Abstract: Heat insulations in houses having card-board lattice arranged behind a glass pane yield, in practice, a heat flow which is dependent on insolation. Said heat flow is lower at night and during weak insolation and begins to increase when the lattice is solar heated. The inventive solar cell (1) comprises a lattice (5) which is situated behind a rear-ventilated glass pane (2) and which exhibits durable storage properties. The solar cells characterize a solar energy yield (v′) by an arrangement which selects for an angle of incidence. Said solar energy yield does not lead to overheating in the room interior (R) also when the sun is at a high position. A thermal time constant is obtained by means of heat insulations (11, 12, 13) which are connected in succession. Said time constant guarantees comfortable temperatures in the interior (R) of the house also in the case of low supplementary heating.

Abstract: Machines having torques variable as a function of the angle of rotation such as piston driving mechanisms like compressors, cam driving mechanisms, printing machines and looms, are driven by an electric motor in such a way that a trend in angular velocity which is dependent upon the angle of rotation, in particular also a constant angular velocity of the main driving shaft (2) of the driven machine, may be predetermined. To do this the angle of rotation (3) as well as the torque (4) are picked up off the main shaft (2) and fed to an adaptive control system (S) which, starting from the desired values (s0) of the angular velocity as a function of the angle of rotation, applies a corresponding correcting variable (Y) to the electric motor (1) and iteratively adapts it periodically in order to bring the trend in angular velocity of the main shaft (2) into agreement with the desired value (s0).

Abstract: A multiple way valve has a main valve chamber and a control valve chamber. Within the main valve chamber is an axially movable valve body. The control valve chamber includes a mechanically operable control valve body. A pressure line opens from a pressure medium source into the main valve chamber and also a working line which is closed with respect to the pressure line in extreme position of the main valve body and connected to it in the other extreme position. A partition separates the control valve chamber from the main valve chamber, the partition being movable in an axial direction. One end face of the main valve body facing away from the partition is connected to the pressure line in all positions of the main valve body and the second end of the main valve body is firmly attached to the partition. There is a connecting line which is open at all times with respect to the first end face of the main valve body and opens into the control valve chamber.