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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 8155272 | Methods and apparatus for e-beam scanning In one aspect, an x-ray scanning device is provided. The x-ray scanning device comprises a target adapted to convert electron-beam (e-beam) energy into x-ray energy, a detector array positioned to detect at least some x-rays emitted from the target, and a conveyer m... | 04/10/2012 |
| 8054944 | Electron beam controller of an x-ray radiator with two or more electron beams An x-ray tube has a number of emitters that generate respective electron beams, and has a common anode at which the electron beams strike on a surface to generate x-rays. A high x-ray dose power with a long lifespan are achieved while being able to quickly vary the ... | 11/08/2011 |
| 7809114 | Field emitter based electron source for multiple spot X-ray A multiple spot x-ray generator is provided that includes a plurality of electron generators. Each electron generator includes an emitter element to emit an electron beam, a meshed grid adjacent each emitter element to enhance an electric field at a surface of the e... | 10/05/2010 |
| 7529344 | Dual energy X-ray source A dual energy X-ray source for use in an explosive detection system includes only a single power supply and only a single X-ray tube. The X-ray tube includes only two electron guns and only a single anode. Each electron gun has its own grid and cathode. The X-ray so... | 05/05/2009 |
| 7428297 | Methods and apparatus for e-beam scanning In one aspect, an x-ray scanning device is provided. The x-ray scanning device comprises a target adapted to convert electron-beam (e-beam) energy into x-ray energy, a detector array positioned to detect at least some x-rays emitted from the target, and a conveyer m... | 09/23/2008 |
| 7327829 | Cathode assembly An improved cathode assembly, including a filament for producing an electron stream having a highly uniform cross sectional density. The cathode assembly comprises a support base, a cathode cup affixed to the support base, and a filament disposed in a slot defined o... | 02/05/2008 |
| 7315610 | X-ray device that emits an x-ray beam with a scanning-like movement In a method for operating an x-ray device, an x-ray beam is generated at a focal spot of a rotary anode that is rotatable around a rotation axis, and the x-ray beam is gated with a slit-shaped diaphragm to produce a fan-shaped x-ray beam, that is moved through an ex... | 01/01/2008 |
| 7286645 | X-ray device that emits an x-ray beam with a scanning-like movement An x-ray device includes an x-ray tube for generation of an x-ray emanating from a focal spot of a rotary anode rotatable around a rotation axis and a slit-shaped diaphragm for generation of a fan-shaped x-ray beam that is gated from the x-ray and emission is moved ... | 10/23/2007 |
| 7248672 | Multiple-position x-ray tube for diffractometer An x-ray source provides both a line focus output and a point focus output, and is mounted on a rotatable support to allow easy changing between the two. A housing has ports at different angular positions relative to an anode, and each port has an associated optic a... | 07/24/2007 |
| 7187748 | Multidetector CT imaging method and apparatus with reducing radiation scattering A method for scanning an object to reduce image degradation includes scanning the object in a helical mode using a multi-slice CT imaging system having a plurality of detector arrays arranged along a z-axis direction and a radiation source having a beam focal spot. ... | 03/06/2007 |
| 7184514 | X-ray CT apparatus An X-ray tube comprises a cathode configured to emit a heat electron, a target, including a plurality of areas where target angles are different in a rotation direction, which the heat electron collides with, and a rotation mechanism configured to rotate the target ... | 02/27/2007 |
| 7120222 | CT imaging system with multiple peak x-ray source An x-ray source (32) for performing energy discrimination within an imaging system (10) includes a cathode-emitting device (82) emitting electrons and an anode (81) that has a target (80) whereupon the electrons impinge to generate... | 10/10/2006 |
| 7085354 | X-ray tube apparatus This invention provides an X-ray tube apparatus which can output X-rays of a dose suitable for radioscopy for a long time. In the apparatus, small focus filaments are provided on respective sides of a large focus filament, such that they have almost equal distances ... | 08/01/2006 |
| 7065179 | Multiple target anode assembly and system of operation An anode assembly having multiple target electrodes is disclosed. Each target electrode produces an x-ray fan beam for radiographic data acquisition. The target electrodes are designed to sequentially generate an x-ray fan beam and therefore operate at a proportiona... | 06/20/2006 |
| 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 |
| 7023960 | Method of adjusting the emission rate of radiation from a source of radiation To adjust the emission rate of radiation from an X-ray tube, the value of the current of the X-ray tube is modeled empirically by a second-order polynomial function depending on the heating current and a first-order polynomial function depending on the high voltage.... | 04/04/2006 |
| 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 |
| 6980627 | Devices and methods for producing multiple x-ray beams from multiple locations An x-ray generating device includes at least one field-emission cold cathode having a substrate and incorporating nanostructure-containing material including carbon nanotubes. The device further includes at least one anode target. Associated methods are also describ... | 12/27/2005 |
| 6975703 | Notched transmission target for a multiple focal spot X-ray source A flat panel x-ray tube assembly is provided comprising a cathode assembly including a plurality of emitter elements. An anode substrate is included having a substrate upper surface facing the plurality of emitter elements and a substrate lower surface. The substrat... | 12/13/2005 |
