Abstract: Apparatus for processing a sound transducer output by RMS and log converters over a wide dynamic range through automatic ranging circuitry sensing of log converter output to initiate range changes and fast averaging cicuitry responsive to range changes to implement the minimum RMS averaging time and to reset hold circuitry.

Abstract: A system is disclosed for producing a colored-motion picture film from a black-and-white source film. Each frame of the black-and-white film is projected as an image onto a work surface to which colors are applied within selected areas for combination with the projected black-and-white image to provide a color composite. The color composite is then photographed with color sensitive film. The black-and-white film is processed frame-by-frame, preserving registration from one frame to the next (in a sequence) with the colored format which is accordingly modified to a limited extent to produce each composite that is photographed.

Abstract: A gasket structure for supporting thermocouple junctions in a stream of gas passing through an internal combustion engine. The thermocouple leads are passed edgewise through a gasket, which is adapted to fit between the ports of an engine and the manifold associated therewith. The leads are firmly supported within the gasket, the junction formed by the ends thereof protruding into the gasket aperture. The thermocouple junction is thus disposed in the gas stream at a regular, predetermined distance from the combustion chamber of the engine.In one embodiment a plurality of thermocouples are embedded in an exhaust manifold gasket, each being associated with a separate exhaust port of an engine. A selector switch may be used to monitor the status of the gas flow through each port; or the thermocouples may be connected together so that an averaged signal is produced, and the signal utilized to monitor the fuel-air mixture ratio.

Abstract: A mouth thermometer combined with a pacifier in the form of a nipple to take the temperature of a young child or baby in the mouth thereof, instead of in the rectum, as commonly done so far, while averting the drawbacks inherent to the use of the conventional thermometer for so doing. The combination thermometer including a mercury thermometer tube defining a mercury bulb portion and a temperature display portion, a shield surrounding the bulb portion, a flexible nipple mouth-piece surrounding the shield and the bulb portion therein, and a stop ring integrally formed with the nipple mouth-piece and retained at the junction of the thermometer tube portions by an annular bulge of the shield.

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 temperature compensation circuit for sensors of physical variables, such as temperature and pressure, employs an effective constant current source that is sensitive to ambient temperature and which has an adjustable thermal slope and an adjustable output at discrete temperatures. The effective constant current source may be connected across the input terminals of a sensor such as a pressure transducer employing strain gages or it may be connected in series with the excitation current of such a transducer. Additionally, the effective constant current source may be connected in the output of a sensor such as a thermocouple that is responsive to temperature changes. When connected to the input of a sensor, the temperature compensation circuit controls the excitation current through the sensor as a function of the ambient temperature of the sensor and compensation circuit.

Abstract: A device and method for determining the time-temperature history of a solid, liquid or gaseous medium where the temperature is expressed as a single value of the total temperature conditions to which the medium has been subjected over a given time, the invention involving use of a fluid tight container having a spherical cell of constant wall thickness and permeable to water vapor, the cell containing a dry desiccant and the container being filled with water. Similarly, the vapor pressure history of the medium may be determined by use of a second, non-containerized, spherical cell together with the containerized cell.

Abstract: A disposable fever indicator is provided to determine whether or not a predetermined body temperature has been reached. The indicator comprises a vessel containing therein a movable member and means for exerting a force to move the member from a first position to a second position. The indicator further includes meltable bonding means disposed within the vessel and adapted to overcome the force exerted by the aforementioned means and keep the member in the first position until the predetermined temperature is reached at which time the bonding means melts and allows the member to move to the second position under the action of the force exerting means. The indicator is armed only prior to usage. Prior to arming the device, even if the predetermined temperature is reached or exceeded, the movable member will remain in the first position.

Abstract: A method of measuring internal temperatures of canned foods under actual operating conditions by placing recyclable thermal simulators in each batch of canned foods during the actual processing. A recyclable thermal simulator device having the same thermal characteristics as the particular canned food being simulated. A method for manufacturing recyclable thermal simulators by equipping a container substantially identical to those simulated with a suitable temperature indicator, filling the container with a porous, open-celled, sponge-like matrix material, uniformly distributing a liquid of a pre-determined specific gravity throughout the matrix material by means of a partial vacuum usually identical to that drawn on the canned food simulated and sealing the container.

Abstract: A bridge circuit for measuring the D.C. resistance of a resistive element having an induced A.C. current comprises impedance legs whereby the A.C. component can be balanced out. The invention has particular application to the measurement of high-voltage cable conductor temperatures.

