Abstract: A mold suitable for casting therein molten metal or other molten materials wherein the mold includes a heat exchange surface, the mold includes means for providing a flow of coolant liquid to remove heat from the heat exchange surface by formation of nucleate vapor bubbles on the heat exchange surface, the liquid tending to include a viscous sublayer adjacent to the heat exchange surface, the improvement wherein the heat exchange surface includes at least one of: means for forming pressure gradients in the liquid having a component perpendicular to the heat exchange surface to facilitate removal of the nucleate bubbles; and means for breaking up the viscous sublayer to facilitate removal of the nucleate bubbles, and wherein the heat exchange surface comprises a series of concave curved surfaces and wherein septum members with corresponding curved surfaces, which may be split to permit positioning into close proximity to the heat exchange surface to provide desired coolant flow characteristics over the surface

Abstract: There is disclosed a compact high power modular RF Semi-Conductor systems package suitable for constructing RF sources of high power and compact size comprising a liquid coolant conduit incorporating side-by-side input and discharge conduits, said conduit attached at one end to a master coolant conduit; liquid cooled microwave semi-conductor device modules comprising input and output liquid coolant connectors at one end and RF output coupling means at the other end, said modules being mounted on two opposing surfaces of said liquid conduit there being multiple adjacent modules in close proximity to each other on each side, and along the length of said conduit, each module having input and discharge liquid couplers fastened respectively to corresponding input and discharge conduits of said conduit, there being RF coupling means mounted on the opposing ends of said module from said coolant connectors, said RF coupling means joining adjacent modules in such manner that the sum of the RF power output of all modul

Abstract: A method for providing an approximately uniform temperature distribution on a cold plate that has at least one of a non-uniform temperature distribution on its heated surface and non-uniform wall thickness separating the heated surface from the generally opposing fluid cooled surface. Low thermal conductivity material is selectively deposited on the fluid cooled surface of the cold plate such that the resulting local thermal resistivity combined with the corresponding local heat flux results in an approximately constant temperature over the heated surface on the cold plate.

Abstract: A liquid cooled melt spin chill casting apparatus suitable for melt spin chill casting of molten metals or other materials wherein a heat transfer rate capability greater than the heat load of the molten material is achieved. Structures produce multiple strands of material and strands of predetermined length. Additionally, the length of time the material is retained in contact with the casting wheel is controlled.

Abstract: There is disclosed a novel high heat flux liquid cooled semi-conductor heat sink structure suitable for mounting semi-conductor chips such as IC's, hybrids, lasers, and power semi-conductors, said heat sink being made of metals, such as tungsten or Molybdenum; ceramics such as alumina, Beryllia, aluminum nitride, silicon carbide or variants thereof or other suitable material such as crystalline carbon, said semi-conductor heat sink structure including at least one surface suitable for bonding one or more semi-conductor chips in intimate thermal relationship thereto, and including a heat exchange surface on the interior surface thereof, said structure providing means for enclosing said heat exchange surface in a liquid tight manner and including means for providing a flow of coolant liquid to remove heat from said heat exchange surface by formation of nucleate vapor bubbles on said heat exchange surface, the improvement wherein said heat exchange surface includes: means disposed on said heat exchange surface f

Abstract: A ferrofluid rotary-shaft seal apparatus of extended seal life suitable for use as an exclusion seal in vacuum or other demanding applications which seal apparatus comprises:(a) an annular permanent magnet adapted to surround the rotary shaft to be sealed and having poles of opposite polarity at each end; and(b) a series of spaced magnetically permeable, pole-piece elements in a magnetic-flux relationship with the one and other ends, respectively, of the permanent magnet, each pole piece having a one end and another end and adapted to surround the rotary shaft to be sealed and to form a cavity there between, the inside diameter surfaces of the stationary magnetically permeable pole piece elements comprising a plurality of spaced magnetic pole piece elements each of which acts as a separate path for magnetic flux there being ferrofluid magnetically captured between the inside diameter of each circular pole piece said ferrofluid breaching the small gap between the inside diameter of said circular pole piece and

