GB2023869A - Light guide which cannot be transversed disruptively by flames - Google Patents

Light guide which cannot be transversed disruptively by flames

Info

Publication number
GB2023869A
GB2023869A GB7918938A GB7918938A GB2023869A GB 2023869 A GB2023869 A GB 2023869A GB 7918938 A GB7918938 A GB 7918938A GB 7918938 A GB7918938 A GB 7918938A GB 2023869 A GB2023869 A GB 2023869A
Authority
GB
United Kingdom
Prior art keywords
disruptively
transversed
flames
risk
light guide
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Withdrawn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
GB7918938A
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.)
Hectronic AG
Original Assignee
Hectronic AG
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 Hectronic AG filed Critical Hectronic AG
Publication of GB2023869A publication Critical patent/GB2023869A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2476—Non-optical details, e.g. housings, mountings, supports
    • G02B23/2484—Arrangements in relation to a camera or imaging device
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4415—Cables for special applications
    • G02B6/4427—Pressure resistant cables, e.g. undersea cables
    • G02B6/4428—Penetrator systems in pressure-resistant devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Astronomy & Astrophysics (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

Light guides which cannot be transversed disruptively by flames are necessary for optic and/or optoelectric surveillance, for example of magnitudes of physical and chemical nature with processes in regions where there is a risk of explosion. For this purpose, each light guide in the risk region is made of a single fiber within its proper longitudinal opening, sufficiently small, and is then vented, without support, in a region with no risk or with lesser risks. As an alternative, an economic technical form of execution, small tubes (11a, 11b) are used longer than 25 mm and preferably with a 6 mm bore. In another alternative, the light guides are casted in the openings (12a, 12b).
GB7918938A 1977-10-05 1978-10-02 Light guide which cannot be transversed disruptively by flames Withdrawn GB2023869A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1216577 1977-10-05

Publications (1)

Publication Number Publication Date
GB2023869A true GB2023869A (en) 1980-01-03

Family

ID=4380493

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7918938A Withdrawn GB2023869A (en) 1977-10-05 1978-10-02 Light guide which cannot be transversed disruptively by flames

Country Status (8)

Country Link
DE (1) DE2857094D2 (en)
FR (1) FR2405489A1 (en)
GB (1) GB2023869A (en)
IT (1) IT1099238B (en)
NL (1) NL7809900A (en)
SE (1) SE7904845L (en)
WO (1) WO1979000179A1 (en)
ZA (1) ZA785381B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2244816A (en) * 1990-04-10 1991-12-11 Microphax Limited Illumination apparatus for a microfiche reader

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520124B1 (en) * 1982-01-21 1988-02-26 Silec Liaisons Elec EXPLOSION-PROOF EXPLOSION BULKHEAD HOUSING ELEMENT FOR FIBER OPTICS
DE3233234A1 (en) * 1982-09-07 1984-03-08 Siemens AG, 1000 Berlin und 8000 München PRESSURE-RESISTANT AND GAS-TIGHT LIGHTWAVE GUIDE
FR2546308B1 (en) * 1983-05-20 1986-08-01 Lignes Telegraph Telephon WATERPROOF FITTING FOR OPTICAL FIBERS
DE4038248A1 (en) * 1990-11-30 1992-06-04 Hansen & Reinders Gmbh & Co Be Pressure-resistant feedthrough assembly for optical fibres - has slits formed in cylindrical body for insertion into bore in pressure-tight housing
DE19756876A1 (en) * 1997-12-19 1999-04-15 Siemens Ag Optical data transmission port especially for a reactor safety vessel

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3051035A (en) * 1960-05-17 1962-08-28 American Optical Corp Flexible pyroscopes
FR1534959A (en) * 1967-06-23 1968-08-02 Commissariat Energie Atomique Interior vacuum light conductors
US3552821A (en) * 1967-09-05 1971-01-05 Exxon Research Engineering Co Borescope for use at high temperatures and pressures
US3618526A (en) * 1969-09-26 1971-11-09 Us Navy Pyrotechnic pumped laser for remote ordnance initiation system
US3690775A (en) * 1971-09-01 1972-09-12 Avco Corp Borescope fixture
US3825320A (en) * 1973-03-02 1974-07-23 Us Navy High-pressure optical bulkhead penetrator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2244816A (en) * 1990-04-10 1991-12-11 Microphax Limited Illumination apparatus for a microfiche reader

Also Published As

Publication number Publication date
ZA785381B (en) 1979-09-26
DE2857094D2 (en) 1980-11-20
FR2405489A1 (en) 1979-05-04
NL7809900A (en) 1979-04-09
WO1979000179A1 (en) 1979-04-19
IT1099238B (en) 1985-09-18
SE7904845L (en) 1979-06-01
IT7828445A0 (en) 1978-10-05

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)