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Magician Harry Houdini patented a "Diver's Suit" enabling the wearer to "quickly divest himself of the suit while being submerged and to safely escape and reach the surface of the water."
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| Number | Title | Issue Date |
| 7268477 | Cathode-ray tube having an electron gun with an improved main focus lens A cathode-ray tube has an electron gun with a main focusing lens, wherein each electrode comprises a rectangular aperture whose large dimension is along the horizontal axis (Ox) and terminating at its two ends in two identical semi-ellipses of order n that are symme... | 09/11/2007 |
| 6696780 | Electron gun comprising a tubular electrode having a coiled portion formed therein An electron gun that can provide a desired electron beam modulation effect without preventing a modulation magnetic field from passing from an exterior of the vacuum portion is provided. A part of a tubular G3 electrode in an electron gun is formed into a... | 02/24/2004 |
| 5990608 | Electron gun having a cathode with limited electron discharge region An electron gun provides an improved focusing characteristic of electron beams surely and effectively, and permits position alignment to be relatively easy in assembling thereof. In an electron gun which includes a cathode for discharging electrons and a ... | 11/23/1999 |
| 5847500 | Electron gun for color cathode ray tube and method of manufacturing the electron gun electrode In an electron gun for a cathode ray tube in which a focus electrode group includes a single platelike electrode having three apertures arrayed in one plane and a thickness equal to a depth of each of the three apertures, a tapered surface is formed on th... | 12/08/1998 |
| 5686785 | Electron gun having electrically isolated and adjustable cathode An electron gun for producing a beam of electrons has an elongated, linear thermionic cathode and a focusing electrode. The opposite ends of the cathode are engaged by adjustable holders which enable the spatial separation between the cathode and focusing... | 11/11/1997 |
| 5631471 | Device to irradiate surfaces with electrons The invention relates to a device to irradiate surfaces with electrons, especially to harden surface layers. The device includes a vacuum chamber that has an electron beam window; an electron beam-permeable film that closes off the vacuum chamber from the... | 05/20/1997 |
| 5585691 | Electron beam generation and control for dynamic color separation A dynamic color separation display CRT having an electron beam forming structure for beam generation and electrostatic impingement control. The electron gun forms a group of electron beams and includes a multi-aperture G1 grid for receiving the electron b... | 12/17/1996 |
| 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 |
| 5343113 | Cathode ray tube apparatus with reduced beam spot size There is disclosed a cathode-ray tube which employs an electron gun assembly of the laminar flow (LF) type. The beam emanating from the LF electron gun assembly is directed through a three-electrode einzel lens assembly where the center electrode of the e... | 08/30/1994 |
| 5033072 | Self-limiting x-ray tube with flat cathode and stair-step focusing device Problems of thermal resistance of the anode of an x-ray tube are solved by constructing a flat cathode which is set within a stair-step focusing device. It is shown that, depending on the shape of this device, the heat output on the anode is limited by a ... | 07/16/1991 |
| 4724359 | Laminar flow guns for light valves A laminar flow electron gun (16) for use in a light valve of the Schlieren dark field type is disclosed. The gun uses three accelerating electrodes (111, 112 and 113) with critical axial spacing to beam diameter ratios to allow independent adjustment and/... | 02/09/1988 |
| 4698835 | X-ray tube apparatus An X-ray tube apparatus is disclosed, which comprises a vacuum envelope and, an anode target and a cathode assembly both disposed in the envelope and facing each other. The cathode assembly includes a filament for emitting an electron beam, filament suppo... | 10/06/1987 |
| 4616160 | Multiple beam high definition page display A high definition page display system for graphics and text utilizing multiple beams in a CRT is disclosed. Information for the several lines which are written simultaneously is made available in parallel. The invention is described in terms of a characte... | 10/07/1986 |
| 4426599 | Television camera tube A television camera tube comprising, in an evacuated envelope, an electron gun to generate an electron beam which during operation of the tube is focused to form a spot on a photosensitive target. On the target, a potential distribution is formed by proje... | 01/17/1984 |
| 4412153 | Dual filament ion source An electron bombardment ion source of the Freeman type incorporates an electrode having multiple segments which are electrically connected in parallel to provide increased surface area for constant cross section.... | 10/25/1983 |
| 4344011 | X-ray tubes In an X-ray tube comprising a cathode electrode including a filament for emitting electrons and a focusing electrode having a focusing groove adapted to contain the filament, and an anode electrode opposing the cathode electrode and maintained at a high p... | 08/10/1982 |
| 4241275 | In-line type electron gun structure for color picture tubes In an in line type electron gun structure for a color picture tube wherein electron guns are arranged in line, the electron-beam-pass apertures of at least one set of corresponding electrodes of the respective electron guns for forming pre-focus lens are ... | 12/23/1980 |
| 4126811 | Electron gun with linear thermionic cathode for electron-beam heating An electron gun comprises a linear thermionic cathode having part of its emitting surface facing an accelerating anode, and the rest of the emitting surface separated by a gap from a cathode-adjacent focusing electrode. The cathode-adjacent focusing elect... | 11/21/1978 |
| 3980919 | Rectangular beam laminar flow electron gun A laminar flow electron gun employing a narrow, elongated cathode for forming a rectangular beam and a plurality of electrodes having narrow, elongated apertures cooperating with said cathode to draw electrons from said cathode and operate on the electron... | 09/14/1976 |
| 3952224 | In-line electron guns having consecutive grids with aligned vertical, substantially elliptical apertures In the tube gun, the apertures of the two grids closest to the cathodes are vertically elongated or, preferably, vertically elliptically shaped to provide at least partial compensation for beam distortion occuring in a deflection zone of the tube.... | 04/20/1976 |
