Device for power transmission - with a drive plate, a support plate and an output plate, each having in a region around its center a rotatable mount, with which they are arranged rotatably on a central axis one above the other - wherein a first main slide rail is arranged on the support plate spaced from the rotatable mount of the support plate, having a rigid part, which is firmly connected to the support plate, and a moving part, which is movable relative to the rigid part in the direction of the longitudinal axis of the first main slide rail, - with a first drive train element, characterized in that the first drive train element is rotatably connected at a first end by means of a first drive train connecting element to the moving part of the first main slide rail and at a second end by means of a second drive train connecting element to the drive plate, wherein the device furthermore comprises - a first counterforce element, which is arranged such that in case of a predetermined driving force acting on the first drive train element a counter force on the moving part of the first main slide rail is generated by means of the first counterforce element, such that the total force from the driving force and the counterforce acting on the first main slide rail exhibits both a parallel and a vertical component to the longitudinal axis of the first main slide rail, and leads to a rotational movement of the support plate connected to the first main slide rail in a predetermined direction of rotation, - a first power transmission element arranged on the support plate so as to cause a rotational power transmission connection on the moving part of the first main slide rail during the rotational movement of the support plate, and - a first output element that is connected with a first end to the output plate and is arranged such that during the rotational movement of the support plate an output power transmission connection exists from the moving part of the first main slide rail to the first output element. - with a drive plate, a support plate and an output plate, each having in a region around its center a rotatable mount, with which they are arranged rotatably on a central axis one above the other - wherein a first main slide rail is arranged on the support plate spaced from the rotatable mount of the support plate, having a rigid part, which is firmly connected to the support plate, and a moving part, which is movable relative to the rigid part in the direction of the longitudinal axis of the first main slide rail, - with a first drive train element, - a first counterforce element, which is arranged such that in case of a predetermined driving force acting on the first drive train element a counter force on the moving part of the first main slide rail is generated by means of the first counterforce element, such that the total force from the driving force and the counterforce acting on the first main slide rail exhibits both a parallel and a vertical component to the longitudinal axis of the first main slide rail, and leads to a rotational movement of the support plate connected to the first main slide rail in a predetermined direction of rotation, - a first power transmission element arranged on the support plate so as to cause a rotational power transmission connection on the moving part of the first main slide rail during the rotational movement of the support plate, and - a first output element that is connected with a first end to the output plate and is arranged such that during the rotational movement of the support plate an output power transmission connection exists from the moving part of the first main slide rail to the first output element.