Re: [Melb] Broadmeadows re-signalling

[David Langley <del@ancc.com.au>]

Eddie Oliver wrote:

> Tony Gatt wrote:
> > I have no idea why both Starting Signals are provided with an illuminated "A".
> > When Somerton is switched out, the Starting signals do not go back to stop, so
> > therefore the "A" lights never work.
>
> They would not go back to stop in the ordinary course of events, but are
> there not circuit-failure possibilities which might make them go back to
> stop? Is the lever position the only thing in their control circuits?
> Are they controlled by the position of the block instruments?

Yes Eddie, that is why the A lights are there. Saves having to get written orders
for failed signals.

> > All signals are track circuited, except No 19 (Down Home, Upfield Line), there
> > is an illuminated track diagram, and the points are rodded, but "air assisted"
> > because they are very heavy.
>
> Please expand on the details of this air assistance. Where else is it
> provided?

A few locations had/have it - Traralgon (had), Spencer St No 1 (has), St. Albans
(has). Somerton now is a had because the points have been provided with point
machines thus eliminating the mechanical operation with air assistance. I do not
know whether they are dual control or not. Vic normally does not provide dual
control on crossovers that straddle the sg for safety reasons but the plain bg
crossover might have them.

David.