Abstract: An analytical method to determine and control the chemical composition and oncentration of a magnesium anodizing solution consisting of three chemicals, sodium dichromate, ammonium bifluoride and phosphoric acid, such as in Chemical Treatment No. 17 of Dow Chemical Company, for example. Automatic pH titration is used to determine the amount of ammonium bifluoride (NH.sub.4 HF.sub.2) and phosphoric acid (H.sub.3 PO.sub.4) concentration at the same time and the concentration of sodium dichromate (Na.sub.2 Cr.sub.2 O.sub.7.2H.sub.2 O) is determined separately by the thiosulfate titration technique.

Abstract: A liquid filled plastic capsule placed immediately behind the projectile is forced against the projectile base when the propellant charge is ignited. This action ruptures a diaphragm in the forward face of the capsule, releasing the encapsulated liquid and forcing it into the space around the projectile. The resulting liquid film acts as a lubricant and obturator between the projectile and barrel and as a cooling film for the barrel. The ruptured capsule serves as a piston, keeping the powder gases separated from the liquid surrounding the base of the projectile and forcing the liquid to flow between the projectile and the surface of the bore. This results in reducing bore erosion and extending barrel life. The capsule might be placed in the neck of the cartridge in the case of fixed ammunition or attached to the base of the projectile in the case of separate loading ammunition.

Abstract: Stainless steel is "activated" by blasting the metal surface with cast iron rit or cut steel blasting abrasive. Particles of ferrous metal abrasive are embedded in the corrosion resistant steel surface, causing a passive coating to form in a conventional phosphating or oxalating solution. This may be desirable to make the stainless steel surface non-reflective and more corrosion resistant.

Abstract: A spring steel snap ring bearing between the gun barrel and the barrel bushing to remove the relative play therebetween and thus accurately position the barrel relative to the sights on the slide to improve its aiming characteristics. This relative play between the barrel and barrel bushing on the slide is incorporated in its manufacture to permit pivotal as well as longitudinal movement of the barrel relative to the slide containing the bushing.

Abstract: Projectiles exist with a stored electrical charge during flight and an elrically energized detonator which activates upon impact. Premature activation in flight, which can be caused by spurious voltage, is eliminated by the addition of a voltage threshold blocking device. Detonator activation will then occur, as intended, by the voltage released upon impact.

Abstract: A helical lock for an automatic gun operated by a rotating drum wherein a cking ring and mating end of the chamber have helical surfaces, whereby upon rotating the locking ring to locked position, the chamber is snugly urged into the barrel in its battery position and thus prevent gas leakage therebetween.

Abstract: An externally powered carrier for an automatic weapon wherein rotary movement of an electric motor is translated into fore and aft movement of the carrier by means of an eccentrically positioned motor driven pin moving laterally in a transverse carrier cam track.

Abstract: An adjustable length rotary cutting tool extension for a numerical controd machine to adjust the length of a resharpened or shorter tool to match the preestablished length set into the numerical controlled data program.

Abstract: Method and apparatus for actuating a counting device for recording and stng data. The invention comprises an activator for a counter device and includes a mass or weight having an eccentric center of mass which is freely pivotable in one plane in response to an externally applied impulse force of a predetermined magnitude to apply a torque force to a shaft which, on rotation thereof under the influence of said torque force, activates the counter mechanism to record a count. Means are also provided to apply counter torque force of a constant predetermined magnitude or value to the shaft so that the counting device is actuated only in response to a resultant torque force of a predetermined magnitude or value generated by the impulse.

Abstract: In a rotary-cam operated weapon a locking and firing structure that distrtes the firing load symmetrically about the longitudinal axis of the weapon to eliminate nonsymmetrical stresses, and to coordinate the locking and firing timing relationships.

Abstract: A riot control weapon using air pressure to eject inexpensive projectiles om its muzzle. Its velocity, range and impact is adjustable by an air regulator between the compressed air supply and the trigger actuated air valve to suit the needs of the situation. The weapon is a rapid fire rifle, wherein the regulator is adapted to provide instantaneous change to the pressure in the barrel of the rifle while the projectiles are being ejected therefrom, thus changing the range of fire of the rifle.

Abstract: A drum cam for reciprocating the operating group of an externally powered apon, wherein hang-fire is prevented by transferring the cam follower to a separate cam path when the group is in in-battery position, and the follower dwells until a chambered round has fired before permitting the operating group to recoil.

Abstract: Method and article of manufacture for replacing arc spray welding electrode ips which are subject to excessive wear due to heat and friction. In one form this consists of providing an elongated holder for receiving a threaded tip portion and in another form this consists of cutting off and threading a portion of the holder, and interconnecting the threaded tip portion to the holder with an intermediate coupling gas diffuser.

Abstract: A weapon elevating mechanism having an automatic clutch to lock the mecham at preselected elevation yet automatically release it for vertical movement upon actuation of the elevating input structure.

Abstract: A high velocity gun and ammunition wherein the projectile is encased in a formable material which is squeezed in the tapered bore of the gun to more efficiently utilize expansion gases for accelerating the projectile.

Abstract: A hydraulic spring combination to replace a long spring having surging chcteristics in high velocity application with reciprocating parts in automatic and semiautomatic weapons. On recoil a rod penetrates a fluid chamber, causing a piston to move against a shorter spring at a slower velocity proportional to the ratio of rod cross-sectional area to the piston cross-sectional area. The shorter spring returns the piston to move the rod hydraulically to return the reciprocating parts to battery position.

Abstract: A feed pawl antibounce device that prevents jamming of a round feed appars when the pawl clears the round and is moved into position to feed the round from its feed position to its chambering position in front of the open bolt.

Abstract: A machine gun barrel for firing blanks comprising a reclaimed quick discoct barrel with a one piece blank firing attachment with diminished orifice replacing the flash suppressor and threadedly mounted over the barrel end provides gas build-up necessary for gun operation without leakage. Accidental live round firing causes forward, not lateral, fragmentation of the attachment because of its conical bore configuration.

Abstract: This invention comprises an actuator for a mechanical counting device for cording and storing data. This actuator includes a weight having an eccentric center of mass which is freely pivotable in one plane within pre-set limits in response to an externally applied impulse force of a predetermined magnitude to apply a torque force within prescribed limits to a shaft which, upon rotation thereof under the influence of such torque force, actuates the counter mechanism to record a count. Means are provided to apply counter torque force of a constant predetermined magnitude to the shaft, so that the counter is actuated only in response to a resultant torque force of a predetermined magnitude generated by the impulse. Torque limiting means are also provided to permit operation of the counter within an impulse band or range greater than the band or range achievable without use of such torque limiting means.

Abstract: A magazine for a rimfire adapter to feed cartridges into a rifle in which e cartridges are shorter than those for which the rifle was intended. The magazine cavity is positioned rearwardly, in order for the base of the shorter cartridges to be positioned longitudinally in the same position the original cartridge would have been if it were used. This overcomes the double firing safety hazard while suitable ramps and guides are positioned forwardly to guide cartridge travel forward to the chamber.