U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Quotables

"Everyone acquainted with the subject will recognize it as a conspicuous failure."

Henry Morton, president of the Stevens Institute of Technology ; Said in 1880 about the light bulb

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 374/181 - Reference junction compensation


Subclass of Class 374 - Thermal measuring and testing
Definition: Subject matter having a reference junction complementary
No. of patents: 85
Last issue date: 01/31/2012


1      
NumberTitleIssue Date
8104956Thermocouple measurement circuit
A thermocouple measuring circuit for sensing a temperature at a measuring point is provided. The thermocouple measurement circuit (12) includes a thermocouple input for sensing a temperature at a measuring point, a compensation circuit (14) for compens...
01/31/2012
7314309Ambient and perfusion normalized temperature detector
A body temperature detector is particularly suited to axillary temperature measurements of adults. The radiation sensor views a target surface area of the body and electronics compute an internal temperature of the body as a function of ambient temperature and sense...
01/01/2008
7287432Process transmitter with overpressure vent
An overpressure vent in a transmitter housing of a process transmitter. The transmitter is configured for coupling to an industrial process and measuring a process variable. The transmitter includes an enclosure having a cavity formed therein. A process coupling is ...
10/30/2007
7276697Infrared apparatus
Apparatus for protection against undesired thermal transfer comprising a printed circuit board (15), an infrared sensing device (100) electrically connected to the printed circuit board (15) by way of an electrical lead (12), and solid th...
10/02/2007
7259686Two wire temperature transmitter
A thermoelectric connector module (C) is disclosed which comprises input (2) and output (1E) connectors and contains signal conditioning circuitry (1C). The input connectors (2) are interfaced with a hand-held detector (7), and the...
08/21/2007
7256344Electrothermal device for ignition and flame detection in gas burners
A single thermoelectric device designed to operate both as an igniter and flame detector for gas burners is described. Ignition is performed via heating, by Joule effect, of a conductor which can have, preferably, catalytic activity on the combustion while the flame...
08/14/2007
7234864Measurement of multi-channel cold junction temperature
The cold junction temperature of the channels on a multi-channel terminal block are accurately determined for each terminal pair without affixing a thermistor to each terminal. One embodiment provides accurate cold junction measurement of a six channel device (12 te...
06/26/2007
7228186Field-mounted process device with programmable digital/analog interface
Embodiments of the present invention generally provide a field-mountable process device that receives digital information from one or more process devices, and provides an associated analog output. Embodiments of the present invention include providing a wireless in...
06/05/2007
7228508Fail-safe thermal sensor apparatus and method
A fail-safe thermal sensor is implemented in an integrated circuit such as a microprocessor. The fail-safe thermal sensor monitors the temperature of the integrated circuit and halt logic halts operation of the integrated circuit in response to the fail-safe thermal...
06/05/2007
7223014Remotely programmable integrated sensor transmitter
A remotely programmable integrated sensor transmitter device for measuring and reporting a physical quantity of a given medium comprises a sensor for measuring a physical quantity of a medium and providing an electrical output as a function of the property measured,...
05/29/2007
7190053Field device incorporating circuit card assembly as environmental and EMI/RFI shield
A field hardened industrial device is described with a housing of the device having electrically conductive walls surrounding a cavity with an open end. An electronics assembly is adapted to fit within the cavity. The device includes a circuit card assembly, which i...
03/13/2007
7144155Method, system and apparatus for measuring temperature with cold junction compensation
A cold junction compensation system for a temperature measurement device having a processing circuit is disclosed. The cold junction compensation system includes a cold junction temperature sensor arranged in signal communication with the processing circuit, a therm...
12/05/2006
7084342Semi-compensated pins for cold junction compensation
An apparatus and system is presented for partially compensating the cold junction of a thermocouple system using low cost semi-compensated conductors of system components accommodating various thermocouple types. The thermocouple system, comprises a thermocouple por...
08/01/2006
7074089Electrical connector with thermal sensor
A card connector system that detachably supports a PC card and electrically connects the PC card to an electrical device. The system includes a temperature sensor to monitor temperature of the PC card to prevent the deleterious effect of heat generated by the PC car...
07/11/2006
7044638Multi-element thermocouple
A multi-element thermocouple circuit includes at least two temperature measuring junctions. A first temperature measuring junction is formed by first and second thermoelements, each of the first and second thermoelements being formed of a noble metal or a noble meta...
05/16/2006
7029171Integrated digital temperature sensor
A digital integrated circuit temperature sensor including an analog-to-digital converter providing a binary word representative of a temperature internal to the integrated circuit, and a circuit for providing an analog voltage representative of the circuit temperatu...
04/18/2006
7016741Process control loop signal converter
A device for use in a process control system includes a first pair of electrical connections configured to couple to a two-wire process control loop. The loop includes a two-wire process variable transmitter. A second pair of electrical connections is configured to ...
03/21/2006
7011446Thermocouple junction box with isolated studs
A thermocouple junction box for reducing EMF generated by a stud-and-cup configuration comprises a cup adapted to be electrically connected to a thermocouple sensing junction and a stud disposed, at least in part, within the cup, the stud being electrically isolated...
03/14/2006
7005643Infrared sensor
An infrared sensor formed as a membrane on a substrate and detecting infrared rays by an infrared detector on that membrane, wherein even if an adhesive used for mounting the infrared sensor on a mounting surface creeps up to the membrane, it is made possible to pre...
02/28/2006
6997604Temperature sensor
