selector switch, 1903

Made:
1903 in United Kingdom

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

Creative Commons LicenseThis image is released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence

Buy this image as a print 

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

Creative Commons LicenseThis image is released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence

Buy this image as a print 

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

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Selector switch, Clark Automatic Telephone Company, Providence, Rhode Island, USA, 1903. From automatic
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Selector switch, Clark Automatic Telephone Company, Providence, Rhode Island, USA, 1903. From automatic
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Selector switch, Clark Automatic Telephone Company, Providence, Rhode Island, USA, 1903. From automatic
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Selector switch, Clark Automatic Telephone Company, Providence, Rhode Island, USA, 1903. From automatic
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Selector switch, Clark Automatic Telephone Company, Providence, Rhode Island, USA, 1903. From automatic
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Selector switch, Clark Automatic Telephone Company, Providence, Rhode Island, USA, 1903. From automatic
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Selector switch, made by the Clark Automatic Telephone Company, United States, 1903. From automatic interdepartmental telephone switchboard installed at Guy's Hospital, February, 1903.

This is a selector switch comprising part of the internal telephone system used at Guy's Hospital between 1903 and 1932. It was a simple switch, which although not suitable for public exchanges, was useful for exchanges within a single building. Rotating the dial on a telephone to the number needed wound a spring inside the telephone, which drove a toothed wheel. Electrical impulses were sent to an electromagnet in the selector switch for each tooth that was passed, which then connected the telephone to the number called.

On display

Science Museum: Information Age Gallery: Exchange

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Details

Category:
Telecommunications
Object Number:
1933-33
Materials:
copper (alloy), steel (metal), textile, wood (unidentified)
type:
electric switch
taxonomy:
  • component - object
credit:
Donated by The Governors of Guy's Hospital
status:
Permanent collection

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