GB2082813B - Audible warning system - Google Patents

Audible warning system

Info

Publication number: GB2082813B
Authority: GB; United Kingdom
Prior art keywords: warning system; audible warning; audible; warning
Prior art date: 1980-08-02
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

GB8122840A

Other versions

GB2082813A (en

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.)

PRODUCTION ENG RES

Original Assignee

PRODUCTION ENG RES

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.)

1980-08-02

Filing date

1981-07-24

Publication date

1984-01-04

1981-07-24 Application filed by PRODUCTION ENG RES filed Critical PRODUCTION ENG RES

1982-03-10 Publication of GB2082813A publication Critical patent/GB2082813A/en

1984-01-04 Application granted granted Critical

1984-01-04 Publication of GB2082813B publication Critical patent/GB2082813B/en

Status Expired 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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

Physics & Mathematics (AREA)
Electromagnetism (AREA)
General Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Alarm Systems (AREA)

GB8122840A 1980-08-02 1981-07-24 Audible warning system Expired GB2082813B (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GB8025310		1980-08-02
GB8112691		1981-04-24

Publications (2)

Publication Number	Publication Date
GB2082813A GB2082813A (en)	1982-03-10
GB2082813B true GB2082813B (en)	1984-01-04

Family

ID=26276435

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB8122840A Expired GB2082813B (en)	1980-08-02	1981-07-24	Audible warning system

Country Status (1)

Country	Link
GB (1)	GB2082813B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102005054586A1 (en) *	2005-11-16	2007-05-24	Robert Bosch Gmbh	Sound system, method for generating spatial sound images and software
GB2457307A (en)	2008-02-11	2009-08-12	Apollo Fire Detectors Ltd	Fire alarm signalling with voice modulated HF signal multiplexed on to plateaus of existing lower frequency pulses carried on power cabling

1981
- 1981-07-24 GB GB8122840A patent/GB2082813B/en not_active Expired

Also Published As

Publication number	Publication date
GB2082813A (en)	1982-03-10

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Legal Events

Date	Code	Title	Description
1983-04-20	732	Registration of transactions, instruments or events in the register (sect. 32/1977)
1989-03-15	PCNP	Patent ceased through non-payment of renewal fee