Fecha de publicación: 03/08/1976 Fuente: WIPO "pollen" Tracer projectile having an enlarged diameter cavity wherein pyrotechnic cer mixture therein is caused to end-burn sequentially in opposed directions by means of a folded cup-shaped device to thereby extend the duration of visibility and improve the quality of downrange visibility of the tracer and yet permit ballistics of the projectile to remain unaffected. -GOVT PAR The invention described herein may be manufactured, used and licensed by or for the Government for governmental purposes without the payment to us of any royalty thereon.