US3911969A - Stop motion device for weft in the form of a single thread or several threads - Google Patents

Stop motion device for weft in the form of a single thread or several threads Download PDF

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Publication number
US3911969A
US3911969A US413308A US41330873A US3911969A US 3911969 A US3911969 A US 3911969A US 413308 A US413308 A US 413308A US 41330873 A US41330873 A US 41330873A US 3911969 A US3911969 A US 3911969A
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Prior art keywords
weft
thread
signal
threads
individual channel
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Expired - Lifetime
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US413308A
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English (en)
Inventor
Sten Ake Olaus Rydborn
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    • 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

  • This invention relates to a stop motion device for weft in the form of a single thread or several threads, said device including multi-channel means interrupting the function of the loom upon rupture of the thread and having signal transmitter means in each channel, which convert the presence of the thread into an electric signal.
  • the present invention has for its object to provide a device which permits the desired supervision fundamentally by means of a single change of thread direction even though the thread shall deliver a signal in two channels at the same time.
  • each channel of the stop motion device the signal transmitters means are connected to a first circuit means of high input impedance and low output impedance, and that signal transmitter means associated with common channels are connected to the first circuit means via a second circuit means of high input impedance and low output impedance.
  • FIG. 1 shows a circuit diagram of a weft stop motion device according to the invention
  • FIG. 2 shows the construction and relationship between three signal transmitters which may be used to supervise either a weft made of a single thread or a weft made of a plurality of threads.
  • looms are provided with means having one channel for each thread of the weft.
  • the means has two channels each with a signal transmitter converting the presence of the thread into an electric signal.
  • the means shall not interrupt the function of the loom there must occur a signal in each channel at the same time, which indicates the presence of the desired threads in the weft.
  • wefts consisting of several threads alternating with wefts having a single thread, without making greater modifications of the loom necessary.
  • the single thread has been run in such a way as to actuate the signal transmitters of the various channels at the same time.
  • this has resulted in several changes of thread direction, which in turn leads to greater wear of the thread and considerably greater risk of rupture thereof.
  • Connection A is a shielded connection
  • connection B is a supply connection
  • Connection C leads to one channel of the said means which interrupts the function of the loom
  • connection D leads to the second channel of the means. In order that the function of the loom shall not be interrupted, a signal must thus occur simultaneously in the two channels C, D.
  • Connection C leads to the output of a transistor amplifier stage including a transistor T2, said output being connected to connection A via a resistor R9, while 'connection D is connected to the output of a'tr'ansistor amplifier stage including a transistor T3, said latter output being connected to the'connection A via a resistor R12.
  • the base of the transistor T2 is connected to two series connected signal transmitters P25 and PZ6, to the collector thereof via a resistor R7, and to'connection A via a resistor R8, while the base of the transistor T3 is connected to a pair of series-connected signal transmitters P27, P28, to the collector thereof via a' resistor R11, and to connection A via a resistor R10.
  • the collector of the transistor T2 is connected to supply connection B via a resistor R2 and to connection A via a capacitor C2.
  • the free connection of the signal transmitter PZS and the free connection of the signal transmitter PZ7 are connected to one another and to the output of an amplifier stage including a transistor T1, and to connection A via a resistor R6.
  • the base of the transistor T1 is connected to four series-connected signal transmitters PZl, PZ2, P23 and PZ4, to the collector thereof via a resistor R4, and to connection A via a resistor R5.
  • the free connection of the signal transmitter PZl is connected to connection A and to the collector of the transistor TI via a capacitor C1 and to the collector of the transistor T3 via a capacitor C3.
  • the collectors of the transistors T1 and T3 are connected to supply connection B via resistors R1 and R3, respectively.
  • the three amplifier stages are identical and connected as emitter followers, whereby the amplifier stages will have a high input impedance and a low output impedance. If a thread gives rise to a signal in any of the signal transmitters PZl-PZZ the output signal from the transistor T1 will occur both at the input of the transistor T2 and the input of the transistor T3, a signal being thus obtained both in channel C and channel D.
  • the signal transmitters PZ1-PZ8 can be optionally positioned as long as they are connected in the circuitry in the manner illustrated in the drawing.
  • the present invention thus makes it possible to place the signal transmitter PZI beside the signal transmitters PZS and P27 as shown in FIG. 2, where the signal transmitters are provided with thread-receiving eyes 1, 2 and 3, and in the case of a single-thread weft to allow a thread to occur only in signal transmitter PZl, which gives rise to a signal'in both channel C and channel D.
  • two threads of a weft can be supervised by allowing one thread to occur in signal transmitter P25 and the other thread in signal transmitter PZ7, thereby providing a signal both in channel C and channel D.
  • Weft stop motion device for interrupting the function of a loom upon rupture of one thread in a first weft formed of a plurality of threads or upon rupture of a thread of a second weft formed of a single thread, comprising a circuit having individual channel means for each of said threads, signal transmitter means in each of said individual channel means for converting the presence of said thread into an electric signal, said individual channel means for the single thread of said second weft being arranged to provide said electric signal in each of said individual channel means for each of the threads of said first weft.
  • said individual channel means includes a circuit means of high input impedance and low output impedance, the inputs of said circuit means of each of said individual channel means of said first weft formed of a plurality of threads being connected to each other and the output of said circuit means of said individual channel means of said second weft formed of a single thread being connected to said connected inputs for the first weft.
  • circuit means consists of identical transistor amplifier stages connected as emitter followers.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Alarm Systems (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
US413308A 1972-11-10 1973-11-06 Stop motion device for weft in the form of a single thread or several threads Expired - Lifetime US3911969A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE14580/72A SE368041B (ko) 1972-11-10 1972-11-10

