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 electric plug connector is intended to be used especially for explosion-proof areas. It comprises a plug and a socket. The latter includes in a housing a socket insert which, in the inserted condition of the plugs, is supported such that it is rotatable between an off position and an on position. In said socket a locking means is supported such that it is adjustable between a locking position and a release position, said locking means being provided with at least one coding projection which, in the condition in which the plug is inserted in the socket, projects into a complementary coding aperture and releases the locking means, whereupon the socket can be switched from said off position to said on position.

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: An electrical socket, in particular for explosion-prone areas, includes a socket insert, which is supported in a socket housing such that it is adapted to be rotated between off- and on-positions and in which a substantially pin-shaped locking element is supported such that it is displaceable between a pressed-down blocking position and a release position in which it projects beyond the socket insert. In the release position of the locking element, the socket insert is rotatable between the off- and on-positions. In order to improve an electrical socket of this type in such a way that it can also be connected to other plugs on certain occasions, the substantially pin-shaped locking element is defined by at least one removable locking component and a blocking component, which are arranged on top of one another in the socket insert, with the locking component projecting beyond the socket insert in the release position.

Abstract: An electrical socket, in particular for explosion-prone areas, includes a socket insert, which is supported in a socket housing such that it is adapted to be rotated between off- and on-positions and in which a substantially pin-shaped locking element is supported such that it is displaceable between a pressed-down blocking position and a release position in which it projects beyond the socket insert. In the release position of the locking element, the socket insert is rotatable between the off- and on-positions. In order to improve an electrical socket of this type in such a way that it can also be connected to other plugs on certain occasions, the substantially pin-shaped locking element is defined by at least one removable locking component and a blocking component, which are arranged on top of one another in the socket insert, with the locking component projecting beyond the socket insert in the release position.

Abstract: A rock drill including a helical shank and a drill head. The drill head has an end face pointing in a feed direction and at least one roof-shaped carbide cutting element on the end face of the rock drill. The carbide cutting element extends transversely across the drill head and has cutting edges. The end face of the carbide cutting element has an additional chip space at least in front of the carbide cutting element and includes an encircling step to create the additional chip space in the feed direction.

Abstract: A convertible motor vehicle roof with a roof part (12), with a rear part (14) which adjoins the roof part, and with side roof members (10) which are pivotally coupled on both sides to the roof part (12). To open the motor vehicle roof, the rear part (14) together with the roof part (12) and the side roof members (10) can be lowered into a stowage space (22) located in the rear and the side roof members (10) can be swung to the outside before or during lowering into the storage space (22), the swivel bearing means (28) which supports the respective side roof member (10) on the roof part (12) having at least two connecting rods or a connecting rod and a crank guide and being formed especially as a planar four-joint linkage.

Abstract: The invention relates to a method for coloring plastics. To this end, used plastics are firstly collected before being subsequently sorted. The collected and sorted plastics are ground, and coloring pigments existing in the ground plastics are determined. The target color of the plastic that is to be newly produced is predetermined, and the used ground plastics are mixed in quantities that provide the new plastic with the desired target color.

Abstract: An electrical socket, in particular for explosion-proof areas, comprising a socket insert, which is supported in a socket housing such that it is adapted to be rotated between off- and on-positions and in which a substantially pin-shaped locking means is supported such that it is displaceable between a pressed-down blocking position and a release position in which it projects beyond the socket insert. In the release position of the locking means, said socket insert is rotatable between said off- and on-positions.

Abstract: A device for transmitting signals between an automation system and field device comprises a supporting plate and modules which are attachable to said supporting plate. The modules are provided with terminals especially for field devices. The supporting plate has arranged thereon data lines of a local bus and voltage-supply lines. The modules have at least local bus interfaces. The device additionally comprises at least one bus coupling module which is attachable to the supporting plate and which is provided with a local bus interface and a field bus interface for communication with said modules and said automation system.

Abstract: A convertible roof (2) of a convertible motor vehicle with at least one front roof part which is movably supported on the body by a bearing (8), and a rear roof part (13) which can be moved over the front roof part (5) and can be lowered with it into a rear stowage space (3). An especially simple structure can be achieved when the rear roof part (13) on the front side can be moved over the front roof part (5) by a raising mechanism (27) which is movably supported on a lengthwise guide (32) which is located on the front roof part (5). A carriage (31) can be guided on the lengthwise guide (32) of the front roof part (5) and the raising lever (28) of the raising mechanism, which lever is pivotally connected to the rear roof part (13), is supported on the carriage to be able to pivot and to be moved by the raising mechanism.

