Sidelit displays - Wales UK

[Mike Harrison]

Spotted this - not my listing.

http://www.ebay.co.uk/itm/Vintage-Digital-Voltmeter-Type-DM2022S-/230964182288?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item35c689bd10

I "Reviewed" one of these a while ago : http://www.youtube.com/watch?v=4xrcBoe_x04

[threeneurons]

Edge lits are great !

Its the one technology that can be replicated in your own garage. Plus 10 layers of acrylic will stop a bullet. At least a 25 auto.

http://www.ebay.com/itm/230964182288

[Nick]

On Wednesday, 17 April 2013 05:15:38 UTC+1, threeneurons wrote:

10 layers of acrylic will stop a bullet. At least a 25 auto.

Not sure about that - 10 layers of polycarbonate, maybe - acrylic is very brittle and a 25ACP should go through 10 layers ok - the individual sheets are extremely thin.

I don't have a .25ACP, but have a .22LR - 25ACP is betwen 85J and 130J depending on load etc., and a .22LR sub-sonic is about 140J, so very comparable...

Might give it a go... (not on a real display - I have both 0.5mm polycarbonate and acrylic sheet)

Nick 

[Tidak Ada]

Polycarbonate isn't brittle. It is even bullet proof and used in bulletproof windows

 

eric

---

From: neoni...@googlegroups.com [mailto:neoni...@googlegroups.com] On Behalf Of Nick
Sent: woensdag 17 april 2013 11:05
To: neoni...@googlegroups.com
Subject: [neonixie-l] Re: Sidelit displays - Wales UK

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[Nick]

On Wednesday, 17 April 2013 11:15:07 UTC+1, Tidak Ada wrote:

Polycarbonate isn't brittle. It is even bullet proof and used in bulletproof windows

 

If you'd read my post you'd see that I said "acrylic is very brittle" - polycarbonate (e.g. Lexan) is the bulletproof stuff - polycarbonate and acrylic are two different things.

Nick

 

[JensG]

Here is a display:  "General Radio IND-1803 Numerik Indicator"
http://www.decadecounter.com/vta/articleview.php?item=1093

Jens

[Jens Grabner]

Here ist a display:  "General Radio IND-1803 Numerik Indicator"
http://www.decadecounter.com/vta/articleview.php?item=1093

Jens

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[Quixotic Nixotic]

Nick, is there something about you we should know? I am worried.

John S

[GastonP]

We now know that we must be careful not to upset him :D

[Adam Jacobs]

I was trying to explain this phenomena to a Canadian friend of mine. Guns are a cultural thing in the US. If you're not originally from here, it may not be something that makes a lot of sense... but it's just part of normal. I own some guns as well. Most americans I know own guns. 

My Canadian friend told me that people _do_ own guns in Canada, but only if they have a justifying reason.. Like for example, if they are in possession of a valid hunting license... and then, they'll own the guns appropriate for that license. 

Here, in this country, people own guns just because they're a fun hobby. I suspect that Nick (based on his comments regarding grain) may also be into reloading. Lots of folks enjoy that part of the hobby as well. Neither of the ammunition types Nick mentioned would arouse comment in this country. .22LR is the most common bullet in the world. I have a .22LR bolt-action rifle in the closet, my kids and I use it for "plinking". I also own a vintage P38 which loads 9mm ruger, that weapon is actually an heirloom and I don't use it very often. I own very few guns in comparison to many of my friends.

Anyways, sorry for the long post, just thought that I would give an american cultural explanation. :)

-Adam

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[Quixotic Nixotic]

On 21 Apr 2013, at 18:48, GastonP wrote:

> We now know that we must be careful not to upset him :D

Nicko, next time I visit what's say we line up that crate of CD 47s and shoot the blue bejasus out of them in slomo with a .303? Or shall I just trip over that box of panaplexes again?

It's actually really hard to upset Nicko, he's one of the most generous and kind-hearted people I have ever had the privilege to meet. He doesn't choose to suffer fools gladly, but somehow Nick has been the epitome of kindness to me, as has his delectable wife. I am not sure why. Luck I guess.

My ignorance of electronics knows no bounds, but Sir Nicko de Smith has been patient enough to explain to me without sarcasm the most elementary things that would probably try the patience of a trappist monk. For this I personally thank him... and for keeping this group together.

I am grateful too for the generosity and help from many group members. I really do think this group has an extraordinary membership and I have been encouraged to engage in electronic exploration that otherwise I don't think I would ever have contemplated. Thank all of you.

If you have a germ of an idea, there is always someone here generous enough to help you realise it,

John S

[Nick]

On Sunday, 21 April 2013 18:48:34 UTC+1, GastonP wrote:

We now know that we must be careful not to upset him :D

It takes an awful lot to upset me, really ! BTW, I'm English and live in the countryside - I used to do .22 and full bore target shooting because my mother was a nation level competition shot, but for the last 25 years I've just shot clays ("sporting" & "skeet") and the occasional pheasant, walked-up with the dogs. The .22 is used for vermin control - mainly the odd rabbit. I actually really don't like killing things at all... The whole concept of "driven" game shoots, for instance, I could never do - for a start there is no sport in it, and secondly its cruel beyond belief.

We have a basic rule in the house - if you shoot an animal, generally you have to eat it - I say "generally" as if you kill a diseased animal for humane reasons, e.g. a rabbit with myxomatosis, then that's allowed.

Having spent many years as a range safety officer (and having seen an accident or two), I never even let our kids have toy guns as the idea of pointing even a plastic gun at a person is completely alien - consequently I'm very very pro gun control and paranoid about safety.

FWIW, I never got into the "reloading" thing - far too intense !

Nick

[Lars Aronsson]

Hi group,

Does anyone here know when edge-lit displays were introduced?
There are two Swedish computer consoles, allegedly built in
1953 and 1956, which use these. Could you buy edge-lit hexadecimal
digit displays as a component back then? Or were these fitted
later? Or were they home-built?

The 1953 computer BESK, whose console can be seen at Stockholm's
Museum of technology (Tekniska museet), is shown here,
http://en.wikipedia.org/wiki/Lightguide_display

The 1956 "Facit EDB" was a copy of BESK. Its console can
be seen at Datamuseet in Linköping, south of Stockholm.
It looks very similar.

Wikipedia's article on nixie tubes says they were introduced in
1954, so they could not have been an option for the 1953 BESK.

[Christian Bjelle]

Image of (part of) Facit EDB-console below 

//c

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[threeneurons]

Here's some references from Randall Logan's site:

http://www.scientificsolutions.ca/patents.htm

http://www.scientificsolutions.ca/Display%20Patents/Edge%20Lit/US2751584.pdf

A single lit plate, such as an "exit" sign, goes back to 1914, but the multiplate 10 numeral digit, was applied for, in 1954. That, however, was in the U.S. It doesn't address patents in other countries.

[Lars Aronsson]

On Thursday, April 25, 2013 8:07:05 PM UTC+2, threeneurons wrote:

Here's some references from Randall Logan's site:
http://www.scientificsolutions.ca/patents.htm

A single lit plate, such as an "exit" sign, goes back to 1914, but the multiplate 10 numeral digit, was applied for, in 1954. That, however, was in the U.S. It doesn't address patents in other countries.

Thanks! I've updated the Wikipedia article with this,
http://en.wikipedia.org/wiki/Lightguide_display#History

It seems like the Swedish display from 1953 must have been
home-made. The large distance between each digit is perhaps
a give-away. A commercially sold component would have been
made more space efficient.