Abstract: An induction motor rotor particularly for x-ray tube applications comprises a series of hollow cylinders fitting concentrically on each other and on a motor shaft. The first cylinder is a highly heat resistant and electrically insulating material. The next cylinder is a highly magnetic material cylinder fitting on the first cylinder. The next and outermost cylinder is an electrically conductive material providing the armature conductor of the induction motor rotor.
Abstract: X-ray tube electron beam focusing utilizing a cathode having a large cavity therein in which an electron cloud is generated and which is shielded from the primary electric field between the cathode and the anode. The electron cloud flows from the cavity through a small narrow passage and into the primary electric field. An opposed spaced apart pair of electrical grids each comprising an array of individual electrode segments have selected opposed segments electronegatively biased to change the cross-section of the passing electron stream therebetween. The altered cross-section of the electron stream determines the size of the focal spot of the electron beam impacting the target anode.
March 21, 1996
Date of Patent:
May 27, 1997
General Electric Company
Stephen W. Gravelle, Steven D. Hansen, Karl F. Sherwin
Abstract: A strap latch device for securing a medical patient to the side rails of an examining or treatment table includes a pair of extending opposed claw arms, one fixed and the other spring biased to rotate towards the fixed claw arm with the arms overlying a rectangular recess in the latch between the arms. A lever is used to overcome the bias and separate the claw arms so that one edge of a side rail fits into the fixed claw arm and rotation of the latch on the rail projects to the moveable claw arm over the side rail with the side rail fitting closely into the defined recess. Upon release of the bias lever the side rail is grasped by the claw arms with projecting lips on the claw arms securing the rail into its recess. Patient motion and belt tension will tend to accentuate latch retention.
May 3, 1994
Date of Patent:
July 18, 1995
General Electric Company
Jonathan C. Boomgaarden, William O. Schoenbeck
Abstract: An induction motor rotor unit adapted to support and rotate an X-ray target anode in an X-ray tube comprises a stacked array of very thin highly magnetic annular laminations on a cylindrical carrier. Gold plated copper conductor bars are placed in longitudinal coaxial slots in the circumference of the rotor. Gold plated end rings on the carrier abut each end of the stacked array and conductor bars. In a vacuum furnace the gold plating is caused to melt and diffuse into contiguous components to bond the rotor as an integral unit.
Abstract: An x-ray tube having a rotating anode structure which comprises a circular titantium, zirconium, molybdenum alloy target section bonded to a graphite disc. The target section is coated with hefnium carbide as a heat emissivity barrier. The thickness of the barrier is preferably in the range of 4.0-5.0 .mu.m.
Abstract: A closed cell polyolefin foam ring member serves as an oil volume expansion compensator in a high voltage electrical cable connector of an X-ray tube in which a supply of oil expands under high temperature and compresses the ring for an increase in volume for the expanding oil.
Abstract: A rotating anode target for X-ray devices comprises a circular graphite disc structure both of whose front and back sides or faces taper equally towards each other and define a narrow rim surface and central hub section. A larger area of the front face is coated with a focal track metal which extends coextensively over the front face to overlap part of the rim surface. The slant height dimension of the focal track metal is greater than the diameter of the hub section.
Abstract: An x-ray beam stop for high energy x-ray devices comprises a laminate structure of multiple layers of different Z materials which may include lead (Pb) and arranged in progressive Z order for a predetermined x-ray detector orientation.
Abstract: A Belleville spring/ball combination is utilized in a rotating anode target bearing assembly in an X-ray tube for thermal and electrical conduction as well as self-centering of the target shaft and noise reduction.
Abstract: A flexible elongated slatted grid structure is suspended between a pair of spaced apart grid support frames each of which is adapted for rotation about a transverse axis intermediate the suspended ends of the grid. Mechanical adjustment means provides equal but opposite angular motion of the frames to curve the grid along a circular path.
