Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 8126117 | Multi-beam X-ray system A multi-beam x-ray system includes an x-ray source which emits x-rays and a housing with a first part and a second part. The second part is moveable relative to the first part and includes a plurality of optics of different performance characteristics. Each optic, t... | 02/28/2012 |
| 7835501 | X-ray tube, x-ray system, and method for generating x-rays According to an exemplary embodiment an x-ray tube comprises a cathode, rotable disc anode, and a focal spot modulating unit, wherein the cathode is adapted to emit an electron beam, and wherein the focal spot modulating unit is adapted to modulate the electron beam... | 11/16/2010 |
| 7363255 | Apparatus unit replacement assisting method and system By providing an apparatus unit replacement assisting method, in which, upon receipt of a request from a first user to replace a first unit comprising part of an apparatus with a second unit, the second unit is offered to the first user at a price after the deduction... | 04/22/2008 |
| 7343002 | Bearing assembly A bearing assembly suitable for use in conjunction with x-ray device having a rotating target anode and electron source disposed in an evacuated enclosure. The bearing assembly includes a shaft having a rotor hub to which the anode is mounted. The shaft cooperates w... | 03/11/2008 |
| 7280631 | Stationary computed tomography system and method Configurations for stationary imaging systems are provided. The configurations may include combinations of various types of distributed sources of X-ray radiation, which generally include addressable emitter elements which may be triggered for emission in desired se... | 10/09/2007 |
| 7233645 | Systems and methods for controlling an X-ray source A control system for an X-ray source includes a sensor interface for receiving one or more sensor signals representative of operation of the X-ray source; a programmable controller operative in response to the one or more sensor signals and a sequence of control ins... | 06/19/2007 |
| 7227923 | Method and system for CT imaging using a distributed X-ray source and interpolation based reconstruction A method for Computed Tomography (CT) imaging is provided. The method comprises rotating a gantry at a substantially slow rotation speed about a volume of interest. The gantry comprises a combination of X-ray source points. The X-ray source points comprise one or mo... | 06/05/2007 |
| 7209545 | X-ray source assembly having enhanced output stability, and fluid stream analysis applications thereof An x-ray source assembly (2700) and method of operation are provided having enhanced output stability. The assembly includes an anode (2125) having a source spot upon which electrons (2120) impinge and a control system (2715/2720) for con... | 04/24/2007 |
| 7187756 | X-ray CT apparatus and X-ray tube An X-ray CT apparatus capable of imaging a subject based on X-rays of multiple energy levels while using an ordinary X-ray detector includes an X-ray tube which generates X-rays from multiple focal points of different 3-dimensional positions sequentially on a time-d... | 03/06/2007 |
| 7175345 | Dental x-ray apparatus A dental x-ray apparatus (10) includes a tube head (11) formed from a cast zinc material. Structural components of tube head (11) include such component (20) formed from a plastic material impregnated with a high molecular weight substanc... | 02/13/2007 |
| 7150562 | High voltage cable terminal and clamp system A cable terminal and clamp system particularly suited for use in an x-ray tube environment. The cable terminal and clamp system includes a cable socket having cable and terminal ports, each of which defines an axis. The cable terminal and clamp system includes a cab... | 12/19/2006 |
| 7118275 | X-ray emission device and method of assembly An X-ray emission device and a method of assembly of the device having a casing with a window and an X-ray tube place in the casing. The tube comprises an anode assembly equipped with an anode, a cathode assembly equipped with a cathode and an envelope containing th... | 10/10/2006 |
| 7113568 | Liquid cooled bearing housing with greased lubricated rotating anode bearings for an x-ray tube A rotating anode bearing housing includes an x-ray tube frame (106) that has a vacuum chamber (108). An anode (110) resides within the vacuum chamber (108) and rotates on a shaft (114) via a bearing (117). The bearing (11... | 09/26/2006 |
