Abstract: A device for immersion in a molten metal to determine a parameter of the molten metal including a parameter determining element and a first elongate section. The first elongate section is a replaceable section including a paper tube having a refractory coating on its outer surface. This replaceable section includes a first connector at one end thereof for detachably receiving the parameter determining element and for mechanically and electrically connecting the parameter determining element thereto. The replaceable section further includes a second connector at its other end with the second connector being electrically connected to the first connector. Also provided is a second elongate section having a third connector at one end for detachably receiving the second connector and for mechanically and electrically connecting the third connector to the second connector.

Abstract: Disclosed herein is a repeating use thermocouple assembly and method of making the same in which a cavity adjacent the tip of the thermocouple is filled with a thermosetting foundry sand and baked in place to provide support for the thermocouple tube without causing stresses during use which could cause breakage of the thermocouple tube.

Abstract: An improved temperature sensing structure (40) for use in a glass bending furnace (10) is made of the following. A thermocouple element (42) is provided which has a pair of thermocouple leads (44) and (46) terminating in a junction (48) which defines a planar loop portion of the thermocouple element. Mounting structure (50) is provided for mounting the pair of thermocouple leads with the planar loop portion thereof projecting outwardly from a free end. A protection tube has an elongated portion (54) in surrounding relationship to the mounting structure which mounts the pair of thermocouple leads and a free end portion (56) which in part surrounds a significant portion of the planar loop portion of the thermocouple element. The surrounding part of the free end portion of the protection tube is positioned so that the planar loop portion of the thermocouple element lies in a plane in facing relationship to an unsurrounding part of the free end portion of the protection tube.

Abstract: A thermowell apparatus for sensing temperatures in the fluid flow in a petrochemical furnace including a housing externally welded to a pipe or fitting and adapted to enclose a removable tip member of high alloy material and a removable thermocouple.

Abstract: An anti-vibration support for the unsupported tip of a thermocouple probe consists of a resilient, compressible, multi-sided sleeve. The sleeve is positioned between the outer surface of the probe and the inner wall of the protective housing. The sides of the resilient sleeve are deformed on insertion between the probe and the wall forcing the edges formed by the intersection of the sides of sleeve firmly into contact with the wall. This multi-point or multi-line contact between the sleeve and the wall firmly secures the tip end of the probe against vibration.

Abstract: A mounting arrangement for a condition sensing probe and method of making the same are provided, the probe being disposed in an opening of a wall of an apparatus and having opposed ends one of which is disposed beyond the interior side of the wall and the other of which extends beyond the exterior side of the wall. A bracket is secured to the wall and has an interconnecting part operatively interconnected to an interconnecting part of the probe whereby the bracket holds the probe in a fixed axial position in the opening of the wall. The interconnecting part of the probe comprises a slot in the probe and the interconnecting part of the bracket comprises an abutment disposed in the slot to provide the sole interconnection between the bracket and the probe.

Abstract: A thermocouple instrument which includes a thermocouple element formed of two dissimilar conductors joined at the ends thereof; an inner protecting metal tube for containing said thermocouple element together with an insulating material and electrically insulated from said thermocouple element via the insulating material; and an outer protecting metal tube in which said inner protecting metal tube is inserted. In this thermocouple instrument, the thermal expansion coefficient of the metal forming said inner protecting metal tube is equal to or higher than the thermal expansion coefficient of the metal forming said outer protecting tube, and accordingly the inner protecting metal tube is rigidly engaged within the outer protecting metal tube with excellent vibration resistance and impact resistance.

Abstract: A flexible coaxial thermocouple wire comprising an insulated inner thermoelement and a braided outer thermoelement surrounding the insulation covering the inner thermoelement. The braided outer thermoelement, in addition to forming one conductor of a thermocouple pair, also serves to protect and contain the insulation. Also encompassed is the formation of a thermojunction at one end of the coaxial thermocouple wire and connection of a termination to the other end.

Abstract: An improved thermocouple and method for making the thermocouple and installing same on the fireside of heat exchanger tubes or the like for monitoring surface temperature which includes a thermocouple assembly made from mineral oxide insulated metal sheathed thermocouple wires where a pair of thermocouple wires or conductors extend through a metal sheath in spaced apart and insulated relation from each other and from the sheath and are connected together at an end to define a hot junction member adapted to be mounted in engagement with the surface being measured, which hot junction is defined by a disk or bar-shaped member extending from the end of the sheated conductor assembly beyond the insulation and sheath but not in contact with the sheath. Installation on a heat exchanger tube includes welding the sheath to the tube which pressurizes the hot junction against the temperature measured surface and defines a heat energy path that bypasses the hot junction.

