polarized 'guillotine' relay, 1862-1866

Made:
1862-1866 in England
maker:
William Stratford Andrews
Andrew's guillotine relay, 1864 Andrew's guillotine relay, 1864 Andrew's guillotine relay, 1864 Polarized 'guillotine' relay, brought out by W Andrews, England, 1862-4.
      
      A relay is an electrically operated switch, Polarized 'guillotine' relay, brought out by W Andrews, England, 1862-4.
      
      A relay is an electrically operated switch, Polarized 'guillotine' relay, brought out by W Andrews, England, 1862-4.
      
      A relay is an electrically operated switch, Polarized 'guillotine' relay, brought out by W Andrews, England, 1862-4.
      
      A relay is an electrically operated switch, Polarized 'guillotine' relay, brought out by W Andrews, England, 1862-4.
      
      A relay is an electrically operated switch, Polarized 'guillotine' relay, brought out by W Andrews, England, 1862-4.
      
      A relay is an electrically operated switch,

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Andrew's guillotine relay, 1864
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Andrew's guillotine relay, 1864
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Andrew's guillotine relay, 1864
telecommunications; communications; electrical; electrical relay; relay; guillotine relay; guillotine; William Stratford Andrew; Stratford Andrew; Andrew; Andrew's guillotine relay; wood; metal; 1864; 1860's; 19th Century
telecommunications; communications; electrical; electrical relay; relay; guillotine relay; guillotine; William Stratford Andrew; Stratford Andrew; Andrew; Andrew's guillotine relay; wood; metal; 1864; 1860's; 19th Century

Polarized 'guillotine' relay, brought out by W Andrews, England, 1862-4. A relay is an electrically operated switch,
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Polarized 'guillotine' relay, brought out by W Andrews, England, 1862-4. A relay is an electrically operated switch,
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Polarized 'guillotine' relay, brought out by W Andrews, England, 1862-4. A relay is an electrically operated switch,
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Polarized 'guillotine' relay, brought out by W Andrews, England, 1862-4. A relay is an electrically operated switch,
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Polarized 'guillotine' relay, brought out by W Andrews, England, 1862-4. A relay is an electrically operated switch,
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Polarized 'guillotine' relay, brought out by W Andrews, England, 1862-4. A relay is an electrically operated switch,
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Polarized 'guillotine' relay, designed by W Andrews, England, 1862-1866.

A relay is an electrically operated switch, and allowed weak telegraph signals to be boosted by a local power source. Polarised electrical relays work by using an armature in between the poles of a permanent magnet in order to increase sensitivity. This one has an armature in the form of a semicircular magnet, placed horizontally and vibrating between two electromagnets. The current passes through both sets of coils, which are wound so that one attracts, and the other repels the armature.

Details

Category:
Telecommunications
Object Number:
1876-1490
Materials:
brass (copper, zinc alloy), glass and wood (unidentified)
Measurements:
overall: 225 mm x 280 mm x 185 mm, 3.55kg
type:
electric switch
taxonomy:
  • component - object
credit:
From William Stratford Andrews