Abstract: A test device to localize a partial discharge in or at an electrical component may include at least one antenna to capture an electromagnetic wave caused by a partial discharge in the electrical component. The test device includes multiple microphones arranged in an environment around the electrical component. The microphones capture sound waves caused by the partial discharge. It is examined if an intensity of the electromagnetic wave exceeds a first limit value and/or the intensity of the sound wave captured by one of the multiple microphones exceeds a second limit value. Depending on the captured sound wave and/or the electromagnetic wave and on the examination relating to the first and/or second limit value, a location of the partial discharge can be determined.

Abstract: The present disclosure relates to an electric motor having a stator and a rotor. The rotor is fitted with permanent magnets which are surrounded by a rotor packet. A heat dissipating elementis attached to the rotor packet. A gap seal is formed between an outer diameter of the heat dissipating element and an inner diameter of a component connected to the stator. In some examples, the component may be a coil body connected to the stator.

Abstract: The invention relates to abasic body (1) for an electric motor (2), which comprises the following features: a substantially cylindrical outer wall (3), which forms a rotor space (4) for receiving a rotor (5) at least partially inside the outer wall (3) and on which a winding (6) can be mounted at least partially outside the latter; a laminated core (7) which is held by the outer wall (3); a receiving space (9) which serves to receive a printed circuit board (12) or another component of the electric motor (2) and which adjoins the rotor space (4); a partition wall (10) separating the receiving space (9) from the rotor space (4); at least one orienting device (13) for positionally orienting the printed circuit board (12) or the other component of the electric motor (2) inside the receiving space (9); a receptacle (17) for a cover (18) which closes the rotor space (4), said receptacle being situated on the outer wall (3) on the side of the rotor space (44) opposite to the partition wall (10); and an inner wall (

Abstract: A connection assembly for a backrest, of an office or conference chair, includes a backrest structural element, a transverse support element, a transverse bearing by means of which the backrest structural element is rotatably coupled to the transverse support element in a direction perpendicular to a transverse direction, and a connection portion connecting the transverse support element to the backrest structural element, arranged and formed so that the backrest structural element is resiliently movable relative to the transverse support element.

Abstract: A connection assembly for a backrest, of an office or conference chair, includes a backrest structural element, a transverse support element, a transverse bearing by means of which the backrest structural element is rotatably coupled to the transverse support element in a direction perpendicular to a transverse direction, and a connection portion connecting the transverse support element to the backrest structural element, arranged and formed so that the backrest structural element is resiliently movable relative to the transverse support element.

Abstract: A roll crusher has at least two crushing rolls and at least two drive trains for the driving of the crushing rolls. The drive trains have each at least one gear for the reduction of the motor speed and a corresponding increase of the torque. The synchronization takes place on a faster-running side of the gear, i.e., the side with lower torque, such that advantageously markedly lower torques are transmitted. The synchronization may be markedly more compact and thus more cost-effective, since markedly lower torques have to be transmitted. The synchronization may have a variety of designs including a simple connection of input shafts of the gears to one another to synchronize them with a corresponding arrangement. The synchronization may thus advantageously be designed for markedly lower torques and thus be markedly more compact in dimensions and be dimensioned more cost-effectively.

Abstract: A chair is provided which has a tiltable seat carrier and a tiltable backrest on the backrest carrier which are forcibly coupled to one another, and which has an individual adjustment feature for the tilt of the seat carrier in relation to the backrest carrier. Provided on the underside of the seat carrier is a bearing block having a slideway contour and a vertical slot in which the flange of a lifting element is mounted vertically movably, wherein the lifting element has a substantially triangular collar which slides on the substantially rectangular slideway contour when the flange moves vertically. The tilt of the seat carrier can be adjusted to be steeper or flatter by turning the lifting element, and the limit positions are completely stable such that the possibility of automatic unlocking is eliminated.

