Show Pictures Transmitted by Radio Declared Great Achievement w 4 4 r 3 74 i u uE E R Rc I c 4 4 I r 9 I I Aey 7 1 ti a f k y ya 9 p p 4 G t. t i 1 The Jenkins transmitting set at Washington D. D C C. The ra ray of light passes through the four cylindrical pris prisms s two of which rotate times faster than the other pan air PHILADELPHIA MarCh 17 17 1 electricity for the purpose purpose purpose pur pur- pose of sending pictures through the theah I ah a all a distance of miles was riles was accomplished here last Saturday for forthe the first time in the worlds world's history The Tha native city of TI Benjamin njamin Frank- Frank lIn first dis discoverer of electricity was the scene of this latest marvel of twentieth century ingenuity From a sending machine in the naval radio ladio station at Washington D. D C C. three photographs those photographs those of President Harding Vice President Coolidge and Governor Pinchot- Pinchot were flashed through the air and Instantaneously caught on the delicate delicate delicate deli deli- cate negative of a receiving machine machine machine ma ma- chine stationed in the office of the Philadelphia Bulletin Philadelphia Pa PaThe The pictures taken from the theair theair theair air were imperfect but were sufficiently sufficiently suf suf- clear and recognizable to astonish the group of prominent sut-I sut nt publishers and scientists to witness the demon demonstration The inventor of the process process was present and di directed directed directed di- di I. I the experiment He lIe is C C. Francis rancis Jenkins of Washington ashington who In 1898 received worldwide recognition recognition tion for the invention of the first I motion picture machine for which accomplishment he was awarded ed edthe the much sought Elliott Cresson medal upon recommendation of the Franklin institute PRINCIPLES PRESERVED t All AU of the principles of radio are preserved in the transmission of pictures An meter 1150 wave wavelength wavelength Ie length was used by the Washington on station Saturday In the demonstration tion The r receiving elving apparatus consisted con con- consisted consisted con con- of a detector and amplifying unit of oJ the type familiar to many amateurs Summed up the principle principle principle of transmission is transfer of I light Impulses into electrical Im Impulses Impulses impulses Im- Im pulses and thence Into radio im im- impulses impulses' pulses pulses' This Is done through a prismatic I plate a new optical shape In glass Invented especially by Mr Jenkins s which gives to a ray f light or or a a. picture beam passing through it a fixed axis on one side of the rotatIng rotating rotating ing plate and an os oscillating or hinged ed action on the opposite side of the tho plate Mr Jenkins describes the process as follows The sending apparatus employed I In transmitting pictures by radio consists of three parts First there is a a. device on which a photograph or photographic negative is placed and lighted The Image of the picture picture picture pic pic- ture is thrown by this light through four rotating prismatic plates These plates are ore circular discs of polished glass which overlap each other The light from the picture goes through the discs and is thrown on a cell sensitive to light which changes the high lights shadows and half tones of ot the picture picture pic plc- ture Into electrical vibrations Just Justas as the human voice is changed into electrical vibrations by the trans transmitter transmitter trans trans- mitter of the telephone I VIBRATIONS BECOME PICTURE These electrical vibrations are then Impressed on radio carrier waves t which broadcast them At Atall Atall Atall all receiving stations equipped with proper picture sets these electrical elec alec electrical vibrations are again changed into pictures That is the original picture is Js reassembled on a photographic plate line by line until the whole picture surface is covered The picture picture pic pic- ture Is then developed and dried and paper prints are made This recreates the e picture lre in duplicate of the original at the sending station There can can be as many photographic photographic photographic photo photo- graphic plates as there are places where it is desired to r receive elve these pictures The simplicity of If f the operation was Will the most interesting feat feature re of the historic occasion in the minds pi t those assembled to watch it The receiving apparatus contained in two large suitcases s and a trunk had been Installed on the tenth story of the Bulletin building It appeared like a big camera in fact It was nag a camera divided in two parts parti with the lens len's in Washington and the photographic plates In Philadelphia On one of the boxlike mechanisms was wasa a device m made de chiefly from an ordinary automobile headlight bulb Something analogous to a periscope was constructed on this a a. vibrating mirror whose whoso purpose was to re reflect reflect re- re the photographic rays of light Next a card was fitted over the lens in which a n. hole had been drilled about as wide as Da a pencil A black hair was pasted l lengthwise down the card Two Important factors factors factors fac fac- tors were that he hair ball had to be black and that it had to Just pass passover passover over the small opening PLATES TAKE MOTION The little party of absorbed spectators stood about the magical yet simple appearing apparatus I The room remained d light Soon a little star was seen through the hole tole ole It was vas S 8 o'clock and the navy mea had lord started accomplishing the once impossible im im- possible poss ble task of sending pictures through the ether A set of prismatic plates began