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Publication of ES290337A3publicationCriticalpatent/ES290337A3/en
VARIABLE TRANSFORMER, having a helical winding and an operable brush on the winding, a control mechanism for the brushes for moving the brush is a helical path for engaging only one turn of the winding once comprising a pair of ring parts spaced separately mounted for rotation, a screw rod extending between the pieces and having an advance substantially equal to the advance of the winding, a brush holder formed with a threaded opening through which the screw rod is screwed, a third ring mounted for rotation on an axis eccentric to the axis of the other rings, a pin carried by the third ring and a joint joined between the pin and the screw rod to hold the screw rod stationary about its longitudinal axis when it rotates about the winding, and means for rotating the rings, by means of which the brush holder is caused to move in a t helical trajectory in contact with only one turn of the winding at one time in all its movement limits. (Machine-translation by Google Translate, not legally binding)
ES0290337A1959-07-211963-07-26Variable transformer (Machine-translation by Google Translate, not legally binding)
ExpiredES290337A3
(en)