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5412280 |
Electrodeless lamp with external conductive coating
Disclosed is an electrodeless, low pressure gas discharge lamp. The lamp includes a vitreous envelope containing a metal vapor and an inert gas. The envelope is shaped with an external chamber for...
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5406167 |
Apparatus for shielding unnecessary electromagnetic waves in a magnetron for a microwave oven
This invention relates to an unnecessary electromagnetic wave shielding structure of a magnetron for a microwave oven, comprising an electric wave absorbent filament ceramic disposed adjacent the...
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5404084 |
Method of and apparatus for canceling electric field
An electric field cancellation apparatus that can reduce electric field radiation from a cathode ray tube inexpensively includes a canceling pulse generating circuit generating a pulse voltage that...
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5404121 |
Deflection yoke with a triangular magnetic-field leakage canceling coil
A deflection yoke is mounted with a leaked magnetic-field canceling coil installed on a screen portion for attenuating externally emitted leakage magnetic field, using a horizontal deflection coil....
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5399939 |
Magnetic shield with cathode ray tube standoff for a computer monitor
A shield for a computer monitor comprises a hollow cylindrical magnetic sleeve disposed around at least a portion of the yoke windings of the monitor. The sleeve has a diameter greater than the...
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5396151 |
Circuit for reducing ELF electric fields radiated from CRT devices
A circuit for reducing extremely low frequency (ELF) electric fields on cathode ray robe (CRT) devices comprises a power supply means, a CRT, a voltage sensing means, an amplification means, and a...
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5382868 |
Cathode-ray tube having degaussing coils with flat portions on an implosion-resistant band
A cathode-ray tube has a tube body with an implosion-resistant band disposed on the side walls of the tube body. Two degaussing coils are mounted on the implosion-resistant band on opposite walls...
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5367221 |
Magnetic immunity system (MIS) and monitor incorporating the MIS
An automatic axial field compensation and quick-degauss control system is disclosed. Further, a CRT type monitor incorporating such an automatic compensation and quick-degauss control circuit, and...
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5363022 |
Horizontal deflection circuit with reduced VLF electric fields from CRT displays
A horizontal deflection circuit for a CRT supplies an exciting current in such a way that flyback voltages including both a positive voltage and a negative voltage as components are generated in...
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5350973 |
Cathode-ray tube apparatus having a reduced leak of magnetic fluxes
In a cathode-ray tube apparatus, a deflection yoke is provided on a funnel of a tube and a pair of closed loop coils are provided on a panel and the funnel of the tube at upper and lower sides,...
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5331254 |
Starting circuit for an electrodeless high intensity discharge lamp employing a visible light radiator
A starting circuit for an electrodeless HID lamp includes a visible light radiator for illuminating a gas probe starter during lamp starting. In one embodiment, a light emitting diode (LED)...
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5327043 |
Internal magnetic shield-frame mounting means
A cathode-ray tube has a faceplate panel joined to a funnel. An internal magnetic shield is disposed within the tube and is connected to a bottom surface of a flange of a shadow mask frame. The...
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5325018 |
Electrodeless fluorescent lamp shield for reduction of electromagnetic interference and dielectric losses
An electrodeless fluorescent lamp of the type having a solenoidal drive coil wound about a ferrite core includes an inner shield between the coil and the core and further includes an outer shield...
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5294994 |
Integrated computer assembly
An computer assembly having an integral video display and processor subsystem in a single enclosure is described. The assembly contains an electrically conductive safety wall inside the enclosure...
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5285132 |
Display device
A display device is described, comprising a display tube and a deflection unit. The high DC voltage (EHT) is generated by a line output transformer, this transformer receiving the flyback pulse...
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5260626 |
Apparatus for suppressing field radiation from display device
In order to eliminate any harmful influence due to electric field radiation on the human body, electric field radiation from a front surface of a cathode ray tube is reduced. A degaussing coil...
