US2698418A - Apparatus for detecting and counting damaged filaments in yarn - Google Patents

Apparatus for detecting and counting damaged filaments in yarn Download PDF

Info

Publication number
US2698418A
US2698418A US238067A US23806751A US2698418A US 2698418 A US2698418 A US 2698418A US 238067 A US238067 A US 238067A US 23806751 A US23806751 A US 23806751A US 2698418 A US2698418 A US 2698418A
Authority
US
United States
Prior art keywords
yarn
plate
detecting
filaments
counting
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
US238067A
Inventor
Garrett Donald Arthur
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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.)
Filing date
Publication date
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Application granted granted Critical
Publication of US2698418A publication Critical patent/US2698418A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
    • G01B7/08—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using capacitive means
    • G01B7/087—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using capacitive means for measuring of objects while moving

Definitions

  • This invention relates to a method and apparatus for detecting and counting broken or looped filaments in running continuous-filament yarn.
  • broken or looped filaments in running continuous-filament yarn are detected and/ or counted by a method which comprises running the yarn freely through two small holes, one in each plate of a two-plate electrical condenser, of which one plate is fixed and the other is displaceable from its normal position, under the influence of a very small force, in a direction approximately perpendicular to its plane, and using the change in capacity of the condenser consequent upon the movement of the free plate caused by a projecting broken or looped filament to actuate a capacity-sensitive relay coupled to a suitable counter unit.
  • an apparatus for detecting and/ or counting broken or looped filaments in running continuous-filament yarn which comprises a two-plate air-dielectric electrical condenser having one plate fixed and the other plate suspended so as to be displaceable from its normal position, under the influence of a very small force, in a direction approximately perpendicular to its plane, and means for running the yarn freely through two opposed holes in the two plates, of diameter slightly greater than that of the yarn.
  • the electrical condenser When using the apparatus of this invention for detecting and/ or counting broken or looped filaments the electrical condenser is connected electrically to a suitable device for detecting and/or counting changes in electrical capacity.
  • a suitable device for detecting and/or counting changes in electrical capacity may comprise for example a capacity-sensitive relay operating an electro-magnetic counter unit or a pen on a moving chart.
  • FIG. 1 and 2 are pairs of freely running pulleys over which the yarn 3 is passed.
  • the fixed plate 4 of the electrical condenser is mounted on a support 5 and is enclosed in a box made up of Perspex sides 6 and a metal top 7.
  • the displaceable condenser plate 8 is suspended by a light-weight electrically-conducting suspension from two hooks 9 attached to the metal top 7.
  • the separation of the condenser plates may be adjusted by means of screws 10.
  • Electrical connection to the displaceable plate is made by means of a tag 11 mounted on the metal top 7 connection to the fixed plate is made by means of a screw 12 in the support 5.
  • the diameter of the hole in the displaceable condenser plate is chosen so as to exceed by approximately .01 inch the maximum diameter of the undamaged yarn.
  • the diameter of the hole in the fixed plate is not critical and may be made as large as /s" for convenience in thread-- ing the yarn through the holes initially.
  • the sensitivity of the instrument depends upon the weight of the displaceable condenser plate and may be adjusted to suit the type of yarn under inspection, the speed of running, the proportion of broken filaments and so on.
  • Apparatus for detecting broken or looped filaments in running continuous-filament yarn which comprises, a two-plate air-dielectric electrical condenser having one plate fixed and the other plate suspended so as to be displaceable from its normal position, under the influence of a very small force, in a direction approximately perpendicular to its plane, each of said plates having holes therein of a diameter slightly greater than that of the yarn opposed to each other, and means for running the yarn freely through the said opposed holes.
  • Apparatus for detecting broken or looped filaments in running continuous-filament yarn which comprises, a two-plate air-dielectric electrical condenser having one plate fixed and the other plate suspended so as to be displaceable from its normal position, under the influence of a very small force, in a direction approximately perpendicular to its plane and means to run continuous-filament yarn freely past and in loose contact with at least one edge of said suspended plate.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Treatment Of Fiber Materials (AREA)

