Evening Star Newspaper, May 16, 1922, Page 21

By JIC\kV Wilson Copmrigh, 1922, by Tho MoChue Nowmpape Syt " RADIO RALF— IREVISING RULES TOPROTECT RADID] Burea.u of Standard's Takes Steps to Prevent Fires From Crossed Antennae. A tentative revision of the national | electrical fire ‘code, , contdining in- stallation rules to prevent fires from.| lightning and crossed antennae wires, has been made by the radio laboratory of the bureau of stand- ards. The revision, as né: bli together with amplifications later t5 be determined, will be made perm ".’IEIY: I!lelinS(:;:ember b A e - principal. provisions alread: are in offect, and fallure to observa them may result in loss of insurance. > Matn Features of Revisie Some of ‘the main featur: 3 revised Failes follow : s Antennae:outelde of bulldings shall 1 TOLO THE TELEPHONE FOLKS THEY MIGHT A9 WELL REMOVE THE SWICH- BOARDS | —Now THAT ALL THE Givs Il WEAR BOSBED -HAR!! THANKS UADY, SEZ I, BUT I DoNT DRNK ANY THING- BUT BLACK COFFEE . SINCE'T LOST ME FORTUNE =T'M N MOURNING-! Poslam Tl imost instaritly tienare asually fading: Bealing lias reslly Yet Posiam is 80 gentls that it cannot injure the &0 * CNORWOOD 1 argest holes inthe-board, with their|tone and soprano (Jscobi); “Indian|3YN—National Radio Institute ¢300|tette of Newark, Sidney A. Baldwin, RIGHT? For loss of appetite, sluggishness, sick headaches and other complaints Tesulting from derangement of the Blood. Kidney and Liver, there is no remedy to excel JONES' VEGE. TABLE HERB TABLETS. _Thon sands of sincers testimonials. PURI LY VEGETABLE. _therefors per. fectly harmless to the most delicats constitution. TRY IT—your money Tefunded if not satisfied. CHRISTIANI DRUG CO. Ninth St. and Pa. Ave. CORD TIRES ,EAS;O'I"‘E—RMS : ““Pay for ’em as You use ’em ARANTEED QBALITY CORD TIRES ONLY T.0.PROBEY C0. 1230 Wis. Ave. N. W. Phone West 13} not cross over or under electric ligh or power wirés of any circuit of mgr: than 600 volts or railway trolley or feeder. wires, nor shall it be so lo- cated that a failure of either. anten- nae or of the above mentioned elec- tric light or power wires can result |in a contact between the antennae {and such other electric light or pow- | er wires. _Antennae shall be constructed an {installed -in a strong and Sarable manner and shall be so located as tpgh;:revsnt accidental contact with ight and power wi light aud b res by, sagging or | Splices and joints in the antennas »span. unless made with approve clamps or cing clamps of splicing devices, shall bs Lead-in wires shall be of copper, approved copper-clad steel or' other approved metal which will not cor- rode excessively, and in no case shall they be smaller than No. 14 B. & S. gauge efxcept that approved copper- clad steel not less than No. 17 B. & S. may be used. Lead-in e on- the outside of buildings shall not come nearer than four inches to electric light and power wires unless separated there- from by a continuous and firmly fixed non-conductor that will maintain per- manent separation. The non-con- ductor shall be in addition to any in- sulation on the wire. Lead-in wires shall enter the build- ing through a nom-combustible non- absorptive insulating bushing. The protective device shall be an approved lightning arrester, which will operate a potential of 500 volts or less. g The ground wire may be bare or in- sulated and shall be of copper or ap- proved copper-ciad steel, Preference shall be given to water’ piping. Gas piping shall not be used for groun ing protective devices wherevér the ground wire is con- nected to ‘pipes or piping. Wires inside buildings shall be se- curely fastened in a workmanlike manner and shall not come nearer than two inches.to any electric light or power wires unless separated there- from by some continuous and firmly fixed non-conductor making a perma. nent