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#113652 09/09/02 09:47 PM
Joined: Oct 2000
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[Linked Image]

[Linked Image]
Quote
Thought I'd share this for the nostalgia area. Can anyone date it? The zinc rod is almost disintegrated. Could I replace it with a galvanized bolt? What would make a good electrolyte?

-Dave (Rabbit)

#113653 09/10/02 12:20 AM
Joined: Nov 2000
Posts: 2,236
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Neato!

[Linked Image]


-Virgil
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#113654 09/10/02 09:04 AM
Joined: Aug 2002
Posts: 25
J
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WOW, now I know what I was looking at when I found a flexible metal rod in a junk yard. It was 3 feet long but was fairly decayed or eaten away. It was zinc colored and flexible. I had never held pure zinc so I didnt know what it was. THanks for sharing

#113655 09/10/02 09:43 AM
Joined: Apr 2002
Posts: 2,527
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Your cell is a handsome find, Dave. Thinking out loud—don't think a zinc-plated bolt would give much life, and the iron might contaminate the electrolyte, but maybe that's not the point. When you see a jar one thinks of a flooded lead/sulfuric-acid cell. That would not work here for the acid would dissolve the zinc electrode without any current flow.

The old No.6 1½-volt “dry cell” used a paste electrolyte—may have been partially zinc chloride. In those, underneath a cardboard wrapper was a cylindrical zinc cup about 2½ inches diameter and 6 inches high. There was a 6-32 knurled-brass nut attached to the zinc that was the negative electrical connection [cathode.] The positive/anode connection emerged from the cell top-center with a similar brass nut. The anode was a carbon rod about ¾-inch in diameter; maybe 5½ inches long.

Believe it or not, there is reference to No.6 cells in the 1999 NEC...725-41(a)(5). Have to see if I can find more information about just how your cell is filled/operated, Dave. For you young’uns, the modern equivalent to No.6 cells are Eveready EN-6. They are advertised at ~$11-to-19 each. http://data.energizer.com/datasheets/library/primary/alkaline/energizer/industrial/e n6.pdf




[This message has been edited by Bjarney (edited 09-10-2002).]

#113656 09/11/02 05:30 AM
Joined: Mar 2002
Posts: 360
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One thing you could try, is find a anode rod for a hot water heater, some of them are made of zinc. That would give you a nearly endless supply of zinc for the vintage crystal radio that you are going to use your battery with [Linked Image]

Trainwire

#113657 09/11/02 02:59 PM
Joined: Jan 2002
Posts: 64
R
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I have two more of these. They are missing the zinc completely and are in square jars. All in series should light a 6v bulb for a museum display. More to come.

#113658 09/12/02 01:40 PM
Joined: Aug 2002
Posts: 1,081
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Thanks for sharing the photos.

Try these places for metal (I haven't used their services):
http://www.vertic.fi

http://www.espi-metals.com

Hope that helps some...

[This message has been edited by ThinkGood (edited 09-12-2002).]


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