Class 324/697 - For interface

Subclass of Class 324 - Electricity: measuring and testing
Definition: Subject matter including means to evaluate the point or
No. of patents: 35
Last issue date: 07/29/2008

Number	Title	Issue Date
7405578	Device for monitoring the contact integrity of a joint The invention relates to a device that can be used to monitor the contact integrity of a joint that is of an impervious contact surface between two parts (4 and 5) including a set of conductive patterns (8) which are distributed over the two con...	07/29/2008
7367231	Flexible guided wave level meter probe The invention is a level meter having a flexible probe. The flexible probe includes a flexible conductor and at least one flexible band shield member disposed in a substantially vertically parallel relationship with the conductor, where the conductor and the shield ...	05/06/2008
7222528	Fluid level sensor A fluid sensor arrangement (20) includes a sleeve (32) that is adapted to be placed within a container (24). A plurality of conductors (46, 48) and a channel member (50) within the sleeve cooperate to provide a measurement of condu...	05/29/2007
7215529	Capacitive sensor having flexible polymeric conductors A capacitive sensor having a first and a second polymeric conductor are embedded within a non conducting body, wherein the body maintains a fixed separation distance between the first and the second polymeric conductor. The body can include a non conducting web, whe...	05/08/2007
7162957	Redundant signal transmission system and development method Percussive signal transmission tubes, of contrasting color, are joined along adjacent longitudinally extending portions by an adhesive bead of polymeric material. The tubes can be separated in the field and are provided on spools without any sheath. A small diameter...	01/16/2007
7132133	Process for the manufacturing of the polymer compensation layer for LCD optical light shutter and the construction thereof This invention solves the technical problem of compensating for the angular dependence of the contrast in optical devices comprising liquid crystal displays (LC optical light shutters, which operate on the principle of electrically controlled optical birefringence),...	11/07/2006
7086335	Redundant signal transmission system and deployment means Percussive signal transmission tubes, of contrasting color, are joined along adjacent longitudinally extending portions by an adhesive bead of polymeric material. The tubes can be separated in the field and are provided on spools without any sheath. A small diameter...	08/08/2006
6853199	Interface detector A separating drum 1 is provided with a device for determining the position, the composition and the nature of several layers of fluid settling upstream from barrier 8. The device comprises a first rod 12 provided with microwave beam emitters ...	02/08/2005
6452500	Hydrocarbon sensing apparatus An apparatus for monitoring presence of hydrocarbon-based fluid is disclosed. It includes a body and a sensing cable mounted on the body in a wave-like shape, thus forming a plurality of sensing sections for detecting a layer of hydrocarbon on water. When...	09/17/2002
6277438	Protective fullerene (C60) packaging system for microelectromechanical systems applications The invention involves a method for locating the probe of a scanning tunneling micrograph a predetermined distance from its conducting surface, and specifically the deposition of a monolayer of fullerene C60 onto the conducting plate. The Fulle...	08/21/2001
6240778	Liquid level point switch sensor A liquid level sensor for detecting when an upper level of a liquid in a reservoir has reached a predetermined or critical point in the reservoir. The sensor includes a first input plate and a second input plate disposed concentrically relative to the fir...	06/05/2001
5661405	Elongate sensor having polymeric electrodes filled with conductive particles and having braided sleeves An elongate, flexible sensor for sensing an electrically conductive liquid, such as water, has two flexible electrodes extending along the sensor and two flexible sleeves extending therealong and being attached adhesively to each other along the sensor. E...	08/26/1997
5648727	Capacitive level sensing pipette probe A capacitive fluid level sensing pipette probe adapted to be used in an automated random access immunoassay analyzer is provided. The pipette probe comprises an elongated shaft having a conductive tip. An integrated circuit chip containing capacitive sens...	07/15/1997
5542289	Apparatus and method for the study of liquid-liquid interfacial rheology The apparatus and method of the present invention relate to a novel procedure for measuring the interfacial thinning that occurs during a droplet-liquid phase coalescence event. As an example, an aqueous drop is grown at the tip of a capillary submerged i...	08/06/1996
5444383	Device, system and method for measuring an interface between two fluids For measuring an interface between two fluids, a device (10, 75, 90) having n electrical circuit comprising transmitting means, a detector, a first antenna (14, 18, 78, 82, 92) and a second electrically grounded antenna (15, 18, 79, 83, 93), the transmitti...	08/22/1995
5444384	Method and device of contactless measurement of electric voltages in a unit under measurement with an insulating surface A method and device for contactless measurement of electric voltages in a unit under measurement with an insulating surface, a primary electron beam being directed onto the insulating surface of the unit. The energy of the secondary electrons in a seconda...	08/22/1995
5245292	Method and apparatus for sensing a fluid handling Method and apparatus for sensing fluid interface(s) in a complex fluid such as centrifuged blood, includes a sensing assembly with a microwave source and a microwave sensor positioned in spaced opposed relation, the microwave source and sensor defining a ...	09/14/1993
