Abstract: A method and apparatus for initiating a stable plasma and maintaining the asma stationary. A high power, continuous wave laser is used to initiate and maintain the plasma, while a magnetic trap confines the plasma.

Abstract: In a pinion-rack drive system, an auxiliary lock mechanism for the movable omponent, said lock mechanism including a second rack normally not meshed with the pinion drive gear but potentially meshable therewith when the pinion gear is moved axially parallel to the teeth on the racks. Lock action involves axial adjustment of the pinion gear so that the gear has opposite ones of its teeth (on the gear diameter) locked in the rack teeth, thereby precluding rotation of the pinion gear and translation of the pinion gear along the rack system.

Abstract: Helicopter rotor blades require tip weights for spanwise and chordwise bace to assure that all of the blades rotate in the same track. The improved rotor blade tip weight assembly of the present invention comprises an elongated spar, preferably formed of a reinforced plastic, adapted to be connected at one end thereof to a rotor hub. An aft fairing structure is carried by the spar and a balancing weight assembly is bonded and/or cured in place within the spar, proximate the free end thereof. The balancing weight assembly includes, in the preferred form thereof, a fiberglass weight tube housing having a pair of internally threaded weight tubes positioned therewithin. The weight tubes form bores having longitudinal axes in a common, substantially horizontal plane, and the axes each extend in a direction parallel to the axis of the spar. One or a plurality of externally threaded cylindrical weights are locked in each weight tube during balancing of the rotor blade.

Abstract: A device is disclosed for amplifying electromagnetic waves propagating al a meander line slow wave structure by means of magnetic cylindrical domains or bubbles which are propagating at substantially the same velocity as the RF wave in an adjacent platelet of orthoferrite having associated with it a propagation arrangement of the conventional type which is adapted to move the domains from one end of the platelet to the other. Since the magnetic bubbles are magnetic dipoles that produce magnetic surface charges, a portion of their energy is transferred to the propagating RF wave, resulting in amplification of the RF wave.

Abstract: An improved method for preparing a "plasticized" red phosphorous smoke ag through the steps comprising mixing particulate red phosphorous with a non-swollen, commercial latex polymer "plasticizer." In the preferred embodiment the latex polymer plasticizer is a butyl rubber.

Abstract: A method and apparatus for generating a variable pulse width code of at lt three binary coded decimal digits at a rate sufficiently greater than the film speed of a movie camera to cause a single light source in the camera to record in a continuous sequence all the bits of the three digits on the edge of a film in the camera adjacent each frame.

Abstract: A relatively compact, inexpensive and portable viewer for reading photogric reductions, such as microfiche film cards, includes a cylindrical translucent diffuser tube which provides for entry of sufficient light under usual ambient conditions for viewing the film; a transparent cylindrical mounting tube axially centered within the diffuser tube; and a slide tube axially and longitudinally movable, by hand operation, within the transparent mounting tube. The slide tube forms an optical path comprising a rectangular opening in its wall near one of its ends which acts as a film gate, a reflecting mirror positioned in line with the wall opening, a magnification lens and an eyepiece lens. The film is inserted in the cylindrical gap formed between the diffuser tube and the mounting tube and the slide tube is moved so that the desired portion of the film may be viewed, enlarged and read.

Abstract: A method for pressure testing a rocket motor case by inserting a movable ton in the nozzle end of the rocket motor case, sealing the piston relative to the throat of the rocket motor case and then applying pressure to the rocket motor case to pressure test the rocket motor case to a predetermined pressure or to failure.

Abstract: A film projector system including a sealed film cassette removeably mounted ithin an aperture in the projector and driving means in said projector mechanically engaging coupling means extending through said cassette for driving the sealed film between hubs sealed in said cassette intermittently past a film projection location in said cassette and continuously past a sound detection location therein, with the projection plane of the film at said projector locations being disposed normal to the projector optical projection optical sound beams and twisted ninety degrees with respect to the plane of that portion of the film wound on said hubs so that the projector beams do not pass between the film hubs.

Abstract: Disclosed is a method of synthesis and the compound synthesized B.sub.10 ub.12 [(CH.sub.3).sub.2 S].sub.2. The method employs the starting compound (R.sub.4 N).sub.2 B.sub.10 H.sub.10, as a source of the ten-boron ion (e.g., B.sub.10 H.sub.10.sup.-2), in which the starting compound, wherein R equals an alkyl with the formula C.sub.n H.sub.2n+1 and wherein n equals 2, 3, or 4, is converted to Li.sub.2 B.sub.10 H.sub.10 by ion-exchange. The Li.sub.2 B.sub.10 H.sub.10 is reacted with HCl in (CH.sub.3).sub.2 S solution to produce the compound B.sub.10 H.sub.12 [(CH.sub.3).sub.2 S].sub.2, a precursor compound for synthesizing carboranyl burning rate accelerators. The precursor compound is reacted with propargyl propionate if the interest is to synthesize carboranylmethyl propionate; 1-octyne to synthesize n-hexylcarborane; or propargyl ethyl sulfide or propargyl propyl sulfide to synthesize carboranylmethyl ethyl sulfide or carboranylmethyl propyl sulfide, respectively.

