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The GE 6 Wing Blade 4 Pole 78(x)777 Residence Mystery  Rate Topic 
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 Posted: Thu Mar 15th, 2018 10:43 pm
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Russ Huber
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The GE Category 78(x)777 with steel 6 wing blade is a shaded start 4 pole stator motor that operates at  6 pole stator residence speed. 


Edit: Read Jonathon Moore post to explain how GE cheated modifying the rotor in the category 78(x)777 to slow the 4 pole stator motor down to(or less than) residence 6 pole fan motor speed.  










Attached Image (viewed 528 times):

78x777.png

Last edited on Thu Mar 15th, 2018 11:02 pm by Russ Huber

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 Posted: Thu Mar 15th, 2018 10:47 pm
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Russ Huber
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The 78777 with normal category stamping and basket weave 6 pole residence stator.

Attached Image (viewed 500 times):

Stator Windings78777.jpg

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 Posted: Thu Mar 15th, 2018 10:58 pm
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Russ Huber
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The GE category 78(x)777 with its STEEL six wing blade and modified 4 pole residence fan speed motor would appear to be a victim of war time material shortage?




These were the 3 speeds I clocked on my strobe from a 4 pole 78(x)777 I once owned with the blade free spinning in unrestored condition.


High - 885 RPM


Medium- 830 RPM


Low- 700 RPM 

Last edited on Thu Mar 15th, 2018 11:51 pm by Russ Huber

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 Posted: Fri Mar 16th, 2018 03:19 am
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Jim Humphrey
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Russ,
I've got a V3 78777 with the "x", which someone, I think it was Steve Rockwell but not sure, pointed out that the 8 with x is actually an upside down ampersand &.  He's right I think.  But my V3 runs hot as a 3$ pistol.  I've sort of given up on solving that problem, but I somehow missed the thread that you posted regarding the R5/R9 rotors, and I'm wondering if it hints at something that might solve the overheating problem.  My V3 has that funky two windings that curve around front to rear to make four poles thing going on.  So, what's my point?  I dunno...

Jim

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 Posted: Fri Mar 16th, 2018 05:07 am
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Russ Huber
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Jim Humphrey wrote: Russ,
I've got a V3 78777 with the "x", which someone, I think it was Steve Rockwell but not sure, pointed out that the 8 with x is actually an upside down ampersand &.  He's right I think.  But my V3 runs hot as a 3$ pistol.  I've sort of given up on solving that problem, but I somehow missed the thread that you posted regarding the R5/R9 rotors, and I'm wondering if it hints at something that might solve the overheating problem.  My V3 has that funky two windings that curve around front to rear to make four poles thing going on.  So, what's my point?  I dunno...

Jim

I remember your post and Steve's comment on the ampersand.  I should of been more specific. I sold my 78777 with ampersand to David Foster in recent past.  Now I want it back to experiment and study it.  :D If your V3 has the funky winding, GE by doing so eliminated the use of one poles worth of copper, yet,  the stator technically remained a shaded pole start 4 pole. There is no doubt in my mind the 78777 with ampersand is a war time material chop job.  :D


That fan freaked me out.  I shot WD-40 into her bearings to get the old girl to spin freely, and that she did. That fan ran slower than a 6 pole motor.  Great bedroom fan.  I would love to know what GE did to the rotor in that thing to cut corners on the use of copper. 

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 Posted: Fri Mar 16th, 2018 09:27 pm
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Jim Humphrey
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Russ, I take it you're looking for the four coil stator type motor, but if you want to play with the weird serpentine style I've got I'll send or bring it to you.  Just replaced a couple of parts I'd cannibalized over the years and fired it up, runs nice and slow, minimal speed separation.  Probably would have still gotten warm if I'd run it long enough.  Or, if you'd like, I can pull out the rotor and let you know what it looks like, send pics, etc.  Jim

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 Posted: Fri Mar 16th, 2018 10:08 pm
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Russ Huber
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Jim Humphrey wrote: Russ, I take it you're looking for the four coil stator type motor, but if you want to play with the weird serpentine style I've got I'll send or bring it to you.  Just replaced a couple of parts I'd cannibalized over the years and fired it up, runs nice and slow, minimal speed separation.  Probably would have still gotten warm if I'd run it long enough.  Or, if you'd like, I can pull out the rotor and let you know what it looks like, send pics, etc.  Jim
Very kind of you, Jim, but you hang on to that one.  It's not the first fan that has passed through my hands into another set of hands, nor will it be the last.  :D


I got that one at an auction in central Illinois. I was in shock, I was the only fan collector there and the place was loaded with antique/vintage fans and numerous old electrical devices.  The only real competition I had was an Amish dude with the fans, and I passed on most of them. The GE 78777 was full of crud and out of reach in the middle of a hay wagon and fooled me with its steel blade. To show you how stupid I can be there was a complete GE brass & brass roundback there and it would of taken at least another hour or so to get to it.  I was hungry as h ell and got sick of sitting there after a couple of hours and left.  I bet the Amish dude got the roundback for a song. Before I left the highest bid for a brass fan was $60.00.  Auctions drive me nuts.  :D

Last edited on Fri Mar 16th, 2018 10:15 pm by Russ Huber

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 Posted: Fri Mar 16th, 2018 11:50 pm
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Jim Humphrey
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No problem Russ, and I may get motivated to look at this fan again.  The auctions here in northern/central IL are getting pretty short on pre-1930 fans in general, and if they do come up there are multiple bidders.  The dealers, I normally count on them to drop out at about 50% of what I'd consider a fair price, but there's usually someone that I don't know or recognize as a collector who will run with the bid for a while longer.  But I just don't see many fans for sale anymore.  I got a GE 8" all brass a few months ago, but ended up paying basically full price for it.  I think the last real deal I got was back in 2012 on a 12646 for $192.  But hey, keep us all posted on what you find with the 78&777 when you lay hands on one!

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 Posted: Sat Mar 17th, 2018 03:18 am
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Jim Kovar
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Jonathan Moore wrote:...concluded that the rotors were responsible for the difference of speed between the two fans. 

Notice the difference in bar counts...



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 Posted: Sat Mar 17th, 2018 03:53 am
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Steve Rockwell
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 Posted: Tue Dec 10th, 2019 07:33 pm
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Steve Rockwell
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     Ampersand 8s...


   Also, waddayaknow about the single spring-loaded cap, possibly meant to connect to whatever other device was attached to the stone mounting...




 AND, I need silver spray for the brass terminals and wooden motor mounts, what about Rustoleum bright galvanized spray?






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