Evening Star Newspaper, September 27, 1929, Page 38

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NEW YORK, September 27 (NAN.A). | —Forty-two men, including captains of the radio and allled industries, capi- talists, engineers and patent attorneys, gathered this afternoon in the Park avenue apartment of Harris Hammond to view and hear a newly-developed radio receiving set for which astounding claims had been made. The inventor and his backers confl- dently told the assemblage that the principles upon which the set operated revolutionize theories and practices that now guide the field of radio. Moreover, prominent patent attorneys asserted | that these principles avoid all existing | basic patents in the radio art and vir- tually create an entirely new field of |radio development because of their (u{ldflmentfl“y new and radical char- |acter. . Dr. Riggs Conducts Showing. The demonstration of the set was conducted under the direction of Dr. Alger S. Riggs, its inventor, a young radio scientist from South Carolina. The host, Mr. Hammond, is president of the Mexican Seaboard Oil Co. and a son of John Hays Hammond, the noted min- ing engineer. His brother is John Hays Hammond, jr. famous as a radio In- ventor. | For mearly two hours Dr. Riggs, who |1s only 29 years old, held the nxed at- | tention of the laymen, engineers and technical counsel who had been invited |to the demonstration. When he was | through discussing his set and demon- strating its operation by turning-in varfous broadcasting stations they plied him with questions. ' Almost to a man the witnesses de- clared they were ‘“deeply impressed.” Every engineer present agreed that Dr. Riggs had demonstrated that he could accomplish what he claimed, although (the method of accomplishment was ‘withheld as the inventor’s secret. ‘The observers saw a small, compact device, looking somewhat like a radio receiving set’s chassis, but free from the confusion of wires and tubes usually seen inside the cabinet of an ordinary receiver. They heard the receiver broadcast programs reproduced through a magnetic loud speaker of the ordinary type. Then they heard phonograph records amplified through the new set. Faithful in Extreme. In all cases the reproduction was faithful in the extreme. The tonal quality and the clarity equaled, if it did not excel, the best the auditors had ever before heard. This held true of orchestral, piano, violin, chorus and single voice reproductions alike. The technical men heard and examined, somewhat dubiously at first but plainly becoming more and more impressed os they pursued their inquiries and con- ducted a few tests. A representative of Dr. Riggs read a statement, prepared by the inventor, in which it was asserted that the set avolds all existing circuits, including the basic tuned radio frequency; cir- cumvents practically all patents ever issued to cover the radio art, and opens fields of radio development hitherto regarded as utterly impracticable. In substantiation of Dr. Riggs’ claims to the discovery of a radio system radi- | cally different from any ever before | evolved, signed statements by Douglas | H. Kenyon of the patent law firm of | Kenyon & Kenyon, and Thomas Ewing, | the former United States Commissioner of Patents, were read. ‘Though radically new in design, the | set is extremely simple, and its inventor and his backers say will be much cheaper to manufacture than the sets now in use or on the market. Like the ordinary radio receiving sets, it employs tubes for detection, amplification and power output. But, unlike the ordinary receiver, its tubes must be of special design and manufacture. Therein lies the secret of the new system—a secret the inventor is guarding zealously. though he says the principles involved | are extremely simple. Does Away With Many Things. Mr. Kenyon explained—and engineers | or amateur technicians will readily dis- cern the radical departure from common radio theory, involved—that the Riggs apparatus “does not include the use of | negative grid bias, push-pull system, tuned radio frequency, grid leak and condenser, neutralization and balancing, regeneration, reflex arrangement or secondary emission.” Mr. Ewing confirmed Mr. Kenyon's statement in its chief details, and the engineers in the gathering agreed after the demonstration that the inventor had shown that the set could do everything he said it could do. To them it was an from conventional radio theory and practice. The backers of Dr. Riggs, | who are New York and Detroit capital- | ists, whose names are withheld at pres- | ent, believe that because of the avoid- ance of existing radio patents and the | excellent performance of the apparatus 3 Points of Superiority Gold Medal Cake Flour insures cake flour users: {1} Lighter cakes. {2} Finer texture. {3} Cakes that keep fresh longer. NEW TYPE RADID |2 