Abstract: A hybrid drive assembly includes an internal combustion engine as a first drive machine having a first drive shaft, an electromechanical energy converter as a second drive machine having a second drive shaft, a switchable traction transmission device with a first transmission input shaft selectively connected to the first drive shaft, and a second transmission input shaft connected to the second drive shaft. The traction transmission device has an input planetary gear set having at least three transmission shafts, an input sun gear shaft, an input ring gear shaft, and an input planet carrier shaft. One of which is the first transmission input shaft, with a first torsional vibration reducing device arranged between it and the first drive shaft. Another of which is the second transmission input shaft, with a second torsional vibration reducing device arranged between it and the second drive shaft.

Abstract: Prefabricated prestressed concrete members are formed on a stressing bed with a number of working stations arranged next to one another along the length of the bed. A frame froms the working stations and the frame is movable over the stressing bed. With a previously poured concrete member in one of the working stations, part of a form is placed in another working station and is filled with concrete. After the form part is completely filled and consolidated, a second form part is placed downwardly on the filled part completing the form. A lifting member on the frame which placed the second form part on the filled part is then moved to the station containing the previously poured member which is still within the form. The form is stripped from the concrete member and the frame is then moved along with the lifting member returning the stripped form to the working station where it is to be filled with concrete.

Abstract: An apparatus for continuously producing finished prestressed concrete wires along a prestressing bed with a plurality of prestressing members which extend along the prestressing bed and which are arranged to pass through the concrete members when formed. The apparatus includes a scaffold which spans the prestressing bed in a gantry-like fashion and is supported for movement in a direction parallel to the bed. The scaffold extends over at least two adjacent stations along the prestressing bed for producing the finished prestressed concrete members. A number of vertically movable lower form members are carried on the scaffold for movement to a lowered position on the prestressing bed for receiving fresh concrete to form the concrete members. After the concrete members are formed and bonded the lower form member may be raised away from the finished concrete member.