Indianapolis Times, Volume 35, Number 3, Indianapolis, Marion County, 15 May 1922 — Page 8

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RADIO FUTURE UNLIMITED AS SERVICE AGENT Noted Engineer Predicts Great Possibilities for New Medium. BY lAYID SABXOrF, General Manager Radio Corporation of America.

Tills Is the flrst of a series of arteles. by David SarnoJT, a recogniied authority on radio engineering. Those articles are published in the Times by special arranicement with the Radio Corporation of .America.

All world prepress rest* upon Interchange- of Intelligence. With the growth and spread of radio. Even into Isolated communities, humanitarian, educational and social 'possibilities come into view hitherto envisioned through no other egency. But to approximate the future of radio, we must understand the record of its past. Radio on the ocean forced Its way into popular imagination when the first cafl of distress was flashed by a wireless operator from a sinking ship. Radio as a means of International communication already ha proved itself not only by service rendered to the general public, but by the service it has rendered to Government, to industry and to trade. And now radio in the home is bringing entertainment and Instruction to millions of people who are just*begining to glimpse the possibilities of the net art. But the greater radio, the radio of the future, with Us manifold ramifications in the transmission of intelligence, this Is yet faint upon the horizon. EARLY HISTORY. The origin of radio lies In the experiments of Hertz, a German scientist. At the time of his discovery he was using among various laboratory devices, an apparatus known as an induction coil—an electrical .device which causes a spark. Its operation begins at a low voltage, or electrical pressure which it then 3t?ps up to so high a point that the electric discharge or spark flashes across between the spark points. Hertz found in experimenting with the spark coil that he had get into electrical vibration metallic bodies and various electrical ' devices. Knowing that there was no connection between" these and his sending appartus, he realized that he faced anew phenomenon, and by careful analysis of the effect of the current, he came to this conclusion: That "ether," whlca pervades everything, is capable of carrying electric waves (or, as later defined, "elec- j tro-magnetic waves”), and that these wares travel outward through the air in all directions.

MARCO N IS INVENTION. This discovery was widely published. It meant nothing, at that moment, however, to the general public, or the lay j mind—Jus; as the Einstein theory, for example, means very little to us today. Yet, it registered with a deep understanding on the mind of an IS-year-old youth then studying in Italy, Gugdemlo Marconi. He reasoned that if it were true that the ether carried these electromagnetic waves, if by this medium, electric energy could be carried, it would le desirable to break these waves U;. into a series of dots and dashes correponding to the Morse alphabet used in ordinary telegraphy. Having done that, the ether could be employed to do the work hitherto done by wire telegraphy. With this definite objective he began his ta'k He experimented extensjrely and found that, in order to send ou, the electric wives efficiently, It was necessary to connect up an insulated wire j suspended in the air with one side of the induction coll —and In this simple form came into being the first type of wireless sending apparatus ever used in the world. A definite return path was desirable for the electrical circuit, so he used the grWUnd; connecting It by wire to the other side of the coil,* still utilizing, of course, his connection to an aerial (or antenna, as it is technically called), j The wires one sees suspended over so | many housetops now are these antentfiie. I Haring found the moans of sending I electro magnetic waves through the air,! the next question was how to receive) them. To accomplish this, he developed j an instrument known as a coherer, the ' action of which was very simple. It con - j sisted of a ‘tßll glass tube within which were a number of filings: a wire from one side connected it to the aerial; another wire from the other tide went to the ground, through various coils or other apparatus. When the electric wave emitted from the sen ling station impinged on the receiving aerial, an electric current passed through the little coherer tube and acted upon those metallic filings. I Electrically speaking, it changed their j resistance. In ordinary language, this j .means simple that the character of the j filings changed: and every time that) change took place, something happened ;! either the * telegraph relay closed, or a! noise was made in the receiving tele- j phones, or an ink recorder operated. That j is. the feeble action on the tiny metallic j filings was used to do a specific job — to j make intelligible by sound or by a mark the dots and dashes of the telegraph j code. This was the original radio ays- i tern; a transmitting instrument which shot out dots and dashes by breaking up • at Intervals of short and long duration j the electro magnetic waves sent out into ' the ether. These electrical impulses, t traveling through the air. found their I way to any aerial wire siApended In the air; they would then go through the little coherer device, end be made Ineligible either by soutd or by a record on paper. PRINCIPLES OF TUNING.

