Matches 101 - 150 out of 151 < 1 2 3 4 >
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3775737 DEVICE FOR SENSING PRESSURE IN A LIQUID MEDIUM  
A flexible seismic sensing cable includes cylindrically shaped piezoelectric sensing elements separated by cylindrically shaped insulating spaces along the longitudinal axis of the cable....
3748637 SONAR TRANSDUCER ASSEMBLY  
The sonar transducer assembly described includes a seamless diaphragm having a hollow cylindrical cavity closed at one end, an axis perpendicular to the plane of the diaphragm, an annular 45°...
3739326 HYDROPHONE ASSEMBLY  
A hydrophone assembly for use in a marine streamer having a cable core includes a piezoelectric crystal in the form of a cylinder that is mounted in concentric relation on the cable core by cap...
3732444 TUBULAR TRANSDUCER AND DRY COUPLANT THEREFOR  
A probe for nondestructive testing to identify internal structural defects comprises a tubular piezoelectric element adapted for low frequency vibration while moving in rolling contact over a...
3721953 IMPROVEMENTS RELATING TO HYDROPHONES  
A hydrophone adapted to be suspended underwater by means of a cable, which preferably carries electrical leads as cores thereof, includes a transducer element having substantially axial symmetry....
3713086 HYDROPHONE  
A hydrophone suitable for measuring underwater sound down to the level of the lowest ambient sea noise and at frequencies from approximately 1 Hz to 40 KHz wherein two longitudinally polarized...
3710151 ELECTROACOUSTIC TRANSDUCER FOR USE AT HIGH TEMPERATURES AND PRESSURES  
An electroacoustic transducer is encased in a unitary housing, preferably machined from a single block of material, which is chemically inert, sound conducting, and sealed against moisture seepage...
3706967 UNDERWATER ACOUSTIC PROJECTOR  
A high efficiency, broadband acoustic projector for deep water applications n excess of twelve thousand feet. The projector comprises an active element consisting of a plurality of piezoelectric...
3706925 POWER REGULATING AMPLIFIER SYSTEM  
A directional transducer system adapted for generating signals indicative of the direction of a source of radiant energy submerged in a fluid medium. This system is particularly useful in sonar...
3626956 ITEM TRANSPORT DEVIATION DETECTION DEVICE  
A device and method for detecting interruptions or deviations of normal item transport in an item transport pathway wherein a signal indicative of an interruption or deviation is generated whenever...
3624429 FREE FLOODED DEEP SUBMERGENCE TRANSDUCER  
A right cylinder of piezoelectric ceramic is centered in a hollow annulus. he annulus is filled with high dielectric oil so that hydrostatic pressure regardless of magnitude is perfectly equalized...
3618013 TRANSDUCER FOR DETERMINING THE ANGLE OF INCIDENCE OF SOUND WAVES  
A transducer for converting sound vibrations into electrical signals for determining the angle of incidence of sound waves. The transducer is constructed in the shape of a hollow cylinder. It has...
3543059 FLUTED CYLINDER FOR UNDERWATER TRANSDUCER  
3509522 SHATTERPROOF HYDROPHONE  
3462730 TRANSDUCER OF ACOUSTICAL ENERGY EXHIBITING THE CHARACTERISTICS OF A PULSATING SPHERE  
3449712 FOLDED TRANSDUCER TRANSMITTING OR RECEIVING FOR LOW FREQUENCY UNDERWATER SOUND  
3432000 SUBMERSIBLE DETECTOR FOR SENSING UNDERWATER SOUNDS  
3418624 Coaxially mounted line hydrophone  
3382481 Cantilever mounted hydrophone  
3372370 Electroacoustic transducer  
3332057 Single cardioid wave detector for seismic signals  
3328752 Extended frequency range pressure balanced hydrophone  
3321738 Distributed coupling transducer  
3309653 Ceramic transducer assembly  
3302163 Broad band acoustic transducer  
3284760 Hydrophone members  
3277436 Hollow electro-acoustic transducer  
3263210 Wide band hydrophone  
3263209 Pressure compensated hydrophone  
3263208 Pressure compensated transducer  
3262093 Pressure compensated sonic transducer  
3249913 Ultrasonic underwater sound generator  
3243769 Distributed coupling transducer  
3217288 Noise measurement hydrophone  
3178681 Hydrophone  
3177382 Mosaic construction for electroacoustical cylindrical transducers  
3172078 Acoustic velocity well logging instrument  
3058014 Apparatus for generating sonic vibrations in liquids  
3056589 Radially vibratile ceramic transducers  
3027540 Hydrophone with spaced electromechanical ceramic elements  
3019661 Ultrasonic transducer and impedance matching device therefor  
2989725 Electroacoustic transducer  
2974296 Electromechanical transducer  
2949910 Phonocardiac catheter  
2945208 Compressional wave transducer  
2922140 Selectively directive compressional wave transducers  
2906991 Transducer construction employin employing annular vibrators  
2852417 Cleaning method and apparatus  
2847516 Transducer  
2788454 Electromechanical transducer element  
Matches 101 - 150 out of 151 < 1 2 3 4 >