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...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 5946093 | Particle detection system and method employing an upconversion laser A particle detector (10, 12, 70) employs an upconversion laser medium (22, 72) to produce emission radiation (32) at an emission wavelength (56) that is less than the wavelength of the pumping radiation (26). The shorter emission wavelength (56) provides ... | 08/31/1999 |
| 5903347 | Particle counter employing a chromium based solid-state laser with an intracavity view volume A particle detector employs a resonant cavity having a chromium doped colquiriite crystal lasing medium, such as an Cr:LiSrAlF6 crystal, adjacent to an intra-cavity view volume. The resonant cavity is defined by two spaced apart mirrors, with t... | 05/11/1999 |
| 5872622 | Condensation nucleus counter having vapor stabilization and working fluid recovery A particle counter of the condensation nucleus type wherein a primary stream of fluent material containing particles enlarged by vapor condensate of a working fluid flow through a viewing volume. A secondary stream of fluent material, termed purge gas, su... | 02/16/1999 |
| 5864399 | Method for counting particles in a fluent stream A particle detector employs a laser having a solid-state lasing medium, such as an Nd:YAG crystal, disposed in a resonant cavity, and includes an intracavity view volume. The resonant cavity is defined by two spaced apart mirrors, with the laser medium po... | 01/26/1999 |
| 5684585 | Optical particle counter employing a field-calibrator A particle counter including a modulator to allow electronically determining calibration. The modulator is connected to a driving circuit of a source of light to cause the light to emit a beam of a constant amplitude, representing at least one particle of... | 11/04/1997 |
| 5675405 | Condensation nucleus counter employing supersaturation by thermal differentiation A condensation nucleus counter features an entropy control mechanism to regulate the entropy of a vaporized fluid present in a saturator, thereby facilitating supersaturation of the same about particulates entrained in a sample gas stream before the same ... | 10/07/1997 |
| 5664599 | Flow controller for a particle sensor Provided is a gravity feed flow controller in which fluid communication with a particle sensor allows gas bubbles, present in a liquid flowing therethrough, to escape, under influence of a buoyant force associated therewith, before entering the sensor.... | 09/09/1997 |
| 5642193 | Particle counter employing a solid-state laser with an intracavity view volume A particle detector employs a laser having a solid-state lasing medium, such as an Nd:YAG crystal, disposed in a resonant cavity, and includes an intracavity view volume. The resonant cavity is defined by two spaced apart mirrors, with the laser medium po... | 06/24/1997 |
| 5565984 | Re-entrant illumination system for particle measuring device Small, mobile particles in a fluid are optically detected by an apparatus having spaced apart reflectors bordering and defining an optical cavity into which a light beam is introduced. The reflectors are arranged along axes which are slightly misaligned s... | 10/15/1996 |
| 5438420 | Monitoring of fluid contamination level wherein the light energy is focused on the fluid passage means Apparatus for monitoring fluid contaminant level that includes a light source positioned on one side of a fluid sample path for directing light energy into fluid flowing in the sample path, a photosensor positioned on the same side of the sample path, and... | 08/01/1995 |
| 5084629 | Split flow uniform multisensor detection An apparatus for detecting and counting particles in a gas stream flowing at a preselected rate, wherein the apparatus includes a multi-tier inlet manifold and a plurality of sensors. The inlet manifold divides an aggregate sample flow into a plurality of... | 01/28/1992 |
| 5011286 | Multisensor particle counter utilizing a single energy source An apparatus and method for particle detection which includes a plurality of sample regions. A sensor body has internal walls which define spaced apart sample regions, with each sample region having an inlet port and an exhaust port. An aggregate sample f... | 04/30/1991 |
