GB1377683A – Flame detectors
– Google Patents
GB1377683A – Flame detectors
– Google Patents
Flame detectors
Info
Publication number
GB1377683A
GB1377683A
GB998672A
GB998672A
GB1377683A
GB 1377683 A
GB1377683 A
GB 1377683A
GB 998672 A
GB998672 A
GB 998672A
GB 998672 A
GB998672 A
GB 998672A
GB 1377683 A
GB1377683 A
GB 1377683A
Authority
GB
United Kingdom
Prior art keywords
photo
flame
output
signal
cell
Prior art date
1971-03-04
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
GB998672A
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.)
Cerberus AG
Original Assignee
Cerberus 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.)
1971-03-04
Filing date
1972-03-03
Publication date
1974-12-18
1972-03-03
Application filed by Cerberus AG
filed
Critical
Cerberus AG
1974-12-18
Publication of GB1377683A
publication
Critical
patent/GB1377683A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
241000202252
Cerberus
Species
0.000
abstract
1
230000005855
radiation
Effects
0.000
abstract
1
230000035945
sensitivity
Effects
0.000
abstract
1
230000003595
spectral effect
Effects
0.000
abstract
1
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
Abstract
1377683 Photo-electric flame detectors CERBERUS AG 3 March 1972 [4 March 1971] 9986/72 Heading G1A [Also in Divisions F4 and G4] A flame detector including a photo-cell 1 comprises circuitry for distinguishing in the photo-cell output any randomly alternating component caused by flame flicker and utilizing this component, or its absence, to signal presence or absence of flame respectively. The output from a photo-diode, photo-resistor or photo-transistor 1 positioned to receive flame radiation if filtered and amplified at 2. The filter pass-band, typically 2 to 40 Hz, allows through the flame flicker component as well as any other cyclically varying component in that range. However, the flame flicker component is characterized by its non-constant amplitude maxima, whereas other components of the filter output, caused e.g. by light reflection from moving parts or interference from flickering lamps, will have a steady A.C. level. Hence the output from rectifier 3 and low-pass filter 4, whose upper cut-off is less than the lower cut-off amplifier 2, is a D.C. signal, corresponding to the “non-random” photo-cell output, on which is superimposed, in the presence of flame, an A.C. “flicker” signal. This signal is amplified at 5 and then supplied to a threshold detector and integrator 6. This circuit provides a signal to a relayoperated alarm if the A.C. input to it persists for a predetermined time period. This may be done by generating pulses when an integrated voltage level is exceeded and counting these pulses per unit time. Fail-safe arrangements. If the level of the “non- random” output from amplifier 2 is high, this amplifier may become overloaded and thereby block the flame detector. To signal such an overload the D.C. level at the output of filter 4 is sensed, e.g. by a second threshold detector, Figs. 3 and 4 (not shown), which supplies an alarm signal, indicating overload, when the threshold is exceeded. In the embodiment of Fig.5 (not shown), the D.C. output from the filter 4 is used in an a g c loop to control the voltage supply to the photo-cell 1. The photo-cell may be provided with a red or infrared filter. More than one photo-cell may be used, each having a different spectral sensitivity, arranged in series or difference circuits.
GB998672A
1971-03-04
1972-03-03
Flame detectors
Expired
GB1377683A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
CH324871A
CH519761A
(en)
1971-03-04
1971-03-04
Flame detector
Publications (1)
Publication Number
Publication Date
GB1377683A
true
GB1377683A
(en)
1974-12-18
Family
ID=4251852
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB998672A
Expired
GB1377683A
(en)
1971-03-04
1972-03-03
Flame detectors
Country Status (7)
Country
Link
US
(1)
US3742474A
(en)
JP
(1)
JPS559613B1
(en)
BE
(1)
BE765881A
(en)
CH
(1)
CH519761A
(en)
DE
(1)
DE2204718C3
(en)
FR
(1)
FR2128329B1
(en)
GB
(1)
GB1377683A
(en)
Cited By (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2129639A
(en)
*
1979-10-19
1984-05-16
France Etat
Detecting vehicles
GB2179519A
(en)
*
1977-09-16
1987-03-04
Zeiss Stiftung
Detecting helicopters
GB2223844A
(en)
*
1988-10-12
1990-04-18
Graviner Ltd
Flame detector
GB2224117A
(en)
*
1988-10-12
1990-04-25
Detector Electronics
Recognition and processing of waveforms
US5237512A
(en)
*
1988-12-02
1993-08-17
Detector Electronics Corporation
Signal recognition and classification for identifying a fire
Families Citing this family (23)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3852729A
(en)
*
1973-03-06
1974-12-03
Electronics Corp America
Flame failure controls
IT1011594B
(en)
*
1973-03-20
1977-02-10
Electricite De France
DEVICE FOR THE CONTROL OF THE FLAME OF BURNERS
US3903418A
(en)
*
1973-12-14
1975-09-02
Forney International
Infrared dynamic flame detector
US3947218A
(en)
*
1975-01-23
1976-03-30
Honeywell Inc.
Safety circuit for monitoring a flickering flame
DE2823410A1
(en)
*
1978-04-25
1979-11-08
Cerberus Ag
FLAME DETECTOR
US4220857A
(en)
*
1978-11-01
1980-09-02
Systron-Donner Corporation
Optical flame and explosion detection system and method
US4464049A
(en)
*
1982-01-07
1984-08-07
Westinghouse Electric Corp.
