GB254203A - Improvements in or relating to solenoids or inductance coils - Google Patents
Improvements in or relating to solenoids or inductance coilsInfo
- Publication number
- GB254203A GB254203A GB3276325A GB3276325A GB254203A GB 254203 A GB254203 A GB 254203A GB 3276325 A GB3276325 A GB 3276325A GB 3276325 A GB3276325 A GB 3276325A GB 254203 A GB254203 A GB 254203A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- spindle
- tappings
- wound
- knob
- 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)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
254,203. Appleton, W. A., and Joseph, J. Dec. 28, 1925. Wireless tuning-apparatus, adjustment devices for; inductances. - A variable inductance comprises in combination, a solenoid wound on the " figure of eight " principle and provided with tappings connected to a switch forming part of the solenoid unit, and a second " figure of eight " coil adjustably mounted in relation to the first coil. In one construction, Fig. 1, a main coil 13 is wound on rods 12 between end plates 10, 11 and a smaller coil 14 is wound between plates 15, 16. The coil 14 is mounted on a spindle 19 carrying an operating-knob 20 the spindle 19 passing through a spindle 21 and knob 22. The spindle 21 carries a switch arm 24 engaging contacts 25 connected with tappings from the main coil, the tappings and switch arm being arranged to avoid " dead end " effects. In a modification, Fig. 4, the coil 14 is adjusted by friction gear 40, 41, a pivoted plate 44 and spring 46 being provided to exert pressure between the gear surfaces. Specifications 12978/11 and 224,976 are referred to. Reference has been directed by the Comp- .troller to Specification 257,364.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3276325A GB254203A (en) | 1925-12-28 | 1925-12-28 | Improvements in or relating to solenoids or inductance coils |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3276325A GB254203A (en) | 1925-12-28 | 1925-12-28 | Improvements in or relating to solenoids or inductance coils |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB254203A true GB254203A (en) | 1926-07-01 |
Family
ID=10343630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3276325A Expired GB254203A (en) | 1925-12-28 | 1925-12-28 | Improvements in or relating to solenoids or inductance coils |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB254203A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0118269A1 (en) * | 1983-02-28 | 1984-09-12 | CODMAN & SHURTLEFF INC. | Electrical transformer |
-
1925
- 1925-12-28 GB GB3276325A patent/GB254203A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0118269A1 (en) * | 1983-02-28 | 1984-09-12 | CODMAN & SHURTLEFF INC. | Electrical transformer |
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