GB177267A - Improvements in wireless transmitting apparatus - Google Patents
Improvements in wireless transmitting apparatusInfo
- Publication number
- GB177267A GB177267A GB3623320A GB3623320A GB177267A GB 177267 A GB177267 A GB 177267A GB 3623320 A GB3623320 A GB 3623320A GB 3623320 A GB3623320 A GB 3623320A GB 177267 A GB177267 A GB 177267A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aerial
- switch
- coil
- short
- transmitting apparatus
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/04—Modulator circuits; Transmitter circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
177,267. Marconi's Wireless Telegraph Co., Ltd., (Davis, N. E.). Dec. 24, 1920. Keying systems and apparatus.-An oscillatory circuit of a wireless transmitter is coupled to the aerial A by two opposed coils B, C which normally produce no effect in the aerial. Signalling is effected by closing a switch E which short-circuits one of the coils C and thus permits the coil B to energize the aerial. The circuit B, C, D may be set in oscillation by a valve generator or other means. To avoid sparking the inductance of the coil C should be small, and the switch leads should be short and of low impedance. A light relay may operate the switch E.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL11936D NL11936C (en) | 1920-12-24 | ||
GB3623320A GB177267A (en) | 1920-12-24 | 1920-12-24 | Improvements in wireless transmitting apparatus |
FR541404D FR541404A (en) | 1920-12-24 | 1921-09-22 | Improvements to transmitting devices for wireless telegraphy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3623320A GB177267A (en) | 1920-12-24 | 1920-12-24 | Improvements in wireless transmitting apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB177267A true GB177267A (en) | 1922-03-24 |
Family
ID=10386203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3623320A Expired GB177267A (en) | 1920-12-24 | 1920-12-24 | Improvements in wireless transmitting apparatus |
Country Status (3)
Country | Link |
---|---|
FR (1) | FR541404A (en) |
GB (1) | GB177267A (en) |
NL (1) | NL11936C (en) |
-
0
- NL NL11936D patent/NL11936C/xx active
-
1920
- 1920-12-24 GB GB3623320A patent/GB177267A/en not_active Expired
-
1921
- 1921-09-22 FR FR541404D patent/FR541404A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL11936C (en) | |
FR541404A (en) | 1922-07-27 |
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