GB848431A - Improvements relating to loudspeakers - Google Patents

Improvements relating to loudspeakers

Info

Publication number
GB848431A
GB848431A GB3884857A GB3884857A GB848431A GB 848431 A GB848431 A GB 848431A GB 3884857 A GB3884857 A GB 3884857A GB 3884857 A GB3884857 A GB 3884857A GB 848431 A GB848431 A GB 848431A
Authority
GB
United Kingdom
Prior art keywords
amplifier
plate
loud
driver unit
jan
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
GB3884857A
Inventor
Guy Rupert Fountain
Ronald Hastings Rackham
Terence Brian Livingstone
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.)
Tannoy Ltd
Original Assignee
Tannoy Ltd
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
Application filed by Tannoy Ltd filed Critical Tannoy Ltd
Priority to GB3884857A priority Critical patent/GB848431A/en
Publication of GB848431A publication Critical patent/GB848431A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

848,431. Loud-speakers. TANNOY Ltd. Jan. 19, 1959 [Dec. 13, 1957; Jan. 10, 1955], Nos. 38848/57 and 1023/58. Class 40 (4). In a moving-coil loud-speaker, at least the output stage of a transistor amplifier is combined with the driver unit to constitute a single unitary component. The invention is described as applied to a re-entrant horn loud-speaker of which the horn 1 is interchangeable by employing the construction described in Specification 703,810. The driver unit 2 includes a domed diaphragm 10 driven by a speech coil (not shown) co-operating with the pole structure 11, and is enclosed in a casing 12 which is continued at 13 to enclose the amplifier 3. The amplifier components are mounted in two groups 14, 15 on a copper plate 16 constituting a partition between the driver unit 2 and the amplifier 3. The plate 16, which acts as a heat sink for the power transistor 17, is cooled by air set in a state of turbulence by the diaphragm 10. To this end the pole structure is held together by a hollow tube 20, as described in Specification 703,809, through which tube the air passes. The plate 16 may be provided with holes or louvres so that the air circulation may extend to the cavity bounded by the plate 16 and the cover 13.
GB3884857A 1957-12-13 1957-12-13 Improvements relating to loudspeakers Expired GB848431A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3884857A GB848431A (en) 1957-12-13 1957-12-13 Improvements relating to loudspeakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3884857A GB848431A (en) 1957-12-13 1957-12-13 Improvements relating to loudspeakers

Publications (1)

Publication Number Publication Date
GB848431A true GB848431A (en) 1960-09-14

Family

ID=10406062

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3884857A Expired GB848431A (en) 1957-12-13 1957-12-13 Improvements relating to loudspeakers

Country Status (1)

Country Link
GB (1) GB848431A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2315741A1 (en) * 1975-06-23 1977-01-21 Setton Jack Loudspeaker housing incorporating amplifier - has power transistors heat sink adjacent housing aperture dimensioned to exploit ventilation stimulated by speaker
US4550229A (en) * 1982-09-29 1985-10-29 Hwang Shih M Trumpet horn speaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2315741A1 (en) * 1975-06-23 1977-01-21 Setton Jack Loudspeaker housing incorporating amplifier - has power transistors heat sink adjacent housing aperture dimensioned to exploit ventilation stimulated by speaker
US4550229A (en) * 1982-09-29 1985-10-29 Hwang Shih M Trumpet horn speaker

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