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5243262 |
Method and apparatus for compensating alternating electrical fields present at the front surface of a cathode picture tube
A method and apparatus for compensating the alternating electrical fields present at the front surface of a cathode ray picture tube wherein the high-voltage signal supplied to the high-voltage...
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5239238 |
Electrodeless low-pressure mercury vapour discharge lamp
An electrodeless low-pressure mercury vapor discharge lamp whose discharge vessel is provided with a core of magnetic material and a coil surrounding the core which coil connected to a...
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5235243 |
External magnetic shield for CRT
A cathode ray tube has an external magnetic shield adapted for tight fitting positioning upon and about the funnel portion of the CRT. The external magnetic shield includes a shell preferably of...
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5231332 |
AC electric field emission suppression in CRT image displays
An AC electric field emission suppressor for use in a CRT imaging system cancels the ripple voltage on the ultor voltage that generates the undesired emission. Ripple-cancelling pulses are derived...
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5229689 |
Electrostatic shield for nearfield alternating electrical field emission reduction in a CRT display
An electrostatic shield and method for shielding an electric field are presented, having particular application to the reduction of electric field emissions from a CRT display. The electrostatic...
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5218270 |
Method and a coupling for decreasing the detrimental radiation caused by a cathode-ray tube
The object of the disclosure is a method and a coupling for decreasing the alternating current field produced by a cathode-ray tube in the environment. The said field or radiation is at least...
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5208510 |
CRT magnetic field cancelling device
A stray magnetic field cancelling device for a cathode ray tube comprises an elongated member of adjustable length composed of at least two magnetizable metal plates in slidable relationship...
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5198729 |
CRT monitor with elimination of unwanted time variable electric field
Unwanted electric fields in the area in front of a CRT can be produced by flyback voltage pulses which occur across the horizontal deflection coils and are coupled to the inner DAG coating of the...
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5192893 |
Electromagnetic radiation shield for a video amplifier
The disclosed invention relates to a video display system having a device for shielding electromagnetic radiation emitted from electrical wires which connect a video amplifier to a cathode ray...
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5184045 |
Magnetron for a microwave oven having a pair of choke coils wound around a core in the same directions
A magnetron for a microwave includes a pair of choke coils wound around only one core in same direction thereby forming a unique type choke coil. Ends of the unique type choke coil are connected...
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5180947 |
Shielded cathode ray tube
A shielded CRT (18) display includes a secondary shielding enclosure (14) for enclosing the CRT (18) and for inhibiting electromagnetic emissions therefrom. A primary shielded enclosure (12)...
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5179315 |
Circuit for the compensation of the horizontal component of the earth's magnetic field for a color picture tube of a high-resolution monitor
The circuit includes a probe (6) for detecting a horizontal magnetic field and a first and a second circuit means (15, 17) driven by said probe (6) so as to create respective axial and lateral...
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5170094 |
Magnetic field compensation apparatus
A compensating coil for a scanning electron beam display such as a color television tube reduces undesirable deflection of the electron beams due to ambient magnetic fields, in particular the...
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5168195 |
Magnetic field compensation apparatus
A compensating coil for a scanning electron beam display, such as a color television tube, reduces undesirable deflection of the electron beams due to ambient magnetic fields, in particular the...
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5157308 |
Methods and apparatus for reducing electromagnetic interference emission from a cathode ray tube video display system
Video signals for each primary color are delayed in time relative to every other primary color video signals. When displayed on a cathode ray tube ("CRT") display, the time delayed video signals...
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5151635 |
Apparatus and method for reducing the magnitude of time varying electric fields in CRT displays
An electric field cancellation system and method for reducing electric fields are presented, especially suited for use in reducing the magnitude of electric field emissions from a CRT display....
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5148083 |
Demagnetizer
A demagnetizer for generating a degauss magnetic field to a cathode-ray tube by supplying an output of an AC power source to a degauss coil via a thermistor of positive characteristic, wherein a...
