DE967047C - Coil with a sintered adjustment core, in particular a sintered ferrite core, which is longitudinally displaceable in its bore by screwing - Google Patents
Coil with a sintered adjustment core, in particular a sintered ferrite core, which is longitudinally displaceable in its bore by screwingInfo
- Publication number
- DE967047C DE967047C DEK9270A DEK0009270A DE967047C DE 967047 C DE967047 C DE 967047C DE K9270 A DEK9270 A DE K9270A DE K0009270 A DEK0009270 A DE K0009270A DE 967047 C DE967047 C DE 967047C
- Authority
- DE
- Germany
- Prior art keywords
- core
- bore
- sintered
- coil
- adjustment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F21/00—Variable inductances or transformers of the signal type
- H01F21/02—Variable inductances or transformers of the signal type continuously variable, e.g. variometers
- H01F21/06—Variable inductances or transformers of the signal type continuously variable, e.g. variometers by movement of core or part of core relative to the windings as a whole
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
Description
Spule mit in ihrer Bohrung durch Schraubbewegung längsverschieblichem gesintertem Abgleichkern, insbesondere gesintertem Ferritkern Für den. Abgleich der Spulen der Nachrichtentechnik haben sich Ausführungsformen durchgesetzt., bei denen der zum Abgleich in der Spule lä.ngsverschiiebliche Massekern durch Schraubbewegung in dem Spulenträger eingestellt wird. Mit der Einführung der kompakt gesinterten Ferritkerne ist es herstellungstechnisch schwierig ge- worden, solche Kerne beim Formen des Ke:rnpreßlings mit Gewindegängen zu versehen, damit sie in der gleichen weise wie Eisenpulvermassekernefür den Schraubabgleich von Spulen verwendet werden können. Für die weitgehende Ausnutzung der guten physikalischen werte und physikalischen Eigenschaften des hochpermeablen Ferritmaterials bei Spulenabgleichkernen ist es besonders vorteilhaft, die Kerne an ihrem Außenmantel nicht mit Gewinde od. dgl. zu versehen, sondern dafür zu sorgen, daß der Abstand zwischen Spulenbohrung und Kernaußendurchmesser möglichst gering ist. Dieser Forderung kann, günstig durch die Verwendung von Spulenabgleichkernen mit glatter zylindrischer Oberfläche entsprochen werden, wie es z. B. bei Rohrkernen der Fall ist, in deren Bohrung die Mittel für die Kernlängsverschiebung eingreifen.. Bei einem solchen. Rohrkern ist in dessen Längsbohrung eine Schicht von Eisenpulvermasse und/oder Feirritpulvermasse oder Kunststoff ein, gepreßt, eingespritzt od. dgl., und es bildet diese Schicht ein Mutterngewinde, in das für die Längsverstellung des Kernes ein Gewindestift, der Bestandteil des Spulenträgers sein kann, eingreift. Beim Sintern von Rohrkernen, insbesondere solcher verhältnismäßig großer Länge, besteht die Gefahr einer ungleichmäßigen Schwundverformung des Kernes, und es können dadurch Ungleichmäßigkeiten in der Wandstärke des Rohrkernes vorhanden sein, die eine genau zentrische Führung des der Kernverstellung dienenden. Gewindestiftes in dem Gewinde der Kernbohrung aus.-schließen oder erschweren. Zur Vermeidung solcher Verwen.dun:gsnach,teile von. rohrförmigen, Abgleichkernen mit in die Kernbohrung eiingebra,ch.-tem Mutterngewinde ist erfindungsgemäß der die Führung die Kernverstellung bildende Gewindestift an seinem Tragteil derart angeordnet., daß er sich beim Schrauben dieses Stiftes in dem Rohrkern oder aus demselben in die Drehachse des Abgleichkernes einstellt. Dadurch werden Klemmungen beim Drehen des Abgleichl<ernps gegenüber dem feststehenden Stift oder beim Drehen des Stiftes zur Längsverschiebung des geigen Verdrehen gesicherten Kernes zwischen dem Spulenträger und dem Abgleichkern vermieden. Auch bei der Verwendung von Kernen mit verhältnismäßig großem Kerndurchmesser ist es durch; die erfindungsgemäße Anordnung des Gewindestiftes od. dgl. günstig möglich, eiirre gleichmäßige