Patent GB-1049553-A (GB)
Title: Method of and apparatus for filming optical-acoustic scenes
IPC: G03B31/04
Filed: 1965-05-17
Abstract: 1,049,553. Combined cine and television camera apparatus. BAVARIA ATELIER G.m.b.H. May 17, 1965 [May 15, 1964], No. 20657/65. Heading G2E. A method of shooting optical-acoustic scenes with at least one sound recording apparatus, a number of combined film and television cameras, monitors for each television camera and an additional monitor which can be connected at will to any of the television cameras, the sequence of shots to be taken being selected in conjunction with the monitors by switching over of the additional monitor (cutting), and the film stock passing through the film position of the newly selected camera taking the chosen picture sequence being provided with notches during the period in which the additional monitor is connected to it. A frequency is applied to the sound recording apparatus which identifies the camera selected. The cutting is carried out by the following automatic operations:- (1) The film portion of the newly selected camera starts to run. (2) After the film portion has run up to speed, say in 200 milli-seconds, the additional monitor is switched over from its previous camera to the new camera, notching of film in the previous camera ceases and starts in the new camera, and the frequency identifying the previous camera ceases to be applied to the sound recording apparatus. (3) After a time lag of say 20 milliseconds the frequency identifying the new camera is applied to the sound apparatus. (4) After a time of say one second after switching over the additional monitor, the film portion of the previous camera is switched off. The above sequence of operations takes place on the actuation of a single key for each camera at the control console, or a common cutting key may be used. A further key is provided which allows control of each camera independently of the console. The control circuit is transistorised and provides operating pulses for the switching sequences. Each camera has an input circuit comprising two nor gates in series, the input circuit including at least one by which it can be momentarily connected to a voltage and including a feed back connection from the output of the second nor gate to the input of the first so that, at the output of the second gate, the film portion and the associated equipment of the associated camera and delay circuit common to all cameras are connected. At the output of the first nor gate there is connected a one-way delay circuit so that the outputs of the first delay circuit and of the one-way delay circuit are linked to the connection, via a locking connection of two seriesconnected nor gates, there are connected devices for switching on the additional monitor and for switching in the film strip marking means and the characteristics frequency feed. At the output of the first nor gate there are connected the input terminals of a further delay circuit at whose out put, de-coupled from the output of the second nor gate, there is likewise connected the film portion of the associated camera. The output of the input circuit is thus connected to an input of the second nor gate of each input circuit for the remaining cameras, and the input of the locking circuit is connected to a respective input of the second nor gate of each locking circuit for the remaining cameras. The one-way delay circuit above comprises an RC circuit in which the resistance is shunted by a diode. Full circuitry is described.