US3557377A - Device for electro-optically monitoring filiform material - Google Patents

Device for electro-optically monitoring filiform material Download PDF

Info

Publication number
US3557377A
US3557377A US791738*A US3557377DA US3557377A US 3557377 A US3557377 A US 3557377A US 3557377D A US3557377D A US 3557377DA US 3557377 A US3557377 A US 3557377A
Authority
US
United States
Prior art keywords
filiform material
light
filiform
sensitive element
yarn
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 - Lifetime
Application number
US791738*A
Other languages
English (en)
Inventor
Hans Raasch
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19681710131 external-priority patent/DE1710131C3/de
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3557377A publication Critical patent/US3557377A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
    • B65H63/062—Electronic slub detector
    • B65H63/065—Electronic slub detector using photo-electric sensing means, i.e. the defect signal is a variation of light energy
    • 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

Definitions

  • Device for electro-optically monitoring filiform material alternately stationary and traveling in the longitudinal direction thereof includes a light-sensitive element disposed back of the filiform material, means located in front of the filiform material for subjecting the filiform material to light beams extending in at least two directions thereto, and means for spacing the filiform material, in the traveling condition thereof, closer to the light-sensitive element than when the filiform material is in stationary condition thereof.
  • My invention relates to device for electro-optically monitoring filiform material and more'particularly such devices wherein the material is subjected from at least two directions to light influencing a light-sensitive element.
  • Devices of this general type are employed, for example, for ascertaining the presence of abnormalities in the filiform material, such as thick or thin spots therein or for inspecting the regular knotting or tying of two ends of the filiform material.
  • These devices are generally associated with a severing device which severs the filiform. material if a dimension thereof, such as the diameter, cross section, volume or the like deviates from a given nominal value.
  • the filiform material is a textile yarn, it is known, of course, that it cannot have any exact uniform cross section but rather is subject to certain variations in cross section. A specific valueof these variations is looked upon as being permissible or tolerable.
  • the device for monitoring textile yarn is so adjusted that deviations within a predetermined tolerance value do not produce any actuating pulse that would otherwise result insevering the yarn.
  • the length of the yarn portion of abnormal dimension such as a thickened portion or the like, is of significance.
  • greatly thickened yarn portions that are very short in length may nevertheless be tolerable, whereas slightly thickened yarn portions of relatively great length can have a disturbing effect.
  • delay circuits for example have been provided which permit the yarn severing device to be activated only after the predetermined maximum value of a shading for a specific time period is exceeded. Since the speed of the yarn traveling through themonitoring device is known, the tolerable length of a yarn portionof given deviating thickness is ascertained in this manner.
  • a trouble-free operating device of this type for the traveling yarn produces fault shadows when the yarn is at rest i.e. is 'not traveling in the longitudinal direction thereof through the monitoring device.
  • a movement of the filiform material, such as a yarn, transversely to the longitudinaltravel direction thereof, for example when inserting the filiform material into the monitoring device, does not result in any travel of the filiform material in thelongitudinal direction thereof, and is consequently relegated to the category of the standstill of the filiform material.
  • the spacing means defines the spacing of the filiform material from the light-sensitive element so that the light beams coming from different directions and impinging on the filiform material cast orderly shadows thereof on'the light-sensitive element.
  • the spacing of the filiform material from the light-sensitive element is increased, however, so that the shadow effects produced on the light-sensitive element by the individual light beams that extend in different directions produce no switching pulse due to their insignificance.
  • l provide in accordance with a further feature of my invention a translucent cover for the light-sensitive element which is spaced at given distance therefrom, the filiform material being disposed in abutment with the translucent cover when the filiform material is traveling in its longitudinal direction so as to define thereby the spacing of the filiform material from the light-sensitive element.
  • the translucent cover is provided with inclined end faces so that the path of the filiform material at the ends of the cover is angled off, and thus attaining not only a reliable abutment for the filiform material at the translucent cover but also simultaneously assuring that when several filiform materials are being monitored together, they will be disposed parallel to one another in front of the light -scnsitive element and will in this way be uniformly strongly illuminated.
  • l in addition to the cover of the light-sensitive element serving as an abutment member for the traveling filiform material, l provide an abutment means for the stationary filiform material which is preferably disposed parallel to the abutment surface of the translucent cover.
  • the prism or disc can then serve as the abutment means for the stationary filiform material.