| 6947522 | Rotating notched transmission x-ray for multiple focal spots An x-ray source with an x-ray source target are provided. The x-ray source includes an electron source. The x-ray source also includes an x-ray transmission window. The x-ray source also includes an x-ray source target located between the electron source and the win... | 09/20/2005 |
| 6922455 | Gas-target neutron generation and applications Described herein are integrated systems for generating neutrons to perform a variety of tasks including: on-line analysis of bulk material and industrial process control (as shown in FIG. 1), security interrogation (as shown in FIG. 2), soil and enviro... | 07/26/2005 |
| 6807248 | Multisource type X-ray CT apparatus A multisource type X-ray CT apparatus including a fixed sensor array, a fixed vacuum chamber, and an X-ray generation unit. The X-ray generation unit includes a cathode and an anode which are fixed in the vacuum chamber so as to surround the sensor array, a gate arr... | 10/19/2004 |
| 6738453 | Hot cathode of X-ray tube In a hot cathode of an X-ray tube of the kind having a thermoelectronic emitter supported by a heating element, the emitter is comprised of plural emitter regions separated from each other. Each emitter region has the largest measure less than 3 mm, so that no crack... | 05/18/2004 |
| 6727658 | Electron beam generating apparatus and electron beam exposure apparatus An electron beam generating apparatus for generating a plurality of electron beams, which includes: a plurality of cathodes for generating thermoelectrons; a cathode power supply unit for applying negative voltage to the cathodes so as to emit the thermoelectrons fr... | 04/27/2004 |
| 6728335 | Controller for array of miniature radiation sources A controller is provided for selectively and independently control each of a plurality of therapeutic radiation sources arranged along an array. The controller is operable to selectively generate therapeutic radiation at selected time intervals and at selected inten... | 04/27/2004 |
| 6556651 | Array of miniature radiation sources A system for delivering therapeutic radiation, such as x-rays, to a treatment region includes a plurality of individually controllable therapeutic radiation sources. The therapeutic radiation sources are selectively and moveably disposed along one or more... | 04/29/2003 |
| 6546078 | Rotary anode type X-ray tube An X-ray tube includes a substantially cylindrical rotor having an anode target fixed thereto, a substantially columnar stationary shaft coaxially arranged inside the rotor with a bearing gap, a dynamic slide bearing having helical grooves and formed betw... | 04/08/2003 |
| 6333969 | X-ray tube An X-ray tube comprising an anode having a target surface radiating X-rays from a position of an X-ray focal spot by impingement of an electron beam, a focusing electrode and cathodes. The focusing electrode has a bottom portion positioned facing the targ... | 12/25/2001 |
| 6125167 | Rotating anode x-ray tube with multiple simultaneously emitting focal spots An x-ray tube (10) includes a body (16) defining a vacuum envelope. A plurality of anode elements (18) each defining a target face are rotatably disposed within the vacuum envelope. Mounted within the vacuum envelope, a plurality of cathode assemblies (22... | 09/26/2000 |
| 5901197 | Method of extending the life of a multiple filament x-ray tube Methods for extending the life of an X-ray tube having at least two filaments which are individually energizable in which the filaments are successively energized either for a predetermined number of exposures or based on a predetermined passage of time, ... | 05/04/1999 |
| 5631944 | Rotary cathode X-ray tube equipment The rotary cathode X-ray tube equipment of present invention is constructed so as to permit radiation of X-ray from all directions with respect to the whole circumference of a subject, and is used for x-ray CT. The equipment of the invention is constructe... | 05/20/1997 |
| 5592526 | Rotary cathode x-ray tube equipment The rotary cathode X-ray tube equipment of the present invention is constructed so as to permit radiation of X-ray from all directions with respect to the whole circumference of a subject, and is used for x-ray CT. The equipment of the invention is constr... | 01/07/1997 |
| 5548629 | Rotary cathode x-ray tube equipment The rotary cathode X-ray tube equipment of the present invention is constructed so as to permit radiation of X-ray from all directions with respect to the whole circumference of a subject, and is used for x-ray CT. The equipment of the invention is constr... | 08/20/1996 |
| 5511105 | X-ray tube with multiple differently sized focal spots and method for operating same An x-ray tube has an anode whose target area is divided into regions formed of different materials, whereby focal spots of different size can be optionally generated in each of the regions. The focal spots belonging to one region are respectively generate... | 04/23/1996 |
| 5481585 | Rotary cathode x-ray tube equipment The rotary cathode X-ray tube equipment of the present invention is constructed so as to permit radiation of X-ray from all directions with respect to the whole circumference of a subject, and is used for x-ray CT. The equipment of the invention is constr... | 01/02/1996 |
| 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 |
| 5335255 | X-ray scanner with a source emitting plurality of fan beams A slow scanning CT Scanner providing slice data simultaneously for a plurality of slices so as to avoid blurring between adjacent slices due to patient movement.... | 08/02/1994 |
| 5305363 | Computerized tomographic scanner having a toroidal x-ray tube with a stationary annular anode and a rotating cathode assembly A toroidal x-ray tube (I) is supported (II) for rotation about a horizontal axis (170), translation along a vertical axis (172), and translation along a horizontal axis (174). The x-ray tube includes a toroidal housing (A), an annular anode (B), and a cat... | 04/19/1994 |
| 5303281 | Mammography method and improved mammography X-ray tube 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.... | 04/12/1994 |
| 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 |
