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Hershey: 1900s Electric Charging Rectifier, or parts, searching


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The last one I saw sell took my breath away............that was a complete and working unit in very nice condition. It may be easier to fabricate something. In fifty years of looking around swap meets and auctions, I think I have seen three for sale.

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Thank you gentlemen for your comments...and yes....I know that this is a hard-to-find item.  Just in the hope

that one might be in the back...of someone's garage and they have not thought to bring it out yet.   We can

only hope when we do our searches eh ?   While I believe that my chances are slim, 

they would be zero if I asked nothing.      Cheers....Ken

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Mr pkhammer............fascinating picture.....I ran down and talked to my friend,, who is a lot more clever than I am about 

electrical items.  After looking at the picture he said..."it could be" a battery charger but not sure.,  Requested a picture of the

back of the unit and wanted to know what the label says that is under that big knife switch.  

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  It's a neat piece and I have no real good idea of value. It belongs to a friend of mine. I spied it in his garage and took the photos I posted here. If there is interest in the item I will call my friend and see what he wants for it or if he'd sell it. PM me if anyone would like to discuss.

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  • 2 weeks later...

I have two mercury arc rectifier chargers, one nice and one rough, and I would be willing to sell the nice one to someone to show alongside a vintage EV, since that's where it really belongs.  It only needs some minor cleanup.  The slate lacquer looks great and the reactance at the bottom has minimal rust.  The circuit breaker works, and I have the handle for the starting switch.  I originally thought I would try to make it do something, maybe charge a nickel iron battery with a silicon diode replacing the mercury tube, but it's too nice to mess with and I'm not going to do anything with it.  I'm going to hang on to the rougher one and turn it into a vintage looking modern EV charger.

 

I have the original cables for these as well.  The nice one came with a triangular connector with two exposed flat electrodes, and the rough one came with the round connector with a center electrode.  I've stored them in separate containers to preserve them as much as possible.  To use them, you would need to replace the cloth covered wiring with something like cloth covered modern insulated wiring, but honestly they look better as is and add to the character.  I don't see why the round connector couldn't go with the nice charger.

 

I don't have the mercury filled tubes, but I do have a period mercury tube with one broken electrode, and hence no mercury, that would make the view from the back look correct, and which I would include.  I don't have the top mounted volt-amp meters, but in principal, you could fabricate the bracket and mount a couple of Thompson meters.

 

They are both heavy, in the 300-400 pound range, so if it traveled with a car in a trailer, for example, it would need to be mounted on wheels or a dolly and handled carefully so it didn't take off on you or fall over.  They are currently in my garage in Silver Spring, Maryland, and the nice one would need to be picked up.  I don't want to think what the shipping would be.

 

If you're interested, we can talk and I can send more pictures.  I'm going to ask $1000, but I'm flexible.  I would like to see it go someone who could put it in its proper context.  Since I just joined the forum, I can't message anyone directly yet.  My email is rumpole@mac.com

 

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Richardson electronics in Aurora Illinois (not positive of town but at least near there) may have the tubes for these machines. They were a big supplier of vacuum tubes and other welding equipment tubes and are a big supplier of things like this. 
dave s 

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You will have a heck of a time finding the correct mercury vapor tube. We just paid multi thousands of $ for one for a client of ours. If you  do find a tube you will find it difficult to ship. It is illegal to ship them by UPS, USPS, or Fed Ex because of the 4 ounces of liquid mercury they contain.

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On 10/8/2022 at 3:44 PM, Restorer32 said:

You will have a heck of a time finding the correct mercury vapor tube. We just paid multi thousands of $ for one for a client of ours. If you  do find a tube you will find it difficult to ship. It is illegal to ship them by UPS, USPS, or Fed Ex because of the 4 ounces of liquid mercury they contain.

 

What do the tubes look like?

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