Circuit arrangement for controlling the action of an adjusting d

Details Circuit arrangement for controlling the action of an adjusting d Circuit arrangement for controlling the action of an adjusting d

1983-02-14

1985-10-22

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

318624, 318678, G05B 106

Patent

active

045491240

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).

REFERENCES:
patent: 3726191 (1973-04-01), Johnston et al.
patent: 3736486 (1973-05-01), Gould et al.
patent: 4128797 (1978-12-01), Murata

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