separation. This non-conductor shall be in addition to any regular in- sulation on the wire. Porcelain tub- ing or approved flexible tubing may be used Jor encasing wires to comply. with this rule. At transmitting stations, when the I current supply is obtained directly from street mains, the circuit shall be installed in -approved metal conduit, armored cable or metal raceways. If lead-covered wire is used, 1t shall be protected throughout its length in ap- | proved metal conduit or metal race- ways. T¢. is: desirable that:electrical con- struction companies install radio an- tennae and apparatus for persons who are not familiar with electric wir- ing. Antemnae Material. The size and material of which the antenna is made should depend, to | BY A. HYAT VERRILL, Expert en Radio Technology. 1 have already described how wire- less or radio waves carry sound waves through the ether and which, by ‘means of the recelving instru- ments, are caught and made audible to us. But & matter which puzzles many persons is how one message, one voice or one plece of music may be heard by the wireless telephone {without it being confused and jumbdled with all the others which are rtavel- ing through the ether 'at the same time. Even though a person knows that this s accomplished by some mysterious method known as “tun- ing,” and which is brougt about by turning certain numbered kuobs.or dials on the. receiving set, still the reason_and-principles remain a mys- tery. Without going into & long ex- planation ‘or ‘talking in technical terms, it is.very easy to make this Every wireless or electromagnetic wave hag a definite length, which is expressed in meters. This does not mean, 3s rome people think;: that the ‘waves travel only so many meters from the sending statian,.for the tini- est wave sent out by ‘an ordinary spark coil or buzzer probably travels completely. world. The - Expert Advice on Radio ] Article 2.—How Detector Cuts Wave. Y= o ) 1 i { l} mains constant, which may be rather a difficult thing to understand, But it we again compare them to water waves'and look at the diagram, Figure 1. it may readily be under- stood. When we cast the stone 'in the pool the waves appear much larger and closer together near the splash than when they reach the shore, and yet the length of the wave is the same. The apparent change is due merely to the fact that the waves flatten out, apd wireless waves do practically 'the same thing. In the illustration A represents a wave as it starts from its source, while B, C, D represent the same waves, or others of the same length, at varioys dis- tances, Althouzh they appear of dif- ferent lengths, yet in reality they are all precisely the same size, the only diffcrence being that they are flat- tened out or have become weaker. Hence it is not the waves which de- crease, but theit strength. No matter how weak or how strong the waves may be, however, you cannot receive them unless your instrument is ad- | justed to gheir wave length, and this adjustment s what is knowp as “tuning. When you “tune” a receiving set to eliminate all messages save those you wish to_hear, you merely adjust the aerfal and the set to record or pick up messages or sgunds carried on waves of a certain ldngth. “Brother” Waves Annoying. The nearer alike in wave length around wave length means merely that. the oscillations, or back and forth. waves, set up are of 4 certain size, and has very little: connection with. the distance at which they may be- re. celved. This depends upon the gens! tiveness of the set, and “if suffi- P! nsltive set could be made the tiny waves sent out by the ordi- nary spark coil or electric door bell could ‘be madé audible half way around the world or more, and the reason the big transatlantic sending stations ton; that greater energy 1 them,- and they. are stro; traveling great distances than: short waves. 