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What its For?
Posted: Tue Nov 21, 2023 8:14 pm
by TRDxB2
The 2 posts in the back and patent number, 1970889, would indicate that its an ammeter . Label reads do not charge over 7 amps if only one bulb is charging. Then it has two dials for a left and the other right bulb
Re: What its For?
Posted: Tue Nov 21, 2023 8:33 pm
by Mark Gregush
Battery charger that used 2 rectifier tubes maybe.
For example, the KR Wilson used for charging magnetos and batteries had 2 rectifier tubes that depended on what operation it was doing, could use one or both. It does not have that gauge but just a suggestion.
Re: What its For?
Posted: Wed Nov 22, 2023 11:34 am
by Susanne
You might be right, they were mercury bulb rectifiers, and if one out of 2 had failed you would overamp the remaining bulb. I think.
Re: What its For?
Posted: Sun Nov 26, 2023 11:20 am
by DanTreace
Patent number led to this battery charger. That meter is featured in the patent drawing too.