John, thank you very much for the input. I am glad to know that you are involved in the restoration preservation work for these wonderful semaphores and every other instrument that was required for semaphore operation, including the repeaters. Kudos to your and your friends effort in this restoration project. The pictures are really beautiful. I found the information about signal repeaters being modified galvanometers from a blog post, whose author seems to be a train enthusiast from Britain.John Webb wrote:Welcome to the Forum! Do take a look at http://forum.signalbox.org/viewtopic.php?f=8&t=6913 which describes work undertaken last year at St Albans South signal box (a preserved box in the care of a Preservation Trust) - the work includes the installation of a signal repeater and the switch on the signal arm to work it.
None of our signal repeaters are rectangular - they are all round, about 3"(75mm) in diameter and 2.5" (67mm) deep. Some have a square base about 3.5" (85mm) wide. As you will see from the photos in the above topic, there are two types of signal repeater, the majority have a replica 'arm', one looks more like a 'galvanometer'.
Hope this is of help.
Hello JRB, thank your very much for your input. You are right about Indian repeaters being the same design as old British ones, as it can be seen in the photograph on the link posted above in my reply to John. It is quite frustrating to see IR not being as much aware or caring about its heritage as it should be. After the ruthless termination of the steam locomotives from IR geography some 21 years ago, when the last time tabled steam run passenger was stopped, now the IR is on a spree to replace the semaphore signaling with multi-aspect color light signals, which are as exciting to watch as traffic signals on road intersections! While not being totally critical of IR, who have actually done "some" good job about restoring museum exhibits and plinthed locomotives to working condition and have a dedicated steam locomotive shed but I feel this isn't enough as IR should invite more volunteer participation from public. Hopefully, one day things will change for better.JRB wrote:In recent years, most signal repeaters were round like John Webb's at St. Albans. Many earlier ones were in rectangular wooden cases and some have survived to recent times. British signal engineering firms, notably Westinghouse and its constituents, had factories in India, so Indian instruments largely followed British designs.
Users browsing this forum: No registered users and 5 guests