Mercury switch

Made:
c.1950 in United Kingdom
maker:
Power Equipment Company Limited
Mercury switch photographed from above on a white background.

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Mercury switch photographed from above on a white background.
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Mercury tube type 8-40A for a mercury tilt switch.

Details

Category:
Telecommunications
Object Number:
Y2003.22.120.3
Materials:
glass, mercury, metal, paper and plastic
type:
switching unit
credit:
Gift of British Telecommunications plc