GB131561A - - Google Patents
Info
- Publication number
- GB131561A GB131561A GB131561DA GB131561A GB 131561 A GB131561 A GB 131561A GB 131561D A GB131561D A GB 131561DA GB 131561 A GB131561 A GB 131561A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- signalling
- cut
- key
- arc
- 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.)
- Active
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)
- Arc-Extinguishing Devices That Are Switches (AREA)
- Transmitters (AREA)
Abstract
131,561. Jackson, W. J. Mellersh-, (Taylor, A.). April 8, 1919. Wireless telegraphy. - In methods of wirel e s s signalling where the radiofrequency is varied by causing the signalling-key to cut in or out part of the aerial inductance, arcing at the contacts is minimized b y dividing the spark over a number of contacts, the arrangement being such that the energy to be handled at each contact is independent of the others, regardless of whether the contacts all open simultaneously or not. The Figure shows a solenoid-actuated switch, which is controlled bv the signalling key through the winding 31. The contacts 15, 25; 16, 26 &c. when opened, cut in sections of the inductance 8<a> independently, owing to the manner in which they are connected up by the conductors 12, 13, 14 and 21, 22. The apparatus is particularly applicable to Poulsen-arc installations, the arc being represented at 3 and the supply circuit at 4, 5.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US498602XA | 1916-03-27 | 1916-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB131561A true GB131561A (en) |
Family
ID=8905030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB131561D Active GB131561A (en) | 1916-03-27 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR498602A (en) |
| GB (1) | GB131561A (en) |
-
0
- GB GB131561D patent/GB131561A/en active Active
-
1919
- 1919-04-24 FR FR498602A patent/FR498602A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR498602A (en) | 1920-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB530971A (en) | Improvements in and relating to multibreak gas blast circuit breakers | |
| GB394740A (en) | Improvements in or relating to electric circuit breakers having arc-rupturing devices | |
| US2208399A (en) | Electric switch | |
| GB131561A (en) | ||
| US2242905A (en) | Circuit interrupter | |
| US1751205A (en) | Electromagnetic blow-out device | |
| US1829836A (en) | Signaling system | |
| US1796160A (en) | Circuit interrupter | |
| GB834018A (en) | An electric circuit breaker with a metal quenching chamber | |
| US1344052A (en) | Radiotelegraphy | |
| GB398207A (en) | Improvements in or relating to electric alternating current circuit breakers | |
| US2286842A (en) | Inverter circuit | |
| US1212300A (en) | Combined cut-out and lightning-arrester for telephone systems. | |
| US806950A (en) | Selective system for party-line telephones. | |
| US662785A (en) | Apparatus for rupturing high-potential eletrical circuits without dangerous arcing. | |
| GB190209815A (en) | Improvements in and connected with the Prevention or Minimizing of Sparking on the Interruption of Ethereal Telegraphic and other Electric Circuits. | |
| US749200A (en) | High-potential switch | |
| US1596417A (en) | Circuit interrupter | |
| US918208A (en) | Transmitting apparatus. | |
| GB530338A (en) | Improvements relating to gas blast electric circuit breakers | |
| GB170745A (en) | Improvements in and relating to electric switch devices | |
| US1061717A (en) | Arrangement for producing electrical oscillations. | |
| US1350695A (en) | Radiotelegraphy | |
| GB216474A (en) | Improvements relating to magnetic blow-out devices for electric circuit interruptersand the like | |
| US1741218A (en) | Carrier-current system |