Abstract: A discrete semiconductor transistor includes a gate resistor electrically coupled between a gate electrode terminal and a gate electrode of the discrete semiconductor transistor. A resistance R of the gate resistor at a temperature of ?40° C. is greater than at the temperature of 150° C.

Abstract: A tank device for storing a liquid medium for reducing pollutant levels in exhaust gases includes a container for storing the liquid medium, having a container wall, which is a first plastic at least in a first contact area. The tank device furthermore includes a support element, which is arranged in an aperture in the container wall and has an overmolding which is a second plastic at least in a second contact area. The second contact area is coupled to the first contact area of the container wall in a substantially liquid-tight manner.

Abstract: A testing apparatus for a motherboard design includes a plurality of electrical elements. The testing apparatus includes a body, a plurality of heat source modules, and a power source terminal. The plurality of heat source modules is positioned on the body and produce heat to simulate the electrical elements of the motherboard. The power source terminal is connected to the plurality of heat source modules via cables and connected to a power supply. When the power supply is turned on, the power supply provides working voltages to the heat source modules to signal the heating source modules to simulate the heat production of the electrical elements of the motherboard design.

Abstract: An electric fan assembly has a rotating fan blade mounted with an array of light emitting devices; a thermistor mounted on the fan blade and providing an analog signal corresponding to a sensed temperature, a fan blade position synchronizing switch and a microcontroller and display driver having an analog to digital converter. The microcontroller and display driver is connected to receive the signals from the thermistor and synchronizing switch and programmed to selectively power the light emitting devices when the fan blade is in a synchronized position to provide an alpha numeric display of the ambient temperature by a persistence-of-vision effect.

Abstract: A device and a system for measuring temperature in an inaccessible and/or movable mechanical part. The device comprises a temperature-sensitive clement which can be installed inside the movable part and which is designed to emit a signal containing information on the temperature of said clement, in such a way that this signal can be received by a control unit. The temperature-sensitive clement is a SAW chip which is arranged at the lower end of a hole in the mechanical part whose temperature is to be measured and it is connected to a first antenna provided outside said hole in said mechanical part.

Abstract: The present invention relates to a calibrator for contact and non-contact thermometers, comprising a metallic body which comprises two opposite end surfaces, wherein at least a first type of hole which is drilled into the metallic body for the insertion of a temperature control probe, and at least a second type of hole for the insertion of a temperature probe are mounted on one end surface; and the other end surface is coated with material to perform as radiative source; a heating device, for heating the metallic body, and temperature control device, for controlling the heating power of the heating device and for controlling the temperature of the metallic body. The present invention could be utilized to calibrate both contact and non-contact thermometers. The objective of integrating two functions into one device and thereby saving costs and space could be achieved.

Abstract: A food storage apparatus (22) comprises a container (26) to contain a food item (20), a humidity sensor (34) to sense a humidity within the container (26), and a transmitter (66) responsive to the humidity sensor (34) to transmit a signal based upon the humidity. A system for monitoring at least one food item within a storage place (24) comprises a receiver (88) to receive the signal, and an indicator (40) responsive to the receiver (88). Methods for monitoring at least one food item are also disclosed.

Abstract: A method for sealing a leak from the end of a thermowell pipe comprising the steps of providing a hollow fitting member having a first end and a second end. The second end having an annular tapered ridge extending therefrom and attaching the first end of the hollow fitting member to a pipe.

Abstract: A temperature transmitter in a process control loop comprises a temperature sensor and a transmitter circuit. The temperature sensor includes a sensor sheath and a sensor element positioned within the sensor sheath. At least one element lead is coupled to the sensor element and extends from the sensor sheath. A sheath lead is coupled to the sensor sheath and extends from the sensor sheath, wherein the element lead and the sheath lead provide signals to be measured. The transmitter circuit includes and A/D converter, a microprocessor and an input-output circuit. The A/D converter is coupled to receive the signals from the element lead and the sheath lead. The microprocessor is coupled to the A/D converter. The input-output circuit is coupled to the microprocessor for communication with the process control loop. The sheath lead allows the transmitter to monitor the sensor sheath's insulation resistance and generation of parasitic sheath-to-lead voltage.

Abstract: A device for indicating whether a rise in temperature above a predetermined value has occurred includes a support member, such as a label, on which a temperature-sensitive material is deposited. The material includes a large number of fracturable microcapsules containing a medium which changes from a solid state to a liquid state at the predetermined temperature value. The viscosity of the medium in its liquid state and the material of the support member are chosen such that the distance d.sub.1 by which the medium flows across the support member after the fracturing of the microcapsules so as to activate the device is indicative of the time between activation of the device and cooling of the device to below the predetermined temperature value. If the temperature is subsequently allowed to rise above the predetermined value, the medium will again assume its liquid state and will flow further across the support member, reaching a distance of, say, d.sub.

