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slotalot
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Re: Nixie tubes in slot machines

Postby slotalot » Sun Aug 17, 2014 3:33 pm

badpenny wrote:Nixie tubes must have been a swine to manufacture ... unless someone knows better. !PUZZLED!
Well you did ASK!!!! :D

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operator bell
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Re: Nixie tubes in slot machines

Postby operator bell » Sun Aug 17, 2014 7:09 pm

badpenny wrote:Nixie tubes must have been a swine to manufacture ... unless someone knows better. !PUZZLED!
For you and me, yes, but back in the day when things were still manufactured in the West they were some of the simplest vacuum tubes, just a stack of metal shapes between insulators. Making "ordinary" vacuum tubes was a work of staggering complexity - see this old movie about the Mullard Blackburn works. The full movie is worth watching if you have a half hour to spare.


nixie_side.jpg

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Re: Nixie tubes in slot machines

Postby badpenny » Sun Aug 17, 2014 9:43 pm

Excellent, thanks ...

BP

chris rideout
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Re:

Postby chris rideout » Mon Aug 25, 2014 9:01 am

whoop-john wrote:Nixies were first made by Burroughs, in the UK, and called provisionally 'Numerical Indicator eXperimental 1'. It looked like NIXI. By the time they hit the streets in the early 1950s they were already known as nixies and the name stuck.
Was Burroughs the computer company in the 1960s/early 1970s when they still had open reel tapes for storage because hard drives were not invented or still in the development stage? As for the machine, did the numbers change as it paid out? In the days when I wore short trousers, I seem to recall the coins being spat out 1 or 2 at a time and, as they did, the display would hit another random number. Was the machine faulty or was this normal operation?

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operator bell
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Re: Re:

Postby operator bell » Mon Aug 25, 2014 9:53 am

Chris Rideout wrote: seem to recall the coins being spat out 1 or 2 at a time and, as they did, the display would hit another random number. Was the machine faulty or was this normal operation?
That would be entirely consistent with machines of that type. The numbers were flashed with a surplus Post Office uniselector, and the same uniselector was used to count out the prize, so it necessarily stepped off the winning combination. The Roto-Pool series of games did the same thing, and after seeing the insides of that nixie bandit I wondered if they weren't the work of the same designer.

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Re: Nixie tubes in slot machines

Postby treefrog » Mon Aug 25, 2014 9:59 am

Got the nixies working on mine with a pair on new bulbs. Just need to get the rest of the machine working.
noxie-a.jpg

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slotalot
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Re: Nixie tubes in slot machines

Postby slotalot » Mon Aug 25, 2014 3:23 pm

Hi Tom, looking good !!THUMBSX2!!
Do the numbers change if you step the uni-selector round by hand?? !PUZZLED!

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Re: Nixie tubes in slot machines

Postby coppinpr » Wed Aug 27, 2014 9:26 pm

Seeing the film of Mallards factory in Blackburn reminded me of a story my mother told me about that factory.
When the war started she decided to take a job helping the war production and took a job at Mallard's Mitcham factory just outside London making valves for aircraft radios. When the bombing got bad later in the war that factory became a constant target and mallards moved production and their Mitcham staff to Blackburn.
On her first day there the air raid siren went and as they had done in London the Mitcham girls got under their heavy machines for protection, the Blackburn girls thought this very funny, they had never had a raid in Blackburn at that time and used the siren to signal their tea break. :lol:

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Re: Nixie tubes in slot machines

Postby pennymachines » Thu Aug 28, 2014 8:54 pm

Here's the Golden Mint by Sturgeon Electronic Manufacturing Co. Ltd. of Bognor-Regis, Sussex, Circa 1970.


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operator bell
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Re: Nixie tubes in slot machines

Postby operator bell » Thu Aug 28, 2014 11:22 pm

Basically the same machine with three tubes instead of two, but still only one uniselector. Interesting confirmation there at the end when it steps off the winning combination as it pays out.


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