Control installation for a dental apparatus
US4250439A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1978 |
| Grant date | Feb 10, 1981 |
| Priority date | — |
| Expiry date | Jul 31, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B19/40
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A control installation for a dental apparatus which has at least one part capable of being moved to a selected position of a plurality of positions characterized by the control installation including a drive motor for moving the part to the selected position, a clock pulse generator coupled to the drive motor creating a pulse received by a pulse counter, a read-only memory producing a nominal or reference value indication, a comparator comparing the nominal value indication with the indication of the counted pulses to produce an error signal which is applied to a switching amplifier and then to the drive motor so that the operation of the drive motor depends on the presence of the error signal with the direction of rotation of the drive motor depending upon the operational polarity of the error signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.