Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1985-06-24
1987-08-25
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324318, G01R 3320
Patent
active
046895655
ABSTRACT:
In a nuclear magnetic resonance apparatus, a loudspeaker element free of magnetic material acts as an acoustic reproduction element. The loudspeaker element is arranged in the magnet space so that the main field of the magnet acts to generate a Lorentz driving force for the element. Together with a microphone function or an additional microphone (50) and an external loudspeaker.microphone system, a two-way acoustic communication system can thus be formed. Such a loudspeaker element free from magnetic material does not produce field disturbances in the magnet.
REFERENCES:
patent: 4484658 (1984-11-01), Grote
Kemner Rudolf
Reuvers Gerardus L. J.
Jaworslin Francis J.
Mayer Robert T.
Tamoshunas Algy
Tokar Michael J.
U.S. Philips Corporation
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