GB1591182A - Loudspeaker cooling arrangements - Google Patents

Loudspeaker cooling arrangements Download PDF

Info

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
Application number
GB722480A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ARD ANSTALT
Original Assignee
ARD ANSTALT
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from GB1650077A external-priority patent/GB1591181A/en
Application filed by ARD ANSTALT filed Critical ARD ANSTALT
Priority to GB722480A priority Critical patent/GB1591182A/en
Publication of GB1591182A publication Critical patent/GB1591182A/en
Expired legal-status Critical Current

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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)

**WARNING** start of CLMS field may overlap end of DESC **. (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.
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.
GB722480A 1977-04-20 1977-08-17 Loudspeaker cooling arrangements Expired GB1591182A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee