----- Original Message -----
From: Bob Poortinga <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Saturday, November 20, 1999 10:37
Subject: Re: [IllianaRR] defect detectors
>
> Paul Lutz asks:
>
> > Question: WRRS offered a somewhat primitive dragging equipment detector
> > and it is not clear to me how this would be wired so as to alert the
train
> > crew of defects. What technology was available in 1938 to support this
type
> > of installation? a dedicated lineside detector signal of some sort?
> > integrated into CTC or ABS systems? Any ideas?
The Boston & Maine had slide detector fences in the Berkshire Mountains
connected to the block signal system. If anything was detected by the wired
fencing material, the signals dropped to their most restrictive indication.
I believe DRGW had the same type of system as well. Trains were then
required to operate at restricted speed prepared to stop short of any debris
or fallen materials on the tracks within these areas.
Tuch
------------------------------------------------------
This is the Illiana Railroad Discussion List.
For more info visit http://www.railcenter.com/illiana
------------------------------------------------------
