DE2029752B2 - Ionisations rauchmelder - Google Patents

Ionisations rauchmelder

Info

Publication number
DE2029752B2
DE2029752B2 DE19702029752 DE2029752A DE2029752B2 DE 2029752 B2 DE2029752 B2 DE 2029752B2 DE 19702029752 DE19702029752 DE 19702029752 DE 2029752 A DE2029752 A DE 2029752A DE 2029752 B2 DE2029752 B2 DE 2029752B2
Authority
DE
Germany
Prior art keywords
field effect
effect transistor
ionization
voltage
smoke detector
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.)
Granted
Application number
DE19702029752
Other languages
German (de)
English (en)
Other versions
DE2029752A1 (de
Inventor
Sasaki Tokio; Akihiro Kobayashi Fujisawa; Naoki Takahashi Yokohama; Kanagawa; Koju (Japan). G08b 17-06
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.)
Nittan Co Ltd
Original Assignee
Nittan Co 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 Nittan Co Ltd filed Critical Nittan Co Ltd
Publication of DE2029752A1 publication Critical patent/DE2029752A1/de
Publication of DE2029752B2 publication Critical patent/DE2029752B2/de
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
DE19702029752 1969-06-16 1970-06-16 Ionisations rauchmelder Granted DE2029752B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4688769 1969-06-16
JP4688669 1969-06-16

Publications (2)

Publication Number Publication Date
DE2029752A1 DE2029752A1 (de) 1971-01-07
DE2029752B2 true DE2029752B2 (de) 1971-12-02

Family

ID=26387034

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19702029752 Granted DE2029752B2 (de) 1969-06-16 1970-06-16 Ionisations rauchmelder

Country Status (9)

Country Link
US (1) US3718919A (https=)
AT (1) AT301398B (https=)
DE (1) DE2029752B2 (https=)
ES (1) ES378081A1 (https=)
FR (1) FR2054574B1 (https=)
GB (1) GB1254839A (https=)
IL (1) IL34107A (https=)
NL (1) NL150595B (https=)
SE (1) SE348576B (https=)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2130445C3 (de) * 1971-06-19 1981-06-04 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung für zur Meldung und Signalisierung dienende Linienstromkreise
US4020415A (en) * 1974-12-30 1977-04-26 Unitec, Inc. Combustion product indicator
USRE30117E (en) * 1975-07-25 1979-10-16 Cerberus Ag Ionization-type fire or smoke sensing system
CH586941A5 (https=) * 1975-07-25 1977-04-15 Cerberus Ag
US4083037A (en) * 1975-12-08 1978-04-04 Patent Development & Management Company Detection circuit

Also Published As

Publication number Publication date
FR2054574A1 (https=) 1971-04-23
IL34107A0 (en) 1970-05-21
SE348576B (https=) 1972-09-04
GB1254839A (en) 1971-11-24
NL150595B (nl) 1976-08-16
FR2054574B1 (https=) 1973-03-16
DE2029752A1 (de) 1971-01-07
US3718919A (en) 1973-02-27
NL7004720A (https=) 1970-12-18
IL34107A (en) 1972-09-28
AT301398B (de) 1972-09-11
ES378081A1 (es) 1972-12-01

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
8339 Ceased/non-payment of the annual fee