obvious but still unrevealed departure | THE EVENING STAR, WASHINGTON, D. the new invention opens up prospects for commercial exploitation on a gigan- tic scale. Not only can the apparatus be used for radio receivers, but the principles involved in the broad patents applied for, it is said, will cover its use in broad- cast transmitters, radio-telegraphy, ra- dio-telephony, land-line repeaters, spe- cific high accuracy electrical measure- ments, amplification of extremely high radio frequencies and motion picture sound reproduction. ‘The only man whose direct connection with the project can be revealed is J. J. O'Brien of Detroit, who heads the Bri- hall Corporation, which controls the ’ patents. It is understood that nearly $200,000 has been spent by the young inventor's backers to carry the 14th & F Sts. N.W. 13th & F Sts. 14th & Irving Sts. SORE? cirex Cream. 7 B 223 P-:::se 35C At Liggett's Just drop one of “It’s Soft as Silk.” GOLD MEDAL CAKE FLOUR/ ' tummmbymm-fwmm~wm in a glass of water and mpt ai Stop Odors Use MERCIREX Wash the feet well in quick-latherin; Mercirex Soap, then rub well with }vfer- Destroys odors instantly. And oh how comfortable your feet will feel, MERCIREX CREAM §O¢ Soap 35¢c 3 for 1.00 THE BIGGEST VALUE IN TOWN The New GOLD-PLATED “Million Dollay” Valet AutoStrop Razor COMPLETE WITH STROP AND 10 VALET BLADES nd ready relief and invention through stages. Does Things Through Tube. Technically described to the writer by the inventor, the set “consists essen- tially of a selector, by which the desired gignal is ;\;tere;l from an ord&nsry an- e signal passes through a radio frequency amplifier, wherein it is amplified to the proper degree for The detector is substan- tially straight-line, and possesses the sensitivity of the grid leak and con- with - the quality and power handling capacity of the negative ‘C’ tenna. detection. denser, bias power detector. “However, utilizing neither grid leak, condenser nor negative ‘C’ bias, it ac- complishes something never before ac- AMERICA'S GREATEST DRUG STORES | CUT PRICES EFFECTIVE EVERY DAY At Liggett's When youbrush your teeth with KOLYNOS it foams! This cleansing foam floods your entire mouth with freshness— and kills the germs that cause decay. Tryit! 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RELIEF FOR NERVOIerS PEOPLE om Nervous Headache Nervous Exhaustion Irritability Car Sickness and Similar Nervous Disorders Sleeplessness 1.00 Size 95¢ the leasant effervescent tablets mygu‘ll be surprised at the pro- how gently they soothe your deranged nerves. Money back if not satisfied. Dr. Miles' Medical Co., Elkhart, ind. its developmental fe snd eure. § C., FRIDAY, SEPTEMBER 27, 1929. complished with a vacuum tube detector. “The detected signal is passed into a poler amplifier. The audio amplifier, which raises the detected signal up to loud-speaker volume, is capable of ex- tremely high quality reproduction, due to the fact that no transformer or re- active couplings are employed. The only transformer in the entire apparatus is the output transformer between the power amplifier and the loud speaker, which is of the ordinary dynamic type. “Five stages of radio frequency am- plification are utilized, together with a detector followed by two stages of audio amplification. “The tubes are of entirely new design, in accordance with the new principles. ' The usual tubes cannot be used In the apparatus, nor can my paratus.” Riggs system is its elim amplifier circuits, patent witnessed the demonstration. 1715 Pennsylvania Ave., near 17th 908 F St. N.W. 12th & G Sts. N.W. tubes be used in any other radio ap- Acts on Positive Bias, The most radical departure in the ination of the necessity of negative grid bias, hereto- fore r garded absolutely essential in all rights on which are tightly held and guarded The inventor revealed that his system uses a positive bias, accomplishing what has been considered technically impos- sible. That positive voltages were shown on a voltmeter when applied to each tube in the system can be attested to by the writer and by the engineers who Amazement was expressed when this was vealed. oth known accepted circuit. Office. d. high quality of the reproduction, | whi ‘« t About 40 patent applications, Invulv-s ing several hundred claims, have been | filed with the United States Patent | “The inventions of Dr. Riggs in the | operation and use of electron discharge devices,” sald Mr. Kenyon, “have been | departure from what has been consid- | developed along fundamentally new and | ered 4 virtual dogma of radio deslzn;’radlcnl principles. Application for let- ters patent in this country covering hese inventions have been filed by us, compared favorably with three|on which we believe basic pstf‘nuyw“i;) well known high quality receiving | be issued. 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