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: An instrument for indicating wind chill temperature has a temperature responsive means producing an indication of temperature and a wind velocity responsive means. Means operatively couples the wind velocity responsive means and the temperature responsive means for altering the indication of temperature produced by the temperature responsive means in accordance with wind velocity. The invention may utilize, e.g., a thermistor, a liquid column thermometer, or a bimetallic element as the temperature responsive means. The indication of temperature may be modified to give the wind chill temperature by a piezoelectric element, a heat transfer surface receiving a predetermined quantity of heat, or a member applying wind force to modify force produced by the bimetallic element, respectively.

Abstract: An attachment mountable on the end of the spout of a faucet fitted with means for indicating the temperature of the liquid flowing out of the spout. The device is of tubular shape and formed with a male thread for fastening into a female thread in a faucet spout. A bi-metal spring is mounted inside the tube, with the free end of the spring joined to an indicator mounted in a slot in the wall of the device and visible to an operator of the faucet to enable the operator to control the flow of liquid through the spout so as to provide a desired temperature of liquid.

Abstract: Physical quantities, such as temperature, mechanical stress, gas concentration and acidity, can be measured by means of elements which generate an EMF as a function of the relevant quantity. In many cases the temperature dependence of the conversion is inconvenient. The proposed temperature correcting circuit considerably reduces the said temperature influence, at least for a given operating range, in that the temperature-dependent internal resistance of the element is measured or used by means of an alternating current and the EMF is corrected by means of this temperature information.

Abstract: Master gear for checking tooth contact characterized by the fact that all or part of its contact surface is made of an insulating material and two sets of conductive detectors are regularly arranged on said tooth contact surface one of which extends parallel to and the other perpendicular to the flat sides of the tooth.

Abstract: A disposable type cooking thermometer having a reservoir for holding a fluid, an indicator means, and a capillary tube or channel connecting the reservoir with the indicator means. The reservoir is made from a material which shrinks from an initial size at ambient temperatures to some smaller size when exposed to cooking temperatures. As the reservoir progressively shrinks during cooking, fluid is expelled therefrom thru the capillary tube or channel and onto the indicator means to denote the degree of cooking achieved in the foodstuff in which the thermometer has been inserted.

Abstract: An apparatus for measuring an absolute temperature or a temperature differential. The apparatus uses two temperature sensitive switching devices exhibiting regenerative switching action at a power level which is dependent on the temperature sensed by such switching devices. Means are provided for simultaneously applying an increasing voltage to such switching devices to make them switch, and a detector is connected to both switching devices for measuring the time interval between switching of the first and second switching devices and for providing an output which is proportional to the absolute temperature sensed by the switching devices or to the temperature differential sensed by the switching devices. A display device is connected to the detector for providing a visual indication of the absolute temperature sensed or of the temperature differential sensed.

Abstract: Temperature sensors utilizing either one pair or two pair of inductive magnetic elements are disclosed. The inductive elements of each pair are constructed of different magnetic materials so that the permeability of the two elements change at different rates with respect to temperature. A plot of inductance vs. temperature for the two elements, thus, provides curves which intersect at the temperature which is to be sensed. Permanent magnets are positioned adjacent the temperature sensing elements in order to provide a mechanism for adjusting the cross-over temperature point of the magnetic elements.

Abstract: A device for use with a gas flow meter for automatically averaging the temperature of a gas flow with respect to its volume, includes a temperature sensing device for sensing the temperature of the gas flow through the flow meter and means responsive to the output of the temperature sensing device for deriving an output signal representing the temperature recorded by the device at any instant. Successive flow signals from the flow meter each representing the flow of a predetermined volume of gas are totalled in a first summing means, and the output signal derived from the temperature sensing device is entered into a second summing means whenever a flow signal is entered into the first summing means such that the second summing means totals successive temperature signals.

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 system for measuring the temperature of the walls of a metallurgical furnace employs a temperature measuring rod mounted for reciprocal movement in an aperture in the furnace wall from an extended position projecting into the interior of the furnace to a withdrawn position. Cyclic reciprocating movement is imparted to the rod by an actuating mechanism, mounted on the furnace wall and including a double acting fluid motor and a servomechanism. The actuating device includes an articulated mounting mechanism permitting the device to be positioned by pivotal movement about two mutually perpendicular axes whereby alignment difficulties on rebuilding the furnace wall are eliminated. Means are also provided for quickly disconnecting the servomechanism to facilitate manual positioning of the measuring rod.

