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7224768 |
X-ray apparatus with anode rotation number detecting means
An X-ray tube apparatus ( 2 ) having an anode rotating mechanism for preventing damage of the anode ( 23 ) of the X-ray tube apparatus thereby to shorten the X-ray exposure waiting time. When the...
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6480569 |
X-ray control apparatus and X-ray diagnostic apparatus
In an X-ray diagnostic apparatus, the rotation anode of an X-ray tube is placed in rotation at a given low speed prior to examination of an object under examination by fluoroscopy. For fluoroscopy,...
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5566219 |
X-ray apparatus comprising of a circuit arrangement for accelerating and decelerating the rotary anobe of a rotary-anode x-ray tube
The invention relates to an X-ray apparatus, comprising a circuit arrangement for accelerating and decelerating the rotary anode of a rotary-anode X-ray tube in which phase-shifted alternating...
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5490198 |
Device for driving a rotary anode
The invention relates to a device for driving the rotary anode of an X-ray tube, which device comprises a drive motor (5) having a stator (5a) and a rotor (5b), which are operated at anode...
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5340122 |
Differentially-pumped ferrofluidic seal
A ferrofluidic seal arrangement for sealing a high-speed rotary shaft which passes between an environment at atmospheric or high pressure and an environment at high-vacuum is provided, which is...
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5339348 |
X-ray tube rotor controller using the main high voltage inverters for acceleration
An x-ray tube rotor controller uses the main high voltage inverters for acceleration. The rotor controller includes a DC voltage source, and a rotary anode drive circuit including a rotary anode...
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5260983 |
X-ray tube apparatus
An X-ray apparatus is provided with an operation process in which an AC voltage is applied from a power source to a magnetic stator coil so that the components of bearings are heated by magnetic...
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5212437 |
High speed starter operations monitor
An x-ray tube (10) of a CT scanner has a rotating anode and rotor combination which is propelled by AC currents applied to run and phase windings (42, 46) by a starter (22). A monitor (24) includes...
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5206894 |
X-ray system accessory
An electromagnetic remote control exposure system including a receiver and transmitter for excitation of a mobile X-ray unit having a rotating anode X-ray tube and exposure mechanism. The...
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5159697 |
X-ray tube transient noise suppression system
An X-ray imaging apparatus has a vacuum tube with an envelope that contains an anode, a cathode and a filament. A motor has a rotor mechanically connected to the anode inside the envelope and a...
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5105141 |
Device to control the speed of two-phase or three-phase motors
Disclosed are a device and a method to control the speed of two-phase or three-phase A.C. motors by means of a three-phase converter. The switching-over instants of the switches of the converter...
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5090041 |
X-ray tube anode speed reducer
A rotor speed adjustment circuit (60) reduces the rotational speed of an anode (32) of an x-ray tube (14) in a diagnostic apparatus (10). An AC current (64) from an AC current source (54) is...
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5060251 |
X-ray diagnostics generator having a rotating anode x-ray tube
An x-ray diagnostics generator which includes a rotating anode x-ray tube includes circuitry for setting the speed of rotation of the anode dependent on exposure parameters. At particular...
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5060252 |
Generator for operating a rotating anode X-ray tube
A power generator drives a rotating anode of an X-ray tube via a stator-rotor in which the stator receives the anode side high voltage potential. An isolating transformer is connected to an...
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4829551 |
Biphase quadrature drive for an x-ray tube rotor
An x-ray tube (10) imaging system, such as a computed tomography scanner, includes a cathode (40) for generating a stream of electrons. A rotating anode (42) is placed in a path of the electron...
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4780900 |
Radiogenic tube radiological device with magnetic bearings
A radiological device is provided of the type comprising a radiogenic tube with magnetic bearings, said radiogenic tube being contained in a sheath as well as electronic means for controlling said...
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4760588 |
Control system for starter for X-ray tubes
A boost circuit for providing rapid acceleration of anode rotating motors for X-Ray tubes features provision for supplying to the motor for a limited period of time a relatively high power AC...
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4426720 |
Drive for rotary anodes of X-ray tubes
In an exemplary embodiment, to reduce wear on the bearings of a rotary anode during radiography processes which require a high load of the tube, such as e.g. all types of series techniques, a...
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4377002 |
X-Ray diagnostic generator comprising an inverter circuit feeding the high voltage transformer
In an exemplary embodiment a rotary anode motor is likewise supplied by the inverter circuit which is in the form of a full bridge with two pairs of alternately closable electronic switches. In one...
