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Don't know if it's an eyepiece or spinthariscope

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#1 RichA

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Posted 19 September 2021 - 12:53 AM

It's essentially a Ramsden configuration but it focuses to a point inside the housing.  Spinthariscopes were popular around the turn of the century they were an eyepiece used to see the fissioning of zinc sulfide atoms (they emit visible light photons) under bombardment by alpha particles (helium nucleus) emitted by radioactive radium.  The zinc screen and small amount of radium were position on the bottom inside of the magnifying loupe.  You would dark-adapt in a room and view the dim fissioning through the eyepiece. The cluster of fissioning atoms appears something like a 10th magnitude galaxy in an 8 inch scope.  The diameter  of this eyepiece is 40mm. 

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Edited by RichA, 19 September 2021 - 02:29 AM.

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#2 Taosmath

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Posted 19 September 2021 - 01:09 AM

Interesting item - is that a spring wound onto a cylinder to give a helical focus adjustment?



#3 RichA

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Posted 19 September 2021 - 02:28 AM

Interesting item - is that a spring wound onto a cylinder to give a helical focus adjustment?

No, it's a thread, with a course pitch.


Edited by RichA, 19 September 2021 - 02:28 AM.


#4 Terra Nova

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Posted 19 September 2021 - 07:54 AM

The Gilbert Atomic Energy Lab is a set that I wanted as a kid but never did get. I guess Santa didn’t think it a safe toy for a child. Anyway, it came with a working spinthariscope: 

 

https://www.acghs.org/?p=4848

 

(IIRC, one of the top tier Gilbert or Porter chemistry sets came with one also.)

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#5 highfnum

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Posted 19 September 2021 - 04:21 PM

they should bring those toys back

you can learn a lot from them

 

treads eyepiece still around 

 

mostly used to look at close in objects

 

eyeloop.jpg


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#6 RichA

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Posted 19 September 2021 - 06:36 PM

The Gilbert Atomic Energy Lab is a set that I wanted as a kid but never did get. I guess Santa didn’t think it a safe toy for a child. Anyway, it came with a working spinthariscope: 

 

https://www.acghs.org/?p=4848

 

(IIRC, one of the top tier Gilbert or Porter chemistry sets came with one also.)

Worth a lot of money for one of those today.


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#7 Kasmos

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Posted 21 September 2021 - 02:59 PM

The Gilbert Atomic Energy Lab is a set that I wanted as a kid but never did get. I guess Santa didn’t think it a safe toy for a child. Anyway, it came with a working spinthariscope: 

 

https://www.acghs.org/?p=4848

 

(IIRC, one of the top tier Gilbert or Porter chemistry sets came with one also.)

Terra, You were always a bit different. wink.gif

 

You were 'supposed' to ask Santa for something like...

Easy B.jpeg


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#8 Terra Nova

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Posted 21 September 2021 - 05:09 PM

Terra, You were always a bit different. wink.gif

 

You were 'supposed' to ask Santa for something like...

attachicon.gifEasy B.jpeg

He brought it anyway! 4.gif
 

Seriously tho, I did have a child’s electric oven. It was bigger than an easy bake. I think it was this one or very much like it. A lot of my Christmas toys came from Sears and this one is from the 1957 Wishbook. I think I got mine for Christmas in 1955? I had a lot of fun with it and it inspired a lifelong enjoying of cooking. I remember having an ice cream make too that really did make ice cream. That was a lot of fun!

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Edited by Terra Nova, 21 September 2021 - 08:46 PM.

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#9 clamchip

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Posted 21 September 2021 - 06:12 PM

I owned the Suzie Homemaker oven.

I couldn't wait the required time for the cake to cook so I just ate the mix raw.

Chocolate cake it was.

 

Robert 


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#10 Littlegreenman

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Posted 21 September 2021 - 07:01 PM

Terra, You were always a bit different. wink.gif

 

You were 'supposed' to ask Santa for something like...

attachicon.gifEasy B.jpeg

My first girl friend had something like that. She never made me any brownies. She preferred kissing me under a castor bean plant.

Ah, to be 8 again!


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#11 Kasmos

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Posted 22 September 2021 - 12:00 AM

I owned the Suzie Homemaker oven.

I couldn't wait the required time for the cake to cook so I just ate the mix raw.

Chocolate cake it was.

 

Robert 

funnypost.gif Your first sentence made me laugh out loud! 

 

How did that come about, did you ask for it?


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#12 steve t

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Posted 22 September 2021 - 07:30 AM

After 40+ years, my wife and I still refer to the microwave as our East Bake Ovenlol.gif

 

Back in the 60's I had a Gilbert chemistry set with all the stuff mounted in racks. Had great fun doing experiments, but it came to an end when I spilt a concoction that stripped the finish off the bedroom floorfrown.gif


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#13 clamchip

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Posted 22 September 2021 - 09:41 AM

funnypost.gif Your first sentence made me laugh out loud! 

 

How did that come about, did you ask for it?

Yes I did.

My grandma and grandpa would visit from England (mom's side) and anything my brother and

I wished for they would buy for us.

I also owned a English baby pram I would haul my rocks and minerals and fossils around in, much

better than a wagon.

It didn't last long, a GI Joe doll and then I discovered wood and metal shop.

 

Robert


Edited by clamchip, 22 September 2021 - 09:46 AM.

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#14 DreamWeaver

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Posted 22 September 2021 - 08:07 PM

a GI Joe doll...

 

Robert

They were “action figures” Robert.  wink.gif


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#15 Terra Nova

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Posted 22 September 2021 - 09:39 PM

They were “action figures” Robert.  wink.gif

:lol:




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