Abstract:
A method of preparing a large-current printed circuit board comprises inserting a fastener with a bottom flange in a through-hole formed in a printed circuit board so that the bottom flange is engaged with a surface of the printed circuit board, putting a washer having substantially the same outer diameter so the flange around the fastener at the other surface of the board, forming a radial extension at the outer side of the washer by caulking the fastener, whereby the fastener is fixed to the printed circuit board by means of the radial extension and the bottom flange wherein the washer is interposed between the radial extension and the printed circuit board.
Abstract:
A busbar interconnecting structure consists of a tab formed integral with one busbar and a slot formed in another busbar. The two busbars are firmly connected by pressing the tab into the slot. The slot has the inner surfaces of its shorter sides formed in an arc so that even when the tab is inserted misaligned into the slot, a four-point contact is obtained at all times between the tab and the slot. The slot is also provided at the shorter sides with risers whose inner surfaces are also formed in an arc shape to increase the contact area between the tab and the slot, thus assuring a more stable electrical contact. The tab, when viewed in cross section, may be rounded at the shorter sides to match the curvature of the internal arc surfaces of the slot, thereby providing a still more stable surface contact.
Abstract:
An electrical junction system for automotive internal wiring has a wiring board provided with branching conductors formed by a multiplicity of bus bars on an insulation plate, the branching conductors being adapted to be connected to electric wires in a wiring harness to form branching electric circuits. The electrical junction system has a printed circuit board detachably mounted on the wiring board, the printed circuit board generally or inclusively carrying a plurality of circuits incorporating a multiplicity of function parts which are used semi-permanentally such as relays and associated control elements.
Abstract:
An apparatus for interconnecting functional component circuits and branch circuits of a wiring harness. A wiring board includes a plurality of tab contact members and mounted on one surface of the wiring board is a first printed-circuit board including a plurality of control element components forming functional component circuits. Also mounted on the other surface of the wiring board is a second printed-circuit board which includes the functional element components of the components forming the functional component circuits.
Abstract:
A transitional printed circuit board (10) is disclosed for terminating four multiconductor flat electrial transmission cables (44, 46, 48, 50) wherein only a single substrate (12) is utilized. A first electrical plane (A) is formed on one side of the substrate and a second electrical plane (B) is formed on an opposing side of the substrate with the substrate material in between serving as an insulator. Each electrical plane includes a ground plane (26, 41) and spaced electrical lands (14, 16, 32 ,34). Plated through holes (24) allow the lands from opposing sides to be connected to the opposite side for programmed termination. A series of electrical pads (22, 42) provide for termination to the prongs (52a, 52b) of terminal connector (52). Two cables may be terminated on each electrical plane of the printed circuit board by terminating ground wires of the first cable to the ground plane (26, 41), and the signal wires to the electrical lands (14, 32). The next electrical cable is terminated by connecting signal wires to lands (16, 34). The ground wires of the second cable on each electrical plane are terminated at a bus bar bridge (28, 43) which spans electrical traces (18, 36) which interconnect spaced rows of lands.
Abstract:
An interconnection apparatus for wiring harnesses includes an insulating wiring board and a cover for covering the wiring board. The wiring board is formed on one surface with a busbar pattern of a busbar to form branch conductive paths and on the other surface with a printed wiring pattern interconnecting the branch conductive paths and functional components.
Abstract:
A resistor module which is small in size and easy to probe for measuring and in which a plurality of resistors are formed on the surface of an insulated substrate, an insulating layer is provided to extend over the resistors and conductor patterns for connection of the resistors, and a conductor bar to be connected with a power source pattern or grounding pattern of a printed circuit board is mounted on the insulating layer.
Abstract:
A laminated bus bar comprises a pair of elongated flat conductors separated by a layer of insulating material which is provided with longitudinally spaced cut-outs. Capacitors which are comprised of a flat wafer of solid dielectric material are positioned in each of the cut-outs in the layer of insulating material and the capacitor plates are electrically and mechanically connected to the conductors.
Abstract:
A multilayer conductor strip construction for interconnections in a circuit module is disclosed wherein narrow, flat and elongated sections of multilevel laminations retain the high density characteristic of multilayer construction and lateral extensions of flat conductors outside the laminations expose ends of the conductors at connection sites of a printed circuit board. Uniformly spaced holes in the circuit boards provide the sites for solder connections to circuit components positioned over the strips. The holes are arranged in parallel rows between conductor strips and are staggered to provide for high density interlacing of conductor ends projecting laterally from opposing sides of adjacent strips.
Abstract:
An improved wire-routing system for use with reflow wiring machines is disclosed in which the system includes a single-sided printed circuit board having a plurality of wire land pads and integrated circuit land pads located thereon. Wire routing fixtures are also adapted to be positioned on the circuit board; each fixture having a plurality of longitudinally spaced guides positioned near adjacent land pads for receiving portions of the insulated wire as it is strung or routed from one wire land pad to another. Each of the guides extends upwardly on a slant to enable the wire to be directed downwardly flush with the base of the fixture when routed thereby so as not to interfere with subsequent wiring in that area. Power busses are also provided for connection to any desired integrated circuit land pad. The power busses are formed as flat strips and are positioned beneath the fixtures in such a manner that they also do not interfere with the wire-routing operation.