DE1227151B - Electrical capacitor or similar electrical component with connecting wires - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

HOIg

German class: 21g -10/02

Number: 1227151

File number: D 34936 VIII c / 21 g

Filing date: December 13, 1960

Opened on: October 20, 1966

The invention relates to an electrical capacitor or a similar electrical component Connecting wires that each have at least one bend and with the bent free end parts for easy insertion into a perforated plate of a printed circuit in approximately the same direction from protrude from the component and each have a flattened point serving as a soldering point on the end parts.

Attaching such components to the ge ίο printed circuit having plates is usually done so that the connecting wires or the other Contact connections inserted through assigned holes in the plate and then at their free ends be soldered to the associated parts of the printed circuit. It is desirable to to keep the component at a certain distance from the mounting plate, thus reducing the risk excessive heating of the component from the solder point is avoided. A well-known one For this purpose, the component has a sheet metal cap with an integrally formed connecting tab for each connection point on, which has a terminal lug cut out of its material and bent out at a bend point has, which is opposite to the direction of the insertion in the angled position the plate serving angled and extending towards its free end tapered part. If the tapered end parts of the connecting tabs also to limit the depth of use in the associated Holes in the plate can be used, so make such sheet metal caps together with terminal lugs but are quite expensive structural parts that make the production of the electrical component considerably more expensive. In addition, it is difficult to determine the mutual spacing of the angled parallel to one another Subsequently change parts of the connecting tabs if the associated slot-shaped Holes in the mounting plate, as it often happens, make such changes necessary.

In the case of similar electrical components, it has also become known to replace the aforementioned sheet metal caps with simpler end plates which form the connecting lugs which are tapered towards their free ends. These ribbon-like connecting lugs can then also have middle prongs or the like shaped in the transverse direction, which are intended to give the connecting lug a better hold in the slot of the mounting plate. Instead of wedge-shaped tapered terminal lugs, end plates of electrical components have finally also become known, which form the end face of the component, such as an electrical capacitor or the like
electrical component with connecting wires

Applicant:

Dubilier Condenser Company (1925) Limited,

London

Representative:

Dr. W. Schalk, Dipl.-Ing. P. Wirth,

Dipl.-Ing. G. E. M. Dannenberg

and Dr. V. Schmied-Kowarzik, patent attorneys,

Frankfurt / M., Große Eschenheimer Str. 39

Named as inventor:
James Henry Cotton, London

Claimed priority:

Great Britain 14 December 1959 (42 410)

protrude in the shape of a circular disk. The distance between the component and the mounting plate results then from the difference of the assigned slot length of the receiving slot compared to the larger one Diameter of the circular disc. However, it is also disadvantageous in these constructions that the means for Keeping a distance compared to the simple common connecting wires of such components is very high turn out to be expensive.

The invention is based on the object of avoiding the aforementioned shortcomings and providing a suitable one Keeping a spacing of an electrical component mentioned at the beginning above a mounting plate to enable in a simpler way.

The object set is achieved according to the invention in that the connecting wires of one of the aforementioned Component flattened at their free ends in the sense of soldering and between their flattened areas and their connection points on the component are bent, so that the component with the free ends of the connecting wires while maintaining a certain distance from the plate can be used in this and the distance is either through webs resting on the plate, for example Z or S-shaped bent parts of the connecting wires or through a hole width at a distance from the free Ends in a cross-sectional direction exceeding width of the flattened areas is preserved.

609 707/326

Such a design of the usual connecting wires makes a waiver of any special Connection caps or connection plates possible. In addition, the storage of the components can be simplified by the fact that the connecting wires initially only receive the flattened areas, without the wires already being bent. Only for the use of the component are the Turns made in a manner appropriate to the individual case.

Refinements of the invention relate to different structural details of the invention Component.

It is already known to bend the usual connecting wires of an electrical component and to provide flattened areas in the area of their free ends. These should flatten however, only after the component has been inserted and placed on the mounting plate the side of the plate opposite the component to prevent any slipping back to prevent the connecting wires from the associated openings in the mounting plate. It is therefore a matter of a different task than the one on which the present invention is based lies.

