US3584225A - Automatic yarn inspector comprising double integrating means and electronic calibrating means - Google Patents

Automatic yarn inspector comprising double integrating means and electronic calibrating means Download PDF

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Publication number
US3584225A
US3584225A US827117A US3584225DA US3584225A US 3584225 A US3584225 A US 3584225A US 827117 A US827117 A US 827117A US 3584225D A US3584225D A US 3584225DA US 3584225 A US3584225 A US 3584225A
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United States
Prior art keywords
pulse
light
inspected
strands
defects
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US827117A
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Howard Charles Londemann
Seymout Phillip Zalkin
Conrado Willems
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Lindly and Co Inc
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Lindly and Co Inc
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    • 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
    • G01N33/36—Textiles
    • G01N33/365—Textiles filiform textiles, e.g. yarns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
    • B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
    • B65H63/028—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element
    • B65H63/032—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic
    • B65H63/0321—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators
    • B65H63/0324—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators using photo-electric sensing means, i.e. the defect signal is a variation of light energy
    • 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
    • G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
    • G01N21/8915—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined non-woven textile material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/38—Thread sheet, e.g. sheet of parallel yarns or wires

Definitions

  • ABSTRACT A detection system for inspecting strands of elongated material such as yarn, fishing line, sutures, cord, string, thread and the like while being advanced longitudinally individually or as a multiplicity in sheet form and for inspecting fabric and web materials.
  • a lamp provides a beam of light applied to the material being inspected which impinges on photoresponsive means that provides voltage signals when defects occur in the material being inspected.
  • a circuit is pro-' vided for generating signals corresponding to selected ones of the voltage comprising an integrating circuit receives these 3 Claims 30 Drawing Figs? corresponding signals and generates composite signals the am- U.S. Cl 250/219, plitude of which depends on the quantity and amplitude of the 66/ 1 63, 356/238 A corresponding signals produced in preselected periods of Int. Cl G01n 21/30, time.
  • Length-adjust means adjust the quantity of the cor- GOln 21/16, D04b 35/12 responding signals which will be integrated to determine the Field of Search 250/219 length of the defects which are detected on the material being (S); 66/163; 356/238 inspected.
  • FIG. 8e

Abstract

A detection system for inspecting strands of elongated material such as yarn, fishing line, sutures, cord, string, thread and the like while being advanced longitudinally individually or as a multiplicity in sheet form and for inspecting fabric and web materials. A lamp provides a beam of light applied to the material being inspected which impinges on photoresponsive means that provides voltage signals when defects occur in the material being inspected. A circuit is provided for generating signals corresponding to selected ones of the voltage comprising an integrating circuit receives these corresponding signals and generates composite signals the amplitude of which depends on the quantity and amplitude of the corresponding signals produced in preselected periods of time. Length-adjust means adjust the quantity of the corresponding signals which will be integrated to determine the length of the defects which are detected on the material being inspected.

