ARYEH Posted July 14, 2019 Share Posted July 14, 2019 Spectroscopic Optical Telegraph {The Morse Machine). Don't laugh it's not so simple as you'd think and was probably secure. www.britishpathe.com/video/the-morse-machine/query/morse ABSTRACT 489,357. VISIBLE SIGNALLING APPARATUS. BRUSCAGLIONI, R. OCT. 20, 1936, NO. 28534. VOID. CONVENTION DATE, OCT. 21, 1935. DRAWINGS TO SPECIFICATION. [CLASS 118 (II)] LIGHT SIGNALS ARE GIVEN BY FORMING A SPECTRUM AT THE TRANSMITTING STATION, STOPPING OUT PART OR PARTS OF THE SPECTRUM AND RECOMBINING THE LIGHT FOR TRANSMISSION AS A MIXED BEAM. THE PORTION OF THE SPECTRUM STOPPED IS ARRANGED SO AS NOT APPRECIABLY TO EFFECT THE COLOUR OF THE MIXED BEAM AND THE ABSENCE OF THE STOPPED RAYS IS OBSERVED BY SPECTROSCOPIC EXAMINATION AT THE RECEIVING-STATION. THE STOPPING SCREENS MAY BE OPERATED FROM A KEYBOARD AND THE RECEIVED SIGNALS MAY BE RECORDED BY MEANS OF A SPECTROGRAPHIC CAMERA. 1 Link to comment Share on other sites More sharing options...
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