Telegraph Block Instrument; Tyers Patent; 2-position type
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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
Block-instrument: Tyer's 2-needle (Up / Down Train; On Line /
Science Museum Group
© The Board of Trustees of the Science Museum
Block-instrument: Tyer's 2-needle (Up / Down Train; On Line /
Science Museum Group
© The Board of Trustees of the Science Museum
Block-instrument: Tyer's 2-needle (Up / Down Train; On Line /
Science Museum Group
© The Board of Trustees of the Science Museum
Block-instrument: Tyer's 2-needle (Up / Down Train; On Line / Arrived) 2-position Single Line (accepting / sending) with white / red-vane release-plunger to rotary commutator with central bell-plunger.
