GB1045807A - Loudspeaker - Google Patents
LoudspeakerInfo
- Publication number
- GB1045807A GB1045807A GB2487064A GB2487064A GB1045807A GB 1045807 A GB1045807 A GB 1045807A GB 2487064 A GB2487064 A GB 2487064A GB 2487064 A GB2487064 A GB 2487064A GB 1045807 A GB1045807 A GB 1045807A
- Authority
- GB
- United Kingdom
- Prior art keywords
- speech coil
- polepiece
- plate
- speech
- polepieces
- 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
- H04R9/063—Loudspeakers using a plurality of acoustic drivers
-
- 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
- H04R9/046—Construction
- H04R9/047—Construction in which the windings of the moving coil lay in the same plane
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
1,045,807. Loud-speakers. W. F. EWALD. June 16, 1964, No. 24870/64. Heading H4J. A loud-speaker speech coil 4 (Fig. 1a comprises a flat plate 4<SP>1</SP> of insulating material and a metal foil on the plate etched in the form of a flat spiral 16. Preferably congruent spirals 16 on opposite sides of the plate 4<SP>1</SP> are interconnected at 13 with outer ends at 14, 15, and are wound so that current flows in the same direction in the corresponding limb of each spiral. Tabs 17 are fastened to a diaphragm at the top and to a guide spring at the bottom. A plurality of such speech coils 4 may be secured side-by-side with interposed insulation. Pole plates may be disposed on either side of the plate 4<SP>1</SP> opposite the upper and lower limbs of the speech coil 4 to form two gaps across which magnetic fields are directed in opposite directions by two oppositely directed magnets (Fig. 2a, not shown). The speech coil is connected to the junction of two rectangular diaphragms with stiffening ribs perpendicular to the junction. Alternatively the diaphragm may be conical (not shown) in which case its apex will be provided with a closed keel the length of the speech coil 4. In another arrangement, permanent magnets 5<SP>1</SP>, 61 (Fig. 3a) are provided, together with rear stirrup-shaped polepieces 7<SP>1</SP>, 8<SP>1</SP> and flat front polepieces 9<SP>1</SP>, 10<SP>1</SP>. The speech coil 4 may be centred through a slot 2 and is secured to end guide springs 11, 12 (Fig. 3b, not shown). In a further arrangement, a single permanent magnet 5<SP>2</SP> (Fig. 4a) magnetized perpendicular to the direction of the plane of the speech coil 4 has a stirrup-shaped polepiece 7<SP>2</SP> extending round the magnet 5<SP>2</SP> and a polepiece 9<SP>2</SP> to define with the latter an air gap in which the speech coil 4 lies. The magnet 5<SP>2</SP> also has a stirrupshaped polepiece 8<SP>2</SP> and a channel-shaped polepiece 10<SP>2</SP> defining a second air gap. In a modification (Fig. 4c, not shown) the two lower polepieces 8<SP>3</SP>, 10<SP>3</SP> are each of U-shape and are interdigitated.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEE26750A DE1251381B (en) | 1964-06-16 | ||
DEE23296A DE1223421B (en) | 1962-07-31 | 1962-07-31 | speaker |
FR978146A FR1407123A (en) | 1964-06-12 | 1964-06-12 | Device forming a loudspeaker or the like with a voice coil chemically etched in a metal foil and its various applications |
GB2487064A GB1045807A (en) | 1964-06-16 | 1964-06-16 | Loudspeaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2487064A GB1045807A (en) | 1964-06-16 | 1964-06-16 | Loudspeaker |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1045807A true GB1045807A (en) | 1966-10-19 |
Family
ID=10218566
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2487064A Expired GB1045807A (en) | 1962-07-31 | 1964-06-16 | Loudspeaker |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1251381B (en) |
GB (1) | GB1045807A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0048434A1 (en) * | 1980-09-19 | 1982-03-31 | Electro-Magnetic Corporation | Electro acoustic planar transducer |
EP0098895A1 (en) * | 1980-09-15 | 1984-01-25 | Robert Warren Necoechea | Rigid diaphragm transducer with plural coils |
GB2123651A (en) * | 1982-06-29 | 1984-02-01 | Stanley Kelly | Transducers |
DE102019120137B3 (en) * | 2019-07-25 | 2020-08-13 | Karsten Atmani, bürgerlicher Name Buß | Electrodynamic loudspeaker |
CN113692749A (en) * | 2019-02-25 | 2021-11-23 | 回响公司 | Multi-range loudspeaker comprising a plurality of diaphragms |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5843091U (en) * | 1981-09-17 | 1983-03-23 | 澤藤 正 | Diaphragm for electroacoustic transducer |
US5198624A (en) * | 1988-02-10 | 1993-03-30 | Linaeum Corporation | Audio transducer with controlled flexibility diaphragm |
US4903308A (en) * | 1988-02-10 | 1990-02-20 | Linaeum Corporation | Audio transducer with controlled flexibility diaphragm |
-
0
- DE DEE26750A patent/DE1251381B/de active Pending
-
1964
- 1964-06-16 GB GB2487064A patent/GB1045807A/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0098895A1 (en) * | 1980-09-15 | 1984-01-25 | Robert Warren Necoechea | Rigid diaphragm transducer with plural coils |
EP0048434A1 (en) * | 1980-09-19 | 1982-03-31 | Electro-Magnetic Corporation | Electro acoustic planar transducer |
GB2123651A (en) * | 1982-06-29 | 1984-02-01 | Stanley Kelly | Transducers |
CN113692749A (en) * | 2019-02-25 | 2021-11-23 | 回响公司 | Multi-range loudspeaker comprising a plurality of diaphragms |
EP3932089A4 (en) * | 2019-02-25 | 2023-02-22 | Resonado, Inc. | A multi-range speaker containing multiple diaphragms |
US11595750B2 (en) | 2019-02-25 | 2023-02-28 | Resonado, Inc. | Multi-range speaker containing multiple diaphragms |
DE102019120137B3 (en) * | 2019-07-25 | 2020-08-13 | Karsten Atmani, bürgerlicher Name Buß | Electrodynamic loudspeaker |
WO2021013305A1 (en) | 2019-07-25 | 2021-01-28 | Buss Karsten | Electrodynamic loudspeaker |
US12003936B2 (en) | 2019-07-25 | 2024-06-04 | Karsten Buss | Electrodynamic loudspeaker |
Also Published As
Publication number | Publication date |
---|---|
DE1251381B (en) |
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