Telegraph block instrument, early Walker's type

Telegraph block instrument with combined bell and tapper Telegraph block instrument with combined bell and tapper Telegraph block instrument with combined bell and tapper Telegraph block instrument with combined bell and tapper Telegraph block instrument with combined bell and tapper Telegraph block instrument with combined bell and tapper

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

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

License

Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

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

License

Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

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

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Telegraph block instrument with combined bell and tapper
Science Museum Group
© The Board of Trustees of the Science Museum

Telegraph block instrument with combined bell and tapper
Science Museum Group
© The Board of Trustees of the Science Museum

Telegraph block instrument with combined bell and tapper
Science Museum Group
© The Board of Trustees of the Science Museum

Telegraph block instrument with combined bell and tapper
Science Museum Group
© The Board of Trustees of the Science Museum

Telegraph block instrument with combined bell and tapper
Science Museum Group
© The Board of Trustees of the Science Museum

Telegraph block instrument with combined bell and tapper
Science Museum Group
© The Board of Trustees of the Science Museum

Telegraph block instrument with combined bell and tapper. Early Walker's type. Absolute double-semaphore (lower-quadrant) block-indicators (top: red/white strip; bottom: white/black strip), mounted (at different levels) on vertical wooden finialled post. This instrument requires a separate commutator-box with bell-key/plunger, and bell-assembly. Later Walker's instruments were rectangular, with the block-indicators at the same level, and a bell-assembly mounted on the top.

Details

Category:
Signalling & Telecommunications
Object Number:
1996-7028
type:
telegraph instrument
credit:
British Rail