Centrifuge protective circuits for preventing excessive speed of

Details Centrifuge protective circuits for preventing excessive speed of Centrifuge protective circuits for preventing excessive speed of

1983-02-08

1984-05-22

Rubinson, G. Z.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318326, 318480, 494 9, G05B 900, G05B 1112, G05B 1118

Patent

active

044503911

ABSTRACT:
A light emitting element and a photo detector are disposed opposite each other in an outer housing of a centrifuge. When an angle rotor is mounted on a motor shaft, light emitted from the light emitting element is received by the photo detector without being intercepted by the angle rotor and, by the output of the photo detector, a permissible maximum revolving speed of the angle rotor is set high. When a swing rotor is mounted on the motor shaft, the light from the light emitting element is intercepted by the swing rotor, and hence is not received by the photo detector and, by the output of the photo detector, a permissible maximum revolving speed of the swing rotor is set low.

REFERENCES:
patent: 2733857 (1956-02-01), Beams
patent: 3445677 (1969-05-01), Leftwich
patent: 3931514 (1976-01-01), Patterson
patent: 3982162 (1976-09-01), Olliffe

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