Abstract: The penetration of a vein or the like by a fluid collecting or dispensing needle is rapidly confirmed by the transfer of thermal energy from fluid entering the needle bore upon such penetration to a temperature responsive medium in intimate contact with the exterior of the needle. The temperature responsive medium may comprise thermochromic liquid crystals which signal a change in temperature from ambient temperature by changing color.

Abstract: An RTD assembly is welded directly to the heat receiving surface of a heat exchanger and shields the resistance element from the combustion gasses and thermally isolates the resistance element from the sheath of a sheathed cable which electrically connects the RTD to remotely located associated circuitry. The resistance element is maintained in direct contact with the heat receiving surface of the exchanger to provide an accurate measurement of the temperature of that surface.

Abstract: An electric immersion thermometer, for use in a device such as a mixing faucet, is disclosed. The immersion thermometer includes a body which houses a temperature sensing assembly in which the sensing element is encapsulated or laminated in a plastic sheath or jacket. The encapsulating sheath being formed from a plastic thermally shrinking tubing and a plastic bracket for mechanically supporting the thermometer. A plastic insert also can be mounted in the body of the immersion thermometer that is coupled to the faucet. The plastic jacket has good heat conducting and electrical insulating properties.

Abstract: A system and method for detecting malfunctioning of a steam trap is disclosed employing malfunction detecting means, signal generating means and signal indicating means.

Abstract: This bubblejet device has integrated into it a number of heater resistors and a temperature sensor which operate in conjunction with a temperature regulating circuit to heat the chip to its optimum operating temperature within seconds of turn-on, and thereafter maintain that temperature regardless of local temperature variations. The precise temperature regulation of the array improves print quality.

Abstract: According to a method and an apparatus for measuring a water content, a thermal conductivity of a measurement target is measured, and a water content of the measurement target is calculated from the thermal conductivity in accordance with prepared data which represents correlation between a thermal conductivity and a water content of the measurement target. A water content management system controls the water content in accordance with the actual water content. If the water content is excessive, it is informed by an alarm system.

Abstract: Three embodiments of MicroCube Interconnection Hardware are disclosed: the MicroVac Vacuum Generator, the MicroControl Module, and the MicroSensor. Each embodiment is a combination of a MicroCube Precision Fitting and Various enhancements which provide precision control, regulation, or measurement of flows of gas or liquid in a semiconductor fabrication environment. The Microcube Precision Fitting is a substantially cubical unitary body that includes a central chamber and at least one external port. Each port comprises an annular counterbored step surrounded by a support wall which both enclose an aperture that extends into the central chamber. The MicroVac Vacuum Generator is a combination of a MicroCube Precision Fitting and three appendages: an inlet, a contaminant port, and an outlet. A first stage fits inside the inlet and is disposed coaxially to a second stage that resides within the outlet.

Abstract: A temperature alarm is disclosed for attachment around the exterior of the flue pipe of a wood-burning or similar stove, with alarm activation temperature selected by slidable adjustment along the flue pipe. A bimetal thermostat is mounted in close proximity to the flue pipe, and acts to close an electrical connection between thermally protected power supply and acoustic horn. A system test circuit is provided.

Abstract: A temperature detecting apparatus for pipes in refinery furnaces and the like comprises a thermocouple (2) which is supported in cantilevered fashion in the region of its detection end (2b) fastened to the outer surface of a pipe (5) which is located inside a furnace. The thermocouple is provided with a rod (2a) coming out of the furnace through an opening (3) formed in the furnace wall (4). Coaxial with the rod (2a) is a tubular protection element (10) which is secured along the rod, slidably and loosely passes through the opening (3) and extends as far as close to the pipe (5). Formed between the rod (2a) and tubular element (10) is an air space (2) through which air is sucked from the outside to the inside of the furnace by effect of the slight vacuum created in the furnace to cool the rod in order to prevent the thermocouple from being overheated due to the high temperature present in the furnace.

