View single post by Steve Stephens
 Posted: Thu Aug 27th, 2015 11:55 pm
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Steve Stephens

Joined: Mon Nov 14th, 2005
Location: San Anselmo, California USA
Russ, I really appreciate you trying to set the record straight in regards to the what is(top switch model) and what isn't (back hanging switch), an Emerson "Meston" fan motor.   Many pages and probably a year earlier I had hashed this out in this thread with the same thinking as you.  

Why would Emerson cast MESTON in the front cover of the hanging switch induction motor if it were not a Meston motor?   I think there is a simple explanation and that is that the front cover for the Meston and for the Induction motor (bronze cased) fan motors was the same, identical casting for both.  The only difference was the an additional matching operation was done on the Meston fan motor cover, i.e. a slot was machined for the top switch to go through the cover.  

In producing the new Emerson Induction motor in 1895 Emerson probably decided to use the same casting for the front cover as they already had the pattern for that casting.  They could have modified the pattern to read INDUCTION MOTOR but, since they were still making the Meston motor, they probably did not want to modify the pattern. 

Having the name MESTON on the front of their new Induction Motor fans would add a well respected name or reference to their new fan motor.   I have no doubt after reading and studying various Emerson catalogs that the Meston was the top switch, infinitely variable speed motor with no brushes or commutator, and the Induction Motor with bronze case and, later, iron case with MESTON cast in the front cover, were not Mestons but were "Induction Motors" with definite speeds and no brushes or commutator.

Here are Russ's photos of the front motor plated used on the Meston and the bronze cased Induction fan motors.  IDENTICAL castings used on two DIFFERENT motors and used by choice of Emerson so as to not have to make a new pattern for the new induction motor (the one with the hanging switch on the back of the motor).