Abstract: An electronic anemometer for measuring air mass flow in a conduit having a straight length of temperature-dependent resistive wire; a circuit board for holding at least a portion of the electronic circuitry used when the anemometer is operating to maintain the wire at a substantially constant temperature and generate an air mass flow-indicating signal based upon the air mass flow in the conduit sampled by the wire, the circuit board being mountable on the exterior of the conduit; a rigid support plate having a pair of spaced-apart openings, the plate being fixedly attached to the circuit board; a pair of electrically nonconductive support inserts, each of the inserts being fixedly retained within one of the openings in the support plate; and a pair of electrically conductive, resilient posts capable of withstanding the elevated operating temperatures encountered when the anemometer is operating, each of the posts having a wire-supporting end portion fixedly connected to the wire, the end portions being spaced

Abstract: A monitor is disclosed for monitoring the operation of an electrically powered load, such as a solenoid or a resistance heater. The load is connected across a power source and normally draws current therefrom. An integrated circuit includes means for energizing a load on indicator so long as the load is drawing current. A power on indicator is energized so long as the monitor receives power from the power source. When the monitor senses that current is no longer being drawn by the load it energizes a flashing on-off fault indicator.

Abstract: An improved apparatus and method for monitoring the characteristics of materials by their fluorescence are described. A unique design is employed in which common fields of view are provided for the optical paths for the illuminating light and the emitted fluorescence. In a preferred form they are coaxial. This permits the apparatus to be contained within a probe which may be inserted directly in a vessel containing the material to be analyzed. The device is specifically designed to withstand sterilization with steam, to operate aseptically within biological processes, and to maintain a high stability and sensitivity over extended periods of time.

Abstract: A magnetically operated AC switching device, such as an AC electrical contactor, is operable with a delay-on-dropout feature to permit safe shutdown of equipment energized therethrough in case of power failure. The device includes an AC pickup winding which is energizable from an AC power source and a DC holding winding which is electrically connected to a rectifier for energization of the holding winding with DC power from the AC source. A capacitor is also electrically connected to the rectifier in parallel with the holding winding for energization with DC power from the AC source. Upon energization of the device, the AC pickup winding moves fixed and movable contacts of the device into engagement, and the DC holding winding maintains them in engagement. The AC pickup winding can remain energized without burnout; and upon power dropout the capacitor supplies DC power to the holding winding for an instant to provide a slight delay in the separation of the contacts.

Abstract: An electronic anemometer for measuring air mass flow in a conduit having a straight length of temperature-dependent resistive wire; a circuit board for holding at least a portion of the electronic circuitry used when the anemometer is operating to maintain the wire at a substantially constant temperature and generate an air mass flow-indicating signal based upon the air mass flow in the conduit sampled by the wire, the circuit board being mountable on the exterior of the conduit; a rigid support plate having a pair of spaced-apart openings, the plate being fixedly attached to the circuit board; a pair of electrically nonconductive support inserts, each of the inserts being fixedly retained within one of the openings in the support plate; and a pair of electrically conductive, resilient posts capable of withstanding the elevated operating temperatures encountered when the anemometer is operating, each of the posts having a wire-supporting end portion fixedly connected to the wire, the end portions being spaced

Abstract: There is disclosed an improved temperature responsive pacifier assembly having a liquid medium disposed in an interior chamber, and a temperature-responsive element comprised of a spacer strip or element having one or more temperature display dots mounted thereon and formed of a liquid crystal material coated on a colored substrate. The liquid crystal material is responsive to a temperature above about 98.6.degree. F. whereby the liquid crystal material clears to expose the colored substrate thereby visually indicating an abnormal temperature condition of a mammal, and in particular, a homo sapien, orally utilizing such improved pacifier assembly.

Abstract: A compensator device for providing direct and automatic correction of electrolytic gas sensor performance anomalies caused by exposure of the sensor to high levels of ionizing radiation. The compensator device, which compensates for changes in sensor performance while operating in a radiation field, provides an electromotive force which directly cancels that portion of the electromotive force developed by the active electrolytic gas sensor produced by the radiation rather than by presence of the gas. The compensating device is constructed in the same configuration as the active electrolytic sensor with the exception that the sensing electrode of the compensating device is not exposed to the sample gas environment. The sensor and compensator device are connected in a circuit such that their electromotive forces oppose one another, thereby determining the difference between the signals so that the radiation induced component is removed, and only the signal representing the partial pressure of gas remains.

Abstract: A temperature sensing assembly comprised of clinical thermometer including a reservoir portion disposed in a body member comprised of a shaft portion having a lip positioning element at one end and an outwardly extending flared bulbous portion at the other end for positioning within the oral cavity wherein the clinical thermometer is disposed in a channel formed in the body member whereby by reservoir portions of the clinical thermometer coextends with the bulbous portion of the body member into the oral cavity of the mammal being temperature sensed.

Abstract: There is provided a voltage monitor which monitors a first voltage. A means for providing a reference second voltage is provided. Also, a signal third voltage which is obtained from and is proportional to the first voltage is provided. A comparison amplifier for comparing the reference second voltage and the signal third voltage produces an output voltage which goes to a first polarity when the signal third voltage exceeds the reference second voltage and which goes to a second polarity when the signal third voltage is less than the reference second voltage. Also, there is provided at least one indicator and at least one driver amplifier which amplifies the output voltage and drives the indicator into a first state when the output voltage shows that the signal third voltage exceeds the reference second voltage, and drives the indicator into a second state when the output shows that the signal third voltage is less than the reference second voltage.

