Abstract: A spark plug for an internal combustion engine has a housing and an insulator held in a clamping area of the housing, which electrically insulates a central electrode from the housing, a heat transfer area having a circumferential gap between the housing and the insulator being provided in the area of a combustion chamber-side end section of the housing for dissipating the heat absorbed by the insulator. The heat transfer area and the clamping area are spatially separated from each other.

Abstract: A spark plug for an internal combustion engine includes a ground electrode, a center electrode, an insulator, a housing, and a folded packing which is situated on an outer circumference of the housing. The folded packing has: a hollow profile in cross section; a free leg directed outwards; and a support region. The folded packing lies on a contact surface in a support region, and the free leg is situated at an angle to the support region. The folded packing is pressed together during the mounting of the spark plug, and the free leg of the folded packing is designed to bend over in the direction of the support surface during the mounting to provide a diameter enlargement of the folded packing.

Abstract: A method for manufacturing a spark plug having a central electrode and a ground electrode, the central electrode and the ground electrode being spaced apart from each other and a first planar electrode face being formed on the central electrode and a second planar electrode face being formed on the ground electrode by a separative manufacturing method.

Abstract: Process for the production of decorative laminates having pores in register, using a printing ink which comprises an additive which prevents the wetting of the printed layer with impregnating resins, printing ink suitable for carrying out the process, and decorative laminates having pores in register which are obtainable by the process.

Abstract: A method of joining an electrode of a spark plug with a noble metal is described, the noble metal being joined locally with the electrode using a thermal input produced by a continuously operating laser beam.

Abstract: A buttonhole sewing machine comprises a top arm (1) with a needle (6) movable in up and down reciprocation and a base plate (2). A buttonhole cutting device (13) is provided, having a knife (36) which is disposed on the base plate (2) and comprises a straight cutting edge (37) that extends in the y direction and an eye cutting edge (38). A cutting block (15) cooperates with the knife (36). The knife (36) and the cutting block (15) are motor-adjustable one in relation to the other in the y direction.

Abstract: A method of joining an electrode of a spark plug with a noble metal is described, the noble metal being joined locally with the electrode using a thermal input produced by a continuously operating laser beam.

Abstract: A spark plug includes at least one ground electrode with a reduced temperature level. The spark plug encompasses a tubular metallic housing that has, at the combustion-chamber end, an outer rim on which at least one ground electrode is positioned. The cross-sectional area of the at least one ground electrode increases toward the outer rim of the housing.

Abstract: A buttonhole sewing machine comprises a top arm (1) with a needle (6) movable in up and down reciprocation and a base plate (2). A buttonhole cutting device (13) is provided, having a knife (36) which is disposed on the base plate (2) and comprises a straight cutting edge (37) that extends in the y direction and an eye cutting edge (38). A cutting block (15) cooperates with the knife (36). The knife (36) and the cutting block (15) are motor-adjustable one in relation to the other in the y direction.

Abstract: A spark plug includes an insulator situated in a housing, in which the insulator has a sealing surface which lies against a sealing surface of the housing or against a sealing element that is situated between the housing and the sealing surface of the insulator. An arrangement exerts a force on the insulator that is directed in the longitudinal direction of the spark plug in such a way that the sealing surface of the insulator presses upon the sealing surface of the housing or upon the sealing element, and thus the insulator in the housing is sealed in a gastight manner.

Abstract: Method for control of a proportional magnet comprising a magnet core, a magnet armature, a magnet coil for operating a control element in a shift valve or a proportional pressure-control valve, particularly a pressure-control valve for clutch operation in an automatic motor vehicle transmission, and comprising an electronic control device, whereby the magnet core may be moved back and forth between a control region and a hold region with a magnetic hold position of the magnet armature and a defined transition from the control region to the hold position may be executed and whereby mechanisms are provided for recognition of the movements of the magnet armature.

Abstract: An electrode and spark plug for an internal combustion engine including an electrode of this type as a center electrode. The electrode includes an electrode base element made of a first material and an end section that is integrally joined to the electrode base element, with this end section including a first area that is integrally joined to the first material and is made of a platinum-containing material and including a second area that is integrally joined to the first area and is made of an iridium-containing and/or ruthenium-containing material. In a method for manufacturing an electrode of this type, a first recess is stamped in the electrode base element, a first preform is inserted into the first recess, the first preform is melted, thereby forming a first alloy, a second recess is stamped in an area of the first alloy, a second preform is inserted into the second recess, and the second preform is melted, thereby forming a second alloy.

Abstract: A spark plug for an internal combustion engine includes a middle electrode which has an electrode base body (5) with an end face (51) oriented toward the combustion chamber, to which end face a precious metal platelet (8) is attached. An end section (15) of the electrode base body oriented toward the combustion chamber is formed in the shape of a truncated cone. The precious metal platelet (8) is likewise formed in the shape of a truncated cone and the diameter of the end face (52) of the electrode base body oriented toward the combustion chamber corresponds to the diameter of the end face (84) of the precious metal platelet oriented away from the combustion chamber. A method for producing middle electrodes for a spark plug of an internal combustion engine is also proposed.

Abstract: A spark plug includes at least one ground electrode with a reduced temperature level. The spark plug encompasses a tubular metallic housing that has, at the combustion-chamber end, an outer rim on which at least one ground electrode is positioned. The cross-sectional area of the at least one ground electrode increases toward the outer rim of the housing.

Abstract: A buttonhole sewing machine comprises a buttonhole cutting device which includes a knife and a cutting block unit with several cutting blocks, one of which at a time being movable into a position of cooperation with the knife. The cutting blocks are mounted on an anvil that is stationarily joined to the sewing machine. The knife is movable from above against the anvil.

Abstract: A buttonhole sewing machine comprises work piece clamps with a pneumatically actuated displacement drive for displacement relative to each other of the work piece clamps from an initial position of spread by a length of spread into a final position of spread. Only the first work piece clamp is displaceable relative to the x-y table. The displacement of the first work piece clamp is defined between two stop positions. A control unit stores data for triggering an x drive for reversed displacement of the x-y table by half the given length of spread.

Abstract: A buttonhole sewing machine comprises a buttonhole cutting device which includes a knife and at least one cutting block that cooperates with the knife. Provision is made for a cutting drive for motion of the knife and the cutting block relative to each other by variable cutting force, the cutting drive comprising several linear drives which are connected in parallel and pneumatically actuated selectively.

Abstract: A buttonhole sewing machine comprises a buttonhole cutting device which includes a knife and a cutting block unit with several cutting blocks, one of which at a time being movable into a position of cooperation with the knife. The cutting blocks are mounted on an anvil that is stationarily joined to the sewing machine. The knife is movable from above against the anvil.

Abstract: A buttonhole sewing machine comprises a buttonhole cutting device which includes a knife and at least one cutting block that cooperates with the knife. Provision is made for a cutting drive for motion of the knife and the cutting block relative to each other by variable cutting force, the cutting drive comprising several linear drives which are connected in parallel and pneumatically actuated selectively.

Abstract: Within the scope of the method for compensating angular misalignments for the variator of a continuously variable belt-drive transmission having cone pulleys disposed in pairs and one pushing linked band as torque transmitting belt-drive element, the fixed cone pulley of a variator side is designed with a curved outline, a pushing link displacement path being calculated with reference to a crowned pushing link flank outline and then the pushing link displacement path to the other side of the variator is calculated so that the displacement path is free of angular misalignment.