Abstract: A folded, highly pure platinum, thick film, path on a ceramic cylindrical substrate provides a high TCR of about 3850 ppm/.degree. C. The path is applied by screen printing a thick film paste onto a substrate and then firing the paste at a time and temperature sufficient to bond the path to the substrate and to produce a TCR of at least about 3850 ppm/.degree. C. The paste is comprised of about 20% by weight of an organic carrier into which 80% by weight of particles have been mixed. The particles are 96% by weight platinum particles of less than about ten microns size and 4% by weight of a contaminant-free vitreous glass frit of less than ten microns size.

Abstract: An enameled steel cone is the support for a heat sensitive resistor element. The resistive element is arranged upon the enameled base of the cone and with a layer of enamel. A hollow shaft extends from the apex of the cone. Wires connected to the resistive element are fed through the body of the cone and through the hollow shaft. The assembly may be enameled in place or otherwise secured to a prepared structure such as a enameled steel vessel or member.

Abstract: An electric circuit member in a housing has lead wires which protrude out an end of the housing. A portion of the housing is provided with external threading for mounting and dismounting of the whole assembly. In order to prevent twisting of the wires as assembly is mounted and dismounted, the assembly may be manipulated to let the electric circuit member and its lead wires slip relative to the threaded housing portion. Three variations are shown.

Abstract: A temperature detecting device comprising a protective tube means having a flat inner bottom surface and a top opening end with a resilient metallic member positioned inside the tube for holding a thermistor. The resilient metallic member has a bottom surface essentially parallel to the bottom surface of the protective tube means which is in substantial surface contact with that bottom surface. The metallic member further has a remaining portion essentially perpendicular to the bottom portion and slightly longer than the distance between the bottom surface and the top opening of the tube means. A thin layer of metal, softer than the metal from which the member is made, is positioned between the bottom portion member and the bottom surface of the tube. The thermistor is mounted on the remaining portion of the member.

Abstract: A fast response fluid temperature sensor is disclosed which consists of a silicon temperature sensing semiconductor chip mounted on an extremely thin fin having a high surface area to mass ratio. The fin and chip combination are mounted in a frame assembly, with the thermal conductivity of the frame assembly being high and the specific heat being low for maximum heat transfer from the fluid being sensed to the silicon chip. The chip and fin assembly are illustrated as being open to the free flow of fluid around the assembly, no insulating material being provided between the fluid media being sensed and the fin and chip assembly, and a protective cage is formed around the fin and chip assembly. Suitable connection is made between one electrical terminal of the chip and the fin and between the other electrical terminal of the chip and the external circuitry, with various modified forms of such connections being illustrated.

Abstract: A fast response fluid temperature sensor is disclosed which consists of a silicon temperature sensing semiconductor chip mounted on an extremely thin fin having a high surface area to mass ratio. The fin being formed in the shape of a dome to fully enclosed the semiconductor chip and protect the connections thereto from contaminants, mechanical damage and corrosive materials. The fin and chip combination are mounted in a frame assembly, the thermal conductivity of the frame assembly being low and the specific heat thereof being low. Foamed material may be inserted in the dome to further protect the chip and lead thereto from damage.

Abstract: A high temperature sensor in which a mixture of a metal fluoride composition and magnesium oxide is filled with pressure into a cylindrical case forming one electrical terminal for supporting a conductive rod forming the other electrical terminal, the high temperature sensor being prevented from malfunction of the sensor due to any vibration and having a high response speed for temperature detection to a change of temperature of the atmosphere.

Abstract: An electrical temperature sensing device for food heating appliances such as toasters and the like which is constructed to provide rapid thermal response, significant resistance variation as a function of temperature, and good mechanical strength so as to be suitable for mounting within the food heating compartment of said appliances in close thermal coupling with the bread or other food article to be heated. The temperature sensing device is in the form of an elongated tubular structure shaped in a U configuration, comprising a central core of low mass insulating material upon which is wound a helical wire of temperature sensitive resistance material. A thin walled sleeve of insulating material fits tightly over the wire wound core, and a thin walled metal tubing of good heat conduction characteristics fits tightly over the insulating sleeve.

Abstract: A fast response fluid temperature sensor is disclosed which consists of a silicon temperature sensing semiconductor chip mounted on an extremely thin fin having a high surface area to mass ratio. The fin and chip combination are mounted in a frame assembly, with the thermal conductivity of the frame assembly being high and the specific heat being low for maximum heat transfer from the fluid being sensed to the silicon chip. The chip and fin assembly are illustrated as being open to the free flow of fluid around the assembly, no insulating material is provided between the fluid media being sensed and the fin and chip assembly, and a protective cage is formed around the fin and chip assembly. Suitable connection is made between one electrical terminal of the chip and the fin and between the other electrical terminal of the chip and the external circuitry, with various modified forms of such connections being illustrated.

