F. H. Richardson's bluebook of projection (1942)

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638 RICHARDSON'S BLUEBOOK OF PROJECTION of Figure 224 to cut-oflf. (Thus the scanning beam is broken while it "flies back.") When the beam is restored the charges on the deflecting vanes are such that the beam-tip begins a new cycle of scanning the fluorescent surface. The foregoing is, of course, only an outline of the requirements of radio and television transmission. Some details of the receiving apparatus used to meet these requirements now will be described.