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Old 9th Aug 2020, 10:13 pm   #21
factory
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Default Re: Any sources of info on circa 1880 electric motors?

Quote:
Originally Posted by Ed_Dinning View Post
Hi, the field coil looks intact on that unit and I see it has rocking arrangements for the brushgear.

Possibly come from a showmans traction engine?

Ed
Very unlikely, the early ones were for running electric lighting, have a look at the Gracesguide page; https://www.gracesguide.co.uk/Crompton_and_Co

It mentions dynamos for providing power for lighting in public places as well as posh houses, see the 1882 diagram.

Quote:
Originally Posted by Station X View Post
I think you'd be hard pressed to find an enthusiast possessing a stationary engine dating from the 1880's and capable of driving this.
There are plenty of early gas or oil engines around, you just don't see them at shows often, something around 5 to 6 HP would be suitable to run a 110V 35A dynamo.

David
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Old 10th Aug 2020, 8:37 am   #22
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Default Re: Any sources of info on circa 1880 electric motors?

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Well I have managed to buy it just need to go pick it up.

It's a higher output version of this one.
Good to know you got it Dennis. I for one am looking forward to seeing pictures of the actual item, hopefully followed by a success story at some time in the future.
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Old 10th Aug 2020, 9:52 am   #23
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Default Re: Any sources of info on circa 1880 electric motors?

Early issues of "The Model Engineer and Amateur Electrician contained many articles about dynamos and motors. I've attached an example.
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Old 12th Aug 2020, 7:51 pm   #24
Dennis M
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Default Re: Any sources of info on circa 1880 electric motors?

Here it is, safely back home.
It’s 40” long And 20” high.
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Old 13th Aug 2020, 8:53 pm   #25
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Default Re: Any sources of info on circa 1880 electric motors?

Hi Dennis, I see now the lack of a field winding. You can probably make a bobbin fron SRBP sheet and I might have some brushes that would be suitable if you tell me the dimensions needed

Ed
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Old 14th Aug 2020, 8:59 pm   #26
Dennis M
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Default Re: Any sources of info on circa 1880 electric motors?

Hi Ed, making bobbins should be straightforward.

Brush size is
7/8" * 7/16" * 1 3/8"

Although the brushes look to be usable.
Good news is that the brush holder, springs and spring tension adjusters are good.

Thanks
Dennis
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Old 5th Sep 2020, 5:36 pm   #27
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Default Re: Any sources of info on circa 1880 electric motors?

Well I have the information now to be able to wind a new set of field coils. Bought a couple of old books and one “Dynamo Construction written by Urquhart” from 1895 has info on a “Trial method of determining magnet windings“.
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