GB602007A - Improvements in variable inductance - Google Patents
Improvements in variable inductanceInfo
- Publication number
- GB602007A GB602007A GB19791/45A GB1979145A GB602007A GB 602007 A GB602007 A GB 602007A GB 19791/45 A GB19791/45 A GB 19791/45A GB 1979145 A GB1979145 A GB 1979145A GB 602007 A GB602007 A GB 602007A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- core
- inductance
- insulating material
- parts
- 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
- 239000011810 insulating material Substances 0.000 abstract 3
- 229910001369 Brass Inorganic materials 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229920002160 Celluloid Polymers 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- -1 and the other 3 of Substances 0.000 abstract 1
- 239000010951 brass Substances 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000010445 mica Substances 0.000 abstract 1
- 229910052618 mica group Inorganic materials 0.000 abstract 1
- 230000035699 permeability Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
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
- H01F17/045—Fixed inductances of the signal type with magnetic core with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
602,007. Inductances. DUMONT LABORATORIES, Inc., A. B. Aug. 1, 1945, No. 19791. Convention date, Aug. 22, 1944. [Class 38 (ii)] A variable inductance comprises a coil which may be moved relative to a core consisting of joined, cylindrical, coaxial portions of different magnetic permeability in which rigid studs are embedded to form supports for the inductance. A coil 7 is wound on a former 6 which may be made by winding a strip of impregnated paper and enclosed in a cylinder 8 of thin insulating material such as celluloid or mica. A core which is a tight sliding fit in former 6 is in two parts, one 4 of powdered magnetic material, and the other 3 of,insulating material. Copper or other non-magnetic metal rods 1, 2 are embedded at one end in parts 3, 4 respectively to form supports for the core and terminals for the coil 7 the ends of which are connected to the rods by flexible leads 10, 12. A strip 15 of insulating material is laid round the coil and has its 'ends joined together to form a tab 16 bv which coil 7 can be moved from one end of the composite core to the other to vary the inductance. A brass disc may be fixed to the outer end of core part 3 to reduce the minimum inductance value, Figs. 4 and 5 (not shown). Coil 7 may be of shorter length but of greater diameter. Fig. 3 (not shown). The non- magnetic part of the core may be made conducting, for example, of powdered carbon in an insulating shell, and the two adhering parts of the core may be connected in series or parallel with the coil 7, Fig. 5 (not shown). Specification 572,220 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US602007XA | 1944-08-22 | 1944-08-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB602007A true GB602007A (en) | 1948-05-18 |
Family
ID=22028000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19791/45A Expired GB602007A (en) | 1944-08-22 | 1945-08-01 | Improvements in variable inductance |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB602007A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2269408A4 (en) * | 2008-03-05 | 2018-01-24 | Qualcomm Incorporated | Packaging and details of a wireless power device |
-
1945
- 1945-08-01 GB GB19791/45A patent/GB602007A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2269408A4 (en) * | 2008-03-05 | 2018-01-24 | Qualcomm Incorporated | Packaging and details of a wireless power device |
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