Famous Patents
British merchant Peter Durand invented the tin can in 1810.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8106575 | Electron beam apparatus having a recess formed in a surface of an insulating member An electron emission device in an electron beam apparatus includes an insulating member having a recess on a surface thereof, a gate, and a cathode opposed to the gate via the recess. The recess has a depression formed in a surface of the recess. ... | 01/31/2012 |
| 7986080 | Electron-emitting device An electron-emitting device and a fabricating method thereof are provided. First, a substrate, having a first side and a second side which is opposite to the first side, is provided. Afterwards, a first electrode pattern layer is formed on the first side of the subs... | 07/26/2011 |
| 7969082 | Electron beam apparatus It aims to improve electron emission efficiency in an electron beam apparatus which includes laminated electron-emitting devices. To achieve this, there are provided an insulating member which has a concave portion on its surface, a cathode which is positioned astri... | 06/28/2011 |
| 7294955 | Electrode for electron gun and electron gun using same An electrode for an electron gun and an electron gun using same are provided which make use of stable carbon material having small work function and which permit orientation control to be achieved and which can be manufactured at a low cost. An electrode for an elec... | 11/13/2007 |
| 7038367 | Electron gun for cathode ray tube including electrodes with different dimensions An electron gun for a cathode ray tube includes a triode portion including cathodes, a first electrode, and a second electrode arranged with predetermined gaps therebetween. A plurality of electrodes arranged in sequence starting from a position adjacent to the seco... | 05/02/2006 |
| 6971766 | Redundant aperture lamp system An aperture lamp system that facilitates improved reliability and performance in a display system is provided. The aperture lamp system provides improved reliability by providing a second lamp coupled to a first lamp through a coupling aperture. When the first lamp ... | 12/06/2005 |
| 6952466 | Oil-free electron source for an EBT scanner An oil-free electron source including a vacuum chamber within which a vacuum is maintained. A rigid insulated receptacle and an anode extend into the vacuum chamber and are mounted to opposite ends of the housing. A cathode-focus electrode assembly is mounted to an ... | 10/04/2005 |
| 6891321 | Oil-free electron source having cathode and anode members adjustable with five degrees of freedom An electron source includes a vacuum chamber within which a vacuum is maintained by a vacuum pump. An insulated receptacle is mounted within the vacuum chamber and has a receptacle mounting flange. The receptacle mounting flange is used to establish a coordinate sys... | 05/10/2005 |
| 6841924 | Low-voltage high-resolution einzel gun A low voltage Einzel gun design maximizes the size of the second main lens to reduce spherical aberrations thereby reducing spot-size and improving focus quality. The gun's final accelerator electrode is formed as an internal conductive coating on the neck, which is... | 01/11/2005 |
| 6815913 | Cathode ray tube The present invention provides a cathode ray tube which exhibits a favorable contrast by enhancing a speed modulation effect. A front-stage anode electrode and a focus electrode which constitute an electron gun are respectively divided into a plurality of portions. ... | 11/09/2004 |
| 6781300 | Laser based electron beam gun This invention relates to electron guns, each comprising of an indirectly heated cathode, a gate electrode and an anode, for generating electron beams of various shapes and power that are preferably used to machine workpieces. Thus cathodes can be used with various ... | 08/24/2004 |
| 6774552 | Electron gun An electron gun also has a cathode for emitting electrons, a heater cap which contains a heater for applying the cathode with thermal energy for emitting electrons, a retainer for securing the cathode on the heater cap by clamping the peripheral edge of the cathode ... | 08/10/2004 |
| 6741020 | Cathode ray, tube including an electron gun having specific relation of axial length of focus electrode and focus electrode-screen distance A cathode ray tube has an anode and a focus electrode. The large-diameter cylinder portion of the focus electrode is disposed concentrically within a large-diameter cylinder portion of the anode. The anode and a first electrode facing a cathode side end of the focus... | 05/25/2004 |
