Tyer's One-Wire Three Indication Block Instrument

Block-instrument: Tyer's 2-needle (Down / Up Lines) Block-instrument: Tyer's 2-needle (Down / Up Lines) Block-instrument: Tyer's 2-needle (Down / Up Lines)

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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

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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

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Block-instrument: Tyer's 2-needle (Down / Up Lines)
Science Museum Group
© The Board of Trustees of the Science Museum

Block-instrument: Tyer's 2-needle (Down / Up Lines)
Science Museum Group
© The Board of Trustees of the Science Museum

Block-instrument: Tyer's 2-needle (Down / Up Lines)
Science Museum Group
© The Board of Trustees of the Science Museum

Block-instrument: Tyer's 2-needle (Down / Up Lines), 3-position absolute (pegging / non-pegging) with rotary-sequence commutator (pattern 2004) and plunger release, door-lock key present, no dome / striker.

Details

Category:
Signalling & Telecommunications
Object Number:
1964-330/38
type:
block instrument
credit:
Tyer and Company Limited