Abstract: An explosion-proof enclosure includes a front cover (first housing half or portion) and a rear cover (second housing half or portion) joined together by a retention member inserted into a passageway at least partially formed by structures of both the front cover and the rear cover. The enclosure includes an internal chamber for containing an associated electronic device. The passageway generally extends peripherally about the internal chamber. In one exemplary embodiment, the retention member is a ball-chain and the passageway completely surrounds the internal chamber such that respective end portions of the ball-chain overlap. A sealing element is provided for sealing respective mating surfaces of the front cover and rear cover. In another example, the retention member is a rigid split retention member.

Abstract: An explosion-proof enclosure includes a front cover (first housing half or portion) and a rear cover (second housing half or portion) joined together by a retention member inserted into a passageway at least partially formed by structures of both the front cover and the rear cover. The enclosure includes an internal chamber for containing an associated electronic device. The passageway generally extends peripherally about the internal chamber. In one exemplary embodiment, the retention member is a ball-chain and the passageway completely surrounds the internal chamber such that respective end portions of the ball-chain overlap. A sealing element is provided for sealing respective mating surfaces of the front cover and rear cover. In another example, the retention member is a rigid split retention member.

Abstract: An explosion-proof enclosure includes a front cover (first housing half or portion) and a rear cover (second housing half or portion) joined together by a retention member inserted into a passageway at least partially formed by structures of both the front cover and the rear cover. The enclosure includes an internal chamber for containing an associated electronic device. The passageway generally extends peripherally about the internal chamber. In one exemplary embodiment, the retention member is a ball-chain and the passageway completely surrounds the internal chamber such that respective end portions of the ball-chain overlap. A sealing element is provided for sealing respective mating surfaces of the front cover and rear cover. In another example, the retention member is a rigid split retention member.

Abstract: An explosion-proof enclosure includes a front cover (first housing half or portion) and a rear cover (second housing half or portion) joined together by a retention member inserted into a passageway at least partially formed by structures of both the front cover and the rear cover. The enclosure includes an internal chamber for containing an associated electronic device. The passageway generally extends peripherally about the internal chamber. In one exemplary embodiment, the retention member is a ball-chain and the passageway completely surrounds the internal chamber such that respective end portions of the ball-chain overlap. A sealing element is provided for sealing respective mating surfaces of the front cover and rear cover. In another example, the retention member is a rigid split retention member.

Abstract: A housing for receiving an electronic device in an explosive atmosphere may include a first housing part and second housing part coupled to one another via at least one screw connection defining a housing interior for receiving the electronic device. The screw connection may include a screw and a separate threaded pin. A recess may be defined in first housing part. A first threaded bush may be arranged in the recess for receiving the screw. A through-opening may be defined in the second housing part concentric to the recess and a second threaded bush may be arranged in the through-opening for partially receiving the screw and the threaded pin. The screw may be arranged in the through-opening and screwed into the first threaded bush coupling the first housing part and the second housing part to one another. The threaded pin may be screwed into the second threaded bush.

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 assembly for accommodating an electrically operated device may include a housing made from a plastic, delimiting a housing interior space, and having a viewing window formed therein that may be closed by a window pane made of a transparent material. The device may include an electrically operated device arranged inside the housing interior space, on the outside of which at least one actuatable control element may be provided. An aperture may be formed in a housing wall in which an actuating element made from an elastic plastic may be arranged at least partially and may be operable by a user of the electrically operated device. The actuating element may be coupled mechanically to the control element such that the control element is operable from outside the housing. An inner housing part made from an elastic plastic may be arranged on an inner side of the housing wall.

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 may include a first supply line and a second supply line which are connectable with an electric energy supply unit at a first supply line input connection and a second supply line input connection. The first supply line and the second supply line may be electrically connectable at a first supply line output connection and a second supply line output connection with an external electronic device for supply of electric energy. The arrangement may include a switching element provided in the first supply line. The switching element may be switched between an opened state, in which the switching element electrically interrupts flow of an electrical current in the first supply line, and a closed state, in which the electrical current flows uninterrupted. The electronic circuit arrangement may include a first electronic circuit, a second electronic circuit, and a third electronic circuit.

Abstract: An electronic circuit arrangement may include a first and a second electrical supply line for connecting an electronic device with a rechargeable battery. The first electrical supply line may be connected at one end with the rechargeable electric battery and at the other end with the electronic device for supplying electric energy. At least two switching elements may be provided in the first electrical supply line, which each may be switchable between an open state, in which the respective switching element electrically interrupts the first supply line, and a closed state. The electronic circuit arrangement may include a protective circuit arrangement and a reset circuit arrangement.

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 may include a casing surrounding a casing interior. The casing may include a viewing window which is sealed by a transparent window pane. An electronic device may be disposed in the casing interior and have a display. The display may be secured in a fixed position on the window pane. A suspension/damping device may support at least one of the window pane and the electronic device on the casing.

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.

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.