FR562185A - Dispositif transmetteur de son pour téléphones - Google Patents
Dispositif transmetteur de son pour téléphonesInfo
- Publication number
- FR562185A FR562185A FR562185DA FR562185A FR 562185 A FR562185 A FR 562185A FR 562185D A FR562185D A FR 562185DA FR 562185 A FR562185 A FR 562185A
- Authority
- FR
- France
- Prior art keywords
- telephones
- transmitter device
- sound transmitter
- sound
- transmitter
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/21—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
- H04M1/215—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads by non-intrusive coupling means, e.g. acoustic couplers
- H04M1/2155—Acoustic coupling
-
- 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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK202268X | 1922-08-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR562185A true FR562185A (fr) | 1923-11-05 |
Family
ID=8149913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR562185D Expired FR562185A (fr) | 1922-08-08 | 1923-02-15 | Dispositif transmetteur de son pour téléphones |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE387900C (fr) |
FR (1) | FR562185A (fr) |
GB (1) | GB202268A (fr) |
NL (1) | NL13467C (fr) |
-
0
- NL NL13467D patent/NL13467C/xx active
-
1922
- 1922-11-19 DE DEA38832D patent/DE387900C/de not_active Expired
-
1923
- 1923-02-03 GB GB3262/23A patent/GB202268A/en not_active Expired
- 1923-02-15 FR FR562185D patent/FR562185A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE387900C (de) | 1924-01-09 |
GB202268A (en) | 1923-10-18 |
NL13467C (fr) |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR562185A (fr) | Dispositif transmetteur de son pour téléphones | |
FR551039A (fr) | Dispositif pour carburateur | |
FR545911A (fr) | Dispositif pour encliquetage | |
CA223972A (fr) | Dispositif a sonner une cloche | |
CA225383A (fr) | Dispositif a sonner les cloches | |
FR564587A (fr) | Dispositif pour sonnerie électrique de cloches | |
FR573304A (fr) | Dispositif de sonnerie de cloche | |
FR577762A (fr) | Dispositif récepteur pour la télévision | |
FR560283A (fr) | Dispositif producteur de sons | |
FR547820A (fr) | Dispositif de transmission | |
FR26855E (fr) | Dispositif de signalisation pour automobiles | |
FR555101A (fr) | Casque pour réception téléphonique ou de t. s. f. | |
FR548481A (fr) | Dispositif de raccordement pour lignes téléphoniques | |
FR560192A (fr) | Dispositif de signalisation pour hôtels | |
FR588534A (fr) | Dispositif sonneur de cloche | |
ES80597A1 (es) | Dispositivo receptor acústico submarino. | |
FR520766A (fr) | Dispositif de sondage pour dragues | |
FR621195A (fr) | Dispositif silencieux pour téléphone | |
FR554269A (fr) | Dispositif récepteur pour appareils téléphoniques | |
FR546735A (fr) | Dispositif de transmission pour les diaphragmes des machines parlantes | |
FR587852A (fr) | Dispositif de réglage pour récepteurs téléphoniques | |
CA236859A (fr) | Dispositif a sonner les cloches | |
FR558247A (fr) | Dispositif stable pour charrue tourne-oreille | |
FR551960A (fr) | Dispositif de transmission | |
FR558523A (fr) | Dispositif de note pour pianos automatiques |