tgindy:
What does anyone here know about railroad "telltales?"
I know they were a required safety device, to warn anyone on top of a moving car to get down and avoid the low overhead clearance they preceeded.
It seems telltales were used as a trackside/overhead warning system. How did various railroads use telltales, and when if ever, did telltales fall out of practice?
The telltale, in its most basic form, was a 'beard' of weighted ropes (or very thin chains) suspended over the track 100 feet (minimum) in advance of a low overhead obstruction (tunnel portal, bridge, even low-hanging power or telephone wires.) The ropes could be suspended from a transverse cable or a higher clearance structure, and hung down to a level 6 inches below the minimum clearance. Since their use was mandated by federal law, telltale location and use was pretty much the same on all railroads.
After roof walks were outlawed, the use of telltales was no longer necessary. I have heard of a few, in use where a worker might be on top of a covered hopper being moved at a grain loading facility. The near-universal application on all classes of trackage is no longer required, and most, if not all, have been removed.
Telltales would seem to be a neat little modeling touch for the correct prototypical situations.
Also, how do you model your telltales?
One of my sources of mild heartburn is the general lack of telltales on model railroads that run steam locomotives and freight cars with roof walks. Even the majority of rivet counters seem to be lacking this basic feature of pre-1970 railroad infrastructure.
That said, I don't model telltales. My prototype had neither roof walks nor high-mounted brake gear, so they were never used.
Chuck (Modeling Central Japan in September, 1964)