Ultracentrifuge overspeed disk detection system

Details Ultracentrifuge overspeed disk detection system Ultracentrifuge overspeed disk detection system

1978-07-13

1980-05-27

Smith, Jr., David

Electricity: motive power systems

Automatic and/or with time-delay means

Radiant energy

233 1B, 233 24, 318313, H02P 506

Patent

active

042052610

ABSTRACT:
A method and apparatus for detecting the absence of a coded overspeed disk used to indicate the maximum design speed of a rotor which is rotatably connected to a high speed centrifuge. Two donut-shaped coded disks, one mounted on the drive shaft on the centrifuge and the other mounted on the centrifuge rotor are utilized. Optical emitter sensor assemblies are used to produce speed control and overspeed signals. By sensing the light reflected back to the optical sensor from the drive system hub, the rotational speed of the centrifuge is indicated. By sensing the light reflected back to the optical sensor from the overspeed disk mounted on the rotor, the rotation of the rotor is detected. In the absence of an overspeed disk, the speed control frequency will exceed that of the overspeed disk.

REFERENCES:
patent: 3164432 (1964-08-01), Johnson
patent: 3691440 (1972-09-01), Haddock
patent: 3746247 (1973-07-01), Camilliere
patent: 3809956 (1974-05-01), Burkel et al.
patent: 3809982 (1974-05-01), Cook

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