The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 28, 1986
Filed:
Jun. 02, 1983
Hermann Berger, Heidelberg, DE;
Franz Ernst, Heidelberg, DE;
Chemie und Filter GmbH Verfahrenstechnik KG, Heidelberg, DE;
Abstract
An apparatus for regulating a parameter by admission of an additive into a medium comprises a control pulse generator which is dependent on the extent of deviation from the norm, and a regulating element which effects the admission of additive during the interval of generation of a control signal. The control signal generator comprises a first timing pulse generator with a constant frequency and a first counter which receives the first timing pulses from the first timing pulse generator and transmits a first counter overflow signal after receiving a predetermined number of first timing pulses. The control signal generator further comprises a second timing pulse generator whose frequency increases with decreasing deviation form the norm and which transmits second timing pulses to a second counter which transmits a second counter overflow signal after receiving a predetermined number of second timing pulses. Still further, the control signal generator comprises a circuit which interlinks the first and second counter overflow signals in such a way that the first counter determines the duration of the periods and the second counter determines the width of the control signals.