Abstract: A delayed blow back bolt action for a firearm includes a bolt and a slide which are movable together in the receiver frame and are disposed for limited movement with respect to one another. The bolt and slide have cooperating camming surfaces which cause a relatively large displacement of the slide in relation to the displacement of the bolt when the forces attendant to the discharge of a round in the firearm are initially applied to the bolt. The bolt is provided with a lug which engages a locking recess in the receiver frame of the firearm, and the lug and recess have cooperating camming surfaces, such that a surface of the recess provides an opposing force to the force generated by the discharge of a round from the firearm, which force is exerted against one end of the bolt. As such a force is supplied to the end of the bolt, the locking lug is forced out of the locking recess, thereby camming the slide in a direction which is along the longitudinal axis of the bolt.

Abstract: A gas turbine combining both monorotor and monostator elements is disclosed. The monostator element is disposed about the inside of the turbine housing and circumferentially about the outside of the monorotor element which is journaled for rotation in the turbine housing.

Abstract: An improved dental instrument for use in cleaning teeth, the instrument having a polishing cup with a self-contained abrasive and a system for automatically supplying a cooling fluid to the polishing cup when the cup is rotated; the cooling fluid serving the additional purpose of lubricating the cup driving mechanism, thereby eliminating the need of packing the driving mechanism in grease and allowing the instrument to be sterilized between uses.

Abstract: A system for detecting turbine compressor surge wherein a transducer produces a signal in response to discharge pressure fluctuations and depending upon the magnitude and frequency of the signals the compressor flow and pressure rise is regulated.

Abstract: An improved fuel injector for a turbine, the injector comprising a conical cup adapted to be rotated and a means for depositing fuel on the internal surface of the cup. When the cup is rotated the fuel is caused to be spread uniformly over the internal surface of the cup as a thin film due to centrifugal force. An air blast is provided externally of the cup and parallel thereto, whereby the fuel reaching the lip of the cup is atomized and directed outwardly at a controlled spray angle. During turbine ignition an air blast is not utilized, thereby allowing a constant spray angle of 180 degrees and permitting the accurate fixed location for the ignition system.

Abstract: A method of fabricating a sandwich structure consisting of a compliant sheet and a rigid sheet, the sheets being separated by a core. The compliant sheet is adapted to conform to the shape of the rigid sheet and the irregularities of the core through the utilization of the compliant sheet as an integral part of the tooling to provide a self-contained vacuum bag, wherein the compliant sheet is caused to be formed into intimate contact with the core.