GB346301A - Improvements in or relating to automatic or semi-automatic telephone exchange systems - Google Patents
Improvements in or relating to automatic or semi-automatic telephone exchange systemsInfo
- Publication number
- GB346301A GB346301A GB610/30A GB61030A GB346301A GB 346301 A GB346301 A GB 346301A GB 610/30 A GB610/30 A GB 610/30A GB 61030 A GB61030 A GB 61030A GB 346301 A GB346301 A GB 346301A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- repeater
- metering
- impulses
- byepath
- 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
- H04Q3/00—Selecting arrangements
- H04Q3/0016—Arrangements providing connection between exchanges
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Motor And Converter Starters (AREA)
- Meter Arrangements (AREA)
Abstract
346,301. Automatic exchange systems. STANDARD TELEPHONES & CABLES, Ltd., HARTLEY, G. C., and WRIGHT, E. P. G., Columbia House, Aldwych, London. Jan. 7, 1930, No. 610. [Class 40 (iv).] Repeaters have an alternative through metallic circuit which is connected up in the case of a call from an operator so that busy &c. signals may be passed back without repetition. A metallic circuit may also be normally connected up so that impulses and particularly code impulses may be transmitted forward without repetition. Figs. 1, 2, 3, show repeater circuits for use in the byepath system described in Specification 346,368 for calls to a. tandem office, to a coder-call-indicator manual office, and to a directly-reached automatic office respectively. Zone-metering arrangements are associated with each repeater, metering for tandem calls being variable according to a signal sent from a register translator whilst for other calls a fixed charge is made at each repeater. Tandem repeater, Fig. 1. Relay BS operates over the test conductor BPT from the byepath and energizes JS. Impulses coming over the byepath conductors BP-, BP+, pass directly through the repeater, and at the end of the transmission when the connection has been extended over the talking-circuit selector, relay AS operates, energizing relay HS. The connection of metering ground at the register-translator to one or other or both of the byepath leads BP-, BP+, controls relays MX, MZ. When the called subscriber replies, relay DS releases relay HS causing a start signal to be transmitted over lead S to common metering apparatus of the type shown in Specification 345,267 whereby the appropriate number of booster metering impulses is transmitted over leads B, H. At the end of the cycle, relays MX, MZ are short-circuited over lead SC. In the case of a call from an operator, the connection of direct earth to lead H releases relay JS, AS, BS. A through metallic circuit is thus extended through the repeater and since relays MX. MZ are not locked up metering is prevented. Repeater to coder-call-indicator exchange, Fig. 2. Relays BS, HS, JS operate on seizure and the code impulses from the byepath pass directly through. For an ordinary call, at the end of code-sending relay AS operates to complete the outgoing loop and when the called subscriber replies relay DS energizes and connects ground to the metering start lead whereby a fixed number of booster metering impulses as determined by the wiring F individual to the repeater is transmitted over leads B, H. Relay HS is then short-circuited and releases. For a call from an operator, relay JS releases and a metallic circuit is extended through the repeater. Direct-junction repeater, Fig. 3. On seizure,' relays JS, AS, BS operate, completing an outgoing loop. When the distant exchange is ready to receive impulses relay IS operates, energizing relay MS which short-circuits a resistance in the incoming loop to repeat this signal back to the byepath. Incoming impulses are repeated by relay AS, and at the end of the transmission, relay HS operates. When the called subscriber replies, relay DS energizes to initiate metering which takes place as in Fig. 2. For a call from an operator a direct earth on lead H releases relay JS to complete a throughmetallic-circuit as before. In the repeater of Fig. 3 a single pair of incoming leads is multipled to the positive and negative leads from the byepath and from the conversation selector.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB610/30A GB346301A (en) | 1930-01-07 | 1930-01-07 | Improvements in or relating to automatic or semi-automatic telephone exchange systems |
GB611/30A GB346368A (en) | 1930-01-07 | 1930-01-07 | Improvements in or relating to automatic or semi-automatic telephone exchange systems |
DE1930638308D DE638308C (en) | 1930-01-07 | 1930-08-02 | Circuit arrangement for automatic or semi-automatic telephone systems with several exchanges |
FR719744D FR719744A (en) | 1930-01-07 | 1930-10-02 | Circuit arrangements for automatic and semi-automatic telephone systems |
US506884A US1903019A (en) | 1930-01-07 | 1931-01-06 | Automatic or semiautomatic telephone exchange system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB610/30A GB346301A (en) | 1930-01-07 | 1930-01-07 | Improvements in or relating to automatic or semi-automatic telephone exchange systems |
FR719744T | 1930-10-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB346301A true GB346301A (en) | 1931-04-07 |
Family
ID=9707385
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB611/30A Expired GB346368A (en) | 1930-01-07 | 1930-01-07 | Improvements in or relating to automatic or semi-automatic telephone exchange systems |
GB610/30A Expired GB346301A (en) | 1930-01-07 | 1930-01-07 | Improvements in or relating to automatic or semi-automatic telephone exchange systems |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB611/30A Expired GB346368A (en) | 1930-01-07 | 1930-01-07 | Improvements in or relating to automatic or semi-automatic telephone exchange systems |
Country Status (4)
Country | Link |
---|---|
US (1) | US1903019A (en) |
DE (1) | DE638308C (en) |
FR (1) | FR719744A (en) |
GB (2) | GB346368A (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE480490A (en) * | 1939-07-26 | |||
US2588685A (en) * | 1939-07-26 | 1952-03-11 | Automatic Elect Lab | Register-sender for automatic telephony |
US2597007A (en) * | 1942-03-31 | 1952-05-20 | Int Standard Electric Corp | Common control circuit for operating switches rearward to calling line |
GB628176A (en) * | 1944-02-05 | 1949-08-24 | Int Standard Electric Corp | Improvements in or relating to telecommunication switching systems |
GB656118A (en) * | 1948-01-09 | 1951-08-15 | Ericsson Telefon Ab L M | Improvements in or relating to automatic telephone systems |
BE493863A (en) * | 1949-02-12 | |||
US2680781A (en) * | 1949-11-08 | 1954-06-08 | Bell Telephone Labor Inc | Translating arrangement |
DE925654C (en) * | 1952-08-24 | 1955-03-28 | Standard Elek Zitaets Ges Ag | Circuit arrangement for telecommunications systems |
-
1930
- 1930-01-07 GB GB611/30A patent/GB346368A/en not_active Expired
- 1930-01-07 GB GB610/30A patent/GB346301A/en not_active Expired
- 1930-08-02 DE DE1930638308D patent/DE638308C/en not_active Expired
- 1930-10-02 FR FR719744D patent/FR719744A/en not_active Expired
-
1931
- 1931-01-06 US US506884A patent/US1903019A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US1903019A (en) | 1933-03-28 |
GB346368A (en) | 1931-04-07 |
FR719744A (en) | 1932-02-12 |
DE638308C (en) | 1936-11-20 |
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