DE155898C - - Google Patents
Info
- Publication number
- DE155898C DE155898C DENDAT155898D DE155898DA DE155898C DE 155898 C DE155898 C DE 155898C DE NDAT155898 D DENDAT155898 D DE NDAT155898D DE 155898D A DE155898D A DE 155898DA DE 155898 C DE155898 C DE 155898C
- Authority
- DE
- Germany
- Prior art keywords
- microphone
- membrane
- telephone
- plate
- sound waves
- 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
- 239000012528 membrane Substances 0.000 claims description 14
- 239000002775 capsule Substances 0.000 claims description 3
- 125000002066 L-histidyl group Chemical group [H]N1C([H])=NC(C([H])([H])[C@](C(=O)[*])([H])N([H])[H])=C1[H] 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE155898T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE155898C true DE155898C (enrdf_load_stackoverflow) |
Family
ID=5677429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT155898D Active DE155898C (enrdf_load_stackoverflow) |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE155898C (enrdf_load_stackoverflow) |
| FR (1) | FR339458A (enrdf_load_stackoverflow) |
-
0
- DE DENDAT155898D patent/DE155898C/de active Active
-
1904
- 1904-01-09 FR FR339458A patent/FR339458A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR339458A (fr) | 1904-06-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE1270120C2 (de) | Telephonapparat in form eines fussstaenders | |
| DE3446771A1 (de) | Anordnung zur verbesserung der sprachuebertragung aus einer atemschutzmaske | |
| EP0238937A1 (de) | Sprech- und Höreinrichtung für Atemgeräte | |
| DE155898C (enrdf_load_stackoverflow) | ||
| DE2548707A1 (de) | Geraet zum vertreiben von stechmuecken | |
| DE492633C (de) | Lebende und sprechende Reklame- und Schaustellungspuppe | |
| DE439808C (de) | Kopfhoerer | |
| DE1762574A1 (de) | Fernsprechapparat | |
| AT24248B (de) | Mikrotelephon. | |
| DE329372C (de) | Hoerapparat fuer Schwerhoerige | |
| DE612628C (de) | Fernsprechhandapparat mit Nummernschalter | |
| DE2262798B2 (de) | Lautfernsprechgerät | |
| DE814463C (de) | Telephonapparat | |
| DE652080C (de) | Anordnung zur Fernbesprechung und zum Fernabhoeren eines Fernsprechers | |
| DE2430480C2 (de) | Fernsprechhandapparat | |
| DE185200C (enrdf_load_stackoverflow) | ||
| DE592422C (de) | Elektrischer Hoerapparat fuer Schwerhoerige | |
| DE245049C (enrdf_load_stackoverflow) | ||
| DE385754C (de) | Einrichtung zur UEbertragung der Schwingungen einer schallerzeugenden Membran auf eine zweite Membran zum Zwecke der Weiterleitung der Schwingungen | |
| DE21073C (de) | Neuerungen an telephonischen Apparaten für Schwerhörige | |
| DE363278C (de) | Gestell zum Halten des Mikrotelephons in Sprechlage | |
| AT136837B (de) | Fernsprech-Handapparat mit Nummernschalter. | |
| AT8720B (de) | Telephonischer Hörhilfsapparat für Schwerhörige. | |
| DE363743C (de) | Vorrichtung zur Erzeugung bzw. UEbertragung von Schwingungen | |
| DE2210902C3 (de) | AnschluBfreies Telefon-Fernbedienungsgerät |