GB429454A - Method of modulating short and ultra-short waves for wireless signalling and the like - Google Patents
Method of modulating short and ultra-short waves for wireless signalling and the likeInfo
- Publication number
- GB429454A GB429454A GB23360/34A GB2336034A GB429454A GB 429454 A GB429454 A GB 429454A GB 23360/34 A GB23360/34 A GB 23360/34A GB 2336034 A GB2336034 A GB 2336034A GB 429454 A GB429454 A GB 429454A
- Authority
- GB
- United Kingdom
- Prior art keywords
- short
- waves
- ultra
- aug
- varied
- 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
- H03C7/00—Modulating electromagnetic waves
- H03C7/02—Modulating electromagnetic waves in transmission lines, waveguides, cavity resonators or radiation fields of antennas
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Color Printing (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
429,454. Microphones. ESAU, A., 15, Wilhelm Stadestrasse, and PFETSCHER, 0., 5A, Burgweg, both in Jena, Germany. Aug. 13, 1934, No. 23360. Convention date, Aug. 11, 1933. [Class 40 (iv)] [See also Group XL] Short radio waves are modulated by a microphone forming a leakage path across a high - frequency circuit such as a pair of Lecher wires. In Fig. 1, the Lecher wires 1, 2 have carbon rods 3, 4 inserted at a voltage anti-node which are bridged by a carbon lead 5 laid on them, the contact pressure being varied by impinging sound waves. Granules may be provided at the contact points. In Fig. 2, a transverse metal band 6 is slightly spaced from the Lecher wires 1, 2 the shunt capacity thus formed being varied by sound waves.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE429454X | 1933-08-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB429454A true GB429454A (en) | 1935-05-30 |
Family
ID=6477610
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23360/34A Expired GB429454A (en) | 1933-08-11 | 1934-08-13 | Method of modulating short and ultra-short waves for wireless signalling and the like |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE404628A (en) |
FR (1) | FR777100A (en) |
GB (1) | GB429454A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE932621C (en) * | 1936-10-11 | 1955-09-05 | Max Baermann | Magnetic holding device with a permanent magnet and soft iron pole pieces |
-
0
- BE BE404628D patent/BE404628A/xx unknown
-
1934
- 1934-08-10 FR FR777100D patent/FR777100A/en not_active Expired
- 1934-08-13 GB GB23360/34A patent/GB429454A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE932621C (en) * | 1936-10-11 | 1955-09-05 | Max Baermann | Magnetic holding device with a permanent magnet and soft iron pole pieces |
Also Published As
Publication number | Publication date |
---|---|
FR777100A (en) | 1935-02-11 |
BE404628A (en) |
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