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. 27, 1981
Filed:
May. 10, 1979
Applicant:
Inventor:
Diethelm Utzinger, Zurich, CH;
Assignee:
Mettler Instrumente AG, Greifensee-Zurich, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340715 ; 315129 ; 340765 ; 340641 ;
Abstract
One electrode each of at least selected ones of the segments of a seven segment liquid crystal indicator is connected to a test lead as well as an energizing lead. The voltage level of the energizing lead is compared to that of the test lead and an error signal is furnished if there is no correspondence therebetween. Where the seven segment indicator has a plurality of digits energized by a multiplexer, the electrodes of corresponding ones of the segments in each digit can be connected together and only one test lead is then provided for the so-formed set of segments.