Abstract: The invention provides an improvement to a chair which has a tiltable seat carrier (1) and a tiltable backrest (2) on the backrest carrier (5) which are forcibly coupled to one another, and to an individual adjustment of the tilt of the seat carrier (1) in relation to the backrest carrier (5). The improvement consists in the fact that there is provided on the underside of the seat carrier (1) a bearing block (10) having a slideway contour (14) and a vertical slot (13) in which the flange (9) of a lifting element (7) is mounted vertically movably, and the lifting element (7) has a substantially triangular collar (12) which slides on the substantially rectangular slideway contour (14) when the flange (9) moves vertically. This means that the tilt of the seat carrier (1) can be adjusted to be steeper or flatter by turning the lifting element (7), and the limit positions are completely stable. The possibility of automatic unlocking is ruled out.

Abstract: A chair, such as a swivel chair for the office, has an armrest that is made up of an armrest carrier, which includes a carrier and a sleeve sliding thereon and attached to the seat at the bottom by a seat flange which can be displaced transversely to the seat direction, and of an arm support, which can be displaced longitudinally via a guide and can be rotated via a rotary part mounted in a rotary bearing. The guide is arranged parallel, but eccentrically in relation, to the axis of symmetry of the arm support. Since the rotatability of the arm support is at least 1800, it is possible to set different clear distances between the two arm supports of the chair.

Abstract: In a neck support for a chair, a head cushion is articulated, via an articulation bearing, on a guide sleeve displaced on a retaining bar, articulated on the top edge of a backrest via a further articulation bearing, the retaining bar and the guide sleeve being of rectilinear design, this resulting in linear height adjustability of the neck support. The bottom articulation bearing and preferably also the top articulation bearing each comprise a cylinder on the retaining bar and two cylinders on a bearing foot or on a link plate, it being possible for the first cylinder to rotate in a controlled manner between the two second cylinders via blocks.

Abstract: In the case of a chair with adjustable seat depth, the seat comprises a rigid supporting panel (1) and a single-piece, longitudinally flexible seat panel (2) which bears the seat cushion (3) and is connected in a longitudinally displaceable manner to the supporting panel (1). The longitudinal displaceability is achieved by providing guide strips (6) mounted in guideways (4) on the top side of the seat panel (2), the guide strips being fastened on the supporting panel (1) via screws (7), and the screws (7) passing through slots (5) on the base of the guideways (4). The supporting panel (1) is advantageously designed as a frame and consists of cast aluminium, and the seat panel (2) consists of polypropylene. This achieves an optimum sliding pairing.

Abstract: A neckrest, for a chair having a backrest, is configured to be attached to a backrest shield in a height-adjustable manner. The neckrest includes a circular cross-section retaining rod, configured to be connected to the backrest shield via an articulated or movable connection so as to be tiltable by up to approximately 30° in a vertical plane vertically with respect to a surface of the backrest, and a circular cross-section guide sleeve, mounted on the retaining rod so as to be slidingly shiftable by up to approximately 200 mm on the retaining rod. The retaining rod includes a molding on a side thereof which is closest the backrest and seated in a housing having a recess. The molding has a round surface which slides under pressure on a polyurethane rubber material friction dampening device so as to achieve the articulated connection.

Abstract: In the case of a chair with adjustable seat depth, the seat comprises a rigid supporting panel (1) and a single-piece, longitudinally flexible seat panel (2) which bears the seat cushion (3) and is connected in a longitudinally displaceable manner to the supporting panel (1). The longitudinal displaceability is achieved by providing guide strips (6) mounted in guideways (4) on the top side of the seat panel (2), the guide strips being fastened on the supporting panel (1) via screws (7), and the screws (7) passing through slots (5) on the base of the guideways (4). The supporting panel (1) is advantageously designed as a frame and consists of cast aluminium, and the seat panel (2) consists of polypropylene. This achieves an optimum sliding pairing.

