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:
Jun. 15, 1976
Filed:
Aug. 21, 1974
Applicant:
Inventor:
Kazuo Ito, Tokyo, JA;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
G04C / ; G04B / ;
U.S. Cl.
CPC ...
58 2 / ; 58 5 / ; 5815 / ;
Abstract
An indicating device for use in an electronic watch circuit indicating visually on the dial of the watch that the power cell in the circuit is operating properly and the circuit itself is operating properly. Cessation of the visual signal indicates that the cell should be replaced. The device uses a light-emitting element energized intermittently by pulses generated in the watch's electronic driving circuit. The threshold voltage of the light-emitting element is higher than the voltage necessary to adequately drive the driving circuit for keeping time accurately. A drop of the voltage below this threshold results in absence of light emissions and this indicates the cell is near exhaustion and must be replaced.