Abstract: A housing for receiving an electrically operated apparatus may include an inner housing part at least partially defining a housing interior. The inner housing part may include an inner passage opening. The housing may also include an outer housing part disposed on a side of the inner housing part facing away from the housing interior. The outer housing part may include an outer passage opening. The outer passage opening and the inner passage opening may at least partially define an acoustic duct for discharging airborne noise from the housing interior. The acoustic duct may be closed by a fluid-tight and airborne noise-permeable membrane. Further, the housing may include a porous member disposed within the acoustic duct configured to prevent an ignition breakthrough from the housing interior into an external environment outside of the outer housing part.

Abstract: A loudspeaker arrangement may include a loudspeaker having first and second voice coils to provide motive force for a loudspeaker membrane, and an electric transformer having a primary coil connectable electrically to an electrical power unit, and a secondary coil connectable electrically to the first and second voice coils. The voice coils each may have two first winding ends connected to each other via a first electrical conducting path to form a parallel electrical circuit and two second winding ends connected to each other via a second electrical conducting path. The first electrical conducting path may be connected electrically to a first winding end of the secondary coil via a first electrical connecting path and via an additional first electrical connecting path, which may form a parallel circuit with the first electrical connecting path.

Abstract: A device arrangement may include an electronic device having a display. A cover may be secured on the display. The cover may include a first transparent cover element and a second transparent cover element. A transparent liquid may be disposed in a sandwich-like manner between the first cover element and the second cover element.

Abstract: An electronic circuit arrangement for use in an explosive area may include an electrical signal line, which connects an electrical input connector to an electrical output connector, and an electrical earth line, which can be or is electrically connected to the electrical signal line by at least one electrical earthing line. An inductive component and a semiconductor switch may be arranged in the at least one earthing line. The semiconductor switch may be switched between a closed state, in which the signal line is electrically connected via the at least one earthing line to the earth line, and an open state, in which this electrical connection is interrupted.

Abstract: A device arrangement may include an inner casing. The inner casing may include an inner casing base and an inner casing cover defining a cavity therebetween. The cavity may receive an electronic device. The inner casing base may have a first viewing window. A window pane may be composed of a transparent material and be attached to at least one of the electronic device and the inner casing. The window pane may at least partially seal the first viewing window. An outer casing may at least partially encase the inner casing. The inner casing may be mounted on the outer casing via a suspension/damping device.

Abstract: A device arrangement may include an electronic device at least partially enclosed in a device casing. A casing may at least partially delimit a casing interior. The device casing may be disposed in the casing interior. A pressure reduction device may be arranged in the device casing and be configured to reduce a gas pressure of an ignitable gas mixture disposed in at least one of the casing and the device casing. The pressure reduction device may include at least one damping element and a stabilizing device at least partially encasing the at least one damping element.

Abstract: A device arrangement for receiving an electronic device may include a casing enclosing at least partially a casing interior. A resilient partition wall may be disposed in the casing and divide the casing interior into a first sub-chamber and a second sub-chamber fluidically separated from the first sub-chamber. The first sub-chamber may be configured to receive the electronic device. The first sub-chamber may include a first gas at a pre-determined gas pressure and the second sub-chamber may include a second gas having a second gas pressure. A pressurizing device may be disposed in the casing interior and be configured to increase the pre-determined gas pressure of the first sub-chamber by a pre-determined amount in relation to the second gas pressure in the second sub-chamber. The second sub-chamber may communicate fluidically with a surrounding environment of the casing.

Abstract: The present invention relates to a portable electronic device with static charge protection, which is particularly suitable for use in areas exposed to explosion hazards and not limited in its functions therein. The portable electronic device comprises a transmission module having an antenna, and a housing, accommodating the transmission module and the antenna, wherein at least part of the housing has such a frame structure of frame elements of anti-static material with areas of another material placed there in-between that the radiation of the antenna goes essentially through the areas and not through the frame elements of anti-static material.