electro-Physics: 17.3409 volts

From: Jules Richardson <julesrichardsonuk_at_yahoo.co.uk>
Date: Mon Dec 13 16:57:05 2004

On Mon, 2004-12-13 at 17:25 -0500, William Donzelli wrote:
> > >> Old elevators. Lots of old elevators.
> >
> > Patrick> And, lots of not-so-old elevators.
> >
> > Some machine tools, too.
> >
> > I remember seeing a large planer -- 12 foot stroke, roughly -- that
> > used a DC motor for the bed drive. The idea was that you would get
> > the back & forth motion of the bed by throwing the motor from forward
> > into reverse or vice versa at each stroke endpoint.
>
> I think the original question concerned devices that were originally made
> to hook up to the DC grid.

I have a feeling that a lot of trams and trolleybuses over here at least
ran on DC, presumably for traction and speed control reasons. Whether
they were candidates for being supplied by a DC grid or whether rotary
converters were always used, I don't know.
Received on Mon Dec 13 2004 - 16:57:05 GMT