The Talking Link (1936)

Item title reads - “The Talking Link!“ C/U of a hand dialling a number on a telephone, L/S as the camera speeds along the telephone wires. M/S of a long line of girls sat at a switchboard. M/S of the telephone apparatus with levers clicking up and down. M/S of uni-selector which chooses a free line. M/S of diagrams in a book showing the first transmitter and receiver. M/S of the first telephone invented by Philipp Reis in 1860, it is a box with a mouthpiece on the side. Joe Noble’s diagrams show how it works with the mouthpiece and contact points etc. M/S of the first receiver which is a bar of iron and wire, another diagram shows how this worked, it was only able to receive music not speech. Diagram of musical notes bouncing off the transmitter and through the receiver. M/S of 1876 telephone which could transmit speech. M/S of drawing of Alexander Graham Bell with transmitter and receiver system. A diagram shows how it used magnetic force to work with membrane vibration. Professor Hughes i