Show light ray advocated as perfect burglar alarm A new invisible light ray burgler alarm lor for which striking claims tire are m made n 6 ba liaa s i just us fai been en added chevar the various it devices designed to make that profession thoroughly precarious the device known is the seeing machine was demonstrated arcu recently at the technical high school in derlin derfin before tin an audience which pronounced it to be the most rel reliable lable assurance against burglary existing from a transmitting apparatus filtered infrared infra red light rays rays are sent wilt out toward a receiving apparatus according to a united press correspondents description between the transmitter at one en end d of the ro room om or chamber where the device Is installed and the rc receiver elver an area of light Is created but since the rays arts nry invisible to the human eye the light area cannot be perceived should a burglar enter this invisible light ray area tin an alarm Is set in motion the ray apparatus la in said kwork to work whether the room in which it Is IR installed Is in darkness or in daylight in order arder that false alarms shall not be given through mice or rats entering the light area the apparatus Is so devised that only objects of a certain maln size bring it into action the apparatus can also be used as a fire alarm since a cloud of smoke entering the light rny ray area operates the alarm |