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Difference Regulator with Worm Gear according to Siemens (1845)
Differenz-Regulator mit Schneckengetriebe nach Siemens (1845)

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The image shows a CAD model of a regulator for steam engines, developed and applied for a patent by the Siemens brothers, which is absolutely different from preliminary centrifugal regulators.
This regulator is based on the difference of the velocity of a circular pendulum and of the velocity of the steam engine, which has to be controlled.
The control mechanism was implemented in remarkably different ways.
Here is shown the solution through a combination of screw and nut, where the screw is realized by means of a worm and the nut by means of a worm gear.

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Mechanisms: Difference Regulator with Worm Gear according to Siemens (1845)
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Time of creation 2014
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