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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 |
| 5087389 | Method of measuring the efficiency of gas mask filters using non-toxic mono dispersed aerosols An improved process of passing an aerosol mixture through a filter. The asol mixture solely contains in percentage, by volume, of about: ______________________________________ % Chemical ______________________________________ ... | 02/11/1992 |
| 5033852 | Optical measuring device for measuring the fat contents of milk An optical measuring device for measuring the fat contents of milk comprises a light source, an optical condenser, a glass test tube provided for holding a set amount of the milk the fat contents of which must be measured, a lens, a photosensitive element... | 07/23/1991 |
| 5030002 | Method and apparatus for sorting particles with a moving catcher tube A sorter with a body member passageway has analysis, pre-analysis and post analysis portions for particles. An elongate catcher tube carried on the body member, and mounted with its axis to be selectively aligned with the analysis portion for intermittent... | 07/09/1991 |
| 5017497 | Particle discriminator and method Method and apparatus for analyzing particles based on different depolarizing structure associated with the different particle types. Cells in a flow cytometer are illuminated with a linearly polarized light, producing scattered depolarized light whose int... | 05/21/1991 |
| 5015094 | Particle size measuring system There is disclosed a system in which, according to the time domain method, a laser light is irradiated to an object to be measured, photon pulses based on the scattering light from the object to be measured are received, time series data are generated bas... | 05/14/1991 |
| 4939081 | Cell-separation A method and apparatus for separating particles by means of a contra-flow centrifuge, wherein a monitor system is used to analyze or control the separation process. The monitor system used impinges a monochromatic light beam on a sample of the separated p... | 07/03/1990 |
| 4927267 | Method and apparatus for optically measuring, without contact, the granulometry of a cloud of particles or the roughness of a surface The invention relates to the measurement of the granulometry of a cloud of particles or of the roughness of a surface in real time and without contact, by means of an apparatus comprising: a convergent lens (9) adapted for forming a diffraction pattern of... | 05/22/1990 |
| 4919536 | System for measuring velocity field of fluid flow utilizing a laser-doppler spectral image converter A flow field seeded with small particles is illuminated by collimated, monochromatic laser light sheet 16. Doppler shifted scattering from particle motion is imaged by an optical system 22. An optical frequency-to-intensity converter 24 is located at the ... | 04/24/1990 |
| 4895446 | Particle detection method and apparatus An apparatus and method are disclosed for detecting the presence of particles on the surface of an object such as the front side of a patterned semiconductor wafer. A collimated beam of light is directed onto an area on the surface of the object at a graz... | 01/23/1990 |
| 4818071 | Fiber optic doppler anemometer A fiber optic doppler anemometer comprises a source of coherent light, a directional coupler formed by the combination of a pair of single-mode optical fibers, and a photoelectric transducer. The first end of the first fiber receives an incident beam of l... | 04/04/1989 |
| 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 |
| 4790650 | Condensation nucleus counter A condensation nucleus counter (1) for measuring particulate concentration within a gaseous environment, including an inlet orifice (3) leading to a flow path (5) within saturator (4). The resultant vapor (10) enters a condenser section (11) wherein the p... | 12/13/1988 |
| 4772126 | Particle detection method and apparatus An apparatus and method are disclosed for detecting the presence of particles on the surface of an object such as the front side of a patterned semiconductor wafer. A vertically expanded, horizontally scanning, beam of light is directed onto an area on th... | 09/20/1988 |
| 4637716 | Fiber-optical Doppler anemometer In a fiber-optical Doppler anemometer for measurement of fluctuating light or the Doppler broadening of laser light scattered by a scattering medium, for example by particles in motion, coherent laser light is passed via a fiber-optical coupler (1) and a ... | 01/20/1987 |
| 4596465 | Scattered light type smoke detector A scattered light type smoke detector wherein a light source and a photo-cell are so disposed that light from the light source does not directly enter the photo-cell and the photo-cell is adapted to receive light from the light source scattered by interve... | 06/24/1986 |
| 4521521 | Particle reagent size distribution measurements for immunoassay A highly sensitive and rapid method for quantitatively assaying analytes in liquid media by directly measuring changes in particle size distribution of reagent particles having analyte insolubilized thereon in a system undergoing antibody-induced aggregat... | 06/04/1985 |
| 4435080 | Arrangement for measurement of dynamic properties of microparticles The disclosure teaches a device for measuring the dynamic properties of microparticles including at least two flat measuring bodies or discs spaced from each other, with the distance therebetween being adjustable and the space therebetween being filled wi... | 03/06/1984 |
| 4297032 | Dark field surface inspection illumination technique A method and apparatus for observing imperfections on the surface of and imbedded in an optical sample using a dark field technique. Linearally polarized laser light is entered by a prism-fluid index matching method which causes internal reflection at the... | 10/27/1981 |
| 4242194 | Apparatus for spectroscopic measurement of the velocity of particles in a fluid In electrophoretic apparatus measuring the velocity of particles in a fluid, a reference beam and a scattered beam scattered by the particles in the fluid at various scattering angles must be heterodyned in order that the Doppler frequency shift resulting... | 12/30/1980 |
| 4110043 | Apparatus for counting and classifying particles Apparatus for counting and classifying particles and including a laser for producing a laser beam, a flow nozzle for hydrodynamically focussing a stream of such particles and directing the focussed stream to intersect the laser beam, a focussing system ca... | 08/29/1978 |
| 4080264 | Immunoassay by light scattering spectroscopy This inventin provides a means for determining the concentration of any of a wide range of antibody or antigen molecules with a high degree of specificity, accuracy and sensitivity. Antigen or antibody concentration is determined by effecting an agglutina... | 03/21/1978 |
| 4050820 | Light-reflecting analytical device A device is disclosed for spectral analysis of light reflected from liquid crystal materials. The device includes a light source, a liquid crystal material stage, and a scattered light receiving screen. In operation, the liquid crystal material stage and ... | 09/27/1977 |