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4376894 |
Device for driving a rotary-anode X-ray tube
The invention relates to a drive system for a rotary-anode X-ray tube which comprises an asynchronous motor. The current through the stator windings is generated by two pulse-width modulators to...
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4363971 |
Method of and apparatus for controlling the electric power applied to a rotary-anode X-ray tube
The temperature of the anode disc of a rotary-anode X-ray tube is continuously determined by means of the method apparatus in accordance with the invention. When the temperature exceeds a first...
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4360734 |
Method and apparatus for the operation of rotary anode X-ray tubes
In an exemplary embodiment, a portion of the tube vacuum envelope is disposed between the rotor and stator of the anode drive motor. Taking into account the required high voltage safety, hitherto...
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4260885 |
Selectable wavelength X-ray source, spectrometer and assay method
A method and apparatus for producing X-rays having any selected one of a plurality of specific different wavelength spectra greatly facilitates X-ray fluorescence analysis of samples to detect...
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4247776 |
X-ray diagnostic generator with an inverter feeding the high voltage transformer
The output voltage of the inverter is supplied to a high voltage transformer to which an X-ray tube with a rotating anode is connected. The rotating anode motor is likewise fed by the inverter. To...
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4200796 |
Storage cell type X-ray apparatus
A storage cell type X-ray apparatus uses a storage cell as its power source and operates so that the dc voltage of the power source is converted to an ac voltage, this ac voltage is elevated to a...
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4158138 |
Microprocessor controlled X-ray generator
A diagnostic X-ray system operative in response to control signals from a stored program digital computer to generate an X-ray beam and to produce an image of the object through which the X-ray...
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4107535 |
X-ray apparatus utilizing rotary anode type X-ray tubes
In X-ray apparatus utilizing a rotary anode type X-ray tube in which a rotary anode provided with a target is rotated by a rotor driven by a stator on the outside of the tube, the stator windings...
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4065673 |
Rotor controller systems for X-ray tubes
A system for controlling the operation of the starter for X-ray tubes and more specifically the acceleration and operation of the rotating anodes of the X-ray tubes in accordance with any one of...
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4035648 |
X-ray tube protection circuit
An eight bit binary address signal is generated in response to a selected time station, X-ray tube, focal spot and anode rotation speed which is then used to address a read only memory (ROM)...
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3991315 |
X-ray generator
A generator circuit for a rotary anode x-ray tube in which the anode (rotor) and the stator are maintained at the same D.C. level thereby permitting a smaller air gap between the rotor (anode) and...
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3983397 |
Selectable wavelength X-ray source
A method and apparatus for producing X-rays having any selected one of a plurality of specific different wavelength spectra greatly facilitates X-ray fluorescence analysis of samples to detect...
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3968413 |
Variable speed starter for X-ray tubes
A solid state starter to selectively accelerate X-ray tube rotors to the low speed utilized for fluoroscopic examinations and up to the high speed required for spot-film or radiographic exposure...
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3955119 |
Apparatus for predicting incipient failure of an X-ray generator tube
Failure inducive operating conditions of an X-ray generator tube are sensed. Some of the sensed operating conditions are events such as hot overload of the target and thermal shock of the target,...
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3942015 |
Rotating-anode x-ray tube
A rotating anode for an X-ray tube is constructed with a broad rim on to which the radiation - exciting electron beam is focused from a direction perpendicular to the axis of rotation. In order to...
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3925660 |
Selectable wavelength X-ray source, spectrometer and assay method
A method and apparatus for producing X-rays having any selected one of a plurality of specific different wavelength spectra greatly facilitates X-ray fluorescence analysis of samples to detect...
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3878395 |
METHOD AND MEANS FOR OPERATING X-RAY TUBES WITH ROTARY ANODES
In X-ray tubes anodes are used which, are maintained in rotation during the production of X-rays for fluoroscopy and which anodes are supported by friction-diminishing members. The anodes are...
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3836805 |
ROTATING ANODE X-RAY TUBE
A rotating anode x-ray tube employing a generally cylindrical anode which is axially moveable relative to the cathode so that the focal spot traverses a spiral path as the anode rotates and moves...
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3832553 |
CIRCUIT FOR A ROTARY ANODE X-RAY TUBE
A circuit is used for actuating the driving motor of a rotary anode of an X-ray tube. The driving motor is an a.c. asynchronous motor fed from a converter. The converter is provided with actuating...
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3335280 |
Two speed rotary anode x-ray tube driven by a two-phase induction motor
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3205360 |
Load sensitive rotating anode x-ray tube speed selector
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3062960 |
Protective device for rotating anode tubes
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3043957 |
Protection device for rotating anode x-ray tube
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2958782 |
Electronic timer
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