  • I also provide, in accordance with my invention, at least one contour member at the translucent cover, against which the traveling filiform material abuts for providing a lateral limit to the motion of the filiform material whereby all or at least the predominant portion of the light beams impinging on the filiform material from different directions have an exciting effect on the light sensitive element.
  • FIGS. l and 2 are respective plan and side elevational views of the electro-optical device for monitoring filiform material according to my invention; and I FIG. 3 is an enlarged fragmentary view of FIG. 1.
  • FIGS. 1 and 2 there is shown a light bulb I from which light is passed through a lens 2 and a prism 3 to a photoelectric cell 4 protected by a translucent cover 5.
  • the filiform material that is being monitored is inserted between the translucent cover 5 and the prism 3.
  • the aforementioned components are so assembled that when the filiform material travels in the iongitudinal direction thereof it follows a path corresponding to the dot-dash line E whereas when the filiform material is at rest such as for example after the filiform material has been inserted in the measuring device, the filiform material adopts a course corresponding to the dot-dash line F It can be observed from the enlarged fragmentary view of FIG.
  • the path of the yarn corresponding to the dot-dash line F is angled off at the inclined end faces 50 and 5b of the translucent cover 5 so that, for example, when two yarns are inserted, assurance is afforded that both of these yarns will travel parallel to one another over the translucent cover 5 and will therefore have uniform spacing from the photoelectric cell 4.
  • Two air nozzles 6 and 7 are also provided as shown in FIG. 2. in the form of suction nozzles which act on the stationary yarn F and assure the abutment of this yarn F against the prism 3.
  • two lateral contour members 8 and 9 which extend between the prism 3 and the translucent cover 5 so as to limit the lateral movement of the yarn F to a range within which both shadows F. and F," will safely fall on the photoelectric cell 4.
  • the lateral limiting contour member 8 is formed with an insert opening 8a through which the yarn can be inserted in the measuring device.
  • the hereindescribed and illustrated device for monitoring the orderly knotting of yarn in an automatic yarn-winding machine operates in the following manner:
  • the yarn coming from the take up coil or from the supply coil is inserted through the insert slot 8a into the measuring device by means of a gripper arm simultaneously inserting the yarn into the knotting device, and thereby assumes the position represented by the dot-dash line F in which the shadow image on the photoelement of the cell 4 is at least so small that even upon accidental insertion of a deviating thick portion of the yarn, no activating pulse for the non nonillustrated yarn-severing device will be produced.
  • the suction nozzles 6 and 7 thereby hold the yarn tightly against the prism 3, at startup of the winding station of the automatic winding machine, the yarn tension increases so that the yarn, by being drawn taut between the nonillustrated yarn guiding members of the station. adopts the course represented by the dot-dash line F Thus the full shadow formation or shading action upon the photoelement of the cell 4 is immediately attained.
  • my invention is not limited to the illustrated and aforedescribed embodiment only.
  • the light emanating from the lamp 1 impinges on the filiform material from two directions by means of the prism 3.
  • a prism can also be employed which directs light beams from more than two directions onto the yarn.
  • my invention is also suited to the use of several light sources for producing the plurality of light beams. It is in fact also possible to employ diffused light which will impinge on the yarn from a virtually infinite number of directions. Also in such a case, it would be found, in accordance with the invention. that the shadow effect of the yarn in the position F is considerably less than in the the position F,, and accordingly no switching or activating pulse is released by the photoelectric cell 4 when the yarn is in the position F I claim:
  • Device for electro optically monitoring continuous filiform material alternately stationary and traveling in the longitudinal direction thereof comprising a light-sensitive element disposed back of the continuous filiform material.
  • Device comprising a translucent cover for said light-sensitive element spaced a predetermined distance therefrom, the filiform material in said traveling condition thereof being in abutting relation to said translucent cover so as to determine the spacing from said light-sensitive element of the filiform material in said traveling condition thereof.
  • Device according to claim 2 including abutment means spaced from said said light-sensitive element and being adopted for engagement in abutting relationship therewith by the filiform material in said stationary condition thereof.
  • Device including air nozzle means coordinated with said abutment means for acting on the filiform material in said stationary condition thereof.
  • Device including at least one contour member coordinated with said means for spacing from said light-sensitive element the filiform material in the traveling condition thereoffor limiting a lateral movement of the filiform material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
  • Treatment Of Fiber Materials (AREA)
US791738*A 1968-01-20 1969-01-16 Device for electro-optically monitoring filiform material Expired - Lifetime US3557377A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681710131 DE1710131C3 (de) 1968-01-20 1968-01-20 Vorrichtung zur elektro-optischen überwachung von fadenförmigem Gut

Publications (1)

Publication Number Publication Date
US3557377A true US3557377A (en) 1971-01-19

Family

ID=5689207

Family Applications (1)

