GB1397158A - Detector - Google Patents

Detector

Info

Publication number
GB1397158A
GB1397158A GB1889273A GB1889273A GB1397158A GB 1397158 A GB1397158 A GB 1397158A GB 1889273 A GB1889273 A GB 1889273A GB 1889273 A GB1889273 A GB 1889273A GB 1397158 A GB1397158 A GB 1397158A
Authority
GB
United Kingdom
Prior art keywords
sensor
along
housing
april
travel
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
GB1889273A
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.)
PAK CONSTRUCTION AB
Original Assignee
PAK CONSTRUCTION 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 PAK CONSTRUCTION AB filed Critical PAK CONSTRUCTION AB
Publication of GB1397158A publication Critical patent/GB1397158A/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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/58—Pipe-line systems
    • A62C35/60—Pipe-line systems wet, i.e. containing extinguishing material even when not in use
    • A62C35/605—Pipe-line systems wet, i.e. containing extinguishing material even when not in use operating and sounding alarm automatically
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/04—Fire prevention, containment or extinguishing specially adapted for particular objects or places for dust or loosely-baled or loosely-piled materials, e.g. in silos, in chimneys

Abstract

1397158 Detecting hot-particles PAK CONSTRUCTION AB 19 April 1973 [24 April 1972] 18892/73 Heading G1A The invention relates to the detection of hot or glowing particles in e.g. a cellulose fibre drying plant. Fibres are transported by gas flow through a conduit 10 past a photo-electric sensor 12 having two or more cells with separate fields of view along the line of travel. Signals from the sensor are fed through a pulse responsive circuit 34, filter 38, shaper 40 to a counter 42, which is periodically reset automatically. A full count within the period operates an alarm 44 indicating risk of fire and may shut-down the plant. SENSOR CONSTRUCTION Fig. 2 comprises a housing 12 having six chambers 18 along the path of travel and containing photo-sensitive elements 26. Slits 24 in the housing enable each element to view a separate successive area such as 32, 32<SP>1</SP>, along the path 33. A transparent "dust cover" 25 is provided. In alternative constructions only two or three sensing elements are provided in a hemi-spherical housing Figs. 3, 4 (not shown). The sensor may be responsive to infrared only.
GB1889273A 1972-04-24 1973-04-19 Detector Expired GB1397158A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE05380/72A SE364588B (en) 1972-04-24 1972-04-24

Publications (1)

Publication Number Publication Date
GB1397158A true GB1397158A (en) 1975-06-11

Family

ID=20266340

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1889273A Expired GB1397158A (en) 1972-04-24 1973-04-19 Detector

Country Status (8)

Country Link
US (1) US3824392A (en)
DE (1) DE2319033C3 (en)
DK (1) DK142735B (en)
FI (1) FI60615C (en)
FR (1) FR2182486A5 (en)
GB (1) GB1397158A (en)
NO (1) NO131525C (en)
SE (1) SE364588B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2269011A (en) * 1992-07-24 1994-01-26 Bridisco Ltd A PIR sensor device.

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3896311A (en) * 1974-01-02 1975-07-22 Minnesota Mining & Mfg Pyroelectric motion and temperature sensitive infrared detector with conductive fingers
US3958118A (en) * 1975-02-03 1976-05-18 Security Organization Supreme-Sos-Inc. Intrusion detection devices employing multiple scan zones
DE2852971C2 (en) * 1978-12-07 1985-02-14 Preussag Ag Feuerschutz, 2060 Bad Oldesloe Fire alarm
JPS57125496A (en) * 1981-01-27 1982-08-04 Fujitec Kk Condition detector
US4520343A (en) * 1980-12-16 1985-05-28 Hiroshi Koh Lift control system
US5196689A (en) * 1990-10-16 1993-03-23 Pioneer Electronic Corporation Device for detecting an object including a light-sensitive detecting array
SE501123C2 (en) * 1993-10-08 1994-11-21 Firefly Ab detector arrangement
US5548276A (en) 1993-11-30 1996-08-20 Alan E. Thomas Localized automatic fire extinguishing apparatus
USRE39081E1 (en) * 1993-11-30 2006-05-02 Alan E. Thomas Localized automatic fire extinguishing apparatus
SE515579C2 (en) * 1998-12-29 2001-09-03 Firefly Ab Detector arrangement for detecting particles that may cause fire or explosion in a particle stream
DE10249743A1 (en) * 2002-10-25 2004-05-06 Forschungsgesellschaft für angewandte Systemsicherheit und Arbeitsmedizin e.V. Device for detecting smoldering nests
EP2244237B1 (en) 2009-04-21 2012-07-04 Minimax GmbH & Co. KG Device for recognising and reporting sparks of combustible materials
US9162095B2 (en) 2011-03-09 2015-10-20 Alan E. Thomas Temperature-based fire detection
EP2881719B1 (en) * 2013-12-03 2024-03-20 Atexon Oy Detecting of sparks
SE541656C2 (en) * 2018-02-23 2019-11-19 Firefly Ab Monitoring of particle temperature trends
SE541639C2 (en) * 2018-02-23 2019-11-19 Firefly Ab Determination of risk level for particles

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2016036A (en) * 1932-02-04 1935-10-01 Gerald Alan S Fits Photo-electric system
US2198725A (en) * 1937-12-09 1940-04-30 Hammond V Hayes Alarm system
US2653309A (en) * 1950-03-09 1953-09-22 Gen Electric Object detection
US2931913A (en) * 1953-01-02 1960-04-05 Jr Geary A Long Radiation receiver
US2774961A (en) * 1954-08-30 1956-12-18 Orlando Carl Moving object indicator
US3036219A (en) * 1958-05-01 1962-05-22 Arthur V Thompson Passive radiation proximity detector
US3727057A (en) * 1962-06-15 1973-04-10 Westinghouse Electric Corp Infrared detector device with a mosaic of oppositely-poled adjacent elements
US3480775A (en) * 1964-08-17 1969-11-25 Gen Dynamics Corp Radiation sensitive omnidirectional motion detector system
US3399307A (en) * 1965-05-20 1968-08-27 Bell & Howell Co Motion sensing exposure system for optical instruments

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2269011A (en) * 1992-07-24 1994-01-26 Bridisco Ltd A PIR sensor device.
GB2269011B (en) * 1992-07-24 1996-05-01 Bridisco Ltd A pir sensor device

Also Published As

Publication number Publication date
NO131525C (en) 1975-06-11
DE2319033B2 (en) 1977-09-22
FR2182486A5 (en) 1973-12-07
US3824392A (en) 1974-07-16
DE2319033C3 (en) 1978-05-11
FI60615B (en) 1981-10-30
DK142735B (en) 1981-01-05
DK142735C (en) 1981-08-10
NO131525B (en) 1975-03-03
SE364588B (en) 1974-02-25
DE2319033A1 (en) 1973-11-15
FI60615C (en) 1982-02-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19930418