Abstract: A corona ignition device is described comprising a central electrode, to which at least one ignition tip leads, and an insulator, which surrounds the central electrode. According to this disclosure, provision is made for the at least one ignition tip to comprise a plurality of wires touching each other.

Abstract: This disclosure relates to a corona ignition device having: an insulator, which bears an electrically conductive coating, which forms a tubular face; a central electrode, which sits in the insulator and leads to at least one ignition tip; and a holder, in which the insulator sits. According to this disclosure, the insulator has an annular shoulder, on which is situated the end of the tubular face of the coating that faces away from the at least one ignition tip. A method for producing a corona ignition device is also described.

Abstract: A spark plug for a prechamber internal combustion engine, having: a body with a passage and a front end; a center electrode located in the passage and that projects past the front end; an insulator that surrounds a section of the center electrode and has a tapering front end that together with the passage forms a free annular space within the body; a ground electrode with an annular ignition section that surrounds a section of the center electrode located outside the body, forming a spark gap; the ground electrode has a mounting section connected to the front end of the body, and at least two web sections connecting the ignition section to the mounting section; located between the web sections are scavenging ports through which the annular space is in connection with the environment outside the spark plug.

Abstract: In a lateral flow test (LFT) device, the liquid conduit element 20 is formed from a substrate 21, 22 or 24 having at least two layers, including a first layer 21b, 22b or 24b not exceeding 75 ?m in thickness formed from a porous material for wicking liquid, and a second layer 21a,22a or 24a of additional thickness formed from a generally non-porous polymer material acting as backing layer. The layered arrangement is incorporated into an LFT device to reduce sample volume requirements.

Abstract: A spark plug haying a center conductor, an insulator surrounding the center conductor, at least two electrodes forming a spark gap, and a spark plug body surrounding the insulator and haying an external thread arranged at the front end of the spark plug for screwing in to an internal combustion engine. A component that is attached to the front end of the spark plug and comes into contact with fuel during operation is formed as a sintered powder injection molded part, referred to as a MIM component.

Abstract: Disclosed is an inventive method for controlling a corona ignition device of an internal combustion engine. A corona discharge, which ignites fuel in a combustion chamber of the engine, is generated by applying a voltage to the corona ignition device. An actual value that is characteristic of the nitrogen oxide concentration of the exhaust gas is compared with a setpoint value, and, if the actual value deviates from the setpoint value by more than a specified threshold value and the actual value is greater than the setpoint value, the voltage is reduced after the comparison.

Abstract: The invention generally relates to methods and kits for capturing sperm nucleic acids from or in a biological sample. In one embodiment the method the method comprises, contacting the sample with a lysis solution, having a protamine-DNA complex, to lyse the cell and applying a protamine-specific antibody. This results in the protamine-specific antibody binding to the protamine-DNA to form a complex which may be captured, purified, or detected. Also provided are kits for carrying out the disclosed methods.

Abstract: A spark plug having a front end of a spark plug body that projects over a front end of an insulator, a recess that is arranged at the front end of the insulator from which a center electrode projects and forms an air spark gap with a ground electrode, an annular intermediate space that is formed by the recess between the insulator and the center electrode, and a surface of the recess that runs in an at least partially curved manner between the center electrode and the end of the spark plug body so that the recess forms an insulating section that prevents a sliding spark between the center electrode and the spark plug body.

Abstract: The invention discloses a reduced thickness membrane matrix for carrying liquids consisting of a cellulosic material with a thickness of between 10 and 50 ?m and a pore size between 0.1 ?m and 20 ?m for use with diagnostic tests such as lateral flow tests, thereby reducing the amount of test reagents required.

Abstract: A sealing ring for a spark plug that has an external thread for screwing into an internal combustion engine, a collar and a thread undercut between the external thread and the collar. The sealing ring includes a ring-shaped solid sealing element made from metal. The sealing element has two planar annular sealing surfaces that are arranged parallel to one another. An annular retaining element composed of an elastomer for engaging in the thread undercut of the spark plug in a self-retaining manner is attached to the sealing element on the inner ring side thereof. Also included is a spark plug comprising such a sealing ring, and an internal combustion engine comprising such spark plugs.

Abstract: A spark plug with an inner conductor, a center electrode connected with the inner conductor, an insulator surrounding the inner conductor and having a front end and a rear end, a spark plug body surrounding the insulator and having a front end and a rear end, and a ground electrode connected with the front end of the spark plug body. The front end of the spark plug body projects over the front end of the insulator, a recess is arranged at the front end of the insulator from which recess the center electrode projects and forms an air spark gap with the ground electrode, an annular intermediate space is formed by the recess between the insulator and the center electrode, and a surface of the recess runs in an at least partially curved manner between the center electrode and the end of the spark plug body so that the recess forms an insulating section that prevents a sliding spark between the center electrode and the spark plug body.

