View single post by Jim Humphrey
 Posted: Mon Sep 7th, 2020 02:31 pm
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Jim Humphrey

Joined: Tue Dec 13th, 2005
Location: Geneseo IL
Just a quick question, Mark McCormick posted in BST to buy an early Dayton, which caused me to look at my notes on the Dayton Type 50 I've got.    My question is how does the Type 50 start using only two headwires, but does not have the traditional shaded pole I'm used to seeing and doesn't use a centrifugal switch either.  I think it involves some extra stator coils, but just wanted some confirmation or explanation.  Here's a pic of the stator arrangement, and I think there are two innermost coils at roughly the 1 o'clock and 7 o'clock positions, plus four additional coils at the 2, 4,8,and 10 o'clock positions.  Finally, there are the four main stator coils at the 3, 6, 9 and 12 o'clock positions.
My theory is that instead of using the heavy straps/bars of the "traditional' shaded pole system, Dayton put in some additional coils to provide an asymmetrical magnetic field to get the motor to self start.  Probably more expensive than a regular shaded pole system, but maybe they had patent problems?

Here's the pic: