Radio age research, manufacturing, communications, broadcasting, television (1941)

EXCESS METAL IS ERASED FROM TIIK MASTER (left) AS A.\()THB:R WUKKEK EXAMIiNES A SCREEN FOR FLAWS. very thin, plating docs not take place instantly over the whole .sur- face but proceeds from the plating electrode in an ever-widening area until the whole surface is covered. After plating, the master with the screen in the grooves is washed and the screen removed. Depending on the master, the screen may "float" off in the wash water or require only gentle pulling to be freed from the grooves. Roughness of the etch producing the grooves FINENESS OF 50()-MESH SCREE.N IS ILLUSTRATED BELOW BY LAYING A SEC- TION OVER A PERIOD AND ENLARGING THE COMBINATION 70 TIMKS. mm^ largely determines the degree to which the screen sticks. High transmission, fine mesh screens are, of necessity, very deli- cate. To secure a screen mounted tautly on a frame is a difficult task if conventional mounting proce- dures are used. Fortunatclx- in this instance, nature was caught in one of her rare cooperative moods, for it was soon found possible to mount the screen in a safely loose condi- tion, using ordinary methods. Then, by holding the mounted screen for a few minutes in a vacuum in a temperature of about 900 "C, it was found that a contraction takes place that tightens the screen ready for use. With the start of factory produc- tion of the image orthicon the need for relatively large production of fine mesh screen became apparent. Mr. R. S. Moore, RCA Victor Divi- sion, Lancaster, Penna., took over the problem and has contributed improvements in the process. These advances result in a longer master life and a continuous high quality output in great numbers of 200 and 500 mesh screens of 75% and 60% transmission respectively, and in lesser quantities of 1000 mesh. NBC Television Newsreel Moves to New Quarters New quarters for the .\I!C' Tele- vision Newsreel will be ojjened early next month in the RKO-Pathe Stu- dios at lOGth Street and Fifth Avenue, New York City. In announcing the opening, Sid- ney N. Strotz, administrative vice president in charge of NBC Tele- vision, said that the entire job of editing, processing and storing the films is to be performed in the new studios. In addition to the space for film work, facilities available in the new studios include three live video studios and an entire floor for office personnel. The main live studio measures 97 by 74 feet. The move of the newsreel was timed, according to Strotz, to co- incide with completion of the reel's reorganization by Jerry Fairbanks Productions. After "moving day," the newsreel will be integrated within NBC's news operations. NBC now produces and broad- casts three new\sreels weekly in ad- dition to numerous special event and documentary films and a weekly ten-minute review of the news. 25-Year Employees Receive Gold Watches TEN employees of the RCA Ex- ecutive Offices who have served twenty-five years or more with the Company w-ere a w a r d e d gold watches at a luncheon held Septem- ber 17 in Radio City. Presentations were made by Edward J. Nally, first president of the Radio Corporation of America and at present a mem- ber of the RCA Board of Directors. Brigadier General David Sarnoff, President and Chairman of the Board of RCA addressed the group following the presentations. Those receiving the awards were George S. De Sousa, Vice President; Henry A. Sullivan. Controller: Wil- liam R. Eberle, Robert C. Hock, George H. Clark, Mary Millea, Clara A. Schlevogt, Eleanor F. Wetzel, Ella V. Smith and Alice Wishart. Marie A. Ward and Mary E. Casser- ly were eligible for aw-ards but were unable to attend. [RADIO AGE 19]