The next problem presenting ltstff ■was to arrange matters so that if more than one emission of electro magnetic I wares was carrying dots and dashes through the air, the receiving apparatus would not get the conflicting ami simultaneous messages in the form of a Jumble of signals; In other words, there arose, the problem of Interference. The I answer to that was, tuning. Implied by ! that single word are many of the fa- j miliar terms appearing in the daily press i such as wave lengths, tuning apparatus and tuning coils, variometers, conden- | aers. and many other pieces of electrical apparatus that resolve themselves into associated devices to accomplish the end. Yet the principle of tuning Is simple. Consider— by way of analogy—the effect of resonance In music. It Vs common j knowledege, for example, that using a violin, when one string la tuned to a certain pitch and played upon, another string attuned to the same pitch will be set into sympathetic and powerful vibration; that It will of Itself respond and give music, or a single note of music. In music, this effect is known as symphony, or resonance. We call it the same thing in radio. The receiving apparatus is electrically tuned to the send- I lug apparatus, and vice versa, and a con- j dition of resonance Is set up between 1 the two circuits. Only then do we get a response. The electro-magnetic waves of radio travel outward from the transmitter in ail directions. To use another simple analogy: When a stone Is thrown into the water, an ever-widening series of ripples radia*-* outward: those waves die oit gradually, and the length of them and their character depend upon the size of the stone and the force with which it was thrown. Just so with radio. A stream of electro-magnetic waves Is sent out, and Its character and Its length, are regulated by the kind of apparatus used. Traveling In all directions, radio can do that which Is possible with means of communication; It HHBH through everything; the messageß|||||§

DAILY RADIO FEATURES

Try Radio-Audio Frequency Amplifier for Ideal Set, Expert Suggests

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BYRL DUNCAN. Director, Radio Institute of America. What's the best set of all for the reception of radio broadcasting? It's hard to say. But I think that the radio-audio frequency amplifier is close to the top. The irarts for this set cannot be made easily. But they may be bought In any supply shop and rigged up according to the diagram with little trouble. HOOK-UP. No. I—Antenna1 —Antenna tuning Inductance, which may be Just a simple tuning colL No. 3—Variable condenser of .0005 or .0006 microfarads capacity. Nos. 3, 10, 21 and 21—Amplifier, or

RADIOPHONE IS STOCK TICKER

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In place of the tele -caph stock ticker comes the radiophone. It has been Introduced In offices in i ,-arly ail the lnr ge cities and is gaining favor throughout the rest of the country. Directors of a Chicago banking firm are seen here discussing their regular business while the radiophone brings iu the latest stock market retorts.

rles practically cannot be stopped. So much for the fundamentals of radio communication, which It has been at tempted to set down without a bewildering array of technical terms. Other articles on the radio of today and tomorrow by David Sarnoff will appear in later issues of the Times. American Radio Fans Have It All Over English # Brother Operators. LONDON, 'May 15.—Amateurs In England are raising their voices for rights equal to those of their American brothers. At the recent annual conference of the Affiliated v Wireless Societies of Great Britain a resolution was passed requesting the Wireless Society of London to open negotiations with the Postoffice authorities regarding regulations of amateur wireless transmission. Asa result a committee of the Wireless Society of London has submitted the following requests to the postmaster general: LESS RESTRICTIONS. 1. That no restrictions be placed on amateur transmitting stations communicating with other amateur stations. At present, an amateur is limited to communicate with only five other allotted stations. 2. That amateurs be permitted to transmit for *nn aggregate maximum of two hours in each twenty-four, limiting each transmission io ten minutes. This would invalidate the regulation requiring an amateur to transmit only during the two hours specified in his license. 3. That wave lengths for amateurs he reduced from the present 1,000 meters to about 400 miters and an experimental length of about 180 meters. The last suggestion is due to compaiintg of the air ministry that aircraft traffic has been seriously interfered with by amateurs, who have been allotted the general wave length of 1.000 meters. If this is permitted to con’lnnc. says the committee. Interference will become worse when night flying‘becomes more general. Most amateurs use their transmitting sets in the evening. BENEFITS. Adoption of these three suggestions, HUSBAND WAS " ALARMED ABOUT HER CONDITION After Eleven Years of Suffering South Bend Woman Almost Despaired of Ever Being Well Again. Tanlac Soon Ended Troubles. "Before I began taking Tanlae T was In such a serious condition, and had suffered so long that my husband wfts alarmed and I had about given up hope of ever finding relief. ’’ said Mrs. Antnett Uuczyuski, lb 16 West Division street, South Bend, Ind. “Nothing I ate agreed with me and after every meal gas would form on my stomach and press up around Thy heart, causing such attacks of shortness of breth that I felt like I was going to faint. I had severe pains In the small of my back and was hardly ever free from headache. My nerves were in such bad condition that many nighre I got up and walked the floor for hours. “What i haven't tried in the way of medicine would be hard to name, but nothing gave ( me more than passing relief until 1 got Tanlac. But this grand melbMne has put me back in the finest heam. I eat anything, the backaches, andweadacbes are gone and my nervyM are as a rock. I'll never be .out IWir.'' ■KftfeAis sold by all good dtu^Bggg

