Abstract: An electron emitter assembly, and methods of assembly, is disclosed. The emitter assembly includes an electron emitter that is secured to a support device in a manner such that the emitter is substantially thermally isolated from the support device.

Abstract: An electron emitter assembly, and methods of assembly, is disclosed. The emitter assembly includes an electron emitter that is secured to a support device in a manner such that the emitter is substantially thermally isolated from the support device.

Abstract: An X-ray tube device and a method for construction thereof which provides the cathode assembly and the anode assembly in a nose of the X-ray tube, wherein an emitter face of each assembly is directed toward an X-ray emission end thereof. The electrons emitted from the cathode assembly travel along a path outward until striking the anode assembly which then generates the X-rays which are directed toward a beryllium window in the X-ray tube. This advantageous structure enables the anode-to-window distance to be small, resulting in a large X-ray flux towards a sample. Furthermore, the small nose of the X-ray tube enables a fluorescence detector to be positioned in an optimal location because the X-ray tube's shape does not displace the fluorescence detector.

Abstract: The present invention provides an X-ray generating apparatus with a shield structure having an electron beam collimating aperture and heat transfer device. The shield structure is made of thermally conductive material and placed in the discharge space between an electron source and rotating anode target. The shield structure is formed by a concave top surface facing the electron source, a flat top surface facing the anode target, and inner and outer walls wherein a linear dimension of the inner wall is substantially smaller than the linear dimension of the outer wall. The inner wall surrounds the beam collecting aperture. The heat transfer device is placed in a beveled portion of the shield structure. The heat transfer device includes an extended coiled wire formed from thermally conductive material and conductively attached to the knurled interior of the shield structure to transfer heat to the cooling liquid passing through inflow and outflow chambers of the shield structure.

Abstract: A heater for an indirectly heated vacuum tube cathode is formed of anisotropic pyrolytic graphite in which current passes through the graphite in the "c" direction.

Abstract: A mammography X-ray tube providing increased X-ray intensity for shortening patient exposure times to eliminate motion artifacts. The cathode design permits superpositioning of electron beam from multiple filaments.

Abstract: An improved metal center rotating anode x-ray tube is shown. The improved x-ray tube includes means for preventing the build-up of charge on the anode glass portion of the tube envelope where the glass flares by constraining the equipotential lines of the electric field in the vicinity of th eflare to parallel the flare surface. Parallelism may be achieved by (1) controlling the angle of the flare and sealing the flare directly to the metal section, (2) modifying the anode rotor to include a flare conforming to the glass flare, and (3) including a ground plane screen in the tube housing.

Abstract: Disclosed are a method and apparatus for rapidly heating a thermionic vacuum tube cathode, thereby enabling the vacuum tube to be placed in useful operation shortly after the tube is switched on. Rapid heating of the cathode is achieved by passing current through the cathode, thereby directly heating it. Simultaneously, the cathode is also heated by an indirect radiant heater and by electron bombardment by electrons emitted from the heater. When the cathode reaches its operating temperature, the direct heating current and the electron bombardment are stopped and the cathode is maintained at its operating temperature by the indirect heater alone. Cathode warm-up times of less than 1 second may be attained using this invention.

Abstract: An improved hermetically sealed disk file is disclosed in which the axis of rotation of the disk spindle and the longitudinal axis of a surrounding cylindrical housing are positioned transverse to one another so that cross-sectional diameter of the housing need be only slightly larger than that of the disks mounted on the spindle.

Abstract: A movable head disk file is disclosed in which the disk enclosure is hermetically sealed to prevent contamination from the surrounding atmosphere from adversely affecting the head-disk interface relationship. The heat that is normally generated in the enclosure from the electrical components and as a result of the friction between gas molecules in the container and the surface of the rotating magnetic disks is transferred from the enclosure through the baseplate of the file to a thermal conduction module disposed outside the disk enclosure. The thermal conduction module is water cooled by a closed loop circulating system. The temperature of the enclosure is, therefore, controlled since the heat generated in the file is transferred to the thermal module through the baseplate which is in a thermal conducting relationship to the thermal module, whose temperature, in turn, is controlled by the velocity of the water circulating through the module.

Abstract: A hermetically sealed, helium filled magnetic disk storage file is disclosed in which a thin walled container encloses the disk file. The container body is clamped between the baseplate of the file and an external mounting bracket which mounts the file to a frame so that the container "floats" relative to both the frame and the baseplate. A double-seamed visco-elastic seal is employed for attaching the cover of the container to the container body.

Abstract: Printing apparatus for producing collated sets of duplex printed sheets. The apparatus includes an input sheet feed path for feeding sheets to an electrophotographic imaging apparatus to print one side of a print sheet and an output sheet feed path to feed the sheet from the imaging apparatus to an output stacker. A duplexing sheet feed path can be selectively actuated to divert the sheet from the output path to flip the sheet as the sheet is continuously fed back to the input sheet feed path to print the image on the other side of the sheet. The apparatus is designed to print a plurality of sheet sizes by selective control of pressure and vacuum forces.