摘要:
A method and system for communicating includes a plurality of cells having base units therein. Each of the base units communicates with a plurality of users within the cells. A communications platform is located in a stratospheric location for transmitting and receiving information with respect to the base units. A gateway station communicates with the communications platform and routes signals to terrestrial networks or other user back through the communications platform. A microcell within at least one of the cells is used to provide coverage in a small geographic area such as within a building. Each of the microcells is also in communication with the gateway station through the platform.
摘要:
A communication system has a high altitude communication device that has an antenna for directing beams to a fixed cell pattern with a polarity of cells. A specific pattern of cells having the same communication resource is provided. Preferably, cells having the same resource are separated. The antenna is shaped to suppress interference with locations having the same resource. The areas not having the same resource are not suppressed to allow the system to have maximum capacity and allow a smaller antenna aperture.
摘要:
A communication system has a high altitude communication device that has an antenna for directing beams to a fixed cell pattern with a polarity of cells. A specific pattern of cells having the same communication resource is provided. Cells having the same resource may be separated. The antenna is shaped to suppress interference with locations having the same resource. The areas not having the same resource are not suppressed to allow the system to have maximum capacity and allow a smaller antenna aperture.
摘要:
A method and system for communicating includes a plurality of cells having base units therein. Each of the base units communicates with a plurality of users within the cells. A communications platform is located in a stratospheric location for transmitting and receiving information with respect to the base units. A gateway station communicates with the communications platform and routes signals to terrestrial networks or other user back through the communications platform. A microcell within at least one of the cells is used to provide coverage in a small geographic area such as within a building. Each of the microcells is also in communication with the gateway station through the platform.
摘要:
A communication system has a high altitude communication device that has an antenna for directing beams to a fixed cell pattern with a polarity of cells. A specific pattern of cells having the same communication resource is provided. Cells having the same resource may be separated. The antenna is shaped to suppress interference with locations having the same resource. The areas not having the same resource are not suppressed to allow the system to have maximum capacity and allow a smaller antenna aperture.
摘要:
The method of recovering metal from a coated condition wherein the same is encased within polyvinyl chloride which comprises disposing the coated metal upon a mesh or other perforated support within a vessel, immersing the same in a bath of tetrahydrofuran under ambient conditions, then closing the vessel containing said mesh or perforated support and permitting the treated material to remain therein in immersed state for a period of time commensurate with the quantity of material to be de-coated and with the thickness of such coating. However, with customary coatings in the order of approximately 1/4" to 3/8", a period of about one hour is adequate and such should be relatively indicative of the periods of time necessary with thicker coatings.
摘要:
The invention provides a novel, low-cost, spin-stabilized lander architecture capable (with appropriate system scaling tailored to the attributes of the target) of performing a soft-landing on a solar-system body such as Earth's Moon, Mars, Venus, the moons of Mars, Jupiter, Saturn, Uranus and Neptune, selected near-Earth and main-belt asteroids, comets and Kuiper belt objects and even large human-made objects, and also moving about on the surface of the target solar-system body after the initial landing in movement akin to hopping.
摘要:
A light weight fuel tank for a hydrogen powered airplane used as a platform for communication repeaters for communication services. An outer spherical shell member of a sandwich configuration surrounds an inner thin walled spherical shell member in which the liquid hydrogen is contained. A radial gap between the shell members is evacuated to a high vacuum. The facing surfaces of the shell members are coated with a low emissivity material. Electrical heaters are provided to control the evaporation rate of the hydrogen to match the fuel usage and to prevent icing during ascent and descent of the airplane.
摘要:
A fire extinguisher of compact, self-contained character is installed in electrical equipment by being mounted within an aperture of a housing for the equipment. The extinguisher has an elongated vessel for containing under pressure a fire extinguishing substance such as halogenated hydrocarbon type. A nozzle is carried at one end of the vessel and is closed by fusible material which melts at a predetermined temperature to permit discharge into the housing. The nozzle is formed as part of a fitting which carries a washer-like disc having an adhesive substance on it to permit adhesive securement of the extinguisher to the equipment housing, with the greatest portion of the vessel extending exteriorly of the housing and only a small portion of the extinguisher thus extending interiorly of the housing. The vessel has a relatively high aspect ratio, such as permitting it to be installed in an aperture defined by an electrical knock-out. The arrangement permits instalation in receptacle boxes, breaker boxes and various domestic and comercial electrical equipment.
摘要:
A zero insertion/retraction force connector is disclosed in which a folded spring is mounted in a housing with the folded spring having an arched portion to one side, one end of which serves as a sliding pivot for an extension which curves back towards the arched portion. This extension forms a moveable contact which is deflected towards a conductive stripe on the edge of a printed circuit board when, in one embodiment, a printed circuit board is inserted into the connector such that the bottom of the printed circuit board depresses the arched portion of the spring. Depression of the arched portion causes the sliding pivot to move laterally and rotate such that the extension swings into contact with one side of the printed circuit board and slides upon the conductive stripe in a wiping action while pressing the other side of the board against a vertical wall of the connector to sandwich the printed circuit board between the moveable contact and the wall. The printed circuit board is clamped into place to maintain the contact pressure by the depression of the arched portion. Release of the printed circuit board is accomplished by unclamping the circuit board which permits the upward motion of the printed circuit board and release of the arched portion, with the elasticity of the spring causing the moveable contacts to swing away thereby releasing the printed circuit board.