Abstract: There is provided a means for measuring resistance for a resistance thermometer consisting of an insulating former as a carrier and a thin platinum layer as resistance material, the carrier for the platinum layer being made of a material having a greater thermal coefficient of expansion than platinum over the range between 0.degree. and 1000.degree. C.

Abstract: A temperature measuring probe utilizing an RTD element and an improved mode of assembling the element in a reliable manner which is proof against shock and vibration. Specifically, the invention has its most important applications in connection with miniaturized RTD's.

Abstract: The resistance temperature detector (RTD) includes a substrate of refractory dielectric material having two or more holes bored through it. A plug of electrically conductive material is fixed within each hole in proximity to one end surface of the substrate, with the plug surface preferably having a concave meniscus shape and consisting of a metal alloy such as Ti-Ni. Lead wires, such as Ni wires, are located in the holes and are connected to the plugs through the other end surface. A film of temperature dependent resistance material is deposited on the one end surface of the substrate and is connected to the two plugs. The film may consist of a thin sensing film of metal such as platinum or of a semiconductor material, deposited in a selected pattern on the substrate and in direct contact with the plugs, or the sensing film may be deposited so as to connect pads of electrical conducting material which are deposited to cover at least a portion of the plugs.

Abstract: A device for detecting both low level and excessively high temperature of oil in an internal combustion engine or other oil container. The device consists of a semiconductive material which exhibits a peak electrical resistivity at a predetermined temperature. The semiconductive material is mounted on the interior bottom surface at the closed end of a metal cup which is suitably mounted and immersed in the fluid whose level and temperature are to be monitored. The semiconductive material is connected in series with a power supply and indicator light. If, at any point over a broad range of temperatures, such as -50.degree. F to +300.degree. F, the level of the liquid drops such that it does not contact the cup sufficiently the normal current flowing in the circuit will heat the semiconductive material past its peak resistivity thereby driving the current in the circuit past the level required to light the bulb and indicate a problem (herein a problem of low level).

Abstract: A drawer type electrode of a thermistor for sensing high temperatures, wherein a shaft and a sheath are connected to a thermistor, is constructed such that the shaft and the sheath are brought into contact with the positive and negative electrode surfaces of the thermistor through precious metal chips so that electrical connection between the precious metals, the shaft and the sheath will not be impaired in any way even if oxidation penetrates into the interior from the shaft and the sheath surface due to high temperature.

Abstract: To detect and record the highest operating temperature range which occurs in an engine, transmission, implement hydraulic system or the like during an extended period of time, an indicator device is adapted to be mounted in thermal contact with a liquid coolant flow, lubricant flow or the like of the apparatus. The device has a housing containing a plurality of electrical resistor segments connected in series between an external electrode and the housing. A plurality of temperature-sensitive switches are arranged to short out successive ones of the resistor segments upon the occurrence of successively higher predetermined temperatures.

Abstract: A substrate carrier of electrically non-conductive material has a strip of resistance platinum applied thereto; in order to avoid the use of an intermediate temperature coefficient of expansion matching layer, the substrate carrier, for example of aluminum oxide, beryllium oxide, or a magnesium silicate, has less than thirty parts per million (ppm) Fe, less than 15 ppm Cr, less than 45 ppm Pb and less than 70 ppm Si in a form capable of reacting with platinum, the sum of the impurities by these metals, if all, or more than one are present, not exceeding 20 ppm; the average thermal coefficient of expansion of the substrate does not deviate from the mean thermal coefficient of expansion of the thermometer grade platinum by more than .+-. 30%; the platinum layer has a thickness of from 0.1 to 10 .mu.m, and is applied at a temperature in the range of between about 1000.degree. C to 1400.degree. C during 60 minutes in an atmosphere containing oxygen, for example free air.

Abstract: The invention is a temperature sensing wire resistance probe including a temperature responsive resistance element assembled in a novel method and having insulation adequate for direct connection in the line voltage circuit of an oven temperature control.

Abstract: A hot wire anemometer probe that includes a ceramic body supporting two conductive rods therein in parallel spaced apart relation. The body has a narrow edge surface from which the rods protrude. A probe wire welded to the rods and extending along the edge surface and ceramic adhesive for securing the probe wire to the surface so that the probe wire is rigid. A method for fabricating the probe wherein the body is molded and precisely shaped by machining techniques before the probe wires are installed.

Abstract: In an electronic thermometer a probe having a resistance which varies in accordance with the temperature of the region being sensed is connected to a resistance bridge having characteristics for determining and indicating the resistance of the probe. The temperature sensing element in the probe is constructed of materials whose characteristics are intrinsic and highly stable. The temperature sensing element is of small mass and is thermally isolated from the body of the probe so an accurate temperature can be measured in less than one second.The resistance bridge can be in one of two states depending upon the direction of imbalance of the bridge. These two states are respectively characterized by a high or low output voltage which is relatively unaffected by the degree of imbalance. The transition between the two voltages is sharp, continuous, and well defined. In the low voltage state, the bridge has an extremely low power consumption.