Abstract: An apparatus for protecting pipes subjected to freezing temperatures. An electric circuit is provided with a switch that senses the ambient air temperature in the vicinity of a pipe to be tested. The switch is set to activate an alarm when the water in the pipe reaches about 4.degree. C. to about 5.degree. C. The electric circuit is contained within a housing that is perforated to permit the sensing of the ambient air temperature. The housing may be provided with velcro straps to secure the housing to a pipe to be tested.

Abstract: The thermometer device enables the temperature of hot water or mixed hot and cold water to be read directly from the outlet of a tap or faucet or mixing tap or shower head. The thermometer device comprises a cylinder (1) including a conventional nozzle-type device (2) such as an anti-splash nozzle, a spray nozzle, an aerating nozzle, or a flow rate restricting nozzle. The outer circumference of the thermometer device is fitted with a liquid crystal temperature-sensitive sheet (3). This temperature-sensitive sheet is protected from ingress of water by a transparent resin envelope (4) which is sealed by a sealing ring (5). When water runs through the tap, its temperature is communicated to the temperature-sensitive sheet by conduction through the cylinder, and is then displayed thereon.

Abstract: A meter for integrating the operating time of a steam trap including an integrating instrument consisting of a transparent vessel containing an electrolyte between two columns of mercury across which a DC voltage may be applied and a thermocouple including a hot junction and a cold junction connected to said instrument, wherein temperatures sensed by the hot junction causes displacement of the mercury and movement of the electrolyte in order to provide an indication of changes in temperature in a steam trap assembly.

Abstract: A simple and inexpensive water temperature sensor that may be mounted on existing water faucets or showers to provide a ready visible indication of the temperature of the water flowing through the faucet or shower. The temperature sensor comprises an outer transparent tube mounted coaxially with the pipe leading to the faucet or shower head, a number of O-rings mounted within the tube and spaced along the length of the tube to form different compartments along the sensor, and a number of differently colored tubular members respectively forming a second wall for the compartments, with each compartment being filled with a material, such as paraffin wax, with the material in each compartment melting at a different temperature from the material in the other compartments, to become transparent and reveal the corresponding colored inner tubular member, when the water flowing to the faucet or shower has a particular temperature.

Abstract: A valve assembly comprising a temperature responsive servomechanism adapted to combine hot and cold water under pressure to produce a constant preselected temperature of water at an outlet.The valve assembly comprises a housing having a valving cavity, a hot water inlet leading to the valving cavity, a cold water inlet leading to the valving cavity, and a mixed water outlet passageway leading from the valving cavity. A valve member translates in the valving cavity and divides the cavity into two auxiliary chambers. A passageway through the valve member allows fluid to flow from each of the inlets to the outlet passageway at a rate that varies as the valve member translates. Passageways in the valve member permit a portion of the mixed water to flow into the auxiliary chambers. An auxiliary passageway is provided between each of the auxiliary chambers and the outlet passageway. A temperature responsive element is provided within the outlet passageway.

Abstract: This invention relates to a tubular element provided with a temperature sensor, in particular for measuring overtemperatures in the tube bundle of superheaters in thermoelectric power plant steam generators, comprising a pair of concentric tubes forcibly locked one into the other by a mechanical plastic deformation process, at least one of the two tubes comprising in the mutually contacting surfaces a series of longitudinal grooves into which temperature sensors are inserted.

Abstract: A water temperature sensing and control apparatus for automatic washers having a thermistor mounted within a projection that extends into a water inlet stream in a water inlet housing. A thermally semiconductive potting material encases the thermistor to provide a delayed response of the sensor to changes in water inlet temperature. A control circuit connected to the thermistor includes a pair of comparators for controlling hot and cold water inlet valves in response to the sensed temperature to achieve one of a plurality of selectable wash bath temperatures.

Abstract: A device and method for measuring a temperature difference at different positions which cancels offset voltages produced by a temperature sensitive element, e.g., a thermocouple used in the device and the device itself.

