US3090907A - Intermediate frequency transformer - Google Patents
Intermediate frequency transformer Download PDFInfo
- Publication number
- US3090907A US3090907A US28318A US2831860A US3090907A US 3090907 A US3090907 A US 3090907A US 28318 A US28318 A US 28318A US 2831860 A US2831860 A US 2831860A US 3090907 A US3090907 A US 3090907A
- Authority
- US
- United States
- Prior art keywords
- intermediate frequency
- frequency transformer
- coil
- transformer
- magnetic core
- 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 - Lifetime
Links
- 239000003990 capacitor Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/043—Fixed inductances of the signal type with magnetic core with two, usually identical or nearly identical parts enclosing completely the coil (pot cores)
Definitions
- FIG. 1 is an elevational view, partly in section, showing the internal construction of one embodiment of this invention
- FIG. 2 is a bottom view of the embodiment of PEG. 1.
- the principal structural member of the intermediate frequency transformer of this invention is a base 2 made from an electrical insulation substance such as a phenol resin on which vertical support columns 1, 1 of arcuate shape in plan view are [rigidly fixed.
- the inner arcuate surfaces or" said columns 1, 1 lie on the same circle in diametrically opposed juxtaposition and have female screw threads on their surfaces.
- a spool-shaped, high-frequency magnetic core 4 about which is wound a coil 3 is disposed centrally on the said base 2 and is covered by a high-frequency magnetic cylinder 5, which has male screw threads on its outer peripheral surface, and which is screwed EQQ in and between the support columns 1, 1 by the engagement of the aforesaid male and female screw threads.
- a shield can 6 is adapted to enclose the aforedescribed main structural members 2 and 1, 1.
- Said shield can 6 has, on its top surface, a through opening 7, through which such a tool as a screw driver can be introduced and inserted into a slot 8 provided on the top of the aforesaid magnetic cylinder 5 to turn the said magnetic cylinder 5, thereby raising or lowering it and varying the inductance of the said coil 3.
- the structure of the transformer contains a tuning capacitor 9 installed, in a space-economizing manner, in the bottom of the aforesaid base 2. This feature not only saves space, as compared with the arrangement according to the conventional art, wherein the intermediate frequency transformer and the tuning capacitor are installed separately, but also facilitates the installation of the two parts.
- an intermediate frequency transformer comprising, essentially, a spool-shaped, high-frequency magnetic core, about which is wound .a coil, and a high-frequency magnetic cylinder which covers, in the manner of a canopy, the said magnetic core, and which can be raised or lowered relative to the said magnetic core to vary the inductance of the said coil; the combination of said assembly with a tuning capacitor which is supported within the bottom of the base of said assembly.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
Description
May 21, 1963 HISAO MAEDA INTERMEDIATE FREQUENCY TRANSFORMER Filed May 11, 1960 by I I/5H0 MAEDA Ell 7 United States Patent 3,690,907 INTERMEDIATE FREQUENCY TRANSFGRlvlER Hisao Maeda, 13 hll0l-K0El, Minat'odin, 'loltyo-to, .lapan Filed May 11, 1960, Ser. No. 28,318 Claims priority, application iapan May 2:3, 1959 1 Claim. (Cl. Hit-7o} This invention relates to an intermediate-frequency transformer of improved construction for use in radio receivers of the superheterody-ne type.
It is an object of this invention to provide a new and improved intermediate frequency transformer having a built-in tuning capacitor.
It is another object of this invention to provide such an intermediate frequency transformer as stated above of simple and compact, yet strong construction.
The manner in which the foregoing as well as other objects and advantages may best be achieved will be understood more fully from a consideration of the following description of one embodiment of the invention, taken in conjunction with the accompanying drawing in which:
FIG. 1 is an elevational view, partly in section, showing the internal construction of one embodiment of this invention;
FIG. 2 is a bottom view of the embodiment of PEG. 1.
Referring to the drawing, the principal structural member of the intermediate frequency transformer of this invention is a base 2 made from an electrical insulation substance such as a phenol resin on which vertical support columns 1, 1 of arcuate shape in plan view are [rigidly fixed. The inner arcuate surfaces or" said columns 1, 1 lie on the same circle in diametrically opposed juxtaposition and have female screw threads on their surfaces. A spool-shaped, high-frequency magnetic core 4 about which is wound a coil 3 is disposed centrally on the said base 2 and is covered by a high-frequency magnetic cylinder 5, which has male screw threads on its outer peripheral surface, and which is screwed EQQ in and between the support columns 1, 1 by the engagement of the aforesaid male and female screw threads. A shield can 6 is adapted to enclose the aforedescribed main structural members 2 and 1, 1. Said shield can 6 has, on its top surface, a through opening 7, through which such a tool as a screw driver can be introduced and inserted into a slot 8 provided on the top of the aforesaid magnetic cylinder 5 to turn the said magnetic cylinder 5, thereby raising or lowering it and varying the inductance of the said coil 3.