Abstract: High resolution absorption microscopy, spectroscopy and similar applications are implemented by providing for a measurement tip which is maintained spaced from a sample under investigation sufficiently close so as to equalize thermal levels in the tip and the sample; generally within about 10 Angstroms. Energy is applied to the sample being investigated and either a steady state or dynamic junction potential is measured. The junction potential is representative of local sample temperature. The close separation can be maintained by techniques employed in scanning tunneling microscopy, atomic force microscopy or capacitance microscopy. In the event the close separation is maintained using scanning tunneling microscopy techniques, then a switching arrangement is provided for connecting a conductive film (either of the sample or supported on a sample) to either a suitable potential or ground and simultaneously connecting the STM tip either in a feedback loop or to a device for measuring the junction potential.

Abstract: A planar thermal radiator for use in outer space is disclosed. The radiator is adapted to rotate on two mutually perpendicular x and y axes which are in x and y planes respectively that are perpendicular to each other and to the planar surfaces of the radiator. It utilizes a plurality of pairs of heat sensors wherein each heat sensor provides a value of electrical resistance which is representative of the incident heat energy along the sensitive axis of that heat sensor. A common heat sensor pair detects incident heat energy which is perpendicular to the radiator. A first plurality of heat sensor pairs is used to detect incident heat energy along sensitive axes that are parallel to the x-plane and a second plurality of heat sensor pairs is used to detect incident heat energy along sensitive axes that are parallel to the y-plane. One sensor of each heat sensor pair is mounted on the opposite surface of the radiator. Each heat sensor pair has an associated heat sensor pair in its respective plurality.

Abstract: A fire detector for detecting a fire occurrence, including a temperature sensor comprising a thermistor or, a platinum wire, a protective cover enclosing the temperature sensor and protecting the temperature sensor from external impacts, and a protector projecting from the front face of the sensor body and surrounding the temperature sensor.

Abstract: A process for determining a relative temperature distribution at a surface of a high temperature member to be used in a gas containing oxygen at high temperatures is disclosed. The process comprises the step of determining the relative surface temperature distribution of the member by measuring concentrations of oxygen at the surface of the member, which surface is composed of silicon carbide or silicon nitride. The process may also include the step of quantitatively determining a distribution of temperatures at the surface of the member by measuring concentrations of oxygen at the surface of the member, determining a relationship between temperatures and concentrations of oxygen on a surface of a standard member, and comparing the measured oxygen concentrations at the surface of the member with those of a standard member with reference to this relationship.

Abstract: A simple and inexpensive instrument for measuring electric current that may be mounted on existing current-carrying conductors to provide a ready visible indication of the current flowing through the conductor. The instrument comprises an outer transparent tube mounted coaxially with the current-carrying conductor, a number of O-rings mounted within the tube and spaced along the length of the tube to form different compartments along the instrument, and a number of differently colored tubular indicators respectively forming the inner walls for the compartments, with each compartment being filled with a material, such as paraffin wax, which melts at a different temperature from the material in the other compartments, to become transparent and reveal the corresponding colored inner indicator, when the current in the conductor heats the conductor to a particular temperature.

Abstract: A device for regulating or respectively limiting the temperature provided an electric heating element in cooking apparatus. At least one temperature sensor is provided for regulating or respectively limiting the temperature, the sensor having a rod of high thermal expansion which is disposed in a tube of low thermal expansion, the tube being held between holding elements. A support member adjoins each end of the tube and surrounds the rod. The holding elements are alongside each of the support members. The support member has a coefficient of thermal expansion .alpha..sub.1 which is smaller than a coefficient of thermal expansion .alpha..sub.2 of the adjoining holding element and larger than the coefficient of thermal expansion .alpha..sub.3 of the tube.

Abstract: A method for determining reactive acoustic power density level and its direction in a fluid using a single sensor is disclosed. In the preferred embodiment, an apparatus for conducting the method, which is termed a thermoacoustic couple, consists of a stack of thin, spaced apart polymeric plates, selected ones of which include multiple bimetallic thermocouple junctions positioned along opposite end edges thereof. The thermocouple junctions are connected in series in the nature of a thermopile, and are arranged so as to be responsive to small temperature differences between the opposite edges of the plates. The magnitude of the temperature difference, as represented by the magnitude of the electrical potential difference generated by the thermopile, is found to be directly related to the level of acoustic power density in the gas.

Abstract: A reusable metal clamp 10 for retaining a fused quartz ampoule 25 during temperature cycling in the range of 20.degree. C. to 1000.degree. C. A compressible graphite foil 27 having a high radial coefficient of thermal expansion is interposed between the fused quartz ampoule 25 and metal clamp 10 to maintain a snug fit between these components at all temperature levels in the cycle.