Abstract: A nitrogen oxide scrubbing process comprises the step of contacting effluent containing nitrogen oxide with an aqueous alkaline peroxide solution. The process may take place in scrubbing towers where the aqueous solution flows countercurrent to the effluent.

Abstract: An improved detonator assembly for a black powder firearm having a breech block, a receiver, and a nipple. The detonator assembly comprises a primer and a primer carrier. The primer carrier has an axial bore dimensioned to receive the primer at one end and slip over the firearm nipple at the opposite end. The primer carrier has a lip that abuts the breech block rear end. A tab laterally extends from the lip to provide a handle for installing and removing the assembly and a visual indication that the firearm is primed.

Abstract: An improved firearms barrel assembly having a cartridge chamber insert disposed in the butt end of a barrel and a pin for locking the insert in the barrel. The insert has a plurality of longitudinally extending grooves for equalizing pressure across a cartridge case. The multi-component construction of the assembly facilities production of the grooves.

Abstract: A two stage trigger assembly for a firearm employs a pivotally mounted searprop. The searprop is selectively pivotally coupled with the trigger. Upon actuation of the trigger, the searprop initially in a first stage remains fixed relative to the sear. In a second stage, the trigger catches the searprop to pivotally force the searprop to release from the sear to fire the firearm.

Abstract: A firearm safety for a firearm comprises a bracket mounted at the underside of the receiver. The bracket defines a pair of recesses for receiving detent shoulders of an operator arm. The bracket is spring-biased to permit the operator arm to be manually pivoted in snap-type fashion into one of the two recesses. The operator arm engages the trigger in one pivotal position to prevent actuation of the trigger.

Abstract: Herein described is apparatus for sealing cartons and containers, which includes using a laser beam directed at critical areas on the carton or container for inducing constant heat upon the area of a carton or container passing in front of the beam. Further described is a beam splitting system which splits the laser beam to direct it to different areas on the container being sealed or to different cartons simultaneously.

Abstract: Action disabling device in a firearm having among its conventional components a spring-closed breech bolt, a tubular magazine, and a pivoted cartridge lifter. The disabling device is in the form of an operating arm pivoted with one end to a fixed part of the action so as to be swingable with its other end into active and inactive positions in which the same is in and out, respectively, of the closing path of the breech bolt, and is normally spring-urged into its inactive position, with this operating arm being, on overtravel of the lifter in lift direction for lack of a cartridge thereon, engaged and taken along by the lifter into its active position to stop the breech bolt on partial closure of the same. The operating arm is one of the arms of a double-arm lever the other arm of which projects to the outside of the receiver and is there accessible to an operator's finger for swinging the operating arm to its inactive position.

Abstract: Method of forming a cartridge chamber in the bore of a firearm barrel, which comprises driving into the bore of the barrel from the butt end thereof a mandrel of the surface configuration of the peripheral wall and mouth of the cartridge chamber, whereby the bore metal is squeezed into close form-fit with the mandrel, and then retracting the mandrel from the barrel bore.

Abstract: A free-floating self-contained swimming pool alarm unit in which a hollow housing forms a float structure having an internal chamber within which an audible alarm device is mounted adjacent sound transmitting openings in a top wall of the housing. An upstanding flared chimney surrounds the openings and provides a sound amplifying horn, the outer end of the chimney being provided with a shielding cap. Electronic control is arranged to trigger and activate the alarm device by connecting it to an electric source in the housing in response to the operation of a liquid sensor switch as a result of tilting movements of the housing due to wave disturbances produced by an object or person falling into the pool. Once the alarm is triggered, it will continue to operate until deactivated by an appropriate switch such as a manual switch mounted in an accessible portion of the housing.

Abstract: An electronic lock mechanism in which the odds against picking or unauthorized opening are extremely high, and wherein an electrically operable bolt is connected with the output of an oscillator in the bolt control circuitry that includes a resistance bridge network including regenerative differential electronic switches connected to selectively activate a pair of relays with series connected contacts in accordance with the direction of unbalance of the bridge, and to activate both relays in response to a balanced operative mode of the bridge so that the relay contacts will coact to close a power supply connection to the oscillator. A control key insertable in a mating keyhole is operative to connect the bridge with a voltage source, insert a resistor component into the bridge network of a value to balance the bridge, and also place a resonating capacitor into a tuned circuit of the oscillator and thereby activate the lock bolt to an unlocked position.

Abstract: An improved detonator assembly for a black powder firearm having a breech block, a receiver, and a nipple. The detonator assembly comprises a primer and a primer carrier. The primer carrier has an axial bore dimensioned to receive the primer at one end and slip over the firearm nipple at the opposite end. The primer carrier has a lip that abuts the breech block rear end. A tab laterally extends from the lip to provide a handle for installing and removing the assembly and a visual indication that the firearm is primed.