GB456586A - Improvements in or relating to variable inductances - Google Patents
Improvements in or relating to variable inductancesInfo
- Publication number
- GB456586A GB456586A GB13916/35A GB1391635A GB456586A GB 456586 A GB456586 A GB 456586A GB 13916/35 A GB13916/35 A GB 13916/35A GB 1391635 A GB1391635 A GB 1391635A GB 456586 A GB456586 A GB 456586A
- Authority
- GB
- United Kingdom
- Prior art keywords
- turns
- coil
- conductor
- contact
- contact arm
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/03—Constructional details, e.g. casings, housings
Abstract
456,586. Inductances. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London, and CRAYMER, H. J., 37, Bishops Road, Chelmsford. May 11, 1935, No. 13916. [Class 37] A variable inductance for use, for example, as anode tuning coil in a wireless transmitter comprises a double helix of tubular conductor 3, a radial contact arm 13 for effecting continuous adjustment of the length of conductor in circuit, and a plurality of contact strips 20 for short-circuiting the turns of the conductor not in circuit. The contact arm 13 is fixed to an operating shaft 6 which has rotatably mounted thereon a panshaped copper member 17 carrying radially extending guides 19 spaced at 120. Slidably extending through each guide is a flexible contact strip 20 anchored at 20a to the frame of the coil and at 20b to a spider 22 slidable on the shaft 6. Thus longitudinal movement of the shaft due to the helical path of the contact arm 13 engaging the turns of the conductor causes the strips 20 to slide through their guides and bear on the turns between the contact 13 and the end of the coil. The pan 17 acts as a screen between the active and idle turns of the coil. Cooling fluid is circulated through the turns of the coil and may pass to the anode water jacket of the transmitter valve along one helix and back along the other.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB13916/35A GB456586A (en) | 1935-05-11 | 1935-05-11 | Improvements in or relating to variable inductances |
| US76365A US2139443A (en) | 1935-05-11 | 1936-04-25 | Variable inductance |
| DEM134474D DE665634C (en) | 1935-05-11 | 1936-05-12 | Grinding variometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB13916/35A GB456586A (en) | 1935-05-11 | 1935-05-11 | Improvements in or relating to variable inductances |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB456586A true GB456586A (en) | 1936-11-11 |
Family
ID=10031714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13916/35A Expired GB456586A (en) | 1935-05-11 | 1935-05-11 | Improvements in or relating to variable inductances |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2139443A (en) |
| DE (1) | DE665634C (en) |
| GB (1) | GB456586A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE939092C (en) * | 1944-04-20 | 1956-02-16 | Elektronik Ges Mit Beschraenkt | High frequency oscillator with tunable Lecher line |
| US2910661A (en) * | 1956-04-09 | 1959-10-27 | Collins Radio Co | Variable inductor |
| US3281748A (en) * | 1964-09-11 | 1966-10-25 | Hazeltine Research Inc | Variable inductor |
| US3444494A (en) * | 1967-11-17 | 1969-05-13 | Hughes Aircraft Co | High power variable inductor |
| GB1470902A (en) * | 1975-02-28 | 1977-04-21 | Tioxide Group Ltd | Electrical series reactor |
-
1935
- 1935-05-11 GB GB13916/35A patent/GB456586A/en not_active Expired
-
1936
- 1936-04-25 US US76365A patent/US2139443A/en not_active Expired - Lifetime
- 1936-05-12 DE DEM134474D patent/DE665634C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2139443A (en) | 1938-12-06 |
| DE665634C (en) | 1938-10-01 |
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