ATE287193T1 - PA SYSTEM - Google Patents

PA SYSTEM

Info

Publication number
ATE287193T1
ATE287193T1 AT99949117T AT99949117T ATE287193T1 AT E287193 T1 ATE287193 T1 AT E287193T1 AT 99949117 T AT99949117 T AT 99949117T AT 99949117 T AT99949117 T AT 99949117T AT E287193 T1 ATE287193 T1 AT E287193T1
Authority
AT
Austria
Prior art keywords
sounders
pulse
played
control unit
messages
Prior art date
Application number
AT99949117T
Other languages
German (de)
Inventor
Adrian Heddle
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
Application granted granted Critical
Publication of ATE287193T1 publication Critical patent/ATE287193T1/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00Public 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.
AT99949117T 1998-09-22 1999-09-21 PA SYSTEM ATE287193T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9820644.4A GB9820644D0 (en) 1998-09-22 1998-09-22 Public address apparatus
PCT/GB1999/003141 WO2000018188A2 (en) 1998-09-22 1999-09-21 Public address apparatus

Publications (1)

Publication Number Publication Date
ATE287193T1 true ATE287193T1 (en) 2005-01-15

Family

ID=10839280

Family Applications (1)

Application Number Title Priority Date Filing Date
AT99949117T ATE287193T1 (en) 1998-09-22 1999-09-21 PA SYSTEM

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
EP1123637B1 (en) 2005-01-12
DE69923203D1 (en) 2005-02-17
WO2000018188A2 (en) 2000-03-30
EP1123637A2 (en) 2001-08-16
WO2000018188A3 (en) 2000-06-08
GB9820644D0 (en) 1998-11-18
JP2002526007A (en) 2002-08-13
DE69923203T2 (en) 2005-12-29
AU6211299A (en) 2000-04-10

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Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties