Centrifuge protective circuits for preventing excessive speed of different rotor types
US4450391A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1983 |
| Grant date | May 22, 1984 |
| Priority date | — |
| Expiry date | Feb 8, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/933
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.