gleitende Führung des Kernes bei seiner VeTstellung in der Bohrung des Spulenträgers zu erreichen;, was einer weitgehenden Verminderung des Abstandes zwischen dem Kern und dem Spuleninneaidurchmesser gleichkommt.Coil with a sintered adjustment core, in particular a sintered ferrite core, which is longitudinally displaceable in its bore by means of a screwing movement. Alignment of the coils in communications technology, embodiments have prevailed in which the longitudinally displaceable mass core in the coil for alignment is set by a screwing movement in the coil carrier. With the introduction of compact sintered ferrite cores it has been manufacturing point overall difficult such nuclei in molding the Ke: to provide rnpreßlings with threads so that they can be used in the same way as the Eisenpulvermassekernefür Schraubabgleich of coils. For the extensive use of the good physical values and physical properties of the highly permeable ferrite material in coil balancing cores, it is particularly advantageous not to provide the cores with a thread or the like on their outer jacket, but to ensure that the distance between the coil bore and the outer diameter of the core is as small as possible is. This requirement can be met favorably through the use of coil balancing cores with a smooth cylindrical surface, as it is, for. B. is the case with tube cores in the bore of which the means for the longitudinal displacement of the core intervene .. In such a case. The tube core has a layer of iron powder mass and / or iron powder mass or plastic in its longitudinal bore, pressed, injected or the like, and this layer forms a nut thread into which a threaded pin, which can be part of the bobbin for the longitudinal adjustment of the core intervenes. When sintering tube cores, especially those of relatively great length, there is a risk of uneven shrinkage deformation of the core, and this can result in unevenness in the wall thickness of the tube core, which is used to guide the core adjustment precisely centered. Set screw in the thread of the core drill hole.-exclude or make it more difficult. To avoid such use: gs nach, parts of. According to the invention, the threaded pin forming the guide for the core adjustment is arranged on its support part in such a way that it adjusts itself into the axis of rotation of the calibration core when this pin is screwed into the pipe core or from the same. This avoids jamming between the coil carrier and the balancing core when turning the adjustment lobe against the stationary pin or when turning the pin for longitudinal displacement of the fiddle-locked core. Even when using cores with a relatively large core diameter, it is through; the inventive arrangement of the threaded pin od. The like. Favorably possible to achieve eiirre even sliding guidance of the core when it is positioned in the bore of the bobbin;
Die einstellbare Anordnung des Gewindestiftes für die schra,ubbare Längsverstellung des Kernes in der Bohrung eines Spulenkörpers kann z. B. dar durch erreicht werden, daß der Gewindestift kalottena.rtig mit seiner Trägerunterlage verbunden wird.The adjustable arrangement of the threaded pin for the screwable Longitudinal adjustment of the core in the bore of a bobbin can, for. B. dar by be achieved that the threaded pin kalottena.rtig with its support base connected.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK9270A DE967047C (en) | 1951-03-10 | 1951-03-10 | Coil with a sintered adjustment core, in particular a sintered ferrite core, which is longitudinally displaceable in its bore by screwing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK9270A DE967047C (en) | 1951-03-10 | 1951-03-10 | Coil with a sintered adjustment core, in particular a sintered ferrite core, which is longitudinally displaceable in its bore by screwing |
Publications (1)
