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US 3,938,444 AGranted
Flare cartridge
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsKenneth R. Foote, Michael Mamula
Life of this patent
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Abstract
An improved IR decoy flare is provided which can be reliably fired from a rotechnic pistol. Reliability of ignition is provided simply and easily by inserting a cutting tool into the end of a star bore flare grain for a short distance to produce curled shavings from the inner surface of the grain.
Claims7
The method of producing a flare grain of greater ignition reliability comprising the steps of:
- forming a pyrotechnic mix into a hollow cylindrical segment with a longitudinal bore;
- cutting into one end of said segment along said bore to form curled shavings which remain attached to the surface of said bore.
A flare grain comprising:
- a hollow segment of pyrotechnic material having a longitudinal bore;
- a partial counter bore in one end of said segment;
- and a plurality of cut curled protuberences in said counter bore.
Dependencies are inferred from the claim text.