Abstract: A cooling system (1) of a light-emitting diode-based light (2) is proposed, wherein said light comprises a completely closed light fitting (3) with a flame-proof housing (4). In the housing, a cooling body (5) as part of the cooling system (1) is arranged. The cooling system (1) further comprises an electrically operated air circulation means (6). By such a cooling system, it is possible to compensate reduction in light flux with minimal additional costs or minimal additional weight or size of the light, wherein the LED light is simultaneously usable in hazardous areas in a wide temperature range.

Abstract: An explosion-proof LED module has at least one light-emitting diode, a heat sink connected to this and an LED cover that covers the LED at least in the emission direction. The LED cover extends into an insertion recess of the heat sink. In this insertion recess, the LED cover is surrounded by a casting compound resulting in sealing of the LED relative to an outer and possibly explosive atmosphere. As a result, an explosion-proof LED module can be provided whereby the manufacture of said explosion-proof LED module is relatively simple and possible in an economic manner in a short time from prefabricated parts. At the same time, the explosion-proof module is furthermore characterized in that sufficient cooling corresponding to the ignition protection type “intrinsic safety” and an embedding of the component according to ignition protection type “encapsulation” are given.

Abstract: A fitting for changing liquid paths, in particular for systems with a pressure exchanger, is provided. The pressure exchanger has pipes having alternating flow direction. The casing of the fitting includes an inlet piece, an outlet piece and a connection piece and at least one shut-off member connected to an actuator. The actuator is connected to a control device that controls the actuator to control a liquid flow between the inlet piece and the connection piece, or between the connection piece and the outlet piece. An actuator displaces a respective shut-off member arranged in each of the inlet piece and the outlet piece, with the shut-off members being axially displaceable to vary the size of flow openings that permit flow between the inlet piece and the connection piece or between the connection piece and the outlet piece.

Abstract: A forcing-off device of an, in particular, explosion-proof or flameproof container for electronic devices, the container including at least one base body having an opening surrounded by an opening edge and a cover part that can be placed onto or inserted into the opening edge. A forcing-off shoulder is formed on the base body or cover part at least in a section in circumferential direction of the container. The forcing-off shoulder is part of a shoulder running around the opening edge, and at least one forcing-off part is rotatably mounted in a lateral recess of the cover part or on the base body in an eccentric fashion between a forcing-off position and a passive position. The forcing-off part is an eccentric disc and in the forcing-off position is in abutment with the forcing-off shoulder for the gap-forming spacing of cover part and base body.

Abstract: A method for delivering a fluid using a centrifugal pump (11). Machines (1, 6) and/or apparatus (3, 8), which influence the pressure and/or the temperature of the fluid, are disposed upstream of the centrifugal pump (11). At the inlet to the centrifugal pump (11), the fluid is regulated to achieve a specific entry state. According to the invention, the entry state of the fluid is regulated by using the machines (1, 6) or apparatus (3, 8) such that, in the centrifugal pump (11), the fluid only takes on states in which the compressibility factor of the fluid has already reached or exceeded the minimum thereof.

Abstract: A rock drilling tool includes a drilling head provided with a cutting body and a helix arranged between the drilling head and a shaft. The cutting body extends continuously over a nominal diameter of the rock drilling tool and has an inner region configured as a centering tip and an outer region bordering the centering tip in the radial direction. The outer region is offset towards the rear in relation to the centering tip in the active direction of the rock drilling tool. The centering tip is configured as a pyramid or a truncated pyramid and has pyramidal edges with lateral surfaces located therebetween. At least one lateral surface of the centering tip is configured as a cavity.

Abstract: A light includes a housing part and a translucent cover connected to the housing part, in a pressure-tight manner, by a screw-on ring. A flame-extinguishing gap is formed between the housing part and the cover. The flame-extinguishing gap is formed directly between a surface of the cover, and a surface of the housing part, and the screw-on ring covers the flame-extinguishing gap at the gap end pointing to the outer side of the light.