Publications (1)

Publication Number Publication Date
US3911969A true US3911969A (en) 1975-10-14

Family

ID=20299346

Family Applications (1)

Application Number Title Priority Date Filing Date
US413308A Expired - Lifetime US3911969A (en) 1972-11-10 1973-11-06 Stop motion device for weft in the form of a single thread or several threads

Country Status (5)

Country Link
US (1) US3911969A (ko)
JP (1) JPS5069355A (ko)
ES (1) ES420402A1 (ko)
FR (1) FR2206397B1 (ko)
SE (1) SE368041B (ko)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051871A (en) * 1974-04-30 1977-10-04 Roj Electrotex S.P.A. Electronic device for controlling weft yarn insertion in looms
US4063303A (en) * 1975-05-20 1977-12-13 Miyuki Gotoh Stop-motion apparatus of weaving looms
US4072935A (en) * 1975-05-05 1978-02-07 Rydborn S A O Apparatus for indicating whether one or more objects are in motion
US4178590A (en) * 1977-02-12 1979-12-11 Gebruder Loepfe Ag Electronic weft thread monitor for shuttleless weaving machines
US4421144A (en) * 1982-02-12 1983-12-20 Burlington Industries, Inc. Filling stop identification for looms
US4881062A (en) * 1986-12-15 1989-11-14 Nippon Selen Co., Ltd. Yarn break detector for spinning and weaving machines
US4951030A (en) * 1989-04-02 1990-08-21 Arbor Systems, Inc. Monitoring system
US5086542A (en) * 1990-11-30 1992-02-11 Franklin James R Electronic stop motion for textile draw frame

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3438021A (en) * 1965-07-26 1969-04-08 Westinghouse Electric Corp Perimeter intrusion alarm
US3467149A (en) * 1967-05-26 1969-09-16 Heberlein & Co Ag Electronic device for surveying the presence of weft thread in weaving looms
US3526254A (en) * 1967-09-26 1970-09-01 Sulzer Ag Method and apparatus for monitoring plural weft threads in a loom
US3611342A (en) * 1968-06-15 1971-10-05 American Enka Corp Method and apparatus for detecting transport disturbances in a continuous material
US3676769A (en) * 1968-06-17 1972-07-11 Loepfe Ag Method and apparatus for detecting a relative movement between two bodies being in frictional contact with each other
US3688958A (en) * 1970-11-16 1972-09-05 Rydborn S A O Device for sensing thread passage to control machine operation
US3802469A (en) * 1968-10-29 1974-04-09 Loefe Brothers Ltd Apparatus for monitoring shuttle filling thread

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1918740A1 (de) * 1969-04-12 1970-10-15 Sick Erwin Fa UEberwachungsvorrichtung fuer bewegte Faeden,Draehte,Baender od.dgl.
SE351446B (ko) * 1971-04-08 1972-11-27 S Rydborn

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3438021A (en) * 1965-07-26 1969-04-08 Westinghouse Electric Corp Perimeter intrusion alarm
US3467149A (en) * 1967-05-26 1969-09-16 Heberlein & Co Ag Electronic device for surveying the presence of weft thread in weaving looms
US3526254A (en) * 1967-09-26 1970-09-01 Sulzer Ag Method and apparatus for monitoring plural weft threads in a loom
US3611342A (en) * 1968-06-15 1971-10-05 American Enka Corp Method and apparatus for detecting transport disturbances in a continuous material
US3676769A (en) * 1968-06-17 1972-07-11 Loepfe Ag Method and apparatus for detecting a relative movement between two bodies being in frictional contact with each other
US3802469A (en) * 1968-10-29 1974-04-09 Loefe Brothers Ltd Apparatus for monitoring shuttle filling thread
US3688958A (en) * 1970-11-16 1972-09-05 Rydborn S A O Device for sensing thread passage to control machine operation

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051871A (en) * 1974-04-30 1977-10-04 Roj Electrotex S.P.A. Electronic device for controlling weft yarn insertion in looms
US4072935A (en) * 1975-05-05 1978-02-07 Rydborn S A O Apparatus for indicating whether one or more objects are in motion
US4063303A (en) * 1975-05-20 1977-12-13 Miyuki Gotoh Stop-motion apparatus of weaving looms
US4178590A (en) * 1977-02-12 1979-12-11 Gebruder Loepfe Ag Electronic weft thread monitor for shuttleless weaving machines
US4421144A (en) * 1982-02-12 1983-12-20 Burlington Industries, Inc. Filling stop identification for looms
US4881062A (en) * 1986-12-15 1989-11-14 Nippon Selen Co., Ltd. Yarn break detector for spinning and weaving machines
US4951030A (en) * 1989-04-02 1990-08-21 Arbor Systems, Inc. Monitoring system
US5086542A (en) * 1990-11-30 1992-02-11 Franklin James R Electronic stop motion for textile draw frame

Also Published As

Publication number Publication date
DE2355417A1 (de) 1974-05-30
ES420402A1 (es) 1976-04-16
FR2206397A1 (ko) 1974-06-07
SE368041B (ko) 1974-06-17
DE2355417B2 (de) 1976-11-11
FR2206397B1 (ko) 1976-11-19
JPS5069355A (ko) 1975-06-10

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