In the drawing, the invention is illustrated by way of example, namely shows

Fig. 1 is a perspective view of an electrical Component with axially running connecting wires,

Figs. 2 and 3 show two successive stages in the conversion of the usual axially extending lead wires in spade-shaped solder connections,

4 is a perspective view of an electrical Component in which the axially extending connecting wires in spade-shaped solder connections are converted

F i g. 5 the conversion of conventional connecting wires protruding radially from the periphery of the accessory part in spade-shaped solder connections,

F i g. 6 a further step in the conversion of the usual axially extending connecting wires into spade-shaped solder connections,

F i g. 7 is a side view of an electrical component, its axially extending connecting wires are converted into another form of spade-shaped soldered connections,

F i g. 8 a further stage in the conversion of the connecting wires protruding radially from the circumference of the component in spade-shaped solder connections and

9 is a perspective view of an electrical Component, the axially extending lead wires in a further modified form of Spade-shaped solder connections are modified.

Fig. 1 shows a conventional form of a component, ie a capacitor or resistor A of cylindrical shape, the conductive part or conductive parts are connected to the connecting wires B and B ₁ , which protrude from the opposite ends of this component A axially.

In order to achieve the shape of the connecting wires according to the invention, will be B in the present case the lead wires and B ₁ practically over its entire length at the same time in a press (see Fig. F ig. 2) is flattened, the plates C and C ₁ with depressions C ₂ and C ₃ for receiving the cylindrical body of the component A are provided. The flattening of the wires B and B ₁ is done by moving the upper pressure plate C ₁ downwards, the underside of _{which is shaped on its working surfaces C 4} and C ₅ so that the wires close to their ends connected to the body of the component, ie about at B ₂ and B ₃ , more widened or flattened than at their free ends, namely about 2? ₄ and B ₅ . Then a bending tool (shown in FIG. 3) is provided with a recess

ίο Lower part D for receiving the body of the component and a movable upper TeUD ₁ of inverted U-shape, which engages the flattened wires B and B ₁ , used to attach each wire at a point, again approximately at B ₂ and B ₃ , in

a small distance from the body of the component ^ bend.

Each of the wires B and B ₁ is bent by such a bending tool about an axis that is perpendicular to the axis of the component and parallel to

ao runs the plane in which it was flattened, so that, as is clear from FIG. 4 it can be seen that the flattened parts S ₆ and B _{1 of} the wires form two soldering clips which protrude radially in the longitudinal direction from the component A and whose flattened surfaces run in parallel planes perpendicular to the axis of the component A.

The component produced in this way can easily be attached to the perforated board or board of a printed circuit, in which parallel slots or openings are appropriately spaced to receive the soldering terminals which are then electrically connected to the printed circuit by soldering. Each lead wire B and B ₁ is widened so that the width of the slot in the panel is equal to that of the tapered terminal portion B ₆ or B ₇ at a point a quarter or a third of the length of such tapered terminal portion from the free end. This limits the insertion of the soldering clips into the slots in the board so that the component is spaced from the board. In this way, the solder terminals can be soldered to the printed circuit without the risk of damaging the component. Such a distance from the plate is also advantageous because it allows free air circulation when the component develops heat during use.

The invention can also be used with cylindrical electrical components with connections extending radially to the circumference, in which case the connecting wires only have to be flattened. F i g. 5 shows such a component Zs with radially extending connecting wires F and F ₁ , a press with a stationary pressure plate G and two movable plates G ₁ and G ₂ with profiled work surfaces G ₃ and G _{4 being} used to connect the connecting wires F and F ₁ to be flattened in each case to a spade shape.

In some cases it may happen that the solder terminals formed in the manner described above do not exactly correspond in their spacing from one another to the spacing between the slot-shaped perforations of the board with the printed circuit. In this case, for example again in the case of a cylindrical component ^ which is initially provided at both ends with axially extending connections B and B ₁ , the

Connecting wires B and B ₁ initially in the above with reference to FIG. 2 flattened manner described; Then the component ^ is inserted into a bending tool (see Fig. 6), the pressure plates H and H ₁ , which are stepped at their bending causing areas, so that in each flattened connecting wire B and B ₁ An approximately Z-shaped bend (roughly as in B ₈ and S ₉ ) occurs when the bending tool is actuated.

The bends of the wires B and B ₁ take place about axes which are perpendicular to the axis of the electrical component A and at the same time parallel to the plane in which the wires B and B _{1 are} flattened. The two Z-shaped profiles B _s and B ₉ produced in this way in each wire B and B ₁ are bent by 90 ° at each bend.

