DE541855C

DE541855C - Pupin triangle coil set with common metal cap

Info

Publication number: DE541855C
Application number: DE1930541855D
Authority: DE
Inventors: Willy Rund
Original assignee: Siemens and Halske AG; Siemens AG
Current assignee: Siemens and Halske AG; Siemens AG
Priority date: 1930-07-31
Filing date: 1930-07-31
Publication date: 1932-07-08

Description

DEUTSCHES REICHGERMAN EMPIRE

AUSGEGEBEN AM
8.JUU1932ISSUED ON
8.JUU1932

REICHSPATENTAMTREICH PATENT OFFICE

PATENTSCHRIFTPATENT LETTERING

JV£ 541855 KLASSE 21c GRUPPEJV £ 541855 CLASS 21c GROUP

21 C¹ S 898.21 C ¹ S 898.

Siemens & Halske Akt.-Ges. in Berlin-Siemensstadt*) Pupindreispulensatz mit gemeinsamer MetallkappeSiemens & Halske Akt.-Ges. in Berlin-Siemensstadt *) Pupin rice coil set with common metal cap

Patentiert im Deutschen Reiche vom 31. Juli 1930 abPatented in the German Empire on July 31, 1930

Im allgemeinen ist es gebräuchlich, jede mit Wicklungen versehene Pupinspule mit einer Metallkappe zu umgeben. Dies hat jedoch den Nachteil einer umständlichen Fabrikation und eines großen Aufwandes an Material für die Kappen. Ein weiterer Nachteil ist der, daß wegen der häufig stark voneinander abweichenden Werte der einzelnen Spulen die Gruppierung in den seltensten Fällen so erfolgen kann, daß alle Einzelspulen verwendbar sind; man behält also stets mehr oder weniger Spulen als ungruppierbar übrig, die als Ausschuß betrachtet werden müssen. Ein weiterer· Nachteil der gebräuchlichen Einkappenspulen ist der, daß nach dem Ausgießen des äußeren Schutzkastens mit Ausgußmasse sich in den meisten Fällen die kapazitiven Kopplungen noch ändern, weil die Anschlußenden und Verbindungsleitungen, dieIn general, it is common practice to include any winding Pupin's coil surrounded by a metal cap. However, this has the disadvantage of cumbersome manufacture and a great deal of material for the caps. Another disadvantage is that because of the often strong differences deviating values of the individual coils the grouping in the rarest of cases can be done so that all individual coils can be used; so one always keeps more or fewer bobbins left as ungroupable, which must be regarded as scrap. Another disadvantage of the common single-cap spools is that after they have been poured of the outer protective box with pouring compound is in most cases the capacitive Couplings still change because the connection ends and connecting lines that

so außerhalb der Einzelkappen liegen, ihre Kapazitäten infolge der Tränkung ändern.so lie outside the individual caps, their capacities change as a result of the impregnation.

Um diese Nachteile zu vermeiden, hat man bereits vorgeschlagen, anstatt jede einzelne Spule in eine Kappe einzuschließen, mehrere Spulen in einer Kappe unterzubringen. Hierbei ordnete man die Spulen so an, daß die beiden Spulen für die Paarsprechkreise über der Spule für den Viersprechkreis lagen, und zwar weil man glaubte, dadurch das Übersprechen zwischen den Spulen für die Paarsprechkreise und das Mitsprechen zwischen den Spulen für die Vierersprechkreise beseitigen zu können. Diese Auffassung war jedoch irrig, weil durch eine solche Anordnung der Spulen tatsächlich nur das Mitsprechen zwischen der Viererspule und der dieser benachbart liegenden Paarspule beseitigt wurde, während das Mitsprechen zwischen der Viererspule und der von ihr durch die eine Paarspule getrennten Paarspule nicht beseitigt wurde. Die An-Ordnung genügte zwar zur Erreichung einer mittleren Nebensprechfreiheit, jedoch genügt sie nicht mehr den in neuerer Zeit an die Nebensprechfreiheit gestellten Forderungen.In order to avoid these disadvantages, it has already been proposed, rather than each and every one To enclose coil in a cap, to accommodate multiple coils in a cap. Here the coils were arranged in such a way that the two coils for the pair speaking circuits are above the Coil for the four-talk circuit lay because it was believed that this caused crosstalk between the coils for the pair speaking circuits and the intercom between the coils for to be able to eliminate the quad speakers. However, this view was erroneous because through Such an arrangement of the coils actually only allows for the co-operation between the four-coil and the pair of coils adjacent to it has been eliminated while the talk between the four-coil and which was not removed from it by the pair coil separated by the pair coil. The order Although sufficient to achieve a medium crosstalk freedom, it is no longer sufficient for the more recent times Crosstalk-free claims.

