US2820356A - Illuminators for knitting machines - Google Patents

Illuminators for knitting machines Download PDF

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Publication number
US2820356A
US2820356A US595415A US59541556A US2820356A US 2820356 A US2820356 A US 2820356A US 595415 A US595415 A US 595415A US 59541556 A US59541556 A US 59541556A US 2820356 A US2820356 A US 2820356A
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US
United States
Prior art keywords
machine
fabric
lamp
illuminator
illuminators
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
US595415A
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English (en)
Inventor
Meiners Carl Otto
Lessing Heinz Walter
Lessing Walter Benno
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.)
Meiners Optical Devices Ltd
Original Assignee
Meiners Optical Devices 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
Priority claimed from GB19745/55A external-priority patent/GB812797A/en
Application filed by Meiners Optical Devices Ltd filed Critical Meiners Optical Devices Ltd
Application granted granted Critical
Publication of US2820356A publication Critical patent/US2820356A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for

Definitions

  • the piecing-up of a broken thread in a fiat bar knitting machine can be a troublesome operation mainly because of the difficulty of locating the ends to be pieced. This casts shadows and the quality of the light is such that even if the light can be suitably directed, it illuminates everything in its path to the same extent.
  • the present invention is concerned with the equivalent problem in flat bar knitting machines, i. e. warp, fiat weft, Raschel and lace-lever machines.
  • a flat bar knitting machine is provided with an illuminator comprising a lens system which directs on the fabric as it emerges from the machine a substantially parallel beam of light of short wave length lying not substantially beyond the blue and bluegreen ranges of the spectrum.
  • the illuminator is mounted at the side of the machine to project the beam along the lines of the needle ends, that is to say along the length of the machine to illuminate the fabric as it emerges from the machine, the needles themselves, and the places where the ends of a broken thread are often to be found.
  • the light emitted by the source has short waves extending not substantially beyond the blue or blue-green United States Patent F 2,820,356 Patented Jan. 21, 1958 range of the spectrum. This, it is found, serves to bring the fabric and thread ends into special prominence no matter what is the background against which they are viewed. Light of that quality can be obtained, for example, from a mercury vapour discharge lamp.
  • the degree of illumination should be fairly high.
  • a stilb value of about 1,000 is adequate.
  • the stilb is a unit of brightness equal to that of aluminous surface having an intensity of one candle per sq. cm. of projected area. (Authority, British Standard specification 205:1943.
  • the best cross-section of the beam varies from machine to machine, depending among other things on the relative directions of the warps proceeding towards the needles and of the knitted fabric proceeding away from the needles.
  • a beam of oval cross-section is very useful which is set so that the longer axis of the oval is parallel to the plane of the fabric.
  • the illuminator mounted so that it can be set in different angular positions to suit any particular machine. Also, such adjustability enables the illuminating beam to be directed more particularly on to the cloth or the needles according to the needs of the moment.
  • Figure l is a perspective view showing an illuminator according to the invention and portion of a flat bar knitting machine;
  • Figure 2 is a side elevation of the arrangement in Figure 1;
  • Figure 3 is a perspective view of the illuminator shown in Figure 1.
  • an illuminator 18 is mounted at the side of a flat bar knitting machine so that it projects a light beam 2 along the lines of the needle ends 3 and 4, i. e. along the length of the machine.
  • the cross-section of the beam is circular.
  • Figure 2 illustrates knitted fabric 5 emerging from the machine and being illuminated in the region of the needle ends, thus enabling a break to be detected indirectly by showing a fault in the fabric 5 in bold relief.
  • illumination of the needle ends 3 and 4 facilitates the detection and replacement of a broken needle before the fault in the fabric caused by a broken needle becomes extensive. Further, since the ends of a broken thread are often to be found in the vicinity of the needle ends, direction of the beam as indicated in Figures 1 and 2 has proved to be most advantageous.
  • the illuminator 18 is shown separately in Figure 3. It comprises a casing providing a housing 20 for a lamp 22 and a trunk 24. Within the trunk there is an apertured plate 26 forming an optical stop and a plane mirror 28 which is set at 45 to the axis of the trunk. In one face of the trunk there is a lens 30 which collects the light reflected by the mirror 28.
  • the lamp 22 is a mercury vapour lamp, and can have a brightness of approximately 1000 stilb.
  • the optical system of the illuminator projects along the machine a slightly convergent beam.
  • the optical system could, however, be other than that specifically illustrated.
  • the lens 30 instead of the lens 30 receiving from the lamp 22 a divergent beam via the mirror 28 to transmit it as a slightly convergent beam, the mirror could be omitted and the lens 30 located in the end of the trunk 24 in axial alignment with the apertured plate 26.
  • the lens 30 could be located intermediate the ends of the trunk 24 to receive the incident beam directly, the emergent beam then being reflected by a mirror to emerge at right angles to the trunk.
  • a collector lens maybe included in the optical system immediately-beyond the stop 26.
  • the lens 30 is designed to produce a convergent beam the point of convergence of which is at 'least halfway along the length of the machine so that at the far end'it'will not have diverged togreater dimensions
  • a beam of restricted dimensions becomes acceptable because of the high degree of brightness of the source and has the advantage of illuminating substantially only the parts to be illuminated
  • the beam is to all intents and purposes parallel over the length of the ma- 'chine.
  • rows of needles along the length of the machine for knitting fabric and an illuminator mounted at the side of the machine comprising a housing for a lamp which emits light of short wave length lying not substantially beyond the blue and bluegreen range of the spectrum and a lens system within said housing, the said lens system being adapted to receive light from the said lamp and direct it as a substantially parallel beam along the lines of the needle ends, whereby to illuminate the needles and the fabric knitted thereby.
  • rows of needles along the length of the machine for knitting fabric and an illuminator mounted at the side of the machine comprising a housing for a lamp which emits light of short wave length lying not substantially beyond theblue and bluegreen range of the spectrum and a lens system within said 4 housing, the said lens system being adapted to receive light from the said lamp and direct it as a substantially parallel beam of oval cross-section along the lines of the needle ends, whereby to illuminate the needles and the fabric knitted thereby, the longer axis of the oval being set parallel to the plane of the knitted fabric.
  • an illuminator comprising a housing for a lamp which emits light of short wave length lying not substantially beyond the blue and blue-green range of the spectrum and a lens system within saidthousing, the said lens system being adapted to receive light from the said lamp and direct it as a slightly convergent beam onto knitted fabric as it emerges from the machine, and the point of convergence of the said beam being at least halfway along the length of the machine.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US595415A 1955-07-07 1956-07-02 Illuminators for knitting machines Expired - Lifetime US2820356A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2305855 1955-07-07
GB19745/55A GB812797A (en) 1955-08-10 1955-08-10 Improvements in and relating to knitting machines and illuminators therefor

