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DIAGRAM SHOWS HOW EXPLOSIVE RIVET WORKS. ELECTRONIC UNIT (RIGHT) EXPLODES POWDER IN OPENING OF RIVET. CAUS- ING THE SIDES TO EXPAND. Radiothermics Speeds Industry NEW FIELD OF INDUSTRIAL SCIENCE APPLIES RADIO FREQUENCIES TO SHORTEN PRODUCTION CYCLES; APPLICATION OF RADIO HEATING IMPROVES PRODUCTS AND SPEEDS PROCESSES. By I. R. Baker RCA Victor Division, Radio Corporation of America SINCE radio first attracted the attention of the world as a radically new system of signaling, its services have been broadening. From the dots and dashes of wire- less evolved the radiophone and worldwide broadcasting. Research which developed such magic keys to progress as the radio tube, con- tinues to open new horizons, some of them far afield of communica- tions. The first transatlantic signal in 1901 inspired many bold predic- tions among scientists — perhaps some day wireless would transmit the human voice, maybe it would carry pictures. To the average per- son those were fantastic dreams. It was difficult enough to believe that messages could flash through space at the speed of sunlight. Cer- tainly no Jules Verne appeared in the halycon days of Marconi to pre- dict that radio waves might be used to heat, glue, dry, case harden, an- neal, rivet, weld and even deactivate enzymes! All this and more too has come to iiass through the development of man's mastery over tiny radio waves — high frequency currents, which open a wide new field of use- fulness—I'adiothermics. We normally think of radio fre- quency transmittei's as a means of making jiossible ccmimunication and entertainment. Today, high radio frequencies are being used to short- en production cycles, improve prod- ucts and accomplish manufacturing processes which were jireviously impractical. Tomorrow, with addi- tional development and higher fre- quencies, will come numerous new applications. This new industry has grown rapidly since the start of the war and i-adiothermic equipment will be used extensively by the end of 1943. As a matter of fact, it is estimated that by that time more radio fre- (luency power will find use in indus- try than the total installed power of all the broadcasting stations (ap- proximately .'?,712.000 watts) in this country. When the first tubes and circuits 6 RADIO AGE