GB527912A - Improvements in or relating to systems for televising or producing a photographic record of a scene - Google Patents

Abstract

527,912. Television. BROWNE, C. O. March 16, 1939, No. 8374. [Class 40 (iii)] Relates to television systems comprising a plurality of television cameras associated with a control unit having separate means for controlling the picture signals fed by each camera to a common channel. According to the invention, the adjustment of these means is made automatically to close and open communication lines between the operator at the control station and the operators of the cameras. As shown, cams la, 2a, 3a are provided on shaft 1, 2, 3 operating fader switches at the control unit for picture signals for three cameras. When a camera is in circuit, the corresponding cam closes a corresponding switch 4, which operates a relay 10, closing a switch 11 establishing connection between a microphone 14 at the control unit and a telephone 13 at the camera. In addition, the closing of the switch 4 may light up lamps 6, 7 to indicate at the control unit and the camera respectively that the camera is in circuit If communication with all the camera operators is desired simultaneously, all the telephone circuits are closed by a multiple switch 15. The spindles 1, 2, 3 may have a small initial range of adjustment, enabling the switches 4 to be closed before the cameras are actually put in circuit.