3 3 Z Ripples of Waves im Alr. It is on the same principle as the waves in the water, which I have al ready described. Although the smill~ est ripple, by a tiny pebble will" eventually reach the shore, yet they may be invisible, while larger wave; caused by a large stone may readil: be seen. it 1mn;¢ llllll:-ulli-eh- .18, ita throw.ihe large. toneé an lues the large wave 80 more electtical energy is needed te- start long wireless waves.. Neither does the length of a wireless wave travels, as many imagine.. Although they become.weaker, the Tength J nee a | ers. the various sound are the more diffi- cult it Is to tune them out, and it two of the same strength wave length were coming from the same distance it “would be impossible to separate them. Usually the wave length varia- tlon of receiving sets s limited. which makes tuning easier, as the long. waves of the big stations pass by without affecting the set. This may seem inexplicable, for at first thought one would imagine that these enormously long_and powerful waves would be the first to be re- ceived and would drown out all oth- But it is really very simple. If ‘e have a board perforated by a num- ber of different sized holes and number of marbles of zes over the board, the big marbles will pass over the small and medium slzed holes; the medium sized mar- bles will drop through the large and ‘medium sized holes, but will pass over the smaller ones, while the smallest marbles will drop through all the may, therefore, compare receiv- to the perforated board and the wireless waves to the marbles. 1In the same way we may compare the |'short aerials or amateur receiving stations to the medlum and small z8d holes in the board and the long aerials of the big stations to the long waves representing the big mar- bles, the medium sized waves of the broadcasting stations _representing the medium sized marbles and the short waves of amateurs representing { the, smallest marbles. Big Waves May Pass. Hefice, witli' an ordinary aerial, the big waves of :the large stations pass by withoyt dropping in, 80 to speak, and broadcasting ocaught. But, un- like the perforated board, the tuning deyices of the recelving set permit the size or length of the aerial to be varied so that only waves of definite lengths are picked up. although just as the tiny marbles insisted In drop- ping through the medium sized holes, so the short amateur sending waves will drop into the set and pr a great nuisance unless the tuning de- lvlce adjustment is 'y delicate. In- | deed, were it not for the fact that these “are coml%lruively weak and faint they’ would prove & great nui- nnce.‘bul with a set equipped with devices for regulating sensitiveness or capacity as well as wave lengths, even these allest waves may be eliminated or‘tuned out. 80" you see the efficiency of a re- celving set-depends upon three things The size and character of the aerial, the meeuracy and range of the tuning device' and the ‘sensitiveness of the instruments. ‘And as ‘the aerial is the first thing to consider; we will take up the ques- tion of these important devices in the next article. : (Copyright. 1922.) Next Article: On the Use of Aerials. ! | BY RADIO TODAY NAA—Naval Radio Station, Radlo, Va. 10:30 a.m.—Meteorological report on 5.950 meters of arc transmitter. 12 noon and 10 pm.—Time signal, followed by weather report and ship orders. . 10:30 p.m.—Naval press news. Wavp length, 2,650 meters. WWX~—Post Ofice Department. 10°a.m.—Weather report for the Dis- trict of Columbia, Pennsylvania, Ohio, on 1,100 meters. 2:15 and 3:30 p.m.—C. marketgram telegrams on 1,980 me- ters. 5_p.m.—Wholesale dairy report on 1,160 meters, by radiophone. 7:30 and 8 p.m.—Market report op 1,160 meters, by radiophone. 9:50 p.m.—Weather report. ‘ WMU—Doubleday & Hill Eleetric Co. (360 meters). 