RADIO IN FILMS

Radio Record, Volume I, Issue 44, 18 May 1928, Page 3

RADIO IN FILMS

INSTRUCTIVE KINEMATOGRAPHY. At a recent meeting in Melbourne the members of the Wireless Institute of Australia (Victorian Division) were shown two educational films prepared by the General HElectric Co. One showed by means of pictorial diagrams the way the current flows and the action set up in a transmitting or receiving set of standard design. By means of dots and arrow-heads, which "moved" along through the coils, con- | densers, valves, ete., the action is built up step by step, the dots representing the electronic flow. The grid action of the valve was quite novel, the grid being represented ° as. a shutter or a Venetian blind. which, by its opening and _ closing controlled the flow of electrons from the filament to the plate. Movement of Electrons. The second film was designed to explain simply the theoretical structure ofean atom of matter, and the movement of the electrons round the central nucleus of any atom of matter was shown very clearly, as well as the arrangement and rearrangement when two elementary atoms are combined. The "sereening’ was arranged for by Mr. G. Il. Neve, of the General Electric Co., who also exhibited to the meeting some new apparatus of recent design, with which he discussed the tendency in modern receiving equipment.»