Re: [EVDL] Building a controller yourself
Bill Dennis wrote:
> What was typically used for the shorting bar? Was it a brush?
> Was it a piece of copper held tightly against the bolt heads?
> Or was it something else?
There were several systems. The actual contacts were generally silver.
This could be silver plated copper, or a brass bolt with a silver
contact brazed onto its head.
The moving part could be built the same; if so, it would have some kind
of spring mount to allow it to shift a bit so the two contacts made good
contact. Or, the moving part could be a stack of sheet metal parts that
sweep over the contact somewhat like a squeegee on a window. Or, it
could be a carbon brush like you see for a motor controller. The
solution the designer picked depended on the power level being switched,
and how often he expected it to be moved (wear issues).
Ring the bells that still can ring
Forget the perfect offering
There is a crack in everything
That's how the light gets in -- Leonard Cohen
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net
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