4:30 to 5:30 p.m.—Base M(':L scorés announced: “Sultano A Te" (Cardifer- ro-Fucito); __“Impromptu, piano (Arensky): “You Are Free barri- 10:31 veget. 12:34 Lament,” violin (Dvorak-Kreisler); “Amaryliis,” piano; “La Traviata,” so- prano (Verdl); “Perpetual . Motion,"” plano (Weber); “Mandulinata a Nap- ule” (Muroio-Tagliaferro); - Noc- turne,” plano (Chopin); “S8amson and Delilah,” contralto (Saint Saens); “Ara- Bon.” plano (Alleniz); “Cantl Mod- erni” (Quici-De Donato); “A Canzona 81 Ttu" (Murolode Curtis); “Tales of Hoffman,” plano (Offenbach); base ball scores announced. WJH—~White and Boyer Co. % Meters). p.m.—Addre, C. American Hawaiian “Hilo,” Hawallan fox trot medley, “April ‘Boo Hao Hoo, Soprano solos: “Deser ed.” “Now Sleeps the Crimson Petal, “AuvClaire de la Lune” “Lci Basl” Miss' Junfe Cornwell, soprano; Mrs. Harry Jones, accompanist. “Three O'Clock Morning”; one-step medley, Me With a Smile,” “Angel ‘Tén Little Fingers and Ten Litti Totw'; walts, “Gypsy Love Song.' nor solos: ‘“‘Macushla,” ‘I Hear You Calling Me,” Joseph Anthony son, tenor. Contralto solot Message,’ Time of Roses,” “Mighty Lal (Vale), Mildrea de Hart; Albert W., Harned at the piano. Selections by Irving Boernstein’s Washington Hotel Orchestra: (a) Fox trot, “Jimmy" (b) fox trot, “My Sweetheart”: (c) fox trot. “La La Lu”; (d) saxophone | solo, O Sole Mio,” played by Mr.| a Rose" n Davi | Profession,” saxophonist; Mr. Milton ] los: Selection by Boern- Washington Hotel Orchestra, fox trot, “Cutie. —F MoAES OuY SEEI TR AL Metern). 4 p.m.—Radio spark code. 6:30 to WVP—Sigral Corps, U. Meters). 8:55 p.m.—Instruction in radio. 9 p.m.—Program of music. WWZ—Wanamaker's, Meters 1:40, 5:40 and 10:30 p.m.—Music and children’s stories. . s AL N. Y. (360 KDKA — Westinghoune. (360 Meters — Enxtern Time). 9 to 9:15 a.m.—Music. 1 a.m. to noon—>Music. 2:30 p.m.—Results of all base ball games by innings. 6 p.m.—Base ball scores: theatrical features; weekly dress talk 6:45 p.m.—Special news: govern- ment market reports; summary of New York Stock Exchange; weather report. . 7 p.m.—Talk on “Domestic Science by Miss Jean Fales, director of cos. Pittnburgl Standard league tume economics Carnegie Institute of | | | lecturd on by Mrs. Ford Pittsburgh Public Health Association; base ball scores. 7:30 p.m.—Bedtime story for chil- Technology ursing. Nursing | dren. § p.m-Sonata recital by Ralph Lewando, ~concert violinist; Julia Gibansky Kasanoff, concert pianist. 9:55 to 10 p.m.—Arlington time signals. WRBZ — Westinghoune, Springfield, Masx. (360 Meters—Eastern Day- light ‘Savings Time—Deduet Ome Hou 8 p.m.—Base ball ecores. Program of music by Mrs. William Cramer, soprano, and Howard Nichols, violin. rector. 9:30 p.m.—Concert by the police oc- 360 |, director. 10:52 to 11 p.m.—Official Arlington | time signals. 11:01 p.m.—Weather forecast. WJIZ—Westinghoune, Newark, N. J. | (380 meters—Bastern daylight saviags time—deduct one hour). « 8 am.—Agricultui reports _and prices as released by the New York and New Jersey and federal bureaus. 10 ‘wm.—Program of music. 11 am.—Program of music. Noon—Agricultural reports. weath- er forecast, program of music. 1 p.m—Weather forecast and pro- gram of music. 2 p.m.—Shipping news by the Ma- rine Engineering and Shipping Age. program of music. 3 p.m—Base ball scores for the American, National and international League games; program of music. 4 p.m.—Base ball scores, program of music. 5 p.m.-—Base ball scores, program of music. 6 p.m.—Weather forecast. tural reports, program of music. 7 p.m.—Final base ball scores, “Man “Children’s Storics, um. 3 p.m.— The Eyes of the World.” | by Winifred*Hathaway of the Brook- tyn Chapter of the Red Cross So- clet. 8 p.m.—Final base ball scores, con- {cert by the Standard Oil Band of New Jersey, Charles B. Biedeman, di- rector. 