DE2345572A1 - Laboratory experimental cct. board - uses no wires and has grid of conducting paths formed by solderable cross pieces centred on holes - Google Patents

Abstract

The experimental circuit board for constructing mock-up or specimen circuits in the laboratory, consists of an insulating board with a regular array of holes bored through it for contact pins or component wires. The upper surface of the board is covered in a grid of conductive paths which leave each hole insulated from all the other holes. The grid is formed by conductive cross element centred on each hole. The ends of the arms of adjacent crosses face one another with a gap in between, which is narrow enough to be bridged by a blob of solder so that the board does not need any wires. An adjustable connector may complete the assembly for coupling required grid elements.

Description

PATTNTAt! V X LT E

PROF. DR. DR. J. Ri £ ITS KILLS ER * y Q / CC Π Ο

DR.-ING. WOLFRAM COLORFUL £. OH Ό Ό f Δ

DR. KARL GEORG LÖSCH

D- ΘΟΟΟ MÜNCHEN 13, BAUERSTRASSE 22. POST BOX 78Ο FERNRUF (Ο811) 37 BS 83 TELEX S215208 ISAR d

M / 12 8lo

PICO INCORPORATED, Liverpool, N.Y., USA

Switchboard

The invention relates to printed circuit boards and, more particularly, to circuit boards for testing circuits to order prior to production determine their functionality.

Several devices for the manufacture of switchboards are already known, with all of these devices Wires are used which must be arranged and soldered on at both ends to complete the connection. There are also various types of so-called "printed circuits." has been developed. These are for example Circuits, which consist of an electrically conductive Mtitcrial, which on the surface of an electrically non-conductive material is deposited in a predetermined circuit pattern, circuits - which a beforehand have a fixed pattern of conductive material on a non-conductive base, which is achieved by selective etching will, circuits that have a predetermined pattern of electrically conductive material on an electrically non-conductive basis

509812/0567 BATH ORIGINAL

have conductive base, which is generated mechanically, etc. However, none of these circuits can be used universally, so that it is not possible for the user to quickly produce any desired circuit arrangement to achieve any selected electrical device.

The invention now enables laboratory switchboards with unlimited configurations to be achieved in that a matrix of laminated connection ^{surfaces made of copper 1 is} provided, which are not electrically connected to one another, but which are simply and easily bridged with a conductive material, for example a solder, can be connected.

The invention is particularly advantageous because none Wires are used, construction time is reduced, and laboratory board circuits or prototype printed circuits can be built, 'which the circuit boards of the Production are more similar.

One of the greatest disadvantages in the manufacture of such a device has been the risk of short-circuiting one electrical system. According to the invention, this danger is due to the separation and the easy preliminary drawing of the bridges, which require only a drop of solder to close, largely reduced.

The invention thus relates to an electrical circuit which is usually referred to as a printed circuit and has essentially two-dimensional preliminary drawings or patterns of electrical circuits on support surfaces. It is Arranged in a dielectric material is an array of holes, each hole being formed by an array of laminated pads is surrounded by copper. Each pad can be laminated to any other pad through a flat Wire connected, each wire a short one

509812/0567 BATH ORIGINAL

Has interruption, which ensures that a electrical connection does not exist. The lines leading to the components are "inserted through the holes and soldered to the connection surfaces. The brief interruptions can be bridged with solder of a conductive material to complete the circuit. Special these plates are used to form switchboards.

With reference to the accompanying drawings, the invention is exemplified explained in more detail.

Fig. 1 shows a plan view of an embodiment of the Invention.

Fig. 2 shows in a section the structure of the plate.

Fig. 3 shows the copper connection pieces in a detail in plan view of the switchboard and the intervening interrupted points of the electrically conductive connection.

The embodiment of the invention shown in FIG. 1 shows a universally applicable control panel, which for reasons of simple explanation with a relatively small number is provided by lines. If desired, the switchboard can also have a very large number of lines in any one Have configuration. In Fig. 1 are the interruptions in the copper lines to recognize which the different Connect copper pads with which the components. can be connected.

