The Museum of Science and Industry in Manchester

Charles Moseley & Son were one of the first Manchester companies to make and install telephone equipment.

Charles Moseley & Son were one of the first Manchester companies to make and install telephone equipment.

It was designed by Alexander Marr who joined the company as head of the construction department. He used a diaphragm of thin pine wood, with a carbon disc or button fixed to the centre, to form the front electrode.

It was designed by Charles Moseley who used a diaphragm of ebonite. This type of transmitter was used by the Post Office before the general introduction of the Deckert transmitter in the late 1880s.

Charles Moseley & Son were one of the first Manchester companies to make and install telephone equipment.

This transmitter enabled high speed transmission of signals by mechanical means at much faster rates than could be obtained by manually operated key. It was used with a perforator to prepare the tape, or 'slip', and a receiver.

Charles Moseley & Son were one of the first Manchester companies to make and install telephone equipment and designed the transmitter on this telephone.

Ferranti began making telephones with the privatisation of telephone services. This phone was available in three other colours and had what was then a novel redial function.

It was used on the Preston and Wyre Railway and later kept as a 'curio' at the Manchester School of Signalling based at Victoria Station.

You can see: a 'Bass' tool bag, a leather safety belt probably from the 1960s, telephone pole climbing iron, 40-lb overhead line wire-tensioning clamp by Bradbury of 1939 and a jointers headphone set with earpieces.