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MMD > Archives > February 2004 > 2004.02.13 > 07Prev  Next


Earthing & Grounding & Incandescent Lamps
By Mark Kinsler

[ Old vaudeville joke:

  Customer: "Waitress, this coffee tastes like mud!"
  Waitress: "But sir, it was just ground this morning."

 [ Nicholas Simons wrote in 040203 MMDigest:

> Oh, and I could also mention that Swan was the real inventor of the
> incandescent light bulb.  This sort of game gets us nowhere so I'll
> stop now.

Others had designed incandescent lamps -- the idea wasn't new -- but
Edison's work improved them such that they could be used in a practical
lighting system.  Edison and Swan worked it out: I believe that the
British system was known as the 'Ediswan' scheme.

> This can lead to problems where an American instrument uses a direct
> drive induction motor and the belt trick cannot be used.  European
> collectors should beware the Pianolodeon which uses just such a drive.
> The roll drive belt can be altered so that the roll goes through at
> the correct speed, but the fan will still be weak.  Frequency
> converters are very expensive, so you are left with a quiet and
> disappointing novelty.  Anybody want to buy a Pianolodeon?

Are there no modern motors that will fit your instrument?

Mark Kinsler


(Message sent Fri 13 Feb 2004, 16:49:53 GMT, from time zone GMT-0500.)

Key Words in Subject:  Earthing, Grounding, Incandescent, Lamps

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