Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Pull-wire igniter for flares










Image Number 2 for United States Patent #5313888.

The invention includes a pull-wire igniter for a pyrotechnic distress or signalling device which includes a hollow, elongated, tubular body which has a pyrotechnic composition mixture packed into one portion of the body and a small diameter, central passageway is formed through the pyrotechnic composition. A thin elongated plastic center tube is inserted through the central passageway. The outer end of the center tube is recessed at the outer end of the composition. An igniter cup is positioned firmly within the end of the center tube. A pull-wire device extends through the center tube and is exposed at the opposite end of the body so that the user can grasp the pull-wire. The igniter cup is partially filled with an igniter mixture and the end of the pull-wire extends through the igniter cup and is coated with a scratch material. A short section of shrink tubing is positioned over the coated end of the wire to isolate the scratch material. The exposed end of the pyrotechnic composition is covered with an easily ignitable primer material and the outer end of the tubular body is covered with a sealant, coating or membrane to seal the body of the device against moisture or other contaminants. In a second embodiment the igniter system includes a plug formed in the end of the center tube adjacent to the end of the pyrotechnic composition. The end of the pull-wire which passes through the center tube is exposed beyond the plug and is coated with a scratch material and a short section of shrink tubing is positioned over the coated end. Primer material is then formed over the end of the pyrotechnic mixture to completely close and seal the composition. The end of the igniter wire is bent over adjacent to the end of the tube and is then sealed with a membrane or coating to seal the tube against moisture or contaminants. In both embodiments, the pyrotechnic composition and primer remain sealed until the moment the pull-wire is withdrawn and the primer mixture is ignited.








 
 
  Recently Added Patents
Network client validation of network management frames
Optical angular position detection apparatus and method
Antitumoral compounds
Image processing apparatus, image processing system, and image processing method
Light emitting device
Sonic fast-sync system and method for bluetooth
Semiconductor device
  Randomly Featured Patents
Valve for water system
Steam generator parallel back end using pendant primary superheater and baffle wall with gas-tight header vestibule
Bottle portion
Methods for the formation of a silicon oxide film
Process for making disposable absorbent article
Optical fiber with a metal layer to maintain the desired shape of the optical fiber
Recuperation of heat absorbent media to preheat combustion gases and glass batch
Dynamically partitionable parallel processors
Skin clearing and toning device
Haloacetamidines compositions and the herbicidal use thereof