Abstract: A hydraulic apparatus for the operation of an elevator comprises a linearly extending hydraulic cylinder and a piston slidable therein. The piston has on its downstream side a plurality of pivotally interconnected thrust members the last one of which has a slide member which is provided with a support arm with which the slide member passes through a longitudinal slot in the jacket of a linear cylinder extending in a direction parallel to the path of motion of a load receiving device and to which the load receiving device is attached. The linearly extending hydraulic cylinder and the linear cylinder are open at the lower ends and the thrust members depend downwardly at the two cylinders. The thrust members have a continuous toothing and a gear supported rotatably between the two cylinders passes through longitudinal slots in the jackets of the two cylinders and engages with the toothing.

Abstract: An apparatus for retaining guide pulleys for load cables of a building front cable lift in a housing stationarily arranged at the top of a building, from which housing said guide pulleys are outwardly pivotable from ground. In the housing which is open at its face there are supported two beams which are outwardly pivotable horizontally and carry the guide pulleys for the load cables. The beams are retained releasably by means of an interlocking device arranged in the interior of the housing. The interlocking device is releasable by means of auxiliary cables guided on the guide pulleys, said auxiliary cables depending from an edge cutout in the base of said housing.