Re: Three Position Signalling

[David Guymer <davidmg@optusnet.com.au>]

I was not aware of the dates for theese signals outside of the metropolitan
area. It was not my intention to indicate that the signal at Epsom Road was the
first of it's type, but that it predated the Rule Book. Thanks for setting me
straight on the order of these signals.
David G.

Exnarc wrote:

> David Guymer <davidmg@optusnet.com.au> wrote in message
> 37F9AD7B.CD073581@optusnet.com.au">news:37F9AD7B.CD073581@optusnet.com.au...
> >
> >
> > Exnarc wrote:
> >
> > > snip
> > >
> > > There are (at least) 3 locations where 2 Position Dwarfs show a Yellow
> > > Light.
> > >
> > > 1: Portland.
> > >
> > > 2: Showgrounds. From Platform to Up Refuge Siding.
> > >
> > > 3 Newport. Dual Gauge to Anzac Siding.
> > >
> > > They are mounted on the same post as a Home Signal and only light up
> when
> > > the signal is pulled off. Unlike a Calling On signal they do not read to
> the
> > > same road as the Home signal, but other than that they look the same,
> > > except, they have the word "Siding" painted on or attached to the
> target..
> > >
> > > The purpose of these signals resulted from the need to find a
> replacement
> > > for the mechanical Disc signal, so the Siding Dwarf was developed.
> > >
> >
> > Not quite the Dwarf at Epsom Rd (Showgrounds) existed well before it was
> written
> > into the rule book. I don't know why the powers that were decided to
> finally
> > include this anomaly in the rule book but it was certainly after the fact.
> > David G.
> >
> Not quite David, the Portland Dwarf was the first, Alan Hales introduced it
> when he was Supt Safeworking. It came out as a Special instruction first,
> then the Show Grounds was added.
>
> The first instance was at Murtoa during the CTC construction when the Up
> home at Murtoa was replaced by a colour light signal, as an intrim the "A"
> light was used for the mainline departure and the "C" light was used to
> access Marmalake Siding from the mainlaine , this came out as a Special
> Instruction also.
>
> The first use of the light dwarf (on same post as a home) with the lettering
> "SIDING" was the Portland one. (After Murtoa), then the Show Grounds, with
> the lettering "SIDING". What ever existed at the Show Grounds before I can't
> remember (may have been a mechanical Disc)? but it certainly was not the
> current "SIDING" signal.
>
> Bob.