GB516841A - Improvements relating to electric signalling systems - Google Patents
Improvements relating to electric signalling systemsInfo
- Publication number
- GB516841A GB516841A GB2207638A GB2207638A GB516841A GB 516841 A GB516841 A GB 516841A GB 2207638 A GB2207638 A GB 2207638A GB 2207638 A GB2207638 A GB 2207638A GB 516841 A GB516841 A GB 516841A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamps
- shunt
- signalling systems
- discharge
- impulses
- 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
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
- H04Q9/04—Arrangements for synchronous operation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
516,841. Electric signalling systems. EVERSHED & VIGNOLES, Ltd., and MARCHMENT, W. T. July 25, 1938, No. 22076. Drawings to Specification. [Class 40 (i)] In a system having a receiver operated in step with the transmitter and comprising a number of neon or other luminous discharge lamps responding to transmitted impulses, the lamps are associated with local circuits whereby any particular lamp is maintained in a continuous luminous state as long as it is receiving impulses. The invention is described with reference to one of the synchronous distributer systems described in Specification 510,551, each neon lamp when receiving impulses being maintained in continuous discharge by the discharge of the condenser of a resistance or inductancecondenser shunt having a suitable time constant. The shunt circuit may be fed with an auxiliary voltage substantially less than the striking voltage of the lamps. In the system described each half-cycle of the A.C. supply which also drives the distributers is available for use as an impulse, and the shunt circuits are directly fed by a common transformer, but the invention is .also applicable to D.C. signalling systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2207638A GB516841A (en) | 1938-07-25 | 1938-07-25 | Improvements relating to electric signalling systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2207638A GB516841A (en) | 1938-07-25 | 1938-07-25 | Improvements relating to electric signalling systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB516841A true GB516841A (en) | 1940-01-12 |
Family
ID=10173527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2207638A Expired GB516841A (en) | 1938-07-25 | 1938-07-25 | Improvements relating to electric signalling systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB516841A (en) |
-
1938
- 1938-07-25 GB GB2207638A patent/GB516841A/en not_active Expired
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