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:
Dec. 16, 1986
Filed:
Aug. 08, 1985
Applicant:
Inventor:
Joseph A Damoci, Beltsville, MD (US);
Assignee:
Control Data Corporation, Minneapolis, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
H04B / ; H04H / ; H04N / ;
U.S. Cl.
CPC ...
455-2 ; 455-4 ; 358 84 ; 358 86 ;
Abstract
A cable sensor for sensing a DC signal sent by a cable system's headend in order to switch a converter from converting one set of frequencies to another. When the cable sensor detects such a DC signal, it provides isolation from the DC for a cable tv ratings monitor connected to the cable system and further provides a signal to the monitor that the signal has occurred in order for the monitor to switch frequency/program assignments.