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 In both embodiments, the pyrotechnic composition and primer remain sealed until the moment the pull-wire is withdrawn and the primer mixture is ignited.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
Continuous geospatial tracking system and method
Nonvolatile semiconductor storage device and a manufacturing method thereof
Methods and apparatuses for configuring and operating graphics processing units
Fuser member having composite outer layer
Random sampling for geophysical acquisitions
Power control arrangement for long term evolution time division duplex method and apparatus
Vehicle-mounted camera stabilized passively by vibration isolators
  Randomly Featured Patents
Method for producing non-grain oriented electric sheet steel
Optimizing post-combustion nitrogen oxide and sulfur dioxide reductions and improving combustion efficiency in coal fired boilers
Vehicle drivetrain including viscous clutch
Adsorbent and process for the separation of meta-xylene from aromatic hydrocarbons
Process for the preparation of 1,2-dichloroethane by oxychlorination
Apparatus for demonstrating and studying the operation of a fuel cell
Abnormality reporting device for vehicle and control program
Electrophotographic imaging member with an improved charge transport layer
Oscillating phased-array ultrasound imaging catheter system
Method for making a composite electrode material