New Britain Herald Newspaper, December 26, 1922, Page 3

e IMPORTANT DEVELOPMENT MADE IN RADIO DESIGNS AND MAKES IN 1922 General History of Manu- A new tube attachment for con- facture of Wireless Outs|veriing spark et ona g vacuum tube continuous wave trang- fits and Their Component | mitters, makes it possible for own. ers of spark sets to reallze the ad- Parts by an Expert. vantages of continuous wave transe | mlssion at a minimum cost. It has (By John Liston, General Electric g wave-length range of from 2,000 Company), to 2,400 meters, It utilizes the pow- er equipment and high potential . Important progress 'was made durs ing 1922 in the design and manutac- ture of radlo telephone and tele- graph apparatus, both for commer~ clal and amateur purposes. The sale of amateur equipment made a spec- tacular Increase, due to the suddenly U | ot only to carr J . i s | Y on communication Afgiava nterest iof the pblic In thelwish” stations now ' Hstening.tn - on new application or radio to broad- 2,200 meters, but to carry on com casting, | mu f ‘ s munie: e n 4 ange Wi le T atandard et campar) \\'Nhk:“?‘n ]!‘:\\:’r much greater ranges nent parts which had been originally Geslgned for commercial purposes was later produced for the amateur, Proadcast receivers were built, mak- ing use of thesc parts.and a liac o sectidnal units, such ds the tuning ‘unit, the threc stage radio frequency amplifier unit and the plifier unit was developed. The main idea in these sets was the production of receivers, each ‘of which serve a definite function separately, and could also be easily combined. The general tendenay. in receiving tubes was toward reducing the power consumption in the tube tector and amplifier tube using 1-4 empere in the fllamen; superseding one previously using one ampere. Tater a tube using only 60 milllam- peres for the filament was equally successful, These new tubes made it possible to use dry cells for the filament ex-| citation, and two new receivers were produced. One, a portable set, con- tains a sensitive tuning system, a de- ector and single stage audio fre-|the plate supply of the oscillator unit| "%, W0 08 MatrCd Negri's interlo- quency amplifier. The set is very|®nd & so-called '“tank circuit” by cufory decrce for. divorge = bedomes compact and light, particularly when [M€ans of which the transmitted wave final v considered from the point of view of [length is kept particularly constant;' =" performance. The other set is sim-|and free from undesirable harmonies, 1A 1itela | elgeteloal shiractertito k0 Parts for Navy. Warsaw, Poland, which is being buflt| circuits in the pipe framework are the first one, except that it has two stages of audio frequency amplifica- tion instead of one. A club speaker is part of the set; and this, the radio| apparatus, the tubes and batteries| are all arranged inside a cabinet, Broadcast Receiving. One of the interesting applications of broadcast receiving was the instal- lation aboard several Pullman trains of equipment for entertaining the passengers with concerts throughout their .journey and to keep them in- formed on such topics as weather, market and stoel reports. In the line of commercial equip- ments, new requirements were met, due in many cases to broadcasting. In one’case, a power company sought a duplex radio telephone installation with which it could provide during times of storm against possible inter- ruption of communication between|motely controlled antenna wave|[they are to be controlled. several of {ts stations 75 miles apart.|change switches and remotely con-| In the operation of remotely con- At the same time, signals from near- |trolled antenna variometers. trolled antenna variometers for in- by broadcasting stations operating on/ One of the antenna tuning in-|door service, means for remote con- 360 meters were not to interfere with (ductances designed for outdoor serv-|trol from switchboard and.hand con- ration of this station on the'only| aVailable wave length of 400 meters. The set was to be operated through remote control from a desk stand by the regular power house switchboard operators and to require no attention except that usually given to such moving parts as motors and generat- ors. This set was designed and in-| stalled and is operating successfully. For the use of amateurs and for detector-am- | would | filaments, | The first attempt resulted in a de-| rupted continuous wave, Continuous Waves, | mately % transformer of the spark transmitter | and includes necessary switehing ap- can | be transferred from the spark set to | paratis so that. communfeation the tube attachment, This equipment spark transmitter, During antual service tosts conducted | with one of these thansmitters, a | range of 