Isambard Kingdom Brunel Posted September 4, 2021 Share Posted September 4, 2021 I have built a lever frame and I am not sure the position of the levers in relation to: A. GWR Signal set at danger, (signal pulled off?) B. Turnouts, do you pull the lever to set the way, otherwise its a straight road? Thanks Link to post Share on other sites More sharing options...
Grovenor Posted September 4, 2021 Share Posted September 4, 2021 Levers are specified to be normal when back in the frame and reverse when pulled to the front. (there are rare exceptions). Signals are usually set at danger with the lever normal and will give a proceed indication when the lever is reverse. Pulling the lever from normal to revers is often described as pulling off. So a signal pulled off is at clear, not at danger. Points are defined as normal or reverse corresponding to the position of the lever, usually the most important route will be normal and the less important reverse but there are exceptions eg trap points are usually normal in the trap position. It is the job of the signal engineer to define the normal positions when preparing the signal plan and these will be shown on the signal box diagram. 2 Link to post Share on other sites More sharing options...
Michael Hodgson Posted September 4, 2021 Share Posted September 4, 2021 With extremely few exceptions, signal levers are back in the frame for the Danger position (caution for Distants), pull to clear. Point levers are back in the frame for "Normal" position, the way they lie when there are no trains about, or pull to "Reverse" Normal is often the straight position, but by no means always, and of course curved and wye points don't have a straight route anyway. The Normal position of points is a decision taken by the planners, and for safety reasons they choose it such that conflicting routes are avoided. 1 Link to post Share on other sites More sharing options...
Michael Hodgson Posted September 4, 2021 Share Posted September 4, 2021 Grovenor beat me to it! Link to post Share on other sites More sharing options...
Isambard Kingdom Brunel Posted September 4, 2021 Author Share Posted September 4, 2021 Thanks very much for your quick answers, that's a great help Link to post Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now