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:
“Liberty is the air that we Americans breathe. Our Government is based on the belief that a people can be both strong and free. That civilized men need no restraint but that imposed by themselves against the abuse of freedom.”
—Franklin D. Roosevelt (1882–1945)
“I still think I ought to leave Washington well alone. I have many friends in that city who can of their own motion speak confidently of my ways of thinking and acting. An authorized representative could remove some troubles that you now see, but only think of yet greater troubles he might create.”
—Rutherford Birchard Hayes (1822–1893)
“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)