Abstract: A probe terminal for measuring the temperature inside of an enamelled reactor, for allowing a high speed of response to change in temperature and for detecting damage to the enamel of the reactor comprising a hollow cylindrical metal body provided at one end of a base in which is inserted and anchored, with enamel, a platinum cylinder hollow, the base of the platinum cylinder being unlined and in alignment with the enamel which coats the external surface of the hollow cylindrical metal body base, i.e., HCMB. One end of the HCMB contains the platinum cylinder. The other end of the HCMB is provided with means for attachment to the probe.

Abstract: The lower end of a hollow thermocouple well is removed and replaced by an end cap of a different thermocouple material than the well so that the junction between the end cap and the end portion of the well defines a radially activated thermocouple junction. A wire of the same material as the end cap is affixed to the end cap and electrical connections are made to the wire and to the well to provide a thermocouple output signal indicative of temperature measurement. In another embodiment two end caps are utilized at the end of the thermocouple well with the two end caps being of two dissimilar thermocouple elements and which have the necessary electrical connections made thereof to provide a thermocouple output signal.

Abstract: A thermocouple made of the silicon carbide and carbon. A carbon rod extends within a silicon carbide tube. The tube is closed at one end, and one end of the rod is fixed in a blind hole in the tube end to define the hot junction of the thermocouple, the hot junction thereby being located within the tube. An electrical insulator sealing ring closes off the opposite end of the tube. The tube is made by sintering a preform, the rod being within the tube, with one end in the blind hole, during sintering, so that the hole wall shrinks around the rod end.

Abstract: A protecting tube for a thermocouple is provided which comprises an outer shell made of a tubular molded body of boron nitride and an inner sheath made of a tubular molded body of ceramics.

Abstract: The invention relates to a pyrometric rod for measuring the temperatures of molten glass.The rod according to the invention comprises a rod containing at least a thermocouple, this rod being provided with a short tip of metal or metal alloy, the tip being surmounted by a brace of refractory material.The pyrometric rod is applied to measuring temperatures of molten glass in a glass bath or in a channel.

Abstract: Tube containing thermocouple is inserted through mounting sheath having fingers with projections in groove around tube, and sheath is inserted through flanges of pilot burner bracket and secured by split clip.

Abstract: A device for accurately measuring the temperature of a laminator and the method of using this device. This device is made from a cylindrical body adapted for tension adjustment, a probe, a means for adjusting tension which is positioned between the probe and the cylindrical body, a thermally conductive body attached to the probe and a thermocouple attached to the conductive metal body. This device is positioned perpendicular to a laminator platen during operation of the laminator. The temperature may be read from an appropriate meter to which the thermocouple of the device is attached.

Abstract: A repeating use thermocouple assembly includes a refractory fiber protective sleeve with a dome-shaped end wall which encapsulates the assembly. A blanket of refractory fiber is wrapped around the thermocouple element to protect the components of the assembly.

Abstract: A device for pressure sealing a reactor or thermowell extending therein comprising a disc having individual tubes welded thereto and sheathed thermocouples passing through such tubes and brazed thereto.

Abstract: Disclosed herein is a field replaceable protective cap for a thermocouple assembly for measuring the temperature of a molten metal bath. The cap has projecting pins which pierce and frictionally engage the refractory fiber sleeve which protects the thermocouple assembly.

Abstract: A surface thermocouple assembly and method of making same, characterized by a sheathed thermocouple cable having a sensing end including a preformed segment of solid metal welded to the end face of the sheath. The preformed metal segment has a contact face extending the full length thereof substantially parallel to the adjacent axial portion of the cable and adapted for contiguous intimate contact with the skin or external surface of the member whose temperature is to be monitored. Axially inwardly spaced a short distance from the end face of the sheath is a measuring junction which is formed by welding the ends of the thermocouple wires to the inside diameter of the sheath. Insulation material completely surrounds the measuring junction, and the end face of the sheath is closed by an end closure of weld metal which is ground flat to provide a uniformly flat attachment surface for attachment of the preformed segment thereto as by butt welding around the entire periphery of such surface.