A temperature sensor comprising: a housing; a thermo-sensitive element housed in the housing for outputting electric characteristics varying with a temperature, as an electric signal; and a pair of lead wires connected at their one-side ends with the thermo-sensitiv...
02/14/2006
6975047Temperature-based cooling device controller apparatus and method
A temperature-based cooling device controller is implemented in an integrated circuit such as a microprocessor. The temperature-based cooling device controller includes a register to store a threshold temperature value, a thermal sensor, and clock adjustment logic t...
12/13/2005
6961624Two-wire field-mounted process device
A two-wire field-mounted process device with multiple isolated channels includes a channel that can be an input channel or an output channel. The given input or output channel can couple to multiple sensors or actuators, respectively. The process device is wholly po...
11/01/2005
6948846Test apparatus for power circuits of an electrical distribution device
A glowing contact or high resistance test device includes a housing and first and second circuits substantially within the housing. The first and second circuits include first and second electrical plugs disposed from the housing and adapted to electrically engage a...
09/27/2005
6909093Infrared detecting element, method of manufacturing the same and temperature measuring device
To provide a thermopile infrared detecting element capable of accurate temperature measurement at low cost. An infrared detecting element 1 using a silicon nitride film as a first structure layer 22 constituting a structure of a membrane portion 4
06/21/2005
6888397Temperature sensor circuit, semiconductor integrated circuit, and method of adjusting the temperature sensor circuit
A temperature sensor circuit which includes: an adjustment circuit which generates a first divided voltage obtained by dividing a reference voltage; a current generation circuit which has a transistor element and generates a current corresponding to a gate voltage o...
05/03/2005
6565254Infrared sensing element and temperature measuring device
An infrared sensing element of the present invention includes a base including a thin film portion and a thick wall portion arranged around the thin film portion, and a thermopile including a plurality of thermocouples connected in series so that cold jun...
05/20/2003
6425687Cold junction compensation for multiple thermocouples
A system for measuring average temperature including a plurality of measurement thermocouples (10,12,14) connected in parallel to measurement apparatus (24) by two signal wires (22) of a material different to that of the measurement thermocouples (10,12,1...
07/30/2002
6293700Calibrated isothermal assembly for a thermocouple thermometer
A calibrated isothermal assembly for a thermocouple thermometer is provided to obviate a calibration step after manufacture of the instrument. A compact isothermal block is fabricated on a specialized printed circuit board which includes a thick metal pla...
09/25/2001
6203194Thermopile sensor for radiation thermometer or motion detector
The invention is directed to a thermopile sensor and in particular to a radiation thermometer or a motion detector with a thermopile sensor. The thermopile sensor includes a thermopile supported in a housing. The thermal capacity of the cold and hot junct...
03/20/2001
6158885Thermocouple-to-extension wire ambient temperature error correction device
The invention relates to a device for correcting error in temperature readings caused by thermocouple-to-extension wire ambient temperature fluctuations. The device creates an isothermal mass which raises the temperature of terminals to higher than ambien...
12/12/2000
6074089Thermoelectric product and method
A thermoelectric cold junction compensator connector module, for use with a thermoelectric device such as a thermistor, thermocouple, or resistance-temperature device, has within a housing a cold junction compensator circuit which has means for linearizat...
06/13/2000
6072165Thin film metal/metal oxide thermocouple
A thin film thermocouple having junctions (2, 7) of metal and semiconducting metal oxides such as tin oxide/silver, and used as surface temperature sensors in conjunction with thin film heating elements (1) to control temperature....
06/06/2000
5998767Apparatus for processing a substrate wafer and method for operating same
An apparatus for processing a substrate wafer wherein the apparatus includes a reaction chamber, a wafer holder intended to hold the substrate wafer, and a susceptor. A temperature sensor, preferably a thermocouple with two junctions, is provided for meas...
12/07/1999
5887978Self-verifying temperature sensor
A self-verifying temperature sensor and method for measuring and verifying the true thermodynamic temperature of a system. The sensor is constructed of various combinations of the following temperature-dependent elements: thermoelements, resistive element...
03/30/1999
5803604Thermocouple transmitter
A loop transmitter is connected between a thermocouple and a loop detector circuit. The transmitter has a circuit mounted on an elongated circuit board within a cylindrical housing with thermocouple leads and output leads extending from opposite ends of t...
09/08/1998
5713668Self-verifying temperature sensor
A self-verifying temperature sensor and method for measuring and verifying the true thermodynamic temperature of a system. The sensor is constructed of various combinations of the following temperature-dependent elements: thermoelements, resistive element...
02/03/1998
5484206Method and apparatus for sensing a cold junction temperature
An improved method and apparatus for sensing a cold junction temperature, wherein two sensors are located near the cold junction temperature, the temperatures at the two sensors are measured, the heat flow between the two sensors and one of the two sensor...
01/16/1996
5246293Reference junction for thermocouple measuring
The invention relates to a reference junction for thermocouple measuring, comprising two reference temperature blocks (5) connected with one another heat conductively but dielectrically, one block for each thermocouple conductor and each block provided wi...
09/21/1993
5167519Temperature compensating universal connector
A universal connector including a housing of molded thermoplastic having a pair of slots in a side thereof for receiving therein plugs or wires of various shapes and sizes for connection with the connector and a slot for receiving therethrough a stud. A p...
12/01/1992
5163755Temperature regulator
A temperature regulator is provided which includes a temperature sensor, a temperature regulating unit, a cold junction temperature measuring device and a double-wall insulating partition. Temperatures measured by the temperature sensor are compensated wi...
11/17/1992
1      
 
Sign InRegister
Username  
Password   
forgot password?