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:
Aug. 03, 1993
Filed:
Mar. 15, 1991
Prima Electronics S.p.A., Turin, IT;
Abstract
An absolute position transducer (encoder) comprising an incremental encoder having a coded disk connected stably to a shaft, and connected to a sensor for emitting a signal for each complete turn of the disk The incremental encoder produces a first and second signal, each consisting of a sequence of pulses in which each pulse equals one elementary angular increment of the shaft, and a third signal (ZERO) consisting of a sequence of zero pulses, each emitted for each complete turn of the shaft. The absolute encoder comprises a resettable counter for counting the signal emitted by the sensor and memorizing the number of turns of the shaft in a permanent memory; and a control circuit enabled by a zero pulse generated by the incremental encoder, and cooperating with a coding circuit for emitting a coded dummy zero pulse in such a manner that, in the interval between the zero and dummy zero pulses, the first or second signal supplies a decoding circuit with a number of pulses equal to the number stored in the memory of the count circuit.