| 7072439 | X-ray tube and method and apparatus for analyzing fluid streams using x-rays A technique for analyzing fluids by means of x-ray fluorescence applicable to any fluid, including liquids and gases, which emit x-ray fluorescence when exposed to x-rays. The apparatus includes an x-ray source (82) including an x-ray tube (64) having ... | 07/04/2006 |
| 7068749 | Stationary computed tomography system with compact x ray source assembly A stationary CT system comprising at least one annular x ray source assembly comprising a plurality of respective x ray sources spaced along the annular x ray source assembly. Each of the x ray sources comprises a respective stationary x ray target, an electron beam... | 06/27/2006 |
| 7035377 | X-ray generator and adjusting method of the same To solve a difference in an emitting directions by switching the types of X-rays. An X-ray generator comprises: an anticathode unit 3 in which a plurality of anticathode parts 2 (2A and 2B) that emit X-rays by collision of thermoelectrons... | 04/25/2006 |
| 7012989 | Multiple grooved x-ray generator An X-ray tube has a metal-ceramic envelope having rotatably mounted therein an anode disk, which may be axially translatable and provided with a peripheral rim surface wherein a focal track spiral groove (or multiple annular grooves) is disposed. The groove(s) inclu... | 03/14/2006 |
| 7001071 | Method and device for setting the focal spot position of an X-ray tube by regulation In a method and a device for setting the focal spot position of an X-ray tube the focal spot position is regulated as a controlled variable by a closed loop regulation circuit. A deflector deflects the electron beam of the X-ray tube depending on a deflection signal... | 02/21/2006 |
| 6945694 | Dental X-ray apparatus A dental x-ray apparatus (10) includes a tube head (11) formed from a cast zinc material. Structural components of tube head (11) include such component (20) formed from a plastic material impregnated with a high molecular weight substanc... | 09/20/2005 |
| 6275567 | Rotary-anode X-ray tube provided with a hydrodynamic sleeve bearing The invention relates to a rotary-anode X-ray tube which includes a sleeve bearing which is composed of an inner and an outer bearing segment, the outer bearing segment including intermediate pieces and a holder on which the intermediate pieces bear so as... | 08/14/2001 |
| 6164820 | X-ray examination system particulary for computed tomography and mammography X-ray examination installation, particularly for computed tomography for mammography, has a rotating bulb x-ray tube with a cathode-side drive as its x-ray source, with the tube being oriented so that its anode faces toward the exposure side or actuation ... | 12/26/2000 |
| 5581591 | Focal spot motion control for rotating housing and anode/stationary cathode X-ray tubes An x-ray tube includes an anode (A) and an envelope (C). A cathode assembly (B) which is supported in the envelope on a bearing (32) emits a beam of electrons which strike the anode forming a focal spot. The anode rotates (D) relative to the cathode such ... | 12/03/1996 |
| 5526396 | Electron tube with adjustable cathode structure An X-ray tube, comprising a cathode arrangement which includes an electron emitter connected to supporting pins which in turn are connected to the cathode structure via a respective fixing element. Particularly simple adjustment of the position of the fil... | 06/11/1996 |
| 5475729 | X-ray reference channel and x-ray control circuit for ring tube CT scanners A toroidal x-ray tube (I) is supported and selectively positioned by a gantry (II). The x-ray tube includes a toroidal housing (A) in which a rotor (30) is rotatably mounted. One or more cathodes (C) are mounted on the rotor for generating an electron bea... | 12/12/1995 |
| 5438605 | Ring tube x-ray source with active vacuum pumping A toroidal x-ray tube housing (A) is composed of multiple sections which are clamped together and sealed by elastomeric gaskets (128). An annular anode (B) is mounted to the housing with coolant passages (12, 14) extending thereadjacent. A rotor (30) is r... | 08/01/1995 |
| 5384820 | Journal bearing and radiation shield for rotating housing and anode/stationary cathode X-ray tubes A housing (A) which has a radiation transmissive window (52) defines a coolant oil reservoir (50). An x-ray tube (B) is mounted within the cooling oil reservoir. The x-ray tube includes a vacuum envelope having a cylindrical wall portion (10). A cylindric... | 01/24/1995 |
