GB597081A - Improvements in or relating to cathode ray display systems - Google Patents

Abstract

597,081. Indicating vibrations. FISZDON, W., and JONES, R. P. N. Aug. 9, 1945, No. 20466. [Class 106 (iv)] [Also in Groups XXXVI and XXXVIII] Oscillations from different sources are applied successively to the deflecting plates of a cathode ray tube to produce juxtaposed traces across the screen which are momentarily brightened by a pulse of constant phase so as to indicate the phase of the oscillations. As applied to testing part of an aircraft, pick-ups la, I ... 6a, 6b, Figs. 1, 3, on the structure A, Fig. 1, respond to the vibrations transmitted from a vibrator C, and are each connected in turn through a commutator Y, Fig. 3, to one pair of deflecting plates of a cathode-ray tube and a commutator X gives the other deflecting plates a stepped deflecting voltage. The cathode-ray beam is momentarily increased in intensity at the peak of each cycle of the vibrator C by a contact H, so that the output of each pick-up is recorded as a line whose phase is indicated by the position of the bright dot, Fig. 4.