Abstract: Detector apparatus adaptably mountable about the external surface of steam pipes and condensate pipes, and wherein the apparatus includes a curved temperature sensitive bi-metallic element fixedly mounted at one end and with the opposed end being free to flex. A push arm is mounted at the free end of the bi-metallic element in engagement with a temperature indicating element for indicating a temperature either within or outside of a range of desired maximums and minimums, utilizing calibrated reference in the form of a rotatable dial. The surface temperature of the steam or condensate pipe being monitored is determined. The apparatus is provided with mounting member or system capable of use in combination with cylindrical surfaces within a range of diameters.

Abstract: A temperature indicator for a fluid fixture, such as a faucet, is adapted to be mounted on the fixture. It can be mounted within the handle of a faucet and can be stationary while the handle rotates. It includes a temperature probe which is subject to temperature of fluid flowing through the fixture. A power supply, for example solar cells, and electric circuit means are provided. A display device is connected to, and driven by, the electric circuit, and is arranged on an external surface of fluid fixture. The display device indicates the temperature sensed by the temperature probe.

Abstract: An apparatus for indicating the fluid flow through implanted shunts by temperature sensing. The sensor comprises a series of thermistors carried by a flexible substrate mounted on a rigid support. The sensors are placed in external proximity to a section of the implanted shunt and by varying the temperature of the fluid proceeding the test section, the apparatus will determine the rate of flow therethrough. Each thermistor is connected by conductors to scaling and amplification circuitry for input into a computer system.

Abstract: This invention relates to an instrumented unit for measuring temperatures and heat flux in evaporative walls of steam generators composed of a series of parallel tubes comprising a temperature measurement device formed from a plurality of sensors extending fluid-tight from a support member and inserted non-forcibly into complementary curved seats of constant radius provided in the cross-section of one of the tubes, the support member being fixed in straddling relationship and comprising, for the sensors, seats which are fluid-tight against the tube.

Abstract: A valve assembly comprising a temperature responsive servo-mechanism adapted to combine hot and cold water under pressure to produce a constant preselected temperature of water at an outlet.The valve assembly comprises a housing having a valving cavity, a hot water inlet leading to the valving cavity, a cold water inlet leading to the valving cavity, and a mixed water outlet passageway leading from the valving cavity. A valve member translates in the valving cavity and divides the cavity into two auxiliary chambers. A passageway through the valve member allows fluid to flow from each of the inlets to the outlet passageway at a rate that varies as the valve member translates. Passageways in the valve member permit a portion of the mixed water to flow into the auxiliary chambers. An auxiliary passageway is provided between each of the auxiliary chambers and the outlet passageway. A temperature responsive element is provided within the outlet passageway.

Abstract: Electric arc furnace, of the type having metallic walls (2) and an at least partly metallic roof (1), and provided with radiation detection apparatuses (8) for their controlled operation. Differential water circulation transducers (8) are positioned in the intrados of the metallic part (7) of the roof (1); they project with respect to the inner surface of the roof and their end faces (16) facing the interior of the furnace are concave.

Abstract: A device (10) for monitoring selected operating conditions of combustion within a solid fossil fuel burning furnace having a discharge flue includes a circuit (12) for monitoring the instantaneous temperature in the flue and providing a signal proportional thereto, and a visual status indicator (35) having a plurality of light emitting diodes (40-44). The number of light emitting diodes (40-44) emitting illumination at a given time is indicative of the selected operating conditions of combustion within the furnace.

Abstract: The disclosed apparatus comprises a sheet-metal strap having a strip portion that can be threaded through a slot in the strap so that a loop is formed to encircle a temperature sensor having pipe-encircling portions extending oppositely from the loop generally as a "figure-8", providing parallel heat conduction paths between the pipe and the temperature sensor. Extremities of the strap can be drawn toward each other, thereby developing tension about the temperature sensor and the pipe; and the extremities can be folded with each other as a means for tensioning the sheet-metal member against the temperature sensor and the pipe and for securing the strap in place under tension.