HOOK-UP OP RADIO-AUDIO FREQUENCY AMPLIFIER.

“hard," vacuum tubes. Nos. 4, 11, 17, 22 and 25—Filament rheostats. No. s—Slx-volf “A" battery of 80 or more ampere hours capacity. No'B. 6 and 7—“A” battery potentiometers. No. B—Variable “B” battery of 17)4 to 60 volts. No. 9—Radio frequency transformer. No. 12 —Variable condenser of .0001 microfarads capacity. No. 13 —Variocoupler. Nos. 11 and 18—Variometers. No. 15—Grid leak and grid condenser. No. 16—Defector or “soft” tube. Nos. 19 and 23—Audio frequency trans-

according to the committee report, would produce*wo important results: “The first Is that the air service will have to further occasion to complain of amateur Interference. The second, licit the amateur will ,be satisfied with he power permitted him aud will not have the temptation to ignore the terms of his license as regards exce>slve power, unauthorized wave lengths, times of working and stations communicated wlta ”

RADIO PRIMER

RESONANCE—That function of a radio circuit by which the receiving Instruments are brought into tune with the transmitting apparatus, before signals can be heard. Comparison can be made with the tuning fork theory of acoustics, which Is that one tuning fork will not respond to another that Is vibrating unless loth are of the same key or pitch. In the same way a receiving set be placed into resonance, or “tuned up,” ! with the transmitting set to be beard, j

■ “SERVES YOU RIGHT IF THE KOKOMO BOYS MARRIED THEM SNAPPY LITTLE VISITORS FROM INDIANAPOLIS ’ * - / ~ IT ’ S ALL ABoUT and MONTE CARLO BOOTH J tarkington Wrote—■jppgPgJ“THE MAN FROM AMZ HOME” A Story of r~ GEORGS V J .P'TZMAunice , HOOSIER ThemenTnmyoM? % gbit, pluck and joy James Kirkwood ORCHESTRAL FEATURE I “THE EVOLUTION OF DIXIE” So Just Follow the Crowds to LOEW S STATE

fcqpil I TOM MIX UllmtmmJThe Fighting Streak' JOHN "SPECIAL PELIVERY”— FOX NEWS WEEKLY

formers. 1 No. 20 —Small fixed telephone condenser. Note that this fixed condenser is placed before the. audio frequency transformation. No. 26—Head phones of high resistance. SUGGESTIONS. In using this circuit, do not ground the negative side of the six-volt “A” battery. The potentiometer, No. 6, may be dispensed with. If not used, the filament rheostat must be placed in the positive lead of the filament circuit. This circuit may be used with an indoor loop. But for best results use a well strung outdoor aerial.

Men Usually to Blame, Says Judge RICHMOND, Ind., Slay 15.—Men usually are to tlame for divorce actions ind causes leading up to them, declared Judge William A. Bond of the Wayne Circuit Court In a Mother's day addross at the courthouse. "Woman is a honeseeker and a home lover,” said Judge Bond, who said divorce strikes directly at the sanctity of the home.

r j f—)i — f —) RADIO Radio Experimenters Do not fail to visit our department if you are searching for appliances or parts. Wo now have on hand A Complete Assortment Os Radio Parts and Sets “Service” Is the motto o? this department and its patrons be nef 11 accordingly. Pleasant surroundings, superior quality merchandise and genial salespeople make this a most satisfactory place to buy. Let Our Experts Answer Your Questions —Sixth floor.