Description

Dec. 28, 1954 Fiied July 23, 1951 GARRETT 2,698,418
[1 A APPARATUS FOR DETECTING AND COUNTING DAMAGED FILAMENTS IN YARN 2 Sheets-Sheet l /n venfor:
Dona/d Arf/rur' ctr/e11, By W, M 4 M Afro/we ya.
Dec. 28, 1954 D. A. GARRETT 2,698,413
' APPARATUS FOR DETECTING AND COUNTING DAMAGED FILAMENTS IN YARN Filed July 23, 1951 2 Sheets-Sheet 2 Doha/d Ari/m! Gar/e77,
United States Patent APPARATUS FOR DETECTING AND COUNTING DAMAGED FILAMENTS IN YARN Donald Arthur Garrett, Blackley, Manchester, England,
assignor to Imperial Chemical Industries Limited, a corporation of Great Britain Application July 23, 1951, Serial No. 238,067
Claims priority, application Great Britain August 8, 1950 3 Claims. (Cl. 324-61) This invention relates to a method and apparatus for detecting and counting broken or looped filaments in running continuous-filament yarn.
According to the invention broken or looped filaments in running continuous-filament yarn are detected and/ or counted by a method which comprises running the yarn freely through two small holes, one in each plate of a two-plate electrical condenser, of which one plate is fixed and the other is displaceable from its normal position, under the influence of a very small force, in a direction approximately perpendicular to its plane, and using the change in capacity of the condenser consequent upon the movement of the free plate caused by a projecting broken or looped filament to actuate a capacity-sensitive relay coupled to a suitable counter unit.
Also according to the invention there is provided an apparatus for detecting and/ or counting broken or looped filaments in running continuous-filament yarn which comprises a two-plate air-dielectric electrical condenser having one plate fixed and the other plate suspended so as to be displaceable from its normal position, under the influence of a very small force, in a direction approximately perpendicular to its plane, and means for running the yarn freely through two opposed holes in the two plates, of diameter slightly greater than that of the yarn.
When using the apparatus of this invention for detecting and/ or counting broken or looped filaments the electrical condenser is connected electrically to a suitable device for detecting and/or counting changes in electrical capacity. Such a device may comprise for example a capacity-sensitive relay operating an electro-magnetic counter unit or a pen on a moving chart.
After each displacement, by the impact of a broken filament, of the suspended condenser plate, it may oscillate slightly about its steady position and cause repeated closing of the capacity-sensitive relay. It may therefore be necessary, in the event that the relay is set to operate a counter-unit, to arrange for the latter to have a dead period of say A to 2 seconds after each initial impulse during which it does not respond to further impulses from the relay.
Patented Dec. 28, 1954 "ice The invention may be illustrated by reference to the accompanying drawings in which Fig. l is a side elevation and Fig. 2 is a plan.
In the drawings 1 and 2 are pairs of freely running pulleys over which the yarn 3 is passed. The fixed plate 4 of the electrical condenser is mounted on a support 5 and is enclosed in a box made up of Perspex sides 6 and a metal top 7. The displaceable condenser plate 8 is suspended by a light-weight electrically-conducting suspension from two hooks 9 attached to the metal top 7. The separation of the condenser plates may be adjusted by means of screws 10. Electrical connection to the displaceable plate is made by means of a tag 11 mounted on the metal top 7 connection to the fixed plate is made by means of a screw 12 in the support 5.
The diameter of the hole in the displaceable condenser plate is chosen so as to exceed by approximately .01 inch the maximum diameter of the undamaged yarn. The diameter of the hole in the fixed plate is not critical and may be made as large as /s" for convenience in thread-- ing the yarn through the holes initially.
The sensitivity of the instrument depends upon the weight of the displaceable condenser plate and may be adjusted to suit the type of yarn under inspection, the speed of running, the proportion of broken filaments and so on.
What I claim is:
1. Apparatus for detecting broken or looped filaments in running continuous-filament yarn which comprises, a two-plate air-dielectric electrical condenser having one plate fixed and the other plate suspended so as to be displaceable from its normal position, under the influence of a very small force, in a direction approximately perpendicular to its plane, each of said plates having holes therein of a diameter slightly greater than that of the yarn opposed to each other, and means for running the yarn freely through the said opposed holes.
2. Apparatus for detecting broken or looped filaments in running continuous-filament yarn which comprises, a two-plate air-dielectric electrical condenser having one plate fixed and the other plate suspended so as to be displaceable from its normal position, under the influence of a very small force, in a direction approximately perpendicular to its plane and means to run continuous-filament yarn freely past and in loose contact with at least one edge of said suspended plate.
3. Apparatus as recited in claim 2 in which the said edge is an interior edge formed by a small hole in the said suspended plate.
References Cited in the file of this patent UNITED STATES PATENTS
US238067A 1950-08-08 1951-07-23 Apparatus for detecting and counting damaged filaments in yarn Expired - Lifetime US2698418A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2698418X 1950-08-08

