FR541836A - Commutateur de ligne secondaire rotatif - Google Patents
Commutateur de ligne secondaire rotatifInfo
- Publication number
- FR541836A FR541836A FR541836DA FR541836A FR 541836 A FR541836 A FR 541836A FR 541836D A FR541836D A FR 541836DA FR 541836 A FR541836 A FR 541836A
- Authority
- FR
- France
- Prior art keywords
- line switch
- secondary line
- rotary secondary
- rotary
- switch
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Interface Circuits In Exchanges (AREA)
- Relay Circuits (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US414080A US1474648A (en) | 1920-10-01 | 1920-10-01 | Automatic telephone system |
US549730A US1528751A (en) | 1920-10-01 | 1922-04-05 | Telephone trunking system |
Publications (1)
Publication Number | Publication Date |
---|---|
FR541836A true FR541836A (fr) | 1922-08-02 |
Family
ID=24194174
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR541836D Expired FR541836A (fr) | 1920-10-01 | 1921-09-30 | Commutateur de ligne secondaire rotatif |
FR27796D Expired FR27796E (fr) | 1920-10-01 | 1923-03-22 | Commutateur de ligne secondaire rotatif |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR27796D Expired FR27796E (fr) | 1920-10-01 | 1923-03-22 | Commutateur de ligne secondaire rotatif |
Country Status (3)
Country | Link |
---|---|
US (2) | US1474648A (fr) |
DE (2) | DE393561C (fr) |
FR (2) | FR541836A (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE508254A (fr) * | 1951-01-22 | |||
GB2452036A (en) * | 2007-08-20 | 2009-02-25 | Adrian John Laurence Scarsbrook | Baby restraining device for use with a baby changing mat |
-
1920
- 1920-10-01 US US414080A patent/US1474648A/en not_active Expired - Lifetime
-
1921
- 1921-09-30 FR FR541836D patent/FR541836A/fr not_active Expired
- 1921-10-02 DE DEA36394D patent/DE393561C/de not_active Expired
-
1922
- 1922-04-05 US US549730A patent/US1528751A/en not_active Expired - Lifetime
-
1923
- 1923-03-22 FR FR27796D patent/FR27796E/fr not_active Expired
- 1923-04-06 DE DEA39742D patent/DE412664C/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR27796E (fr) | 1924-08-18 |
DE393561C (de) | 1924-04-05 |
DE412664C (de) | 1925-04-25 |
US1474648A (en) | 1923-11-20 |
US1528751A (en) | 1925-03-10 |
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