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:
Feb. 10, 1981
Filed:
Jul. 31, 1978
Eugen Hohmann, Bensheim, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
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.