Man war also bisher weder bei Verwendung einer Kappe für je eine Spule, noch bei Verwendung einer gemeinsamen Kappe für mehrere Spulen in der Lage, die erforderlichen geringen Nebensprechwerte zu erreichen. So you have not been using a cap for each coil, nor with Using a common cap for multiple coils will be able to provide the required to achieve low crosstalk values.

Sowohl das Mitsprechen zwischen der Viererspule und den beiden zugehörigen Paarspulen als auch das Übersprechen zwischen den Paarspulen wird nun vermieden, wenn man die drei in einer gemeinsamen Metallkappe liegenden und mit je einer elektrostatischen Hülle versehenen Pupinspulen gemäß der Erfindung so anordnet, daß die Spule für den Vierersprechkreis zwischen den Spulen für die Paarsprechkreise liegt und die Spulen so gegeneinander verdreht sind, daß die magnetischen Streufelder der einzelnen SpulenBoth the speaking between the four-coil and the two associated pair-coils as well as the crosstalk between the pair of coils is now avoided if you put the three in a common metal cap lying and each provided with an electrostatic shell Pupin coils arranged according to the invention so that the coil for the four-speaker circuit is between the coils for the pair-speaking circuits and the coils are twisted against each other so that the magnetic stray fields of the individual coils

*) Von dem Patentsucher ist als der Erfinder angegeben worden:*) The patent seeker stated as the inventor:

Willy Rund in Berlin-Neukölln.Willy Rund in Berlin-Neukölln.

Claims

cancel each other out. It has already been proposed to twist the coils against each other to eliminate the stray fields, but so far only in such a way that the crosstalk from pair to pair was improved, while the talking from pair to foursome was not taken into account. It has been found, however, that it is much more valuable to twist the coils against each other in such a way that the talking from pair to foursome is eliminated. The latter is achieved by twisting each pair of coils until the most favorable joint value between pair and foursome is reached, and the former by placing the four-coil between the two pair of coils and thereby increasing the distance between the pair of coils. In order to also eliminate the residual capacitive coupling between the individual coils of the coil set as completely as possible, it is advantageous to twist the connection lines within the cap in a suitable manner. A change in the favorable coupling values achieved before the spool box was poured out can be prevented by arranging the connecting wires in the space left free by the coils and filled with compound inside the cap, since they are then embedded in compound before the bobbin case is poured out so that subsequent pouring can no longer cause a change in the dielectric. A preferably trough-shaped cap which deviates from the circular cylindrical shape and which is expediently made of sheet zinc or brass is particularly suitable for accommodating the connecting lines. In the drawing, an embodiment according to the invention is shown. Fig. Ι shows a cross section and Fig. 2 shows a longitudinal section of a cap with built-in coils. It is 1 the trough-shaped cap with the side covers 2 and the top cover 3. In the cap are the coils 4 belonging to a set of four, which are supported against the cap wall by an insulating pack in the form of corrugated cardboard 5. 6 are the electrostatic shields made of metallized paper or metal foil. Bushings 7 are provided on the top cover for leading out the connecting wires. FATENTANSI-1KoCHK:

1. Pupin's throat coil set with a common metal cap, in which the individual Pupin coils are each provided with an electrostatic cover, characterized in that that the coil for the four-voice circuit between the coils for the pair-voice circuit and that the coils are twisted against each other so that the magnetic stray fields of the individual coils cancel each other out if possible.

2. coil set according to claim 1, characterized in that the common metal cap Is trough-shaped.

3. coil set according to claim 1 and 2, characterized in that the connecting lines are twisted within the cap that thereby the capacitive Residual coupling between the individual coils of the coil set is almost eliminated are.

4. coil set according to claim 1 to 3, characterized in that the coils are supported against the cap wall by corrugated cardboard, hard paper or the like.

1 sheet of drawings