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:
Jul. 29, 1980
Filed:
Feb. 13, 1978
Applicant:
Inventor:
Walter Angst, Zumikon, CH;
Assignee:
Ackeret Design & Engineering, Ebmatingen, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09F / ;
U.S. Cl.
CPC ...
40451 ; 40546 ; 340380 ;
Abstract
An optical display presenting a display field at least one digit in a seven segment arrangement, a stack of seven plate elements for each digit and arranged in a stack, a single light source directing light into the light inlet ends of all of the seven plates, a movable shutter element wth transparent and opaque areas movable across the light source and light inlets of the plates, each plate having a chamfered edge portion remote from the light inlet end and reflecting light transversely of the plate and onto the display field.