Application Number Title Priority Date Filing Date
US791738*A Expired - Lifetime US3557377A (en) 1968-01-20 1969-01-16 Device for electro-optically monitoring filiform material

Country Status (6)

Country Link
US (1) US3557377A (zh)
BE (1) BE727069A (zh)
CH (1) CH485586A (zh)
ES (1) ES360019A1 (zh)
FR (1) FR1600953A (zh)
GB (1) GB1241084A (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5030841A (en) * 1987-07-06 1991-07-09 Zellweger Uster Ag Process and device for measuring the twist of a running, elongate test body
US5383776A (en) * 1992-12-31 1995-01-24 Hoechst Celanese Corporation Apparatus for analyzing polymer defects

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3506489C1 (de) * 1985-02-23 1986-08-28 Sobrevin Société de brevets industriels-Etablissement, Vaduz Fadenliefervorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2413486A (en) * 1943-03-31 1946-12-31 American Viscose Corp Method and apparatus for detecting irregularities of filaments, yarns, and the like
US2438365A (en) * 1944-11-17 1948-03-23 Alfred Hofmann & Company Stop means for textile apparatus and the like
US3016207A (en) * 1958-12-15 1962-01-09 Potter Instrument Co Inc Vacuum loop tape handler
US3053986A (en) * 1959-12-31 1962-09-11 Loepfe Erich Thread cleaner for textile machines
US3461299A (en) * 1965-05-25 1969-08-12 Zellweger Uster Ag Apparatus for photo-electric detection of double threads

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2413486A (en) * 1943-03-31 1946-12-31 American Viscose Corp Method and apparatus for detecting irregularities of filaments, yarns, and the like
US2438365A (en) * 1944-11-17 1948-03-23 Alfred Hofmann & Company Stop means for textile apparatus and the like
US3016207A (en) * 1958-12-15 1962-01-09 Potter Instrument Co Inc Vacuum loop tape handler
US3053986A (en) * 1959-12-31 1962-09-11 Loepfe Erich Thread cleaner for textile machines
US3461299A (en) * 1965-05-25 1969-08-12 Zellweger Uster Ag Apparatus for photo-electric detection of double threads

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5030841A (en) * 1987-07-06 1991-07-09 Zellweger Uster Ag Process and device for measuring the twist of a running, elongate test body
US5383776A (en) * 1992-12-31 1995-01-24 Hoechst Celanese Corporation Apparatus for analyzing polymer defects

Also Published As

Publication number Publication date
BE727069A (zh) 1969-07-01
ES360019A1 (es) 1970-06-16
FR1600953A (zh) 1970-08-03
CH485586A (de) 1970-02-15
GB1241084A (en) 1971-07-28

Similar Documents

Publication Publication Date Title
SU428616A3 (ru) Способ образования резерва и присучки пряжи при бескольцевом прядении
US3557377A (en) Device for electro-optically monitoring filiform material
KR850002294A (ko) 무저직기에 있어서 위사 결점직입 방지장치
ES8304230A1 (es) "sistema de control de mudada para una devanadora automatica".
US3447213A (en) Method and apparatus for detecting irregularities in a moving sheet of yarn
GB1256619A (zh)
US3929297A (en) Automatic winding machine having a clamping device
US3558026A (en) Yarn feeder
US3677307A (en) Arrangement provided with a photo-cell and controlling the detecting means and the stop motion in a loom upon breaking of a thread in the warping, weaving and knitting systems
US3727393A (en) Thread breakage detector
US4376516A (en) Spooling machine, method and apparatus to prevent formation of cut remnant thread pieces
US2246217A (en) Knot tying
US5237359A (en) Storage for strip material
IT7821371A0 (it) Procedimento e dispositivo di infilatura automatica di un filo in un organo cursore di una macchina tessile di filatura o di ritorcitura.
GB1113031A (en) Cutting mechanism for automatic winding machines
ES457271A1 (es) Perfeccionamientos introducidos en un aparato automatico para mudar tubos que da servicio a una continua de hilar textil o una maquina similar.
US3329359A (en) Thread guide device
GB1078255A (en) A method of and means for detecting yarn breakage in yarn making and yarn handling machines
JPH0138126Y2 (zh)
JPH0610382U (ja) 糸シート用糸切れ検出器
JPS5716949A (en) Definite tension sending mechanism for positively sending plural yarns , especially , warp yarn in loom
FR2050766A5 (en) Stop-motion for yarn winding on mechanism
JPH0328047Y2 (zh)
JPS58216869A (ja) ビリ防止装置を有する自動ワインダ−
FR2066400A5 (en) Shuttle-less loom