Tii Industries, Inc.

Tll Industries, Inc.

Emanuel J Pagliuca

Thomas J Smith

James A Roach

James D Chermak

A network interface module for providing connection between a customer's equipment and the telephone company owned portion of the customer loop is provided with a miniaturized easily removable module which includes the overvoltage protection device and the circuitry necessary to provide a prescribed line test termination impedance having a particular characteristic signature to the telephone central office when a continuity test is made on a subscriber line.

Network interface modules

A miniature station protector module for communication systems includes a hollow housing into which is disposed a pair of line terminals with a ground terminal therebetween. The line terminals extend into the hollow housing and include thereon a back-up surge arrester in axial alignment with each of the terminals, either a three terminal surge arrester or a pair of two terminal arresters may be utilized having one electrode connected to the ground terminal with the other electrodes being connected to the line terminals. The holding assembly for the surge protectors includes a ground bracket which is adapted to receive the surge protectors and includes a thermally sensitive material disposed between the surge arrester electrodes and the ground connection thereby providing both overheat protection by positively shorting the line terminals to ground if the overvoltage protection should overheat as well as providing back-up surge arrester protection by means of a back-up air gap provided by a dielectric disposed between the line terminals and the ground connection.

Miniature station protector modules

A back-up surge arrester is combined with a conventional gas filled surge arrester in axial alignment. The size of the air gap is held to a predetermined distance by aid of the mechanical configuration specified herein and further includes a heat sensitive material in a parallel breakdown path.

Back-up surge arresters

A line protector device for providing an electrical conducting path between a line and ground upon an overvoltage appearing on the line includes an overvoltage device having a pair of longitudinally spaced conductive terminals forming an arc gap therebetween. One of the terminals includes a longitudinally extending portion and an insulation circumscribing the extending portion which is inserted into a longitudinally circumscribing shorting clip and is provided with a centrally disposed slit in one end which receives the extending portion of the overvoltage device. The clip and overvoltage device are received within a conductive cartridge which then may be inserted into a conventional terminal block.

Line protector

An overvoltage surge arrester having an auxiliary breakdown path includes an elongated conductive electrode extension device received by one terminal of a gas tube arrester which has disposed thereon a pair of graphite washers with a mica washer sandwiched therebetween and a resilient insulating washer disposed between the extension device retaining head and one of the conductive washers. The other conductive washer is in intimate electrically conductive contact with the gas tube electrode that receives the electrode extension device. The assembly forms a creepage path in parallel with the surge arrester spark gap, when inserted into a conventional conductive cage and its associated tubular cap utilized with a station protector housing.

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Patchogue, NY, United States of America

Emanuel J Pagliuca