GB448927A - Improvements relating to the control of alternating currents - Google Patents
Improvements relating to the control of alternating currentsInfo
- Publication number
- GB448927A GB448927A GB2964534A GB2964534A GB448927A GB 448927 A GB448927 A GB 448927A GB 2964534 A GB2964534 A GB 2964534A GB 2964534 A GB2964534 A GB 2964534A GB 448927 A GB448927 A GB 448927A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bridge
- line
- diagonal
- control
- series
- 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
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/52—Modulators in which carrier or one sideband is wholly or partially suppressed
- H03C1/54—Balanced modulators, e.g. bridge type, ring type or double balanced type
- H03C1/56—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising variable two-pole elements only
- H03C1/58—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising variable two-pole elements only comprising diodes
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
448,927. Telegraph transmitters. HARRIS, L. H., 5, Phillimore Gardens, Kensal Rise, London. Oct. 17, 1934, No. 29645. [Class 40 (iii)] An alternating-current transmission line A, B, Fig. 1, is bridged by the primary 1 of a transformer, the secondary winding 2 of which is connected through a condenser 5 across the diagonal a, b of a bridge of non-linear conductors, e.g. dry-plate rectifiers, across the other diagonal c, d of which is connected a D.C. control circuit so arranged that the secondary 2 is effectively short-circuited when the point d is rendered positive relative to the point c. Thus, D.C. signals applied across the diagonal c, d key the alternating currents in the line. For double current D.C. signals a further bridge e, y may be provided so that the check meter M in the D.C. circuit may read zero. The second bridge may control in the opposite sense a transformer connected in series in the line, Fig. 3 (not shown). In another embodiment, Fig. 2, a single bridge controls in opposite senses series and parallel transformers 1<1>, 2<1> and 1, 2 respectively in the line A, B. A further embodiment, Fig. 6 (not shown), comprises a unit designed to replace a known type of keying relay, and which can be connected to a jack to be interchangeable therewith.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2964534A GB448927A (en) | 1934-10-17 | 1934-10-17 | Improvements relating to the control of alternating currents |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2964534A GB448927A (en) | 1934-10-17 | 1934-10-17 | Improvements relating to the control of alternating currents |
Publications (1)
Publication Number | Publication Date |
---|---|
GB448927A true GB448927A (en) | 1936-06-17 |
Family
ID=10294831
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2964534A Expired GB448927A (en) | 1934-10-17 | 1934-10-17 | Improvements relating to the control of alternating currents |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB448927A (en) |
-
1934
- 1934-10-17 GB GB2964534A patent/GB448927A/en not_active Expired
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