Quotables
"It is my heart-warmed and world-embracing Christmas hope and aspiration that all of us, the high, the low, the rich, the poor, the admired, the despised, the loved, the hated, the civilized, the savage (every man and brother of us all throughout the whole earth), may eventually be gathered together in a heaven of everlasting rest and peace and bliss, except the inventor of the telephone. "
Mark Twain ; Christmas greetings, 1890
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| Number | Title | Issue Date |
| 3979565 | Metal enclosed transducer assembly A thick layer of epoxy resin is used to bond together the piezoelectric member and a stainless steel cap to form an acoustic transducer having a broad frequency response, and specific assembling steps are taken to manufacture the transducer with good repr... | 09/07/1976 |
| 3974474 | Underwater electroacoustic transducer construction The electroacoustic transducer disclosed is of double mass loaded piezoelectrically driven type particularly adapted to high power sonar array application. For reducing transducer sensitivity to interference and noise of frequencies at and below the trans... | 08/10/1976 |
| 3953828 | High power-wide frequency band electroacoustic transducer An electroacoustical transducer assembly employs a plurality of focused poelectric elements. Each of said elements is made of a plurality of individual sections and energized to produce a radiation pattern having desired geometrical properties. The indiv... | 04/27/1976 |
| 3949348 | Sonar apparatus A side looking sonar transducer which has sound absorbing material extending forwardly of the active surface of the transducer elements to diminish the acoustic response over a predetermined zone for reducing the effect of erroneous reflection signals.... | 04/06/1976 |
| 3949352 | Velocity logger for logging intervals Method and apparatus for acoustically logging of a borehole wherein a beam of ultrasonic energy is transmitted from the borehole to the formation to produce substantially only shear waves in the formation. The shear waves are received at a position spaced... | 04/06/1976 |
| 3939467 | Transducer An electroacoustical transducer is disclosed as incorporating a metallic sing having an aperture located in the wall thereof. A plurality of shutters are rotatably mounted on said housing for effectively and timely opening and closing predetermined porti... | 02/17/1976 |
| 3939469 | Detection streamer This invention relates to detecting devices and more particularly to a new nd improved torpedo detection streamer having a plurality of microphonic detecting devices arranged therein in such a manner as to render the detection streamer substantially direct... | 02/17/1976 |
