GB560807A - Improvements in telephone or like systems - Google Patents
Improvements in telephone or like systemsInfo
- Publication number
- GB560807A GB560807A GB3044/44A GB304444A GB560807A GB 560807 A GB560807 A GB 560807A GB 3044/44 A GB3044/44 A GB 3044/44A GB 304444 A GB304444 A GB 304444A GB 560807 A GB560807 A GB 560807A
- Authority
- GB
- United Kingdom
- Prior art keywords
- automatic
- telephone
- systems
- signal
- terroni
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Telephonic Communication Services (AREA)
Abstract
560,807. Automatic and semi-automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., GILLINGS, C., BEALE, C. E., and TERRONI, T. B. D. Oct. 15, 1942, No. 3044/44. Divided out of 560,794. Drawings to Specification. [Class 40 (iv)] In a system of the kind described in Specification 559,016, in which numbers are sent over a junction in the form of voice-frequency code signals, the receipt at the incoming end of the preparatory signal preceding a code signal serves to block the talking circuit to prevent the latter signal reaching a later stage in the connection. The description is identical with that described in Specification 560,794,
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB14466/42A GB560794A (en) | 1942-10-15 | 1942-10-15 | Improvements in telephone or like systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB560807A true GB560807A (en) | 1944-04-20 |
Family
ID=10041694
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14466/42A Expired GB560794A (en) | 1942-10-15 | 1942-10-15 | Improvements in telephone or like systems |
GB3044/44A Expired GB560807A (en) | 1942-10-15 | 1942-10-15 | Improvements in telephone or like systems |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14466/42A Expired GB560794A (en) | 1942-10-15 | 1942-10-15 | Improvements in telephone or like systems |
Country Status (3)
Country | Link |
---|---|
US (1) | US2407150A (en) |
FR (1) | FR931977A (en) |
GB (2) | GB560794A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2579530A (en) * | 1947-04-29 | 1951-12-25 | Int Standard Electric Corp | Four-wire to two-wire connecting circuit |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2594719A (en) * | 1945-05-19 | 1952-04-29 | Automatic Elect Lab | Voice-frequency telephone signaling system |
GB654639A (en) * | 1947-02-07 | 1951-06-27 | Standard Telephones Cables Ltd | Improvements in or relating to electric signalling systems |
FR965560A (en) * | 1947-04-29 | 1950-09-15 | ||
US2566009A (en) * | 1947-12-12 | 1951-08-28 | Automatic Elect Lab | Interexchange switching telephone system |
US2530815A (en) * | 1949-02-02 | 1950-11-21 | Automatic Elect Lab | Mobile radiotelephone system having a single channel and a single frequency |
BE514718A (en) * | 1951-10-16 | |||
US2890282A (en) * | 1953-01-30 | 1959-06-09 | Gen Dynamics Corp | Automatic telephone system |
DE1021016B (en) * | 1955-04-29 | 1957-12-19 | Standard Elektrik Ag | Circuit arrangement for telecommunication and telecontrol systems for signal transmission according to a frequency code system |
-
1942
- 1942-10-15 GB GB14466/42A patent/GB560794A/en not_active Expired
- 1942-10-15 GB GB3044/44A patent/GB560807A/en not_active Expired
-
1943
- 1943-09-18 US US502884A patent/US2407150A/en not_active Expired - Lifetime
-
1946
- 1946-08-07 FR FR931977D patent/FR931977A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2579530A (en) * | 1947-04-29 | 1951-12-25 | Int Standard Electric Corp | Four-wire to two-wire connecting circuit |
Also Published As
Publication number | Publication date |
---|---|
GB560794A (en) | 1944-04-20 |
FR931977A (en) | 1948-03-09 |
US2407150A (en) | 1946-09-03 |
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