Show BEACONS FOR NIGHT FLYERS i y r s. s r Y Yr r Ir 4 e f- f 4 1 v Q I t k I I Ip p i y fu t j DIABLO C 14 j L r Fr f v LP Lh ti IM I'M p o k I an aD aid to aviation and the de de- Dment of ot night flying the Stand Stand- Oil Company of ot California Is build build- what hat will be the two highest ered incandescent electric beacons th the one on to be placed d on of Mt ar Ban San Ba Bay and the other In to the eed ced d Hills Hili Lot Loa Angeles These bea- bea develop ten million candler candle- candle Ir er r and the flashing beams beame from fromi i be risible to aviators for tor torr Tees r and ISO miles The com com- Ihu ku taken this action at the lug Bug row of ot the United States Depart Depart- Dt Gf t Commerce the Airways DiIo Di Di- I Io Ion of which Is 18 now engaged in Int In In- list t lights to 10 mark the airways m ID Los MS Angeles to San Francisco d from Los Angeles to Salt Lake f 1 The Department of Commerce Is o Projecting a series erles of lights northa north north- a rd d and Dd eastward from San Franco Fran- Fran co er as Indicated In the chart above se official airway lights are set frequent quent Intervals and are of ot three MW candlepower each M k M he be government will win give gle the light lighten Diablo the official SD 6 en designation stunting for standard and Sf l t Loa f Stand os Angeles in for the light In the rod reed Hills lit b blight light I t for type of beacon 1 the Sperry Gyroscope Co Is Isy by y large 1500 li watt 1500 watt In Incan Incan- can can- i I r A rI A f LOS ANGELES MERC MERCED D HILLS Q SL f f t f t. t j. j CO- CO 1 I f t. t X y f fk r k kI I NT I JAN IM tit OVAL ASSEMBLING f OIL AVIATION NACO IS WOLD- WOLD me eNe WATT LAMP WHICH 05 Vt LOPS T H MILLION CANDLE CANOLL INCH Si-INCH AT AND Sa INCH UNS LINS AT liT A HIOWT HAUL AN f I descent lamps especially manufactured manufactured for the purpose The reflector and lens of the beacon are 36 Inches In diameter The light Is equipped quIpped with an Ingenious device de holding two of the incandescent lamps one lamps one directly direct direct- ly Iy In front of the focal point pont of the tile reflector In the event of ot this lamp burning out the second lamp is automatically automatically automatically auto auto- thrown over o to take the place of the one lne that has gone Jone out This Is la done almost Instantly so that there Is no Interruption In the operation operation operation opera opera- tion of If the beacon The beacon be Itself makes six complete revolutions re per minute An automatic astronomical clock turns the beacon on at sunset and ort oft at sunrise This clock auto auto- compensates for the constantly con on- changing hours of ot sunset and sunrise The beacons will be mounted on foot 75 steel towers The symbols SD SI and SL SLi will be hung on the side of the towers as a mark of Identification tion In letters twelve feet high outlined outlined out out- lined In neon lights These lights complement the existing existing exist exist- ing e system stem of airway signs which the Standard Standrd Oil Company maintains at some points on the Pacific Coast These signs are aro painted on the roots of ot Its warehouses and give the name of the tile town in which located They can be road read by aviators at a 4 height of at several thousand feet |