GB683265A - An improved carrier-frequency installation for communication between mobile and stationary stations - Google Patents
An improved carrier-frequency installation for communication between mobile and stationary stationsInfo
- Publication number
- GB683265A GB683265A GB6856/51A GB685651A GB683265A GB 683265 A GB683265 A GB 683265A GB 6856/51 A GB6856/51 A GB 6856/51A GB 685651 A GB685651 A GB 685651A GB 683265 A GB683265 A GB 683265A
- Authority
- GB
- United Kingdom
- Prior art keywords
- communication
- line
- amplifiers
- carrier
- train
- 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
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
683,265. Communication over power lines. HASLER AKT.-GES. WERKE FUR TELEPHONIE UND PRAZISIONSMECHANIK. March 22, 1951 [Dec. 6, 1950], No. 6856/51. Class 40 (iv). [Also in Group XXX] In a carrier-frequency system for communication between an electrically-driven vehicle L1 and a fixed communication network, a carrier frequency line S, E is arranged along the track and is connected to separate sections a, b, c of conductor rail or contact line F. The lines S, E terminate in a public telephone network and provide up to 30 two-way channels. The carrier frequency is transmitted as a pilot to effect volume control of the line amplifiers I-IV and echo-suppressing arrangements may be incorporated in the amplifiers H and V to block out any noise induced in conductor rails not in use. The system which is intended for public train telephone service provides full dialling facilities from the train and the provision of coin-freed apparatus is suggested.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH683265X | 1950-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB683265A true GB683265A (en) | 1952-11-26 |
Family
ID=4528653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6856/51A Expired GB683265A (en) | 1950-12-06 | 1951-03-22 | An improved carrier-frequency installation for communication between mobile and stationary stations |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1035439A (en) |
| GB (1) | GB683265A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5852785A (en) | 1993-03-22 | 1998-12-22 | Bartholomew; David B. | Secure access telephone extension system and method in a cordless telephone system |
| US5970127A (en) | 1997-10-16 | 1999-10-19 | Phonex Corporation | Caller identification system for wireless phone jacks and wireless modem jacks |
| US6055435A (en) | 1997-10-16 | 2000-04-25 | Phonex Corporation | Wireless telephone connection surge suppressor |
-
1951
- 1951-03-22 GB GB6856/51A patent/GB683265A/en not_active Expired
- 1951-04-16 FR FR1035439D patent/FR1035439A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5852785A (en) | 1993-03-22 | 1998-12-22 | Bartholomew; David B. | Secure access telephone extension system and method in a cordless telephone system |
| US5970127A (en) | 1997-10-16 | 1999-10-19 | Phonex Corporation | Caller identification system for wireless phone jacks and wireless modem jacks |
| US6055435A (en) | 1997-10-16 | 2000-04-25 | Phonex Corporation | Wireless telephone connection surge suppressor |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1035439A (en) | 1953-08-24 |
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