At&t Bell Laboratories

American Telephone & Telegraph Co., At&t Bell Laboratories

Jerry G Miller

Paul R Bufkin

James L Turner

David George Mihal

Robert R Beffel

Bernard M Dennison

Ellen R Blood

Kenneth L Brooks

The present invention relates to a window-attachment animal head device, primarily comprised of a body that resembles the head of an animal and that comprises at least one suction cup and at least one L-bracket that allows the device to removably-attach to a vehicle window. The body is also comprised of a set of ears, a set of eyes, a nose/snout, and a mouth with a tongue. Both the tongue and the ears may be of an exaggerated length and are non-rigid, such that they can be blown freely by the wind while the device is attached to a vehicle window and the vehicle is in motion. In this manner, the device allows a user to bring joy, humor and happiness to passing motorists which would ordinarily occur by bringing the pet in a vehicle, but without having to bring said pet into the vehicle.

Window-attachable animal head device

The present invention addresses an improved solution to the problem of cutover verification testing where a new digital switching system is to replace an existing switching system that serves at least a group of subscribers via continuous wire lines. It permits a plurality of existing wire lines to be concurrently connected to channel units associated with the new switching system without adversely impacting the existing service and automatic testing under the control of the new system.

Verification of subscriber lines prior to cutover to a new switching

When a floating battery feed circuit is used to power telephone lines, it is desirable to provide an anti-corrosion biasing circuit to keep the voltage on the tip and ring conductors from becoming positive. This can be done using an anit-corrosion circuit that sinks a dynamic amount of current from the tip conductor. A line circuit including such biasing is, however, incompatible with special lines such as PBX lines that rely on a grounded tip conductor in the talk state. In accordance with the present invention, a constant current is supplied from a ground reference circuit to the ring conductor of such special lines only when loop current is flowing. The magnitude of this supplied current is such that the anti-corrosion circuit holds the tip conductor sufficiently close to ground potential to allow the proper operation of circuits connected to the special lines.

Method and apparatus for providing a ground reference for telephone

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Wheaton, IL, United States of America

Jerry G Miller