Abstract: A wind deflector (5) for a motor vehicle with roof or a convertible top which can be transferred to a stowage space. The wind deflector (5) is pivotally supported on a cross beam (4) which extends over the front windshield (3), and it can be pivoted by a drive (13) which also actuates a detachable interlock of the convertible top (2) on the cross beam (4), depending on the position of the raising mechanism (18) which is actuated by the drive means (13) for the wind deflector (5), a locking device (11) is coupled to the drive (13) or is uncoupled from it.

Abstract: A rock drill having a helical shank (3) and a drill head (2) is proposed, this rock drill having a main cutting tip (6), inclined in a roof shape, and secondary cutting tips (14, 15) arranged in a cross shape thereto. In order to produce an enlarged chip space for the secondary cutting tips (14, 15), the end face (20) of the drill head (2) is designed in a step shape, so that a shoulder (25) is obtained for forming an additional chip volume (27).

Abstract: An open or covered inlet structure having pumps arranged therein. To be able to reduce excavation and concreting works, the foundations of the inlet structure are positioned at a substantially higher level. Only at the point at which the pumps (2) and their inlet nozzles are mounted does the foundation plate have one or more recesses or depressions (7) into which the first impellers (2.1) of the pumps (2) are lowered.

Abstract: A convertible motor vehicle roof with a roof part (12), with a rear part (14) which adjoins the roof part, and with side roof members (10) which are pivotally coupled on both sides to the roof part (12). To open the motor vehicle roof, the rear part (14) together with the roof part (12) and the side roof members (10) can be lowered into a stowage space (22) located in the rear and the side roof members (10) can be swung to the outside before or during lowering into the storage space (22), the swivel bearing means (28) which supports the respective side roof member (10) on the roof part (12) having at least two connecting rods or a connecting rod and a crank guide and being formed especially as a planar four-joint linkage.

Abstract: A convertible roof (2) of a convertible motor vehicle with at least one front roof part which is movably supported on the body by a bearing (8), and a rear roof part (13) which can be moved over the front roof part (5) and can be lowered with it into a rear stowage space (3). An especially simple structure can be achieved when the rear roof part (13) on the front side can be moved over the front roof part (5) by a raising mechanism (27) which is movably supported on a lengthwise guide (32) which is located on the front roof part (5). A carriage (31) can be guided on the lengthwise guide (32) of the front roof part (5) and the raising lever (28) of the raising mechanism, which lever is pivotally connected to the rear roof part (13), is supported on the carriage to be able to pivot and to be moved by the raising mechanism.

Abstract: A wind deflector (5) for a motor vehicle with roof or a convertible top which can be transferred to a stowage space. The wind deflector (5) is pivotally supported on a cross beam (4) which extends over the front windshield (3), and it can be pivoted by a drive (13) which also actuates a detachable interlock of the convertible top (2) on the cross beam (4), depending on the position of the raising mechanism (18) which is actuated by the drive means (13) for the wind deflector (5), a locking device (11) is coupled to the drive (13) or is uncoupled from it.

Abstract: A seal which is arranged between a shaft and a casing opening and separates, from one another, two spaces at different pressures, with the exception of a residual annular gap which permits a slight leakage caused by a gap flow. The seal can replace prior seal types and only permits a very small leakage volume flow while being relatively uncomplicated in terms of components, assembly and maintenance. The seal includes a bush (13) tightly surrounding the shaft (2), having at least one grooves (14) in each of which is arranged, with slight axial clearance, an elastic annular element (15, 18, 20, 21, 23) split by a longitudinally extending gap (16, 17, 19). The pressure difference between axial end surfaces of the annular element(s) (15, 18, 20, 21, 23) urges the annular element(s) (15, 18, 20, 21, 23) into sealing contact with the casing opening (3) in such a way that the gap flow is guided via the annular gap between the groove(s) (14) and the annular element(s) (15, 18, 20, 21, 23).

Abstract: A plug includes at least one plug body having an axial bore, with a cable being insertable into the plug body at the one end of the plug body, and which can be connected to electric contact elements arranged at the second end. The first end has an associated strain relief mechanism including at least two clamping elements adjustably supported for clamping the cable. The plug body also has at least two sliding guides open to the outside in the direction toward the axial bore, in which the clamping elements are movably guided.

Abstract: A device for transmitting signals between an automation system and field devices comprises a supporting plate and modules which are attachable to said supporting plate. The modules are provided with terminals especially for field devices. The supporting plate has arranged thereon data lines of a local bus and voltage-supply lines. The modules have at least local bus interfaces. The device additionally comprises at least one bus coupling module which is attachable to the supporting plate and which is provided with a local bus interface and a field bus interface for communication with said modules and said automation system.