Abstract: An acoustic wave source and a radio wave source are installed close to each other on the ground. When an acoustic wave pulse is transmitted vertically into the atmosphere by the acoustic wave source, spherical wavefronts formed in the atmosphere by the acoustic wave are propagated upwardly at the velocity of sound. When a continuous radio wave is transmitted from the radio wave source toward the spherical wavefronts, it is reflected by the wavefronts and the reflected radio waves are converged to form a focusing spot on the ground. The position where the spot due to the convergence of the reflected radio waves is formed with the maximum intensity is detected by means of an antenna network formed of a multiplicity of receiving antennas laid out in the pattern of a lattice. The time-course change of such positions of the spots is traced to realize remote measurement of the height distribution of wind direction and speed in the atmosphere under surveillance.

Abstract: In the disclosed apparatus, flow of fluid in a pipe is sensed by directing acoustic signals at a fluid-metering rotor in the pipe. One or more transducers are used for emitting an acoustic signal and receiving acoustic reflections. A flow-representing signal is derived that varies with the attitude of the rotor in relation to the transducer(s).

Abstract: Apparatus for measuring the length of vee belts, particularly so that vee belts of closely similar length can be identified and thereby used together in multi-belt drives, comprises a fixed drivably rotatable pulley, a further pulley on a tensioning carriage, a belt to be measured being engaged on the pulleys, a drag chain to couple the carriage to a travel drive or to a tensioning station with tensioning weights, an absolute length measuring device to supply an electronic control and arithmetic unit and recording means to mark the vee belt with a symbol denoting a length tolerance part-range.

Abstract: A sealed differential pressure gauge of the general type shown in Phillips and Zoludow U.S. Pat. No. 3,645,140 in which a sealed housing is provided that includes a flexible diaphragm that is to be exposed to differential pressures to operate a sensitive and accurate motion transmitting indicator device that is in the form of a pivotally mounted helix cooperating with a range spring mounted magnet, with the range spring being linked to the diaphragm so that the movement of the diaphragm, indicates differential pressures and changes thereof, operates the indicator device for reading of the gauge. The housing comprises a housing member and back plate therefor that, together with the rim portion of the diaphragm, are shaped to provide for blowout capability of the gauge that is rearwardly directed out of the back of the gauge should overpressures be experienced when the gauge is in operation.

Abstract: A magnetic flowmeter includes first and second tube sections each having ls of non-magnetic material. The first tube is suitably connected to a process for passing a flow of an electrically conductive fluid to be measured. The second tube is established as a reference containing a still medium and is maintained at the same temperature as the first tube. A rotatable magnet assembly is disposed between the two tubes with at least two magnets attached to radially extending arms from a central shaft. Each magnet includes an air gap suitably sized to pass astraddle the diameter along a portion of the length of each of the two tubes. The magnets are provided in matched pairs spaced 180.degree. apart such that signals will be simultaneously generated in signal leads attached to each of the two tubes. By comparing the signals from the two tubes and varying the rotating speed of the magnet assembly until the signals are equal, or attain a maximum, the flow velocity of the fluid within the first tube can be determined.

Abstract: A test procedure and test apparatus is described for measuring the degradation in the physical integrity of a structural part by measuring the rate of decay of the amplitude of vibration of the part after it has been set into vibration at its free resonant frequency mode. The presence of invisible imperfections in the part such as may occur as a result of metal fatigue or from the development of tiny flaws or cracks will cause an increase in the rate of decay of the amplitude of vibration of the part. By making periodic measurements of the rate of decay of a structural part which is used in a critical highly stressed application subject to vibration such as a jet engine mount, the periodic degradation due to fatigue can be determined and the part is removed from service at a safe period before the degradation reaches an unsafe limit.

Abstract: A vibration sensor has a base with two support structures on the base. Each support structure includes a pair of spaced juxtaposed electrical contact members that define a support region, and a crossbar element that has two spaced apart electrically conductive portions is supported on the contact members in the corresponding support regions for completing electric circuits between the corresponding pairs of contact members and for movement away from the contact members under the influence of acceleration forces to which the base is subjected to interrupt those electric circuits. Terminal means connect each contact member to remote circuitry.

Abstract: A control and recorder system for a blowout preventer for providing a record of operation and status of the various components of the blowout control system at periodic times and after a function operation. The system monitors various functions such as whether the accumulator pump is running, the open and close status of the various rams, bypass, annular, flow line, kill line and choke line as well as various pressures, such as in the annular, the accumulator and the manifold, flow measurements of various fluids in the system and provides alarms for various parameter values. Control and status information may be transmitted through fiber optic cables between various control stations at the rig floor, accumulators and remote locations for avoiding interference by electrical noises or radio frequencies and providing a safety link through hazardous gas areas.