Abstract: An improved mounting system for attaching a temperature switch to a fan structure is disclosed having a housing which may be directly attached to the protective grille of the fan. The housing may be detachably mounted on the fan structure such that it locates a temperature sensor of the temperature switch in the airstream generated by the fan. The temperature switch is connected to a control system which controls the fan in conjunction with the temperature of the airstream.

Abstract: The invention relates to an air conditioner for cooling electrical parts which are situated in a cabinet. A coolant circulation consisting of evaporator, condenser and compressor is provided. The air heated by the electrical parts is blown past the evaporator inside a housing and is returned into the cabinet to be cooled. A condenser is provided for heat dissipation. The housing of the air conditioner is subdivided into a first area and into a second area by a wall, whereby the wall seals the respective air streams from one another. All components sensitive to dirt, dust, etc. are accommodated in the first area, whereas the condenser and an aerator are situated in the second area.

Abstract: A focal-plane leaf shutter for photographic cameras, comprises an opening group of leaves and a closing group of leaves, each group having a main leaf which forms a parallelogram linkage with a pair of carrier levers, and secondary leaves. The main leaves serve to define an exposure aperture. The carrier levers are mounted by means of stationary pivot journals on a plate at one short side of the exposure aperture and the main leaves are pivotally connected by means of bearing journals to the free ends of the carrier levers. The secondary leaves are connected with the carrier levers at intervals between the pivot journals and the bearing journals. The two innermost carrier levers forming parallelogram linkages with the main leaves are mounted on a common pivot journal.

Abstract: A heat exchanger including a heat-dissipating element, a heat-receiving element and a circulating means for circulating a liquid in a closed cycle between the heat-dissipating element and the heat-receiving element. The circulating means includes an air/liquid siphon consisting of one of the elements, an air moving pump and an air supply means connecting the siphon to the pump. The heat-receiving element is located in a sealed air-exchange relationship with a cabinet.

Abstract: A heat exchanger including a heat-dissipating element, a heat-receiving element and a circulating means for circulating a liquid in a closed cycle between the heat-dissipating element and the heat-receiving element. The circulating means includes an air/liquid siphon consisting of one of the elements, an air moving pump and an air supply means connecting the siphon to the pump.

Abstract: A photographic camera having a mirror gearing and an electric motor for shutter cocking and film winding, in which the current connection for the electric motor situated in the camera housing is controlled alternately by the shutter and film winding.The camera includes a manual release mechanism and a remote release mechanism. A detent disc is mounted on a shaft and driven by the electric motor. A release lever is also mounted on the shaft. A first blocking lever is provided for inhibiting the movement of the release lever and is connectable both with the manual release and the remote release. A second blocking lever also inhibits the movement of the release lever. A detent lever with a nose thereon engages the detent disc and is connected through a joint with the second blocking lever. An actuator lever is provided for releasing the detent lever from the detent disc and is blockable by a blocking pawl coupled with the mirror gearing. A dog is driven by the motor for tensioning the actuator lever.