GB1499581A - Fire detector - Google Patents

Fire detector

Info

Publication number
GB1499581A
GB1499581A GB17175A GB17175A GB1499581A GB 1499581 A GB1499581 A GB 1499581A GB 17175 A GB17175 A GB 17175A GB 17175 A GB17175 A GB 17175A GB 1499581 A GB1499581 A GB 1499581A
Authority
GB
United Kingdom
Prior art keywords
transistor
voltage
conductive
horn
potentiometer
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
GB17175A
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.)
Pittway Corp
Original Assignee
Pittway Corp
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 Pittway Corp filed Critical Pittway Corp
Publication of GB1499581A publication Critical patent/GB1499581A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/181—Prevention or correction of operating errors due to failing power supply
    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)
  • Alarm Systems (AREA)
GB17175A 1974-01-07 1975-01-03 Fire detector Expired GB1499581A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US43113774A 1974-01-07 1974-01-07

Publications (1)

Publication Number Publication Date
GB1499581A true GB1499581A (en) 1978-02-01

Family

ID=23710644

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17175A Expired GB1499581A (en) 1974-01-07 1975-01-03 Fire detector

Country Status (5)

Country Link
JP (1) JPS5726398B2 (enExample)
DE (1) DE2500435A1 (enExample)
FR (1) FR2257119B3 (enExample)
GB (1) GB1499581A (enExample)
IT (1) IT1023231B (enExample)

Also Published As

Publication number Publication date
FR2257119A1 (enExample) 1975-08-01
DE2500435A1 (de) 1975-07-17
FR2257119B3 (enExample) 1977-07-22
JPS5726398B2 (enExample) 1982-06-04
IT1023231B (it) 1978-05-10
JPS50103300A (enExample) 1975-08-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee