ES476437A1 - Perfeccionamientos en dispositivos de control de avisadores electronicos - Google Patents

Perfeccionamientos en dispositivos de control de avisadores electronicos

Info

Publication number
ES476437A1
ES476437A1 ES476437A ES476437A ES476437A1 ES 476437 A1 ES476437 A1 ES 476437A1 ES 476437 A ES476437 A ES 476437A ES 476437 A ES476437 A ES 476437A ES 476437 A1 ES476437 A1 ES 476437A1
Authority
ES
Spain
Prior art keywords
electronic warning
clock signal
audio frequency
controlling
warning device
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.)
Expired
Application number
ES476437A
Other languages
English (en)
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.)
SAFT Societe des Accumulateurs Fixes et de Traction SA
Original Assignee
SAFT Societe des Accumulateurs Fixes et de Traction SA
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 SAFT Societe des Accumulateurs Fixes et de Traction SA filed Critical SAFT Societe des Accumulateurs Fixes et de Traction SA
Publication of ES476437A1 publication Critical patent/ES476437A1/es
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems, e.g. audible personal calling systems
    • G08B3/10—Audible signalling systems, e.g. audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)

Abstract

Perfeccionamientos en dispositivos de control de avisadores electrónicos, que comprenden medios para proporcionar señales que tienen una frecuencia audible a un transistor de potencia que ataca el avisador, medios para modular cíclicamente la frecuencia y medios para limitar el tiempo de emisión sonora del avisador, caracterizados porque comprenden medios para proporcionar una base de tiempos precisa y única y medios para dividir la frecuencia de la base de tiempo a fín de obtener la frecuencia audible, el tiempo de conducción del transistor de potencia con respecto a su tiempo de reposo, los intervalos necesarios para la modulación de la frecuencia y la temporización de la duración de emisión sonora del avisador.
ES476437A 1977-12-28 1978-12-28 Perfeccionamientos en dispositivos de control de avisadores electronicos Expired ES476437A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7739468A FR2413730A1 (fr) 1977-12-28 1977-12-28 Dispositif de commande d'un avertisseur electronique

Publications (1)

Publication Number Publication Date
ES476437A1 true ES476437A1 (es) 1979-04-01

Family

ID=9199437

Family Applications (1)

Application Number Title Priority Date Filing Date
ES476437A Expired ES476437A1 (es) 1977-12-28 1978-12-28 Perfeccionamientos en dispositivos de control de avisadores electronicos

Country Status (7)

Country Link
US (1) US4232305A (es)
BE (1) BE872586A (es)
CA (1) CA1106292A (es)
DE (1) DE2855402A1 (es)
ES (1) ES476437A1 (es)
FR (1) FR2413730A1 (es)
GB (1) GB2012094B (es)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4482888A (en) * 1980-11-28 1984-11-13 Tokyo Shibaura Denki Kabushiki Kaisha Alarming apparatus
US4388614A (en) * 1980-12-15 1983-06-14 The United States Of America As Represented By The Secretary Of The Air Force Automatically sequenced signaling system
EP0072825A1 (en) * 1981-02-18 1983-03-02 Blue Circle Industries Plc Electronic warning system
US4644327A (en) * 1982-07-30 1987-02-17 National Research Development Corp. Methods for generating auditory indicators
US4698619A (en) * 1984-05-07 1987-10-06 Honeywell Inc. Variable frequency fire tone generator
GB2222919A (en) * 1988-09-20 1990-03-21 Safety Equipment Public Inc Apparatus and methods for controlling a signal device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7205325A (es) * 1972-04-20 1973-10-23
JPS607235B2 (ja) * 1975-10-28 1985-02-22 セイコーインスツルメンツ株式会社 アラーム電子時計
JPS52123223A (en) * 1976-04-08 1977-10-17 Toshiba Corp Electronic circuit for music box
US4094140A (en) * 1976-08-24 1978-06-13 Hideki Ohue Timepiece-gas lighter assembly
US4100543A (en) * 1977-02-04 1978-07-11 Napco Security Systems, Inc. Audible alarm apparatus particularly adaptable for use with fire and theft security systems

Also Published As

Publication number Publication date
FR2413730B1 (es) 1981-10-30
DE2855402A1 (de) 1979-07-05
CA1106292A (fr) 1981-08-04
GB2012094A (en) 1979-07-18
BE872586A (fr) 1979-06-07
GB2012094B (en) 1982-05-06
US4232305A (en) 1980-11-04
FR2413730A1 (fr) 1979-07-27

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