selector switch, 1903

Made:
1903 in United Kingdom
Selector switch, Clark Automatic Telephone Company, Providence, Rhode Island, USA, 1903. From automatic Selector switch, Clark Automatic Telephone Company, Providence, Rhode Island, USA, 1903. From automatic Selector switch, Clark Automatic Telephone Company, Providence, Rhode Island, USA, 1903. From automatic Selector switch, Clark Automatic Telephone Company, Providence, Rhode Island, USA, 1903. From automatic Selector switch, Clark Automatic Telephone Company, Providence, Rhode Island, USA, 1903. From automatic Selector switch, Clark Automatic Telephone Company, Providence, Rhode Island, USA, 1903. From automatic

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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.

Details

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