Resources Contact Us Home
Air gun fire time sensor

Image Number 2 for United States Patent #4402382.

A robust air gun fire time sensor consists of a housing to which is secured a protruding nonmagnetic internal barrel having a bore. The bore is closed at one end by a magnetic end cap defining an air chamber and the bore is in fluid communication with the firing chamber of an air gun. A generator coil surrounds the barrel. A bar magnet is floatingly mounted inside the bore and is urged against a shoulder formed in the end cap. When the air gun is charged with compressed air, some of the air becomes entrapped in the air chamber. When the air gun is fired, the entrapped compressed air in the air chamber pushes the bar magnet away from the shoulder. The collapsing magnetic field creates a transient electric pulse in the generator coil.

  Recently Added Patents
Compact light shield for flash photography
Potential separation for filling level radar
Location-based method to specify ratio frequency spectrum rights
Digital X-ray detector arrangement and digital X-ray imaging method
Human activity monitoring device
  Randomly Featured Patents
Electronic still camera with replaceable digital processing program
Pressure activated emergency/temporary seal
Stress treatment device, operating system, and method of making turbine
Nondestructive evaluation of composite materials using acoustic emissions stimulated by absorbed microwave/radiofrequency energy
Method and apparatus for steganalysis of texture images
Microprocessor internally provided with test circuit
Apparatus for scanning sheet-shaped recording medium with a bending roller
Method and apparatus for receiving diversity signals for use in OFDM radio communication system
Incremental validation of key and keyref constraints
Mounting system for a gas turbine engine