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:
May. 03, 1983
Filed:
May. 19, 1981
Applicant:
Inventor:
Dario Radaelli, Legnano, IT;
Assignee:
Alfa Romeo S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
3403 / ; 123337 ; 261-1 ; 261 62 ; 2502 / ; 3403 / ;
Abstract
For electronically detecting the displacements of a movable member, such as the throttle of an internal combustion engine an encoding card adapted to the Gray's encoding method is matched with said movable member and an array of phototransistors and photodiodes reads the opaque and the transparent windows formed through the movable member as they pass before the photodiodes so that voltage signals are generated which represent the digit 1 when a transparent window is read out and the digit 0 when an opaque window is read out, the arrangement and the sizes of the windows are in accordance with the Gray's rules of encoding.