1,600 | water, was realized An aircraft transmitfer was con- structed for telegraph communication only with a continuous wave output ‘In the antenna of 300 watts. Provi- | sion was also made for interrupted | continuous wave telegraphy, The | transmitter was designed to operate from a double current stream line generator driven by an automatic speed regulating propeller, Two telegraph transmitters having outputs of 2 and 4 KW respectively, into the antenna, were produced for installation in Mexico, They are the first sets to include the method of construction which has now been adopted as standard for medium pow- er tube transmitters, and are a radi- cal departure from vacuum tube transmtters previously built, Each equipment includes a keno- tron rectifier which supplies the neces- sary high voltage direct current for A number of telephone and tele- graph transmitters were built for in- stallation on submarines of the U. §. navy, which include many novel fea- tures of construction and operation. They are designed for transmittin, either ‘on the flat top antenna or a loop and include a break-in system whereby the operator can listen-in be- tween dots and dashes of the trans- mitted message; they are available for three methods of communications and |have an output of 600 meters con- tinuous wave in the antenna. The complete equipment was extremely re- stricted in dimensions on account of the service for which it was built. New apparatus designed and manu- factured for use with 200K'W Alexan- derson alternator equipments consist- ed of antenna tunning inductances, re- ice installed at Radio Central station, has a coil composed of ten vertical supports on 82 inch diameter centers, of 3% inch outside diameter and are held semi-rigidly by cgpper rings on the inside of the vertical tubes, Attached to each of the ten vertical supports are 14 spacing blocks which ! are so designed as to provide a maxi-| an output in the antenna of approxi- KW continuous wave and makes it possible miles daylight, over Are The L Despite continued Negri and Charlie stars, shown above, Chaplin, rumors y? Are They Not? silence of Pola sereen persist they will be married soon after Jan, | ’ i‘i 57 R e oom BRITAIN DAILY HERALD, TUESDAY, DECEMBER 26, 1922. ca. general design, cxcept that six verti- cal supports on 65 inch diameter cen- ters are used, is being furnished the radio corporation’s station Bolinas, California. On Switche: change switches are to be mounted adjacent to the tuning inductances described above, and “will be used to change the number of active turns in the inductances. Then of these switches were fur- nished with the two alternator equip- ments for the Polish station. gThey will be located at various distances up to more than a mile from the gen- trél at the variometer tvere provided tuned antennae. They are used Porcelain supports are used throughout for all parts connected in |mum surface-creeping-distance be-{ circuit and the conductor is com- installation on small boats and yachts|tween turns. | posed of 4,270 strands of five mil cop- there was produced a small radlo| The conductor which is wound .in| per wire, each strand insulated with telephone transmitter having an out- from a kenotron rectifier which was designed for,this equipment. It can also be use® on telegraph transmit- o from the weather. The total induc-|any kind are used inside the wind- | Therefore, as the film is moved in ter either contifivous; wave or inter-|(,ice fg 19 millihenries. ings. The top supports of the frame- | this device, the electric current is SEEEE————EE— Ten of these coils were furnished|work are of brass. Iron pipes at-|actuated which corresponds with FIERY, ITCHY SKIN with ‘two 200 KW alternator equip- ments for the new radio station near treated braid on the outside provide insulation and protect the conductor tained high . : grooves of the spacing blocks is of |enamel. ~ Varnished cambric and put of 20 watt in the antenna. It 18|Ggg strands of ten mil diameter cop- |treated brald form the outside insu- built so that it can be operated|per wires, each strand insulated with | lation. o elther from a motor generator set orlenamel, Varnished cambric and| Due to the highsintensity, high- frequency electro-imagnetic field pro- duced by the windings, no metals of temperatures at frac- tional load in the windings. Cloged by the Radio Corporation of Ameri- Material for four coils of the same | for prevent circulating currents. parallel. broken up by suitable insulators. to The stationary and movable wind- ings may be connected in series The average range of or in- near Remotely controlled antenna wave | erating station, the point from which | These variométers are connected in series with 200 KW