Abstract: A microprocessor-controlled method for implementing jam-resistant “automatic cycling functioning” of an automatic rifle or gun provides faster rate and variable rate of fire, user-selectable burst rate, no gas-loss in muzzle velocity, belt-fed autoloader, and closed-loop control. The method is implemented throughout the eight cycles of functioning (feeding, chambering, locking, firing, unlocking, extracting, ejecting, and cocking) beginning after the loaded magazine has been inserted in the weapon. The microprocessor-controlled in conjunction with other electrical-mechanical subcomponents provides greater performance, reliability, and real-time diagnostics. The present invention with its unique design, results in significant reduction in components making the unit potentially lighter overall in weight.

Abstract: A portable measuring system for making a series of thickness measurements of a material such as an aircraft skin and for determining therefrom the sizes and quantities of standard size fasteners required for fastening the material. For each measurement, a fixed probe is inserted through a hole in the material so as to engage an inner surface of the material, and a slidable probe engages an outer surface of the material to measure the material's thickness. Each measurement is compared to a table stored in associated data processing equipment to relate the measured thickness to the applicable standard fastener size. The sizes and numbers of standard fasteners required are accumulated over the series of measurements and displayed to the user.