North American Philips Corporation

Other

Thomas P Strong

Aravanan Gurusami

Victor J Jacek

Jeffrey L Cox

Robert J Chamberlin

Mark Chapman

A pipe line with integral fault detection and localization capability includes an inner electrically conductive pipe line element; a layer of dielectric material coaxial with the inner pipe line element, and an outer conductive coaxial element which, in combination with the inner pipe line element and the dielectric layer forms a coaxial transmission line for transporting fluids over long distances, and identifying and localizing faults.

Pipe line with integral fault detection

A subscriber control system designed to be placed outside of the subscriber's home, for controlling access to cable television signals provided by a cable television headend. The system is modular in design containing a single control module and a single RF distribution module both shared by a number of jammer modules. The jammer modules contain a plurality of frequency agile oscillators, the frequencies of which can be changed in time-multiplex fashion. The outputs of the jammer modules can be shared amongst a number of subscribers using space division switching. The system features switching utilizing a plurality of series connected diodes to form a transmission line switch and also utilizes filters having inductive elements which are configured by etching processes

Expandable cable television subscriber control system

A device is disclosed for controlling access to cable television signals. Jamming oscillators are shifted in frequency, jamming multiple services each. The oscillators are shared between multiple subscriber ports, providing a cost effective, high security control system. A modular approach allows security to be added as additional capacity is required.

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Pompey, NY, United States of America

Thomas P Strong