Director switching device, 1927

Made:
1927 in Edge Hill
maker:
Automatic Telephone Manufacturing Company
Director switching device, 1927 (electric switch) Director switching device, 1927 (electric switch) Director switching device, 1927 (electric switch) Director switching device

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

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License this image for commercial use at Science and Society Picture Library

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

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License this image for commercial use at Science and Society Picture Library

License

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Director switching device
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Director switching device, made by the Automatic Telephone Manufacturing Company, Edge Hill, Liverpool, England, 1927. From the first London director exchange at Holborn. With case.

The Director telephone system was used in some large cities in Britain between the 1920s and the 1970s. In large conurbations there were many telephone exchanges and special means were needed to connect any two callers together. Within such areas, a switching device called a director routed telephone calls between exchanges that were not directly connected with each other. A three-letter code identified each exchange. The first director exchange in Europe was opened at Holborn Exchange, London, in 1927.

Details

Category:
Telecommunications
Object Number:
1971-352
Materials:
metal (unknown), paint and textile
Measurements:
overall: 585 mm x 435 mm x 215 mm, 27.5 kg
type:
electric switch
credit:
Donated by the Post Office Telecommunications Museum

Parts

Director switching device, 1927

Director switching device, 1927

Director switching device, made by the Automatic Telephone Manufacturing Company, Edge Hill, Liverpool, 1927. From the first London director exchange at Holborn.


The Director telephone system was used in some large cities in Britain from the 1920s to the 1960s. In large areas, calls crossed across the city, so different exchanges needed to be connected. Within the Director area, a switching device routed telephone calls between exchanges that were not in direct communication using a three letter code. The first Director exchange in Europe was opened at 270 High Holborn, London, in 1927.

Measurements:
overall: 585 mm x 435 mm x 215 mm, 27.5 kg
Materials:
metal (unknown) , paint and textile
Object Number:
1971-352/1
type:
electric switch
case for director switching device, 1927

case for director switching device, 1927

Metal cover for relays and two-motion selector from Director switching device, made by the Automatic Telephone Manufacturing Company, Edge Hill, Liverpool, 1927. From the first London director exchange at Holborn.

Measurements:
overall: 585 mm x 435 mm x 215 mm, 27.5 kg
Materials:
metal (unknown) , paint and textile
Object Number:
1971-352/2
type:
case