摘要:
Es werden Zusammensetzungen aus einem löslichen Polyimid und Polypyrrol beschrieben. Diese lassen sich vor zugsweise durch anodische Oxidation von Pyrrol oder Pyrrolderivaten an polyimidbeschichteten Elektroden her stellen. Die Zusammensetzungen ermöglichen die Herstellung von freitragenden, elektrisch leitfähigen Filmen.
摘要:
The disclosure relates to improved system grounding that includes two system grounding paths for card caged electronic modules. A grounding path through the card cage and a grounding path through the system power supply are used to minimize noise, i.e., reduce unwanted induced superimposed transient voltage levels.
摘要:
The invention is concerned with a door in a construction forming an electromagnetically protected space, wherein the contact zone between the door (1) and the stationary construction (2) has been sealed by means of a labyrinth structure (3 to 6) attenuating the transition of interference fields. A problem related to the prior-art door constructions f this type is the loss of the ease of operation of the door and loss of the customary operating properties of a normally hinged door when an efficiently attenuating labyrinth structure is used, as a result of the high compression force required for closing the door as well as of the tendency of the pivoting movement of the door to damage the labyrinth structure. In the invention, this problem has been overcome in practice so that the movement of closing of the door (1) consists of a normal pivoting movement around an axis (8) defined by the hinge devices (7) as well as of a substantially linear controlled final movement producing a contact preventing the transition of interference fields.
摘要:
An electromagnetic wave-shielding material is disclosed. The material is comprised of one or more electromagnetic wave-shielding layers and one or more surface layers. The shielding layers are comprised of a thermoplastic resin, an aluminum or aluminum alloy and electrically conductive carbon black. The surface layers are comprised substantially of thermoplastic resin. The proportion of the carbon black and aluminum in the shielding layer are from 5 to 50% by volume and 5 to 50% by volume, respectively, provided the total proportion of the carbon black and aluminum is 10 to 60% by volume. The different in solubility parameter between the thermoplastic resin of the surface layer and the thermoplastic resin of the shielding layer is 3.0 or less. The material has superior mechanical strength and electromagnetic wave-shielding properties.
摘要:
A three layer printed circuit board comprises upper and lower layers (A, C) which provide terminal locations (1A-6A) (1C-6C) for connection to pins of electrical connectors or electronic components which are to be connected in parallel by conductor tracks of the circuit board. In order to achieve an even distribution of conductor tracks between the layers (A, C) only certain terminal locations (2A, 4A, 6A, 1C, 3C, 5C) are connected to respective conductor tracks, the locations of the respective layers being electrically connected by plated-through holes. A conductive layer (B) providing a ground plane is located between the upper and lower layers (A, C) and has non-conductive areas (lB-6B) providing clearance for the plated-through holes. Shield tracks (7A-9A, 7C-9C) are located between the conductor tracks and are connected to the ground plane (B) by plated-through holes (10) so that they form closed conductive loops providing shielding against capacitative and inductive cross-talk between the conductor tracks.
摘要:
Eine Abschirmung für elektronische Baugruppen besteht zur Erfüllung der unterschiedlichen Anforderungen wie Feuersicherheit, Biegsamkeit, Kurzschlußsicherheit und möglichst billiger Herstellbarkeit aus einer Aluminiumfolie, einer hoch verdichteten und kalt gewalzten Preßspanschicht sowie aus einer auf der zur Aluminiumfolie entgegen gesetzten Seite der Preßspanschicht aufkaschierten Klarsicht folie mit jeweils entsprechenden kritischen Werten.
摘要:
A recoverable fabric for example a weave having a conductive metal warp and a recoverable polymeric weft may be provided with solder to provide an article for screening electrical components.
摘要:
Die Erfindung bezieht sich auf eine Verriegelvorrichtung für ein zweiteiliges Tastaturgehäuse aus Kunststoff mit innenseitig angeordneter Schirmung. Eine befriedigende Schirmung wurde bei derartigen Kunststoffgehäusen bisher nur dadurch erreicht, daß in das Tastaturgehäuse ver schraubte Blecheinsätze eingesetzt werden. Dies ist aber mit einem hohen Aufwand verbungen. Erfindungsgemäß wird der hohe Aufwand dadurch vermieden, daß das Tastaturun terteil 1 mindestens an einer Seite, vorzugsweise an der Vor derseite Durchbrüche 2 aufweist, in die am Tastaturoberteil 10 befestigte Haken 9 eingreifen. Unterhalb der Durchbrüche 2 ist eine Verschlußschiene 4 verschiebbar angeordnet, die im Abstand der Haken 9 mit schräg nach oben gebogenen Kon taktzungen 5 und mit Kontaktbuckeln 6 versehen ist. In der Mitte der Seiten der Tastaturunterteile 1, vorzugsweise an der Vorderseite, befindet sich ein Steg 7 und in der Ver schlußschiene 4 eine Öffnung 8, die aufeinander so abges timmt sind, daß die Verschlußschiene 4 mittels Werkzeug verschiebbar ist. Die Verriegelung nach der Erfindung ist vor zugsweise bei Tastaturgehäusender Datentechnik verwend bar.
摘要:
An electric double layer capacitor having polarizable electrodes (106,107) including activated carbon fibers which are fully activated and have a large specific surface area, and a method for making the same. Each of the polarizable electrodes is composed of an activated carbon element having a surface fiber ratio (total geometric surface area of fabric/total geometric surface area of secondary fibers or strands) of 0.01 or more. Each activated carbon element is in the form of a woven fabric, nonwoven fabric, felt or the like including activated carbon fibers.