Abstract: In the case of a neck support for a chair, the head cushion (6) is articulated, via an articulation bearing (5), on a guide sleeve (4) which can be displaced on a retaining bar (2), which is articulated on the top edge of the backrest (1) of the chair via a further articulation bearing (3), the retaining bar (2) and the guide sleeve (4) being of rectilinear design, this resulting in linear height adjustability of the neck support. The bottom articulation bearing (3) and preferably also the top articulation bearing (5) each comprise a cylinder (7) on the retaining bar (2) and two cylinders (8, 9) on the bearing foot (10) or on the link plate (26), it being possible for the first cylinder (7) to rotate in a controlled manner between the two second cylinders (8, 9) via blocks (13). In particular in combination with a height-adjustable backrest, the neck support according to the invention has an optimum adjustment range for the user's head and neck.

Abstract: In the case of a chair, in particular a swivel chair for the office, the armrest is made up of an armrest carrier, which comprises a carrier (1) and a sleeve (2) sliding thereon and is attached to the seat at the bottom by a seat flange (3) which can be displaced transversely to the seat direction, and of an arm support (10, 11), which can be displaced longitudinally via a guide (7) and can be rotated via a rotary part (4) mounted in a rotary bearing (5). The guide (7) is arranged parallel, but eccentrically in relation, to the axis of symmetry of the arm support. Since the rotatability of the arm support is at least 180°, it is possible to set different clear distances between the two arm supports (10, 11) of the chair.

Abstract: A neckrest, for a chair having a backrest, is configured to be attached to a backrest shield in a height-adjustable manner. The neckrest includes a circular cross-section retaining rod, configured to be connected to the backrest shield via an articulated or movable connection so as to be tiltable by up to approximately 30° in a vertical plane vertically with respect to a surface of the backrest, and a circular cross-section guide sleeve, mounted on the retaining rod so as to be slidingly shiftable by up to approximately 200 mm on the retaining rod. The retaining rod includes a molding on a side thereof which is closest the backrest and seated in a housing having a recess. The molding has a round surface which slides under pressure on a polyurethane rubber material friction dampening device so as to achieve the articulated connection.

Abstract: A chair has both a tiltable seat and a tiltable backrest mounted on a backrest support. The chair includes a pedestal mounted on a bottom of the tiltable seat. An eccentric disk is seated in the pedestal so as to be movable therein. A rod eccentrically penetrates the eccentric disk via a prismatically-shaped cross-section recess through the eccentric disk so that the rod is not movable with respect to the eccentric disk. A handle is connected on an outer end of the rod for use in turning the rod together with the eccentric disk. An arm is mounted on the backrest support of the tiltable backrest, wherein the rod is seated in the arm in a movable manner.

Abstract: A continuously operating surface miner designed basically with a milling roller for the accurate, selective mining of sedimentary beds. The parameters cutting height, cutting width and feed speed are decisive for the performance capacity of surface miners. How the miner begins a block to be mined, how it finishes it and changes over to a new block to be mined is significant as well. The particular technology that can be used depends essentially on the mobility of the miner and the possibility of the engagement of the milling roller with the material to be mined. A three-caterpillar chassis for the miner and for arranging the milling roller (15a) in front of the said chassis in the direction of mining is provided. The milling roller (15a) is mounted on a transverse frame (15b) and is fastened by same to the superstructure (8) of the miner. High mobility of the miner is achieved due to this arrangement of the milling roller and the use of the chassis.

Abstract: A milling roller module for a surface miner, includes a milling roller operating with undershot for loosening the material from the block being mined, a support frame for fastening the milling roller to the surface miner, and a takeup chute for supporting the intermediate conveying of the loosened material in the area of the milling roller and for transferring the material to the downstream discharge belt in a specific manner. The drives are placed into the milling roller and the feed lines are led into the milling roller together with the support frame for fastening the milling roller from the side in the upper third of the milling roller diameter. As a result, it is possible to perform mining operations up to a cutting depth that is equal to half the roller diameter. A takeup chute is provided to transfer the material from the milling roller onto the downstream discharge belt in a specific manner.

Abstract: A backrest, in particular for an office chair, is indicated, in which backrest a cover is stretched onto a frame. In order for it to be possible for the frame to be introduced into the cover in a simple manner, the frame is of hinged and rotatable design. The cover is stretched in the transverse and longitudinal direction by insertion of a transverse bow into the frame and fastening of the cover to the transverse bow.