02-10 1998-08-12 Primex Technologies, Inc. Ammunition canister carrying flechettes and method for loading such a canister
US5796031A (en) * 1997-02-10 1998-08-18 Primex Technologies, Inc. Foward fin flechette

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