Synchronization System for Two-Way Television*

In a previous paper presented before the June, 1927 Convention of the American Institute of Electrical Engineers, the method of securing synchronization of television signals was described as employed in the Bell System Television demonstration of April, 1927. The present paper describes the development of a new control circuit which is in use in the new two-way television system between the Bell Telephone Laboratories at 463 West Street and the American Telephone and Telegraph Company building at 195 Broadway, New York.