Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7603900 | Leakage inspection apparatus for liquid storage tank technical field At least a part of a periphery of a liquid storage tank is submerged in water. A leakage inspection apparatus has a depressurizing device that depressurizes the inside of the liquid storage tank. The apparatus includes a rod part inserted in the liquid storage tank.... | 10/20/2009 |
| 7562571 | Device and method for detecting material by means of gravitational field analysis Described is a sensor for filling level measurement using a gravitational field analysis, comprising a first and a second gravimeter unit. The measurement is effected in a contactless manner, via the container wall and without input of energy into the filling good. ... | 07/21/2009 |
| 7490515 | Liquid level measuring system A non-contact type sensor that measures a liquid level in a non-contact fashion and outputs a measured value as a digital pulse is provided. Then, a sensor-output converting circuit is caused to input the digital pulse, which is output from the non-contact type sens... | 02/17/2009 |
| 7377163 | Liquid level detector Two pairs of regulating means, that is, the first stopper and the second stopper, which regulate a rotary angle range of the magnet holder when the first stopper and the second stopper come into contact with the stopper of the arm integrally fixed to the magnet hold... | 05/27/2008 |
| 7331225 | Non-contact type liquid level sensor A non-contact type liquid level sensor according to the invention has an electromagnetic shield plate mounted on a housing for blocking effects from an external magnetic field onto a magnetoelectric converting element. ... | 02/19/2008 |
| 7315165 | Sensor element A sensor element (30) measures a Hall voltage generated by a movable magnet (16). For this purpose, the sensor element (30) comprises a ceramic base element (40) which has connected therewith a detector element (46). The detector e... | 01/01/2008 |
| 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 |
| 7240550 | Method and apparatus for material indentification by means of gravitational field analysis Described is a sensor for filling level measurement using a gravitational field analysis, comprising a first and a second gravimeter unit. The measurement is effected in a contactless manner, via the container wall and without input of energy into the filling good. ... | 07/10/2007 |
| 7239129 | Sensor based on the travel time principle with a detector unit for mechanically elastic waves A position sensor based on the travel time principle of a mechanically elastic wave length having a wave guide, an electrical hollow return conductor, a detector coil attached to the wave guide and a position element which is movable along the wave guide which gener... | 07/03/2007 |
| 7231821 | Vertical liquid level measuring device A system for actuating an indicator in response to a depth change in a liquid that is confined to a container comprises a housing, a float constrained to vertical movement in response to changes in liquid depth in the container, a drive rod arranged to rotate in res... | 06/19/2007 |
| 7222529 | Filling level sensor for a fuel tank of a motor vehicle The invention relates to a filling level sensor for a fuel tank with a float which is fastened to a lever arm and at least one contact which is arranged on the lever arm and is in connection with a slider track formed as a thick-film resistor. The thick-film resisto... | 05/29/2007 |
| 7218099 | Displacement sensor A plurality of Hall ICs 34A, 34B are disposed around a magnetic rod 32 that is movable along a central axis. The Hall ICs are disposed in different positions in terms of both a straight line distance coordinate in the direction of the central ax... | 05/15/2007 |
| 7216537 | Fiber optic flammable liquid measuring system An optical liquid measuring system for measuring the amount of flammable liquid in a storage tank consisting of a pair of encoder disks that are operatively connected to a pair of floats through a pair of pulley systems. The floats are designed so that the first flo... | 05/15/2007 |
| 7191648 | Level gauge for oil-filled transformer, choke, or tap changer An electric power apparatus has a oil-filled vessel in which a float is connected to a float shaft that rotates as the float rises and falls with the level of oil. A level indicator has a display shaft extending along and pivotal about an axis, and coupled to the fl... | 03/20/2007 |
| 7140258 | Magnetic-based force/torque sensor A force transducer element (20) comprises a body (22) of magnetisable material having at least one magnetised region (30) at an angle, say 45°, to the force-sensing direction (P—P). Preferably there are a plurality of parallel magnetised regi... | 11/28/2006 |
| 7111510 | Liquid level detection device A liquid level detecting apparatus having detachable terminals and capable of holding down the formation of silver sulfide is provided. The apparatus includes a movable contact displaced in accordance with the fluctuation of a liquid level, electrodes slidingly cont... | 09/26/2006 |
| 7067750 | Float switch and mounting system assembly A float switch assembly with a housing/clamping structure that is made from plastic and impervious to corrosion, with improvements over the prior art including a thumbscrew positioned between its two upper bracing protrusions and external braces/ribs that make it le... | 06/27/2006 |
| 7062966 | Fuel level sensor A small profile fuel level sensor has a small float located in a vertically-oriented housing in a fuel tank, and instead of sliding against two resistive strips that output a level signal as fuel level changes, the float is drawn to and rolls against the two strips ... | 06/20/2006 |
| 7062967 | Fuel level sensor An apparatus and method are provided for determining the fuel level in a fuel tank. The apparatus includes an acoustic transducer arranged to transmit an acoustic signal and receive a reflected signal. A float remains buoyant at the surface of the fuel in the tank a... | 06/20/2006 |
| 7036370 | Spring assembly with cantilevered spring rods A spring assembly and an apparatus incorporating the same. The spring assembly includes a base block configured to be rigidly fixed to a frame. A pair of nominally identical spring rods is cantilevered from the base block in a first direction. Each rod has a length,... | 05/02/2006 |
