GB9820644D0 - Public address apparatus - Google Patents

Public address apparatus

Info

Publication number
GB9820644D0
GB9820644D0 GBGB9820644.4A GB9820644A GB9820644D0 GB 9820644 D0 GB9820644 D0 GB 9820644D0 GB 9820644 A GB9820644 A GB 9820644A GB 9820644 D0 GB9820644 D0 GB 9820644D0
Authority
GB
United Kingdom
Prior art keywords
sounders
pulse
public address
played
address apparatus
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.)
Ceased
Application number
GBGB9820644.4A
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.)
Vimpex Ltd
Original Assignee
Vimpex 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 Vimpex Ltd filed Critical Vimpex Ltd
Priority to GBGB9820644.4A priority Critical patent/GB9820644D0/en
Publication of GB9820644D0 publication Critical patent/GB9820644D0/en
Priority to JP2000571715A priority patent/JP2002526007A/en
Priority to DE69923203T priority patent/DE69923203T2/en
Priority to EP99949117A priority patent/EP1123637B1/en
Priority to AT99949117T priority patent/ATE287193T1/en
Priority to PCT/GB1999/003141 priority patent/WO2000018188A2/en
Priority to AU62112/99A priority patent/AU6211299A/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00—Public address systems

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Fire Alarms (AREA)
  • Alarm Systems (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Meter Arrangements (AREA)
  • Massaging Devices (AREA)
  • Prepayment Telephone Systems (AREA)

Abstract

A public address apparatus comprises a number of sounders each provided with storage means in order to store a number of pre-recorded messages. A central control unit is also provided arranged to send control signals to each of the sounders, the control signals comprising an initial synchronisation and calibration pulse, followed by a second pulse of variable duration. The duration of the second pulse is used to indicate which of the pre-recorded messages to be played in response to at least one detector which provides an input to the central control unit. The arrangement has the advantage that synchronisation of the messages played by each of the sounders can be ensured.
GBGB9820644.4A 1998-09-22 1998-09-22 Public address apparatus Ceased GB9820644D0 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GBGB9820644.4A GB9820644D0 (en) 1998-09-22 1998-09-22 Public address apparatus
JP2000571715A JP2002526007A (en) 1998-09-22 1999-09-21 Public broadcasting equipment
DE69923203T DE69923203T2 (en) 1998-09-22 1999-09-21 SOUND SYSTEM
EP99949117A EP1123637B1 (en) 1998-09-22 1999-09-21 Public address apparatus
AT99949117T ATE287193T1 (en) 1998-09-22 1999-09-21 PA SYSTEM
PCT/GB1999/003141 WO2000018188A2 (en) 1998-09-22 1999-09-21 Public address apparatus
AU62112/99A AU6211299A (en) 1998-09-22 1999-09-21 Public address apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9820644.4A GB9820644D0 (en) 1998-09-22 1998-09-22 Public address apparatus

Publications (1)

Publication Number Publication Date
GB9820644D0 true GB9820644D0 (en) 1998-11-18

Family

ID=10839280

Family Applications (1)

Application Number Title Priority Date Filing Date
GBGB9820644.4A Ceased GB9820644D0 (en) 1998-09-22 1998-09-22 Public address apparatus

Country Status (7)

Country Link
EP (1) EP1123637B1 (en)
JP (1) JP2002526007A (en)
AT (1) ATE287193T1 (en)
AU (1) AU6211299A (en)
DE (1) DE69923203T2 (en)
GB (1) GB9820644D0 (en)
WO (1) WO2000018188A2 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858195A (en) * 1973-08-28 1974-12-31 Jab Co Inc Audio alarm system
DE2533330C3 (en) * 1975-07-25 1981-08-13 Siemens AG, 1000 Berlin und 8000 München Method and device for the transmission of measured values in a fire alarm system
ATE30646T1 (en) * 1983-10-17 1987-11-15 Cerberus Ag METHOD OF ALARM SIGNALING AND EQUIPMENT FOR APPLYING THE SAME.
US5887067A (en) * 1996-05-10 1999-03-23 General Signal Corporation Audio communication system for a life safety network

Also Published As

Publication number Publication date
DE69923203D1 (en) 2005-02-17
DE69923203T2 (en) 2005-12-29
WO2000018188A3 (en) 2000-06-08
ATE287193T1 (en) 2005-01-15
JP2002526007A (en) 2002-08-13
WO2000018188A2 (en) 2000-03-30
AU6211299A (en) 2000-04-10
EP1123637B1 (en) 2005-01-12
EP1123637A2 (en) 2001-08-16

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Legal Events

Date Code Title Description
AT Applications terminated before publication under section 16(1)