Blue railway signals?

On Sat, 15 Dec 2018 13:43:09 -0000, Mr Pounder Esquire wrote:

Kristy Ogilvie wrote:
On Sat, 15 Dec 2018 11:02:40 -0000, Rod Speed
wrote:


"Kristy Ogilvie" wrote in message
news On Fri, 14 Dec 2018 00:55:55 -0000, Rod Speed
wrote:



"Fred Johnson" wrote in message
news On Thu, 13 Dec 2018 23:43:41 -0000, Rod Speed
wrote:



"Fred Johnson" wrote in message
news On Thu, 13 Dec 2018 23:12:50 -0000, Rod Speed

wrote:



"Fred Johnson" wrote in message
news On Thu, 13 Dec 2018 21:03:57 -0000, Mike Humphrey
wrote:

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?

Railway signals in modern times have always had red, yellow
(not amber)

I've never been fussy enough to even notice the difference
between yellow,
amber, orange. I could tell the difference if they were side
by side,
but
I just think of a road traffic light as either yellow or
orange. I couldn't even tell you what amber colour is
compared to yellow and orange.
I don't do things like "mauve", etc. Just purple, light
purple, etc.

and green. A four-aspect signal has two yellows - the
sequence approaching a stop signal goes G, YY, Y, R. There
can be a number of
other indications as well as the main signal but these are
almost invariably white.

I assume this is to allow trains the longer stopping distance
they require
than road vehicles.

There's a number of uses for blue and purple, but not
appearing with
the
R/Y/G "traffic light" signals, at least in the UK.

I might be thinking of non "traffic light" signals, or I
might be thinking
of a light which was off and was just seeing the blue lens
which had a
yellow light behind to make green.

If you want to look
at the full range of signs and signals,
http://www.railsigns.uk/ has
a
very comprehensive guide.

That's a lot for a driver to remember! At least with road
signs the symbol is meaningful.

I wonder why the red is at the bottom on rail lights and the
top on traffic lights?

Basically because when there are two ways of doing
something, you can be sure someone will do it both ways.

Like my bloody French car which has the wiper switch going down
to increase speed.

And with light and power switches in houses etc.

Down should always be on

The yanks feel otherwise.

The yanks don't think at all.

I said feel, not think, stupid.

But you meant think, or should have done. Deciding on a switch
mechanism involve thinking, not emotions.
(except two or more way switches of course).

And then some bugger shows up who decides to do
them sideways so there is no confusion at all, and we
end up with 4 different ways of doing it instead of just 2.

Never seen a sideways lightswitch in a house.

But you do see it with power switches.

Not here.

There is completely irrelevant.

We are the centre of the world. Most countries were colonised by us,
we have the 0 GMT point, we invented the language most people use,
etc.
They're similar to light switches, although more rugged as they
switch a higher current.

Anyway with automatic ones, there are no switches.

There are in mine.

A couple of mine have manual overrides, my bedroom for example is
normally on a 15 second timer, so it goes off just after I get into
bed, but sometimes I press the switch to leave it on if I'm doing
something else in there. And don't go inserting rude things!

Nothing rude about ****ing, wanking or even
changing the sheets or untangling the blankets
or cleaning up after you have ****ed the bed again.

If you were closer I'd spank you for saying those things.

But most of them are auto only.

None of mine are.

I don't see the point in manual override in most rooms.

I can always make them come on when it's light by covering the
sensor momentarily.

Me too.

I'm surprised so few people have auto lights.

And with whether hot and cold taps have the
hot one on the right of the pair or the left.

I can never remember which way round mine are, until I go to use
one. Because when I use one in another house that's the other way
round, I always get it wrong.

Never had any other car that way round.

Yeah, the frogs are much worse for that than most.

They even speak backwards, putting the noun before the adjective.

And some buggers even write backwards.

Muslims.

And some write upside down.

Who?

