Nikola Tesla U.S. Patent 517,900 - Steam Engine Patent Wrapper Page 13

) ( uniformity of action is secured, while the engine ist simple and its weight for a given capacity is very greatly reduced. The reciprocating movement of the piston may be Lo rotary converted, by the ordinary mechanisms motion or it may be utilized and applied in any other manner desired, either directly or indirectly. Pin In another application of even date herewith I have shown and described two reciprocating engines combined in such manner that the movement or operation of one is de pen de nt upon and controlled by the other. In the present case, however, the controlling engine is not designed nor adapted to perform other work then the regulation of the period of the other, and it is moreover an engine of defined charac has he capability of an oscillating movement of constant period. 85