Alexanderson al- These supports are of porcelain tubing|ternators, feeding energy to muitiple to maintain close adjustment of antenna tuning, particularly when antenna ca- pacity is varied by wind and sleet. ductances in series connection is .19 | to 1.1 milli-henries. Maximum coup- ling averages 50 per cent. Pallophotophone. A new metho of recording and re- producing sound was developed, which is a distinct improvement in many ways over all previous methods used and opens up several entirely new fields of application. There are two distinct devices in the Pallophotophone,—one for re- cording and one for reproducing the sound and either may be used inde- pendently. The recording device consists es- sentially of a tiny mirror on which is reflected a beam of light. This mirror is attached to a delicately vibrating diaphragm and when sound waves cause the diaphragm toivibrate, - [the mirror oscillates and the ray of light causes projection of correspond- ing oscillations upon a strip of pho- tographic film which passes in front of the mirror in a continuous mo- tion. The film is then developed in the | usual way and shows a succession of ydelicate dark markings which con- stitute the sound record. Reproduced Device. In the reproduced device, the film passes in front of an arrangement of vacuum tubes which are sensitive to }light so that the variations in the | light falling on them caused by the lines recorded on the film, produce electro-motive force vibrations in the circuit in which they are connected. great accuracy to the original sound SALESMAN WEDS TWO, Treat Him to a Christmas Surprise made to actuate a telephone loud speaker or to operate radio broad- sting apparatus directly, Many interesting applications of this new device have already been made and a few possibilities can be, briefly outlined as follows: It makes possitle the talking motion picturs for on a film of the normal width, hoth sound and action can be record. ed simultaneously and projected with absolute synchronism, It is practic- ally unlimited as to the length of rec- ord it can make and reproduce and is, therefore, suitable for recording speeches, debates, concert programs, In the taking of evidence and for any purposes where a lengthy record of sound is required. It can be dupli- cated and used as a film photograph and applied in radio telegraphy in producing wireless signals and for audio amplification. It has already been successfully applied in radlo broadeasting. The Magnetron, The largest vacuum tube ever made conslsts essentially of a water-cooled cylindrical anode 30 inches long and 1% Inches in dlameter, In the axis of the anode is a tungsten fllament 0.4, inch in diameter and 22 inches! long. This fllament is excited by current of 1,800 ampergs at 10,000 cycles, the fllament excitation re- quiring about 20 kw. The magnetic fleld produced by this large hearing current is sufficient to cut ‘off the electric current from the cathode to the anode during.a portion of each half cycle of the current passing through the cathode, this action tak- ing the place of that of the grid in a three-electrode tube, 'The electron current to the cathode is thus inter- rupted 20,000 times per second. By the use of properly tuned circuits this can be used for the produetion of high frequency power for radio or any other purpose. This particular type of tube which is called the Magnetron, will supply 1,000 kw. of 20,000 cycle power at an efficiency of 70 per cent. oper- ating with an anode voltage of 20,000 volts direct current, Carrier Current. Complete carrier current equipment for telephone communication over the high tension transmission lines of power companies was developed and agnumber of sets were installed. The transmitter has an output of 50 watts and is rated at 75 miles, providing there are not a great num- ber of tie-ins or transformer stations in this distance. The equipment in- cludes a calling system whereby a bell is rung at the station called when the station calling actuates a push- button on the desk-stand forming part of the equipment. th th lea an. ga’ WOMEN TELL POLICE cel a By Having Him Arrested On Broadway. New York, Dec. 26.