GB359094A - Improvements in or relating to inductance coils and/or transformers - Google Patents
Improvements in or relating to inductance coils and/or transformersInfo
- Publication number
- GB359094A GB359094A GB2384530A GB2384530A GB359094A GB 359094 A GB359094 A GB 359094A GB 2384530 A GB2384530 A GB 2384530A GB 2384530 A GB2384530 A GB 2384530A GB 359094 A GB359094 A GB 359094A
- Authority
- GB
- United Kingdom
- Prior art keywords
- windings
- primary
- inductance value
- secondary windings
- shunted
- 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
- H01F21/12—Variable inductances or transformers of the signal type discontinuously variable, e.g. tapped
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Details Of Aerials (AREA)
Abstract
359,094. Transformers. LONDON ELECTRIC WIRE CO. & SMITHS, Ltd. and BOYD, W. F., 7, Playhouse Yard, Golden Lane, London. Aug. 8, 1930, No. 23845. [Class 38 (ii).] In transformer units for wireless receiving apparatus of the type in which, when changing to a lower wavelength band, the primary and secondary windings of high inductance value are shunted by primary and secondary windings of low inductance value by means of a switch, the windings are carried by formers within a screen casing which also contains the switch mechanism operated from the exterior. An inductance coil unit, and transformer unit contained in compartments 4, 5 respectively, Fig. 3, formed by a metallic partition 6 in a metal box 2. Switches S .. S4 are closed by cams 16 mounted on a spindle 15, and rotated by a knob 17 which may be attached to either end of the spindle. The amount of rotation is limited by stops 20. The ends of the windings are connected to eyelets attached to the formers, the eyelets having lugs 9 passed through the base, and bent over at 10 to allow for soldering connections. When the switches S3, S4, Fig. 2, are closed the primary and secondary windings L4, L5 respectively, which are of high inductance value, are shunted by primary and secondary windings L6, L7 of low inductance value, a reaction coil L2 being used with one or the other of the sets of windings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2384530A GB359094A (en) | 1930-08-08 | 1930-08-08 | Improvements in or relating to inductance coils and/or transformers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2384530A GB359094A (en) | 1930-08-08 | 1930-08-08 | Improvements in or relating to inductance coils and/or transformers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB359094A true GB359094A (en) | 1931-10-22 |
Family
ID=10202234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2384530A Expired GB359094A (en) | 1930-08-08 | 1930-08-08 | Improvements in or relating to inductance coils and/or transformers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB359094A (en) |
-
1930
- 1930-08-08 GB GB2384530A patent/GB359094A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB359094A (en) | Improvements in or relating to inductance coils and/or transformers | |
| GB382076A (en) | Improvements in electrical circuit-tuning devices | |
| GB499010A (en) | Improvements in and relating to electric transformers | |
| GB444608A (en) | Improvements in high frequency coupling coils | |
| GB430672A (en) | Improvements in wireless tuning inductances | |
| GB358862A (en) | Improvements in or relating to intermediate frequency transformers for wireless reception | |
| GB254568A (en) | Arrangement for the adjustable magnetic short-circuiting of self-induction elements and transformers in wireless receiving stations | |
| GB417378A (en) | Improvements in inductance coils | |
| GB251025A (en) | Improvements in variable coupling devices for alternating current coils | |
| GB522994A (en) | Improvements in permeability tuner | |
| GB269550A (en) | Improvements in induction-coils for wireless apparatus | |
| GB260359A (en) | Improved means for controllably damping an oscillating circuit | |
| GB401782A (en) | Improvements in means for preventing disturbances in wireless apparatus using rotaryconverters | |
| GB322814A (en) | Improvements in and relating to thermionic amplifiers | |
| GB393003A (en) | Improvements in electrical chokes | |
| GB495486A (en) | Improvements in or relating to electric transformers | |
| GB245898A (en) | Improvements in and relating to transformers and choking coils, especially for use in radio communication | |
| GB375171A (en) | Improvements relating to ignition coils | |
| GB239267A (en) | Improvements in and relating to tuning or inductance coil units for high frequency circuits for use in wireless receiving apparatus | |
| GB529807A (en) | Improvements in stray-field transformers | |
| GB235709A (en) | Improvements in electro-therapeutic apparatus | |
| GB468364A (en) | Improvements in and relating to high frequency iron core transformers | |
| GB592031A (en) | Electric coupling circuit | |
| GB396022A (en) | High-frequency transformer | |
| FR775760A (en) | Magnetic circuit for transformers, inductance coils and similar devices |