Abstract: An electronic thermometer for home use comprising a casing containing a bridge circuit; a flexible probe containing a thermistor, said thermistor being permanently affixed to said bridge circuit through a lead wire and permanently calibrated to said bridge circuit; and further including storage means integral with said casing for storing said probe and said lead wire when not in use.

Abstract: An improvement has been made to a cryogenic liquid level detection system of the type wherein a small electrical current is passed through a filament of superconducting material to generate a voltage proportional to the length of the filament above the liquid level. This improvement involves automatically interrupting the current flow immediately upon the growth of the normal resistance state of the filament above the liquid down to the liquid surface. Normally current flow is then reinitiated after a preset time interval. In this manner there is a minimum energy input to the liquid from the current and thus evaporative losses of the liquid are minimized.

Abstract: An improved arrangement for measuring temperatures in which a bridge containing two temperature dependent resistances is used. A first branch of the bridge consists of a parallel connection of two series circuits each consisting of a constant resistance and a temperature-dependent resistance and a second branch of the bridge consists of a series circuit of two constant resistances. Means are provided to impress a constant current on the first bridge branch so that the current divides between the two constant resistances at the input and flows out between the two temperature dependent resistances. At the second bridge branch, a voltage corresponding to the voltage generated in the first bridge branch is impressed. A junction of the second bridge branch is at the same potential as the current sink of the first bridge branch.

Abstract: A sensing device that may be employed as a thermal or stress sensor includes in one embodiment a pair of poled electret layers as sensing mediums for detecting variations in the ambient temperature of the sensor. The electret layers of such embodiment have pyroelectric and piezoelectric properties, but only pyroelectrically produced electrical signals are used for sensing and piezoelectrically produced signals due to bending are effectively negated. In another embodiment, the electret layers are used as stress sensors whereby piezoelectrically produced electrical signals are sensed and pyroelectric signals are operatively canceled.

Abstract: An apparatus comprising a thin-walled cylindrical metal conduit inserted into the path of the flowing hot gas with a thermal sensor positioned in the conduit along its axis. There are one or more smaller diameter thin-walled tubes positioned inside of the larger conduit over a portion of its length. The smaller tubes are concentric with each other and with the larger conduit and surround the sensor, so that there can be gas flow through the annular spaces between each of the tubes and between the sensor and the inner tube. Means are provided for causing a flow of hot gas through these annular spaces so as to bring at least the central small tube up to the temperature of the flowing gas and with it the temperature of the sensor.

Abstract: Apparatus for measuring the temperature of the insulator tip of a spark plug being operated in an internal combustion engine. A thermocouple is embedded in the surface of the insulator tip adjacent the spark gap for sensing temperature. The output of the thermocouple is connected through an electro-optical ignition voltage isolation circuit to circuitry which maintains a substantially constant temperature signal during the time interval that ignition voltage is applied to fire the spark plug. The temperature signal may drive a temperature indicating display or devices such as chart or tape recorders to produce records which may be used in analyzing either operation of the spark plug or combustion.

Abstract: The method of producing a colored film from an exposed black-and-white picture and especially from an exposed black-and-white motion picture film wherein a black-and-white image is projected onto a surface, opaque pastel colors are applied within selected areas of the projected image and the reflected colored composite, of the opaque pastel colors and the black-and-white image superimposed thereon, is then photographed with color-sensitive film.

Abstract: A temperature calibration system including a well for receiving a temperature sensor such as a thermometer or thermocouple, and a heater for heating the well to a desired and adjustable temperature. A single well instrument providing a temperature range of 100.degree. to 1199 .degree. F in one degree steps. A control circuit for controlling well temperature to a few tenths of a degree and including means for manually setting the desired temperature, a bridge incorporating the temperature sensor and the temperature setting resistances, amplifiers for switching power to the well heater, and a null meter for indicating when the instrument is operating at the desired temperature.

Abstract: A transducer for measuring the surface temperature of the human and of animal skin with a resolution of 0,02 K (0.04.degree.F), a calibration accuracy to within 0,1 K (0,2.degree.F) absolute and a response time within 2 ms has been developed. The transducer includes a tube transparent to thermal radiation and open at both ends. A temperature sensing element is suspended across one end for placement adjacent to the skin.