Abstract: There is disclosed a liquid cooled stationary anode tube wherein the anode is adapted for irradiation by an energy beam, and includes a heat exchange surface, said tube includes means for providing a flow of coolant liquid to remove heat from said heat exchange surface by formation of nucleate vapor bubbles on said heat exchange surface, said liquid tending to include a viscous sublayer adjacent to said heat exchange surface, the improvement wherein said heat exchange surface includes at least one of: means for forming pressure gradients in said liquid having a component prependicular to said heat exchange surface to facilitate removal of said nucleate bubbles; and means for breaking up said viscous sublayer to facilitate removal of said nucleate bubbles, and wherein said heat exchange surface comprises a series of curved surfaces, each adjacent the next said curved surfaces being generally circular symmetric about the central axis of said anode and wherein septum members with corresponding curved surfaces, w

Abstract: Rotating anode x-ray generating apparatus including a mechanism which utilizes the rotational motion of the anode (20) to increase the effective rate of coolant with respect to the anode heat exchange surface (43).

Abstract: A ferrofluid rotary-shaft seal apparatus of extended seal life suitable for use as an exclusion seal in vacuum or other demanding applications which seal apparatus comprises:(a) an annular permanent magnet adapted to surround the rotary shaft to be sealed and having poles of opposite polarity at each end; and(b) a series of spaced magnetically permeable, pole-piece elements in a magnetic-flux relationship with the one and other ends, respectively, of the permanent magnet, each pole piece having a one end and another end and adapted to surround the rotary shaft to be sealed and to form a cavity there between, the inside diameter surfaces of the stationary magnetically permeable pole piece elements comprising a plurality of spaced magnetic pole piece elements each of which acts as a separate path for magnetic flux there being ferrofluid magnetically captured between the inside diameter of each circular pole piece said ferrofluid breaching the small gap between the inside diameter of said circular pole piece and

Abstract: There is disclosed a liquid cooled stationary anode tube wherein the anode is adapted for irradiation by an energy beam, and includes a heat exchange surface, said tube includes means for providing a flow of coolant liquid to remove heat from said heat exchange surface by formation of nucleate vapor bubbles on said heat exchange surface, said liquid tending to include a viscous sublayer adjacent to said heat exchange surface, the improvement wherein said heat exchange surface includes at least one of: means for forming pressure gradients in said liquid having a component perpendicular to said heat exchange surface to facilitate removal of said nucleate bubbles; and means for breaking up said viscous sublayer to facilitate removal of said nucleate bubbles.

Abstract: There is disclosed a liquid cooled anode x-ray tube wherein the rotating anode is adapted for irradiation by an energy beam, and includes a heat exchange surface, said x-ray tube includes means for providing a flow of coolant liquid to remove heat from said heat exchange surface by formation of nucleate vapor bubbles on said heat exchange surface, said liquid tending to include a viscous sublayer adjacent to said heat exchange surface, the improvement wherein said heat exchange surface includes at least one of: means for forming pressure gradients in said liquid having a component perpendicular to said heat exchange surface to facilitate removal of said nucleate bubbles; and means for breaking up said viscous sublayer to facilitate removal of said nucleate bubbles.

Abstract: In an improved bakeout process for a rotating anode type X-ray tube, the anode, during the course of baking out at temperatures between 500.degree. to 700.degree. C. is rotated by external magnets to prevent cold brazing of the metal lubricant-coated bearing and bearing race.

Abstract: A cellularized radiation sensitive structure is provided in which a laser is utilized to cut narrow slots in a sheet of luminescent material. These slots, usually cut in an X-Y pattern, are then filled with a material which is opaque to either light or radiation or both. This forms a structure having a plurality of individual volumes of luminescent material separated by opaque material. Each of the individual volumes of luminescent material may have associated therewith a photodiode element to produce an electrical signal which is a measure of the light output from that volume.