Re: Signalling at Essendon was Kensington grain siding - Part II

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

Christopher_Martin GORDON wrote:

> : > 6 was something to do with Down moves, an auto? I don't know it
> : > is no longer in use
>
> : Lever 6 controlled the auto signal E 291 and was required because the
> : points from the car siding were situated in the normal speed overlap of
> : the home signal No 8 provided crossover 7 was left normal. Crossover 5
> : was apparently outside the overlap area and therefore even though it
> : survives today the lever control of E 291 is not required.
>
> 5? Sorry I am lost here. (now I think of it I think you mean 15).

Sorry Chris you are right, my photo copy is a little faint and it was a bit
late.

>
> 8 is the home signal, after that is a facing crossover 7 to the up
> line, and then 11 from the car sidings (removed) and 15 which is
> the reverse crossover from the up to down line.
> So you needed to control the previous auto becuase of the trailing points
> but not facing points? ie crossover 7.

Yes, only trailing points affect the overlap.

>
> So now when 8 is normal E291 will be at stop but has no control? Why?

But is it at stop now when 8 is at stop and there are no trains in the
station. E291 should be clear if there are no trains in the overlap and as it
has an A and B arm. Does the B arm clear to yellow giving R/Y aspect when a
train has cleared the medium speed overlap of E291 which would only be about
to where the siding points were.

>
>
> : > 14,20,28 spare?
>
> I think in theory 14 is spare so you could have both car sidings with
> their own signals. 20 and 28 would fit in as signals at either end of
> the road between 1 and 2 (but since the middle road was removed they
> were never needed)
>
> : > 23? something to do with the crosslocked frame???
>
> : 23 was the crosslock lever which when reversed, electrically released
> : lever 1 in the ground frame.
>
> What did the ground frame control?
> as far as I can tell 1a was the release 2a was the points from no.1 road
> 3a was the catch from siding d and 4a was the points/catch from siding
> E

Auxiliary Frame Levers.
1 - Electrical Crosslock Lever
2 - Lock bar for 3 points.
3 - Points leading from No 1 road towards Sdgs C or D (and there was a catch
point in the neck of the lead to C or D.
4 - Points and catch from lead to C and D to Siding E.

>
>
> What else did 23 lock when reversed ie main line points/signals.

When 23 lever was reverse it would have prevented any movement towards No 1
road. Whether it prevented the points from being reversed or merely signals
leading to No 1 from being cleared I'm not sure. You would need some circuits
to tel you - or a signalman of the period.

David