Abstract: A thermowell apparatus for sensing temperature and supporting piping in a cracker furnace including a support member of 800H alloy material with a heavy construction for disposal in a high temperature furnace and a tip member arranged for welding to a pipe.

Abstract: The invention comprises a temperature sensing device comprising a thermocouple which is protected by a woven cloth. The cloth is impervious to wetting or transmission of the molten material whose temperature is to be measured. A thermocouple further is surrounded by weights of greater density than the molten metal in order to hold the thermocouple below the surface of the molten metal.

Abstract: A duplex thermocouple assembly for operation in a high pressure environment and to have a rapid response time. The assembly consists of two small diameter thermocouples and a fitting designed to protectively hold the thermocouples. The thermocouples are soldered into two axial channels which extend along the length of a stainless steel cylinder which forms a portion of the protective fitting. At the temperature sensing end of the assembly the ends of the thermocouples project slightly beyond one end of the cylinder. The cylinder is soldered at its other end into a hole axially drilled in one end of a larger stainless steel cylinder so that both cylinders form a protective fitting for the thermocouples.

Abstract: A flame detecting thermocouple for use with a gas valve to insure that the pilot flame exists before the gas valve can turn on the main burner. The thermocouple has a first rod shaped element which is composed of a high potential side thermoelectric material such as Chromel, Inconel, iron-chromium alloy and a second rod shaped element composed of a low potential side thermoelectric material formed of a 0.7 to 2% yttrium, 45-70% copper and the remainder of the alloy is nickel, and the elements are welded together at their ends to provide a junction which can be heated by a flame to produce a thermoelectric output at the other ends of the element.

Abstract: A suction pyrometer radiation shield comprising an elongated first alumina refractory tube, a series of smaller alumina refractory tubes arranged around and bonded to the inside surface of said first tube forming central passageway, an outer fracture resistant alumina refractory tube surrounding said first tube and an alumina refractory washer closely surrounding said first tube in abutting contact with said outer alumina refractory tube.

Abstract: The device is a metal coil, formed of high conductive material, and designed to fit on the pilot light thermocouple of gas fired appliances. Its purpose is to extend the sensitivity of the thermocouple, thus precluding erroneous gas shut off when air currents drift the pilot flame away from the thermocouple tube. This is accomplished by forming a heat gathering ring completely around the pilot flame and transmitting the heat directly to the thermocouple by conduction.

Abstract: A tube skin thermocouple assembly and method of making same, characterized by a sheathed thermocouple cable having an angularly disposed sensing end terminating in an end face extending substantially parallel to the axis of the adjacent axial portion of the sheath. A measuring junction of the conductors is formed in an end cavity in the sensing end substantially free of insulating material and filled with filler metal embedding the measuring junction therein, the filler metal thus providing an end closure having an exposed face substantially flush with the end face and forming therewith a contact face adapted for contiguous intimate contact with a tube surface. The end closure may be of a large mass of filler metal for direct welding of the sensing end of the assembly to the tube, and the contact face may be either flush with or slightly offset from the outer diameter of the adjacent axial portion of the sheath, respectively, for flush or radially spaced axial mounting of the assembly on the tube.

Abstract: A temperature sensing device for monitoring high temperature exhaust gases of an internal combustion engine which includes a sensing element and a support for the sensing element including a mounting stem, and electrical connection means secured to the end of the mounting stem which is outside of the manifold. A gas seal connection between the sensing element and the supporting mounting stem is located at a point removed from the hostile operating environment within the manifold and the fit between the sensing element and the mounting stem is such that a slight freedom of movement is available at the portion of the mounting stem innermost of the manifold to thereby shift the point of highest stress to the gas seal and securing connection between the mounting stem and the sensing element.

Abstract: 0.degree.COLD JUNCTION COMPENSATOR PROVIDES THE ELECTRICAL EQUIVALENT OF AN ICE-BATH REFERENCE THERMOCOUPLE, AT A SELECTED TEMPERATURE, FOR EXAMPLE O.degree. C. Input connectors, for engagement with conventional thermocouple units, form thermocouple junctions with conductors connected to a battery-operated Wheatstone bridge circuit adapted to supply an equal and opposite voltage output compensating for variations in the thermocouple junction output at different ambient temperatures. The compensator may be included in a module having input sockets or input plugs to coact with plugs or sockets of conventional thermocouple units. The compensator and battery may be encapsulated, or an accessible switch may be included in the battery circuit.