MOTION PICTURES.

INDIANA DAILY TIMES

INDIANAPOLIS STATION WLK—--9:30 p. m., time and weather reports (485 meters), INDIANAPOLIS STATION WOH—--8:30 p. m., musical Drogram. ANDERSON (IND.) STATION WMA—--8.00 p. m., readings, Lillian Cook Miller; piano solos, Hazel Cook; songsr, George Arnott. CHICAGO, STATION KYW (central daylight savings time) — 8:00-9:00 "p. m., musical program by Catherine Tabeny, soprano, and Sallie Menkes, accompanist; Charles M. Hussey, bass, and Beulah Taylor Porter, accompanist, and Adymae Parsons Hathaway, violinist, and Mabel Lyons, pianist. 9 :O0 p. in., news and sports. SCHENECTADY (N. Y.), STATION WGY (eastern time)— 7 K)0 p. m., market quotations supplied by New York State department of farms and markets and weather reports. PITTSBURGH, STATION KDKA (eastern time) — 6:00 p. m., weekly review of business conditions, national Industrial conference board 7:00 p. m., “The Clerical Worker," Miss Edna Graham. “Teaching as a Vocation,” Mrs. Alice Carmalt. 8:00 p. m„ vocal and Instrumental selections by Whe members of the Glee Club of the Pennsylvania College for Women. 9:00 p. m., news and sports (United Press). 9:55 and. m., Arlington time signals. NEWARK (N. J), STATION WJZ (eastern time)— 6:00 p. m., “Business and Industrial Conditions In the United Btates," national Industrial conference board.

MOTION PICTURES INDIANAPOLIS AGAIN FAVORED WORLD’S PREMIERE RICHARD BARTHELMESS -IN“SONNY” A First National Attraction CIRCLE PRESENTATION THE BARCAROLLE FROM THETALES OF HOFFMAN’ SPECIAL ATTRACTION THOSE PERSONALITY CHAPS OGDEN and BENSON WRITERS AND SINGERS OF SNAPPY SONQ SUCCESSES SCENIC SPECIAL ‘MY COUNTRY’ MUSICAL ACCOMPANIMENT, MEDITATION FROM “THAIS,” A VIOLIN SOLO BY S. LEOPOLD KOfiLS AND A PROGRAM OF FEATURES

LYRIC. S°* nNUAC I mauricb UAFltt I SAMUELS 4 FLASHES! £££ 8 Big New Acts 8 Dancing in the Lyrle Ball Boom Afternoon and Evening.

MURAT I MATS., WED., THCRB. SAT. TUB STUART WALKER CO. a The ACQUITTAL A Melodrama by Rita Wed man.

RIALTO Comedy Bert Smith's Ragtime Wonders LITTLE MI§S MIXUP Matinee Every Day

TONIGHT’S PROGRAM

AMUSEMENTS. KEITH’S rontlnunun—Dally 1 :80 to 11 p. m. Vaudeville and First Bun Films. THREE WHITE KUHNS Peppy Musical Entertainers ROBERT BUCHANAN “A Virginia Romance” THREE OTHER ACTS I’ETEB B. HYNE S Saturday Evening Font Story ‘Motion to Adjourn* With MARJORIE DAW And ROY STEWART I’athe News—Topic*—Fble Continuous—Dally 1:30 to 11 p. m.

7:00 p. m., stories from St. Nicholas Magazine. 7:30 p. m., “How to Get a Job, by B. W. Ormstead. 7:45-9:30 ,p. m., concert by the orchestra and choral clubs, of the Young Women's Christian Association, of Newark; address by Mrs. Frederic Pais; “What the Y. W. C. A. Means to Me,” In poems and prose, by four members: negro spiritual songs; selections by sixty members of the Federation of Industrial Clubs. 9:30 p. m., recital by Paulino Jennings, soprano. 10:52 p. m., Arllngtpn tlm§ signals. DETROIT (MICH.), STATION WWJ (eastern time) — 7:00 p. m„ musical program. ATLANTA (GA.), STATION WSB (eastern time)— 8:00 p. m„ mnslcal program. SPRINGFIELD (MASS.), STATION WBZ — 8:00 p. m., baseball scores, musical program by John Myers, violinist, and Clara Morgan, pianist. CINCINNATI, STATION WMH—--8:15 p. m., musical program. Successor of ‘Dinny’ Mehan Is Murdered NEW YORK, May 15.—Joseph Behan, 81, an ex-convlct and called the successor of “Dlnny” Mehan as leader of the “white hand" gang, was shot and sfriously wounded as he lay in bed In bis Brooklyn home today.

