GB2107908A - Electronic warning system - Google Patents

Electronic warning system

Info

Publication number
GB2107908A
GB2107908A GB08229526A GB8229526A GB2107908A GB 2107908 A GB2107908 A GB 2107908A GB 08229526 A GB08229526 A GB 08229526A GB 8229526 A GB8229526 A GB 8229526A GB 2107908 A GB2107908 A GB 2107908A
Authority
GB
United Kingdom
Prior art keywords
level
warning system
loudspeaker
adjust
electronic warning
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.)
Withdrawn
Application number
GB08229526A
Inventor
Anthony Roland Coppen
Roger Force
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.)
Blue Circle Industries PLC
Original Assignee
Blue Circle Industries PLC
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 Blue Circle Industries PLC filed Critical Blue Circle Industries PLC
Publication of GB2107908A publication Critical patent/GB2107908A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B27/00—Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations

Abstract

An electronic warning system comprises a signal generator, a power amplifier and at least one loudspeaker. Means may be provided to adjust the overall acoustic output of the amplifier, to adjust the level of each loudspeaker and to vary the overall level with the time of day. A plurality of loudspeakers, which are preferably directional, can be arranged to operate sequentially by means of a multiplexing operation. The system can give audible warning of the imminent start-up of machinery or plant whilst minimising the noise level at the works or site boundary.
GB08229526A 1981-02-18 1982-02-18 Electronic warning system Withdrawn GB2107908A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8105012 1981-02-18

Publications (1)

Publication Number Publication Date
GB2107908A true GB2107908A (en) 1983-05-05

Family

ID=10519771

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08229526A Withdrawn GB2107908A (en) 1981-02-18 1982-02-18 Electronic warning system

Country Status (6)

Country Link
EP (1) EP0072825A1 (en)
JP (1) JPS58500091A (en)
AU (1) AU8140182A (en)
DK (1) DK455582A (en)
GB (1) GB2107908A (en)
WO (1) WO1982002971A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6362097A (en) * 1986-09-03 1988-03-18 株式会社日立製作所 Automatic voice communicator for plant
AUPM282493A0 (en) * 1993-12-06 1994-01-06 Robert Bosch (Australia) Proprietary Ltd. A siren unit
US5887067A (en) * 1996-05-10 1999-03-23 General Signal Corporation Audio communication system for a life safety network

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579233A (en) * 1969-01-27 1971-05-18 Bullard Co Ambient noise frequency responsive audible vehicle alarm
US3683346A (en) * 1971-03-01 1972-08-08 Charles A Horton Variable-tone electronic alarm system
US3739278A (en) * 1971-06-29 1973-06-12 Gautney & Jones Receiver demuting arrangement employing sequential binary code
FR2413730A1 (en) * 1977-12-28 1979-07-27 Accumulateurs Fixes ELECTRONIC HORN CONTROL DEVICE

Also Published As

Publication number Publication date
WO1982002971A1 (en) 1982-09-02
AU8140182A (en) 1982-09-14
EP0072825A1 (en) 1983-03-02
JPS58500091A (en) 1983-01-13
DK455582A (en) 1982-10-14

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)