Class 73/735 - Electromagnetic

Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein the deflection of the tubular pressure
No. of patents: 24
Last issue date: 07/29/2008

Number	Title	Issue Date
7404331	Sensor assembly, transformers and methods of manufacture A sensor assembly is provided. The sensor assembly includes a sensor configured to measure an impedance value representative of a sensed parameter and a transformer coupled to the sensor. The transformer includes at least one ceramic substrate and at least one elect...	07/29/2008
7337675	Method for measuring average velocity pressure and system thereof A method for measuring average velocity pressure of a stack comprises the following steps. First, a total pressure measuring device is provided. The total pressure measuring device then measures the total pressure at a first location in the stack. Next, physical par...	03/04/2008
7281490	Gauge having a magnetically driven pointer rotation device A gauge for indicating a measured variable such as pressure. The gauge includes a motion detection device including a drive magnet that is adapted to be moveable in response to changes in the variable. The pointer rotation device includes a pivot member, a power mag...	10/16/2007
7225680	Differential pressure gauge for filter An apparatus for measuring the differential pressure of fluid in filter. The apparatus comprises a housing defining a pressure chamber. A differential pressure gauge divides the pressure chamber into first and second fluid chambers. The differential pressure gauge i...	06/05/2007
7140257	Wireless transmitting pressure measurement device A pressure measurement device includes a housing having an inlet, a transducer coupled to the inlet to generate an electrical signal representative of pressure at the inlet, and a data communication device coupled to the transducer to transmit a wireless signal corr...	11/28/2006
7012535	Battery operated warning sensor An alarm device for signaling when an object reaches a specified condition. The alarm device includes a sensor for detecting the condition of the object. The device further includes a switch element which is closed when the sensor indicates the specified condition. ...	03/14/2006
7002147	Highly sensitive vacuum ion pump current measurement system A vacuum system comprising: 1) an ion pump; 2) power supply; 3) a high voltage DC—DC converter drawing power from the power supply and powering the vacuum pump; 4) a feedback network comprising an ammeter circuit including an operational amplifier and a series of ...	02/21/2006
6981421	Pressure gage and switch A pressure gage adapted to provide a mechanical indication of a sensed pressure and to provide an electrical signal indicative of the sensed pressure. The pressure gage includes a housing having a first fluid pressure chamber, a second fluid pressure chamber, and fl...	01/03/2006
6964199	Methods and compositions for enhanced protein expression and/or growth of cultured cells using co-transcription of a Bcl2 encoding nucleic acid The present invention in the field of biotechnology, provides methods and compositions for providing enhanced growth of, and/or protein production from, cultured mammalian host cells used for the production of commercially useful amounts of expressed proteins, by th...	11/15/2005
6910382	Sensors based on giant planar hall effect in dilute magnetic semiconductors Ferromagnetic semiconductor-based sensor devices, including sensors for detecting pressure changes and sensors for detecting magnetic fields, such as switching events in a magnetic recording medium. The pressure sensors of the present invention detect pressure chang...	06/28/2005
6742396	Method for upgrading a dial indicator to provide remote indication capability A dial indicator, method, and kit for upgrading a dial indicator to provide both local visible and remote indication of a measured physical parameter is provided. A magnetic rotary pointer is provided by coupling a magnet to a pointer, or by providing a replacement ...	06/01/2004
6668657	Pressure sensor A pressure sensor for a motor vehicle includes a sensor housing and a base. A pressure bore through the base leads to a pressure space delimited on one side by the base and on the opposite side by a diaphragm connected sealingly to the base. An actuating ...	12/30/2003
6626045	Pressure measurement device A pressure measurement device comprising a housing enclosing an elastic pressure measurement element and a magnet attached to the measurement element. First and second Hall sensors operatively positioned near the magnet are connected to an electrical circ...	09/30/2003
5700956	Signal generating pressure gauge A signal generating pressure gauge includes a pressure indicating unit having a housing provided with an inlet, a pressure-value indicating panel, a pressure converting unit fluidly communicated with the inlet and provided with a rotary shaft which rotate...	12/23/1997
5142913	Non-quartz resonating transducer A transducer for measuring a moment force as a related function of pressure and tension where a spirally wound bourdon tube has a confined end arrayed to apply a moment force to pretensioned metal vibratory elements. The change in tension in the pretensio...	09/01/1992
4870536	Micro displacement force transducer A sensor system utilizing a Bourdon tube to generate a force as a function of pressure to deflect a diaphragm in a capacitor device where the diaphragm varies capacitance values of the capacitor device as a function of the applied force. The capacitor dev...	09/26/1989
4777827	Digital pressure gauge Apparatus is disclosed in which a digital display is driven by an electronic output generated in response to field changes which occur when a transformer interacts with a magnetic core driven in a linearized path by a curved Bourbon tube in response to ap...	10/18/1988
4745811	Pressure monitoring apparatus having a Hall-effect detector A pressure responsive apparatus having a Hall-effect detector is described. The apparatus preferably includes a pressure gauge having a Bourdon tube responsive to an external pressure. The Bourdon tube has mounted thereto a pair of magnets supported on, o...	05/24/1988
4738141	Pressure sensor An improved pressure sensor includes a Bourdon tube, as its sensing element, and an indicator controlled thereby. At least one tightly closed container is secured to a free end of the Bourdon tube and is partly filled with a bulk material. If the Bourdon ...	04/19/1988
4720676	Magnetomechanical transducer utilizing resonant frequency shifts to measure pressure in response to displacement of a pressure sensitive device A target adapted for use in a magnetomechanical transducer system is activated by an ac magnetic field and a variable dc bias field to produce a resonant frequency which corresponds to the effective strength of the dc bias field. The target includes an el...	01/19/1988
4667514	Parameter sensors and monitors Parameter sensors and monitors are described incorporating one of a variety of parameter responsive structures constructed and arranged for expansion and contraction causing a component of motion and displacement along at least one direction in response t...	05/26/1987
4531416	Pressure transducer A linear variable differential transformer pressure transducer includes a pressure sensing element which is deformed in response to changes in the pressure of a fluid. The pressure sensing element is connected to the core of a differential transformer, th...	07/30/1985
4020696	High pressure, high temperature transducer The pressure measurement system utilizes two bourdon tubes with an active side connected to a test specimen and a reference side connected to an outside source. The tubes are attached to a single extensometer measuring relative displacement. The active si...	05/03/1977
4012959	Pressure gauge and flow meter Devices relying on the Inverse Wiedman Effect. Devices include a current conductive, magnetically anisotropic rod, through which an AC current flows. Wound about the rod is a conductive coil having output terminals. By varying the AC current, the anisotro...	03/22/1977

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Class 73/735 - Electromagnetic