Abstract: Equipment for supplying energy to buildings or building complexes using solar energy as a source has a first solar panel installation for converting solar energy to electricity, a second solar panel installation for converting solar energy to thermal energy, a water based electrolysis device for splitting water into hydrogen and oxygen using electricity generated by the first solar panel installation, a storage device for hydrogen and an electricity storage device. In order to create a less costly and more versatile energy supply system, the arrangement of multiple independently functioning modular fuel cell blocks of different capacities composed of at least one fuel cell block of specified capacities which can be controlled and initiated either individually or in combination depending on the demand for electricity and/or thermal energy and depending on the optimal constellation of fuel cell blocks engaged.

Abstract: A coupling device for a torque transmitting, longitudinally displaceable coupling of two shaft parts formed by toothed profiles is arranged to ensure backlash free meshing of the toothed profiles in the direction of rotation. An intermediate bush is provided between both shaft parts, which intermediate bush meshes with their toothed profiles and is slit like a collet at both bush end areas. A clamping and expanding members are respectively allocated on the shaft side to the slit bush end areas, which clamping and expanding members come into mesh with the shaft parts during coupling of the latter and, under the action of an axially directed contact force, avoid, by compression and expansion respectively of the slit bush end areas, flank clearance between the toothed profiles coming into mesh with one another.

Abstract: A coupling arrangement for two axially aligned shaft sections is obtained through two splined profiles, one attached to each shaft through a tensioning arrangement that eliminates relative rotation between the two shaft sections while permitting longitudinal movement therebetween. One shaft section connected to one end of the tensioning device and the other shaft section connected to another end of the tensioning device and wherein the other end of the tensioning device operates to cause one of the splined profiles which is slotted to grasp the other splined section to provide for the relative non-rotational drive and the axial longitudinal shifting of the shaft sections.