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:
Nov. 16, 1976
Filed:
Oct. 31, 1974
Applicant:
Inventors:
John M Bergey, Lancaster, PA (US);
Arthur H O'Connor, Lancaster, PA (US);
Assignee:
Time Computer, Inc., Lancaster, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G04C / ; G04B / ; G04B / ; G08B / ;
U.S. Cl.
CPC ...
58 2 / ; 58 5 / ; 5815 / ; 3402 / ;
Abstract
Disclosed is a solid state wristwatch having a digital light emitting diode display and a low battery voltage circuit for actuating the display to indicate the approach of battery failure. The battery voltage sensing circuit draws power only when the display is energized and causes one of the display stations to blink. It comprises a silicon band gap reference voltage circuit for comparing the battery voltage with a reference voltage that is independent of temperature and battery voltage variations.