Description

United States Patent Inventors Howard Charles Lindemann Westbury; Seymour Phillip Zalkin, New Rochelle: Conrado Willems, Bayside, all of, NY. Appl. No. 827,117 Filed May 19, 1969 Patented June 8, 1971 Assignee Lindly & Company, Inc.
Nassau County, N.Y.
Continuation of application Ser. No. 490,773, Sept. 17, 1965, now abandoned which is a continuation-in-part of application Ser. No. 142,373, Oct. 2, 1961, now abandoned.
AUTOMATIC YARN INSPECTOR COMPRISING DOUBLE INTEGRATING MEANS AND ELECTRONIC CALIBRATING MEANS Primary Examiner.lames W. Lawrence Assistant ExaminerT. N. Grigsby Attorney-Robert E. Burns ABSTRACT: A detection system for inspecting strands of elongated material such as yarn, fishing line, sutures, cord, string, thread and the like while being advanced longitudinally individually or as a multiplicity in sheet form and for inspecting fabric and web materials. A lamp provides a beam of light applied to the material being inspected which impinges on photoresponsive means that provides voltage signals when defects occur in the material being inspected. A circuit is pro-' vided for generating signals corresponding to selected ones of the voltage comprising an integrating circuit receives these 3 Claims 30 Drawing Figs? corresponding signals and generates composite signals the am- U.S. Cl 250/219, plitude of which depends on the quantity and amplitude of the 66/ 1 63, 356/238 A corresponding signals produced in preselected periods of Int. Cl G01n 21/30, time. Length-adjust means adjust the quantity of the cor- GOln 21/16, D04b 35/12 responding signals which will be integrated to determine the Field of Search 250/219 length of the defects which are detected on the material being (S); 66/163; 356/238 inspected.
/ 4I5 /4IT 4l9 STORING EMITTER EMITTER AMPLIFIER moor AMPLIFIER INTEGRATINF AND N INTEGRATING CIRCUITS AMPLIFIER CIRCUITS 4|0 A 4I3 I INDICATINC INDICATOR C I R C U I T LA M P 425 4 2 STOP EMITTER -420 MOTION HULTI- EOLEIIEI'YGETI? VI B RATOR RELAY ADJUST PATENTED JUN 8l97l SHEET 02 0F 21 PATENTED JUN 8 mm SHEET 05 HF PATENTED JUN EH97! SHEEI 08 0F 21 I 7 HIGH 7 REGULATOR COMPENSATOR VOLTAGE SUPPLY use. LNEl POWER AMPLIFIER mow SUPPLY LA P 22\ M VOLTAGE LAMP PHoIo- TUBE REGULATOR :;.Ji I35 /I37 HIGH REcuLAIoR COMPENSATOR VOLTAGE IsI' LIME PowER IIIPuI SUPPLY LAMP VOLTAGE REGULATOR 40s 40s A 1/ 1/ 40s I/4IY 4l9 sIoRIIII; EMITTER EMITTER AMPLIFIER DIODE AMPLIFIER N EGRATINV' AND N0 IMIEcRAIIIII; CIRCUITS AMPLIFIER moms 4|3 J r J! INDICATING INDICATOR cI RCUIT LAMP 4 25 [422 STOP EMITTER A2o VIBRATOR RELAY ADJUST PATENTED AAA PPR LINE INPUT |3| LINE} INPUT SHEET 07 F 21 7 FE ii 638 REGULATOR COMPENSATOR VOLTAGE Z SUPPLY 657 & osc.
CIRCUIT PowER -Q 'B OUTPUT suPPL AMPLIFIER RELAY 658 425 22 R55 LAMP PHOTO- VOLTAGE TUBE REGULATOR LAMP STOP MOTION /265 RELAY I HIGH REGULATOR COMPENSATOR VOLTAGE SUPPLY & osc.
CI Rcun OUTPUT AMPLIFIER RELAY '1 M42 |so 4 SUPPLY L E R G T R OUTPUT L 21 AMPLIFIER S W v LAMP VOLTAGE LAMP STOP REGULATOR MOTION 265 RELAY Pmmanw awn 0584225 SHEET U8 0F 21 I F.1- qufi HIGH REGULATOR COMPENSATOR v T G 51' SUPPLY I5T'/ & osc. LINE PoggR CIRCUIT INPUT 5U LY OUTPUT AMPLIFIER RELAY 22 m. PH0T0 20 325 321 TUBE LAMP ourPur VOLTAGE LAMP AMPL'F'ER RELAY REGULATOR g STOP RELAY 200 LENGTH OUTPUT- SELECTOR RELAY Y1 AMPLIFIER 9oo CALIBRATOR LE'NGTH SELECTOR CAUBRATOR FIG. lTb m M F|G.|7a q HG m F|G.|8a F.lG.'l8b
FIG. |8e
PATENTEUJUN man SHEET 09 0F 21 PATENTEUJUN am 31584225 I saw 100F 21 305 r qu/Jl FAIL SAFE INDICATOR PATENTEDJunmsn 3,584,225
' sum 11UF 21 AMPLIFIER No. 1
F E- f LOW PATENTED JUN' 8197:
SHEET 12 0F 21 AMPLIFIER No.2
A c K (D (R) s COUNTERU PATENTED Jun 8 Ian SHEET 13 0F 21 PATENTED JUN 8 l97l 3594.225
SHEET 1% 0F 23 AMPLIFIER No.1
% E -li SHORT DEFECT o LENGTH PATENTED JUN 8197i 3584225 SHEET 17 0F 21 v AMPLIFIER N91 LENGTH A MP. 2 555 230' Low SENSITIVITY TERM 4 TERM 1 ACO AC SIG.
T0, PT. F
PATENTEU JUN 8197i SHEET 18 0F .21
I qf' AMPLIFIER No. 2
PATENIED JUN a ran sum 19 or 21