Then by means of a simple, in FIG. 3 bending tool shown, the connecting wires B and B ₁ each bent at a point B ₂ and B ₃ (see Fig. 7) near the component A so that they protrude from it in approximately the same direction, the bending tool so arranged is that it does not destroy the Z-shaped bends B ₈ and B _{9 previously made.} The Z-shaped bends B ₈ and B _{9 of} the flattened wires B and B ₁ taper, as shown, the distance between the soldering terminals B ₆ and B ₇ compared to the distance between those soldering terminals which have no Z-shaped bends in the wire. An increase in the distance can also be achieved in an analogous manner. The bending tool for making the Z-shaped bends B ₃ and B ₉ is designed so that it attaches each of the bent TeUeB ₈ or B ₉ in such a direction and at such a point of the wire B or B ₁ that the final distance between the Soldering terminals B ₆ and B ₇ correspond exactly to the spacing of the openings in the printed circuit board. It can be seen that the central parts of the Z-shaped bent legs B ₈ and B _{9 of} the clamps each form a seat which rests against the surface of the perforated plate and thereby holds the component A at a distance from this plate; it is therefore not essential in this case to give the flattened connecting wires a tapered shape, although such a taper is shown in FIG. 7 and facilitates the insertion of the soldering clips B ₆ and B ₇ into the openings in the printed circuit board.

Of course, a bending tool of a different shape can also be used to produce approximately Z-shaped bends in flattened connecting wires, the ends of which are connected to a cylindrical component and project radially therefrom. Thus, FIG. 8 for this purpose a bending tool with two stationary pressure plates / and Z ₁ and two movable pressure plates J ₂ and 7 ₃ , which produce Z-shaped profiles F ₂ and F ₃ on the connecting wires F and F ₁ protruding radially from a component E.

Sometimes it is advisable, as shown in FIG. 9 is shown to rotate the soldering terminals B ₆ and B _{7 in} each case by a right angle so that their

flattened surfaces parallel to the axis of the component ^ so that these terminals B ₆ and B ₇ can be inserted into aligned slots in the printed circuit board.

If the soldering terminals are provided with Z-shaped profiles B ₈ and B ₉ (as in the case shown), the rotation is expedient in the area B ₂ and B ₃ of each wire B or B ₁ , which is adjacent to component A, performed so that the

ίο middle part of each of the Z-shaped profiles B ₈ and B _{9 is} also rotated by 90 °, in such a way that it is perpendicular to the axis of the component towards the side. This makes it possible to mount the component A offset to one side of the slotted holes of the plate, as is sometimes necessary when two or more components are mounted close to one another.

Claims (3)

Patent claims: 1. Electrical capacitor or similar electrical component with connecting wires that each have at least one bend and protrude with the bent free end parts for easy insertion into a perforated plate of a printed circuit in approximately the same direction from the component and one serving as a soldering point on the end parts have flattened point, characterized in that the connecting wires (B, B ₁ or F ₁ F ₁ ) are flattened at their free ends in the sense of the soldering point formation and between their flattened areas (B ₆ , B ₇ ) and their connection points on the component (A or . E) are bent so that the component with the free ends of the connecting wires can be inserted into the plate while maintaining a certain distance from the plate, and the distance is either achieved by webs (B ₈ , B ₉ or F ₂ , F ₃ ) approximately Z- or S-shaped bent parts of the connecting wires or through a hole width at a distance from the free wire ends in a Width of the flattened areas (B ₆ , B ₇ ) exceeding the cross-sectional direction is preserved. 2. Capacitor according to claim 1, characterized in that the free ends of the connecting wires (B ₁ B ₁ or F, F ₁ ) are flattened in the shape of a spade with the width increasing from the free end and finally exceeding the associated hole width. 3. Capacitor according to claim 1 or 2, characterized in that each connecting wire (B or B ₁ ) lying between the approximately Z- or S-shaped bent part (B ₈ or B ₉ ) and the component (A) Area is rotated by 90 °. Considered publications:
German Patent No. 913,938;
German Auslegeschrift No. 1054 517;
German utility model No. 1767 456;
U.S. Patent No. 2,791,772. 1 sheet of drawings