Abstract: A bimetallic disc actuated thermostatic switch with thermal override comprises a base, a fixed contact on the base, a movable contact and a bimetallic disc which moves the movable contact into and out of engagement with the fixed contact to effect or interrupt continuity therebetween. A thermal override pellet which melts or deforms in response to an excessive temperature is provided in a cavity in the base and the fixed contact is mounted on a resilient arm which overlies the pellet. When an excessive temperature is reached, the pellet fuses or deforms and the fixed contact arm and the fixed contact move toward the base to separate the fixed and movable contacts even when the latter is in its normally engaged position.

Abstract: There is disclosed these and other objects of the present invention are achieved by coating a substrate with a temperature-response composition comprised of a colloidal suspension of inorganic compounds of a particle size less than 20 microns and greater than 5 microns and of a desired melting temperature suspended in a water-based solution of a water soluble organic compound wherein the temperature-responsive composition is formed by blending of from 30 to 70 parts of the inorganic compound from 70 to 30 parts of the water-based solution.

Abstract: A frequency modulated continuous wave altimeter and method of detecting the presence of an object in a predetermined area. The altimeter is generally comprised of an antenna for receiving and radiating microwave energy, a transmitter for generating frequency modulated microwave energy, a mixer for generating a sinusoidal resulting signal from the communication of transmitted and reflected microwave energy, and a receiver for processing the resulting signal and generating an output signal indicative of distance. The transmitter includes a Gunn diode for generating a carrier signal, modulating means for varying the frequency of the carrier signal, and a high frequency oscillator for impressing a tone on the modulating means.

Abstract: There is disclosed a temperature responsive pacifier assembly comprised of a liquid crystal material in a liquid and responsive to a temperature above about 100.degree. F., whereby the liquid crystal material changes color to visuably indicate an abnormal temperature condition of an individual utilizing the pacifier assembly, as well as a process for manufacture same.

Abstract: A gas analyzer for performing gas analysis on a sample gas containing contaminants which normally interfere with the operation of the analyzer is disclosed comprising a source of radiant energy; means for directing radiant energy through a sample gas; a disposable gas cell; a detector for receiving radiant energy; and a circuit for analyzing the output of the detector and indicating the concentration of predetermined constituents in the sample gas. The gas cell comprises a disposable sample gas cell having a sample enclosure for containing a sample gas volume; sample windows defining a portion of a sample gas optical path extending from the source of radiant energy through the sample gas volume to the detector; an inlet for supplying sample gas to the sample gas volume and an outlet for exhausting sample gas from the sample gas volume.

Abstract: A bimetallic, disc-actuated, thermostatic switch comprising a resiliently deformable actuator disc having an integrally struck actuator arm which extends radially inwardly to a point adjacent to a fixed contact. When the bimetallic disc is flexed in response to a predetermined temperature change, it applies pressure to the edge of the actuator disc proximal to the stem of the actuator arm causing the actuator disc to be resiliently deformed and causing the arm to be pivoted on a fulcrum in the switch, thereby causing the terminal end of the arm to move relative to the fixed contact to either open or close the switch. Since the arrangement is such that the edge of the bimetallic disc exerts pressure on the actuator disc, maximum deformation is imparted to the actuator disc thereby achieving maximum movement of the actuator arm for a given size bimetallic disc, thus permitting relatively small discs to be successfully utilized.

Abstract: A construction for a single pole double throw thermostatic switch of the type having a bimetallic disc which communicates with a resilient contact arm to alternatively effect electrical continuity between the arm and a pair of fixed contacts, and a method of assembling and adjusting the same. One of the fixed contacts comprises a bendable arm so that the gap between the fixed contacts is adjustable by bending the arm prior to final assembly of the switch. Because the gap is set prior to the final assembly of the switch, substantial increases in precision and reliability are realized since the contacts may be observed during setting thereof. Furthermore, the necessity for an external gap setting adjustment screw on the switch is eliminated.

Abstract: A grounded thermostat comprising a housing of non-conductive material, a cap of conductive material constituting a fixed grounded contact, a live movable contact supported in the housing in spring-biased engagement with the fixed grounded contact, a non-conductive transfer pin mounted with an end in the housing in engagement with the movable contact and with its other end protruding through the cap, and a bimetallic element secured to the cap in a position to engage the protruding end of the transfer pin responsive to predetermined thermal conditions.

Abstract: The amount of electrically conductive finish that has been applied to a filament is determined by measuring the conductance of a length of the filament. The measurements are made independently of any difference in conductivity of finish mediums by means of a reference cell containing a sample of the particular finish medium used. An electric measurement circuit provides an indication of the amount of finish medium on the filament by determining the ratio of the conductance of the length of filament to the conductance of the reference cell. In one circuit embodiment, two operational amplifiers are placed in series. The reference cell takes the place of the feedback resistor of one operational amplifier and the length of filament takes the place of the input resistance of the other amplifier. The resulting output of the series circuit is a scaled ratio of the conductances of the finish along the length of filament and in the cell.

Abstract: In a device for continuously monitoring the characteristics of a moving filament, such as the denier of an extended synthetic yarn, by passing the filament through a capacitive sensor to develop an electrical signal representing an absolute measurement of the filament with reference to a prescribed datum, the problem of measurement signal drift arising from contamination of the capacitive sensor is obviated by developing compensating signals to be combined with the filament measurement signal. The compensating signals are digitally formed and stored, thereby eliminating drift in the compensating signals themselves. The compensating signals are developed in an auto-calibration circuit, including an auto-zero circuit and an auto-gain circuit, which receives the measurement signal from the capacitive sensor.