Its copper with two different size holes

[Roger Mn.]

It's copper with two different size holes

This is made of copper and one hole is 1/8 & the other is 3/8 and looks like black paint on it.
It has a copper hammered rivet holding the two pieces together. When folded it's 2 3/8'' and open 4'' by 1 1/4''wide. No markings on it.

 

[traderoftreasures]

Re: It's copper with two different size holes

i've seen this before.... something electrical. maybe electric motor? i'll have to see

 

[traderoftreasures]

Re: It's copper with two different size holes

maybe a swivel for electic wire end to attach

 

[johnnyi]

Re: It's copper with two different size holes

Man, if this get solved I'll be impressed! Does the depression in the upper leaf show anything that might tell if something was glued in? Is it black paint inside for instance? Does the rivet head on the flip side look modern (evenly formed?)

What happens when you put it against a light source and shine light onto a wall with the leaves opened or closed (doing it both ways, front and back and near the light or close to the wall)? Does the circle on the wall change in a way that can tell you something meaningful? (sigh..)

I'm asking you these questions not so much because I realistically believe they may prove fruitful, but mostly because I want to torture you the way you'll be torturing me when I lose sleep over this tonight!

Kidding. I have a hunch it has something to do with light, but that is just a hunch. Is it too crude to be a diaphram for a cheap microscope's light source? Could it have held removable colored filters for a cheap microscope light source?

 

[johnnyi]

Re: It's copper with two different size holes

Add to thst guess the possibility of a fixed two sized diaphram for an early cheap camera

 

[warsawdaddy]

Re: It's copper with two different size holes

My ol' brain just won't bring up the proper name.There is a bolt(pin)smoothe except on one end it is cut down and threaded.This fastener acts as a spacer for something to 'ride' on.In other words,the fastener would hold those sides apart aways and something would ride on the smoothe shank.Is this anywhere close to being clear?Ok,forget it.

 

[johnnyi]

Re: It's copper with two different size holes

"My ol' brain just won't bring up the proper name.There is a bolt(pin)smoothe except on one end it is cut down and threaded.This fastener acts as a spacer for something to 'ride' on.In other words,the fastener would hold those sides apart aways and something would ride on the smoothe shank.Is this anywhere close to being clear?Ok,forget it."

Hell no, I won't forget it! I hear you daddy, but why not spring steel that wouldn't fatigue, and why two different size holes instead of one?

 

[warsawdaddy]

Re: It's copper with two different size holes

The end of the larger smoothe shank acts as a 'stop' against the side.If it was all one size,it wouldn't hold the flanges apart.

 

[warsawdaddy]

Re: It's copper with two different size holes

There are similiar pins like this on some guns.They have the flat head and smaller threaded end.Or is it on fishing reels that I'm thinking about?

 

[Roger Mn.]

Re: It's copper with two different size holes

Add to that guess the possibility of a fixed two sized diaphragm for an early cheap camera

Kathy told me when you have your eye's checked they have different size holes for something. This was found in park woods were there used to be cabens and doctors had partied there in the 1920's and I also thought for an old camera.

 

[johnnyi]

Re: It's copper with two different size holes

roger, I think the fact it was painted black would lend weight also.

 

[Roger Mn.]

Re: It's copper with two different size holes

Man, if this get solved I'll be impressed! Does the depression in the upper leaf show anything that might tell if something was glued in? Is it black paint inside for instance? Does the rivet head on the flip side look modern (evenly formed?)

What happens when you put it against a light source and shine light onto a wall with the leaves opened or closed (doing it both ways, front and back and near the light or close to the wall)? Does the circle on the wall change in a way that can tell you something meaningful? (sigh..)

I'm asking you these questions not so much because I realistically believe they may prove fruitful, but mostly because I want to torture you the way you'll be torturing me when I lose sleep over this tonight!

Kidding. I have a hunch it has something to do with light, but that is just a hunch. Is it too crude to be a diaphram for a cheap microscope's light source? Could it have held removable colored filters for a cheap microscope light source?

 

[Roger Mn.]

Re: It's copper with two different size holes

roger, I think the fact it was painted black would lend weight also.

The black paint is flaking off if it is in fact paint. The rivet is crude and hammered both sides like a copper wire stuck in and flattened.

 

[Dano Sverige]

Re: It's copper with two different size holes

My first thoughts were microscope/camera aperture,good call Johnni...and the Doctors "eye tester" once mentioned,was what i was struggling to think of lol.

 

[Monty]

Re: It's copper with two different size holes

Anode and diode cable ends to a small battery such as a motorcycle? And Pappy, I know the feeling. You can see it in your head but it won't come out of your mouth! Monty

 

[traderoftreasures]

Re: It's copper with two different size holes

Anode and diode cable ends to a small battery such as a motorcycle? And Pappy, I know the feeling. You can see it in your head but it won't come out of your mouth! Monty

yes i've seen on batteries and starters i think

 

[DCMatt]

Re: It's copper with two different size holes

I'm going with camera accessory - to change the aperture. I can't find a pic of anything like it yet, but it would work similar to the pictured camera. On this one, you "dial" the aperture.

I think yours would slip into a bracket to cover the lense.

Just guessing, as usual...

DCMatt

 

[johnnyi]

Re: It's copper with two different size holes

DCMatt, after sleeping on it (ha! right!) I'm more inclined to go with camera this morning. When I was trying to put poor Roger through his paces last night by experimanting with a light source, it was in part to get a handle on how the light would appear on a surface at various distances and combinations of apertures (as well as to punish him!) . What had me a little stumped until this morning was the elevation of the larger hole. How would that affect the light hitting subject (film) if it was a bit farther away? Now I'm inclined to think the elevated aperture (larger hole to allow in more light) was elevated to adjust the size of the image projected onto the film. A larger hole would mean less angle of light, and thus the need to distance the larger hole slightly.

 

[DCMatt]

Re: It's copper with two different size holes

OK, try this. It is called a Waterhouse Stop. Used on cameras to change the aperture. It slides into a slot in the lense housing. Sorry for the pic size...

DCMatt

 

[johnnyi]

Re: It's copper with two different size holes

Matt, you gave it a name! Let's call it a "waterhouse stop" and get some sleep tonight! (until someone throws up something equally as baffling )