Abstract: A variable temperature sensor for detecting and/or controlling the temperature of an object is disclosed. The variable temperature sensor comprises a thermallly conductive probe having one end adapted to contact the object the temperature of which is to be sensed, measured and/or controlled and its other end adapted to contact a heat sink so as to create a predetermined temperature profile between the two ends of the thermally conductive probe, and a temperature sensing device having a predetermined temperature sensing point or range contacting the thermally conductive probe at a point which is substantially at the temperature sensing point or within the temperature sensing range of the sensing device.

Abstract: A hot wire anemometer having a body formed of heat resistant metal such as an alloy very high in nickel content. The body supports a probe wire in a moving air stream and is mechanically arranged so that the probe wire is disposed in a V groove in the body, which V groove contains a high temperature ceramic adhesive that partially encompasses the downstream side of the probe wire. Mechanical and electrical connection to the probe wire is achieved through conductive support rods that are constructed of the same high temperature metal, insulation between the body and the conductor rods being provided by a coating of an oxide of the same material which coating is formed in situ. Not only does the oxide coating insulate the conductor rods from the body but mechanically fixes the conductors within the body and maintains its integrity at elevated temperatures to which a hot wire anemometer is typically subjected.

Abstract: A temperature probe assembly including a housing with the temperature probe extending from one end with said end including means for retaining a probe cover. A probe cover ejector extends from the other end of the housing. Spring means within the housing serving to urge said probe and ejector in outwardly extended positions relative to said housing whereby said probe is urged into intimate contact with a probe cover and said ejector is urged in a retracted position. When the ejector is moved into said housing, it extends from the other end to release the retained cover.

Abstract: A hot stylus using a mandrel of soft material having good heat conductivity and good electrical conductivity is used to carry heat to the writing end of the mandrel. That end fits in an aperture of a jewel bearing surface which rides on the heat sensitive paper. The mandrel is soldered in a groove along a thermistor having a positive temperature coefficient. The mandrel also provides one electrical connection to the thermistor. The other electrical connection is by way of a foil contact soldered to an opposite face of the thermistor. That assembly is potted and assembled on a circuit board which provides the electrical leads from the stylus body to which the foil is soldered and from the mandrel itself.

Abstract: A temperature-measuring device has an elongated tubular housing in one of ose closed ends is received a noise-temperature resistor having at least one side connected via a wire constituting a thermocouple element to a lead connected to temperature-measuring apparatus. The other side of the noise-temperature resistor is connected to the tubular housing which therefore constitutes the other element within the housing and connected via leads to apparatus without the housing. The thermocouple element or elements may extend from the noise-temperature resistor outside the housing, or may be wholly contained within the housing and connected via a pair of leads to apparatus outside the housing.

Abstract: A multiple sensor temperature measuring device for measuring temperatures at a predetermined number of points along a line of investigation within a body is described. The device has a plurality of temperature sensors mounted on a corresponding plurality of expandable mounting members, each sensor being surrounded by electrical insulation and being contained within a protective sheath. The mounting members are expanded by suitable spacers to dispose the sheath in an abutting and temperature sensing relationship with the body at each predetermined point of interest therein.

Abstract: A thermistor for use as a temperature sensor for high temperatures which is sealed into a quartz tubular housing in a gas and liquid tight manner. In this construction current conductor elements are fused into the quartz housing to seal the thermistor in the housing in a fluid tight manner. Current supply lines of platinum in the form of wire or bands are connected between the thermistor and the molybdenum supply lines.

Abstract: A battery operated thermometer by which a person's temperature is measured by a thermistor which varies the current flow through a resistance bridge circuit, and the temperature is shown by adjusting a dial to adjust a meter to a null point. A quick connector is employed to connect the disposable probe in the bridge circuit. The probe consists of a pair of conductor wires in an insulating sheath and having bared ends held by pressure only in conductive contact with a thermistor chip by a plastic tip which shrinks to press the bared ends against the chip.

Abstract: A probe mounting apparatus adapted for use in the deep fat frying of French fries, fish, chicken and the like, wherein the length of cooking time is to be calculated by a timing computer responsive to the temperature of a predetermined portion of the cooking medium as sensed by a probe assembly including a stiff sleeve formed of a smooth surfaced metal and containing a temperature sensing element at its end. The probe assembly is repeatably and accurately attached to the fryer and immersed with its sensory element in a precise location in the cooking medium by means of a mounting apparatus comprising: a mounting block fixedly attached in a predetermined location on the fryer and having an opening therein, such as a slot, arranged to receive the probe sleeve and to define the position of the probe's longitudinal axis in the cooking medium.