| 6720726 | Color cathode ray tube In an electron gun assembly, its main convergence lens is composed of a focus electrode to which a focus voltage is applied, an anode electrode to which a high anode voltage is applied, and an intermediate electrode which is provided between the focus and anode elec... | 04/13/2004 |
| 6710532 | Electron gun in color CRT An electron gun is provided for a CRT. The electrode gun includes three cathodes for emitting electron beams, a plurality of acceleration electrodes, and a focus electrode and an anode. The focus electrode and the anode each include an opposite rim having a single e... | 03/23/2004 |
| 6507143 | Cathode ray tube including an electron gun having specific relation between axial length of focus electrode and lens-screen distance A cathode ray tube has an anode of a large-diameter cylinder portion on its phosphor screen side and a small-diameter cylinder portion on its cathode side connected together, and a focus electrode formed of a large-diameter cylinder portion of a diameter ... | 01/14/2003 |
| 6504296 | Tube neck for cathode ray tube In order to improve the definition and the breakdown behavior in a tube neck (16) that includes an anode cylinder (20) and a focusing cylinder (19), the tube neck (16) is made of a non-conductive material, particularly a ceramic. The inner surface of the ... | 01/07/2003 |
| 6495953 | Cold cathode electron gun To stabilize an emission current of cold cathode electron gun and extend its product life. A cold cathode electron gun comprises a cold cathode for emitting electrons by field-emission, a gate electrode for controlling the field-emission, a Wehnelt electr... | 12/17/2002 |
| 6445116 | Color cathode ray tube having an improved electron gun A color cathode ray tube includes a three-color phosphor screen, a shadow mask spaced from the phosphor screen and a three-beam type electron gun. The main lens section includes a focus electrode and an anode facing the focus electrode, each of the focus ... | 09/03/2002 |
| 6111350 | Color cathode ray tube having an improved electron gun A color cathode ray tube includes a three-beam in-line type electron gun. The main lens section includes a focus electrode and an anode facing the focus electrode, each of the focus electrode and the anode has an electrode having a single opening common f... | 08/29/2000 |
| 6081068 | Color cathode ray tube having improved main lens electrodes A color cathode ray tube includes a phosphor screen, a shadow mask closely spaced from the phosphor screen and an electron gun. The electron gun includes three cathodes for emitting three in-line electron beams and a plurality of electrodes each having el... | 06/27/2000 |
| 5894190 | Color cathode ray tube having a large-diameter lens A cathode ray tube is provided with an electron gun having an electron lens including a large-diameter cylinder electrode and a small-diameter cylinder electrode composed of a large-diameter cylinder portion and a small-diameter cylinder portion, and at l... | 04/13/1999 |
| 5572084 | Color cathode ray tube A color cathode ray tube equipped with an in-line electron gun includes a main lens made up of two cylindrical electrodes arranged in a spaced relationship. Each of the electrodes has an opening and having therein a plate electrode with a beam passing are... | 11/05/1996 |
| 5461282 | Advanced center post electron gun An advanced center post (ACP) gun is provided which is capable of producing either a large orbit or small orbit electron beam. The gun comprises an annular shaped cathode, a control electrode adjacent the cathode, and an annular anode having an opening th... | 10/24/1995 |
| 5448134 | Cathode ray tube having improved structure for controlling image quality A cathode ray tube having an electron gun for relatively low beam currents (less than 1 mA) is shown. The electron gun has a G1 and a G2 electrode. The voltage difference between these electrodes is more than 800 Volt and the electrical field strength E | 09/05/1995 |
| 5384512 | Electron gun for cathode-ray tube In an electron gun for a cathode-ray tube according to this invention, a quadrupole lens having a small spherical aberration and an asymmetrical lens are combined to properly focus an electron beam, thereby greatly reducing the size of a beam spot formed ... | 01/24/1995 |
