Blue railway signals?

Can anybody else remember blue traffic lights on railways? Can't find any evidence on google. I'm sure whereas cars have red/amber/green, railways always had a 4th blue light. What does it mean and why has it disappeared from Google?

On 13/12/2018 16:42, Fred Johnson wrote:
Can anybody else remember blue traffic lights on railways?* Can't find
any evidence on google.* I'm sure whereas cars have red/amber/green,
railways always had a 4th blue light.* What does it mean and why has it
disappeared from Google?

Never heard of it.

4 (& 5)-aspect signals have always had red, green and two ambers as far
as I know.

I know that the semaphore signals had lenses that were red and blue, but
they definitely showed as red and green when lit from behind by
yellowish oil lamps at night.

SteveW

On 13/12/2018 16:57, Steve Walker wrote:
On 13/12/2018 16:42, Fred Johnson wrote:
Can anybody else remember blue traffic lights on railways?* Can't find
any evidence on google.* I'm sure whereas cars have red/amber/green,
railways always had a 4th blue light.* What does it mean and why has
it disappeared from Google?

Never heard of it.

4 (& 5)-aspect signals have always had red, green and two ambers as far
as I know.

I know that the semaphore signals had lenses that were red and blue, but
they definitely showed as red and green when lit from behind by
yellowish oil lamps at night.

The glass in green traffic signals used to look blue to me - when they
had the dual-filament tungsten lamps.

--
Max Demian

On Thu, 13 Dec 2018 18:02:36 -0000, Max Demian wrote:

On 13/12/2018 16:57, Steve Walker wrote:
On 13/12/2018 16:42, Fred Johnson wrote:
Can anybody else remember blue traffic lights on railways? Can't find
any evidence on google. I'm sure whereas cars have red/amber/green,
railways always had a 4th blue light. What does it mean and why has
it disappeared from Google?

Never heard of it.

4 (& 5)-aspect signals have always had red, green and two ambers as far
as I know.

I know that the semaphore signals had lenses that were red and blue, but
they definitely showed as red and green when lit from behind by
yellowish oil lamps at night.

The glass in green traffic signals used to look blue to me - when they
had the dual-filament tungsten lamps.

I've never seen that. What year are you referring to?

On 13/12/2018 19:55, Fred Johnson wrote:
On Thu, 13 Dec 2018 18:02:36 -0000, Max Demian
wrote:

On 13/12/2018 16:57, Steve Walker wrote:
On 13/12/2018 16:42, Fred Johnson wrote:
Can anybody else remember blue traffic lights on railways?* Can't find
any evidence on google.* I'm sure whereas cars have red/amber/green,
railways always had a 4th blue light.* What does it mean and why has
it disappeared from Google?

Never heard of it.

4 (& 5)-aspect signals have always had red, green and two ambers as far
as I know.

I know that the semaphore signals had lenses that were red and blue, but
they definitely showed as red and green when lit from behind by
yellowish oil lamps at night.

The glass in green traffic signals used to look blue to me - when they
had the dual-filament tungsten lamps.

I've never seen that.* What year are you referring to?

Well, when they used tungsten lamps, not many years ago. It may be just
how the daylight caught the (unlit) lens.

--
Max Demian

On Thu, 13 Dec 2018 22:25:30 +0000, Max Demian, an especially stupid,
notorious, troll-feeding, senile idiot, blathered



Well, when they used tungsten lamps, not many years ago. It may be just
how the daylight caught the (unlit) lens.

YOU certainly got caught in the totally ****ed up Scottish troll's net
again, senile fool! tsk

On Thu, 13 Dec 2018 22:25:30 -0000, Max Demian wrote:

On 13/12/2018 19:55, Fred Johnson wrote:
On Thu, 13 Dec 2018 18:02:36 -0000, Max Demian
wrote:

On 13/12/2018 16:57, Steve Walker wrote:
On 13/12/2018 16:42, Fred Johnson wrote:
Can anybody else remember blue traffic lights on railways? Can't find
any evidence on google. I'm sure whereas cars have red/amber/green,
railways always had a 4th blue light. What does it mean and why has
it disappeared from Google?

Never heard of it.

4 (& 5)-aspect signals have always had red, green and two ambers as far
as I know.

I know that the semaphore signals had lenses that were red and blue, but
they definitely showed as red and green when lit from behind by
yellowish oil lamps at night.

The glass in green traffic signals used to look blue to me - when they
had the dual-filament tungsten lamps.

I've never seen that. What year are you referring to?

Well, when they used tungsten lamps, not many years ago. It may be just
how the daylight caught the (unlit) lens.

Could be, never seen it myself, but then colour is subjective.

On Thu, 13 Dec 2018 16:57:52 +0000, Steve ******, the notorious,
troll-feeding, senile idiot, blathered again:


disappeared from Google?

Never heard of it.

Ever heard of a troll named Hucker, senile idiot? The very troll whose cock
you INSTINCTIVELY suck whenever he appears under a new nym? LOL

On Thu, 13 Dec 2018 16:57:52 -0000, Steve Walker wrote:

On 13/12/2018 16:42, Fred Johnson wrote:
Can anybody else remember blue traffic lights on railways? Can't find
any evidence on google. I'm sure whereas cars have red/amber/green,
railways always had a 4th blue light. What does it mean and why has it
disappeared from Google?

Never heard of it.

4 (& 5)-aspect signals have always had red, green and two ambers as far
as I know.

I know that the semaphore signals had lenses that were red and blue, but
they definitely showed as red and green when lit from behind by
yellowish oil lamps at night.

It's possible I'm remembering a switched off light. It was 30 years ago. But they were electric lamps - maybe they still used the same lenses? Maybe they had longer lasting yellowish filament bulbs? Road traffic lights at the time were green lenses, with I think a white bulb.

On 13/12/2018 16:57, Steve Walker wrote:
On 13/12/2018 16:42, Fred Johnson wrote:
Can anybody else remember blue traffic lights on railways?Â* Can't find
any evidence on google.Â* I'm sure whereas cars have red/amber/green,
railways always had a 4th blue light.Â* What does it mean and why has
it disappeared from Google?

Never heard of it.

4 (& 5)-aspect signals have always had red, green and two ambers as far
as I know.

I know that the semaphore signals had lenses that were red and blue, but
they definitely showed as red and green when lit from behind by
yellowish oil lamps at night.

SteveW

No, Blue was never part of railway standard signals. I am very hazy but
ISTR two amber - sequnec being green-two amer - one amber - red as the
obstruction was approached..

ISTR blue was something one saw on te railways but it wasn't part of the
standard signals


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