US3390708A - Weft-fork for a weaving loom - Google Patents

Weft-fork for a weaving loom Download PDF

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Publication number
US3390708A
US3390708A US553977A US55397766A US3390708A US 3390708 A US3390708 A US 3390708A US 553977 A US553977 A US 553977A US 55397766 A US55397766 A US 55397766A US 3390708 A US3390708 A US 3390708A
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US
United States
Prior art keywords
weft
fork
loom
box
reed
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Expired - Lifetime
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US553977A
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English (en)
Inventor
Scherillo Vittorio
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.)
Nuovo Pignone SpA
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Nuovo Pignone SpA
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Publication date
Application filed by Nuovo Pignone SpA filed Critical Nuovo Pignone SpA
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Publication of US3390708A publication Critical patent/US3390708A/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

  • a feeler which has one end pivoted in a box carried by a pivotally adjustable support. The other end of the lever will contact the weft thread and be lifted upwardly by the weft thread to open a switch in the box if the weft thread is present.
  • a spring in the box urges the lever constantly downwardly to close the switch.
  • a cam closes a second switch on each cycle of reciprocation of the reed. When both switches are closed the circuit to the stop mechanism is made to stop the loom.
  • This invention relates to a device for. automatically stopping a weaving loom in which case a weft thread is not inserted or is broken or slackened.
  • the principal object of the present invention is just to provide a weft-fork device adapted to check the presence of the weft thread in the last inches of the fabric, so as to signal even mere slackening of said weft thread, thus causing the immediate stoppage of the loom.
  • FIGS. 1 and la are elevational views taken at right angles to each other and showing a weft fork lever constructed according to one embodiment of this invention, and the supporting arm therefor.
  • FIG. 2 is a view on a somewhat enlarge-d scale showing the position of the feeling blade.
  • FIG. 3 is a view showing the feeling blade when no weft-thread has been inserted.
  • FIG. 4 is a diagram illustrative of the electric circuitry of the device.
  • the weft-fork device which is the subject of this invention, comprises a stiff supporting member 1, arranged outside the warp threads 20 in the right side of the fabric, which member rigidly connects the box 2 to a fixed part of the loom. Furthermore, it is positioned behind the reed 10, in such a location that the latter, in its motion, is not hindered by said supporting member.
  • the supporting member 1 is adjustable on the loom frame, and be secured in any adjusted position by bolts 18 which pass through slots 19 in the supporting member and thread into the frame.
  • connection between the box 2 and the supporting member -1 is via an adjustable pivot 14, which allows arranging the box 2 adjacent the shed while maintaining said box outside the shed in such a position as to avoid the warp threads 20, in their shedopening movement, interfering therewith.
  • the box 2 carries the pivot 3 which is a fulcrum for the weft-fork lever '4, positioned outside the box 2.
  • a lever 5 carrying at its end a tungsten-point 6 which forms one of two electric contacts, the other one 15 being affixed to the uppermost wall of the box 2.
  • the weft-fork lever 4 which as shown in FIGS. 1, 2 and 3 is supported above, and substantially completely outside of the warp shed, passes through the teeth of the reed 10, having a length suflicient to stay constantly on the fell of the previously woven fabric, and between the reed teeth throughout the stroke of the reed: furthermore, its lowermost portion 11 is shaped so as to be situated partially under the ideal central plane 17 of the warp opening (see FIG. 3) when no weft thread is present.
  • said weft in its displacement towards the already woven fabric portion, comes into contact with the curved portion 11 of the blade 4, lifting the latter and causing the two electric confacts 6 and 15 to be opened.
  • Said contacts are norm-ally closed contacts but they do not normally send any signal to the loom-stopping relay 16 because the weft-fork electric circuitry passes through an electromechanical current-delivering device formed by a switch 12 and a cam 13 driven by the loom crankshaft (see FIG, 4), which allows the delivery of the signal to the loom-stopping relay 16 only in the time interval when the weft-fork is activated.
  • the electromechanical distributor thus, by the intermediary of the cam 13, establishes the activation times of the weft-fork with respect to the weft-insertion stage.
  • the actuation of the weft-fork is limited to the time in which the weft begins to lift the blade 4 and until such time as the weft is picked against the already woven fabric port-ion.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US553977A 1965-06-11 1966-05-31 Weft-fork for a weaving loom Expired - Lifetime US3390708A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1318465 1965-06-11

Publications (1)

Publication Number Publication Date
US3390708A true US3390708A (en) 1968-07-02

Family

ID=11144289

Family Applications (1)

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US553977A Expired - Lifetime US3390708A (en) 1965-06-11 1966-05-31 Weft-fork for a weaving loom

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US (1) US3390708A (enrdf_load_html_response)
BE (1) BE811170Q (enrdf_load_html_response)
DE (1) DE1535557A1 (enrdf_load_html_response)
GB (1) GB1088079A (enrdf_load_html_response)
NL (1) NL6608123A (enrdf_load_html_response)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678969A (en) * 1970-12-15 1972-07-25 Nissan Motor Method and apparatus for detecting mispick in loom

Citations (6)

* 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
US2819737A (en) * 1954-05-07 1958-01-14 Vyzk Ustav Tvarecich Stroju Weft stop motion for weaving looms
US3049152A (en) * 1960-03-22 1962-08-14 Lees & Sons Co James Weft detector mechanism
US3145739A (en) * 1960-03-09 1964-08-25 Metzler Kurt Weft sensing means
US3237656A (en) * 1962-06-26 1966-03-01 Dewas Raymond Weaving loom comprising a device for the guiding and supervision of the weft thread
US3289709A (en) * 1963-07-05 1966-12-06 Llado Jose Llado Weft stop motion for looms

Patent Citations (6)

* 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
US2819737A (en) * 1954-05-07 1958-01-14 Vyzk Ustav Tvarecich Stroju Weft stop motion for weaving looms
US3145739A (en) * 1960-03-09 1964-08-25 Metzler Kurt Weft sensing means
US3049152A (en) * 1960-03-22 1962-08-14 Lees & Sons Co James Weft detector mechanism
US3237656A (en) * 1962-06-26 1966-03-01 Dewas Raymond Weaving loom comprising a device for the guiding and supervision of the weft thread
US3289709A (en) * 1963-07-05 1966-12-06 Llado Jose Llado Weft stop motion for looms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678969A (en) * 1970-12-15 1972-07-25 Nissan Motor Method and apparatus for detecting mispick in loom

Also Published As

Publication number Publication date
BE811170Q (fr) 1974-06-17
NL6608123A (enrdf_load_html_response) 1966-12-12
DE1535557A1 (de) 1971-04-01
GB1088079A (en) 1967-10-18

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