Re: Three Position Signalling

["Notagunzel" <notagunzel@bigfoot.com>]

Christopher_Martin GORDON <cmgord@ecr.mu.oz.au> wrote in message
news:7t1l1j$406$2@mulga.cs.mu.OZ.AU...
>
> : > Are there any mechanical three position dwarfs left? (Ie wire pull ones)
> : > or was the ones at Ringwood the last.

> : Wasn't the wire operated dwarf at Ringwood 2 position? (Centre road for up
> : movements).
> : There was one on the back road as well... (signal 30 I believe)

> There were three at Ringwood, 28 up move out of no.2A (centre road), 30
> up move from no.1 (back road) to either siding 'e' or the up line, and
> 21 set back from up line to either No.3, No.2A, No.2 or No.1.

> All three were operated by wire from the signal box.  They had red and
> yellow lenses and worked in the upper quandrant.  So that would make them
> a three position signal (since a two position dwarf works in the lower
> quandrant and has red and green lenses, see post 7 at Showgrounds Refuge
> Siding)

Also, a three position dwarf can display up to three positions, but only a power
operated 3P dwarf can display Clear Low Speed.  Mechanical 3P dwarfs can only
display Stop & Caution Low Speed.

--
Mr Notagunzel.
Rail Transportation Connoisseur.
notagunzel@bigfoot.com
(Waiting for any move at http://www.bigfoot.com/~notagunzel)