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Antique Bi-Polar Motors and Generators Early motors and generators.

Antique Bi-Polar Motors and Generators

Can Someone ID this Motor/Generator


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  #1  
Old 04-30-2018, 09:19:51 PM
Wallysworld Wallysworld is offline
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Default Can Someone ID this Motor/Generator

Hello everyone, I am new to this forum so please bear with me. Found this interesting piece while cleaning out my dad's estate. The building belonged to a family run hardware store dating back to 1890's. We already found a vintage leather sewing machine from 1931 so who knows what decade this might be? Better yet - what is it?

The large marble piece behind the motor has two gauges that say Norton Voltmeter. There was a bunch of knob and tube wiring stuff behind the motor in front of the marble. For some reason the marble pic is upside down.

So far have not found any markings on the unit itself. Can anyone help?
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Old 04-30-2018, 10:22:22 PM
Vanman Vanman is offline
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Default Re: Can someone ID this motor/generator

Ooh, that's NEAT!

That is a direct current machine. It could be used as either a motor or a generator.

These have erroneously been classified in the misInformation age as "bipolar". They are indeed two pole machines. But so are many others. A distinction without a difference, as the saying goes.

Nevertheless, and right or wrong, if you search for that term, you should find lots of information about them in general, and maybe even some information specific to yours.

Here's a baby one that I have:
https://m.youtube.com/watch?v=ML9cCZMPKXs

Keith
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Old 05-01-2018, 10:02:23 AM
Ronald E. McClellan Ronald E. McClellan is offline
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Default Re: Can someone ID this motor/generator

Vanman What is your definition of bipolar motor and dynamo. Ron
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Old 05-01-2018, 11:23:44 AM
Vanman Vanman is offline
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Default Re: Can someone ID this motor/generator

It seems to me that bipolar, in this context, means Two Pole.

So, for instance, here's another bipolar motor. This one is identical to the other except for construction of the field frame.
https://m.youtube.com/watch?v=grFDv2PLq3k
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Old 05-01-2018, 01:35:46 PM
Joe K Joe K is offline
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Default Re: Can someone ID this motor/generator

Looking similar to a Crocker-Wheeler unit of my ownership.

Mine 110VDC, 3 horsepower. Weight about the same as a modern car engine - and only slightly smaller. Here's a pix of similar.



This one at New England Wireless & Steam Museum where it has at times been used to power the incandescent bulb lighting in the engine house.

Note that I say motor - mine is rated as a motor. But generators are IDENTICAL except for the direction of energy.

Yours probably used as a generator - the panel you show seems to show output gauges and "rheostats" (variable resistors) used to control the field current (current through the large bipolar magnets) and thereby control the voltage output (and hence the brightness of lighting attached.)

Panels were frequently made of varnished wood, slate, or even "micarta" (insulating bakelight) Always located where it was dry for obvious reasons.

Joe K
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Old 05-01-2018, 03:07:50 PM
Vanman Vanman is offline
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Default Re: Can Someone ID this Motor/Generator

I was thinking that his rheostat may have been to control voltage as a generator, but then again, it could have been used to control speed as a motor...
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Old 08-13-2019, 10:17:36 PM
dkamp dkamp is offline
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Default Re: Can Someone ID this Motor/Generator

Typically, if it's used in a motoring application, there's a handle that is used to advance the brush timing, to allow the motor to start a heavy load and bring it up to speed gradually, or even throw past center and reverse.

in a generating application, it's set with fixed brushes, and either the field current is modulated (in a DC application) or the armature current is modulated (in an AC application) and the field produces output. The hand-lever is the giveaway.
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