Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 8172457 | Method and sensor for determining the hydrocarbon dew point in a gas The invention relates to a method and a sensor for determining the hydrocarbon dew point in a gas, in particular in a gaseous fuel. According to the invention a roughened condensation surface is provided on a planar measurement surface of a transparent body. Light i... | 05/08/2012 |
| 7380980 | Detector for detecting state on detection surface The long-side surface of a triangular prism is a detection surface. The distal end portions of coaxial light-emitting/light-receiving optical fiber cables are joined to one short-side surface of the prism. A thermoelectric cooling element is mounted on the other sho... | 06/03/2008 |
| 6926439 | Dew point hygrometers and dew sensors A dew point hygrometer for determining the dew point of a gas in which a displaceable transparent film is in contact with the gas and forms a condensation surface. The film is placed on a temperature control device controlling its temperature and an optic fiber, emi... | 08/09/2005 |
| 6726360 | Intensity modulated fiber optic temperature switching immersion probe The present invention provides an intensity modulated optical fiber temperature switching immersion probe for remote temperature monitoring and switching of an industrial process. The present invention also provides a method for remote sensing of temperature. ... | 04/27/2004 |
| 6250134 | Apparatus for determining the dew-point and/or the content of vapor in the air The apparatus for determining the dew-point and/or the content of vapor in the air, particularly for the use in radio sondes, comprises a dew-point mirror assembly, including a source of light, a reflector, a cooling element thermally coupled to the refle... | 06/26/2001 |
| 6164817 | Fiber optic hygrometer apparatus and method A fiber optic hygrometer apparatus and method for sensing and measuring the dew point of an atmosphere is disclosed that includes a controller for controlling the operation of the apparatus and a first optical fiber for transmitting light energy from a so... | 12/26/2000 |
| 6076959 | Total-internal-reflection type deposit point sensor A novel method for measuring a deposit point is provided, which makes it possible to quickly and accurately measure a cloud point. A test sample is irradiated at an angle of incidence θ with an incoming light beam which satisfies an expression θ | 06/20/2000 |
| 5507175 | Cycling chilled mirror dewpoint hygrometer including a sapphire optical mirror A cycling chilled mirror hygrometer is described wherein the mirror employed comprises a sapphire substrate having deposited thereon alternating layers of titanium dioxide and silicon dioxide. The surfaces resulting from the described technology yield a t... | 04/16/1996 |
| 5460450 | Cryogenic hygrometer A dew or frost point temperature hygrometer wherein a reflective surface, which is cooled by a cryogenic source and held at the dew or frost point temperature by a servo control, reflects light from a light source to a light detector. Very low concentrati... | 10/24/1995 |
| 5299867 | Low moisture cryogenic hygrometer A dew or frost point hygrometer wherein a reflective surface, which is cooled by a cryogenic source and held at the dew or frost point-temperature by a servo control, reflects light from a light source to a light detector. Very low concentrations of moist... | 04/05/1994 |
| 5028143 | Humidity dew point sensor An elongated mirrored surface has a temperature gradient established thereacross. Condensation forms along the mirrored surface and the edge of the condensation next to the portion of the mirrored without condensation is where the dew point temperature ex... | 07/02/1991 |
| 5022045 | Optical-type, phase transition humidity-responsive devices The invention is directed to chemical compositions suitable for use in salt-solution transition temperature or hot mirror devices. It also provides methods of using these sensors (for the measurement of the humidity of gases) as well as the apparatus. The... | 06/04/1991 |
| 4946288 | Dew point analyzer The dew points of condensible hydrocarbon and water in a gas stream are determined independently in a single run by observing changes in intensity of light scattered from a mirror surface which is cooled to below both of the dew points. A decrease in inte... | 08/07/1990 |
| 4799235 | Apparatus for measuring dew-point of a gas stream with light scattering An apparatus for measuring dew-point of a gas stream includes a sensor cell having a probe, means for cooling the probe, means for transmitting light to the probe surface in a pressurized chamber, means for receiving returned light scattered from the cool... | 01/17/1989 |
| 4179917 | Low pressure dew and frost point indicator A low pressure dew and frost point indicator of the type having a vortex tube which directs a cold air stream against the back of a viewing mirror for observation of the initial formation of frost. The mirror has means for simple and automatic centering w... | 12/25/1979 |
