US3570551A - Weft stop-motion for shutteless looms - Google Patents

Weft stop-motion for shutteless looms Download PDF

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Publication number
US3570551A
US3570551A US804955A US3570551DA US3570551A US 3570551 A US3570551 A US 3570551A US 804955 A US804955 A US 804955A US 3570551D A US3570551D A US 3570551DA US 3570551 A US3570551 A US 3570551A
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US
United States
Prior art keywords
weft
loom
microswitch
sley
arms
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
US804955A
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English (en)
Inventor
Albert Deborde
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.)
Ateliers Diederichs SA
Original Assignee
Ateliers Diederichs SA
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 Ateliers Diederichs SA filed Critical Ateliers Diederichs SA
Application granted granted Critical
Publication of US3570551A publication Critical patent/US3570551A/en
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/18—Automatic stop motions
    • D03D51/34—Weft stop motions

Definitions

  • the end of one arm of the needle constitutes a feeler to contact the weft thread.
  • the end of the other arm has a hook arranged to be engaged by a beak attached to a support on the sley, at the end of the stroke of the sley. If the feeler is not held in raised position due to the absence of weft thread, the hook is drawn by the beak, which tiltsthe lever, actuates the microswitch and so stops the loom.
  • the present invention relates to a weft stop-motion device for shuttleless looms or looms operating with a stationary weft supply.
  • the weft stop-motion device is a safety device indispensable for the efficient operation of any loom; and it consists of means for stopping the machine mechanically or electrically, when the weft thread breaks.
  • the control of the weft is effected, either in the middle of the sley by a horizontal fork which may or may not be held back by the weft, or on the outside of the breadth of the cloth by a vertical fork which may or may not be pushed back by the weft.
  • the first approach cannot be suitable for a shuttless loom of the "Gabler type, that is to say for the development of a loop of which one end is held at the feed side.
  • a shuttless loom of the "Gabler type that is to say for the development of a loop of which one end is held at the feed side.
  • the weft is only controlled at the moment of unwinding on the spool and, due to this fact, the part of the loop which is developed is not controlled. It is hence indispensable to control the end of the loop which is developed.
  • This control is operated generally by presenting before the weft a vertical fork pivoting around its upper end, this fork, pushed back by the weft, causing a stop device to operate.
  • this fork must be mounted on a device enabling it to descend to be presented before the weft and to reascend after the control to free the separator comb.
  • the weft stop-motion device is essentially characterized in that it is composed of a needle mounted to pivot at the end of the lever of a microswitch fixed on the frame of the machine, this needle being sent to bent to comprise two reeds of which one forms a feeler and the other constitutes, at its end, a hook which, in the case of the breakage of the weft, is at the end of the stroke of the sley, drawn by it, which causes actuation of the microswitch.
  • FIG. 1 is a side view in elevation of the said embodiment showing the relationship between the microswitch, the weft, the sley, and the means for actuating the microswitch;
  • FIG. 2 is a front view, also in elevation, of the embodiment of FIG. 1.
  • the frame 1 of the loom is fixed a support 2 on which is mounted a microswitch 3 held on the said support 2 by means of bolts 4.
  • the lever 5 of the microswitch showing the relationship between the microswitch, the weft, the sley, and means for actuating the microswitch 3 supports at its end a needle 6 pivotally mounted freely around an axle 7 rigidly attached to the lever 5.
  • This needle 6 is formed by two sides one, of which is directed downward and bent at its end at 60 to facilitate its support on the weft 8 to be controlled, while the other is nearer to the horizontal position and its end 6!; forms a hook to cooperate with the beak 10 of a support 1 which is clamped on the sley 9.
  • the sley 9 advances along the direction of the arrow and causes the end of the weft 8 to pass under the lower side 6a of the needle 6. Due to this fact, the hook 6b of the horizontal reed of the needle is held raised and passes above the beak 10 by pivoting around the axle 7.
  • control means for arresting the operation of the loom upon sensing the absence of a weft
  • said control means comprising switching means for stopping said loom, and sensing means controlling said switching means in response to the presence or absence of said weft in said sleds
  • said sensing means including a first portion freely connected pivotally to said switching means, a second portion of for sensing each inserted weft to determine its presence in a shed, and a third portion for contacting said sley upon failure of said second portion to sense a weft and, through said first portion, causing said switching means to arrest the operation of the loom.
  • said switching means includes a microswitch and a lever pivotally supported opposite said microswitch and a lever pivotally supported opposite said microswitch, said lever including a pair of arms, one of said arms being engageable with said microswitch, the other of said arms pivotally supporting said first portion of said sensing means.
  • said sensing means includes a pair of arms constituting said second and third portions thereof respectively, said first portion thereof being intermediary a said two arms.
  • sensing means is substantially U-shaped.
  • said sley includes a projection, said arm constituting said third portion of said sensing means including a hook-shaped gripping portion adapted for contracting said projection of said sley to be pulled thereby.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US804955A 1968-03-18 1969-03-06 Weft stop-motion for shutteless looms Expired - Lifetime US3570551A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR69049773 1968-03-18

