The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 18, 1986
Filed:
Aug. 28, 1985
Jacqueline C Meador, Huntsville, AL (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A method of fabrication of expandable polystyrene plastic ignition contai is disclosed which yields an electric squib case and an ignitor charge case which can be easily loaded with a pyrotechnic charge and an ignitor charge respectively, and when in combination, serves as the ignitor system for a high length to diameter flight motor. The method of fabrication employs expandable polystyrene beads in a first predetermined amount of polystyrene beads which are first pre-expanded to about three times their original size. A second predetermined amount of expandable polystyrene beads are combined with the pre-expanded beads; the combined beads are added to a mold of the desired shape; and the mold is placed in a steam chamber to expand the combined beads to form either the squib case or ignitor charge case. The squib case and the ignitor charge case when mated as an ignitor system for a rocket motor each has the weight, density, and strength to remain in tact during an ignition phase but subsequently breaks up into small pieces which does not inflict damage to propellant in the rocket motor or cause plugging of nozzle when in operation.