NL71904C - - Google Patents
Info
- Publication number
- NL71904C NL71904C NL71904DA NL71904C NL 71904 C NL71904 C NL 71904C NL 71904D A NL71904D A NL 71904DA NL 71904 C NL71904 C NL 71904C
- Authority
- NL
- Netherlands
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K1/00—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs
- G10K1/06—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube
- G10K1/062—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube electrically operated
- G10K1/063—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube electrically operated the sounding member being a bell
- G10K1/064—Operating or striking mechanisms therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Electromagnets (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH2502273X | 1947-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL71904C true NL71904C (US07714131-20100511-C00038.png) |
Family
ID=4569689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL71904D NL71904C (US07714131-20100511-C00038.png) | 1947-06-14 |
Country Status (6)
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2756372A (en) * | 1953-01-28 | 1956-07-24 | Teletype Corp | Telegraph selector magnet device |
| US2863951A (en) * | 1954-12-24 | 1958-12-09 | Int Standard Electric Corp | Combined telephone ringing and induction coil arrangement |
| BE558459A (US07714131-20100511-C00038.png) * | 1956-06-19 | |||
| GB2081486B (en) * | 1980-07-30 | 1983-11-02 | Philips Electronic Associated | Telephone bell assembly |
| US7528312B1 (en) * | 2007-02-21 | 2009-05-05 | Digiovanni Stephen | Drum for striking upwardly and method therefor |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US409675A (en) * | 1889-08-27 | Stephen dudley field | ||
| US1386690A (en) * | 1921-08-09 | Gttstavtts c | ||
| US980613A (en) * | 1909-07-31 | 1911-01-03 | Dean Electric Co | Telephone system. |
| US1162069A (en) * | 1915-05-10 | 1915-11-30 | Western Electric Co | Telephone system. |
| US1484396A (en) * | 1920-12-22 | 1924-02-19 | Western Electric Co | Telephone system |
| US1872257A (en) * | 1930-12-05 | 1932-08-16 | James D Durkee | Radio alarm system |
| US1896196A (en) * | 1931-02-05 | 1933-02-07 | American Telephone & Telegraph | Telephone substation apparatus |
| CH174218A (de) * | 1933-04-11 | 1934-12-31 | Siemens Ag | Polarisiertes Relais. |
| DE654405C (de) * | 1933-04-11 | 1937-12-22 | Rupert Evan Howard Carpenter | Polarisierte elektromagnetische Vorrichtung mit schwingendem Anker |
| US2268612A (en) * | 1937-10-11 | 1942-01-06 | Askania Werke Ag | Follow-up device |
-
0
- BE BE483203D patent/BE483203A/xx unknown
- NL NL71904D patent/NL71904C/xx active
-
1947
- 1947-06-14 CH CH268993D patent/CH268993A/de unknown
-
1948
- 1948-06-14 FR FR971292D patent/FR971292A/fr not_active Expired
- 1948-06-17 US US33525A patent/US2502273A/en not_active Expired - Lifetime
-
1949
- 1949-01-01 DE DEP29179D patent/DE836202C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE483203A (US07714131-20100511-C00038.png) | |
| US2502273A (en) | 1950-03-28 |
| FR971292A (fr) | 1951-01-15 |
| CH268993A (de) | 1950-06-15 |
| DE836202C (de) | 1952-04-10 |
