Abstract: An air brake includes a service brake chamber which actuates a push rod. A collet brake chamber is partially defined by a collet brake diaphragm. A locking collet is mounted to the collet brake diaphragm and includes a bore through which the push rod passes. A collet brake spring biases the collet into a tapered collet hole to clamp the collet onto the push rod to prevent the movement of the push rod toward the brake off position. Application of pressure to the collet brake chamber overcomes the force of the collet brake spring and moves the collet away from the tapered collet hole to allow the push rod to move freely. Excessive force on brake drums, caused by cooling and contracting brake drums while parked, can be reduced by permitting the collet and push rod therewith to deflect when such excessive force occurs.

Abstract: An oil seal disposed between a device having a rotary shaft and the rotary shaft. The oil seal comprises an annular supporting member supported within the fixed structure of the device and an annular elastic sealing member disposed in contact with the outer peripheral surface of the rotary shaft in such a manner as to allow relative sliding rotation therebetween. The annular supporting member has a peripheral supporting portion with a cup-shaped section taken along a plane including the axis of the rotary shaft, and the cup-shaped section opens to the outside of the device in the axial direction thereof. The annular elastic sealing member is fixed to an annular, radially-inwardly projecting portion of the annular supporting member.

Abstract: A herbicidal suspension concentrate characterized by comprising from 0.5 to 20 parts by weight of at least one compound selected from among sulfonamide compounds represented by the general formula (I). ##STR1## (wherein X is a hydrogen atom, a chloride atom, a bromine atom, a methyl group, or a difluoromethyl group) and their salts as an active ingredient, from 55 to 94.5 parts by weight of a vegetable oil, and from 5 to 25 parts by weight of a surfactant.

Abstract: A method for inhibiting acid corrosion of metal well equipment which comprises introducing into an aqueous acid solution an inhibiting amount of a quaternary compound prepared by reacting a tertiary aromatic heterocyclic amine with a (halo-substituted-aryl) alkyl halide, and contacting the well equipment with the inhibited aqueous acid solution.

Abstract: A magnetic recording medium comprising a non-magnetic support, a magnetic layer, and an undercoat layer provided therebetween, and said undercoat layer comprising: (A) at least one resin selected from the group consisting of polyester resins having one or more hydroxyl groups and polyurethane resins having one or more hydroxyl groups; (B) a polyisocyanate compound (C) at least one compound selected from the group consisting of organometallic compounds and tertiary amine compounds; and (D) carbon black having an average single particle size of 50 .mu.m or smaller and an oil absorption of 100 g DBP/100 g or less; and having an (A)/(D) content ratio of 30/70 to 70/30, by weight, a (B) content of 15 to 50 wt. % based on component (A), and a (C) content of 0.5 to 5 wt. % based on component (A).

Abstract: The quaternary salts of rigidized 1,3-oxazole compounds of the formula: ##STR1## where R is either H or CH.sub.3 O. The compounds are produced in a modif Robinson-Gabriel synthesis of oxazoles. These dyes are used in solution with non-interfering polar solvents, such as ethanol and H.sub.2 O, to form lasing media useful in dye lasers.

Abstract: There are provided substituted p-phenylene diamines of the formula ##STR1## wherein Ar is phenyl or phenoxyphenyl.

Abstract: Data is obtained for use in diagnosing the characteristics of a beam of ionizing radiation, such as charged particle beams, neutral particle beams, and gamma ray beams. In one embodiment the beam is emitted through the atmosphere and produces nitrogen fluorescence during passage through air. The nitrogen fluorescence is detected along the beam path to provide an intensity from which various beam characteristics can be calculated from known tabulations. Optical detecting equipment is preferably located orthogonal to the beam path at a distance effective to include the entire beam path in the equipment field of view.

Abstract: A vacuum switch with an isolated trigger probe which is not directly connected to the switching electrodes. The vacuum switch within the plasmatron is triggered by plasma expansion initiated by the trigger probe which travels through an opening to reach the vacuum switch elements. The plasma arc created is directed by the opening to the space between the anode and cathode of the vacuum switch to cause conduction.

Abstract: A radial electric field of a desired magnitude and configuration is created hroughout a substantial portion of the cross-section of the plasma of a tokamak. The radial electric field is created by injection of a unidirectional electron beam. The magnitude and configuration of the radial electric field may be controlled by the strength of the toroidal magnetic field of the tokamak.