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
Badge or pin
Methods and devices for multiple-mode radio frequency synthesizers
Efficient location discovery
Dielectric insulation medium
Cooking tray
Transmitter and receiver for streaming media including packet padding
Lubricant supplying device, process cartridge, and image forming apparatus
  Randomly Featured Patents
Method of producing primarily tempered martensite steel
Liquid crystalline-plastic material having submillisecond switch times and extended memory
Method and apparatus for riddling wine in bottles
Apparatus and method for processing a physical layer convergence protocol header
Rolling base for truck cranes
Dual strap system for conversion of bags to backpacks
Work surface information display pad
Percussion instruments using molten or plasticized metal
Interconnect condition detection using test pattern in idle packets
Antisense oligonucleotides which reduce expression of the FGFRI gene