North American Philips Corporation

Robert J Chamberlin

Aravanan Gurusami

Victor J Jacek

Jeffrey L Cox

Thomas P Strong

Mark Chapman

A device for tapping the line power of a cable television distribution system. The device is intended for connection to a standard port of a cable tap. The device includes a threaded portion for connection to the port, a housing and an output connector mounted to the housing. Disposed within the housing is a module containing electronics forming a low pass filter to remove the line power from the RF television signal. The module is slidably mounted to extend out of the housing and is biased into engagement with the hot side of the port. The mounting of the electronics within a slidable module permits the low pass filter to be in close proximity to the port so as to eliminate interference with the television signal. The slidable housing also permits the device to be used with ports which differ in depth.

Line power tapping device for cable TV distribution having a moveable

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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Manlius, NY, United States of America

Robert J Chamberlin