Device comprising a cathode-ray tube for producing a signal delay

836,446. Cathode-ray storage tubes. PHILIPS ELECTRICAL INDUSTRIES Ltd. Feb. 15, 1957 [Feb. 18, 1956], No. 5238/57. Class 39(1). [Also in Groups XL(b) and XL(c)] A C.P.S. storage cathode-ray tube with a semi-conductive target 9 is used for generating a signal which consists in the difference between an input signal S(t) and the input signal S(t-T) laid down as a charge image during the previous scan, an interval T earlier. The input signals are applied across resistor 3 to the cathode 2 and the output signals taken off across resistor 11 from signal electrode 10. Battery 12 supplies a voltage to the signal electrode exceeding the maximum amplitude of the input signal so that an element of the target shifts positive between scans.