Abstract: 2,4- AND 2,6- Dinitrobenzenesulfonates, which may contain a methyl group in the 5 position, are reduced with sulfur dioxide in aqueous sulfuric acid medium at elevated temperatures, whereby one or both nitro groups are reduced to a primary amino group and the sulfonic acid group is eliminated.

Abstract: In a ball screw connected between an actuating motor and load, the improvnt comprising a friction brake mechanism carried by the nut section of the screw for automatically locking the nut and screw together when the motor is de-energized. The invention prevents the load from producing dangerously high free-wheeling rotation of the screw that could centrifugally destruct the motor.

Abstract: An efficient electron emitter cold cathode is formed by first placing an ype monocrystalline substrate of about 100 to about 500 microns in thickness in a furnace. The furnace is heated to about 850.degree. C. to about 900.degree. C. and an N-type layer of about 10 to 15 microns of SnO.sub.2 is deposited onto the top surface of the substrate using a suitable carrier gas. Then, a P-type layer of about 10 microns of SnO.sub.2 is deposited on the N-type layer. The furnace is then cooled at a rate of about 10.degree. C. per minute to about 600.degree. C. to form the emitter. The furnace is then cooled to room temperature and the emitter removed from the furnace. The emitter is subjected to etching and polishing to obtain a P-type layer of about 2 to 4 microns, and a nonreactive metal contact is then deposited on the P-type layer. The emitter is then completed by bonding a metal contact to the base of the N-type monocrystalline substrate.

Abstract: A multi-effect passive detonation trap utilizes a manifold having a rectalarly shaped cross sectional area with oppositely disposed off-set pipeline fixedly connected thereto to attenuate an upstream detonation wave. The detonation wave is arrested by providing for maximum containment and self relief of the energy produced, directional control of the reaction, and a manifold configuration which assures extinction of the detonation wave.

Abstract: The configuration consists of two antennae on the same mast. The upper anna is a ground plane capable of two frequency bands of operation. The lower antenna comprises a sleeve and radial elements.The upper antenna consists of four radials 36" long and an upper element. The two bands of operation covered by the upper antenna are 80 MHz and 150 MHz. Band selection is accomplished by selection of the correct upper mast element. This element is removable. A 34" long element is used for 80 MHz operation and a 14" long element for 150 MHz operation. This antenna is nondirectional and is used for transmitting.The lower antenna consists of four radials 22" long and an upper and lower sleeve. The radials are insulated from the mast and connected to the center conductor of the coax. The upper sleeve is a portion of this antenna and also isolates the antenna from the mast. The only use of the lower sleeve is to provide isolation of the antenna from the mast and coaxial cable.

Abstract: An assembly tool utilizes a tubular bar to support and torque a pronged d-shaped work holding member on one end and a socket disposed in a knurled handle end. An alignment wheel is axially fixedly positioned on the bar proximate to the work holding member. A movable alignment ring slidably disposed on the bar intermediate the handle end of the bar and the alignment wheel is used in conjunction with the alignment wheel to help guide, insert and tighten a threaded burster retainer work piece in a projectile case while torque is applied to the tubular support bar.

Abstract: An electromechanical coded actuator, upon receipt of the proper combination f electrical pulses, will unlock and cause angular displacement of an output shaft. The device comprises a rotatable notched flange integral with the output shaft, the former being keyed to the housing by a series of flat blades axially movable against a bias. A first solenoid sequentially positions a rotatable index arm over each blade, whereupon a second solenoid actuates the index arm to displace and lock selected blades in a manner to align a notch in each blade with the flange. The latter is then free to be rotated via a clutch-type coupling with the first solenoid. Additional actuation of the rotary solenoid releases the clutch allowing the flange and shaft to be returned to its original position by a spring bias, and also releases the displaced blades to lock the flange. An electrical switch actuated by the index arm defines the zero position.

Abstract: A compact uniform light diffuser and attenuator is supplied for use with h resolution transparencies and the like, particularly standard resolution patterns.

Abstract: 1. An automatic radar jamming transmitter comprising a plurality of voltatuned magnetrons each adapted to be tuned over a prescribed wide range of frequencies, discrete voltage tuning means in circuit with each of said magnetrons respectively whereby each of said magnetrons initially and simultaneously generate radio-frequency energy at prescribed discrete frequencies, means for simultaneously varying said discrete voltage tuning means in a random manner whereby the discrete outputs of said magnetrons comprise simultaneously generated frequency modulated noise signals, means for amplifying said noise signals, and means in circuit with said amplifying means for producing random changes in the amplitudes of said noise signals.

Abstract: A spherical convex pusher plate member is positioned intermediate the rear end of a subcaliber tubular projectile and the forward section of a cup shaped sabot carrier to improve the ballistic performance of the projectile by reduction of a parasitic weight and faster separation of the carrier after launch. Propellant gas pressures acting on the convex spherical section of the pusher plate causes deflection thereof sufficient to force the sabot to loosen from the projectile to provide an improvement in projectile velocity.