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Show YOUNG INVENTOR USES RADIO VACUUM TUBE TO GUIDE SHIPS ' :' ' . I, '! aMJU r . LmJ. i riLn rfiaitjfl, Lni'l O. Hanson anrl His Miniature Vacuum Tube. By NEA Service. READING, Mass.. July S. Helping the deaf to hear. Guiding ships into port through fg and darkness Keeping fisherman In yawls 'n touch With their mother ahlps. These are but three of the applications appli-cations Earl C. Hanson, a young inventor in-ventor hero, is making of the secret of radio amplification. Before long Hanson expects It to I cut down the loss of life in airplane accidents, Increase tho range of radio ra-dio reception, make tho voice carry , across the continent and eventually around the world! By 1925 he says it will be possible for people all over the globe to listen to the next president deliver his inaugural in-augural address! These aro not the fancies of an idle, dreamer but the predictions of a prac- 1 tlcal engineer who is doing more to . malte radio useful and beneficial out- j side the wireless field than anyone else. He does It bv vHng a vacuum tube! V UTl PHONE In the vactuphone. which amplifies a whisper so that it sounds like shouting, shout-ing, the tube Is an Inch and a half long. Yet it mako ;h- deaf hear' In his ship-guiding device, Hanson' uses the tube to produce a musical hum In a telephone receiver worn b the navigating officer. This directs his course into port even through the thickest fog! He has perfected a similar, but smaller. Instrument to keep fishermen in small boats from being lost at sea. "This vacuum tube " says the Inventor, In-ventor, "Is the most important electrical elec-trical development of tho 20th century." cen-tury." "Its applications are almost limitless. limit-less. "It can be used In detecting changes in temperature'. It can be1 employed in locating oil and oro bodies It is su lensltlve that the most feeble magnetic energy can he picked up and amplified " BEGAN vol SG. Hanson began his electrical experimenting experi-menting early. As a sevcn-year-oiii hoy in California Califor-nia ho used to break the doorbell circuit cir-cuit so that he might watch tho electrician elec-trician repair it. In elomentary school he made a wireless telephone with which he talked over short diet mccs. At 13 he Invented an n.ijiortant system of radio transmission. During the war he gave the government use of his many inventions including his audio-piloting audio-piloting system. In this a ship is guided Into port by the musical hum produced by a vacuum tube, which amplifies the magnetic energy created by a current cur-rent In a cable laid along the bed of j the channel. Colls, on --i1 ry the ship. pick up this energy. The, navigator listens in. When one side Is louder than the other, he knows he Is getting off the course and steers his ship accordingly. "Airplanes," suys Hanson, "can use the audio-piloting system Just aa vessels ves-sels do A telephone wire from one airdrome to another could take the place of the cable. The flyer, by listening through his receiving apparatus, ap-paratus, could follow this wire. "This will greatly diminish the danger of night flying." A little time and Hanon will have tho system perfected by another application ap-plication of his vacuum tube amplifier! |