โ Scribed by Thomas J. Dietz
No coin nor oath required. For personal study only.
The advantages of automatic speed control of oil-and air-driven ultracentrifuges have been amply reviewed in the literature. 1-7 It is the purpose of this paper to show that commercial equipment may be used successfully in recording and controlling the important variables in the operation of the air-driven ultracentrifuge. The automatic record of results not only aids in reducing personal error but also fixes any of the several major causes for failure of the equipment.
Various types of pneumatic support have been devised to relieve thrust-bearing friction on the rotor assembly of the air-driven ultracentrifuge.8,9.10 anau Recently the magnetic support ~,8 has been adapted by us to the air-drive. ~2 Because of greater stability over long periods of operation, the magnetic support was found to be more serviceable than the air-support previously used. Therefore the control system, the details of which are presented here, was designed primarily for the operation with the magnetically supported, air-driven ultracentrifuge.
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