Illumination flicker meter
US4533834A
(en)
*
1982-12-02
1985-08-06
The United States Of America As Represented By The Secretary Of The Army
Optical fire detection system responsive to spectral content and flicker frequency
DE3318974C2
(en)
*
1983-05-25
1985-10-17
Preussag AG Bauwesen, 3005 Hemmingen
Flame detector
US4553031A
(en)
*
1983-09-06
1985-11-12
Firetek Corporation
Optical fire or explosion detection system and method
US4665390A
(en)
*
1985-08-22
1987-05-12
Hughes Aircraft Company
Fire sensor statistical discriminator
JPS61178621A
(en)
*
1985-02-04
1986-08-11
Hochiki Corp
Flame detector
FR2592976B1
(en)
*
1986-01-10
1988-10-07
Thomson Csf
FAST FIRE DETECTION DEVICE
EP0338218B1
(en)
*
1988-03-30
1993-09-15
Cerberus Ag
Early fire detection method
JPH0278610A
(en)
*
1988-09-13
1990-03-19
Yukiko Hiyougo
Coating agent for preventing dermatitis caused by metallic accessory
US4904986A
(en)
*
1989-01-04
1990-02-27
Honeywell Inc.
IR flame amplifier
EP0479009B1
(en)
*
1990-10-05
1996-11-27
Siemens Aktiengesellschaft
Temperature sensor
US5245196A
(en)
*
1991-08-29
1993-09-14
Hydrotech Chemical Corporation
Infrared flame sensor responsive to infrared radiation
US6278374B1
(en)
2000-05-05
2001-08-21
Kellogg Brown & Root, Inc.
Flame detection apparatus and method
CA2421664A1
(en)
*
2003-03-11
2004-09-11
International Thermal Investments Ltd.
Improved flame sensor and method of using same
US9251683B2
(en)
2011-09-16
2016-02-02
Honeywell International Inc.
Flame detector using a light guide for optical sensing
US20140353473A1
(en)
*
2013-05-31
2014-12-04
General Electric Company
System and method for determination of flames in a harsh environment
US9780743B2
(en)
2015-10-22
2017-10-03
Google Inc.
Light sensor readout system and method of converting light into electrical signals
Family Cites Families (13)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2811711A
(en)
*
1951-05-19
1957-10-29
Electronics Corp America
Fire method and apparatus
DE1024851B
(en)
*
1953-05-04
1958-02-20
Electronics Corp America
Display device for flames
US2722677A
(en)
*
1954-08-31
1955-11-01
Electronics Corp America
Fire detection apparatus
US2946990A
(en)
*
1954-09-14
1960-07-26
Specialties Dev Corp
Apparatus for detecting flame
US2994859A
(en)
*
1956-06-15
1961-08-01
Specialties Dev Corp
Flame detecting apparatus
US2981939A
(en)
*
1956-11-27
1961-04-25
Petcar Res Corp
Fire detector system
US3154724A
(en)
*
1961-10-09
1964-10-27
Electronics Corp America
Combustion control system
DE1187748B
(en)
*
1961-11-16
1965-02-25
Pyrotector G M B H
Photocell arrangement
US3156908A
(en)
*
1961-12-04
1964-11-10
Viking Corp
Flame responsive apparatus
US3344277A
(en)
*
1965-02-23
1967-09-26
Kent F Smith
Radiation monitor with background compensation
US3487222A
(en)
*
1967-11-03
1969-12-30
Bausch & Lomb
Automatic gain control for self-calibrating a detection system
US3514209A
(en)
*
1968-02-09
1970-05-26
Du Pont
Device for measuring the maximum intensity of a pulse of energy
US3531692A
(en)
*
1969-03-03
1970-09-29
Combustion Eng
Activity detector having increased accuracy of response
1971
1971-03-04
CH
CH324871A
patent/CH519761A/en
not_active
IP Right Cessation
1971-04-07
US
US00131898A
patent/US3742474A/en
not_active
Expired – Lifetime
1971-04-16
BE
BE765881A
patent/BE765881A/en
not_active
IP Right Cessation
1972
1972-02-01
DE
DE2204718A
patent/DE2204718C3/en
not_active
Expired
1972-02-14
FR
FR7204865A
patent/FR2128329B1/fr
not_active
Expired
1972-03-02
JP
JP2114172A
patent/JPS559613B1/ja
active
Pending
1972-03-03
GB
GB998672A
patent/GB1377683A/en
not_active
Expired
Cited By (7)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2179519A
(en)
*
1977-09-16
1987-03-04
Zeiss Stiftung
Detecting helicopters
GB2129639A
(en)
*
1979-10-19
1984-05-16
France Etat
Detecting vehicles
GB2223844A
(en)
*
1988-10-12
1990-04-18
Graviner Ltd
Flame detector
GB2224117A
(en)
*
1988-10-12
1990-04-25
Detector Electronics
Recognition and processing of waveforms
US5006710A
(en)
*
1988-10-12
1991-04-09
Detector Electronics Corporation
Recognition and processing of waveforms
GB2224117B
(en)
*
1988-10-12
1993-06-09
Detector Electronics
Processing signals derived from electromagnetic radiation sources
US5237512A
(en)
*
1988-12-02
1993-08-17
Detector Electronics Corporation
Signal recognition and classification for identifying a fire
Also Published As
Publication number
Publication date
DE2204718B2
(en)
1978-08-31
DE2204718A1
(en)
1972-09-14
FR2128329A1
(en)
1972-10-20
BE765881A
(en)
1971-09-16
CH519761A
(en)
1972-02-29
US3742474A
(en)
1973-06-26
JPS559613B1
(en)
1980-03-11
DE2204718C3
(en)
1985-05-30
FR2128329B1
(en)
1977-04-01
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Legal Events
Date
Code
Title
Description
1975-04-30
PS
Patent sealed [section 19, patents act 1949]