Publications (1)

Publication Number Publication Date
US2698418A true US2698418A (en) 1954-12-28

Family

ID=10913702

Family Applications (1)

Application Number Title Priority Date Filing Date
US238067A Expired - Lifetime US2698418A (en) 1950-08-08 1951-07-23 Apparatus for detecting and counting damaged filaments in yarn

Country Status (1)

Country Link
US (1) US2698418A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2200863A (en) * 1934-10-03 1940-05-14 Radio Patents Corp Electrical circuits for controlling and measuring
US2242890A (en) * 1936-12-29 1941-05-20 Brown Instr Co Means for indicating defects in thread
US2295795A (en) * 1938-11-23 1942-09-15 Brown Instr Co Registering apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2200863A (en) * 1934-10-03 1940-05-14 Radio Patents Corp Electrical circuits for controlling and measuring
US2242890A (en) * 1936-12-29 1941-05-20 Brown Instr Co Means for indicating defects in thread
US2295795A (en) * 1938-11-23 1942-09-15 Brown Instr Co Registering apparatus

Similar Documents

Publication Publication Date Title
GB1403566A (en) Detection of flaws in strip material
GB1462698A (en) Method of and apparatus for detecting faults in the operation of spinning units in open-end spinning machines
US3440634A (en) System for monitoring moving threads in textile machinery
US3037381A (en) Bump detector
US2698418A (en) Apparatus for detecting and counting damaged filaments in yarn
US2283180A (en) Accelerometer
ES2007824A6 (en) Method and electrical circuit for the reliable detection of process states within freely couplable units
US1397525A (en) Mrans for measuring vibration
GB1055667A (en) Apparatus for supervising objects intended for movement along a path of travel
US2580934A (en) Apparatus for measuring extension of ferromagnetic material during rolling
US3295355A (en) Accelerometer having self-testing means
US3927356A (en) Yarn detection devices
US2844028A (en) Apparatus for measuring denier
US2834207A (en) Gel counter
US2897306A (en) Acceleration responsive microswitch
GB1295101A (en)
US4777829A (en) Multi-station piezoelectric load cycle counter
GB1347695A (en) Apparatus for testing the weight per unit length of products of the textile industry
JPS54160287A (en) Torsional vibration monitoring apparatus of revolving shaft systems
US3154943A (en) Slub detector
GB684875A (en) Apparatus for detecting and counting damaged filaments in yarn
US2368002A (en) Damping device
US3131816A (en) Can sorting device
GB1104953A (en) Improvements in and relating to devices for testing the resistance to impact of films, fabrics and other two-dimensional structures
US3052773A (en) Combined sensing and switch device