Abstract: A calibration device is disclosed and claimed herein for determining the accuracy of a tennis racquet stringing machine. A cross member is securable in the machine in similar fashion to a racquet being secured for stringing therein. The cross member has a frame secured thereto and extending outwardly therefrom with the frame having a resistance member, preferably a spring loaded scale, secured thereto. An elongated element such as a nonextensible wire is secured to the resistance member to be pulled in the machine in similar fashion to a racquet string. When the element is pulled, the resistance member is encountered and at the proper time, will determine the pounds of pull on the elongated element. The determined pull can be compared to settings on the stringing machine to determine accuracy thereof for calibration purposes.

Abstract: Disclosed is a magnetically actuated fluid-level indicator for indicating the level of a fluid contained in a vessel having a gauge tube attached thereto and having a magnet-containing float floating in the gauge tube, the indicator comprising a plurality of interlocking elements united with one another, wherein each element comprises a support body and a magnetically actuated indicator means supported thereon.

Abstract: A temperature compensated inductive liquid metal level detection system and a preferred probe structure is detailed. The temperature compensation is provided by provision of a separate temperature compensation coil as part of the inductive probe.

Abstract: The thermometer of the invention is characterized by a substance, preferably a salt, the solubility of which changes with temperature and which is present in a solid or liquid phase in the temperature range in which the thermometer is intended to be used, said substance being extended in a space such as a column or the like one end of which space is arranged to be brought into contact with a specified quantity of a liquid solvent for said substance. Measurement of temperature is performed by observing how much of the substance will be dissolved before saturation of the liquid solvent.

Abstract: Valid artificial targets are generated by means of an external attachment ilizing a calibration transducer affixed against a homing system transducer within the nose section of the Torpedo Mark 48 Mod 1. The calibration transducer comprises four elements bonded to a Rho-C rubber surface with each element located in separate quadrants. A plurality of phase shifters for nulling purposes are connected between the four elements. Phase shifted signal inputs then enable the calibration transducer elements to provide acoustic signals corresponding to predetermined target angles.

Abstract: A disposable clinical thermometer of low cost and preferably mostly of plastic includes a stiff rod-like inner member having a longitudinal groove of like configuration extending its length. A baffle or lip is formed on one end of this rod to provide a restriction to the flow of fluid to the groove. This rod is inserted into a flexible and transparent tube which is a tight fit on the rod-like member. A plastic, rigid, liquid container forms one end of the thermometer and is bonded to the housing at the end which encloses the restriction on the rod. The other end of the outer housing is tightly closed. A colored fluid having a known expansion with the heating of the fluid is placed in the rigid container. This fluid contains a coloring material which as the colored fluid flows up the groove in the rod causes a color to form in the groove, which color remains even if the thermometer is cooled.

Abstract: A thermometer formed wholly of dielectric components inserted between the coils of a transformer winding immersed in cooling fluid within the case of a high voltage transformer, the thermometer having a rod responsive to temperature changes within the case to vary light transmission across terminals of a pair of fiber optics to an external signal converter connected to transmit converted signals to a readout unit.The body of the thermometer may take various forms according to the applications intended. In applications not requiring dielectric components, the body and sensing rod may each be formed of a different metal, with that of the body having a lower coefficient of thermal expansion than that of the other.

Abstract: An apparatus and method for calibrating high temperature strain gases which serve for both dead weight and constant deflection measurements. A cantilever support arm allows the test unit to slide into a furnace while one end is subjected to bending strain either by hanging weights upon it or by deflecting it with a push rod. The dual nature of the fixture permits both tests to be run without change of the test specimen or removal from the furnace.

Abstract: A device capable of indicating the time/temperature history of a frozen product, comprises a strained article of elastomeric material having a glass/rubber transition temperature above the storage temperature of the frozen article and having the property of relaxing over a temperature range below the glass/rubber transition temperature at a rate which is dependent on the temperature, and an indicator for indicating the amount of relaxation of the article on change of temperature through the glass/rubber transition temperature.

Abstract: A device for indicating the presence or absence of liquid at a single level in a tank, comprising a sealed cylindrical housing having one end wall permanently fixed and the other end wall removable. The housing has an internal shoulder against which the removable wall is seated. The latter has an annular recess extending about its periphery in which there is disposed an O-ring, adapted to sealingly engage the housing wall adjacent the shoulder and thus effect a watertight seal therewith. The removable wall is connected to the fixed end wall by means of draft screws and sealing nuts, the screws having spacers which mount two printed circuit boards in spaced relation with one another inside the housing. The removable end wall also carries at its outer side two concentric, conductor tubes on feed-through insulators, constituting a probe whose conductive or capacitive characteristics vary according to whether the tubes are submerged or dry.