Publications (1)

Publication Number Publication Date
US2820356A true US2820356A (en) 1958-01-21

Family

ID=41119891

Family Applications (1)

Application Number Title Priority Date Filing Date
US595415A Expired - Lifetime US2820356A (en) 1955-07-07 1956-07-02 Illuminators for knitting machines

Country Status (4)

Country Link
US (1) US2820356A (de)
CH (1) CH343576A (de)
DE (1) DE1236713B (de)
FR (1) FR1155175A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603114A (en) * 1969-05-22 1971-09-07 Nahwirkmaschinenbau Malimo Kar Warp-knitting machine
CN104088076A (zh) * 2014-07-09 2014-10-08 高满珍 双面小圆机上的照明结构
CN106903768A (zh) * 2017-03-28 2017-06-30 马千里 八片芦苇篾刀
CN106926329A (zh) * 2017-03-28 2017-07-07 马千里 四片芦苇篾刀

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1930077A (en) * 1931-06-01 1933-10-10 John G Bentley Cloth inspector
US2166851A (en) * 1936-10-16 1939-07-18 Kalio Inc Knitting machine
US2169272A (en) * 1938-02-16 1939-08-15 Max C Miller Textile machinery
US2421092A (en) * 1944-08-18 1947-05-27 Celanese Corp Stop motion for knitting machines and the like

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746151C (de) * 1941-10-11 1944-05-27 Georg Schlenk Dipl Ing Beleuchtungseinrichtung an flachen Kulierwirkmaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1930077A (en) * 1931-06-01 1933-10-10 John G Bentley Cloth inspector
US2166851A (en) * 1936-10-16 1939-07-18 Kalio Inc Knitting machine
US2169272A (en) * 1938-02-16 1939-08-15 Max C Miller Textile machinery
US2421092A (en) * 1944-08-18 1947-05-27 Celanese Corp Stop motion for knitting machines and the like

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603114A (en) * 1969-05-22 1971-09-07 Nahwirkmaschinenbau Malimo Kar Warp-knitting machine
CN104088076A (zh) * 2014-07-09 2014-10-08 高满珍 双面小圆机上的照明结构
CN104088076B (zh) * 2014-07-09 2015-10-28 高满珍 双面小圆机上的照明结构
CN106903768A (zh) * 2017-03-28 2017-06-30 马千里 八片芦苇篾刀
CN106926329A (zh) * 2017-03-28 2017-07-07 马千里 四片芦苇篾刀

Also Published As

Publication number Publication date
CH343576A (de) 1959-12-31
DE1236713B (de) 1967-03-16
FR1155175A (fr) 1958-04-23

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