GB217944A - Improvements in sound reproducing devices - Google Patents
Improvements in sound reproducing devicesInfo
- Publication number
- GB217944A GB217944A GB1934/23A GB193423A GB217944A GB 217944 A GB217944 A GB 217944A GB 1934/23 A GB1934/23 A GB 1934/23A GB 193423 A GB193423 A GB 193423A GB 217944 A GB217944 A GB 217944A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- arm
- sound
- transmitting member
- bifurcated
- 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
- H04R11/00—Transducers of moving-armature or moving-core type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Electromagnets (AREA)
Abstract
217,944. Alexander, A. E., (Herald Laboratories Inc.). Jan. 22, 1923. No Patent granted (Sealing fee not paid). Tool arms and mountings.-In sound reproducing devices a connecting member, arranged between the sound transmitting member and the diaphragm, consists of a part connected with the diaphragm, a part connected with the sound transmitting member and a resilient part to which tension is applied for the purpose of counterbalancing any initial tension on the diaphragm. In an example applied to a telephone receiver, the connecting member is pivoted on knife edges 30 and the parts 33, 34 comprise a bifurcated lever of which the arm 33, connected to the diaphragm, is comparatively light and resilient and the arm 34, connected to the sound transmitting member, is comparatively heavy and rigid. In one form, Figs. 1 and 3, the resilient part 32 is a spring adjusted by a screw 40, but in another form, Fig. 5, two springs 51, 52 are attached to the bifurcated arms 33, 34 and adjusted by means of screws 53, 54, the bifurcated arm being pivoted on knife edges 50. In operation, the nuts 41, by which the arm 33 is connected to the diaphragm, are loosened, adjustment of the sound-transmitting member is carried out, and the nuts 41 tightened again.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US604632A US1564968A (en) | 1922-12-02 | 1922-12-02 | Sound-reproducing device |
Publications (1)
Publication Number | Publication Date |
---|---|
GB217944A true GB217944A (en) | 1924-06-23 |
Family
ID=9730579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1934/23A Expired GB217944A (en) | 1922-12-02 | 1923-01-22 | Improvements in sound reproducing devices |
Country Status (3)
Country | Link |
---|---|
US (1) | US1564968A (en) |
FR (1) | FR577563A (en) |
GB (1) | GB217944A (en) |
-
1922
- 1922-12-02 US US604632A patent/US1564968A/en not_active Expired - Lifetime
-
1923
- 1923-01-22 GB GB1934/23A patent/GB217944A/en not_active Expired
-
1924
- 1924-02-21 FR FR577563D patent/FR577563A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR577563A (en) | 1924-08-08 |
US1564968A (en) | 1925-12-08 |
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