GB1253196A - - Google Patents

Info

Publication number: GB1253196A
Authority: GB; United Kingdom
Prior art keywords: ionization; march; current; cerberus; heading
Prior art date: 1969-03-27
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

Other languages

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.)

1969-03-27

Filing date

1970-03-26

Publication date

1971-11-10

1970-03-26 Application filed filed Critical

1971-11-10 Publication of GB1253196A publication Critical patent/GB1253196A/en

Status Expired legal-status Critical Current

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

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)

GB1253196D 1969-03-27 1970-03-26 Expired GB1253196A (xx)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CH462969A CH489070A (de)	1969-03-27	1969-03-27	Ionisationsfeuermelder

Publications (1)

Publication Number	Publication Date
GB1253196A true GB1253196A (xx)	1971-11-10

Family

ID=4279695

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB1253196D Expired GB1253196A (xx)	1969-03-27	1970-03-26

Country Status (4)

Country	Link
US (1)	US3714641A (xx)
CH (1)	CH489070A (xx)
DE (1)	DE2011329A1 (xx)
GB (1)	GB1253196A (xx)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4023152A (en) *	1973-10-01	1977-05-10	Matsushita Electric Works, Ltd.	Ionization type smoke sensing device
CH586941A5 (xx) *	1975-07-25	1977-04-15	Cerberus Ag
ZA786519B (en) *	1978-11-20	1980-02-27	Anglo Amer Corp South Africa	Detector
CA1148279A (en) *	1979-12-14	1983-06-14	Andreas Scheidweiler	Ionization smoke detector with increased operational reliability
WO2008034080A2 (en) *	2006-09-15	2008-03-20	Nano-Proprietary, Inc.	Smoke detector

1969
- 1969-03-27 CH CH462969A patent/CH489070A/de not_active IP Right Cessation
1970
- 1970-03-10 DE DE19702011329 patent/DE2011329A1/de active Pending
- 1970-03-13 US US00019242A patent/US3714641A/en not_active Expired - Lifetime
- 1970-03-26 GB GB1253196D patent/GB1253196A/en not_active Expired

Also Published As

Publication number	Publication date
DE2011329A1 (de)	1971-06-03
CH489070A (de)	1970-04-15
US3714641A (en)	1973-01-30

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Legal Events

Date	Code	Title	Description
1972-03-22	PS	Patent sealed [section 19, patents act 1949]
1983-11-16	PCNP	Patent ceased through non-payment of renewal fee