DE234973C - - Google Patents
Info
- Publication number
- DE234973C DE234973C DENDAT234973D DE234973DA DE234973C DE 234973 C DE234973 C DE 234973C DE NDAT234973 D DENDAT234973 D DE NDAT234973D DE 234973D A DE234973D A DE 234973DA DE 234973 C DE234973 C DE 234973C
- Authority
- DE
- Germany
- Prior art keywords
- transmitter
- telephone
- circuit
- microphone
- portable
- 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.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 claims description 2
- 201000010099 disease Diseases 0.000 claims 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 241000580482 Acidobacteria Species 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/12—Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB191008332T | 1910-04-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE234973C true DE234973C (enrdf_load_stackoverflow) |
Family
ID=32491876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT234973D Active DE234973C (enrdf_load_stackoverflow) | 1910-04-06 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE234973C (enrdf_load_stackoverflow) |
| FR (1) | FR416956A (enrdf_load_stackoverflow) |
| GB (1) | GB191008332A (enrdf_load_stackoverflow) |
-
0
- DE DENDAT234973D patent/DE234973C/de active Active
-
1910
- 1910-04-06 GB GB191008332D patent/GB191008332A/en not_active Expired
- 1910-04-26 FR FR416956A patent/FR416956A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR416956A (fr) | 1910-11-03 |
| GB191008332A (en) | 1910-09-29 |
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