Abstract: A cutting machine includes a gun barrel for receiving a projectile. A compression tube is disposed in flow communication with the barrel and includes a piston therein. A reservoir is disposed in flow communication with the tube and receives a first gas under pressure. A second gas fills the compression tube on a front face of the piston. And, the pressurized first gas is discharged into the tube on a back face of the piston to accelerate the piston through the tube for compressing the second gas, and in turn launching the projectile through the barrel to impact a workpiece.

Abstract: A blasting system using the global positioning system (GPS) for timing the detonations for a shaped blast. The blasting system includes a master station including a master GPS receiver for determining a GPS-based time and a master transceiver in communication with several charge control stations. Each charge control station includes a charge control transceiver for communicating with the master transceiver, a charge control GPS receiver for tracking the GPS-based time, and a detonator for detonating an explosive charge. In operation, the master transceiver uses the GPS-based time determined at the master station for computing detonation times and transmits these times to the charge control stations. The charge control stations then detonate the respective explosive charges when the GPS-based times determined at the charge control stations match the detonation times.

Abstract: The invention and disclosure is directed to improvements for a pressure gun utilized to propel paint containing balls which will, when they strike, break and apply paint to a target or, as utilized in the sport of Paint or Splat Ball, an opposing player, to identify such person as having been hit and therefore out of the game. The improvements include both a retro-fit and a custom adapted monitor with visual readout for counting the number of balls which have been shot by sensing pressure drop, or through Hall effect sensing, or mechanical switch actuation; the latter two sensing propelling bolt movement. The monitor also includes a visual readout for reverse timing to show the player game time remaining and a tank pressure supply readout which will show the player remaining tank pressure. Through microprocessing of the information of shot count and time remaining or elapsed, a shooting rate is determinable.