—When he was pointed out on Broadway, near 100th street, yesterday by two women, each of whom said she was his wife, Lin- ford H. Stockwell, 27, a salesman, who gave his address as the Normandie! hotel, Broadway and Thirty-eighth street, was arrested by Detective Roy of the Oak street station and locked up in police headquarters charged with bigamy. Helen Fallon of 121 West Ninetieth street says that Stockwell married her on July 27, using the name “Linford Remmick.” Vivian Goodwin of 200 West ' Eighty-fifth street declares that Stockwell under the name of “Lin- ford Koslin” married her on Oct. 16. Both marriages, according theswomen, were performed at the License burean at the City hall. Both women assert that Stockwell also married in Mil- waukee, The police say Stockwell ad- mitted having married in Milwaukes, but he sald that the marriage was annulled because the woman he mar- wave. This electric current can be (QUICKLY SOOTHED WITH SULPHUR Mentho-Sulphur, a pleasant cream, ‘will soothe and heal skin that is irri tated or broken out with eczema; that is covered with ugly rash or pim- ples, or is rough or dry. Nothing subdues flery skin eruptions so quick- ly, says a noted skin specialist. The moment this sulphur prepara- tion is applied the itching stops and after two or three applications, the eczema is gone and the skin is de- lightfully clear and smooth. Sulphur is so precious as a skin remedy be- cause it destroys the parasites that cause the burning, itching or disfig- urement. Mentho-Sulphur always heals eczema right up. A small jar of Rowles Mentho-8ul- phur may be had at any good drug store. - FOX'S - Next Mon., Tues., Wed. Get CUBA THIS WINTER. BOATS. INSET I8 C. Let it Freeze! Thesg Planes Find a Way to Keep A - Flying SANTA MARIA, LARGEST PASSENGER CARRYING PLANE IN THE WORLD, WHICH I8 PART OF THE FLEET LEAVING THE GREAT LAKES SUMMER ROUTES TO 1LY BETWEEN KEY WEST AND ¥. REDDEN, PRESIDENT OF TH ¥ FIRM OPERATING THE FLYING BULLDOG DRUMMOND Dead or Alive! on the ships of the alr, when it comes to tmaveling with the weather. All summer long, the Aeromarine Airways successfully operated a fleet of four 11-passenger flying boats be- tween Cleveland and Detroit, in com- petition with tNe Great Lakes vessels. Now the Great Lakes are closed to ‘passenger navigation for the winter— but the flying boats are still busy. RESERVED SEATS The birds of the air have nothing | | PALACE — Tonight As passenger traffic slackcneq in the north and people started south for the winter months, the flying boat fieet joined the geese and robins in their southerly hegira, and made their headquarters here. Regular flights have been instituted between Key West and Havana, Cuba, which were ushered in with much ceremony by Cuban government executives. “The flying boat as a “Our mea planes, 6—BIG KEITH VAUDEVILLE ACTS—6 Betty Compson and Bert Lytell in “TO HAVE AND TO HOLD” er Shoes, which are scientifically de- of |signed to help nature keep your feet quick, safe transportation is a per-|in good condition. manent fixture in America now,” de-|us explain the finer points of shoe- clares C. ¥. Redden, president of the |building. Aeromarine Alrways. cabin enclosed, are as comfortable as a Pullman, and as we have carried over 25,000 passengers without aceci- dent, insurance companies now issue special flight insurance to holders of our tickets." ried had used a fictitious name, that each had the same one. Broadway and 100th street yesterday INCORPORATED 257 Main St. OUR SEMI-ANNUAL INVENTORY] — SALE STARTS TOMORROW MORNING Our object of this sale is to reduce our stock and we have marked our prices down greatly. GREAT REDUCTIONS MILLINERY HOSIERY — GLOVES LADIES HANDBAGS | SILK ad WOOLEN SCARFS #Lk Hall was shot to death when he at- (tempted to arrest “Pomp” Allen, & negro who had engaged in an argu- The women would not explain how ey become acquainted, but when ey compared husbands they found They at ment with companions. Although fatally wounded, drew his revolver and killed his assailant, g Fd Lindsay, a negro miner, was killed in a revolver duel at Scottdale. arned that Stockwell was to be d, accompanied by Detective Roy, Uniontown, men were killed coal field Christmas e day. company’s police force, ve him a Christmas surprise. In Christmas Celebration Pa., Dec. during ebrations in the 1 Christmas county s and yester- One of the dead is Irank Hall, Frick Coke member of the H. C. Co., street, thjs city. BARRETT—KRUM, and Mr. Barrett at the Britain Machine Co. bleak, cold days? NONE SUCH MINCE MEAT “LIKE MOTHER USED TO MAKE"” MERRELL-SOULE COMPANY SYRACUSE.N.Y. o — Some Men Have Weak Feet of your feet. when you have flat feet, It's a to go fallen Be careful weary road through life with arches, etc. stan - How much wis.. .. wear Cantilev- Come in and let Sloan Bros. JOIN THE NATIONAL CHRIST S CLUB THIS WEEK And Save for Another Christmas . 185 MAIN STREET Thurs. Fri. Sat. 6—BIG KEITH VAUDEVILLE ACTS—6 Helen Chadwick and Richard Dix in “THE SIN FLOOD” A third negro was killed in a pitched | battle at Buffington. Four Men Shot to Death ‘ Mr. and Mrs. George Krum of 620 26,—Four Stanley street announce the engage- ' ment of their daughter Gladys, to: Russell W, Barrett of 156 East Main Miss Krum is em- | ployed at the Russell & Erwin Mfg. New:'