Abstract: A heating wire is wound around a casing within which a sensor body is placed. Thermo-sensitive switch means is connected to the heating wire, which is responsive to the temperature within the casing to control the rate at which electric current is supplied to the heating wire so as to keep the temperature at a constant value. The casing may be placed within an airtight housing which is made of an insulating material. A further heating wire may be arranged on the inner wall of the airtight housing, which is controlled by further thermo-sensitive switch means so as to keep the temperature within the housing at a constant value.

Abstract: A knocking detecting device for an internal combustion engine including: a casing in the form of an annular member fastened substantially perpendicularly to an outer sidewall of the engine block; a support member made of a vibration-isolating material such as rubber or synthetic resin, and having one end fastened to the casing and the other end projecting a predetermined distance from the outer sidewall of the engine block to a position within a water chamber or a coolant water passage; a pressure-sensitive member including pressure-sensitive surfaces mounted on the projecting end of the support member, facing away from each other and extending perpendicularly to the outer sidewall of the engine block, for detecting as a change in an electrical signal pressure vibrations transmitted as a knocking sound to the pressure-sensitive surfaces through coolant water from the partition when knocking is produced in the combustion chamber; and lead wires for delivering the electrical signal change responsive to the knoc

Abstract: A bowling ball weighing device is provided for determining weight imbalance between various opposed sides of bowling balls comprising a support stand having two substantially vertically oriented standards supporting a circular cradle freely and pivotally therebetween for free rotation of the cradle about an axis of rotation extending between the standards. The cradle is adapted to receive a bowling ball therein, with the geometric center of a bowling ball lying in a vertical plane which includes the cradle axis of rotation and which divides the ball into opposed sides. An elongate indicator is securely attached to the cradle and registers on an indicia carrying field attached to the support stand the degree of weight imbalance between the opposed sides of the bowling ball.

Abstract: A device for detecting displacements of a fluid jet is disclosed. The device is particularly suitable for use as part of a fluidic angular rate sensor. The device comprises a wire resistor suspended between a pair of metal posts, a means for producing a magnetic field at the location of the resistor, an alternating current (AC) source electrically connected across the resistor for heating the resistor and for interacting with the magnetic field to cause the resistor to oscillate, and readout electronics for sensing changes in wire resistance which are a function of wire temperature variations associated with fluid jet displacements. The use of a single oscillatory wire resistor eliminates the need for the difficult to achieve and costly wire matching procedures of conventional two wire fluid jet displacement detectors.

Abstract: A conveyor chain motion measuring device is disclosed using a double take-off drive from the conveyor chain to produce accurate measurement of the actual chain speed and travel for the entire length thereof regardless of chain link pitch variations.

Abstract: An analog fluidic speed sensor including novel structure enhancing the signal-to-noise ratio of the sensor.

Abstract: An apparatus according to the invention includes a vibration sensor put near a traffic lane and for forming an analog signal the frequency values of which are stored when the analog signal is equal to a reference value. The speed is computed from the two stored values.

Abstract: A hard bearing cradle balancing machine involving novel elements for workpiece support and end thrust restraint, angle of unbalance indication and machine mounted drill press slide. "V" block bearings incorporating independently tilting pads provide uniform journal contact without torsional restraint that would otherwise result from workpiece misalignment. A device magnetically attached to the end of the workpiece maintains axial positioning thereof and communicates rotational position and speed information to an electronic vibration analyzer, as well as rotational reference information to the machine operator. A balancer mounted drill press slide freely traverses the workpiece axis, locking up only upon application of drilling pressure at any point thereon.

Abstract: This invention provides a method for detecting loss by leakage of liquid from a liquid-containing vessel by employing a submersible diaphragm-type pressure transducer having an integral operational amplifier in an appropriate electrical connection with a suitable power supply and digital volt meter. The method comprises steps of placing the transducer into the vessel beneath the surface of the liquid, energizing the operational amplifier to obtain an initial electrical output, recording the initial electrical output with a digital volt meter, adjusting the liquid volume of the vessel by a predetermined amount, (i.e.

Abstract: A relatively lightweight base assembly for a dynamic wheel balancing machine is stabilized by filling a pliant plastic bag carried by the base assembly with a sufficient volume of pourable material, such as water, to provide a free form body of ballast. Also, a plurality of bags of a type to receive pourable sand can be filled with sand, as desired, for supplying ballast and for damping machine movements.

Abstract: A needle mount, or assembly for installation of a tubular needle on the forward end of an essentially otherwise conventional syringe. The syringe includes the conventional barrel, reciprocable plunger mounted from the rearward end and within the bore of the barrel, and tubular needle mounted on the forward end of the barrel. The bore at the forward end of the barrel is provided with a conical entry feature, and a hub with a central opening which can be aligned upon the conical entry is mounted on the forward end of the barrel.

