摘要:
The housing is essentially spherically shaped, formed with a flattened end wall (14), through which a sound receiving opening (42) extends in axial direction, located eccentrically with respect to the spherical housing. A volume control button (50) covers the sound receiving opening, the volume control button being maintained by a small distance (h) spaced from the spherical end wall to permit entry of sound to the sound receiving opening, while preventing masking of the sound receiving opening by the finger of a user, and free entry of contamination thereto. Preferably, the button is connected to the volume control element by an inwardly extending collar (52) which snaps over an adjustment rim (35) on a volume control positioned axially centrally on a printed circuit board (31) secured within the housing and passing through a central opening (47) formed therein. The flat end wall (14) can be formed with additional openings to permit access to adjustment screwdriver heads (36) of trimmer resistors, the additional openings likewise being masked by the volume control button for protection and to prevent contamination.
摘要:
Methacrylamidopropyl trimethylammonium chloride and similar quaternized aminoalkyl esters or aminoalkylamides of acrylic acid or methacrylic acid are purified by extraction of an aqueous solution thereof with dichloromethane to remove impurities, such as allyl methacrylamide, which may be formed by a Hofmann degradation of the compounds.
摘要:
A hearing aid has a circuit board having conductor strips thereon; first plug-in elements mounted on the circuit board and being electrically connected to selective conductor strips; a plurality of circuit board-supported modular structural units; and second plug-in elements mounted on each circuit board-supported modular structural unit. The first plug-in elements cooperate with respective second plug-in elements for securing selected circuit board-supported modular structural units on the circuit board.
摘要:
A sliding element comprises at least one surface for sliding contact with a running face, wherein a wear layer and a run-in layer made from carbon are applied to the surface, and is characterized in that the run-in layer comprises hydrogen and nanocrystalline carbide phases. In a method for manufacturing a sliding element, the run-in layer is applied by means of a PVD process. A sliding system has an above-described sliding element and a body having a running face. A coating for a sliding element comprises a wear layer which can be applied to the upper side of the sliding element, and a run-in layer which is configured as a carbon layer, and is characterized in that the run-in layer comprises hydrogen and nanocrystalline carbide phases.
摘要:
The invention relates to a connecting strip (1) for telecommunications and mid-range communications technology, comprising a housing (2) and at least two contact elements (11), wherein the contact element (11) comprises a first contact (12) for the connection of wires or cables and a second contact (13) for contacting a printed circuit board, the second contact (13) taking the form of a press-fit pin contact or a tuning-fork contact, and in which the first contact (12) is aligned towards the upper side (3) of the housing (2), and the second contact (13) is aligned towards the underside (4) of the housing (2), the first contacts (12) being arranged laterally offset from the longitudinal axis (L) of the housing (2), and on the opposite side at least one fin (8) being arranged so that between the first contacts (12) and the fin (8) a trench (9) is formed, the contact element (11) being constructed with a bracket (15) positioned above the second contact (13), aligned towards the upper side (3) of the housing (2), and arranged underneath the trench (9).
摘要:
The invention relates to a plug-in connector for printed circuits, comprising a plurality of contact elements, whereby said contact elements have two connecting faces each. The one connecting face is configured as an insulation displacement contact for connecting cores and the other connecting face is configured as a tuning fork contact for contacting contact surfaces on a printed circuit. The insulation displacement contacts of the contact elements can be inserted into a plastic housing. At least one lower edge of the insulation displacement contacts is supported on the plastic housing so that the contact elements are captivated in the plastic housing when connecting forces act upon the insulation displacement contacts. The plastic housing comprises at least one chamber-type area. The tuning fork contacts are completely received by the plastic housing in the longitudinal direction. The contact element is configured as a two-part element, a first part of the contact element comprising the insulation displacement contact and the second part comprising the tuning fork contact. One contact arm each is positioned on both parts of the contact element and the two contact arms interact to give a disconnector.
摘要:
The invention relates to an insulation displacement plug-in connector for telecommunications and data technology, comprising a housing (45) and a number of contact elements (43), wherein the contact elements (43) each comprise an insulation displacement contact (54) for connecting cores and a pin contact (53) for making contact with a printed circuit board, wherein at least one extension (55) is arranged between the insulation displacement contact (54) and the pin contact (53).
摘要:
The invention relates to a tool for connecting cable cores, in particular of insulated telecommunication and data cables, to an insulation-piercing contact element, with a ram, which is formed with a ram head, by means of which the cable cores can be pressed into the insulation-piercing contact, the ram head being shaped in such a way that at least two cable cores can be pressed in simultaneously into at least two insulation-piercing contact elements lying next to each other.
摘要:
A joining method head is proposed for fixation to a movable frame, in particular to a robot, having a holding means for an element to be joined to a part, a joining drive means to move the holding means along a joining direction for joining, and a feeding means for feeding elements to the joining method head. Here a control means to control the joining drive means is arranged at the joining method head spatially distanced from the holding means and the joining drive means, so that the holding means and the joining drive means form a joining tool of small dimensions, and means are provided to pass on the elements fed to a transfer station of the feeding means in each instance to the holding means from in front.