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Generators & Electric Motors General Discussion

early Holtzer-Cabot "tombstone" AC electric motor


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  #1  
Old 03-05-2019, 07:20:10 PM
Brent Rowell Brent Rowell is offline
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Default early Holtzer-Cabot "tombstone" AC electric motor

Recently purchased this early H-C electric motor, sometimes referred to as the 'tombstone' model. The same motor was offered either as a fan or utility motor. Since this is an AC motor, was wondering if H-C had any patent infringement disputes with Westinghouse/Tesla? Haven't tried to run it yet and was going to try 50V with a Variac. Suggestions welcome.
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  #2  
Old 03-05-2019, 08:51:40 PM
Vanman Vanman is online now
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Default Re: early Holtzer-Cabot "tombstone" AC electric motor

Wow, that's a neat one. Is that a series motor or repulsion motor? If the latter, and since it is designed for 133 cycles, I would drop the voltage by the ratio of 60/133. So maybe 20 ~ 25 volts. Start there and see how it does. I'd have an ammeter in the circuit too.

Keith
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Old 03-05-2019, 10:31:51 PM
Steve Dawkins Steve Dawkins is offline
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Default Re: early Holtzer-Cabot "tombstone" AC electric motor

That is one awesome specimen of a motor. Nice find! Never seen 133 Hertz. (or cycles, as it was referred to at the time.)
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Old 03-06-2019, 07:46:04 AM
Brent Rowell Brent Rowell is offline
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Default Re: early Holtzer-Cabot "tombstone" AC electric motor

Thanks. I'm told it is an 'induction-repulsion' motor. So no conflict with Tesla and Westinghouse?
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Old 03-06-2019, 10:39:29 AM
Radiomike Radiomike is offline
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Default Re: early Holtzer-Cabot "tombstone" AC electric motor

As it is 133Hz you should reduce the voltage. The impedance is proportional to frequency, at 133 it will be a little over twice that at 60Hz.

Mike
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Old 03-06-2019, 11:02:24 AM
Ronald E. McClellan Ronald E. McClellan is offline
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Default Re: early Holtzer-Cabot "tombstone" AC electric motor

Brent I had one like it a long time ago , but sold it. Could be the same one , don't know. Did this one come from Texas? Ron
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Old 03-06-2019, 01:41:36 PM
BHoward BHoward is offline
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Default Re: early Holtzer-Cabot "tombstone" AC electric motor

Are you sure it,s 133 and not L 33. When I was a kid we had 25 cycle. Just a thought . Bill H.
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Old 03-06-2019, 01:53:14 PM
georgineer georgineer is offline
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Default Re: early Holtzer-Cabot "tombstone" AC electric motor

Just a thought to kick about, and probably not relevant, but 133 is one third of 400 (ignoring decimal fractions), which is used in some applications.

George
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Old 03-06-2019, 05:14:16 PM
Brent Rowell Brent Rowell is offline
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Default Re: early Holtzer-Cabot "tombstone" AC electric motor

It's definitely 133 cycles 52 volt AC.
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Old 03-06-2019, 07:16:01 PM
Vanman Vanman is online now
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Default Re: early Holtzer-Cabot "tombstone" AC electric motor

133 was one of many that existed once upon a time.
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Old 03-17-2019, 08:22:34 AM
Brent Rowell Brent Rowell is offline
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Default Re: early Holtzer-Cabot "tombstone" AC electric motor

Anyone have further thoughts on running the motor or why it didn't violate Tesla's (Westhinghouse) AC motor patents?
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