Circuit arrangement for controlling the action of an adjusting device, in particular for a patient chair
US4549124A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 14, 1983 |
| Grant date | Oct 22, 1985 |
| Priority date | — |
| Expiry date | Feb 14, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/45022
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A circuit arrangement for controlling the action of an adjusting device, in particular of a patient chair, which comprises, as target value indicator, a digital-analog converter (1) and, as actual value indicator controllable by the adjusting device, a potentiometer (2), which receives an equalized feed voltage which serves to operate the digital-analog converter, and which is connected via a branch (13) to a comparator unit (12), whose other input is connected to output (8) of the digital-analog converter (1), and which controls the adjusting device (31, 32, 33). According to this circuit design, the digital-analog converter (1), and the potentiometer (2), form a Wheatstone bridge of which one diagonal is supplied with a single feed voltage, while the other diagonal contains the comparator unit (12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.