Abstract: An LED module combines a heat sink portion and an LED arrangement. The heat sink portion is a first part of a multiple part heat sink having at least this first part and a second part. The heat sink portion is not sufficient alone to provide the required cooling for the operation of the LED arrangement so it can be small and low cost. A user can simply replace the LED module as a single unit, without the significant waste and cost of disposing of the full heat sink.

Abstract: An LED module combines a heat sink portion and an LED arrangement. The heat sink portion is a first part of a multiple part heat sink having at least this first part and a second part. The heat sink portion is not sufficient alone to provide the required cooling for the operation of the LED arrangement so it can be small and low cost. A user can simply replace the LED module as a single unit, without the significant waste and cost of disposing of the full heat sink.

Abstract: A lamp 10 is described comprising a burner 14 fixed to a lamp base 12. An operating circuit 50 is arranged within the lamp base 12 for supplying electrical power to the burner 14. The operating circuit 50 is electrically connected to at least one elongate contact path element 70 extending within the base. The contact path element 70 is supported within the base 12 and comprises a first portion 70a fixed within the base and a second portion 70b slidably received within the base 12. The contact path element 70 is fixed to the operating circuit 50 at a position arranged in longitudinal direction from the second portion 70b. This allows a manufacturing method, where the contact path element is fixed to the operating circuit 50 at a position arranged in longitudinal direction from the second portion, so that a longitudinal movement of the second portion is possible to compensate for manufacturing tolerances.

Abstract: A lamp (10) is described comprising a burner (14) fixed to a lamp base (12). The lamp base (12) includes a top wall oriented towards the burner (14). Within the top wall, an opening (28) is provided. The lamp base (12) further comprises an insulation chamber (42) where an electrical component, e. g. a transformer (54), is embedded within an insulation compound (43). In order to prevent possibly spilled insulation compound from leaking through the opening (28), a raised retention wall (46) is provided around the opening.

Abstract: A high-pressure gas discharge lamp unit 10 is described including a burner 14 with a discharge vessel 18. The burner 14 comprises electrical contact leads 22,24 and protrudes from and is fixed to a lamp cap housing 12, so that at least a first of the contact leads 22, 24 extends into the housing 12. A lamp operating circuit 50 is arranged within the housing 12, electrically connected to the electrical contact leads 22, 24. In order to allow a particularly compact lamp unit, the housing comprises a bottom plate 44 made out of a metal material to dissipate heat, which comprises an opening 68 into which a cap element 60 made out of an electrically insulating material is inserted to enclose a first electrical contact lead 22.

Abstract: A lamp (10) is described comprising a burner (14) fixed to a lamp base (12). The lamp base (12) comprises a metal housing part (40). The metal housing part (40) comprises a contact sheet element (82) made out of a different metal material. Electrical contacts are provided within the base (12), including an electrical ground contact (70). A contact spring (76) is provided for contacting the electrical ground contact (70) to the metal housing part (40). The contact spring (76) is arranged to press against the contact sheet element (82) to provide electrical ground connection to the metal housing part (40).

Abstract: A lamp (10) is described comprising a burner (14) fixed to a lamp base (12). The lamp base (12) includes a top wall oriented towards the burner (14). Within the top wall, an opening (28) is provided. The lamp base (12) further comprises an insulation chamber (42) where an electrical component, e. g. a transformer (54), is embedded within an insulation compound (43). In order to prevent possibly spilled insulation compound from leaking through the opening (28), a raised retention wall (46) is provided around the opening.

Abstract: A lamp (10) is described comprising a burner (14) fixed to a lamp base (12). The lamp base (12) comprises a metal housing part (40). The metal housing part (40) comprises a contact sheet element (82) made out of a different metal material. Electrical contacts are provided within the base (12), including an electrical ground contact (70). A contact spring (76) is provided for contacting the electrical ground contact (70) to the metal housing part (40). The contact spring (76) is arranged to press against the contact sheet element (82) to provide electrical ground connection to the metal housing part (40).

Abstract: A high-pressure gas discharge lamp unit 10 is described including a burner 14 with a discharge vessel 18. The burner 14 comprises electrical contact leads 22,24 and protrudes from and is fixed to a lamp cap housing 12, so that at least a first of the contact leads 22, 24 extends into the housing 12. A lamp operating circuit 50 is arranged within the housing 12, electrically connected to the electrical contact leads 22, 24. In order to allow a particularly compact lamp unit, the housing comprises a bottom plate 44 made out of a metal material to dissipate heat, which comprises an opening 68 into which a cap element 60 made out of an electrically insulating material is inserted to enclose a first electrical contact lead 22.

Abstract: A lamp 10 is described comprising a burner 14 fixed to a lamp base 12. An operating circuit 50 is arranged within the lamp base 12 for supplying electrical power to the burner 14. The operating circuit 50 is electrically connected to at least one elongate contact path element 70 extending within the base. The contact path element 70 is supported within the base 12 and comprises a first portion 70a fixed within the base and a second portion 70b slidably received within the base 12. The contact path element 70 is fixed to the operating circuit 50 at a position arranged in longitudinal direction from the second portion 70b. This allows a manufacturing method, where the contact path element is fixed to the operating circuit 50 at a position arranged in longitudinal direction from the second portion, so that a longitudinal movement of the second portion is possible to compensate for manufacturing tolerances.

