Abstract: An electrical switching device includes a plurality of electrical loads, an electrical energy source for supplying electrical energy to the plurality of electrical loads, a bus line for conducting the electrical energy from the electrical energy source to the plurality of electrical loads. The plurality of electrical loads are connected to the bus line and a group of a plurality of electronic fuses are electrically arranged between the electrical energy source and the plurality of electrical loads. The plurality of electronic fuses are separate from each other and are distributed in the electrical switching device. The electrical switching device also includes a control unit arranged in the bus line. The control unit is configured in such a way that the control unit can be used to address the plurality of electronic fuses in the group via the bus line.

Abstract: An electric refrigeration compressor, in particular for household refrigerating and deep-freezing appliances, including an outer casing, an inner body, a pressure chamber integrated in said inner body as well as a lid by which the opening of the pressure chamber is closeable, wherein the lid and the pressure chamber are provided with an annular flat rim (5) arranged in the region of the opening of the pressure chamber as well as a corresponding annular flat rim (6) extending about the closing periphery of the lid, wherein the annular flat rims are mutually couplable so as to be connectable in a stable and permanent manner. One of the annular flat rims is provided with a rib projecting against the corresponding annular rim located opposite and has a substantially triangular radial vertical section with an outwardly oriented corner, the angle of such a corner ranging between 70° and 90°. The bottom (E) of said pressure chamber is flat.

Abstract: Electric compressor comprising a piston provided with a respective head and a valve plate mounted between the head and the body of the cylinder and provided with a gas suction port, the head being provided with a protrusion adapted to be intermittently introduced in the suction port substantially in the top dead-center position of the piston. The piston is provided externally, in the portion thereof which is opposite to the head side, with a recess that is accessible from the outside and is orientated towards the inner volume of the piston, the recess penetrating the body of the piston down to a depth which is at least equal to the height of the protrusion above the plane of the head.

Abstract: A photographic camera has an interchangeable lens movable from a first or fully seated position on the camera body to a second disengaged position whereupon it may be removed from the camera body. An electric warning signal device has a circuit containing a switch responsive to the position of the interchangeable lens in such a way that the switch is closed to activate the warning signal as soon as the interchangeable lens begins to move away from its fully seated position. In a further development of the invention there is also a second switch in series with the first switch, and this second switch is kept closed so long as the interchangeable lens is in its first position or is in an intermediate position between its first and second positions, and this second switch is opened when the interchangeable lens reaches its second position disengaged from the camera body and ready to be removed therefrom.

Abstract: A photographic camera with an interchangeable lens and an electrically driven function actuator for actuating some function of the camera such as the operation of the shutter. The circuit of the function actuator includes a switch responsive to the position of the interchangeable lens, so that the function actuator cannot be operated unless the interchangeable lens is fully seated or engaged in proper operating position.

Abstract: A sound recording and reproducing apparatus utilizing replaceable magnetic tape cassettes. The sound recording and reproducing apparatus includes an arrangement for the detection of a specified position of the tape utilizing a light detection unit which is installed in the apparatus. The light detection unit consists of a light emitting device together with a light receiving device. The casing of the cassette includes a reflective portion thereon which is placed in reflective alignment between the light emitting device and the light receiving device. Light can only be transmitted between the light emitting device and the light receiving device once a specified position of the tape is achieved.