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5124614 |
Display tube having discrete X-ray absorbing means and methods of manufacture
A method of manufacturing a display tube comprising an envelope having an envelope portion and a display window. The quantity of X-rays released from the envelope portion is determined, after which...
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5124895 |
Electric discharge lamp arrangement and headlamp for motor vehicle using same
A headlamp for a motor vehicle comprises a power unit including an inverter, a starting circuit connected to the inverter, an electric discharge lamp bulb connected to the starting circuit, and a...
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5107179 |
Method and apparatus for magnetic field suppression using inductive resonant and non-resonant passive loops
The present invention provides an apparatus and methods to reduce the stray magnetic fields created by the yoke assembly of a cathode ray tube (CRT) visual display device, and emitted from the CRT...
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5101139 |
Reducing video display radiation
A video display has a flat panel display, and to reduce electric field radiation, includes a conducting shield having a transparent conducting surface overlying the display. The terminal is also...
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5095252 |
System for remote visual inspection employing a stroboscopic light source
A system employing a stroboscopic light source permits an operator to remotely inspect and analyze high speed repetitive motion of machines. The system enables an operator to freeze motion or...
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5045751 |
Cathode ray tube of improved breakdown voltage characteristic
A cathode ray tube has an insulating layer formed at at least a part of the outer surface of a neck tube. The insulating layer is a layer obtained by coating and baking a sol prepared by dispersing...
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5032764 |
Coil, a method of construction of said coil and an imaging device equipped with a coil of this type
In order to compensate for the influence of magnetic fields on charged-particle beams, in particular in imaging devices provision is made for a coil constituted by a support plate of substantially...
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5021702 |
Electron beam apparatus including a plurality of ion pump blocks
An electron beam apparatus has a cylindrical chamber, ion pump exhaust zones arranged in a substantially ring-like array, and an electron gun located on the center axis of the ring-like array,...
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5015915 |
Method of compensating for the earth's magnetic field in a picture tube
An arrangement for compensating against the magnetic field of the earth in a picture tube in remote-controlled video-display equipment, in which a compensating voltage is generated by a...
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5006763 |
Luminaire for an electrodeless high intensity discharge lamp with electromagnetic interference shielding
A luminaire for an electrodeless high intensity discharge (HID) lamp includes passive and/or active electromagnetic interference (EMI) shielding apparatus. One embodiment of passive EMI shielding...
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H000909 |
Method of correcting eddy current magnetic fields in particle accelerator vacuum chambers
A method for correcting magnetic field aberrations produced by eddy currents induced in a particle accelerator vacuum chamber housing is provided wherein correction windings are attached to...
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4999542 |
Data processing display terminal
A data processing display terminal utilizing a cathode ray tube (CRT) display is provided in which information-bearing electro-magnetic radiations are suppressed at the neck of the cathode ray tube...
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4996461 |
Closed loop bucking field system
A system for improving the operation of a cathode ray tube (CRT) is disclosed whereby interference caused by external magnetic fields is mitigated. The system comprises a CRT having a CRT magnetic...
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4975618 |
Deflection device for a color picture tube apparatus
In a color picture tube apparatus, a deflection unit is provided around a color picture tube and a leakage magnetic is generated from the deflection unit. A metal cover made of aluminum, which...
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4963792 |
Self contained gas discharge device
A gas discharge apparatus includes a discharge chamber including a transparent dome portion and an electrode-including base portion, which together enclose an ionizable gas. A cup-shaped base...
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4950955 |
Magnetic field compensator for a CRT
In a television receiver, a magnetic field compensator of a horizontal component of the earth's magnetic field includes a fluxgate magnetometer having a pair of sensing windings for generating...
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4947083 |
Picture display device with interference suppression means
A picture display device having a display tube and a deflection unit comprising a field deflection coil and a line deflection coil is disclosed. To comply with a predetermined interference...
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