FR20804E - Improvements in telephone construction - Google Patents
Improvements in telephone constructionInfo
- Publication number
- FR20804E FR20804E FR20804A FR20804DA FR20804E FR 20804 E FR20804 E FR 20804E FR 20804 A FR20804 A FR 20804A FR 20804D A FR20804D A FR 20804DA FR 20804 E FR20804 E FR 20804E
- Authority
- FR
- France
- Prior art keywords
- telephone construction
- telephone
- construction
- 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
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1607—Supply circuits
- H04B1/1623—Supply circuits using tubes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D1/00—Demodulation of amplitude-modulated oscillations
- H03D1/08—Demodulation of amplitude-modulated oscillations by means of non-linear two-pole elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
- H04L15/24—Apparatus or circuits at the receiving end
- H04L15/28—Code reproducing apparatus
- H04L15/285—Telegraph sounders; Apparatus for acoustic reception
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
- H04R13/02—Telephone receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
- H04R3/08—Circuits for transducers, loudspeakers or microphones for correcting frequency response of electromagnetic transducers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
- Nonlinear Science (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR100281X | 1914-12-28 | ||
FR111475T | 1915-03-01 | ||
FR100282X | 1915-03-01 | ||
GB5458/16A GB100281A (en) | 1914-12-28 | 1916-04-13 | Improvements in and relating to Telephone Receivers. |
FR22752T | 1916-12-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR20804E true FR20804E (en) | 1919-07-22 |
Family
ID=32777259
Family Applications (7)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR20804A Expired FR20804E (en) | 1914-12-28 | Improvements in telephone construction | |
FR20803A Expired FR20803E (en) | 1914-12-28 | Improvements in telephone construction | |
FR20801A Expired FR20801E (en) | 1914-12-28 | Improvements in telephone construction | |
FR488190A Expired FR488190A (en) | 1914-12-28 | 1914-12-28 | Improvements in telephone construction |
FR22212A Expired FR22212E (en) | 1914-12-28 | 1916-07-29 | Improvements in telephone construction |
FR22243A Expired FR22243E (en) | 1914-12-28 | 1916-10-30 | Improvements in telephone construction |
FR22752A Expired FR22752E (en) | 1914-12-28 | 1916-12-07 | Improvements in telephone construction |
Family Applications After (6)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR20803A Expired FR20803E (en) | 1914-12-28 | Improvements in telephone construction | |
FR20801A Expired FR20801E (en) | 1914-12-28 | Improvements in telephone construction | |
FR488190A Expired FR488190A (en) | 1914-12-28 | 1914-12-28 | Improvements in telephone construction |
FR22212A Expired FR22212E (en) | 1914-12-28 | 1916-07-29 | Improvements in telephone construction |
FR22243A Expired FR22243E (en) | 1914-12-28 | 1916-10-30 | Improvements in telephone construction |
FR22752A Expired FR22752E (en) | 1914-12-28 | 1916-12-07 | Improvements in telephone construction |
Country Status (2)
Country | Link |
---|---|
FR (7) | FR488190A (en) |
GB (4) | GB100283A (en) |
-
0
- FR FR20804A patent/FR20804E/en not_active Expired
- FR FR20803A patent/FR20803E/en not_active Expired
- FR FR20801A patent/FR20801E/en not_active Expired
-
1914
- 1914-12-28 FR FR488190A patent/FR488190A/en not_active Expired
-
1916
- 1916-04-13 GB GB5471/16A patent/GB100283A/en not_active Expired - Lifetime
- 1916-04-13 GB GB5466/16A patent/GB100282A/en not_active Expired
- 1916-07-29 FR FR22212A patent/FR22212E/en not_active Expired
- 1916-10-30 FR FR22243A patent/FR22243E/en not_active Expired
- 1916-12-07 FR FR22752A patent/FR22752E/en not_active Expired
-
1917
- 1917-10-30 GB GB15844/17A patent/GB111475A/en not_active Expired
- 1917-12-07 GB GB18201/17A patent/GB112433A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR22212E (en) | 1921-05-24 |
FR488190A (en) | 1918-09-10 |
FR22243E (en) | 1921-05-24 |
GB112433A (en) | 1918-07-18 |
GB100282A (en) | 1917-06-07 |
FR20801E (en) | 1919-07-22 |
FR22752E (en) | 1921-08-23 |
GB111475A (en) | 1918-02-14 |
GB100283A (en) | |
FR20803E (en) | 1919-07-22 |
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