Like I said, whenever there is more than one way to do it,
you can be sure some will do it one way and some the other.

Yes, there are always morons.

And ******s like you.

That would imply deliberately mis-designing your own product.

**** off Hucker.

"

On Sat, 15 Dec 2018 10:55:01 -0000, Rod Speed wrote:



"Kristy Ogilvie" wrote in message
news
On Sat, 15 Dec 2018 00:40:37 -0000, Rod Speed
wrote:



"JNugent" wrote in message
...
On 14/12/2018 11:33, Nightjar wrote:
On 14/12/2018 09:27, Rod Speed wrote:
Nightjar wrote
Fred Johnson wrote

I wonder why the red is at the bottom on rail lights and the top on
traffic lights?

On railways it is at the bottom so that there is no light shade below
it, on which snow could build up and obscure the light.

So why didn't that continue with street lights ?

Perhaps the American who invented them hadn't thought about that
problem.
Overground railway light signals were not standardised until rather
later - in 1924.

I have never seen a set of road traffic lights obscured by built-up
snow,
not even during the worst of UK blizzards. Has anyone else?

https://www.google.com/search=traffi...+snow&tbm=inch

How did you manage to misspell isch as inch as part of a URL?

The stupid spell checker keeps defaulting to change instead of ignore
and its easy to not notice that when ignoring what it whines about.

Mine just underlines things in red, I have to click each one to do anything about it.

Did your spellchecker treat it as a word?

Corse any spell checker has to.

********, easy to detect a URL by the http etc.

The worrying thing is my brain immediately spotted inch as incorrect for a
google search parameter.

You should do the decent thing and disembowel yourself.

Hey, it means I'm really observant.

You also omitted ?q after the word search. You can't insert parameters
without a ? to indicate them.

I inserted nothing.

It was done so for you when you did the search.

Interesting that it mostly appears to be driven show forming a disc
over the entire lens rather than a pile that eventually gets high
enough to obscure the top one, sitting on the visor of a lower one.

Because vertically falling snow with no wind can't get to the lower
visors, due to the upper visors getting in the way. It has to be snow on
a windy day.

There is **** all snow without any wind.

There is here, in fact it's usually not windy at all when it's snowing, unless you're up a mountain.

Also interesting those are all in the USA, although I guess they get more
snow than the UK.

Guess again.

Some places in the USA get feet of snow every year. I usually get **** all.

Or maybe our lights are more slippery?

Unlikely.

True, a British engineer would never think of that.

On Sat, 15 Dec 2018 07:07:36 -0000, The Natural Philosopher wrote:

On 15/12/2018 01:10, Kristy Ogilvie wrote:
And don't go inserting rude things!

Don't you like it, then?

Not when he's doing it.

On Sat, 15 Dec 2018 07:06:28 -0000, The Natural Philosopher wrote:

On 15/12/2018 01:00, Kristy Ogilvie wrote:
On Fri, 14 Dec 2018 22:59:29 -0000, Steve Walker
wrote:

On 14/12/2018 18:22, Fred Johnson wrote:
People with colour blindness shouldn't drive trains (or cars for that
matter).

And it's not very many, in fact I know of only one person who's
colourblind.

It matter for railways due to needing to determine the colour from a
long distance, due to the long stopping distance of a train. It is fine
for a colourblind person to drive a car, as the stopping distance is
short enough for the driver to get close enough to determint the
position of the light on traffic light.

Up to eight percent of men of North European decent are red-green colour
blind.

Since when were Northern European men decent? :-)

Since they put on clothes to keep the ice and snow out?

So we're born indecent? That doesn't make sense whether you believe in god or evolution.

On Sat, 15 Dec 2018 07:04:55 -0000, The Natural Philosopher wrote:

On 14/12/2018 22:59, Steve Walker wrote:
On 14/12/2018 18:22, Fred Johnson wrote:
People with colour blindness shouldn't drive trains (or cars for that
matter).

