FR502421A - Transmetteur téléphonique - Google Patents
Transmetteur téléphoniqueInfo
- Publication number
- FR502421A FR502421A FR502421A FR502421DA FR502421A FR 502421 A FR502421 A FR 502421A FR 502421 A FR502421 A FR 502421A FR 502421D A FR502421D A FR 502421DA FR 502421 A FR502421 A FR 502421A
- Authority
- FR
- France
- Prior art keywords
- telephone transmitter
- telephone
- 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
- 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
- H04R1/14—Throat mountings for microphones
-
- 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
- H04M1/04—Supports for telephone transmitters or receivers
- H04M1/05—Supports for telephone transmitters or receivers specially adapted for use on head, throat or breast
-
- 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
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/021—Microphones with granular resistance material
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US228311A US1329029A (en) | 1918-04-13 | 1918-04-13 | Telephone apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
FR502421A true FR502421A (fr) | 1920-05-14 |
Family
ID=22856647
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR502421A Expired FR502421A (fr) | 1918-04-13 | 1919-08-08 | Transmetteur téléphonique |
Country Status (3)
Country | Link |
---|---|
US (1) | US1329029A (de) |
DE (1) | DE348389C (de) |
FR (1) | FR502421A (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2062372A (en) * | 1933-08-11 | 1936-12-01 | Sonotone Corp | Bone conduction hearing aid |
DE750602C (de) * | 1934-08-05 | 1945-01-20 | Hans Von Baussen | Elektrisches Stethoskop |
US3218607A (en) * | 1962-12-10 | 1965-11-16 | Bendix Corp | Underwater telephone |
US4349081A (en) * | 1980-12-08 | 1982-09-14 | Audrey Pepple | Method for retaining a hearing aid in place and hearing aid harness |
USD410921S (en) * | 1998-06-11 | 1999-06-15 | Labtec, Inc. | Headset microphone |
US6179666B1 (en) * | 1999-02-05 | 2001-01-30 | Michael L. Osborn | Two-way radio accessory quick connect and extension cord |
US7310427B2 (en) * | 2002-08-01 | 2007-12-18 | Virginia Commonwealth University | Recreational bone conduction audio device, system |
CN102124753B (zh) * | 2008-11-25 | 2014-04-09 | 斯库坎迪有限公司 | 可互换的头戴耳机音频系统 |
US8687834B2 (en) * | 2009-06-25 | 2014-04-01 | Jerry Leigh Of California, Inc. | Garment with built-in audio source wiring |
US8107653B2 (en) * | 2009-06-25 | 2012-01-31 | Jerry Leigh Of California, Inc. | Garment with built-in audio source wiring |
US8553919B2 (en) * | 2009-06-25 | 2013-10-08 | Jerry Leigh Of California, Inc. | Garment with built-in audio source wiring |
US9237395B2 (en) | 2009-11-25 | 2016-01-12 | Skullcandy, Inc. | Modular audio systems and related assemblies and methods |
US9439467B2 (en) * | 2012-01-24 | 2016-09-13 | Skullcandy, Inc. | Accessory structures for connection between straps and related methods |
-
1918
- 1918-04-13 US US228311A patent/US1329029A/en not_active Expired - Lifetime
-
1919
- 1919-08-08 FR FR502421A patent/FR502421A/fr not_active Expired
-
1920
- 1920-02-04 DE DE1920348389D patent/DE348389C/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US1329029A (en) | 1920-01-27 |
DE348389C (de) | 1922-02-07 |
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