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An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 7259384 | Fluid level optical detector with float having opaque and transmissive portions Systems and methods for fluid level detection are disclosed. In one embodiment, a sensor assembly includes at least one optical fiber adapted to at least one of transmit and receive an optical signal, and a moveable float member. The float member is adapted to move ... | 08/21/2007 |
| 7234830 | Optical switch An optical switch having a housing, a light source and a light detector. The light source and light detector are located remote from the housing. The light source is connected to the housing with a first light guide, and the light detector is connected to the housin... | 06/26/2007 |
| 7104127 | Nondestructive method for inspecting cladding tubes The present invention relates to a nondestructive method or inspecting defects of the cladding of a nuclear fuel rod, which is featured by a wave emitter obliquely discharging an inspection wave to an inspected tube and a receiver arranged at a side of the inspected... | 09/12/2006 |
| 6801678 | Fiber optic level detector A fiber optic liquid level detector uses optical fibers to detect the presence or absence of liquids. The waveguide properties of optical fibers tends to deviate from the normal dielectric interfaces so that a fiber immersed in a liquid has a reflection coefficient ... | 10/05/2004 |
| 6333512 | Optical gauge for determining the level of a medium in a container An optical gauge for measuring the level of a liquid in a container comprises an elongate, tubular member with a central bore. A light source is positioned for projecting radiant energy into the bore along a length of the tubular member. An elongate light... | 12/25/2001 |
| 5796856 | Gap measuring apparatus and method An apparatus and method to measure a gap width distance, specifically the distance between the lip of a coating hopper and the tangential edge of a coating roller or the support on the roller, is disclosed herein. The apparatus includes a long range micro... | 08/18/1998 |
| 5743135 | Optical-fiber liquid-level monitor A liquid level monitor uses a tube to confine a float to a vertical path with a canister containing a lower liquid and an upper liquid which meet at a liquid boundary, the level of which is to be monitored. Light from a light-emitting diode is conveyed to... | 04/28/1998 |
| 5705815 | Device for the detection of liquid surfaces Device for the detection of liquid surfaces including a light source sending light onto a liquid surface, an oscillation element which is moved toward the liquid surface and causes the liquid surface to oscillate upon contact with the surface. The surface... | 01/06/1998 |
| 5606125 | Material level-interface control system An optical temperature compensated material level-interface sensing and control system which comprises an insertion probe (10), control circuitry and a housing enclosure (72). The probe (10) makes use of a pair of emitters and detectors, in which one pair... | 02/25/1997 |
| 5425624 | Optical fluid-level switch and controls for bilge pump apparatus An optical bilge pump apparatus has two optical fibers with gaps cut therein and associated light transmitters-receivers. The apparatus is responsive to high and low liquid levels in the pump such that the pump is turned on when both gaps in the optical f... | 06/20/1995 |
| 5257539 | Electronic oil level indicator An electronic oil level indicator is provided to show the amount of oil in an oil pan of an internal combustion engine which consists of a perforated housing positioned in the oil pan, so that the oil in the oil pan will enter the housing. A mechanism is ... | 11/02/1993 |
| 5245200 | Apparatus and method for preventing blockage of a measuring head for effecting measurements of suspended substances An apparatus for preventing blocking of a measuring head intended for carrying out measurements on substances suspended in a flowing medium. A light beam is transmitted from a radiation source with a determined intensity which is essentially constant duri... | 09/14/1993 |
| 4954724 | Optical fuel gauge for vehicles The basic concept of the fuel gauge of this invention is to make use of the difference in refraction of liquid and air by means of optical fibres. More particularly, the fuel gauge includes a first set of optical fibers connected to a light source, a seco... | 09/04/1990 |
| 4950885 | Fluid coupled fiber optic sensor A passive transducer apparatus and method of use for producing a useful output light signal in response to a sensed condition. The sensed condition varies the light emitted from a first fiber optic light conductor that is apparently captured or detected b... | 08/21/1990 |
| 4694161 | Fluid flow and level detector The invention is directed to the use of magnets and fiber optics for detecting fluid flow and fluid levels. In general, the invention employs a permanent magnet movable by fluid flow or by the change of fluid levels which directly influences the degree of... | 09/15/1987 |
| 4630476 | Liquid level gauge A liquid level gauge including an elongate support member, and, a plurality of optical fibres carried by the support member, said fibres extending on the support member generally lengthwise thereof and generally parallel to each other, said fibres being s... | 12/23/1986 |
| 4515479 | Electro-optical sensors with fiber optic bundles A method and apparatus for determining the dimension, location, orientation, presence, or identity of at least a portion of an object. An object or a portion thereof is imaged onto an end of an at least partially non-coherent optical fiber bundle whereby ... | 05/07/1985 |
| 4275295 | Limit and measurement value transmitter PCT No. PCT/CH78/00023 Sec. 371 Date May 23, 1979 Sec. 102(e) Date May 23, 1979 PCT Filed Oct. 2, 1978 PCT Pub. No. WO79/00180 PCT Pub. Date Apr. 19, 1979 In the measuring and control technics, indicators for a limit value and measurement value working fo... | 06/23/1981 |
| 3995168 | Electro optical fluid measurement system A device for the outside display of the level and specific density of a liquid contained within a tank, particularly for inflammable liquids, characterized by a plurality of paired light pipes having optical interface means therebetween located at interva... | 11/30/1976 |
