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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 4373030 | Polycrystalline translucent alumina sintered body, a method for producing the same and a high pressure vapor discharge lamp obtained by using said sintered body A polycrystalline translucent alumina sintered body having high in-line transmission, which is suitable for an envelope for a high pressure vapor discharge lamp, is produced by adding to alumina powder having a purity of more than 99.8% MgO or a compound ... | 02/08/1983 |
| 4361779 | Lamp having a lamp vessel made of quartz glass, quartz glass and method of preparing quartz glass A quartz glass lamp vessel 1 or 21 is used in many types of lamps. Sometimes it is expedient to absorb a certain portion of the emission spectrum. In accordance with the prior art this is possible by including rare earth metal oxides in the quartz glass. ... | 11/30/1982 |
| 4354139 | Low-pressure mercury vapor discharge lamp A low-pressure mercury vapor discharge lamp for radiation purposes having a discharge tube made of glass with selective transmission, the tube being coated on the inside with a luminescent layer. This layer contains a luminescent material which has the ch... | 10/12/1982 |
| 4345180 | Envelope for metal halide discharge lamp with protective layer containing B2 O3 A lamp envelope comprised of silica glass having a SiO2 -B2 O3 glass layer on an inner surface thereof is coated on the free surface of such SiO2 -B2 O3 glass layer with a protective layer ... | 08/17/1982 |
| 4310773 | Glass flash tube A xenon flash tube is disclosed utilizing a particular borosilicate glass for the lamp envelope which is sealed directly by hermetic seal to inleads of a metal alloy predominantly of iron, nickel and cobalt. Additionally, said flash tube employs particula... | 01/12/1982 |
| 4298005 | Radiation apparatus A radiation apparatus for cosmetic, photobiological and/or photo chemical purposes containing at least one ultraviolet ray source and devices for operation for the production of the ignition voltage and operating current and a filter device for emitting r... | 11/03/1981 |
| 4238705 | Incandescent lamp seal means Hermetic seal construction for an incandescent lamp is described wherein a composite inlead structure is employed. A pair of inleads connected to the resistive incandescent filament in said lamp are joined at the opposite ends to larger diameter inlead wi... | 12/09/1980 |
| 4182972 | Transparent polycrystalline alumina and high pressure vapor discharge lamp A polycrystalline alumina has at least 50% unit surface area provided by crystals of at least 60 μm, and preferably 100 μm size. This improves the in-line transmission value and hence lamp efficiency in a tube for a high pressure metal vapor lamp having... | 01/08/1980 |
| 4179640 | Hid sodium lamp which incorporates a high pressure of xenon and a trigger starting electrode High-intensity-discharge sodium lamp incorporates as a starting gas xenon at a pressure between 50 and 300 torrs, in order to improve the lamp efficiency and the spectral power distribution of the discharge. To facilitate lamp starting on a conventional p... | 12/18/1979 |
| 4177437 | High power pre-TR switch A high power pre-TR switch utilizes hot pressed boron nitride to form a vial. The vial contains a halogen gas such as chlorine.... | 12/04/1979 |
| 4163171 | Halogen cycle incandescent lamp An incandescent lamp having a hard glass envelope, a tungsten filament, and an inert gas fill containing a halogen or halide additive. The hard glass envelope contains substantially no alkali or carbon monoxide and is preferably devoid of these materials.... | 07/31/1979 |
| 4156826 | Mercury arc lamps A mercury arc lamp envelope is made of high purity synthetic fused silica which contains total metallic impurities of less than one part per million by weight and OH radical content of less than five parts per million by weight. Lamps having envelopes mad... | 05/29/1979 |
| 4155758 | Lamps and discharge devices and materials therefor Conducting cermets with volume fractions of nickel down to 0.045 are produced by coating relatively coarse refractory oxide granules with fine metal powder particles and compacting and sintering the coated granules. Using oxide granules in the size range ... | 05/22/1979 |
| 4150317 | Polycrystalline alumina material Increased optical transmission is provided for a body of light transmissive polycrystalline alumina having relatively uniform size equiaxed grains of alumina and which is essentially free of porosity and secondary phase material. A tube of the improved op... | 04/17/1979 |
| 4122042 | Composite body useful in gas discharge lamp A composite body consisting of two or more formed parts of densely sintered aluminum oxide and a metal such as an envelope for a mercury vapor discharge lamp with a metal halide filling. The parts are connected together with material which comprises at le... | 10/24/1978 |
| 4105826 | High-temperature glass composition Aluminosilicate glasses containing BaO and CaO are provided having combined high softening points along with exceptionally low liquidus temperatures. These glasses are within the following compositional limits in percent by weight: except for incidental i... | 08/08/1978 |
| 4091951 | Lamps for high powers A lamp, particularly for high powers, whose envelope consists of lime glass and in which in a 30μ thick surface layer Na+ - and/or Li+ ions are replaced by larger ions. This results in a compressive stress in the layer which is at ... | 05/30/1978 |
| 4016445 | Deuterium arc lamp A UV source comprising an arc lamp containing deuterium gas at an initial fill pressure in excess of that at which peak UV light intensity occurs, thereby extending the useful life of the lamp.... | 04/05/1977 |
| 4001624 | Soft glass flashtube A xenon flashtube having an envelope formed of soft glass tubing with a pair of electrodes disposed at each end of the envelope for providing a wall-stabilized discharge. The use of soft glass permits a match seal to dumet lead-in wires and results in a l... | 01/04/1977 |
| 3961970 | Reed switch construction A reed switch construction is disclosed in which the glass envelope has thermal expansion characteristics matching those of the reeds below the glass setting point, has relatively high electrical resistivity and low devitrification tendencies, and is, in ... | 06/08/1976 |
| 3949335 | Reed switch construction A reed switch construction is described embodying magnetic metal reeds and an improved glass envelope. The envelope is drawn from an infrared absorbing glass having a steep viscosity curve which permits forming a seal between the metal reeds and the glass... | 04/06/1976 |
| 3941604 | Fast-firing ceramic composition and ceramic article made therefrom Scrap glass is crushed and mixed with selected quantities of ball clay and wollastonite, the resulting raw-mix is press-molded into a green compact, and the latter is fired in air at a temperature above the softening point of the glass particles to provid... | 03/02/1976 |
| 3935495 | Chemically polished polycrystalline alumina material Increased optical transmission is provided for a body of light transmissive polycrystalline alumina body treated at elevated temperatures with a molten flux composition. A tube of the flux polished material which can be used as the light transmissive enve... | 01/27/1976 |