| 5291538 | X-ray tube with ferrite core filament transformer An evacuated envelope (C) which is connected with an anode (A), has a cathode assembly (B) rotatably mounted inside. Magnets (44, 46) hold the cathode assembly stationary as the anode and envelope rotate. A ferrite core transformer (60) includes a ferrite... | 03/01/1994 |
| 5274690 | Rotating housing and anode/stationary cathode x-ray tube with magnetic susceptor for holding the cathode stationary An x-ray tube includes an anode (A) and envelope (C) which are rotated (D) at a relatively high rate of speed. A cathode assembly (B) is supported in the envelope on a bearing (32). In order to hold the cathode assembly stationary, a magnetic susceptor (4... | 12/28/1993 |
| 5268955 | Ring tube x-ray source A toroidal x-ray tube housing (A) has an evacuated interior. An annular anode (B) is connected with the housing closely adjacent the window such that a cooling fluid passage (12) is defined in intimate thermal communication with the anode. A cathode assem... | 12/07/1993 |
| 5241577 | X-ray tube with bearing slip ring An anode (A) closes one end of an evacuated envelope (C) and a cathode end plate (22) closes the other. A cathode assembly (B) is mounted on a bearing (40) in the evacuated envelope such that the envelope and cathode can undergo relative rotation. A motor... | 08/31/1993 |
| 5200985 | X-ray tube with capacitively coupled filament drive A cathode assembly (B) including cathode filaments (52, 54) remain stationary in the interior of a rotating evacuated envelope (C). The cathode filaments generate a beam of electrons (12) which strike an annular anode surface (10) that rotates with the en... | 04/06/1993 |
| 5179583 | X-ray tube for CT apparatus An X-ray tube for a CT apparatus comprises a ring-shaped vacuum tube containing a fixed cathode having a thermion emitting surface, a ring-shaped fixed anode, and a ring-shaped rotatable cathode interposed between the fixed cathode and fixed anode. The ro... | 01/12/1993 |
| 4679219 | X-ray tube An X-ray tube is disclosed, which comprises an evacuated envelope having a cathode assembly and an anode assembly provided at the opposite ends of the envelope such that they face each other. The cathode assembly includes a spiral filament for generating ... | 07/07/1987 |
| 4675891 | X-ray apparatus with focus position control The invention relates to an X-ray apparatus with focus position control, the focus being formed on the anode of an X-ray tube with magnetic bearings. The X-ray apparatus comprises a focus position sensing device cooperating with electronic means associate... | 06/23/1987 |
| 4669102 | Method and device for operating and focusing tomographic X-ray equipment A method and a device for operating and focusing a tomographic x-ray unit using an electron beam and embodying at least one electron gun (1), an anode (2) at which the gun is aimed as well as the x-ray detectors (5) needed to produce a tomographic photogr... | 05/26/1987 |
| 4563769 | X-Ray generator device In an X-ray generator device a target member emitting X-rays by electron bombardment is arranged in a rod-shaped tubular probe and is provided with a conically tapering front part facing a comparatively narrow aperture in a controlling electron beam diaph... | 01/07/1986 |
| 4357555 | Rotary anode X-ray tube An X-ray tube having a rotary anode which is supported by a bearing system comprising an axial magnetic bearing and at least one radial sleeve bearing. In operation, mutually cooperating metal (e.g. W or Mo) supporting faces of the sleeve bearing are sepa... | 11/02/1982 |
| 4352196 | X-Ray tube for producing a flat wide-angle fan-shaped beam of X-rays A rotating-anode X-ray tube for producing a flat wide-angle fan-shaped beam with a substantially uniform distribution of energy comprises a cylindrical anode and a cathode axially or peripherally offset from the target area or focus bombarded by the elect... | 09/28/1982 |
| 4300051 | Traveling cathode X-ray source A scanning X-ray source with an evacuated cylindrical chamber which bounds a cavity that is configured to receive a patient undergoing diagnosis. A moving electron beam is generated from a cathode which is attached to a rotating drum that is mounted withi... | 11/10/1981 |
| 4159436 | Electron beam focussing for X-ray apparatus In X-ray apparatus having an electron beam gun producing a beam of electrons to be focussed on an X-ray producing target, in addition to a first focussing electrode on the gun structure, there is provided an auxiliary focussing means, comprising an electr... | 06/26/1979 |
