Telegraph block instrument (permissive)
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License this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
License this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
License this image for commercial use at Science and Society Picture Library
License
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument (permissive)
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument (permissive)
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument (permissive)
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; LNWR Fletcher's ('Tele. Dept Stockport No. 856'). Combined 2-needle permissive pegging/non-pegging 3-position/3-indication. Circular bakelite commutator/permissive tell-tale window is set in a large brass disc. At RHS is a 'permissive' plunger and blockbell-tapper (in its original position) is at top RHS (door) with underslung bell-dome. Note the early cast-iron legs.
Details
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