| 5327044 | Electron beam deflection lens for CRT An electron gun for a cathode ray tube (CRT) includes a cathode, a low voltage beam forming region (BFR), and a high voltage deflection focus lens disposed in the beam deflection region of the CRT's yoke for simultaneous focusing and deflection of the ele... | 07/05/1994 |
| 5223764 | Electron gun with low voltage limiting aperture main lens A limiting aperture disposed in a relatively low voltage and electrostatic field-free region in the main focusing lens portion of an electron gun in a cathode ray tube (CRT) provides reduced electron beam spot size and improved video image contrast and pu... | 06/29/1993 |
| 5220239 | High density electron beam generated by low voltage limiting aperture gun The low voltage beam forming region (BFR) of an electron gun such as used in a cathode ray tube (CRT) includes a reduced aperture in an electrostatic field-free region of the gun's G2 screen grid. The electron gun's G1 control grid i... | 06/15/1993 |
| 4942334 | Electron-gun system In a cathode-ray tube with a thick grid No. 2 (24) in the electron-gun system, current transfer into grid No. 2 (24) may result in a lack of picture sharpness. To avoid this error, the aperture (4) in grid No. 2 (24) has a widening (6) of conical shape or... | 07/17/1990 |
| 4891549 | Electron gun system The electron gun system of a color picture tube has coined depressions in the area of the apertures for the electron beams in at least one grid electrode, the coined depressions in one side of the grid electrode being concave. Preferably, this is the side... | 01/02/1990 |
| 4886998 | Electron gun electrode for a color picture tube An electrode of a color picture tube electron gun with a recess provided on the periphery of an electron beam pass aperture, characterized in that the electrode has a thickness of 0.4 to 1.0 times the diameter of the electron beam pass aperture at the por... | 12/12/1989 |
| 4873468 | Multiple sheet beam gridded electron gun A gun for generating a multiple sheet beams 50 of electrons has a flat surfaced cathode 10 with parallel protruding ridges 12 of non-emitting material forming parallel focus electrodes for the sheet beamlets. A control grid of parallel bars 14 is aligned ... | 10/10/1989 |
| 4705985 | Cathode-ray tube and electron gun structure therefor A cathode-ray tube comprising in an evacuated envelope a diode electron gun for generating an electron beam. The electron gun includes a cathode arranged on an axis with its emissive surface extending substantially perpendicularly to the axis, and an anod... | 11/10/1987 |
| 4634925 | Electron gun for a high power klystron An electron gun for a high power klystron which includes a cathode which emits electrons; a focus electrode which, connected to the cathode through a supporting member composed of a material of high electric resistivity, makes the electrons emitted from t... | 01/06/1987 |
| 4629933 | Cathode-ray tube having an electron gun with an astigmatic focusing grid A cathode-ray tube comprising in an evacuated envelope an electron gun for generating at least one electron beam which is focused on a display screen to form a spot and which is deflected in two mutually perpendicular directions so that a raster is writte... | 12/16/1986 |
| 4628224 | Beam shaping CRT electrode A CRT electron gun electrode is provided with an improved beam shaping region having an elongated recess coined in the upper electrode surface and an opposed coined depression in the lower surface. The double coining fabrication method assures a sharp per... | 12/09/1986 |
| 4585976 | Beam penetration CRT with internal automatic constant deflection factor and pattern correction The horizontal and vertical deflection factors for a split anode beam penetration color CRT are compensated for changes and remain constant as trace color is varied. In an electro-statically deflected tube a correction lens near an expansion mesh and elec... | 04/29/1986 |
| 4553064 | Dual-mode electron gun with improved shadow grid arrangement A dual-mode electron gun for a traveling-wave tube is disclosed which selectively generates an electron beam of two different cross-sectional areas. The electron gun includes radially inner and annular control grids as well as a shadow grid disposed betwe... | 11/12/1985 |
| 4500809 | Electron gun having a low capacitance cathode and grid assembly A cathode and grid assembly includes a first grid of small diameter secured to a planar inner surface of a ceramic means and over a central opening in the ceramic means and a second grid having a first planar section secured to a planar outer surface of t... | 02/19/1985 |