Abstract: A thermocouple is connected to a fuel control valve which automatically feeds fuel to the burner of a gas or oil appliance when activated by a current generated by the thermocouple due to heat produced by the burner. A fusible link safety device having an electrically non-conducting base and containing a fusible filament adapted to melt at a predetermined temperature is located above and in front of the burner. The fusible link safety device is electrically connected in series with the thermocouple and the fuel control valve such that when the predetermined temperature of the fusible filament is attained thereby melting the filament, the electrical circuit from the thermocouple to the fuel control valve is broken thereby deactivating the fuel control valve and shutting off the flow of fuel to the burner.

Abstract: A thermocouple protecting tube substantially has a duplicate tube construction wherein the inner ceramic protecting tube which contains a thermocouple element is concentrically enclosed by an outer protecting pipe which is of high thermal shock resistance.

Abstract: An improved heat shield for shielding a sheathed thermocouple from heat radiating from or to surrounding bodies having temperatures different from the temperatures of hot gases which are being measured by the thermocouple. The improved shield generally is comprised of two elements, namely, (1) an elongated refractory member having an axially extending central passage for receiving the thermocouple and a plurality of parallel passages surrounding the central passage and (2) a flanged tubular holder for attaching the refractory member to one end of a water cooled probe. The refractory member is constructed of a large diameter thin wall refractory tube which is bonded to the flanged holder and houses a plurality of small diameter thin walled refractory tubes which are bonded to the inner surface of the large tube. The tubes collectively and individually define the central and parallel passages.

Abstract: A temperature measuring device for use at pressures in excess of 1,500 bar. It comprises a thermocouple which is sheathed, the sheath being surrounded from end to end by an open ended pressure bearing sleeve. The space between the sheath and sleeve receives a hard or high temperature solder. At the outer end of the sleeve is a rigid cone or outwardly flared surface associated with a screw threaded nut which, when tightened, forces the cone against a shoulder to effect a fluid-tight connection at a point remote from the measuring junction.

Abstract: A temperature measuring device for electrically measuring the temperature at a predetermined point within a body member is disclosed. The device comprises a temperature sensor electrically isolated within a metallic sheath, the sheath being securely attached to a deformable mounting head. The head is deformed to produce a gripping force to intimately hold it in position within a cavity disposed in the body member and to maintain the sensor in a temperature sensing relationship with the predetermined point of interest. A spacer member is provided to substantially fill the remainder of the cavity to prevent distortion of the temperature field. A deformable lip is disposed about the periphery of the cavity which overlaps the spacer member and provides a holding force to assist in maintaining the sensor in position.

Abstract: A thermocouple assembly having a thermocouple encased in a tube having an outer carbon permeable layer and an inner carbon reactive layer. The assembly provides extended life for thermocouples used in a carbonaceous environment such as in the carbon liner of a furnace or in carbon bodies during baking thereof.

Abstract: A thermocouple probe for use in measuring high temperatures includes a ceramic rod having a pair of channels extending throughout the length of the tube, a pair of conductors of different material extending through the channels and being interconnected at one end of the rod, a titanium tube enclosing the rod, a ceramic tube enclosing a portion of the titanium tube and heat insulating, flexible tubing enclosing the conductors as they extend from the other end of the rod to a suitable electrical connector. Such a probe arrangement permits accurate sensing of temperatures in the range of 752.degree. to 2012.degree.F.

Abstract: Novel header for use in nuclear applications comprised of a base containing at least one bore, a niobium terminal passing through said bore sealed in an alumina plug which, in turn, is sealed in a bore defined in the base.

Abstract: Thermocouple apparatus for attachment to a pilot gas burner. A thermocouple has a mounting portion. An adaptor is mounted thereon engageable with a pilot burner bracket. The adaptor and the thermocouple mounting portion are yieldably restrained against relatively sliding movement to permit adjustment of the thermocouple body relative to the burner flame. The thermocouple is readily removeable from the adaptor for replacement even where the flame-engaging portion of the thermocouple has expanded.

Abstract: Replacement thermocouple apparatus for attachment to a pilot gas burner. The adaptor and thermocouple mounting portion are yieldably restrained against relative axially sliding movement to enable initial slip-on positioning of the thermocouple relative to the pilot burner flame. The thermocouple body is slightly rotated with an up and down movement within the adaptor to obtain final positioning of the thermocouple tip relative to the burner flame.