Telegraph block instrument
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LicenseThis image is released under a CC BY-NC-SA 4.0
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Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
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Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
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Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
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Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
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Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
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Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; Midland Railway
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; Midland Railway
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; Midland Railway
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; Midland Railway
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; Midland Railway
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; Midland Railway
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; Midland Railway
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; Midland Railway
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; Midland Railway. (Sykes?) 1-needle absolute 3-position instrument, with a bakelite handle as a rotary commutator and 3 push-buttons: LC Cancel, TOL Cancel (behind paper/glass), BBI Release, and LC Release controlled by Distant (behind paper/glass).
