Show L BEACONS FOR NIGHT FIL FLYERS I y 51 tt y f wm i fr- fr r A tY r 4 L w wry ry f J 0 SACRAMENTO U be C CORD 4 MT D It sir rr C CO Y LIViNGSTON T a e v IC rr St D LLA N fRESNO v L 4 iii a Z 1 r C VISALIA tea G GT T C a y t 1 b c 1 ti BARER w v vw w t ii r r. r a i 1 r- r flea r I I fp I I As an an aid aliI to aviation and the development de of night flying the Stand Stand- aril Oil Company ot of California Is building build build- ing what will be the two highest powered incandescent electric beacons In the thE one country to be placed on the summit or of Mt Diablo near San Francisco Bay and the other in the Mercell Hills Los Angeles These beacons beacons bea- bea cons will develop ten million candlepower candle candle- power md and the flashing beams from will bo be visible to aviators for tor between and anel miles The coma com pm has taken laken this action at the suggestion suggestion sug- sug of or orthe the United States Depart Depart- of Commerce the Airways Division Division Di- Di vision or of which is now engaged In installing in- in stalling lights to mark the airways r from olD Los Angeles to San Fran Francisco and from Los Angeles to Salt Lake City The Department of oC Commerce is also nho projecting a series of lights northward northward north north- ward and antl eastward rd from San FranciCo Fran Fran- ci ciCo co as indicated in the chart above lese official airway lights ate are set al frequent intervals and are or of three I million candlepower er I The government will give the light lighton on Mt l Diablo the official designation of S sn U standing for Standard and SL signifying Static Stant ar Los t-Los Angeles for tor the light in the theM M I rc reed ll Hills j he light for this type or of beacon I. I t by the Sperry Gyroscope Co is tu furnished by large watt incan incan- I I aJ aJr iii l r JAN nm Ii LOS ANGELES Il ELES MER MERCE D ILLS Q s L r 1 r y If p no 1 r saN DICCiO ASSEMBLING ST STANDARD OIL AVIATION BEACON I WORKMAN lS IS HOLDING HOLD HOLD- INS ING WATT LAMP WHICH DEVELOPS TEN MILLION CANDLE AT LEFT AND INCH LENS AT RIGHT t I NAI STUD oS t iI descent lamps especIally manufactured manufactured for tor the purpose The reflector and lens of the beacon are 36 inches In diameter The light Is equIpped with an ingenious device holding two of oC the Incandescent one lamps directly direct direct- ly Ir in front 0 Of the focal ocal point of of the reflector In the event of this l lamp mp burning out the second lamp is automatically automatically auto auto- thrown over to take the place of the one that has gone out This is done almost instantly so that there is no interruption In the operation operation opera opera- tion df the Ilie beacon The beacon itself makes six c complete revolutions per per minute An automatic astronomical clock turns the beacon on at sunset and oft off at sunrise This clock alock auto auto- compensates for the constantly con con- changing hours of sunset and sunrise The beacons wm will be mounted on aD 75 toot steel towers The symbols SD and SL will bo be hung on the tho sIde ot of the towers as as a mark of identification tion in letters twelve feet teet high outlined outlined out out- lined In neon lights These lights complement the existing existing exist exist- ing system or of daylight airway signs which the Standard Oil Company maintains at some points on the Pacific Coast These signs are painted on the roofs ot of its warehouses and ande g give e the name of the town in which located They can be road by aviators a heIght ot sevel thousand feet teet I |