CH257252A - Device for initiating operations through telephone calls. - Google Patents
Device for initiating operations through telephone calls.Info
- Publication number
- CH257252A CH257252A CH257252DA CH257252A CH 257252 A CH257252 A CH 257252A CH 257252D A CH257252D A CH 257252DA CH 257252 A CH257252 A CH 257252A
- Authority
- CH
- Switzerland
- Prior art keywords
- telephone calls
- initiating operations
- initiating
- operations
- calls
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
- H04M1/65—Recording arrangements for recording a message from the calling party
- H04M1/652—Means for playing back the recorded messages by remote control over a telephone line
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
- H04M1/65—Recording arrangements for recording a message from the calling party
- H04M1/6515—Recording arrangements for recording a message from the calling party using magnetic tape
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH2489638X | 1944-12-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH257252A true CH257252A (en) | 1948-09-30 |
Family
ID=4569601
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH257252D CH257252A (en) | 1944-12-11 | 1944-12-11 | Device for initiating operations through telephone calls. |
Country Status (6)
Country | Link |
---|---|
US (1) | US2489638A (en) |
AT (1) | AT163570B (en) |
BE (1) | BE460890A (en) |
CH (1) | CH257252A (en) |
FR (1) | FR913552A (en) |
NL (1) | NL65337C (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2601393A (en) * | 1948-05-27 | 1952-06-24 | Jr John Hays Hammond | Selective remote control system |
NL225651A (en) * | 1951-05-10 | |||
NL232402A (en) * | 1957-10-23 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL11285C (en) * | 1920-12-20 | |||
FR543176A (en) * | 1921-03-22 | 1922-08-29 | Radio Electr Soc Fr | Call selector |
US1595241A (en) * | 1923-11-26 | 1926-08-10 | Robert O Nelson | Automatic phonograph |
US1888904A (en) * | 1928-10-16 | 1932-11-22 | Brauer Ernst | Station calling device |
US2072079A (en) * | 1933-10-13 | 1937-03-02 | Gen Railway Signal Co | Centralized traffic controlling system for railroads |
US2141551A (en) * | 1936-08-01 | 1938-12-27 | Gen Railway Signal Co | Centralized traffic controlling system for railroads |
US2194559A (en) * | 1937-04-28 | 1940-03-26 | Rca Corp | Frequency responsive relay |
US2276646A (en) * | 1939-01-18 | 1942-03-17 | Westinghouse Electric & Mfg Co | Supervisory control system |
US2230486A (en) * | 1939-06-15 | 1941-02-04 | Lyndon A Durant | Selector mechanism |
US2238976A (en) * | 1940-07-29 | 1941-04-22 | Carl F Huebotter | Remote control sound record reproducing system |
US2306654A (en) * | 1941-05-28 | 1942-12-29 | Rock Ola Mfg Corp | Phonograph |
US2368826A (en) * | 1942-05-11 | 1945-02-06 | Gen Railway Signal Co | Centralized traffic controlling system for railroads |
US2399738A (en) * | 1944-03-29 | 1946-05-07 | Gen Railway Signal Co | Centralized traffic controlling system for railroads |
-
0
- BE BE460890D patent/BE460890A/xx unknown
- NL NL65337D patent/NL65337C/xx active
-
1944
- 1944-12-11 CH CH257252D patent/CH257252A/en unknown
-
1945
- 1945-03-20 US US583696A patent/US2489638A/en not_active Expired - Lifetime
- 1945-08-22 FR FR913552D patent/FR913552A/en not_active Expired
-
1946
- 1946-11-09 AT AT163570D patent/AT163570B/en active
Also Published As
Publication number | Publication date |
---|---|
NL65337C (en) | |
BE460890A (en) | |
FR913552A (en) | 1946-09-13 |
US2489638A (en) | 1949-11-29 |
AT163570B (en) | 1949-07-25 |
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