9:30 p.m,—Concert by the police oc- tette" of Newark, Sidney A. Baldwin, director. 10:52 to 11 p.m—Official Arlington time signals. 11:01 p.m.—Weather forecast. KYW—Westinghouse, Chicage. (380 Meters.) (Central _daylight _savjng (Continued on Page 22 time— [———— R e N AR T [ol—— o] ——=Ja[——=]q] LANSBURGH & BROTHER | Bargain 6th ‘Wednesday—A Marvelous May Sale Event—Presenting some extent, upon the length of the span which the antenna must bridge. It is suggested that for the ordinary receiving antenna, about 100 feet long. No. 14, B. & S. gauge, soft drawn copper wire, can be safely used. l The requirements for a protective device to be connécted between the antenna and ground terminals of the recelving set {s forithe purpose of carrying lightning discharges or less violent discharges caused by induc. tion or by atmospheric electricity to the ground, with a minimum chance of damage to the receiving apparatu: bullding or operator. Lightning arresters may be used inside the building, and in such case they will receive better protection from molsture and mechanical injury than lightning® arresters placed on the outside of a bullding wall. 5 —_— LESSONS IN RADIO CODE. Government to Conduct Classes for Amateur Operators. Amateur radlo operators in Mary- | land will ‘be given an “opportunity this summer to master the radio code, without which the usefulness of their outfits is greatly limited. Thb goverm ment has srranged to condust & serlcs of classes designed to enable the operators to use the code, with the same fluency they now use English.” The coursé will be sent Yrom the station of the 3d Corps Area quarters under, the direct supervision of Col. B. O. Uenolr, signal officer of the area. New Wash Dresses Imported Gingham and Best Quality Domestic Gingham 5449 The price is less than it would cost you to make Such Charmipg Dresses Skin Itches to the nearest drug zn:'l h’F—F Ointment and- | F-F ted Soap. , See how quickly relief follows. F-F Ointment is a wonderful Tem and when used with F-F M ed Soap it is the greatest combination for the clearing up of all skin dis- orders. It particularly good for cne, Psoriasis and Barber’s Itch—can be relied on to relieve Burns, Cuts and Ulcerat TR (LA WA L) I j————lo]lc———Jo[——]alc——]o[—=] The big point about F-F Oint- || ment and F-F Medicated Soap is that they can be absolutely relied upon. They will surely do what other remedies have failed to do. Your drug store has F-F Oint- ment and F-F Medicated Soap. Get them today. A generous sample free if you write us. Friedrich-Friedrich Chemical Co., Phila., Pa. LOOK FOR THIS We show just a few from a host of wonderfully attractive frocks for street wear—lavender, green, black, blue, pink and other beautiful checks—lace or embroidered collars with neat piping of gingham and other tasteful touches — regular and extra sizes. ‘ Helping Mpthél‘"Save.Daylight Every Day .- You can legislate the clocks backward or forward an hour : or so, but you can’t legislate kitchen work out of ex- istence. Since we can’t, let’s do all we can to-make it’less disagreeable and as easy as possible. ——— [o[c——]ol——lalc——]o[——] Let mother have more daylight to herself by putting a Hoosier_in her kitchen. Concentrating the -whole kitchen. eqiipment in one place will enable her to save hours each day, to say nothing of the thou- sands of steps. $ . And Now a Sale of the New Mercerized Poplin Skirts BE== A whirlwind purchase that sends our Skirt Sales soaring—two special : pricings, and there is no extra charge -~ for extra sizes. $3.50 & $4.50 Black, Rield Mouse, Copen, Tan and other sport shades—pleated models— =t 1 tailored pockets, .button trimmed— and we have both 7. s Though considered the best, Hoosier is the most moderate priced “kitchen cabinet. “¥our demonstration 'is scheduled :for tomorrow. = lnle= 1 /4 |