Abstract: The invention refers to a device for increasing the efficiency of any rotary power generating system with progressive variation, whose planetary system may have two or more pairs of pinions, or/and satellites with any multiplication/demultiplication ratio with respect to the central pinion, characterized in that it consists of an assembled inner box, A, which is assembled axially in an assembled outer box, B, to which an assembled side box is axially fixed, C; assembled inner box, A, made of a primary drive shaft, (1), C having a flange, by means of which the shaft is oriented and fixed on a cover, (2), in which, axially, is assembled a bearing, (3), and radially, in some bosses, a, processed cylindrically, are fixedly assembled some bearings, (4), in which, with a shoulder, conventionally right, son satellites, (15), are assembled, each of which, on a median shoulder, has assembled a bearing, (4?); axially, in the bearing, (3), is assembled an intermediate pinion, (6), which, to the left of its toothed crown

Abstract: The invention refers to a retractable a retractable modular partition wall that may be used to partition residential spaces, or it may operate as a garage door that is mounted on two parallel walls of a premises and consists (FIG. 1.1) of an assembled left-side runway. A, that is fastened with the aid of the some known fastening elements, such as dowels and screws, on the conventionally left wall of the premises, an assembled right-side runway, B, mirroring the left-side runway, A, and which is fastened with some known fastening elements, such as dowels and screws, on the conventionally right-side wall of the premises, a drive mechanism. C, and several assembled movable panels, D.