Abstract: An apparatus for fastening a burner of a discharge lamp to a housing or plug portion including a sleeve clamped around an outer bulb of the burner, an annular base fastened to the housing or plug portion of the electronic ballast unit having tabs that are orientated in the direction of the center point of the annular base and are biased against the sleeve. The tabs are inclined at an angle through an opening of the base, so that in the mounted condition of the burner, they rest against the sleeve below a surface of the annular base.

Abstract: An extraction device, particularly for mining, having two drive stations and a drive chain which extends between the sprockets thereof. So that hanging chain or chain wear to a conveyor chain, in the case of a conveyor device, or to a plow chain, in the case of a plow device, can be detected, magnetic sensor units for detecting at least one chain condition of the drive chain are provided, wherein each sensor unit includes a transmitter, which is formed by a static or dynamic magnetic field generator, and a detector field, which is provided with a plurality of magnetic field detectors, as a detector, the detector and the transmitter being arranged to the side of a passage for the run of the drive chain that is to be scanned. The invention also relates to a method for controlling an extraction device for preventing hanging chain.

Abstract: The invention describes a socket (1A, 1B) for a lamp (2), which socket (1A, 1B) comprises a socket wall (11) enclosing a cavity (12) between a socket rim (13) and a socket floor (14), which cavity (12) is dimensioned to partially accommodate the lamp (2); and at least one tab (3) for supporting the lamp (2) in the socket (1A, 1B), which tab (3) is arranged in the cavity (12) such that the tab (3) is secured in the body of the socket (1A, 1B) below the level of the socket rim (14); the tab (3) extends into the cavity (12) towards the socket rim (13); and an upper end of the tab (2) is arranged essentially at the level of the socket rim (13) or below the level of the socket rim (13).

Abstract: A link chain or a chain link for scraper chain conveyors with vertical and horizontal chain links which are interlinked in an articulated manner for scraper chain conveyors for use in mining. In particular to horizontal chain links with front sections with a straight face zone and with longitudinal limbs, which connect the front sections around an oval inner opening and which are provided on their outer surfaces with a recess, wherein the rear sides of front sections delimiting the inner opening form a contact zone for circular arcs of vertical chain links. In order to improve the service life of the link chain, the rear sides, which face oval inner opening, of front sections are provided with a surface which has a hollow, which forms a central region of the contact zone, between a fillet cambered in a crowned manner.

Abstract: Chain return arrangement and sprocket and chain assembly employed therein with the bow flanks of the horizontal chain links (1) of the chain assembly (10) exhibiting a concave trough at least below an equatorial line (7) and the chain link pockets (52) of the sprocket (50) that receive the horizontal chain links at their tooth flanks (53) in the contact areas (55) to the chain links (1) having a convex crown shape to match the troughed bow flank. This significantly reduces the surface pressures between the two parts.

Abstract: It is provided a socket (16) for an automotive lamp (10), particularly HID lamp, for use in an automotive headlight (12), comprising a bottom housing part (24) comprising a bottom surface (30) defining a proximal end of the socket (16), a top housing part (26) directly connected to the bottom housing part (24), wherein the top housing part (26) comprises a top surface (32) pointing away from the bottom housing part (24), and reference protrusions (36) for aligning a burner (14) with respect to the reference protrusions (36) during connecting the burner (14) to the socket (16), wherein the reference protrusions (36) protrudes from the level (34) of the top surface (32) or starting from below the level (34) of the top surface (32). Since a metal reference ring protruding from the socket (16) can be saved the height of the socket (16) can be reduced leading to a reduced total height of an automotive lamp (10) comprising this socket (16).

Abstract: The invention relates to a method and apparatus for fastening the burner of a discharge lamp to a housing or plug portion, comprising a sleeve to be clamped around the outer bulb of the burner and an annular base which can be fastened to the housing or plug portion of the electronic ballast unit and which has at least three tabs that are orientated in the direction of the center point of the annular base and may be biased against the sleeve. Furthermore the invention relates to a discharge lamp including a burner, the outer bulb of which is provided with a sleeve, via which the outer bulb is fastened to a housing or plug portion of an electronic ballast unit by means of an annular base, with tabs integrally moulded onto the base being spring-biased against the sleeve and being welded onto the same.

Abstract: Chain return arrangement and sprocket and chain assembly employed therein with the bow flanks of the horizontal chain links (1) of the chain assembly (10) exhibiting a concave trough at least below an equatorial line (7) and the chain link pockets (52) of the sprocket (50) that receive the horizontal chain links at their tooth flanks (53) in the contact areas (55) to the chain links (1) having a convex crown shape to match the troughed bow flank. This significantly reduces the surface pressures between the two parts. (See FIG.

Abstract: Chain return arrangement and sprocket and chain assembly employed therein with the bow flanks of the horizontal chain links (1) of the chain assembly (10) exhibiting a concave trough at least below an equatorial line (7) and the chain link pockets (52) of the sprocket (50) that receive the horizontal chain links at their tooth flanks (53) in the contact areas (55) to the chain links (1) having a convex crown shape to match the troughed bow flank. This significantly reduces the surface pressures between the two parts.

Abstract: The invention relates to a link chain for scraper chain conveyors with vertical chain links which are interlinked in an articulated manner and horizontal chain links, wherein vertical chain links have around the full circumference a constant cross-sectional profile provided on the outside with a flat section and on the inside with a circular arc and horizontal chain links have front sections which have a straight front zone, wherein longitudinal limbs, which connect front sections, of horizontal chain links are provided on their outer faces with a recess.