GB1591182A - Loudspeaker cooling arrangements - Google Patents
Loudspeaker cooling arrangements Download PDFInfo
- Publication number
- GB1591182A GB1591182A GB722480A GB722480A GB1591182A GB 1591182 A GB1591182 A GB 1591182A GB 722480 A GB722480 A GB 722480A GB 722480 A GB722480 A GB 722480A GB 1591182 A GB1591182 A GB 1591182A
- Authority
- GB
- United Kingdom
- Prior art keywords
- loudspeaker
- enclosure
- magnet system
- loudspeaker unit
- tube
- 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
- H04R9/02—Details
- H04R9/022—Cooling arrangements
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Description
(54) LOUDSPEAKER COOLING ARRANGEMENTS
(71) We A.R.D. ANSTALT, of P.O.
Box 34.613, 9490 Vaduz, Liechtenstein, a body corporate organised under the laws of
Liechtenstein, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:- The invention relates to a loudspeaker unit.
Particularly where large power outputs are concerned, considerable heat can be generated in the magnet system of a loudspeaker unit.
The invention accordingly provides a loudspeaker unit comprising an enclosure, a loudspeaker mounted in the enclosure, the loudspeaker having a diaphragm and driving means including a magnet system for driving the diaphragm to radiate sound through an aperture in the enclosure wall, and a cooling device for cooling the magnet system.
In accordance with the invention, the magnet system or structure may be provided with fins for example to enlarge the surface area from which heat can be radiated, but as radiation can normally be effected only into a sealed chamber which may not be of large size, it is preferred to provide a thermally conductive path to the exterior of the enclosure cabinet in which the loudspeaker is mounted.
The invention is further described below by way of example with reference to the accompanying drawing, the single figure of which is a sectional side view of a loudspeaker unit embodying the invention.
As shown in the drawing a loudspeaker unit comprises a loudspeaker 2 mounted in a cabinet or enclosure 4 so that the loudspeaker diaphragm radiates sound through an aperture in the enclosure wall. The diaphragm is driven by a voice coil co-operating with a magnet system 6. To remove heat from the magnet system 6, a heat conductive path is constituted by a tube 8 with an end opening externally of the enclosure 4 so that external air is in contact with the tube and with the magnet system 6. Preferably however as shown the tube 130 is in contact with the magnet system between its ends, both of which communicate with the cabinet exterior so that heat can be carried away by a flow of air through the tube. One tube end is disposed below the other to promote the air flow.
Instead of the free air circulation of the unit illustrated, forced air circulation could be provided, or air or another cooling fluid could be circulated with a closed system.
It will be evident that the invention can be embodied in a variety of loudspeaker units other than as specifically described within the scope of the invention as defined in the following claims.
WHAT WE CLAIM IS:
1. A loudspeaker unit comprising an enclosure, a loudspeaker mounted in the enclosure, the loudspeaker having a diaphragm and driving means including a magnet system for driving the diaphragm to radiate sound through an aperture in the enclosure wall, and a cooling device for cooling the magnet system.
2. A loudspeaker unit as claimed in claim 1 wherein the cooling device provides a thermally conductive path to the exterior of the enclosure.
3. A loudspeaker unit as claimed in claim 2 wherein the thermally conductive path comprises a tube with an end opening externally of the enclosure.
4. A loudspeaker unit as claimed in claim 3 wherein the tube has two open ends, each end communicating with the exterior of the enclosure.
5. A loudspeaker unit as claimed in claim 4 wherein one end of the tube is lower than the other.
6. A loudspeaker unit as claimed in claim 3, 4 or 5 wherein the tube is in contact with the magnet system between its ends.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (9)
1. A loudspeaker unit comprising an enclosure, a loudspeaker mounted in the enclosure, the loudspeaker having a diaphragm and driving means including a magnet system for driving the diaphragm to radiate sound through an aperture in the enclosure wall, and a cooling device for cooling the magnet system.
2. A loudspeaker unit as claimed in claim 1 wherein the cooling device provides a thermally conductive path to the exterior of the enclosure.
3. A loudspeaker unit as claimed in claim 2 wherein the thermally conductive path comprises a tube with an end opening externally of the enclosure.
4. A loudspeaker unit as claimed in claim 3 wherein the tube has two open ends, each end communicating with the exterior of the enclosure.
5. A loudspeaker unit as claimed in claim 4 wherein one end of the tube is lower than the other.
6. A loudspeaker unit as claimed in claim 3, 4 or 5 wherein the tube is in contact with the magnet system between its ends.
7. A loudspeaker unit as claimed in claim 1 wherein the cooling device comprises means for forced circulation of air or other cooling medium within a closed system.
8. A loudspeaker unit as claimed in claim 1 wherein the cooling device comprises means to enlarge the surface area of the magnet system.
9. A loudspeaker unit substantially as herein described with reference to the accompanying drawing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB722480A GB1591182A (en) | 1977-04-20 | 1977-08-17 | Loudspeaker cooling arrangements |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1650077A GB1591181A (en) | 1977-04-20 | 1977-04-20 | Loudspeaker apparatus |
GB1721577 | 1977-04-25 | ||
GB2138377 | 1977-05-20 | ||
GB2320877 | 1977-06-01 | ||
GB722480A GB1591182A (en) | 1977-04-20 | 1977-08-17 | Loudspeaker cooling arrangements |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1591182A true GB1591182A (en) | 1981-06-17 |
Family
ID=27515817
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB722480A Expired GB1591182A (en) | 1977-04-20 | 1977-08-17 | Loudspeaker cooling arrangements |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1591182A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992006569A1 (en) * | 1990-10-09 | 1992-04-16 | Stage Accompany B.V. | Electrodynamic loudspeaker with cooling arrangement |
-
1977
- 1977-08-17 GB GB722480A patent/GB1591182A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992006569A1 (en) * | 1990-10-09 | 1992-04-16 | Stage Accompany B.V. | Electrodynamic loudspeaker with cooling arrangement |
US5426707A (en) * | 1990-10-09 | 1995-06-20 | Laine B. V. | Electrodynamic loudspeaker with cooling arrangement |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |