GB148632A - Improvements in transmitters for telephony - Google Patents
Improvements in transmitters for telephonyInfo
- Publication number
- GB148632A GB148632A GB1053219A GB1053219A GB148632A GB 148632 A GB148632 A GB 148632A GB 1053219 A GB1053219 A GB 1053219A GB 1053219 A GB1053219 A GB 1053219A GB 148632 A GB148632 A GB 148632A
- Authority
- GB
- United Kingdom
- Prior art keywords
- currents
- oscillations
- generator
- speech
- rectifier
- 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
- H03C1/62—Modulators in which amplitude of carrier component in output is dependent upon strength of modulating signal, e.g. no carrier output when no modulating signal is present
Landscapes
- Transmitters (AREA)
Abstract
148,632. Round, H. J. April 28, 1919. Wireless telephony; thermionic relays. - In systems in which oscillations produced by a thermionic generator are modulated in accordance with speech currents, the direct current in the plate circuit of the generator is supplied by the rectification of part of the alternating speech currents. The production of oscillations, therefore, starts and stops with the speaking voice. In the arrangement shown in Fig. 1, the microphone circuit includes the primaries of two transformers T1, T2. The currents in the secondary of the transformer T1 act through a rectifier R to charge a large capacity C in the plate circuit of the generator V, while the currents in the secondary of the transformer T2 vary the amplitude of the oscillations generated. In the modification shown in Fig. 2, a second rectifier R1 is bridged across the condenser C to accelerate its discharge when speech ceases, and the modulated oscillations are magnified by an amplifier V2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1053219A GB148632A (en) | 1919-04-28 | 1919-04-28 | Improvements in transmitters for telephony |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1053219A GB148632A (en) | 1919-04-28 | 1919-04-28 | Improvements in transmitters for telephony |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB148632A true GB148632A (en) | 1920-07-28 |
Family
ID=9969552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1053219A Expired GB148632A (en) | 1919-04-28 | 1919-04-28 | Improvements in transmitters for telephony |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB148632A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6774184B2 (en) | 1997-03-13 | 2004-08-10 | Acushnet Company | Golf balls comprising blends of polyamides and ionomers |
-
1919
- 1919-04-28 GB GB1053219A patent/GB148632A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6774184B2 (en) | 1997-03-13 | 2004-08-10 | Acushnet Company | Golf balls comprising blends of polyamides and ionomers |
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