It is a unique feature of the invention that the structure of the transformer contains a tuning capacitor 9 installed, in a space-economizing manner, in the bottom of the aforesaid base 2. This feature not only saves space, as compared with the arrangement according to the conventional art, wherein the intermediate frequency transformer and the tuning capacitor are installed separately, but also facilitates the installation of the two parts.
Since it is obvious that many changes and modifications can be made in the above described details Without departing from the nature and spirit of the invention, it is to be understood that the invention is not to be limited to the details described herein except as set forth in the appended claim.
Iclaim:
In an intermediate frequency transformer comprising, essentially, a spool-shaped, high-frequency magnetic core, about which is wound .a coil, and a high-frequency magnetic cylinder which covers, in the manner of a canopy, the said magnetic core, and which can be raised or lowered relative to the said magnetic core to vary the inductance of the said coil; the combination of said assembly with a tuning capacitor which is supported within the bottom of the base of said assembly.
References Cited in the file of this patent UNITED STATES PATENTS
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3090907X | 1959-05-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3090907A true US3090907A (en) | 1963-05-21 |
Family
ID=17988763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US28318A Expired - Lifetime US3090907A (en) | 1959-05-25 | 1960-05-11 | Intermediate frequency transformer |
Country Status (1)
Country | Link |
---|---|
US (1) | US3090907A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3409850A (en) * | 1965-10-28 | 1968-11-05 | Oshima Masaomi | Miniature inductance device for communication |
US3908264A (en) * | 1974-04-24 | 1975-09-30 | Gen Instrument Corp | Method for calibrating a resonant frequency |
US4163202A (en) * | 1977-04-15 | 1979-07-31 | Murata Manufacturing Co., Ltd. | Tuning apparatus and method of producing the same |
US4656450A (en) * | 1986-05-12 | 1987-04-07 | Northern Telecom Limited | Transformer and ferrite core structure therefor |
US6867982B2 (en) * | 2000-02-29 | 2005-03-15 | Murata Manufacturing Co., Ltd. | High frequency component and communication apparatus incorporating the same |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2483919A (en) * | 1948-05-29 | 1949-10-04 | Automatic Mfg Corp | Coil and condenser assembly |
US2547085A (en) * | 1948-05-01 | 1951-04-03 | Automatic Mfg Corp | Condenser assembly |
-
1960
- 1960-05-11 US US28318A patent/US3090907A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2547085A (en) * | 1948-05-01 | 1951-04-03 | Automatic Mfg Corp | Condenser assembly |
US2483919A (en) * | 1948-05-29 | 1949-10-04 | Automatic Mfg Corp | Coil and condenser assembly |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3409850A (en) * | 1965-10-28 | 1968-11-05 | Oshima Masaomi | Miniature inductance device for communication |
US3908264A (en) * | 1974-04-24 | 1975-09-30 | Gen Instrument Corp | Method for calibrating a resonant frequency |
US4163202A (en) * | 1977-04-15 | 1979-07-31 | Murata Manufacturing Co., Ltd. | Tuning apparatus and method of producing the same |
US4656450A (en) * | 1986-05-12 | 1987-04-07 | Northern Telecom Limited | Transformer and ferrite core structure therefor |
US6867982B2 (en) * | 2000-02-29 | 2005-03-15 | Murata Manufacturing Co., Ltd. | High frequency component and communication apparatus incorporating the same |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3090907A (en) | Intermediate frequency transformer | |
US3092796A (en) | Intermediate frequency transformer | |
US2335205A (en) | Supporting means for radio coil units and the like | |
ES197885U (en) | An elevated gain antenna particularly for radio and television receivers. (Machine-translation by Google Translate, not legally binding) | |
US2895130A (en) | Helical antenna component and adjustable mounting means therefor | |
US2598810A (en) | Wide range high-frequency tuner | |
US2881429A (en) | Indoor television antenna | |
US3593245A (en) | Double-tuned intermediate-frequency transformer | |
JPS5836075Y2 (en) | Anti-magnetic plate for electronic wristwatches | |
US3060394A (en) | Radio transformer | |
US2903694A (en) | Antenna structure | |
US3106691A (en) | Variable-inductance coil having core threaded in coil form | |
US3223953A (en) | Inductance device with movable core having resilient disc for resisting core movement | |
JPS6035220Y2 (en) | high frequency transformer | |
KR830000287Y1 (en) | Medium Frequency Transformer | |
US2885674A (en) | Adjustable antenna structure | |
US2198437A (en) | Coil and condenser assembly for high frequency purposes | |
JPH0110887Y2 (en) | ||
USD183306S (en) | Combined escutcheon and face plate for a television receiver cabinet | |
GB907200A (en) | Improvements in or relating to electrical transformers for television and similar fields | |
JPS645864Y2 (en) | ||
JPH0227539Y2 (en) | ||
US1719057A (en) | Transformer | |
JPS5843010U (en) | antenna input device | |
JPS58164343U (en) | Combination tuner antenna structure |