GB2334849B - The double diaphragm - Google Patents

The double diaphragm

Info

Publication number: GB2334849B
Authority: GB; United Kingdom
Prior art keywords: double diaphragm; diaphragm; double
Prior art date: 1998-02-27
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 - Fee Related

Application number

GB9804275A

Other versions

GB9804275D0 (en

GB2334849A (en

Inventor

Simon James Norfolk

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.)

Individual

Original Assignee

Individual

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.)

1998-02-27

Filing date

1998-02-27

Publication date

2001-02-28

1998-02-27 Application filed by Individual filed Critical Individual

1998-02-27 Priority to GB9804275A priority Critical patent/GB2334849B/en

1998-04-22 Publication of GB9804275D0 publication Critical patent/GB9804275D0/en

1999-09-01 Publication of GB2334849A publication Critical patent/GB2334849A/en

2001-02-28 Application granted granted Critical

2001-02-28 Publication of GB2334849B publication Critical patent/GB2334849B/en

2018-02-27 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

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

Landscapes

Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

GB9804275A 1998-02-27 1998-02-27 The double diaphragm Expired - Fee Related GB2334849B (en)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
GB9804275A GB2334849B (en)	1998-02-27	1998-02-27	The double diaphragm

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB9804275A GB2334849B (en)	1998-02-27	1998-02-27	The double diaphragm

Publications (3)

Publication Number	Publication Date
GB9804275D0 GB9804275D0 (en)	1998-04-22
GB2334849A GB2334849A (en)	1999-09-01
GB2334849B true GB2334849B (en)	2001-02-28

Family

ID=10827761

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB9804275A Expired - Fee Related GB2334849B (en)	1998-02-27	1998-02-27	The double diaphragm

Country Status (1)

Country	Link
GB (1)	GB2334849B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB445935A (en) *	1934-10-17	1936-04-17	Alfred Sidney Evans	An improved sound reproducing device
US4595801A (en) *	1983-10-27	1986-06-17	Ronald Coffin	Coupled dual cone velocity driver speaker
EP0804048A2 (en) *	1996-04-26	1997-10-29	NOKIA TECHNOLOGY GmbH	Loudspeaker
US5701358A (en) *	1994-07-05	1997-12-23	Larsen; John T.	Isobaric loudspeaker

1998
- 1998-02-27 GB GB9804275A patent/GB2334849B/en not_active Expired - Fee Related

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB445935A (en) *	1934-10-17	1936-04-17	Alfred Sidney Evans	An improved sound reproducing device
US4595801A (en) *	1983-10-27	1986-06-17	Ronald Coffin	Coupled dual cone velocity driver speaker
US5701358A (en) *	1994-07-05	1997-12-23	Larsen; John T.	Isobaric loudspeaker
EP0804048A2 (en) *	1996-04-26	1997-10-29	NOKIA TECHNOLOGY GmbH	Loudspeaker

Also Published As

Publication number	Publication date
GB9804275D0 (en)	1998-04-22
GB2334849A (en)	1999-09-01

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Legal Events

Date	Code	Title	Description
2002-10-16	PCNP	Patent ceased through non-payment of renewal fee	Effective date: 20020227