Andrew Nummelin
Member
- Location
- Powys
I recently joined the Newport MRS and on asking if there was anything I could contribute to one of their layouts (mid 1950s ex GWR branch line terminus) it was suggested that I could do three covers for facing point locks. Seemed an easy task until I looked deeper into the subject! It was considered that track circuiting would have been unlikely, so I'll have to make the lock bars as well (considering the quality of the point rodding that has been installed). A couple of the points are very close together where a simple set-up will not be possible and it could be that I'll have to have one (or two) fitted to switch and closure rails. I've failed to find photos or drawings of such an arrangement and I wondered how the necessary flexibility of the lock bar would be catered for (loose heel switches would seem to be particularly problematic). Looking for inspiration I came across a photo of Blaenavon that shows some similar complexity - at first glance there are two lock bars, one being very short, however a club member turned up the signalling arrangement for the station that shows the split lock bars were operated by a single lever (that locked both points).
Can anyone help answer the following questions?
1. Could lockbars be attached to flexible switches?
2. Would a split lock bar be used with loose heel switches?
2. How were the operating linkages arranged with such a "split" lock bar?
Thank goodness I'm not expected to make the lock bars actually work!
=============================================================
Newport MRS layout: https://www.newportmrs.co.uk/abergavenny-blackbrook - Templot was used for the planning.
Photo: clip from plate 82 in Monmouthshire Eastern Valleys by Mitchell & Smith attributed to P.J. Garland/R.S. Carpenter.
Can anyone help answer the following questions?
1. Could lockbars be attached to flexible switches?
2. Would a split lock bar be used with loose heel switches?
2. How were the operating linkages arranged with such a "split" lock bar?
Thank goodness I'm not expected to make the lock bars actually work!
=============================================================
Newport MRS layout: https://www.newportmrs.co.uk/abergavenny-blackbrook - Templot was used for the planning.
Photo: clip from plate 82 in Monmouthshire Eastern Valleys by Mitchell & Smith attributed to P.J. Garland/R.S. Carpenter.
Attachments
message ref: 4704