Abstract: A method of sensing or measuring various characteristics of blood is disclosed. The method includes providing a sensor having an emitter and a receiver coupled to external processing apparatus. The sensor has a generally elongated configuration designed to be formed into a generally U-shaped orientation so that the sensor can be positioned over the skin of a patient adjacent the patient's mouth with the emitter and receiver in an aligned orientation on opposite sides of the skin. One of the emitter and receiver is positioned against the skin outside of the mouth and the other is positioned against the skin on the inside of the mouth. The sensor is used to sense or measure at least one selected characteristic of the blood of the patient.

Abstract: An electronic component deactivation device including an electric match having a pair of electrical leads with a bridge wire coupled therebetween and a pyrotechnic layer of material contacting the bridge wire. A destructive charge is positioned in overlying relationship to the pyrotechnic layer, adjacent the bridge wire with at least a portion of the destructive charge contacting the bridge wire. The destructive charge and electric match are mounted in a housing with the pair of electrical leads extending externally of the housing for connection to an external circuit. The housing is constructed so as to mount the destructive charge and electric match on a circuit board or the like.

Abstract: A flat electric match includes a substrate having a surface. A first electrical lead and a second electrical lead each having an end, are carried by the substrate on the surface. The ends of the electrical leads are spaced apart on the surface. A bridge wire is coupled between the ends of the electrical leads and carried by the substrate on the surface. A pyrotechnic material is carried by the substrate on the surface, with at least a portion of the pyrotechnic material contacting the bridge wire.

Abstract: A detachable gun barrel assembly having an adapter for threaded engagement with the receiver and a barrel dimensioned for affixation to the adapter. The adapter has a mating end section which threadedly engages the receiver V-threads and a receiving end section having square internal threads. The mating end section has a limit flange at its innermost end. The receiving end section has a larger internal diameter to form an internal flange or stop between sections. The barrel has an alignment section which inserts into the mating end section and contacts the limit flange. A securing section of the barrel is provided with a square external thread to engage the receiving end section and contact the internal flange. The elongated barrel is provided with an external shoulder which contacts the receiving end section upon affixation of barrel to adapter thereby providing a number of stops to maintain barrel alignment.

Abstract: A modified barrel for an automatic weapon having a muzzle attachment including a gas expansion chamber to permit use of a short barrel while delivering the normal pressure to the gas drive mechanism. The attachment delivers the gas pressure via a conduit from the chamber to an exit port coupled to the gas drive mechanism of the weapon.

Abstract: A gas chamber fixture having attachment to the barrel of a gas-operated weapon wherein the barrel and the weapon are mechanically attached by means of a mating mortise and tenon. A bead is received in recesses formed in the adjacent surfaces of the mortise and tenon to facilitate rotation during attachment and provide sealing engagement of the joined parts. A gas passage between barrel and chamber is provided through the bead to provide the driving force to the drive mechanism located in the chamber.

Abstract: A sight mount for interchangeable sighting devices which provides adjustable eye relief and improved stability. The base, affixed to the receiver, is provided with parallel guideways to receive a slide support. Midway on the base is a vertically movable block which frictionally engages the slide support to lock it into position at the desired distance from the eye. A separate slide support is used for each scope for ease of interchange.

Abstract: A boresight for determining the accuracy of a gunsight wherein a cartridge-shaped housing is dimensioned to fit within the gun chamber. A laser is contained in the housing. A switch is positioned in the end surface of the boresight housing to be contacted by the bolt face of the gun. The switch contains an indentation to receive the firing pin when the bolt face contacts the switch to activate the laser and illuminate a distant spot.