Air Motion Transformer - Heil's "Air Motion Transformer" US Patents

Heil's "Air Motion Transformer" US Patents

US#3,636,278 issued Jan 18, 1972.
(Describes the Heil AMT variations, some of which resemble the ELAC JET transducer)
US#3,832,499 issued Aug. 2, 1974.
(Describes the Heil AMT embodiment used in the ESS AMT series)
US#4,056,697 issued Nov 1, 1977.
Movable diaphragm connector method flexible hinge diaphragm surround and...
US#4,039,044 issued Aug 2, 1977.
(Low-frequency AMT. The patent also describes the principle used by Tymphany for their LAT transducer including the embodiment type)
US#4,107,479 Aug 15, 1978.
(Further refinements of the low-frequency AMT)
US#4,160,883 Jul 10, 1979.
Acoustic transducer and method of making same

Read more about this topic:  Air Motion Transformer

Famous quotes containing the words air, motion and/or transformer:

    A multitude of little superfluous precautions engender here a population of deputies and sub-officials, each of whom acquits himself with an air of importance and a rigorous precision, which seemed to say, though everything is done with much silence, “Make way, I am one of the members of the grand machine of state.”
    Marquis De Custine (1790–1857)

    Wine gives a man nothing. It neither gives him knowledge nor wit; it only animates a man, and enables him to bring out what a dread of the company has repressed. It only puts in motion what had been locked up in frost.
    Samuel Johnson (1709–1784)

    Man, became man through work, who stepped out of the animal kingdom as transformer of the natural into the artificial, who became therefore the magician, man the creator of social reality, will always stay the great magician, will always be Prometheus bringing fire from heaven to earth, will always be Orpheus enthralling nature with his music. Not until humanity itself dies will art die.
    Ernst Fischer (1899–1972)