Publication Number | Publication Date |
---|---|
DE967047C true DE967047C (en) | 1957-09-26 |
Family
ID=7212339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK9270A Expired DE967047C (en) | 1951-03-10 | 1951-03-10 | Coil with a sintered adjustment core, in particular a sintered ferrite core, which is longitudinally displaceable in its bore by screwing |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE967047C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE976656C (en) * | 1951-07-21 | 1964-01-30 | Siemens Ag | High-frequency core, preferably made of ferrite, with adjustment core adjustable in a guide channel by screwing |
DE1283386B (en) * | 1962-04-20 | 1968-11-21 | Illinois Tool Works | Coil with tuning core and control rod |
US9864941B2 (en) | 2015-01-16 | 2018-01-09 | Vacuumschmelze Gmbh & Co. Kg | Magnetic core, method for producing a magnetic core and method for producing an electric or electronic assembly with a magnetic core |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR769757A (en) * | 1933-03-07 | 1934-09-01 | Self-induction coils | |
US2018626A (en) * | 1934-02-02 | 1935-10-22 | Johnson Lab Inc | High-frequency inductor |
FR794081A (en) * | 1934-08-21 | 1936-02-07 | Press-molded products and their manufacturing process | |
GB502296A (en) * | 1937-04-29 | 1939-03-15 | Bosch Gmbh Robert | Improvements in or relating to high frequency inductance coils |
DE687054C (en) * | 1934-05-29 | 1940-01-22 | Preh Elektro Feinmechanik | Self-induction coil with variable inductance with a ground core that can be screwed into the coil carrier |
CH223151A (en) * | 1941-01-22 | 1942-08-31 | Lorenz C Ag | High frequency coil. |
CH228075A (en) * | 1941-04-03 | 1943-07-31 | Fides Gmbh | Electric variometer. |
US2379457A (en) * | 1942-12-30 | 1945-07-03 | Bell Telephone Labor Inc | Variable inductive device |
CH243724A (en) * | 1943-08-25 | 1946-07-31 | Philips Nv | Method for manufacturing a magnetic core with a carrier. |
US2468071A (en) * | 1946-03-30 | 1949-04-26 | Collins Radio Co | Tuning apparatus with straight-line characteristic curve |
-
1951
- 1951-03-10 DE DEK9270A patent/DE967047C/en not_active Expired
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR769757A (en) * | 1933-03-07 | 1934-09-01 | Self-induction coils | |
US2018626A (en) * | 1934-02-02 | 1935-10-22 | Johnson Lab Inc | High-frequency inductor |
DE687054C (en) * | 1934-05-29 | 1940-01-22 | Preh Elektro Feinmechanik | Self-induction coil with variable inductance with a ground core that can be screwed into the coil carrier |
FR794081A (en) * | 1934-08-21 | 1936-02-07 | Press-molded products and their manufacturing process | |
GB502296A (en) * | 1937-04-29 | 1939-03-15 | Bosch Gmbh Robert | Improvements in or relating to high frequency inductance coils |
CH223151A (en) * | 1941-01-22 | 1942-08-31 | Lorenz C Ag | High frequency coil. |
CH228075A (en) * | 1941-04-03 | 1943-07-31 | Fides Gmbh | Electric variometer. |
US2379457A (en) * | 1942-12-30 | 1945-07-03 | Bell Telephone Labor Inc | Variable inductive device |
CH243724A (en) * | 1943-08-25 | 1946-07-31 | Philips Nv | Method for manufacturing a magnetic core with a carrier. |
US2468071A (en) * | 1946-03-30 | 1949-04-26 | Collins Radio Co | Tuning apparatus with straight-line characteristic curve |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE976656C (en) * | 1951-07-21 | 1964-01-30 | Siemens Ag | High-frequency core, preferably made of ferrite, with adjustment core adjustable in a guide channel by screwing |
DE1283386B (en) * | 1962-04-20 | 1968-11-21 | Illinois Tool Works | Coil with tuning core and control rod |
US9864941B2 (en) | 2015-01-16 | 2018-01-09 | Vacuumschmelze Gmbh & Co. Kg | Magnetic core, method for producing a magnetic core and method for producing an electric or electronic assembly with a magnetic core |
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