Claims (3)

1. A detection system for inspecting strands of elongated material such as yarn, fishing line, medical sutures, cord, string, thread and the like while being advanced longitudinally individually or as a multiplicity in sheet form and for inspecting fabric and web materials comprising, circuitry having a lamp from which emanates a beam of light relative to which the material being inspected is moved transversely thereof and including photoresponsive means on which said light impinges to provide voltage signals when defects occur in the material being inspected, first circuit means connected to respond to said voltage signals for generating corresponding signals from selected ones of said voltage signals, second circuit means connected to receive said corresponding signals in a configuration responsive to said corresponding signals and including integrating circuit means for generating composite signals the amplitude of which depends on the quantity and amplitude of said corresponding signals produced in preselected periods of time, means responsive to each of said composite signals generated controlling the movement of said material, in response to at least some of said composite signals and lengthadjust means to adjust the quantity of said corresponding signals said second circuit will integrate to determine the length of the defects which are detected on said material being inspected.
2. In combination an automatic photoelectric inspector apparatus and an electronic calibrator for inspecting strands of elongated material, yarn, fishing line, medical sutures, cord, string, thread and the like while being advanced longitudinally and as a multiplicity in sheet form and for inspecting fabric and web materials comprising, a detecting head comprising a source of light, an optical system cooperative with said light source having an optical axis for projecting a substantially collimated inspection beam of light rays across the strand or sheet of strands to be inspected, means providing at least one guide surface over which said strand or sheet of strands pass when being inspected comprising means for disposing said guide surface substantially parallel to said optical axis, a photoelectric unit having means disposed for receiving the light beam rays after projection across said strand or sheet of strands and comprising pulse generating means to generate discrete pulses representative of discrete defects detected by the light beam and in response to modulated light rays causing variations of the amount of light in said beam due to said defects, control circuitry connected to said pulse generating means for establishing variable pulse amplitude effective levels representative of a variable lower limit of diameters of the defects to be detected, and actuating means responsive only to pulses within said limit of amplitudes, an electronic calibrator comprising, means for generating a pulse, a differentiating circuit connected to receive said pulse and sharpen it, a monostable vibrator triggered by said pulse connected to receive said sharpened pulse, a pulse shaping network for shaping the pulse to a preselected shape, means for applying the output of said vibrator to said shaping network, and means controllable for establishing a variable amplitude level for said pulses so that the amplitude level is indicative of a predetermined value of a physical variable.
3. In combination an automatic photoelectric inspector apparatus and an electronic calibrator for inspecting strands of elongated material, yarn, fishing line, medical sutures, cord, string, thread and the like while being advanced longitudinally individually and as a multiplicity in sheet form and for inspecting fabric and web materials comprising, a detecting head comprising a source of light, an optical system cooperative with said light source having an optical axis for projecting a substantially collimated inspection beam of light rays across the strand or sheet of strands to be inspected, means providing at least one guide surface over which said strand or sheet of strands pass when being inspected comprising means for disposing said guide surface substantially parallel to said optical axis, a photoelectric unit having means disposed for receiving the ligHt beam rays after projection across said strand or sheet of strands and comprising pulse generating means to generate discrete pulses representative of discrete defects detected by the light beam and in response to modulated light rays causing variations of the amount of light in said beam due to said defects, control circuitry connected to said pulse generating means for establishing variable pulse amplitude effective levels representative of a variable lower limit of diameters of the defects to be detected, and actuating means responsive only to pulses within said limit of amplitudes, said electronic calibrator comprising, means comprising an astable multivibrator for generating a negative pulse, a differentiating circuit connected to receive said negative pulse and sharpen it, a monostable vibrator triggered by said pulse connected to receive said sharpened pulse, a pulse shaping network for shaping the pulse to a preselected shape, means for applying the output of said vibrator to said shaping network, and means controllable for establishing a variable amplitude level for said pulses so that the amplitude level is indicative of the level of a physical variable.
US827117A 1969-05-19 1969-05-19 Automatic yarn inspector comprising double integrating means and electronic calibrating means Expired - Lifetime US3584225A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738124A (en) * 1971-04-08 1973-06-12 Deering Milliken Res Corp Knitting machine stop motion
US3746865A (en) * 1971-07-06 1973-07-17 Fiber Industries Inc Threadline defect detector
US4415926A (en) * 1982-05-28 1983-11-15 Eastman Kodak Company Inspection of elongated material
US4464913A (en) * 1983-01-12 1984-08-14 Consolidated Foods Corporation Knitting machine control system
EP0213587A2 (en) * 1985-09-05 1987-03-11 Ppg Industries, Inc. Broken filament detector and system therefor
US4887155A (en) * 1986-12-06 1989-12-12 Robert Massen Method and arrangement for measuring and/or monitoring properties of yarns or ropes
US5636803A (en) * 1993-10-29 1997-06-10 Zellweger Luwa Ag Apparatus for checking the winding quality of yarn bobbins and use of the apparatus on a winding or spinning machine
US5886789A (en) * 1996-03-01 1999-03-23 Emtec Magnetics Gmbh Optical surface testing means for linearly moving, tape-like materials
US6219136B1 (en) * 1998-03-03 2001-04-17 Union Underwear Company, Inc. Digital signal processor knitting scanner
WO2016149842A1 (en) * 2015-03-20 2016-09-29 Uster Technologies Ag Electrode assembly for capacitively testing an elongated textile material

