Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 4724352 | Short-arc lamp with alternating current drive A short-arc lamp of the type having an internally integral reflector including electrodes mounted to extend along a central axis of symmetry of the lamp and having distal ends of similar shape which are spaced apart to define a short-arc gap such that the... | 02/09/1988 |
| 4673843 | DC discharge lamp An electrically-conductive member is provided on the outer wall of a cathode-sealing portion of a dc discharge lamp such as a super high pressure mercury vapor lamp, and the electrically-conductive member is electrically connected to a sealed cathodic con... | 06/16/1987 |
| 4672270 | Metal vapor discharge lamp having a starting device of a thermal switch type A metal vapor discharge lamp has a burner for sealing xenon gas, mercury and a light-emitting additive in a translucent ceramic tube, a starting device of a thermal switch type which has a series circuit of a thermal switch and a coil filament and which i... | 06/09/1987 |
| 4599540 | High intensity arc lamp An improved short-arc gas discharge lamp having a solid ceramic body with an integral reflector surface. The lamp includes a sapphire window, fitted to one end of the ceramic body, and a thermally and electrically conductive base fitted to the opposite en... | 07/08/1986 |
| 4490651 | Laser triggered high voltage rail gap switch The laser-triggered high voltage rail gap switch includes two parallel electrodes in a high pressure environment of SF6 and Ar. A pulsed UV laser directs a coherent beam parallel to the electrodes to initiate multichannel breakdown in the gap b... | 12/25/1984 |
| 4401920 | Laser triggered high voltage rail gap switch The laser-triggered high voltage rail gap switch includes two parallel electrodes in a high pressure environment of SF6 and Ar. A pulsed UV laser directs a coherent beam parallel to the electrodes to initiate multichannel breakdown in the gap b... | 08/30/1983 |
| 4305020 | Fail-safe switch which renders HID lamp inoperative upon breakage of outer envelope A high-intensity discharge lamp which has a lamp current-interrupting device in series circuit with the arc tube which is sensitive to any breach occurring in the protective outer envelope. The current-interrupting constituent of the device initially inco... | 12/08/1981 |
| 4282395 | High melting point glass-to-metal seal and melt connection, particularly for tungsten supply wires for high-pressure discharge lamps To permit direct melting-in of a rod or wire-shaped conductor through a gs wall of quartz glass (thermal coefficient of expansion: 5-6.10-7 /°C.) in which the wire, for example, is tungsten (thermal coefficient of expansion: 45.10-7 | 08/04/1981 |
| 4260929 | High-pressure sodium vapor discharge lamp The invention relates to a high-pressure sodium vapor discharge lamp provided with a discharge tube containing mercury and xenon as well as sodium. The sodium vapor pressure--in the operating condition of the lamp--is within a given range. In accordance w... | 04/07/1981 |
| 4229658 | Xenon light apparatus for supplying ultraviolet and visible spectra A handheld lamp is disclosed wherein the light source is a rapid pulse unconfined xenon arc tube containing more than three atmospheres of xenon gas pressure, and providing a selectable spectral output of ultraviolet, visible, or ultraviolet and visible w... | 10/21/1980 |
| 4190786 | Discharge lamp A discharge lamp of the type which seals mercury and a rare gas in a bulb having sealed therein a pair of electrodes and in which both the mercury and the rare gas contribute to discharge radiation. Letting the value of the quantity of mercury (mg/cc.) se... | 02/26/1980 |
| 4151446 | Electronic flash apparatus An electronic flashlight apparatus comprising a flash tube filled with a noble or inert gas of a pressure greater than the atmospheric pressure and having main electrodes and a trigger electrode arranged to receive a triggering pulse from a trigger circui... | 04/24/1979 |
| 4146812 | Motor vehicle headlight having filling hole sealed with non-rigid material A motor vehicle headlight comprises a curved reflector having a lens bonded to the front thereof. A tungsten-halogen capsule is disposed within the reflector. A filling hole extends through the rear of the reflector, the hole being hermetically sealed by ... | 03/27/1979 |
| 4146813 | High-pressure sodium vapor discharge lamp The invention relates to a high-pressure sodium vapor discharge lamp comprising a discharge tube containing sodium and xenon. In accordance with the invention the inside diameter of the discharge tube is below 5 mm and greater than 1 mm. In addition the xenon ... | 03/27/1979 |
| 4112335 | Rapid pulse ultraviolet light apparatus An ultraviolet lamp is disclosed wherein the light source is a rapid pulse unconfined xenon arc tube containing more than three atmospheres of xenon gas pressure, and providing an output limited to wavelengths greater than 320 nanometers. Associated circu... | 09/05/1978 |
| 4075505 | Molecular emission lamp A method and apparatus for producing molecular radiation of a single selected gas by generating resonance photons characteristic of the single gas and at a first frequency, and directing the resonance photons into a container of the single gas producing e... | 02/21/1978 |
| 4061939 | Low noise sodium vapor lamp for sonic pulse operation Jacketed high pressure sodium vapor lamps of conventional construction operated on sonic frequency pulses with short duty cycles in order to raise the color temperature produce excessive acoustic noise. The noise level is reduced by using non-magnetostric... | 12/06/1977 |
| 4035683 | High voltage electric switch with trigger electrodes integral with main discharge electrodes This invention provides a compact high voltage electric switch having a fast switching time. The switch comprises two spaced-apart main electrodes defining a breakdown gap, in which an insulating gas is present, and a trigger means in close proximity to t... | 07/12/1977 |
| 4032862 | High power electrodeless gas arc lamp for pumping lasers An electrodeless RF excited gas arc lamp for pumping a laser has a lamp envelope in the form of a loop having a continuous bore containing krypton, xenon or argon. Sufficient RF power to maintain a plasma in the gas in the loop is provided by a coil aroun... | 06/28/1977 |
| 4027185 | High intensity radiation source The novel radiation source system of this invention includes a pair of electrodes which are coaxially mounted at each end of a single cylindrical transparent arc chamber. A liquid, such as water, is circulated through the arc chamber with a tangential vel... | 05/31/1977 |
| 4015157 | Iodine lamp with molybdenum parts A long life tungsten halogen lamp comprising a fused silica envelope containing a coiled tungsten filament connected across inleads sealed therein which include inner portions of molybdenum wire. The molybdenum wire has been treated to increase its ductil... | 03/29/1977 |
| 3988626 | Magnetically stabilized xenon arc lamp An improved lamphousing having a magnetically stabilized arc lamp. The arc lamp, such as a high-pressure short-arc xenon lamp, is mounted within the lamphousing such that the arc is positioned at the focal point of a reflector formed from a paramagnetic m... | 10/26/1976 |