Abstract: A method for controlling a corona ignition system in which a corona discharge is produced at an ignition electrode by exciting a resonating circuit with an AC voltage produced by a high-frequency generator. The AC voltage is adjusted to a target value depending on an operating state of the engine. Combustion onset is determined by evaluating an electrical variable of the resonating circuit and the target value of the AC voltage is reduced by a predefined value following a predefined number of engine cycles or a predefined operating period. The determined combustion onset is evaluated in one or more engine cycles. The target value for the momentary engine operating state is then increased if, by evaluation of the combustion onset, it is found that a predefined requirement is no longer met. Otherwise, the reduced target value is stored as a new target value for the momentary engine operating state.

Abstract: A spark plug having a spark plug body, a center electrode, and a rod-shaped ground electrode that is attached to a front end of the spark plug body and has an electrode end section with an end surface and two side surfaces. The electrode end section is provided with a step onto which is attached a precious metal component with an ignition surface that, together with the center electrode, forms a spark air gap. The step formed in the electrode end section and the precious metal component attached thereto extend across the entire width (B) of the electrode end section so that the precious metal component is flush with the electrode end section on the two sides surfaces, as well as the end surface.

Abstract: A surgical microscope (1) for magnified observation of an operation field at a patient (4) comprises, for keeping the patient (4) better informed or entertained, an additional display device (2) for displaying information or media to the patient (4). Furthermore, an appropriately embodied retrofitting set for a surgical microscope is specified.

Abstract: Ignition device for igniting fuel/air mixtures in a combustion chamber of an internal combustion chamber by a corona discharge. The device includes an ignition electrode and an outer conductor surrounding the ignition electrode. The outer conductor has a front end and a rear end, and comprises an electrical insulator arranged between the ignition electrode and the outer conductor, from which insulator at least one tip of the ignition electrode protrudes. The at least one tip of the ignition electrode is arranged in a space that is shielded by a cap associated with the insulator, said cap having an inner side facing the insulator and an outer side facing away from the insulator as well as one or more holes, by means of which the shielded space is connected to a space arranged on the outer side of the cap.

Abstract: Described is a spark plug for gasoline engines with an elongated hollow body made of metal, said body having a forward end with an undercut formed by an interior annular shoulder of the body and a rear end, with an elongated ceramic insulator which is mounted in the body and has a rear end that projects beyond the rear end of the body and has a forward end beyond which the forward end of the body projects, with a center electrode which is inserted into the insulator, projects beyond the forward end thereof, and is connected to a metal connection pin in an electrically conductive manner, said connection pin projecting beyond the rear end of the insulator, and with at least one ground electrode which starts from the forward end of the body and is approached to the center electrode to an electrode distance (EA) to form a spark gap.

Abstract: The invention relates to a spark plug for a gas-fired internal combustion engine, and Includes a metallic body, with an insulator fastened in the body. A central electrode, leads through the insulator and includes a protruding end of a precious metal alloy. An annular ground electrode is fastened to the body and surrounds the end of the central electrode which, at the inside thereof facing the central electrode is provided with a precious metal or with a precious metal alloy. The mutually facing surfaces of the central electrode and ground electrode formed by the precious metal or the precious metal alloy are coaxially disposed cylinder surfaces. A cap is provided and attached to the body and which, after installation of the spark plug into a combustion chamber of the internal combustion engine, shields the central electrode and the ground electrode from the combustion chamber.

Abstract: A method for producing a spark plug which contains an inner conductor, an insulator surrounding the inner conductor, a spark plug body surrounding the insulator, and two electrodes forming an ignition gap. The first electrode is a center electrode connected to the inner conductor in an electrically conducting manner and the second electrode is a ground electrode connected to the spark plug body in an electrically conducting manner. An iridium component which contains more than 95 percent by weight of iridium is welded onto one of the electrodes. An iridium component that is punched out of an iridium sheet and has a thickness that is less in size than its diameter is also employed.

Abstract: A spark plug having a spark plug body, a center electrode, and a rod-shaped ground electrode that is attached to a front end of the spark plug body and has an electrode end section with an end surface and two side surfaces. The electrode end section is provided with a step onto which is attached a precious metal component with an ignition surface that, together with the center electrode, forms a spark air gap. The step formed in the electrode end section and the precious metal component attached thereto extend across the entire width (B) of the electrode end section so that the precious metal component is flush with the electrode end section on the two sides surfaces, as well as the end surface.

Abstract: Described is a spark plug for gasoline engines with an elongated hollow body made of metal, said body having a forward end with an undercut formed by an interior annular shoulder of the body and a rear end, with an elongated ceramic insulator which is mounted in the body and has a rear end that projects beyond the rear end of the body and has a forward end beyond which the forward end of the body projects, with a center electrode which is inserted into the insulator, projects beyond the forward end thereof, and is connected to a metal connection pin in an electrically conductive manner, said connection pin projecting beyond the rear end of the insulator, and with at least one ground electrode which starts from the forward end of the body and is approached to the center electrode to an electrode distance (EA) to form a spark gap.