EP0290412A3 - A measuring head for detection of particles - Google Patents

A measuring head for detection of particles Download PDF

Info

Publication number
EP0290412A3
EP0290412A3 EP88850155A EP88850155A EP0290412A3 EP 0290412 A3 EP0290412 A3 EP 0290412A3 EP 88850155 A EP88850155 A EP 88850155A EP 88850155 A EP88850155 A EP 88850155A EP 0290412 A3 EP0290412 A3 EP 0290412A3
Authority
EP
European Patent Office
Prior art keywords
holes
holder
measuring path
ventilation duct
measuring head
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.)
Withdrawn
Application number
EP88850155A
Other languages
German (de)
French (fr)
Other versions
EP0290412A2 (en
Inventor
Curt Lindmark
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.)
Diantek AB
Original Assignee
Diantek AB
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 Diantek AB filed Critical Diantek AB
Publication of EP0290412A2 publication Critical patent/EP0290412A2/en
Publication of EP0290412A3 publication Critical patent/EP0290412A3/en
Withdrawn legal-status Critical Current

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
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • 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
    • G08B17/113—Constructional details

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

A measuring head, e.g. for a smoke detector, includes a tubular holder (1) intended for being disposed in a ventilation duct for being passed through by the air which is to be monitored. The portion of the holder to be introduced in the ventilation duct is ended by an optical reflector (6) defining one end of a measuring path while the opposite defining surface of the measuring path includes a beam transmitting means and a detector means. The peripheral surface of the holder around the measuring path has a number, preferably six, of rows of holes (2) with at least six holes in each row. The holes in a row are staggered relative the holes in adjacent rows, the staggering amounting to between 1/4 and 1/3 of the hole width. At least 1/4 of the peripheral surface of the holder introduced in the ventilation duct and surrounding the measuring path is covered by the holes.
EP88850155A 1987-05-06 1988-05-06 A measuring head for detection of particles Withdrawn EP0290412A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8701873A SE8701873L (en) 1987-05-06 1987-05-06 MEASURING HEAD FOR SMOKE DETECTOR
SE8701873 1987-05-06

Publications (2)

Publication Number Publication Date
EP0290412A2 EP0290412A2 (en) 1988-11-09
EP0290412A3 true EP0290412A3 (en) 1989-05-10

Family

ID=20368437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88850155A Withdrawn EP0290412A3 (en) 1987-05-06 1988-05-06 A measuring head for detection of particles

Country Status (2)

Country Link
EP (1) EP0290412A3 (en)
SE (1) SE8701873L (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103212A (en) * 1989-07-03 1992-04-07 Worcester Polytechnic Institute Balanced fluid flow delivery system
US8077317B2 (en) * 2009-04-09 2011-12-13 Kidde Technologies, Inc. Sensor head for a dry powder agent
US9207172B2 (en) 2011-05-26 2015-12-08 Kidde Technologies, Inc. Velocity survey with powderizer and agent flow indicator
US11493229B2 (en) 2019-03-20 2022-11-08 Carrier Corporation Chamberless wide area duct smoke detector
US11850458B2 (en) 2021-04-19 2023-12-26 Kidde Technologies, Inc. Flow control device for particle concentration measurement sensor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE699466C (en) * 1937-06-29 1940-11-29 Minimax Akt Ges Smoke alarm device
GB636341A (en) * 1947-04-08 1950-04-26 Trist & Co Ltd Ronald Improvements relating to electrically actuated detection or warning systems
CH567262A5 (en) * 1974-05-20 1975-09-30 Cerberus Ag Extinction detector with electromagnetic radiation source - has radiation penetrating medium under analysis
US4294124A (en) * 1980-04-10 1981-10-13 Air Products And Chemicals, Inc. Apparatus for extraction of materials from operating pressurized vessels

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE699466C (en) * 1937-06-29 1940-11-29 Minimax Akt Ges Smoke alarm device
GB636341A (en) * 1947-04-08 1950-04-26 Trist & Co Ltd Ronald Improvements relating to electrically actuated detection or warning systems
CH567262A5 (en) * 1974-05-20 1975-09-30 Cerberus Ag Extinction detector with electromagnetic radiation source - has radiation penetrating medium under analysis
US4294124A (en) * 1980-04-10 1981-10-13 Air Products And Chemicals, Inc. Apparatus for extraction of materials from operating pressurized vessels

Also Published As

Publication number Publication date
SE8701873L (en) 1988-11-07
SE8701873D0 (en) 1987-05-06
EP0290412A2 (en) 1988-11-09

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