NO136430B - - Google Patents

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Info

Publication number: NO136430B
Authority: NO; Norway
Prior art keywords: pulse; signal; edge; gate; circuit
Prior art date: 1971-11-30

Application number

NO4252/72A

Other languages

English (en)

Norwegian (no)

Other versions

NO136430C (no

Inventor

G M Clarke

Original Assignee

Ferranti Ltd

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.)

1971-11-30

Filing date

1972-11-21

Publication date

1977-05-23

1971-11-30 Priority claimed from GB5562671A external-priority patent/GB1366369A/en

1972-11-21 Application filed by Ferranti Ltd filed Critical Ferranti Ltd

1977-05-23 Publication of NO136430B publication Critical patent/NO136430B/no

1977-08-31 Publication of NO136430C publication Critical patent/NO136430C/no

Links

230000005855 radiation Effects 0.000 claims description 9
230000003287 optical effect Effects 0.000 claims description 8
230000001960 triggered effect Effects 0.000 claims description 8
230000003111 delayed effect Effects 0.000 claims description 6
238000001514 detection method Methods 0.000 claims description 4
230000007547 defect Effects 0.000 claims 3
230000000694 effects Effects 0.000 claims 1
230000001105 regulatory effect Effects 0.000 description 3
230000007423 decrease Effects 0.000 description 2
238000006073 displacement reaction Methods 0.000 description 2
239000000463 material Substances 0.000 description 2
241000251730 Chondrichthyes Species 0.000 description 1
229910000831 Steel Inorganic materials 0.000 description 1
230000005540 biological transmission Effects 0.000 description 1
230000015572 biosynthetic process Effects 0.000 description 1
230000001276 controlling effect Effects 0.000 description 1
230000003247 decreasing effect Effects 0.000 description 1
238000010586 diagram Methods 0.000 description 1
238000003708 edge detection Methods 0.000 description 1
230000005670 electromagnetic radiation Effects 0.000 description 1
238000001914 filtration Methods 0.000 description 1
230000002045 lasting effect Effects 0.000 description 1
230000000717 retained effect Effects 0.000 description 1
238000001228 spectrum Methods 0.000 description 1
239000010959 steel Substances 0.000 description 1
238000009966 trimming Methods 0.000 description 1

Classifications

- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/34—Paper

Landscapes

Health & Medical Sciences (AREA)
Life Sciences & Earth Sciences (AREA)
Chemical & Material Sciences (AREA)
Pathology (AREA)
General Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Analytical Chemistry (AREA)
Biochemistry (AREA)
General Health & Medical Sciences (AREA)
Immunology (AREA)
Food Science & Technology (AREA)
Medicinal Chemistry (AREA)
Textile Engineering (AREA)
Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Length Measuring Devices By Optical Means (AREA)
Optical Recording Or Reproduction (AREA)

NO4252/72A 1971-11-30 1972-11-21 Kretsanordning for bruk sammen med en feildetektor for en bevegelig flate NO136430C (no)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB5562671A GB1366369A (en)	1971-11-30	1971-11-30	Detection of faults on surfaces

Publications (2)

Publication Number	Publication Date
NO136430B true NO136430B (it)	1977-05-23
NO136430C NO136430C (no)	1977-08-31

Family

ID=10474428

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NO4252/72A NO136430C (no)	1971-11-30	1972-11-21	Kretsanordning for bruk sammen med en feildetektor for en bevegelig flate

Country Status (5)

Country	Link
JP (1)	JPS5518858B2 (it)
FI (1)	FI56452C (it)
IT (1)	IT973745B (it)
NO (1)	NO136430C (it)
SE (1)	SE389916B (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS51113783A (en) *	1975-03-31	1976-10-07	Asahi Chem Ind Co Ltd	Defects detector of nonwoven fabric
US4247204A (en) *	1979-02-26	1981-01-27	Intec Corporation	Method and apparatus for a web edge tracking flaw detection system
JPS57157622A (en) *	1981-03-24	1982-09-29	Hitachi Denshi Ltd	Saw tooth wave generating circuit
SE456532B (sv) *	1985-10-18	1988-10-10	Asea Ab	Arrangemang for ytavsokning av ett provobjekt

1972
- 1972-11-21 NO NO4252/72A patent/NO136430C/no unknown
- 1972-11-27 IT IT54300/72A patent/IT973745B/it active
- 1972-11-29 SE SE7215579A patent/SE389916B/xx unknown
- 1972-11-30 FI FI3397/72A patent/FI56452C/fi active
- 1972-11-30 JP JP12029572A patent/JPS5518858B2/ja not_active Expired

Also Published As

Publication number	Publication date
JPS4864983A (it)	1973-09-07
SE389916B (sv)	1976-11-22
FI56452C (fi)	1980-01-10
JPS5518858B2 (it)	1980-05-22
IT973745B (it)	1974-06-10
FI56452B (fi)	1979-09-28
NO136430C (no)	1977-08-31

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