FR1032378A - Improvements to telephone headsets - Google Patents
Improvements to telephone headsetsInfo
- Publication number
- FR1032378A FR1032378A FR1032378DA FR1032378A FR 1032378 A FR1032378 A FR 1032378A FR 1032378D A FR1032378D A FR 1032378DA FR 1032378 A FR1032378 A FR 1032378A
- Authority
- FR
- France
- Prior art keywords
- telephone headsets
- headsets
- telephone
- 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
- H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor
-
- 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
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1008—Earpieces of the supra-aural or circum-aural type
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1032378T | 1951-02-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1032378A true FR1032378A (en) | 1953-07-01 |
Family
ID=9583753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1032378D Expired FR1032378A (en) | 1951-02-13 | 1951-02-13 | Improvements to telephone headsets |
Country Status (2)
Country | Link |
---|---|
US (1) | US2757247A (en) |
FR (1) | FR1032378A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1112118B (en) * | 1958-08-29 | 1961-08-03 | Siemens Ag | Earpiece, especially second earpiece for telephone stations |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3112005A (en) * | 1960-07-28 | 1963-11-26 | Ca Nat Research Council | Earphones |
US3134456A (en) * | 1960-02-04 | 1964-05-26 | Clark Co Inc David | Wide range communication and sound attenuation device |
DE3538054C3 (en) * | 1985-10-25 | 1997-01-23 | Siemens Ag | Electroacoustic transducers arranged within a handset of a telephone set |
US20080263749A1 (en) * | 2007-04-30 | 2008-10-30 | Kimberly-Clark Worldwide, Inc. | Bandless hearing protection muffs |
US7717226B2 (en) * | 2008-02-20 | 2010-05-18 | Kimberly-Clark Worldwide, Inc. | Hearing protection cap |
CN115396760A (en) * | 2021-05-20 | 2022-11-25 | 英业达科技有限公司 | Loudspeaker |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1396771A (en) * | 1918-03-27 | 1921-11-15 | Western Electric Co | Receiver-shield |
US1558191A (en) * | 1924-12-27 | 1925-10-20 | Lindemann Bruno | Earpiece |
GB274511A (en) * | 1926-07-16 | 1928-07-19 | Parnell Rabbidge | Improvements in wireless telephone receivers |
DE639189C (en) * | 1931-10-31 | 1936-11-30 | Siemens App | Telephone receivers for use in noisy environments, in particular in aircraft |
US2593892A (en) * | 1950-04-05 | 1952-04-22 | Elmore A Kindel | Earpiece |
-
1951
- 1951-02-13 FR FR1032378D patent/FR1032378A/en not_active Expired
-
1952
- 1952-02-05 US US269949A patent/US2757247A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1112118B (en) * | 1958-08-29 | 1961-08-03 | Siemens Ag | Earpiece, especially second earpiece for telephone stations |
Also Published As
Publication number | Publication date |
---|---|
US2757247A (en) | 1956-07-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CH317527A (en) | Electroacoustic converter | |
FR1032378A (en) | Improvements to telephone headsets | |
FR1037819A (en) | Improvements to shaped charges | |
FR1052695A (en) | Improvements to telephone sets | |
FR62190E (en) | Improvements to telephone sets | |
FR1042510A (en) | Covers improvements | |
FR1039265A (en) | Improvements to magnetic jacks | |
FR1041547A (en) | Loudspeaker enhancements | |
FR1047071A (en) | Improvements to presses | |
FR1028265A (en) | Improvements to self-generating telephone handsets | |
FR66517E (en) | Improvements to insulators | |
FR1033067A (en) | Improvements to anti-posse belts | |
FR1036106A (en) | Improvements to stripping devices | |
FR1018464A (en) | Improvements to telephone installations | |
FR1021685A (en) | Improvements to telephone handsets | |
FR1137252A (en) | Improvements to shipyards | |
FR1073530A (en) | Improvements to telephone installations | |
FR1034867A (en) | Improvements to pumps | |
FR1070549A (en) | Improvements to pumps | |
FR1037434A (en) | Improvements to loudspeaker telephony installations | |
FR1048233A (en) | Telephone cable | |
FR1031057A (en) | Improvements to stylographs | |
FR1050352A (en) | Improvement in telephone cables | |
AT181747B (en) | voice recorder | |
FR1042161A (en) | Microphone development |