Abstract: The hose assembly, preferably for use as a flexible hose for a vacuum cleaner or the like, includes a pair of side by side electrical conductors helically wound integrally within the hose. Each conductor is doubly insulated. A tubular coupling cuff is screwed onto one end of the hose for coupling the hose to other equipment. The cuff is molded with a recessed area on the inner diameter thereof. Wire connectors between conductors in the hose and wires in an electrical wiring harness are mounted in a strain relief molded onto the harness and mounted in the recess so that when the harness is pulled, the wires thereof will not become disconnected from the conductors of the current carrying hose.

Abstract: Herein described is an electronic control system for guiding a search unit of a nondestructive material tester over sloped or curved surfaces and shapes. More particularly described is the index system used on an indexing-scanning (inspection) device. An oscillator provides a preset number of pulses through an angle rate generator and direction logic to a binary coded decimal pulse counter. The counter keeps track of the input pulses provided thereto (each pulse represents an 0.1.degree. increment) therefore, its contents are indicative of the angle accumulated therein. A pair of read only memories provides the sine function and cosine function of the accumulated angle as a binary coded decimal trigonometric representation of the input angular degree. The signals therefrom control respective Y and Z rate generators whose input clock rate is indicative of the velocity along the curve of the pivot point of the search unit.

Abstract: A cryogenic electrical connector including an elastomeric seal member for use between selected temperatures such as plus 250 degrees F. through minus 452 degrees F. wherein a change in the elastic state of the seal member at a cryogenic temperature to an inelastic state is compensated by the seal member to maintain a desired seal with respect to materials having substantially different coefficients of thermal expansion as compared to the coefficient of expansion of the material of the seal member.

Abstract: An encoder is disclosed for providing an accurate digital representation of the altitude of an aircraft vehicle by comparing an output signal from a pressure transducer which is a function of the barometric pressure at the altitude of the vehicle with an internally generated waveform which represents a curve of altitude vs. barometric pressure on its X--Y axis. The waveform is generated by a closed loop having an integrator circuit for providing the waveform, a comparator, a filter, a voltage controlled oscillator, and a counter, which all maintain the amplitude of the waveform within precise limits. The output signal from the transducer and the wave form from the closed loop are compared by a second comparator to provide a signal which transfers temporary information in the counter to a storage device which provides a coded digital output of the altitude of the vehicle.

Abstract: Connector for tow cable which carries tow tension and electrical circuits permits release of both the tension and the circuits. Electrical connectors in high current circuits are arranged so that the male connector is pulled out of the female electric socket, and the arc between them is elongated, but the arc chamber is closed until the arc is extinguished.

Abstract: A method of making an annular biased frequency interference shielding member having securement tabs for mounting between plug and receptacle shells of an electrical connector, and having folded resilient fingers having base and distal portions respectively engageable with said plug and receptacle shells under resilient pressure engagement. The folded resilient fingers are precisely dimensioned and formed about an axis such that minimal space intervals are provided between adjacent edges of adjacent resilient fingers whereby virtually 360.degree. shielding integrity is afforded.

Abstract: A laser system which produces multiline emissions simultaneously and which is adapted for use in optical data processing systems. In particular, in a first embodiment, a unitary positive column laser comprises two sections, the first section comprising a positive column helium-cadmium laser, the second section comprising a positive column helium-neon laser, the first and second sections being in tandem. Each section may be excited separately such that optimum excitation for red laser light, produced by the helium-neon section, and blue laser light, produced by the helium-cadmium section, can be independently controlled. The present system also allows separate cadmium vapor pressure control by separately controlling the vaporization temperature of the cadmium and also allows confinement of the cadmium vapor whereby the vapor does not contaminate one of the optical windows which confines the active laser medium.

Abstract: A radiation emission device characterized by a cylindrical cathode enclosed by an elongated envelope having a body section and two end sections is disclosed. The device includes an anode terminal, coupled to the body section, which serves to provide electrical energy to excite metallic material inside the envelope. The device further includes a pair of cataphoresis terminals located along each end section to prevent the excited metallic material from drifting into contact with radiation transmission windows located at the terminus of each end section.

Abstract: This invention relates to a printed circuit mother board with card holders attached thereto by means of card holder pins extending through apertures in the mother board, the pins being uniformly crimped to hold them securely for presentation to a solder wave and a machine for producing such a product.

Abstract: Method and apparatus for reducing X-ray dosage required for xeroradiographic examinations without reducing the relative information capacity of the images produced during the examination. In particular, a charged xerographic plate is positioned adjacent the object to be examined and penetrating X-ray radiation is projected through the object onto the plate surface, forming a latent electrostatic image on the surface of the plate. The penetrating radiation utilized is of a substantially lower dosage than normally utilized. The image is then partially developed with developing powder and the partially developed image is then charged and exposed to substantially uniform radiation. The exposed charged image is finally developed by applying additional developing powder thereto resulting in an enhanced image or signal.

Abstract: A xeroradiographic system employing both fringe field and absolute development in order to provide both enhancement of sharply changing boundaries as well as imaging slowly changing borders is provided. This is accomplished by first developing the image with a colored toner in the fringe field i.e. far spaced electroded mode and then developing the electrostatic image in the absolute mode i.e. employing a closely spaced electrode to the latent electrostatic image with a contrasting colored toner.

Abstract: Powder cloud development apparatus for developing latent electrostatic images on an insulating member, such as a photoconductive layer, wherein a cloud of charged developer particles is introduced into the development chamber through a first port in the chamber wall and air is introduced through a second port in the chamber wall opposite said first port. A baffle is positioned above the ports and below the surface of the insulator, the baffle extending between the opposed walls. A development electrode comprising a series of parallel wires, electrically biased in the development area, is connected at each end to a continuous loop drive mechanism, the upper plane of the grid wire being closely spaced from the insulator surface. The wire to wire spacing with respect to wire diameter is sufficiently large to allow the passage of toner therethrough.

Abstract: A method is provided for forming encapsulated particles comprising forming a dispersion of core material in a solution of wall material in a solvent; drowning said dispersion in at least one liquid which is miscible with the solvent and in which at least the wall material is substantially insoluble, to effect phase-separation of said wall material, whereby said wall material deposits about said core material forming a dilute dispersion of particles comprising said core material encapsulated with said wall material in said liquid, and recovering said encapsulated particles from said liquid.

Abstract: A resilient roller is described having a rigid shaft and a flexible sleeve spaced apart by a resilient member to which axial pressure is applied. The axial pressure translates through the resilient member to become outward radial pressure. The roller of the invention is sufficiently resilient across its functional surface to maintain substantial contact and a substantially uniform nip width along its line of axial tangency with a cooperating surface.