| 7021139 | Non-contact type liquid level sensor A non-contact type liquid level sensor includes a sensor housing; a rotary shaft, rotatably mounted on the sensor housing; a float, vertically movable with a change of a liquid level; a float arm, having a first end mounted on the float, and a second end coupled to ... | 04/04/2006 |
| 7021137 | Apparatus for rapidly measuring liquid levels and volume of groundwater within wells that eliminates cross contamination between wells A dedicated liquid level detection method having a sensor positioned into the casing of a groundwater well. The detector is in the form of an elongated thin film sensor tape that extends along the full length of the well casing which detects the level, thickness and... | 04/04/2006 |
| 7002481 | Monitoring system and method A monitoring system includes one or more monitoring devices, positioned in sewer manholes, storm drains, etc., and a remote monitoring station that communicates wirelessly therewith. The monitoring device may be an integrated unit, including sensors, a two-way telem... | 02/21/2006 |
| 6993968 | Liquid level sensing apparatus In a liquid level sensing apparatus, a rotating part is fixed with an arm. The arm is arranged to rotate in accordance with a liquid level. The rotating part is supported rotatably on a bearing portion of a housing. A magnet is housed in the rotating part. A magneto... | 02/07/2006 |
| 6992260 | Plastic pan float switch and mounting system assembly A float switch, housing, and clamping member assembly that is made from plastic and impervious to corrosion, with improvements over the prior art including a wide float switch body for enhanced water displacement that results in a more responsive operation, a housin... | 01/31/2006 |
| 6992757 | Method and system for encoding fluid level A level transmitter can generate a level measurement signal according to the position of a float that follows fluid level in a tank. The transmitter can comprise an optical encoder with a patterned disk that is linked to the float so that fluid level change produces... | 01/31/2006 |
| 6976394 | Level transmitter A level transmitter for liquid containers, particularly fuel store tanks, comprising a housing in which a contactless sensor is arranged which is connected with an evaluating unit and operatively connected with a magnet that moves relative to the sensor when a float... | 12/20/2005 |
| 6915690 | Fuel gauge A fuel gauge includes an arm moving with the level of fuel in a fuel tank, a detection body for movably supporting the arm and including a rotor moving together with the arm and a stator for movably supporting the rotor, and a magnetic-flux detecting element arrange... | 07/12/2005 |
| 6915692 | Level-sensor device for a liquid-fuel tank, particularly for a system for supplying LPG to an internal-combustion engine In a tank for liquid fuel, particularly a tank for LPG in a system for supply of LPG to the internal-combustion engine of a motor vehicle, the level-sensor device comprises a floating member guided so as to move in a substantially vertical direction within the tank ... | 07/12/2005 |
| 6901796 | Fluid level detecting device A fuel level sensor includes a float, a float arm, a float arm holder, and a sliding contact. The float arm holder is made of conductive resin. Therefore, the float arm and the sliding contact are electrically connected with each other via the float arm holder and m... | 06/07/2005 |
| 6880398 | Fuel level detection device for a fuel tank A fuel level detection device detects the level of fuel in the fuel tank. The fuel level detection device comprises a body including at least one mounting station and a fuel level detection unit. The fuel level detection unit includes a base and a float mounted rela... | 04/19/2005 |
| 6871541 | Level meter A level meter for motor vehicle fuel tanks comprises a float element. With the float element, a lever is connected that is adapted to be pivoted about a pivot axis. Further, the level meter comprises a position sensor as well as a position transmitter connected with... | 03/29/2005 |
| 6868724 | Sealed fuel level sensor A fuel level sensor that includes a housing having a cavity formed therein, and a resistor element disposed within the cavity for creating a signal that may be utilized to indicate a liquid fuel level within a fuel tank. A float lever is associated with the housing ... | 03/22/2005 |
| 6857314 | System for detecting remaining amount of liquid in tank A liquid remaining-amount detecting system includes a displacement transmitting part for transmitting displacement of a float to a rotation-angle sensor and including a bracket mounted to the bottom of a tank, an arm having a base end mounted to the bracket and a fr... | 02/22/2005 |
| 6813946 | Liquid sensing Liquid sensing apparatuses and liquid sensing methods are described. In some embodiments, a liquid sensing apparatus includes a magnetic element; a source magnetic field, which produces on the magnetic element a magnetic force with a component that opposes a gravita... | 11/09/2004 |
| 6762679 | Remote monitoring adapter for levelmeter An adapter for a mechanical type levelmeter, which has a magnet that moves in response to a changing level of liquid in a container. The adapter is fitted onto the levelmeter in a manner that is transparent to any existing reading dials, but that permits hall sensor... | 07/13/2004 |
| 6732584 | Fuel level sensor with flexible circuit A fuel level sensor is provided having a flexible printed circuit cylinder, having a buoyant member mounted on a rod and a contact member mounted on the buoyant member which abuttingly contacts the rod and the conductive traces formed on the inside of the flexible c... | 05/11/2004 |
| 6711949 | Remote fluid level detection system A remote two-module electronic fluid monitoring system to be used as an agricultural aid in the application of a fluid to a field. A tank module sits atop a field tank and monitors internal fluid level. Fluid level detection is achieved by tracking the position of a... | 03/30/2004 |
| 6708562 | Level gauge for oil-filled transformers, chokes and tap changers A liquid level indicator for an oil-filled transformer, power choke or tap changer in which a sensor part has a float which rises and falls with the oil level and rotates a sensor shaft and the sensor shaft is coupled to an indicator shaft on which a pointer is prov... | 03/23/2004 |
| 6701784 | Carburetor fuel level management system A carburetor fuel level management system includes a fuel level sensor mounted in the float bowl of the carburetor for monitoring actual fuel level and providing a signal indicative of the fuel level. The sensor may be used for data acquisition and/or to ... | 03/09/2004 |
