WO2000018188A3 - Public address apparatus - Google Patents

Public address apparatus Download PDF

Info

Publication number
WO2000018188A3
WO2000018188A3 PCT/GB1999/003141 GB9903141W WO0018188A3 WO 2000018188 A3 WO2000018188 A3 WO 2000018188A3 GB 9903141 W GB9903141 W GB 9903141W WO 0018188 A3 WO0018188 A3 WO 0018188A3
Authority
WO
WIPO (PCT)
Prior art keywords
sounders
pulse
public address
played
address apparatus
Prior art date
Application number
PCT/GB1999/003141
Other languages
French (fr)
Other versions
WO2000018188A2 (en
Inventor
Adrian Heddle
Original Assignee
Vimpex Limited
Adrian Heddle
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 Limited, Adrian Heddle filed Critical Vimpex Limited
Priority to EP99949117A priority Critical patent/EP1123637B1/en
Priority to DE69923203T priority patent/DE69923203T2/en
Priority to JP2000571715A priority patent/JP2002526007A/en
Priority to AU62112/99A priority patent/AU6211299A/en
Priority to AT99949117T priority patent/ATE287193T1/en
Publication of WO2000018188A2 publication Critical patent/WO2000018188A2/en
Publication of WO2000018188A3 publication Critical patent/WO2000018188A3/en

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)
  • Prepayment Telephone Systems (AREA)
  • Meter Arrangements (AREA)
  • Massaging Devices (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.
PCT/GB1999/003141 1998-09-22 1999-09-21 Public address apparatus WO2000018188A2 (en)

Priority Applications (5)

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

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9820644.4 1998-09-22
GBGB9820644.4A GB9820644D0 (en) 1998-09-22 1998-09-22 Public address apparatus

Publications (2)

Publication Number Publication Date
WO2000018188A2 WO2000018188A2 (en) 2000-03-30
WO2000018188A3 true WO2000018188A3 (en) 2000-06-08

Family

ID=10839280

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1999/003141 WO2000018188A2 (en) 1998-09-22 1999-09-21 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)

Citations (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
FR2319165A1 (en) * 1975-07-25 1977-02-18 Siemens Ag Transmission system for measured values in fire alarm system - with delay time preceding transmission characterising each detector (BE240177)
EP0141987A2 (en) * 1983-10-17 1985-05-22 Cerberus Ag Alarm signalling method and application device therefor
EP0806750A1 (en) * 1996-05-10 1997-11-12 General Signal Corporation Audio communication system for a life safety network

Patent Citations (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
FR2319165A1 (en) * 1975-07-25 1977-02-18 Siemens Ag Transmission system for measured values in fire alarm system - with delay time preceding transmission characterising each detector (BE240177)
EP0141987A2 (en) * 1983-10-17 1985-05-22 Cerberus Ag Alarm signalling method and application device therefor
EP0806750A1 (en) * 1996-05-10 1997-11-12 General Signal Corporation Audio communication system for a life safety network

Also Published As

Publication number Publication date
EP1123637B1 (en) 2005-01-12
DE69923203D1 (en) 2005-02-17
WO2000018188A2 (en) 2000-03-30
EP1123637A2 (en) 2001-08-16
ATE287193T1 (en) 2005-01-15
GB9820644D0 (en) 1998-11-18
JP2002526007A (en) 2002-08-13
DE69923203T2 (en) 2005-12-29
AU6211299A (en) 2000-04-10

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