The switchboard according to the invention comprises a plate made of electrically non-conductive material, which is a switchboard or has a base. In the embodiment shown, this plate 1 has a top 2 and a bottom

509812/0567 BAD ORIGINAL '

and a substantially planar rectangular shape. This plate can be molded plastic or any other suitable electrically non-conductive material.

According to the invention, a first group of essentially parallel electrically insulated and physically separated strips or conductor strips and a second group of essentially parallel electrically insulated and physically separated conductor strips are provided, the first and second groups of conductor strips being arranged perpendicular to one another In the exemplary embodiment shown in FIGS. 1 to 3, each of the pin leads k, 5 and 6 preferably has a metallic structure, for example copper, silver or the like, whereby a restriction to metals is not necessary. The strip lines are carried by the plate -1 made of electrically non-conductive material, all of the strip lines k being parallel to one another and perpendicular to all of the strip lines 5, which are also parallel to one another. To explain the mutually perpendicular arrangement of the group of conductive strips 4, 5 and 6, which create an effective structural relationship between them, the positioning of the three exemplary strips 5 is clearly shown in the sectional view of FIG.

As can be seen from Fig. 1, at 7 one of the circuits is closed by a drop of solder, whereby the Flexibility or the wide range of application of the invention is shown. In the embodiment shown in Fig. 1, this connection consists of a drop of solder, which closes the circuit between the pad 8 and the pad 9.

509812/0567

BAD ORlGSNAL

An embodiment of the invention can have a plurality of hole-like connection devices in the plate made of electrically non-conductive material and / or the strips of the first group and / or the strips of the second group at locations where they are superposed. These hole-like connecting devices are denoted by 8 and Io and are located where the conductive strips k and 5 of the web of electrically non-conductive material 1 lie one above the other, whereby controllable electrically conductive connecting devices make the strips 5 and 4 on the opposite side of the plate Connect electrically non-conductive material 1 effectively at the points of superposition. Additional holes are also shown which are generally similar to the connection holes 8 and 9 except that they do not lie at the intersection of the conductive strips k and "5. Certain holes in the conductive strips 5 are located in areas which carry neither one of the strips k nor one of the strips 6 on any of their surfaces, whereby these holes are suitable for the physical attachment of various other auxiliary devices with respect to the circuit board 1 or for use in arranging the circuit board 1 with respect to a further structure Furthermore, certain holes are arranged in such a way that they pass through one or the other of the strips k , 5 or 6, but not at the points where the strips are superimposed 6 possible.

The control panel 1 may be made of a thermoplastic resin, a thermosetting resin, or various others suitable insulation materials must be made. The conductive strips can be flush with the surface of the plate to be or protrude from it. The parts of the conductive strips

509 8 12/0567 BAD ORIGINAL

around the connecting holes or overlapping points of the strips can be round or have other shapes, which are suitable for easier cooperation with the insertable connecting devices that are in contact therewith to be ordered.

The exact compositions, configurations, structures, According to the invention, relative positions and effective relationships of the various components can be mddifiable over a wide range.

509812/0567 BATH ORIGINAL

Claims (2)

_ 7 - PATENT CLAIMS 1. Universally usable with lines provided ^ - "switchboard, characterized by a substantially flat plate (l) made of electrically non-conductive material, a first group of substantially parallel, electrically isolated and physically separated strips (4) made of electrically conductive material and by a second group of substantially parallel electrically insulated and physically separated strips (5) of electrically conductive material, each of the strips (k, 5) of each group being applied to a surface of the sheet of material (1). 2. Switchboard according to claim 1, characterized by a plurality of locharti'gen connecting devices in the material plate (l), the strip (4) of the first group and the strip (5) of the second group to the Place the superposition of the strips and duroh at least one adjustable electrically conductive connection device, those in electrical contact with at least one strip of the first group and at least one Strips of the second group can be brought to the point where these stripes overlap. 3 · switchboard according to claim 1 or 2, characterized in that the strips of each group alternate are arranged on one surface of the sheet of material and perpendicular to the strips of the other group, whereby an effectively intertwined structural relationship is established between the first and second groups, and that the strips have a plurality of electrically bridgeable interruptions to selected parts of the Controllable electrical insulation of strips. 509812/056 7 ORIGINAL BATHROOM Le e rs e ite