Abstract: An explosion-proof housing includes at least one lower housing part which is provided with a housing wall defining a housing opening that can be closed by an articulated cover. The articulated cover is mounted by an articulation device to be pivotable between an opened and a closed position. In order to allow both a closely adjacent arrangement of housings and the complete utilization of the housing interior, the articulation device includes a lower articulation part arranged in the housing wall, and an upper articulation part arranged on a lower side of the articulated cover which faces the housing opening in a closed position. The lower articulation part and the upper articulation part are pivotably interconnected.

Abstract: The invention relates to a lighting fixture (1) which comprises at least one lighting fixture housing (2) and a cover (3) and which is constructed particularly as a safety and/or emergency exit light and/or as an explosion-proof light. A light is held by a clamp connection (5) at the lighting fixture housing, and at least one auxiliary electrical device (6) into the light is disposed at the lighting fixture housing. The lighting fixture can be expanded with a lower expense for the installation and with all explosion-protection measures observed, by virtue of the lighting fixture housing (2) having conductor rails (7) for supplying electricity to the light and to the auxiliary electrical device, where the auxiliary electrical device is constructed as a plug-in module which can be plugged onto the conductor rails.

Abstract: A method for delivering a fluid using a centrifugal pump (11). Machines (1, 6) and/or apparatus (3, 8), which influence the pressure and/or the temperature of the fluid, are disposed upstream of the centrifugal pump (11). At the inlet to the centrifugal pump (11), the fluid is regulated to achieve a specific entry state. According to the invention, the entry state of the fluid is regulated by using the machines (1, 6) or apparatus (3, 8) such that, in the centrifugal pump (11), the fluid only takes on states in which the compressibility factor of the fluid has already reached or exceeded the minimum thereof.

Abstract: A threaded cable gland includes a threaded sleeve, a stop ring arranged externally on the threaded sleeve, a retaining nut screwed onto the threaded sleeve, and a sealing element arranged within the threaded sleeve. A dwell pressure element is disposed between the retaining nut and the sealing element within the threaded sleeve, the dwell pressure element configured to act upon the sealing element.

Abstract: A plug-in housing module for forming an-explosion-proof switchgear/distribution panel including a number of plug-in points, where when the plug-in housing module is in a plugged-in position at a corresponding plug-in point of the number of plug-in points, the plug-in housing module is brought into contact with electrical connection devices and is detachably fixed to carrier rails of a frame of the switchgear/distribution panel, the plug-in housing module including at least one switching device for switching between a locking position and a release position, and when the at least one switching device is in the release position, the plug-in housing module can be moved out of the plugged-in position into a separation position, where in the separation position, the contact with the electrical connection devices is interrupted, while maintaining a flameproof mechanical connection.

Abstract: A monitoring device for monitoring at least one fluorescent lamp, particularly in areas at risk of explosion, which fluorescent lamp has a lamp tube with electrodes arranged on the ends thereof in the form of coils, and lamp sockets assigned to said electrodes, is improved for preventing large temperature increases in a corresponding fluorescent lamp, particularly in areas at risk of explosion, by complying with the appropriate explosion safety measure, in that the monitoring device has at least one temperature measuring device assigned to a coil, and one electro-mechanical interruption device with which the energy supply to the fluorescent lamp can be interrupted upon reaching a preset critical temperature value.

Abstract: The invention relates to a lighting fixture (1) which comprises at least one lighting fixture housing (2) and a cover (3) and which is constructed particularly as a safety and/or emergency exit light and/or as an explosion-proof light. A lighting means (4) is held by means of a clamp connection (5) at the lighting fixture housing, and at least one auxiliary electrical device (6) into the lighting means is disposed at the lighting fixture housing. In order to improve such a lighting fixture in such a way that the lighting fixture can be expanded easily and with a simplified construction in a cost-effective manner, with a lower expense for the installation and a lower expense of time, and with all explosion-protection measures observed, the lighting fixture housing (2) has conductor rails (7) for supplying electricity to the lighting means and to the auxiliary electrical device, wherein the auxiliary electrical device is constructed as a plug-in module which can be plugged onto the conductor rails.

