94 lines
4.0 KiB
Plaintext
94 lines
4.0 KiB
Plaintext
Exploding Target.
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Patented 12 February 1985, US patent number 4,498,677. The patents
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abstract is as follows: An explosive target for firearm marksmanship
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has a hollow rectangular block-shaped body assembly including an
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internal bore containing an explosive charge which detonates upon
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projectile impact. A charge retaining disc forcibly inserted within the
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bore retains the charge adjacent the rear wall of the body assembly. A
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target imprinted on the front wall of the body assembly is coaxially
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aligned with the bore.
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The patent provides that: "Any suitable stable explosive compound which
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will detonate upon projectile impact may be used in practicing the
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invention and there are many well-known commercially available
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explosive compositions which should be suitable for this purpose.
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However, I have found the following formula to be most satisfactory.
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Potassium chlorate 18 Parts by weight
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Sulphur 6 do
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black fine powdered aluminum (400 mesh) 6 do
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Bran 2-2.5 do
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The aforementioned dry ingredients which include discrete loosely
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associated granular components are preferably mixed in dry form to
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produce the explosive charge."
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This 60/20/20 - 3/1/1 combination of Chlorate/Sulphur/Aluminum is
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similar to formula in Shimizu's Fireworks, Thunder #3 (43/26/31), and
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Tenny Davis (2/1/1) page 117. Perhaps the increased percentage of the
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chlorate is to make the mixture more sensitive.
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It should be noted that the actual device may differ greatly from the
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device described in its associated patent as the patent filing date is
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22 March 1983, and changes/improvements may have been made since then.
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The patents cites five other patents as references, they are as
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follows:
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727,419. 1903. Flying target. A round target comprising three discs,
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the inner disc one being a "fulminate" one. "By the term 'fulminate' I
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do not mean only an explosive or detonating substance, since material
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which when hit or pierced will smoke, ignite, or burn more or less
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slowly may be included by such term." There are no suggestions in the
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patent as to what these substance may be composed of.
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1,091,116. 1914. Impact illuminated target for pleasure shooting. "My
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invention consists in a target having its impact-surface treated with a
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flash-light composition igniting on the impact of the bullet to produce
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a circumscribed illumination of the target about the point of impact of
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the bullet upon its surface." "As an example of such a preparation, I
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may instance a composition of chlorate of potash, magnesium and
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collodin applied with an ordinary brush."
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1,145,585. 1915. Target. Small animal figure &c. covered with a "paint
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having therein a small proportion of explosive material, such for
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instance as well-known match-making chemicals, with a component of
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explosive chlorates or the like incorporated therein." The following
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compositions are suggested:
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Yellow flashing
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Red phosphorus 3 Parts.
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Potassium nitrate 2 do
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Antimony sulfid (sic) 1 do
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Glue (5% solution) 1 do
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Red flashing
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Red phosphorus 3 Parts
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Strontium nitrate 1 1/2
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Lithium carbonate 1
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Antimony sulfid 1
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Glue (5% solution) 1
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Green flashing
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Red phosphorus 3 Parts
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Barium nitrate 3
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Antimony sulfid 1
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Glue (5% solution) 1
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If you are thinking of reproducing any of the above composition, make
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me a beneficiary of your life insurance policy first, I could use the
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money!
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4,243,228. 1981. Remotely-perceptible impact-indicating projectile
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target. There are no pyrotechnics involved in this patent.
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These targets are advertised in the Shotgun news, $26.50 per 40 targets
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post paid, form Proven Products, POB 731, Higganum, CT. 06441. The add
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also states that they are "Legal and safe for public use." Lots-of-luck
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trying to convince the local PD your not shooting off fireworks
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