Show Light Ray Advocated as Perfect Burglar Alarm A new Invisible li ht ray r burgl alarm for tor which striking claims are made m has hns just been added the varl oils ous devices Ices designed to mike make that profession thoroughly precarious he 1 he device de known is es the Seeing lachine was wis 13 demonstrated recently at the Technical High school In Ber before an on audience w which pro pro- pronounced pounced It to be the most reliable assurance against e l From a trin transmitting mittin apparatus filtered mfr infra red light lI ht rah rage are arc cent ent out a n receiving according ne ac according cording to a United Pre Ire s or cor- cor description de Between the transmitter it t one oue end of the room or chamber where here the de device Ice is In Installed Installed stalled and the receiver an arc of lIght is created But hut since the ra are to the human hum eye the light area are cannot be perceived percel Should hould a burlar bursar enter this tills light n r rare are arc aret i an alarm is set In mo mo- motion motion motion tion The lic-ht lic li ht rev riv apparatus is said to work orl whether the room In It Is installed Is In darkness or In light In or order er tint th fal false e alarms Shall not be given I en mice mke or rats enter enter- enterIng entering entering ing the ht area the apparatus Pl Is o devised deuced lle 1 ed that only objects of ot n a ertain size bring it into action The apparatus can cin n also 31 0 be used u ed as a fire alarm since Ince i a of smoke smote enter enterIng Ing ng the light ray area operates theil the it inn |