[Milsurplus] Does anybody remember a torque amplifier?

[Jim Haynes]

On Fri, 21 May 2010, J. Forster wrote:

> That's nothing but a common position servo.
>
> Any reduction gearbox if a "torque amplifier". However, the price for
> amplifying the torque is reduced angular travel.
>
> Output Torque x Output Angle < Input Torque x Input Angle
>
Yes, but the device I remember is not a common gear box, but a true
torque amplifier.  The motor mounted on the unit supplies the power.
Input angle = output angle with a lot more torque.  And I believe it's
all mechanical, but might have involved slipping clutches or something.
I didn't see the interior.  Guess I need to go look at some ancient
mechanical engineering text books.