3 results found for 'Richard Challis'

  • A Fully Interlocked Lever Frame for Leeds City Junction Part 3

    Richard Challis

    Issue 288 (2022)

    p.24

    Following on from Howard Bolton's discussion of the mechanical lever frame and its electrical locks (MRJs 282 and 285), in this final instalment, Richard Challis brings this all together by outlining the general approach to wiring up the layout and how this was all tied in with the signalling scheme and in particular the interlocking requirements as previously described.

    Tags: electrics / electronics

  • Block Instruments for Stockport Tiviot Dale and Millhouses & Eccleshall

    Richard Challis

    Issue 215 (2012)

    p.147

    MRJ series - Miniature Block Instruments

    Richard Challis explains how he devised the electrical system behind the miniature block instruments now in use on two layouts

    Tags: electrics / electronics, operation, signals / signalling

  • Filming Stockport Tiviot Dale - a beginner's take

    Richard Challis

    Issue 290 (2022)

    p.90

    Tags: photography