GB387995A - Improvements in and relating to diaphragms for loud-speakers and the like - Google Patents
Improvements in and relating to diaphragms for loud-speakers and the likeInfo
- Publication number
- GB387995A GB387995A GB13787/31A GB1378731A GB387995A GB 387995 A GB387995 A GB 387995A GB 13787/31 A GB13787/31 A GB 13787/31A GB 1378731 A GB1378731 A GB 1378731A GB 387995 A GB387995 A GB 387995A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- sections
- apex
- diaphragms
- section
- 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
387,995. Diaphragms. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Bedford, A. V. ; 329, Germania Avenue, Schenectady, New York, U.S.A.) May 9, 1931, No. 13787. Convention date, May 9, 1930. Void [Published under Sect. 91 of the Acts]. [Class 40 (iv).] An acoustic diaphragm 10 comprises a plurality of conical sections 17, 18, 19 connected together by members 20, 21 having a high viscosity or damping coefficient, such as the flexible succinate resin known as glyptal. The diaphragm, which is driven near its apex by a coil 16, is connected at its outer edge to a leather &c. ring 11 clamped between rings 12 and near its apex to the central magnet pole 13 by means of a spider 14 and screw 15. With such an arrangement, the diaphragm sections so operate that at low frequencies the force impressed on the section of smallest mass is transmitted to the whole diaphragm, whilst, as the frequency of the impressed force rises, fewer sections respond, until, at high frequencies, only the section of smallest diameter responds.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US451172A US1846937A (en) | 1930-05-09 | 1930-05-09 | Diaphragm for loud speakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB387995A true GB387995A (en) | 1933-02-16 |
Family
ID=23791090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13787/31A Expired GB387995A (en) | 1930-05-09 | 1931-05-09 | Improvements in and relating to diaphragms for loud-speakers and the like |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1846937A (en) |
| GB (1) | GB387995A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL73443C (en) * | 1949-03-31 | |||
| US2685935A (en) * | 1949-05-20 | 1954-08-10 | Hawley Products Co | Acoustic diaphragm |
| US2641329A (en) * | 1950-05-29 | 1953-06-09 | Univ Loudspeakers Inc | Loud-speaker diaphragm with transversely arched stiffener means |
| US3026957A (en) * | 1959-06-02 | 1962-03-27 | Gladstone Lewis | Loudspeaker system |
-
1930
- 1930-05-09 US US451172A patent/US1846937A/en not_active Expired - Lifetime
-
1931
- 1931-05-09 GB GB13787/31A patent/GB387995A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1846937A (en) | 1932-02-23 |
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