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| Number | Title | Issue Date |
| 7254008 | Integrated capacitive microfluidic sensors method and apparatus A microfluidic device and method for capacitive sensing. The device includes a fluid channel including an inlet at a first end and an outlet at a second end, a cavity region coupled to the fluid channel, and a polymer based membrane coupled between the fluid channel... | 08/07/2007 |
| 7088567 | Tunable capacitors using fluid dielectrics Capacitors (10,20,40,50,70,80) having a fluid dielectric material that is transported or undergoes a phase change are disclosed. The dielectric medium change results in a change in the total dielectric constant of the material between the electrodes (12, 1... | 08/08/2006 |
| 5995370 | Heat-sinking arrangement for circuit elements An effective heat-sinking arrangement is realized for circuit elements used in a portable type information terminal having a small restricted space therein. Wherein, a first substrate has a cavity formed in its insulating layer extending to an earthing la... | 11/30/1999 |
| 5852368 | Sensor for the measurement of moisture in a flow of material A sensor for the measurement of moisture in a flow of material, especially loose material such as meal material, grains, granulates and similar materials which are to be pressed to form feed pills in presses. The sensor comprises a tube piece of an electr... | 12/22/1998 |
| 5747992 | Materials characterization cell for polarization spectrum and streaming electrification measurements A materials characterization test cell is disclosed. The test cell includes a housing including spacers for supporting sample insulation materials, and a channel disposed in the housing to permit the passage of oil through the housing. A pair of electrode... | 05/05/1998 |
| 5170670 | Three axis velocity probe system A three-axis velocity probe system for determining three-axis positional velocities of small particles in fluidized bed systems and similar applications. This system has a sensor head containing four closely-spaced sensing electrodes of small wires that h... | 12/15/1992 |
| 5151660 | Ceramic capacitance high pressure fluid sensor A ceramic bodied sensor having helical metallized electrodes for measuring the capacitance of an oil-water-gas or oil-water mixture flowing through a central bore of the sensor is disclosed. The sensor generally is a hollow cylinder with an inner ceramic ... | 09/29/1992 |
| 4896098 | Turbulent shear force microsensor A microbridge is used for the accurate measuring of time varying shear forces in the presence of fluctuating pressure. A microdimensioned plate is suspended by arms to form a microbridge. The microdimensions enable the smallest turbulence scales of intere... | 01/23/1990 |
| 4732543 | Liquid sensor systems for liquid-employing apparatus and sensors for use in such systems A liquid sensor system particularly suitable for commercial washing machines for drinking glasses and soft drink dispensers employs a capacitive detector providing a tortuous path through which the liquid passes and constituting part of the dielectric of ... | 03/22/1988 |
| 4599907 | Mass-flow sensing transducer A variable capacitance device generally intended for use in measuring the mass flow of air while passing through an engine-manifold. The device is capable of responding to the impingement of a stream of air on its flexible capacitor plate located within a... | 07/15/1986 |
| 4484479 | Gas flow metering Gas flow metering using a capacitance measurement and comprising a taut elastomeric membrane, preferably tubular in form, which expands or contracts as a function of flow rate past it to an extent determined by Bernouilli's principle. The thus changing di... | 11/27/1984 |
| 4389900 | Capacitance probe sensor device A capacitance probe sensor device is disclosed which has a probe formed of KYNAR insulated wire spaced from an uninsulated metallic ground electrode. An oscillator and associated capacitance-resistance network connected to the probe serve to provide a lin... | 06/28/1983 |
| 4354219 | Capacitance sensing device A capacitance sensing device for detecting the amount of material flowing through a passage includes layers of disk-shaped insulating substrates having electrode films formed on surfaces thereof facing each other, and the insulating substrates are support... | 10/12/1982 |
| 4075680 | Capacitance densitometer for flow regime identification This invention relates to a capacitance densitometer for determining the flow regime of a two-phase flow system. A two-element capacitance densitometer is used in conjunction with a conventional single-beam gamma densitometer to unambiguously identify the... | 02/21/1978 |
| 4003259 | Method and a device for capacitive level measurement Capacitive level measurement apparatus comprising two sets of interdigitated capacitive elements arranged along the vertical direction for immersion in a liquid or the like, and a switch arrangement with external connections which provide sequential measu... | 01/18/1977 |
| 3962921 | Compensated pressure transducer A pair of diaphragms with substantially equal natural frequencies are superposed for movement in phase and in unison under accelerating forces, with electrical capacitor plates deposited on adjacent surfaces which provide an electrical measure of the diff... | 06/15/1976 |
| 3939360 | Liquid level sensor and electrode assembly therefor A system for detecting the fluid level in an intravenous bottle wherein a disposable electrode assembly, consisting of a piece of tape having upper, middle and lower electrode strips, is adhered to the bottle and connected to sensing equipment. The upper ... | 02/17/1976 |
