DE3474606D1 - Method of determining the break-through of a uv tube and device for carrying out the method - Google Patents

Method of determining the break-through of a uv tube and device for carrying out the method

Info

Publication number
DE3474606D1
DE3474606D1 DE8484100825T DE3474606T DE3474606D1 DE 3474606 D1 DE3474606 D1 DE 3474606D1 DE 8484100825 T DE8484100825 T DE 8484100825T DE 3474606 T DE3474606 T DE 3474606T DE 3474606 D1 DE3474606 D1 DE 3474606D1
Authority
DE
Germany
Prior art keywords
tube
pulses
break
determining
carrying
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
DE8484100825T
Other languages
German (de)
Inventor
H M Loy
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.)
GTE Licht GmbH
Original Assignee
GTE Licht GmbH
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 GTE Licht GmbH filed Critical GTE Licht GmbH
Application granted granted Critical
Publication of DE3474606D1 publication Critical patent/DE3474606D1/en
Expired 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
    • G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

A firing detector compares a sequence of signal pulses obtained from a UV tube with the sameor a lesser number of uniform clock pulses. The clock pulses are obtained from rectangular pulses supplied to the UV tube. Pref. both sets of pulses are fed to a shift register (1) with a corresponding number of shift register stages (A,B,C,D). The outputs of all stages are coupled to respective inputs of an 01D!gate.
DE8484100825T 1984-01-26 1984-01-26 Method of determining the break-through of a uv tube and device for carrying out the method Expired DE3474606D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19840100825 EP0150233B1 (en) 1984-01-26 1984-01-26 Method of determining the break-through of a uv tube and device for carrying out the method

Publications (1)

Publication Number Publication Date
DE3474606D1 true DE3474606D1 (en) 1988-11-17

Family

ID=8191720

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484100825T Expired DE3474606D1 (en) 1984-01-26 1984-01-26 Method of determining the break-through of a uv tube and device for carrying out the method

Country Status (2)

Country Link
EP (1) EP0150233B1 (en)
DE (1) DE3474606D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2199656B (en) * 1987-01-07 1990-10-17 Graviner Ltd Detection of electromagnetic radiation
GB2417771B (en) 2004-09-07 2010-02-17 Kidde Ip Holdings Ltd Improvements in and relating to uv gas discharge tubes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543260A (en) * 1968-07-24 1970-11-24 Honeywell Inc Self checking interuder and fire detector units and system
GB1515116A (en) * 1974-11-05 1978-06-21 Graviner Ltd Methods and apparatus for optimising the response of transducers
US4455487A (en) * 1981-10-30 1984-06-19 Armtec Industries, Inc. Fire detection system with IR and UV ratio detector

Also Published As

Publication number Publication date
EP0150233B1 (en) 1988-10-12
EP0150233A1 (en) 1985-08-07

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee