Abstract: Apparatus for detecting leaks in fuel storage tanks. A float suspended in the tank liquid determines liquid levels and transmits the liquid level information via an infrared beam to a probe processor in the upper portion of the tank. The probe processor stores a plurality of level indications for subsequent uploading to an external computer which analyzes the level information to generate leakage rate information.

Abstract: Various methods have been proposed for measuring the viscosity of thermosetting polymers. It has been found that these method are generally inaccurate. A test which avoids the inaccuracies of previous techniques is proposed. In this test the heated thermosetting resin is forced at a known flow rate through a runner and through a capillary tube at the end of the runner. By measuring the pressure differential across the capillary a meaningful measure of viscosity is obtained.

Abstract: A method of correcting a zero point of a gyro, comprises the steps of detecting a speed of a moving body and outputting a speed signal corresponding to the speed; determining with the speed signal whether the moving body is at a stopping condition; computing an average value of output values of the gyro within a constant time in which the moving body is at the stopping condition, and setting the average value to a new zero point of the gyro; and correcting an output value of the gyro with the new zero point.

Abstract: This invention relates to an apparatus for determining the rheological properties of sedimenting suspensions. More particularly, this invention relates to a method and apparatus which permits the accurate determination of the rheological properties of particulate suspensions in which the particles are settling. An apparatus for evaluating the rheological properties of sedimenting suspensions comprising: (a) a sedimenting suspension retainer; (b) a device means suspended in the retainer, the retainer and suspended device being capable of being rotated relative to one another, the device being permeable to the passage of particles settling in the sedimenting suspension, the suspended device being suspended in the sedimenting suspension in the retainer in the region having constant density.

Abstract: A fluid injection method of nondestructive testing for bonding between two layers of material, at least one of which is penetrable is presented. One or two fluid injection members are inserted at selected locations along the penetrable material to the bond line between the materials. In the single injection member test, a fluid under known pressure is injected through the injection member to the bond line. The flow is measured at several locations and an average flow rate under satisfactory bonding conditions is noted. Any flow rates in excess of some fixed amount above this established norm is considered unsatisfactory. In the two injection member test. The two members are adjacently inserted through the material to the bond line and a fluid under known pressure is injected from one injection member to the bond line. If a disbond exists between the two members, the second member receives fluid from the first at the bond line.

Abstract: A curved acoustic probe provided with a plurality of electroacoustic transducers delivers a beam of acoustic energy which is directed by electronic scanning. Electronic scanning is carried out by utilizing only those electroacoustic transducers which are capable of insonating the target. It is thus possible to employ a large number of electroacoustic transducers in respect of each azimuth and therefore to obtain high definition. The invention applies to imaging techniques involving the use of acoustic waves such as ultrasonic waves and is primarily concerned with the field of ultrasonic medical imaging. Chief among potential applications are nondestructive testing, production of images within liquids such as, for example, underwater or ocean-bottom images.

Abstract: Dynamic wheel balancing is achieved at low (1-3 RPS) rotating velocity by mounting the wheel for rotation on a frame which is pivotally supported for any rotation caused by wheel unbalance. A transducer senses any frame movement and electrical signals corresponding to the maximum amplitude is produced by the transducer which signals are converted to indications of the amount of weight needed to balance the wheel and the location thereof.

Abstract: A sensor for measuring the rate of angular acceleration of an object around an axis of rotation. The sensor is relatively easy to assemble. The sensor has a fixed coil and a rotating magnet mounted on bearings with a torsion spring providing a restoring torque.

Abstract: A leak detection system and a method of detecting leaks are disclosed for detecting a leak in a system, including a pump, a dispenser, a conduit communicating the pump and the dispenser, and a valve in the conduit. The valve includes an electronic flow measurement device for detecting leaks in the system downstream of the device.The system may be operated by a control circuitry, which indicates a predetermined flow of fluid indicating a leak. The present invention is also directed to a method of detecting a leak in a system having a fluid pump, a dispenser, a conduit connecting the pump and the dispenser, a valve in the conduit, and an electronic flow detection system in the valve. The valve is provided with an orifice communicating the conduit with the electronic flow detection system.The method includes the steps of activating the pump and opening the dispenser to dispense a fluid, and then closing the dispenser while continuing the activation of the pump thereby increasing fluid pressure in the conduit.

Abstract: Disclosed is a roll rate sensor which may form part of a roll position sensor (an "up-sensor") and which comprises a vibratory element rotated by a motor within a projectile body so its rotation speed about the projectile axis is the sum of the motor speed and the projectile roll rate. The resultant centrifugal force acts on the element so as to vary its effective stiffness and hence its vibration frequency. A transducer is arranged to provide a signal corresponding to the vibration and hence to the centrifugal force and the roll rate. The vibratory element may comprise a metallic or silicon beam element.