Abstract: An explosion-proof connector (1) comprises a plug part (2) and a socket part (3), the plug part (2) comprising a plug housing (4) with at least two plug pins (6) arranged in a plug insert (5), and the socket part (3) comprising a socket housing (7) with matching socket contacts (9) arranged in a socket insert (8). In order to simplify such an explosion-proof connector in a way that it can be handled more easily especially when disconnecting plug part and socket part while maintaining explosion proofness, one housing (4, 7) comprises an outer sleeve (10) which is detachably connectable to the other housing (7, 4), a first gap (11) being formed between outer sleeve (10) and other housing (7, 4) and a second gap (12) between outer sleeve (10) and associated insert (4, 8) already before electrically contacting plug pins (6) and socket contacts (9) for realizing type of protection d, flameproof enclosure, and type of protection e, increased safety, respectively.

Abstract: The invention relates to a housing (1) for an electrical operating means such as a light, plug-in device, measuring instrument, switch, distributor, or the like, having at least one first and one second housing part (2,3) that can be assembled with one another in an explosion-proof fashion. Each housing part has one joining surface (4,5); when the housing parts are assembled, said joining surfaces are in contact with one another, forming a penetration-proof gap (6). In order to provide a novel structure of joining surfaces by means of which a corresponding penetration-proof gap is formed independently of the cross-sectional shape of the housing parts and to be able to substantially unite the advantages of both joining surfaces and the housing mentioned above, the joining surfaces run substantially perpendicular relative to the rest of the housing parts and surface profiles (7, 8) are formed in said joining surfaces, the penetration-proof gap being formed between said surface profiles.

Abstract: A light includes a housing part and a translucent cover connected to the housing part, in a pressure-tight manner, by a screw-on ring. A flame-extinguishing gap is formed between the housing part and the cover. The flame-extinguishing gap is formed directly between a surface of the cover, and a surface of the housing part, and the screw-on ring covers the flame-extinguishing gap at the gap end pointing to the outer side of the light.

Abstract: The invention relates to a threaded cable gland comprising a threaded sleeve, a stop ring arranged externally on the threaded sleeve, a retaining nut which is screwed onto the threaded sleeve and a sealing element arranged within the threaded sleeve. In order to improve the threaded cable gland such that modifications of the gap widths and thus the flame protection are avoided by means of a simple construction, a dwell pressure element is disposed between the retaining nut and the sealing element within the threaded sleeve for acting upon the sealing element.

Abstract: A plug-in housing module for forming an especially explosion-proof switchgear/distribution panel with a number of plug-in points contacts electrical connection devices when occupying its plugged-in position, and is detachably fixed to carrier rails or the like of a frame of the switchgear/distribution panel in the plugged-in position. The aim of the invention is to improve such a plug-in housing module in such a way that, without switching the entire panel off circuit, a plug-in housing module can be easily inserted into a corresponding plug-in point or removed therefrom even by an untrained person.

Abstract: A housing (1), especially an explosion-proof housing, comprises at least one lower housing part (3) which is provided with a housing wall and has a housing opening (5) that can be closed by an articulated cover (4), wherein the articulated cover (4) is mounted by means of an articulation device (6) to be pivotable between an opened and a closed position (7, 8). In order to improve such a housing to allow both a closely adjacent arrangement of housings and the complete utilization of the housing interior, the articulation device (6) comprises a lower articulation part (9) arranged in the housing wall (2), and an upper articulation part (11) arranged on a lower side (10) of the articulated cover (4) which faces the housing opening (5) in a closed position (8), which are pivotably interconnected.