GB749998A - Improvements in or relating to multi-party signalling systems - Google Patents
Improvements in or relating to multi-party signalling systemsInfo
- Publication number
- GB749998A GB749998A GB2028752A GB2028752A GB749998A GB 749998 A GB749998 A GB 749998A GB 2028752 A GB2028752 A GB 2028752A GB 2028752 A GB2028752 A GB 2028752A GB 749998 A GB749998 A GB 749998A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- party
- potential
- relatively high
- substations
- 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
- H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
- H04Q5/02—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems
- H04Q5/06—Signalling by amplitude or polarity of dc
Abstract
749,998. Party-line systems. GENERAL ELECTRIC CO., Ltd. June 12, 1953 [Aug. 12, 1952], No. 20287/52. Class 40 (4). On an eight-party-line, Fig. 1, a particular substation is selectively called by the application of a relatively high potential of a particular polarity to a particular line wire together with the application of an alternating potential to one or other line wire, causing the firing of gas tubes G and the operation of relays A at two substations and the ringing of bell B at one of them. On a sixteen-party-line, Fig. 2 (only eight parties being shown), each substation has an additional relay B and the additional calling condition consists of a relatively low potential of selected polarity applied to that line wire which is not carrying the relatively high potential. The removal of the relatively high calling potential leaves the ringing circuits at all the substations in a non-conducting condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2028752A GB749998A (en) | 1952-08-12 | 1952-08-12 | Improvements in or relating to multi-party signalling systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2028752A GB749998A (en) | 1952-08-12 | 1952-08-12 | Improvements in or relating to multi-party signalling systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB749998A true GB749998A (en) | 1956-06-06 |
Family
ID=10143487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2028752A Expired GB749998A (en) | 1952-08-12 | 1952-08-12 | Improvements in or relating to multi-party signalling systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB749998A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2875281A (en) * | 1954-03-08 | 1959-02-24 | Bell Telephone Labor Inc | Telephone ringing system |
-
1952
- 1952-08-12 GB GB2028752A patent/GB749998A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2875281A (en) * | 1954-03-08 | 1959-02-24 | Bell Telephone Labor Inc | Telephone ringing system |
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