5077527	Encoding system and method for differential capacitive transducer A transducer system and method of use thereof by sequentially operating a comparator to produce a series of pulses in which the time distribution of the pulses is representative of the transducer value, and is used to normalize the sensed value in the eve...	12/31/1991
5075631	Encoding system and method for differential capacitive transducer A transducer system and method of use thereof by sequentially operating a comparator to produce a series of pulses in which the time distribution of the pulses is representative of the transducer value, and is used to normalize the sensed value in the eve...	12/24/1991
5032794	Method and apparatus for monitoring changes in underwater sediment levels Changes in underwater sediment level in a marine environment are monitored electronically using a probe embedded in the sediment. The probe includes an electrical current source to generate an electric field extending across the sediment interface. Voltag...	07/16/1991
4962041	Method and apparatus for automatic processing and analyzing of blood serum A method and apparatus for processing and analyzing blood serum includes a capacitive sensing unit for receiving centrifuged test tubes and generating output signals indicative of the boundary position between the separator gel and the blood serum in the ...	10/09/1990
4918374	Method and apparatus for inspecting integrated circuit probe cards A method and apparatus for inspecting integrated circuit probe cards in which the probe points of the probe card are scanned across a checkplate having a conductivity transition border. The impedances between the probe points and the checkplate as they cr...	04/17/1990
4885529	Identification of fluids and an interface between fluids by measuring complex impedance Complex impedance measured over a predefined frequency range is used to determine the identity of different oils in a column. The location of an interface between the oils is determined from the percent frequency effects of the complex impedance measured ...	12/05/1989
4833918	Sensor and method for ullage level and flow detection A device is provided for detecting the ullage level and flow in a vessel by detecting the presence of a solid or liquid material in proximity to a microwave detector. The device may be mounted to the side of the vessel or suspended inside the vessel so as...	05/30/1989
4796017	Low water level alarm for Christmas tree stand A resistive water probe is used in combination with a Christmas tree stand to detect a low water level. A low water situation activates lights in a Christmas tree ornament....	01/03/1989
4780705	Overfill sensing system An overfill sensing system uses a capacitive sensor (12) on the interior of a tank for sensing the presence of a liquid to cease the filling process. The capacitive sensor (12) includes a sensing capacitor (16) and a reference capacitor (18) on separate a...	10/25/1988
4780663	Gauge for measuring the conductance of a liquid present between two electrodes A liquid level gauge consists of two main cells comprising a measuring electrode, a compensation electrode and their respective counter electrodes. Circuitry is provided to determine the conductance of the liquid in each cell. Further circuitry is provide...	10/25/1988
4695789	Probe devices A probe device comprises a two-channel capacitive measuring sensor together with two further single-channel capacitive measuring sensors so disposed that the tips of the sensors are disposed in a common horizontal plane, the sensors being operable to dete...	09/22/1987
4558714	Resin interface detection system An improved method and system that utilizes conductance values of cationic and anionic exchange resins classified as layers of a mixed resin bed to automatically detect interfaces between the layers is disclosed. The arrangement includes electrical circui...	12/17/1985
4553087	Method and apparatus for determining the penetration and leaching process of conductive phases Method for one-time or continuous nondestructive determination of the penetration and leaching process of conductive phases in materials, wherein the conductivity of the material to be examined is measured in thin superposed layers in that, after applying...	11/12/1985
4487836	Method and apparatus for detecting boundary surface between blood plasma and blood corpuscle suspension A method and an apparatus for detecting a boundary surface between a blood plasma and a blood corpuscle suspension obtained after centrifuging are disclosed. An impedance across a pair of electrodes is measured by applying an A.C. voltage across the elect...	12/11/1984
4286208	Fluid interface detector A fluid interface detector includes a circuit for detecting the presence of one of two fluids to establish an interface level between the two fluids. The detection circuit produces an output signal having a variable pulse width determined by which of the ...	08/25/1981
4006063	Method for measuring surface characteristics of metals and metalloids A process applicable to metal and metalloid surfaces for detecting and determining the boundaries of stressed areas and areas exhibiting chemical variations involves ascertaining at a number of points on a surface the electrical potential generated betwee...	02/01/1977
4002996	Level detector using oscillator circuit with two capacitive probes This invention relates to a device for detecting a fall of level of flowable material in a closed container by emitting an oscillation. It is electronic in nature and the circuit has an amplifier with a feed-back terminal that is connected to a feed-back ...	01/11/1977
3995212	Apparatus and method for sensing a liquid with a single wire transmission line A method and apparatus for measuring the level and dielectric constant of a liquid which includes a device for generating a subnanosecond baseband pulse that propagates through a transition device to a single wire transmission line that extends through an...	11/30/1976

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Class 324/697 - For interface