And it's not very many, in fact I know of only one person who's
colourblind.

It matter for railways due to needing to determine the colour from a
long distance, due to the long stopping distance of a train. It is fine
for a colourblind person to drive a car, as the stopping distance is
short enough for the driver to get close enough to determint the
position of the light on traffic light.

Up to eight percent of men of North European decent are red-green colour
blind.

I have lost 90% of color vision on the center of my left eye

That's very specific. I didn't know it could be so. Did you cause it harm in some way?

On Sat, 15 Dec 2018 05:52:25 -0000, Rod Speed wrote:



"Fred Johnson" wrote in message
news
On Fri, 14 Dec 2018 08:45:09 -0000, The Natural Philosopher
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.

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

Yes it was probably a light for something else I saw. Google refers to it
being used for tunnels etc. Mainly for markers to show where an edge is
(not sure why a train needs to know that, after all they can't be
steered....)

Its in case the train breaks and you need to walk out of the tunnel, stupid.

Why not just make them white?

On Fri, 14 Dec 2018 18:21:55 +0000, Fred Johnson wrote:

On Fri, 14 Dec 2018 11:22:05 -0000, Max Demian
wrote:

====snip====


Usually hot is on the left.

Seems to be that way on all my sinks, but I'd say in other people's
houses I see it the other way round in about 20% of cases. When I were
a lad, the bathroom sink was definitely the other way round, can't
remember the kitchen sink.

Back in the day when *cold* running water was a luxury, the tap (fawcet)
would be mounted on the RHS for ease of use by right handed people (the
majority of the population - most left handers learn soon enough to
become ambidextrous).

The hot tap being a much later luxury add on had to make do with the
only remaining space on the LHS. Thus was the convention of LHS hot/RHS
cold tap placement born. The other way round is usually the result of
lazy plumbing and pure chance.

--
Johnny B Good

On Sat, 15 Dec 2018 10:33:25 +0000, Kerr-Mudd,John wrote:

On Sat, 15 Dec 2018 01:07:11 GMT, "Kristy Ogilvie"
wrote:

On Sat, 15 Dec 2018 00:40:37 -0000, Rod Speed


is a xposting troll.
PDNFTT

I think that acronym can be improved to "PDNFTFT!" :-)

--
Johnny B Good

"Kristy Ogilvie" wrote in message
news
On Sat, 15 Dec 2018 11:02:40 -0000, Rod Speed
wrote:



"Kristy Ogilvie" wrote in message
news
On Fri, 14 Dec 2018 00:55:55 -0000, Rod Speed
wrote:



"Fred Johnson" wrote in message
news On Thu, 13 Dec 2018 23:43:41 -0000, Rod Speed

wrote:



"Fred Johnson" wrote in message
news On Thu, 13 Dec 2018 23:12:50 -0000, Rod Speed

wrote:



"Fred Johnson" wrote in message
news On Thu, 13 Dec 2018 21:03:57 -0000, Mike Humphrey
wrote:

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?

Railway signals in modern times have always had red, yellow (not
amber)

I've never been fussy enough to even notice the difference between
yellow,
amber, orange. I could tell the difference if they were side by
side,
but
I just think of a road traffic light as either yellow or orange.
I
couldn't even tell you what amber colour is compared to yellow and
orange.
I don't do things like "mauve", etc. Just purple, light purple,
etc.

and green. A four-aspect signal has two yellows - the sequence
approaching a stop signal goes G, YY, Y, R. There can be a number
of
other indications as well as the main signal but these are almost
invariably white.

I assume this is to allow trains the longer stopping distance they
require
than road vehicles.

There's a number of uses for blue and purple, but not appearing
with
the
R/Y/G "traffic light" signals, at least in the UK.

I might be thinking of non "traffic light" signals, or I might be
thinking
of a light which was off and was just seeing the blue lens which
had
a
yellow light behind to make green.

