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How cleilroiiii] HTille \)\{i\\m ill our newest arl I'oriii There's not a single moving part in a Kinescope — but it gives you pictures in motion No. 4 in a series outlining high points in television history I'ltDtiis front llif liisliiiltfil iiiUrilimi of lU A • PZver watcli ;m artist at work —seen how his hriish moves o\er the canvas to place a dot here, a shadow, a line, a mass, or hijililiijht there, until a picture is lormed? Next time vou're asked how tele\isioii pic- tures are made, rememher the paintbrush eompari.son. But the "brush" i.s a staticmary electron gun, and the "paint" is a highly refined coating of fluorescent material made light or dark in orderlv pattern by electrons. Developi'd by Dr. \'. K. Zworykin, now of RCA Labora- tories, the kinescope picture tube is one of the scientific ad- vances which gave us iill-rlrctronic television . . . instead of the crude, and nmv outnioded, mechaiiicil techniques. New 1 6-inch liCA glaxs-aitd-metal kinescope picture tube, almost 5 inches shorter than previous types, incorporates a new type of glare-free glass in its faceplate —Filtcrglass. PRINTED IN USA An experimental model of the kinescope-(/t'(<7ript'(/ /)(/ IJi. \'. K. Aiiniykin oj IK. A l.ahoKiloncs - is si rii i/iu/o^d/ii^ luburatorij tests. Tod,IV. tinongii rcscirch ,it HC.\ Laboratories, these com- plex kinescope picture tubes are mass-produced at I^C.A's tube plants in Lancaster, Pa., and Marion. Indiana. Industri.il authorities call this operation one of the most breath-taking applications of mass production methods to the joli ol making .1 precision instrument. Thousands of kinescope faceplates must be precisely and evenly coati>d with a film of aljsolutely pure fluorescent ma- terial . . . the electron gun is perfectly synchronized with the electron beam in the image orthicon tube of RC.\ television cameras . . . the vacuiun produced in each tube must be 10 times more perfect than that in a standard radio tube — or in an electric light bulb! Once it has been completely assembled, your HC.\ kine- scope picture tube is ready to operate in a home television re- ceiver. In action, an electrically heated surface emits a stream of electrons, and the stream is compressed iiy finely machined cylinders and pin-holed disks into a pencil-thin beam. Moving back and forth in obedience to a radio signal —faster than the eye can perceive —the beam paints a picture on the face of the kinescope. For each picture, the electron beam nuist race across the "screen" .525 times. To create the illusion of motion, oO .such pictures are "painted" in every single second. Yet despite these terrific speeds, there are no moving me- chanical parts in an HC.A kinescope. You enjoy the newest of our arts becau.se electrons can be made to be obedient. (jf^i Radio Corporation of America WORLD LEADER IN RADIO — FIRST IN TELEVISION