> Boston Edison used to provide 600 volt DC service for the operation of
>> elevators and cranes. I don't know if they still do.
> I know Milwaukee, WI had DC available at some point in the distant past. I
> used to have a water cooler with a DC motor from downtown somewhere.
> Upper Michigan had 25Hz (cycles/second at the time) at a number of
> copper mining operations, if memory serves.
>> Tom Horne
>> "This alternating current stuff is just a fad. It is much too dangerous
>> for general use." Thomas Alva Edison
> Herb Stein
> snipped-for-privacy@herbstein.com
> [TELECOM Digest Editor's Note: A water cooler with a DC motor is
> interesting; but did you ever see a _refrigerator_ powered by -gas-
> rather than -electricity-? I had one of those in a long since for-
> gotten apartment in Chicago back in the 1960's. No motor of course, no
> compressor, etc, but it was a refrigerator, freezer, etc, and I think
> (cannot remember for sure) it was manufactured by 'Frigidaire
> Company'. Totally silent of course. I have no idea how it worked; if
> I ever knew, I have since forgotten. PAT]
I'll have to make a phone call, but I think a friend of mines girl friend has a gas air conditioner at her house in Farmington MO. I'll have to get back to you on that one.
Herb Stein snipped-for-privacy@herbstein.com
[TELECOM Digest Editor's Note: I have also seen 'air conditioners' which have a position on the switch to put out heat (as well as the usual two or three cool air positions.) PAT]