If you want to look
at the full range of signs and signals, http://www.railsigns.uk/
has
a
very comprehensive guide.

That's a lot for a driver to remember! At least with road signs
the
symbol is meaningful.

I wonder why the red is at the bottom on rail lights and the top
on
traffic lights?

Basically because when there are two ways of doing
something, you can be sure someone will do it both ways.

Like my bloody French car which has the wiper switch going down to
increase speed.

And with light and power switches in houses etc.

Down should always be on

The yanks feel otherwise.

The yanks don't think at all.

I said feel, not think, stupid.

But you meant think,

Nope.

or should have done.

Nope.

Deciding on a switch mechanism involve thinking, not emotions.

Wrong, as always.

(except two or more way switches of course).

And then some bugger shows up who decides to do
them sideways so there is no confusion at all, and we
end up with 4 different ways of doing it instead of just 2.

Never seen a sideways lightswitch in a house.

But you do see it with power switches.

Not here.

There is completely irrelevant.

We are the centre of the world.

The cesspit of the world, actually.

Most countries were colonised by us,

Only in your pathetic little drug crazed drunken psychotic fantasyland.

we have the 0 GMT point,

Whoopy ****ing do.

we invented the language most people use, etc.

Nope, it evolved.

They're similar to light switches, although more rugged as they switch a
higher current.

Anyway with automatic ones, there are no switches.

There are in mine.

A couple of mine have manual overrides, my bedroom for example is
normally
on a 15 second timer, so it goes off just after I get into bed, but
sometimes I press the switch to leave it on if I'm doing something else
in
there. And don't go inserting rude things!

Nothing rude about ****ing, wanking or even
changing the sheets or untangling the blankets
or cleaning up after you have ****ed the bed again.

If you were closer I'd spank you for saying those things.

Only in your pathetic little drug crazed
drunken psychotic S&M fantasyland.

But most of them are auto only.

None of mine are.

I don't see the point in manual override in most rooms.

I didn't say manual.

I can always make them come on when it's light by covering the sensor
momentarily.

Me too.

I'm surprised so few people have auto lights.

Yeah, me too. Only one of mine isnt, and I was thinking
the other day that I really should have that one auto too.
Tricky tho for the main seat I compute from, I'd need one
that auto turns it on when leaving the bedroom in the
dark as I almost always do even in summer and another
closer to keep it on while its dark. And they arent cheap
at $50. Tho 2 more is no big deal in the total cost.

OTOH the other approach with leds is to just turn
everything on auto at sunset and off at sunrise and
just tell siri to turn them off off when in bed etc.

But I find the built in thermometer useful with the Hues.

And with whether hot and cold taps have the
hot one on the right of the pair or the left.

I can never remember which way round mine are, until I go to use one.
Because when I use one in another house that's the other way round, I
always get it wrong.

Never had any other car that way round.

Yeah, the frogs are much worse for that than most.

They even speak backwards, putting the noun before the adjective.

And some buggers even write backwards.

Muslims.

And some write upside down.

Who?

Like I said, whenever there is more than one way to do it,
you can be sure some will do it one way and some the other.

Yes, there are always morons.

And ******s like you.

That would imply deliberately mis-designing your own product.

Wrong, as always.

In article , steve@walker-
family.me.uk says...

The long mechanical operating systems needed on railways later lead to
preferring the safer failure mode of upper quadrant signals rather than
the alternative lower quadrant ones. Such mechanisms were absent from
road traffic signals.


But, were LQ signals any less safe than UQ? The LQ arm is
pivoted at the centre and the rear part housing the spectacle
glasses is pretty chunky before even allowing for the wweight
of the glass,

It would return to danger even if it bevcame disconnected from
the balance weight at the base of the post. the length of the
rear half of the arm plus the spectacle glass holder behind it
is overall much longer that the front half of the arm so, in
the event of snow, the weight on the rear would still be
greater than on the front.

--

Terry

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