Abstract: Disclosed is a gas rate sensor system which provides an output signal representing an angular velocity of the gas rate sensor when the gas flows more on one of its thermal sensing elements than on the other due to the effect of the angular velocity on the gas flow. The gas rate sensor system can carry out an arithmetic operation for correction of gas rate sensor output signal by selectively using a preset value representing the change of the gas rate sensor output signal with temperature in the gas rate sensor.

Abstract: Downhole measurements are made for accurately determining whether or not a core barrel contains an appropriate amount of core sample before retrieval of the coring tool is attempted. This is accomplished by using a known apparatus for measuring downhole weight on bit (WOB) at the beginning of a coring run to make a first measurement corresponding to the weight of all drillstring components suspended below the measurement point at a selected depth. Thereafter, the coring tool drills down the length of the core barrel. When sufficient drilling takes place to obtain a core, the drillstring is pulled up to the same depth as the measurement and a second measurement is taken. After correcting the data for temperature changes, the difference in between the first and second measurements is obtained and compared to a calculated weight for a full core.

Abstract: The shock resistance of an accelerometer for the measurement of an axial acceleration, having a sensing part consisting of an electromechanical beam, a spacer and a beam carrier can significantly be improved by making the two sections of the oscillating beam of unequal lengths and by providing the beam with a length between 8 mm and 11 mm and a width between 2.5 mm and 6.5 mm at a thickness of 0.6 mm. That way an optimum relationship between measuring sensitivity and shock resistance of the accelerometer will be reached.

Abstract: An acceleration sensor includes a body supporting a casing within which a magnetic member is received. A plurality of magnets are mounted on the body and disposed around the casing. The magnetic forces of the magnets hold the magnetic member in a reference position within the casing. The magnetic member is displaceable from the reference position against the magnetic forces of the magnets when the acceleration sensor is subjected to acceleration. A detection device is mounted externally of the casing so as to detect displacement of the magnetic member from the reference position. The acceleration sensor further includes a position adjusting device for adjusting the position of at least one of the magnets relative to the casing so as to set the intensities of the magnetic fields of the magnets in predetermined relation within the casing.

Abstract: An apparatus for measuring density of media moving through a conduit included therein comprises one or two vibrating sections under two different flexural vibrations vibrating at two different natural frequencies which are functions of the stiffness of the vibrating sections of the conduit, density of the media moving therethrough and viscosity of the media as well as the viscosity of the ambient air surrounding the vibrating sections of the conduit. A mathematical combination of the two different natural frequencies of the vibrating section or sections of the conduit eliminates the dependence thereof on the viscosities and determines the density of media accurately independent of the viscosity.

Abstract: The present invention provides a method for ultrasonic measurement of mainly the depth of a flaw possibly existent in a solid mass and opening to the surface of the solid mass. An ultrasonic wave is transmitted into the solid mass by scanning an ultrasonic probe back and forth on the surface of the solid mass with respect to a flaw in the solid mass, a threshold of a predetermined level is set for a curve defined by levels of echoes of the ultrasonic waves reflected from the flaw according to the position of probe, the area under the curve and above the threshold is integrated for the range of movement of the probe, and the depth of the surface opening flaw is measured using as an evaluation index the value of the integrated area of the area. The method according to the present invention is applicable to nondestructive, easy, accurate and realtime measurement of the depth of weld cracking in a welded portion, fatigue cracks in a stress-concentrated portion of members of a machine, etc.

Abstract: A push-pull accelerometer in which both force transducers lie in a common plane. Thus, when implemented in silicon micromachined device, both transducers can be fabricated from a single crystal layer, thereby producing transducers with closely matched common mode responses.

Abstract: An acceleration pickup for releasing occupant protecting devices in power vehicles has a housing, a ceramic plate which acts as a bending spring and is clamped at its one end in the housing, and expansion-sensitive resistances arranged in the ceramic plate. The housing is composed of several layers of ceramic structural parts and is produced by a thick film technique.

Abstract: An improved speedometer assembly of the electronic type which utilizes an electric motor mounted to a frame whereby the motor has an end flange portion supported against the frame by means of at least one swingable gate-like latches which are attached to a stationary support by an integral living hinge portion which provides a force against the edge of the flange.

Abstract: An ultrasonic squirter couples transducer emitted ultrasonic waves with a structure for ultrasonic testing. The squirter has a tubular body with an outlet on one end and an inlet spaced from the outlet for delivering a flow of liquid through the body to the outlet. The transducer mounts in the body in a position for transmitting and receiving ultrasonic waves through the liquid that passes through the outlet. A nozzle secures to the outlet for discharging the flow of liquid against the structure. A ring locates at the outlet of the body just downstream from the transducer. The ring and nozzle are of an elastomeric material containing metal oxide particles to absorb unwanted sound energy.