BOYS! LISTEN IN On the Complete Radio Receiving Set Now in Operation at the Office of the DAILY TIMES

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The Indiana Daily Times super-sensitive Radio Receiving Set, comprising Tuner Cabinet and head set with Two Receiving Phones. Actual size of Tuner Cabinet, 7% in. x 6% in. x 4% in. This Set has been tested and approved by the Engineering Department of the Hatfield Electric Cos., Indianapolis. YOU CAN GET THIS RADIOPHONE WITHOUT COST Anyone can secure this wonderful set, in a few hours of spare time. Ask any of the boys who' have got Daily Times Radiophones and now are “listening in” on the local and other broadcasting stations. THIS SET IS NOT A TOY. It is on exhibition at the Daily Times Office. Come in and see it. You will find it is superior to any other crystal set. Every other Radio outfit of crystal type is a single circuit and "only works under most fqtarable' conditions. With the Daily Times set you can tune out any disturbance. Here is the description of it: „ j

No taps, continuous wave length variation, equipped with primary and secondary coils. Mahogany or oak cabinet, bakelite panel, beveled and graduated dial, sen-sitive--and permanent crystal adjustment. No batteries needed. No maintenance cost. Everything complete. Can be used with other units to build a loud speaking set. Wave length range, 750 meters. ■ Note: While this is rated as a 50-mile in-

THETRE GOING FAST! DON’T LOSE OUT!—CALL AT DAILY TIMES OFFICE 25-29 South Meridian Street t y -and Learn How Easy it is to Become the Owner of One

ICE CREAM TASTE GROWS STEADILY Demand for Typical American Dish Increases Constantly. One of tha most Interesting- features about American life, to/foreigners Is the American fondness for Ice cream. In Europe loe cream as we know it (Joes not exist, ns any former service man who had had his Ice cream taste go unsatlsffra for months' in France cen testify. The foreigners have water Ices and other substitutes, but Ice cream, In the true sense of the word, seems to be a purely American affair at the present time. The demand for the dish Is Increasing constantly in this country, according to J. B. Browder, president of the Browder Ice Cream Company, 918 North Senate avenue. “During the fifteen years our concern has been In business there has been a great growth In the demand for Ice cream," Mr. Browder said. "In the old days It was considered nothing more than a summer delicacy, to be eaten occasionally during hot weather, and on rare occasions when there was a social function of some sort. In late years this Idea has changed considerably. Ice cream now Is recognized as a food of high health value. It is prescribed by physicians, for their patients, and invalids find

strument, music and voice from more than 200 miles away, has been brought in clearly. The receiving radius varies, depending largely upon atmospheric conditions. The,head set consists of two receiving phones, 2,000 ohm resistance, navy type. Briefly, the finest, most sensitive and compact radiophone of its type. But it is only available under the terms of THE INDIANA DAILY TIMES’ great offer—you cannot buy this set anywhere. _

May is, 1922.

It especially valuable In speeding tbeiy recovery to normal health. “Also there hag grown up a demand tot better service oqjthe part of tbs publio. We are asked to deliver cream on emergency calls every day, and so perfect have we made our delivery system that it now la possible for us to make prompt do* liveries of any quantity In any part of the city on very short notice." “Our service Is not limited to ice cream as many persons believe. We handle not only the highest grade of this article but do a large business in milk and cream as well. We have made it a point to gives particular attention to home parties and I the success we have had In catering to this class of trade is sufficient proof that our service in thiß particular line has been fully appreciated by the public and our customers." Railroad Division Annual Reunion BLOOMINGTON, Ind.. May 15—Former members of the Rainbow Division, A. l E. F., will hold their annual reunion here Friday and Sautrday. Sidney S. Miller, Indianapolis, Is honorary "president of the organization. A dance under the auspices of the Psl lota XI, Saturday evening, will complete a program of business and social affairs.