Russ Huber Posted November 24, 2023 Share Posted November 24, 2023 If these mid-teens GE Twin Blower gyros had centrifugal mechanism starting BMY AC motors that is a heads-up GE was still manufacturing them for special purpose beyond 1911. If so, they may have been supplying AB/Jandus with GE BMY centrifugal start motors into the mid-teens. 1 Quote Link to comment Share on other sites More sharing options...
Lane Shirey Posted November 24, 2023 Share Posted November 24, 2023 Why did they continue with the centrifugal with the gyros? Maybe due to the simplicity of the 2 headwire simplicity? Quote Link to comment Share on other sites More sharing options...
Russ Huber Posted November 24, 2023 Author Share Posted November 24, 2023 2 hours ago, Lane Shirey said: Why did they continue with the centrifugal with the gyros? In the 1911 GE fan motor bulletin it was announced the centrifugal start mechanism was abolished due to its problems and failure issues. I did not say GE continued to make them for special order. Why? I don't have the proof until someone here can produce or validate an ALTERNATING current example of the teens GE Twin Blower ceiling gyro. If I am not mistaken, I see a brush cap which would make this a DC example. Are there any AC examples to surface? If so, how do the motors start? Quote Link to comment Share on other sites More sharing options...
Russ Huber Posted November 24, 2023 Author Share Posted November 24, 2023 Electrical trade and catalogue so far only supports the season of 1915 for the patented GE Twin Blower gyro. 1 Quote Link to comment Share on other sites More sharing options...
Russ Huber Posted November 24, 2023 Author Share Posted November 24, 2023 Does anyone have a GE AC Twin Blower gyro model with centrifugal start BMY motors? Could you please validate how the motors start? Quote Link to comment Share on other sites More sharing options...
Steve Rockwell Posted November 24, 2023 Share Posted November 24, 2023 33 minutes ago, Russ Huber said: Electrical trade and catalogue so far only supports the season of 1915 for the patented GE Twin Blower gyro. Profile Struts, SMY in the 12-inch size. 2 Quote Link to comment Share on other sites More sharing options...
Russ Huber Posted November 24, 2023 Author Share Posted November 24, 2023 10 minutes ago, Steve Rockwell said: Profile Struts, SMY in the 12-inch size. Thank you, Steve. That looks like a 3-wire braid sheathed head cord. If so, somewhere in that contraption is a starting coil, or a wall mounted switch/coil. You have validated SMY motors. It is looking as though the centrifugal switch BMY motor was out of the picture for this one. Quote Link to comment Share on other sites More sharing options...
Russ Huber Posted November 24, 2023 Author Share Posted November 24, 2023 Not much support for the 1914 model being on the market in 1914. Nothing in the 1914 GE fan motor catalogue link below. Electric fans 1914. : General Electric Company. : Free Download, Borrow, and Streaming : Internet Archive Quote Link to comment Share on other sites More sharing options...
Russ Huber Posted November 24, 2023 Author Share Posted November 24, 2023 Shaw filed the patent for the Twin Blower in Sept. of 1914. That is kind of late in the year for a 1914 manufacture. 1 Quote Link to comment Share on other sites More sharing options...
Russ Huber Posted November 24, 2023 Author Share Posted November 24, 2023 (edited) Bingo! If you go down to the 3rd page starting with the first patent description page, go to reference 30 on the Shaw patent link below. Number 44 in the patent image is a starting coil for the AC model. The GE Twin Blower AC gyro consists of coil assisted start GE 3 wire head cord SMY motors. 1498387795853993044-01295618 (storage.googleapis.com) Edited November 24, 2023 by Russ Huber 2 Quote Link to comment Share on other sites More sharing options...
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