GB2107908A - Electronic warning system - Google Patents
Electronic warning systemInfo
- 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- Withdrawn
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.
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GB08229526A Withdrawn GB2107908A (en) | 1981-02-18 | 1982-02-18 | Electronic warning system |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)
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)
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 |
-
1982
- 1982-02-18 WO PCT/GB1982/000042 patent/WO1982002971A1/en not_active Application Discontinuation
- 1982-02-18 JP JP50062882A patent/JPS58500091A/en active Pending
- 1982-02-18 AU AU81401/82A patent/AU8140182A/en not_active Abandoned
- 1982-02-18 EP EP19820900552 patent/EP0072825A1/en not_active Withdrawn
- 1982-02-18 GB GB08229526A patent/GB2107908A/en not_active Withdrawn
- 1982-10-14 DK DK455582A patent/DK455582A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
WO1982002971A1 (en) | 1982-09-02 |
EP0072825A1 (en) | 1983-03-02 |
AU8140182A (en) | 1982-09-14 |
DK455582A (en) | 1982-10-14 |
JPS58500091A (en) | 1983-01-13 |
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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) |