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:
Aug. 17, 1993
Filed:
Nov. 18, 1992
Applicant:
Inventors:
Robert E Morris, Jr, Indianapolis, IN (US);
Gene H Johnson, Indianapolis, IN (US);
Assignee:
Thomson Consumer Electronics, Inc., Indianapolis, IN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358190 ; 315411 ;
Abstract
In a television receiver the voltage applied to the loudspeaker from the audio amplifier is low pass filtered and coupled to a threshold detector. Normal audio is attenuated so that the detector is not tripped, but steady DC is passed through the filter and trips the detector. The output of the detector is coupled to the X-ray protection circuit of the receiver which acts to shut the receiver 'off'.