Some advice, please, if possible from those more knowledgeable than I about signalling.
The progress towards installing the ‘missing’ section of baseboard (as described in my post #271), and my last post above, has obliged me to give more detailed thought to signalling for the southern end of Cairnie Junction station.
I will never be able to fully signal my planned layout. I can live with incomplete signalling, but I can’t live with nonsense signalling. So I will aim for a reasonable representation, as complete as is possible using vintage equipment.
I can I am sure repair enough colour-light signals to cover the running lines at Cairnie Junction. I have the junction signals necessary and single-post Bassett-Lowke colour-light signals are easily found. Even if I don’t currently have all the single-post signals I need, obtaining the others required shouldn’t take too long or be expensive. But I have no colour-light signals for calling-on and shunting movements to sidings. I pretty sure such things were not made. And, actually, I don’t know what real-life practice was in this regard in the 1930s.
I have seen pictures where colour-light signals for running lines were accompanied by mechanical discs for shunting movements. Was this usual in the early days of colour lights? If prototypically correct, a combination of colour lights for running lines and mechanical shunting signals would be a good option for me.
Now, several types of shunting signal were available from model manufacturers in the 1930s. Further ignorance on my part, but which types of mechanical shunting signal could be used — realistically — in combination with colour-lights?
Bassett-Lowke Lowko Track points were fitted with point indicator lamps:
As seen above, the rotating lamp is operated by the point lever moving the switch blades. But Bassett-Lowke offered similar rotating lamps on stands to be operated independently of setting the points (ie. signals rather than point indicators). I have two of these. I could also pretend the point indicator lamps were ground signals.
Then there are these:
The type on the left corresponds to the picture in the Mills Bros (Milbro) catalogues in the 1930s. There is no trade mark or other identification on the model itself. It’s made up of soft metal, presumably lead alloy, castings — not usual for items manufactured by Mills Bros. Perhaps ‘sold by’ Mills, rather than ‘made by’? I have just two of these but they seem quite common items.
The disc signal on the right in the above picture is the only one I have ever seen of this type. I have not seen any catalogue entry corresponding to this model either. The main casting for the base+post+lamp is obviously similar to the main casting in the semaphore ground signal listed by Mills Bros. The disc itself is wood. That points very firmly to Mills Bros as the manufacturer. The rear indicator shade on this signal is missing, but I think that was probably wood too.
Bassett-Lowke also offered semaphore ground signals:
The catalogue illustration (summer, 1933 catalogue) is clearly different from the model shown in my photograph above.
For completeness, here is the catalogue entry for the ground disc corresponding to the point indicator lamp shown previously:
By this date (1933), manufactured in white metal. When first introduced, pre-WW1, made throughout in gunmetal and much more expensive.
Bassett-Lowke was not offering colour-light signals in 1933.
I would much appreciate any advice regarding the various questions above.
Thanks in advance for any assistance.