Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1982-06-17
1985-04-16
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324318, G01R 3308
Patent
active
045118418
ABSTRACT:
A nuclear magnetic resonance spinning apparatus includes an elongated cylindrical sample rotor with slotted air vanes on one tapered end thereof, an axial stator air drive and air end bearing, and a lateral ring air bearing around the opposite end of the rotor. The lateral end bearing retains the spinning axis at a precise pre-set angle, and the slotted air vanes are designed for high speed, low pressure applications. An adjustable cradle support mounts the spinning apparatus in a manner that allows convenient spin angle adjustment, and an insulated probe is provided with a convenient access opening and door structure for access to the spinning apparatus mounted therein.
REFERENCES:
patent: 3588677 (1971-06-01), Kleiman
patent: 4201941 (1980-05-01), Fyfe
patent: 4254373 (1981-03-01), Lippmaa
patent: 4275350 (1981-06-01), Hill
"An Apparatus for Obtaining High Speeds of Rotation", by J. S. Beams, published Nov. 19, 1930.
"Sur la Realization de Tres Grandes Vitesses de Rotation", by Henriot and Huguenard, published May 11, 1925.
"A High-Speed Magic Angle Spinner", by Zilm et al., Journal of Magnetic Resonance, vol. 30, 1978, pp. 563-570.
"Quick Sample Change Probe for Magic Angle Spinning NMR", by Opella et al., Dept. of Chemistry, Univ. of Pennsylvania.
"A Magic-Angle Spinning System for Bullet-Type Rotors in Electromagnetics": published 1981; by Bartuska and Maciel.
"A Magic-Angle Rotor for NMR Using a Forced Gas Bearing", by Baliman et al., accepted for publication in 1979.
"Design of High Speed Cylindrical NMR Sample Spinners", by Doty and Ellis, published Dec. 1981.
"Airfuge Ultracentrifuge", by Beckman Instruments (brochure) 1979.
"The Air-Driven Ultracentrifuge/a Rediscovered Wonder", by Spinco Division of Beckman Instruments; in Fractions; 1980.
Bartuska Victor J.
Dalbow David G.
Lewis David H.
Lewis Robin B.
Chemagnetics, Inc.
Tokar Michael J.
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