FI790354A - Brandalarmsystem - Google Patents

Brandalarmsystem

Info

Publication number
FI790354A
FI790354A FI790354A FI790354A FI790354A FI 790354 A FI790354 A FI 790354A FI 790354 A FI790354 A FI 790354A FI 790354 A FI790354 A FI 790354A FI 790354 A FI790354 A FI 790354A
Authority
FI
Finland
Prior art keywords
brandalarmsystem
Prior art date
Application number
FI790354A
Other languages
English (en)
Inventor
Takeo Arima
Akira Furuyama
Original Assignee
Hochiki Co
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
Priority claimed from JP53011311A external-priority patent/JPS5917892B2/ja
Priority claimed from JP1131278A external-priority patent/JPS54104800A/ja
Application filed by Hochiki Co filed Critical Hochiki Co
Publication of FI790354A publication Critical patent/FI790354A/fi

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/353—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of field-effect transistors with internal or external positive feedback
    • H03K3/354—Astable circuits

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire Alarms (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Manipulation Of Pulses (AREA)
FI790354A 1978-02-03 1979-02-02 Brandalarmsystem FI790354A (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP53011311A JPS5917892B2 (ja) 1978-02-03 1978-02-03 マルチバイブレ−タ
JP1131278A JPS54104800A (en) 1978-02-03 1978-02-03 Fire warning device

Publications (1)

Publication Number Publication Date
FI790354A true FI790354A (fi) 1979-08-04

Family

ID=26346722

Family Applications (1)

Application Number Title Priority Date Filing Date
FI790354A FI790354A (fi) 1978-02-03 1979-02-02 Brandalarmsystem

Country Status (3)

Country Link
US (1) US4300132A (fi)
EP (1) EP0003662A3 (fi)
FI (1) FI790354A (fi)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4725993A (en) * 1987-03-20 1988-02-16 Elexis Corporation Device including battery-activated oscillator
IT1262941B (it) * 1992-06-15 1996-07-22 Enichem Spa Procedimento per la separazione di miscele di idrocarburi c8 aromatici
SE523129C2 (sv) * 2001-09-06 2004-03-30 Jan Hjalmarsson Larmanordning innefattande organ för mätning av energiförbrukning och för uppringning
US8899461B2 (en) 2010-10-01 2014-12-02 Covidien Lp Tissue stop for surgical instrument
US10210747B1 (en) * 2018-05-25 2019-02-19 Stephen David Ainsworth Fire alarm testing device and method
CN109580715B (zh) * 2018-11-20 2024-03-12 山西工程技术学院 一种便携式三态瓦斯报警器

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3512106A (en) * 1967-03-17 1970-05-12 Marconi Co Canada Clock oscillator
US3713128A (en) * 1970-08-07 1973-01-23 Systron Donner Corp Vault alarm system and method
US3879717A (en) * 1974-06-19 1975-04-22 K F Ind Inc Portable methane monitor and alarm system
US4037206A (en) * 1975-01-22 1977-07-19 Emhart Industries, Inc. Ionization smoke detector and alarm system
US4004288A (en) * 1975-01-29 1977-01-18 Unitec, Inc. Battery operated fire detection unit
JPS51100085U (fi) * 1975-02-10 1976-08-11
FR2319246A1 (fr) * 1975-07-25 1977-02-18 Hochiki Co Circuit oscillateur
US4030086A (en) * 1975-11-10 1977-06-14 General Electric Company Battery voltage detection and warning means
US4083037A (en) * 1975-12-08 1978-04-04 Patent Development & Management Company Detection circuit
US4017852A (en) * 1976-06-24 1977-04-12 Honeywell Inc. Apparatus for supervising leads interconnecting a plurality of self-contained abnormal condition sensing and alarm annunciating units
JPS5318377A (en) * 1976-08-03 1978-02-20 Toshiba Corp Logical operation circuit
US4091363A (en) * 1977-01-03 1978-05-23 Pittway Corporation Self-contained fire detector with interconnection circuitry

Also Published As

Publication number Publication date
US4300132A (en) 1981-11-10
EP0003662A3 (en) 1979-09-05
EP0003662A2 (en) 1979-08-22

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