to rotate The negative was placed beyond them Each of or the party watched the star sparkle brighter and brighter The sharpness sharpness sharpness sharp sharp- ness of the light set the air quivering ering cring and the quivering cast a shadow upon the tho opening The prismatic plates kept the ray of light fight moving slowly It p passed I I down the negative and ana continued to do eo again and again in parallel paral paral- lel lines a 0 fraction of f Preside an inch ie apart The rhe portrait of or President n Harding was traced on tho the negative There was a a. moment of or tense suspense when the tho picture was taken from the machine and shown to the assembled party part re relieved relieved re- re lIo by a feeling of or exultation when it was seen that tat the at test had not failed and that the he photograph thoUgh photograph though Imperfect was imperfect was really recognizable The imperfections imper imper- according to Jenkins the tho e Inventor enter are du due partly PoY to tho the static in the air all and other at atmospheric atmospheric atmospheric at- at disturbances and also also J to the fact that he be has not yet been able t to tb trap out entirely ordinary radio transfers some of which which which-in in the form of code dots and dashes imprint dashes imprint themselves on the negative From the pictures which accompany accompany accompany pany the article it can be seen how tho the first Impulses look as they are received on t the e negative forming wavering lines across the tho surface To make a satisfactory satisfactory satisfactory tory picture touching up Is necessary sar sary Jenkins claims that this fault will shortly be remedied and that even now no noon on short distances he can secure perfect results REPAIRED HARVESTERS Mr Jenkins has had an adventurous adventurous c career reer He lie was born near Dayton 0 O August 22 1868 went to Earlham college a Quaker in institution In- In in Richmond and at the I age of 16 left home for the Oregon wheat fields While there he be beI became became became be- be I came interested in the mowing and I reaping machinery and anti was soon an expert repairer or trouble troubleshooter troubleshooter shooter Later he roamed down I I into the panhandle district of or the Texas oil fields where he I I again applied his genius for meI mechanical mechanical me me- i invention to the mining alining machinery and oil well pumps in I addition to which he also worked u cattle cat i as a surveyor and pUnched I at-I t tle tie for variety 4 m Mexico o next attracted him and while there he received a telegram from his father notifying him of his appointment as a steno stenographer I in the tho United States treasury de department department department de- de at Washington He incidentally In Incidentally in- in had picked up stenography stenography stenography raphy while on his cross country t- t tours urs He Ho became beame private secretary secretary secretary secre secre- tary to S S. I I. I Kimball chief of the life liCe saving sa service now called the 1 coast guard service but resigned in 1895 1595 to take up research work I which led to his inventions Mr Jenkins is a typical Inventor inventors and he had an inventors inventor's h hird r luck He lie got the idea about how I to sen send pictures by radio years rears ago but he hg h couldn't work worl it out I His mind began to cloud after I application in let his laboratory day and md night He had to seek recreation recreation recreation tion and as is characteristic of 1 the man took up aviation a as a mental relaxation It was not until until un un- unI I til last May while flying in his I hydroplane ne high above Washington Washing Washing- ton that the final perplexing problem of his Invention became clear to him The difficulty was I the adjustment of the prismatic plates plates plate on his hla sending machine and ancl the lUe solution pI came o like an an In Inspiration in- in out cut of the clouds Mr Jenkins Jenkins' also claims that by bythe bythe bythe the use of his We new invention the day Is not far distant when movIng moving moving ing pictures can be sent in the same way as the present photograph photo photo- graphs graph Imagine sitting sitt at home as one does now listening to the radio and seeing the latest rive rive- I reel thriller projected on your our own private screen ALLIANCE VIEWS TEST The test last Saturday was held under the auspices of the North American Newspaper Alliance and t I among those who witnessed the I j epoch making event were George Hoadley and Dr Henry Leffman I representing the Franklin Institute of ot Philadelphia Benjamin Franklin Frank Frank- I Hn lin Howard S S. Levy Lionel FLevy F F. Levy William G G. Devereux Frank I of the tue I Philadelphia Fire Underwriters Underwriters' I association Miss Louise Virginia I I I Moore ane and Miss F F. L L. T. T Seabury all of Philadelphia I Representing the navy naw were I Lieutenant Commander J. J C C. Clark radio material officer of the II Fourth naval district Philadelphia navy naO yards ards and A. A R R. Sharples Sharpies I expert radio aide Philadelphia I navy y yard Major Loring Pickering Pickering Picker Picker- ing of the North orth American n News News- News p p Alliance Amance headquarters In New York John R. R Bone Toronto To To- Toronto Star Merton E. E Burke Bal Bal- Baltimore timor Sun Robert McLean and William I. I L. L McLean Jr of the Philadelphia Bulletin and J. J M. M Joy of New York Copyright 1923 by the North American Newspaper Alliance Inthe in inthe inthe the United States and Canada Reproduction Reproduction Reproduction Re Re- production in whole or in part expressly expressly expressly ex ex- pressly prohibited |