GB712733A - Apparatus for inspecting and classifying elongated flat strips - Google Patents

Apparatus for inspecting and classifying elongated flat strips

Info

Publication number
GB712733A
GB712733A GB2961252A GB2961252A GB712733A GB 712733 A GB712733 A GB 712733A GB 2961252 A GB2961252 A GB 2961252A GB 2961252 A GB2961252 A GB 2961252A GB 712733 A GB712733 A GB 712733A
Authority
GB
United Kingdom
Prior art keywords
strip
sheet
valve
pulse
pinhole
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
GB2961252A
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.)
United States Steel Corp
Original Assignee
United States Steel Corp
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 United States Steel Corp filed Critical United States Steel Corp
Publication of GB712733A publication Critical patent/GB712733A/en
Expired legal-status Critical Current

Links

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
    • G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
    • G01N21/894—Pinholes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/4809—With loop former preceding tool

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Sorting Of Articles (AREA)

Abstract

712,733. Photo-electric pin-hole detectors. UNITED STATES STEEL CORPORATION. Nov. 24, 1952 [March 18, 1952], No. 29612/52. Class 40 (3) Apparatus for testing a roll of steel strip for pinholes with a photocell before being tinned and cut into sheets comprises means for marking the strip at the pinhole, and actuating a deflecting gate subsequently by means of a mark detector in combination with photocells sensitive to the leading and trailing edges of the sheet to deflect the reject sheet on to a reject pile. As shown, a strip of metal S is examined by a light source 20 and photo-cell 22, the presence of a pinhole producing a pulse which is amplified at 24 to actuate a magnetic marker 26 at approximately the same place on the strip as the pinhole. After treatment and shearing into individual sheets S', the magnetic mark on the faulty sheet S<SP>1</SP> is sensed by a detector 34 to produce via amplifier 42 a positive bias on a thyratron 44 to cause it to conduct, whereupon a negative pulse is sent to the grid of a further thyratron 50. When the leading edge of the faulty, marked sheet S' passes between a light 28 and photocell 30 a negative pulse is sent to the anode of valve 44 to extinguish this valve, thereby sending a positive pulse to valve 50 and causing it to fire, energizing a relay coil 56 in its anode circuit, followed by solenoid 60 to actuate a deflector gate 14. The trailing edge of the marked sheet produces a pulse in a further photocell 32 which is amplified at 64 to extinguish valve 50, thereby restoring the gate 14 to its normal position. The strip marking may be other than magnetic.
GB2961252A 1952-03-18 1952-11-24 Apparatus for inspecting and classifying elongated flat strips Expired GB712733A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27713852 US2730233A (en) 1952-03-18 1952-03-18 Apparatus for inspecting and classifying flat steel products

Publications (1)

Publication Number Publication Date
GB712733A true GB712733A (en) 1954-07-28

Family

ID=23059553

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2961252A Expired GB712733A (en) 1952-03-18 1952-11-24 Apparatus for inspecting and classifying elongated flat strips

Country Status (3)

Country Link
US (1) US2730233A (en)
BE (1) BE516601A (en)
GB (1) GB712733A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1087817B (en) * 1955-05-11 1960-08-25 United States Steel Corp Process for sorting out sheet metal of insufficient length in a sheet metal cutting path and arrangement when carrying out this process
DE1224514B (en) * 1958-09-18 1966-09-08 United States Steel Corp Device for photoelectric length measurement of workpieces transported one behind the other at short intervals

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2970691A (en) * 1954-05-12 1961-02-07 Ungerer Fritz Plant for sorting strips of material differing from one or more reference characteristics
US2884130A (en) * 1954-06-21 1959-04-28 Bosch Julius Apparatus for sorting steel plates and the like
US2994429A (en) * 1955-08-30 1961-08-01 Ibm Electronic searching selector
US2904174A (en) * 1956-01-27 1959-09-15 Eastman Kodak Co Identification of sensitized paper or film defects with magnetic materials
US3008365A (en) * 1956-07-03 1961-11-14 United States Steel Corp Punch for marking travelling strip
US2941793A (en) * 1956-11-27 1960-06-21 Cheney Lumber Company Inc Mechanism for detecting and indicating lumber pieces which contain excess moisture
US3051841A (en) * 1956-11-28 1962-08-28 Crosfield J F Ltd Printing and photography
US2957688A (en) * 1957-05-29 1960-10-25 Proctor Silex Corp System for heat treating continuous punched strip
US3310169A (en) * 1966-03-04 1967-03-21 Warren S D Co Autoamtic paper finishing machine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE21927E (en) * 1941-10-21 Electromagnetic testing system
US2306211A (en) * 1940-05-18 1942-12-22 Gen Electric Grading apparatus
US2563213A (en) * 1949-06-01 1951-08-07 United States Steel Corp Control unit for pinhole detectors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1087817B (en) * 1955-05-11 1960-08-25 United States Steel Corp Process for sorting out sheet metal of insufficient length in a sheet metal cutting path and arrangement when carrying out this process
DE1224514B (en) * 1958-09-18 1966-09-08 United States Steel Corp Device for photoelectric length measurement of workpieces transported one behind the other at short intervals

Also Published As

Publication number Publication date
BE516601A (en) 1900-01-01
US2730233A (en) 1956-01-10

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