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570381A (en) * 1947-12-13 1951-10-09 Celanese Corp Stop motion for textile machines
US2824486A (en) * 1953-12-18 1958-02-25 Nat Res Corp Method of grading textile fibers
US2927217A (en) * 1955-04-08 1960-03-01 Nat Res Corp Measuring
US2967947A (en) * 1956-10-04 1961-01-10 Du Pont Sheet inspection method and apparatus
US2991685A (en) * 1956-10-24 1961-07-11 American Enka Corp Apparatus for testing bulked yarn

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570381A (en) * 1947-12-13 1951-10-09 Celanese Corp Stop motion for textile machines
US2824486A (en) * 1953-12-18 1958-02-25 Nat Res Corp Method of grading textile fibers
US2927217A (en) * 1955-04-08 1960-03-01 Nat Res Corp Measuring
US2967947A (en) * 1956-10-04 1961-01-10 Du Pont Sheet inspection method and apparatus
US2991685A (en) * 1956-10-24 1961-07-11 American Enka Corp Apparatus for testing bulked yarn

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738124A (en) * 1971-04-08 1973-06-12 Deering Milliken Res Corp Knitting machine stop motion
US3746865A (en) * 1971-07-06 1973-07-17 Fiber Industries Inc Threadline defect detector
US4415926A (en) * 1982-05-28 1983-11-15 Eastman Kodak Company Inspection of elongated material
US4464913A (en) * 1983-01-12 1984-08-14 Consolidated Foods Corporation Knitting machine control system
EP0213587A2 (en) * 1985-09-05 1987-03-11 Ppg Industries, Inc. Broken filament detector and system therefor
EP0213587A3 (en) * 1985-09-05 1989-06-21 Ppg Industries, Inc. Broken filament detector and system therefor
US4887155A (en) * 1986-12-06 1989-12-12 Robert Massen Method and arrangement for measuring and/or monitoring properties of yarns or ropes
US5636803A (en) * 1993-10-29 1997-06-10 Zellweger Luwa Ag Apparatus for checking the winding quality of yarn bobbins and use of the apparatus on a winding or spinning machine
US5886789A (en) * 1996-03-01 1999-03-23 Emtec Magnetics Gmbh Optical surface testing means for linearly moving, tape-like materials
US6219136B1 (en) * 1998-03-03 2001-04-17 Union Underwear Company, Inc. Digital signal processor knitting scanner
WO2016149842A1 (en) * 2015-03-20 2016-09-29 Uster Technologies Ag Electrode assembly for capacitively testing an elongated textile material

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