Publications (1)

Publication Number Publication Date
US3570551A true US3570551A (en) 1971-03-16

Family

ID=9695189

Family Applications (1)

Application Number Title Priority Date Filing Date
US804955A Expired - Lifetime US3570551A (en) 1968-03-18 1969-03-06 Weft stop-motion for shutteless looms

Country Status (7)

Country Link
US (1) US3570551A (xx)
BE (1) BE727652A (xx)
CH (1) CH504559A (xx)
DE (1) DE1903238C3 (xx)
ES (1) ES363175A1 (xx)
FR (1) FR1572294A (xx)
GB (1) GB1249164A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009737A (en) * 1975-02-28 1977-03-01 Ruti Machinery Works Ltd. Filling thread stop motion device for a loop
US4155381A (en) * 1977-02-04 1979-05-22 Ab Iro Weft thread monitoring device
FR2634230A1 (fr) * 1988-06-27 1990-01-19 Tagawa Kikai Kk Dispositif de traitement d'extremite de trame pour un metier a tisser sans navette

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH609109A5 (en) * 1976-05-25 1979-02-15 Rueti Ag Maschf Weft-regulator arrangement
JPS599246A (ja) * 1982-07-07 1984-01-18 日産自動車株式会社 無杼織機の緯糸検知方法および装置
DE102005026248A1 (de) * 2005-06-08 2006-12-14 Sven Fischer Rotationskolbenmotor mit variablen Trennelementen und externer Kompression

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1482218A (en) * 1922-10-20 1924-01-29 Draper Corp Filling-detecting mechanism
US3260283A (en) * 1962-12-23 1966-07-12 Elitex Sdruzeni Podniku Tertil Weft thread control device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1975747A (en) * 1933-02-10 1934-10-02 Collins & Aikman Corp Stop motion for looms
DE830780C (de) * 1950-10-27 1952-02-07 Ver Seidenwebereien A G Schussfadenwaechter-Einrichtung
US2675027A (en) * 1953-03-30 1954-04-13 Crompton & Knowles Loom Works Shuttle guide
FR1445495A (fr) * 1965-03-02 1966-07-15 Comptoir Linier Dispositif palpeur de trame pour métier à tisser

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1482218A (en) * 1922-10-20 1924-01-29 Draper Corp Filling-detecting mechanism
US3260283A (en) * 1962-12-23 1966-07-12 Elitex Sdruzeni Podniku Tertil Weft thread control device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009737A (en) * 1975-02-28 1977-03-01 Ruti Machinery Works Ltd. Filling thread stop motion device for a loop
US4155381A (en) * 1977-02-04 1979-05-22 Ab Iro Weft thread monitoring device
FR2634230A1 (fr) * 1988-06-27 1990-01-19 Tagawa Kikai Kk Dispositif de traitement d'extremite de trame pour un metier a tisser sans navette

Also Published As

Publication number Publication date
ES363175A1 (es) 1970-11-16
BE727652A (xx) 1969-07-01
CH504559A (fr) 1971-03-15
DE1903238C3 (de) 1971-01-14
DE1903238B2 (de) 1970-05-21
GB1249164A (en) 1971-10-06
FR1572294A (xx) 1969-06-27
DE1903238A1 (de) 1969-12-11

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