[Milsurplus] Does anybody remember a torque amplifier?

[mac]

To see an operating WW2 system utilizing servo transmitters,  
amplifiers and Amplidynes  see:
<http://www.youtube.com/watch?v=knJ9bgRkFgU>

Dennis D. W7QHO
Glendale, CA



On May 21, 2010, at 6:33 PM, J. Forster wrote:

> An Amplidyne is a motor driven DC generator. The generator field is
> controlled by relatively low power and the output at the brushes has
> considerable power gain from the DC field. All the outpower power  
> comes
> into the system from the drive motor, which can be AC or DC.
>
> In effect, an amplidyne is a modulator.
>
> Many real Amplidynes are two-stage machines hooked in series. The  
> overall
> power gain is the product of the two stage gains. Cleverly, the  
> stages are
> oriented at about 90 degrees of rotation, so are decoupled  
> electrically
> while sharing the same mechanical structure.
>
> -John
>
> ===========
>
>
>
>> What you may be remembering is a form of amplidyne. They were used  
>> in lots
>> of things but most notably on gun turrets. A control stick provided  
>> the
>> signal to control a much larger high torque motor. Search  
>> 'amplidyne' and
>> I think you'll find a lot more information than just tractors.
>>
>> Steve
>> KB4DMF
>>
>>
>> ---- Jim Haynes <jhhaynes at earthlink.net> wrote:
>>> I have a mental image from 50+ years ago of a thing painted OD and
>>> having a motor on it, and an input shaft and an output shaft.  It  
>>> was
>>> called a torque amplifier.  The power was supplied by the motor and
>>> a little bit of effort to turn the input shaft resulted in the  
>>> output
>>> shaft turning the same amount with a lot more torque.
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