Abstract: To determine proper operation of a combustion sensor, and to normalize the output signals derived from a pick-up having a window exposed to the combustion chamber (10) by compensating for soiling, contamination, and loss of transmissivity of the window due to combustion residue, soot, or the like, a reference light source is provided introducing reference light of a predetermined level to the pick-up, for example when no light is generated due to combustoin events. In an internal combustion (IC) engine, the reference light can be energized during stopped condition of the engine, or during portions of the stroke of the engine when no combustion event takes place.

Abstract: Measurement of the relative and actual value of acoustic characteristic impedances of an unknown substance, location of the interfaces of vertically-layered materials, and the determination of the concentration of a first material mixed in a second material. A highly damped ultrasonic pulse is transmitted into one side of a reference plate, such as a tank wall, where the other side of the reference plate is in physical contact with the medium to be measured. The amplitude of a return signal, which is the reflection of the transmitted pulse from the interface between the other side of the reference plate and the medium, is measured. The amplitude value indicates the acoustic characteristic impedance of the substance relative to that of the reference plate or relative to that of other tested materials. Discontinuities in amplitude with repeated measurements for various heights indicate the location of interfaces in vertically-layered materials.

Abstract: A position sensor for detecting a displacement of an object, comprising a movable member coupled to the object, a permanent magnet connected to the movable member, and a magnetically soft member surrounded by an electrical coil secured adjacent to a range of movement of the magnet. Voltage pulses are applied to one end of the electrical coil, the other end of which is connected in series with the resistor. For each pulse applied to the coil, a voltage drop across the resistor is detected and a time lag between the leading edge of the applied pulse and the corresponding voltage drop across the resistor is measured by a processing circuit which produces an analog voltage or a digital code indicative of the time lag. A displacement of the object produces a change in magnetic field at the magnetically soft member which results in a corresponding variation in the above-noted time lag, which is therefore indicative of the displacement of the object.

Abstract: A chuck is mounted to the hub of an out-of-balance wheel and an indicator stem is connected by means of a ball joint to the chuck. When the wheel is rotated and reaches a velocity such that it tends to oscillate, the indicator stem is moved to an attitude where it extends across the axis of oscillation and is balanced in this position. The rotation of the wheel is then stopped and the position of the indicator stem indicates the location where a weight is needed on the wheel and the approximate amount of weight needed at this position.

Abstract: A method and device is provided for simply and rapidly measuring erythrocyte deformability by placing samples of blood on a set of porous membranes or a membrane strip with graded series of sharply defined pore sizes to determine the selective absorption thereon. Based on observation of the selective absorption on the membranes or membrane strip the deformability index of the erythrocytes may be determined.

Abstract: First and second reference fuels having different known octane numbers and a test fuel having an unknown octane number are each provided individually to the fuel inlet of an engine at a desired flow rate. The sample valve is utilized to inject test fuel into a fuel flowing to the fuel inlet of the engine so as to be able to determine the octane number of a test fuel based on only a small sample.

Abstract: A filter testing device is disclosed wherein the ends of a filter element is clamped between resilient seals in a filter holder member. A dioctyl phthalate smoke generator generates smoke which is passed through the filter element. An annular sampler which is mounted between the top member and base member of the filter holder member is moved vertically along the axial length of the filter. The annular sampler has an annular cavity therein with a plurality of radial holes extending from the inner diameter to the annular cavity. A vacuum pump draws the sample from the annular cavity in the annular sampler into a forward light scattering particulate detector device wherein the quantity of smoke is measured on a meter.

Abstract: An acoustic levitation system is described, which can utilize a single acoustic source (12) and a small reflector (14) to stably levitate a small object (16) while the object is processed as by coating or heating it. The system includes a concave acoustic source (12) which has locations on opposite sides of its axis that vibrate towards and away from a focal point (36, FIG. 2) to generate a converging acoustic field. A small reflector (14) is located near the focal point, and preferably slightly beyond it, to create an intense acoustic field that stably supports a small object near the reflector. The reflector can be located about one-half wavelength (L, FIG. 3) from the focal point and can be concavely curved to a radius of curvature (L) of about one-half the wavelength, to stably support an object one-quarter wavelength (N) from the reflector.

Abstract: The amount of particulate matter deposited on a fabric filter during operating conditions is determined by capacitive measurements. The fabric filter material is mounted on a first perforated electrode and a second electrode is spaced from the first electrode and capacitively associated therewith. Capacitance between the electrodes varies with the amount of particulate matter on the filter. Bridge circuitry is employed to determine the capacitance between the electrodes.