October 19, 1992
Date of Patent:
March 1, 1994
General Electric Company
Gary J. Thumann, Jonathan C. Boomgaarden, Daniel P. Miller
Abstract: A tool holder clamping and unclamping device utilizes a special combination of a Belleville spring biased bolt threading device to actuate a ball detent mechanism to lock a tool holder in the device.
Abstract: A coated carbide insert has a cobalt enriched zone at one decarburized surface, and a thin TiN transition layer over this surface. The cobalt enriched zone and the TiN layer cooperate to support additional thicker layers of hard wear resistant material such as TiC, TiN, and Al.sub.2 O.sub.3.
Abstract: There is disclosed a fluid comprising a mixture of about 5 percent to about 40 percent by volume of a halogenated benzene and about 60 percent to about 95 percent by volume of an alkyl branched chain phthalate ester, said fluid having a dielectric constant greater than the dielectric constant of either of the halogenated benzene or the alkyl branched chain phthalate ester. The dielectric constant of an alkyl branched chain phthalate ester having a dielectric constant above about 4.0 is increased by mixing a halogenated benzene having a dielectric constant above about 4.0 with the alkyl branched chain phthalate ester whereby the measured dielectric constant of the alkyl branched chain phthalate ester having the halogenated benzene therein, is at least 0.25 higher than the dielectric constant of either the halogenated benzene or the alkyl branched chain phthalate ester. The preferred halogenated benzene is trichlorobenzene, and the preferred alkyl branched chain phthalate ester is di-2-ethylhexylphthalate.
Abstract: A high stress corrosion resistant metallized capacitor is disclosed having at least one electrode consisting of a metallic bilayer vapor deposited on a dielectric strip. In a preferred embodiment, a layer of aluminum is covered by a second metal layer which is between about 1/6 to 1/12 the thickness of the aluminum layer and is continuous throughout. The aluminum layer extends beyond the second layer in a marginal area.
Abstract: An electrical capacitor is disclosed comprising a doubly metallized electrode and a metal foil electrode interleaved with a dielectric material. In a preferred embodiment the electrodes and dielectric comprise strips formed into a roll wherein, at each end, one edge of an electrode protrudes beyond the edge of the other electrode and defines a planar roll end. A coating of metal is applied at each roll end to form electrical connections with the protruding electrode edges. The edge of the other electrode is protected from stray particles of the coating applied at each end by a barrier comprising a selected recess distance and/or shielding provided by the dielectric strip.
Abstract: The bond between a hard wear resistant coating of Al.sub.2 O.sub.3 and a cemented carbide substrate is greatly improved by means of a more effective interlayer of TiO. The TiO layer is provided by means of a reduction process from other titanium oxides such as TiO.sub.2.
Abstract: Improved ceramic compositions useful for cutting tools and the like are described. They are composed of an essentially homogeneous admixture of sintered powders of an aluminum oxide base material with other refractories including zirconium oxide, titanium oxide, hafnium oxide, titanium nitride, zirconium nitride, and tungsten or molybdenum carbide. In addition to their common and improved properties of hardness and strength, many of these compositions may be made by simple cold-pressing and sintering procedures. This avoids the known drawbacks of conventional hot press production.
Abstract: A cutting insert includes a planar body member formed unitary with peripheral ledges of smaller width than the body member, with the ledges being configured and aligned relative to the body member to achieve desired rake angles, both axial and radial as well as the clearance angle desired of the cutting geometry. In operation, each elongated ledge defines the cutting edge of the cutting insert and during operation of the cutting insert, the ledge is consumed and thus generates a fresh edge behind it along the entire length of the ledge such that the cutting process may be maintained continuous until the entire length of the ledge is consumed. The cutting insert may then be indexed to the next ledge cutting edge.
Abstract: In a metallized capacitor roll with margin electrodes offset at each roll end, a resistor is placed axially in the roll so that one end contacts an electrode across a margin and the other end protrudes from the roll end to be contacted by the schooping metal at the roll end.