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 PDFInfo
- 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
- Authority
- US
- United States
- Prior art keywords
- weft
- thread
- signal
- threads
- individual channel
- 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
Links
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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
- 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.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Alarm Systems (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
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)
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)
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)
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 |
-
1972
- 1972-11-10 SE SE14580/72A patent/SE368041B/xx unknown
-
1973
- 1973-11-06 US US413308A patent/US3911969A/en not_active Expired - Lifetime
- 1973-11-07 JP JP48125265A patent/JPS5069355A/ja active Pending
- 1973-11-09 FR FR7339866A patent/FR2206397B1/fr not_active Expired
- 1973-11-09 ES ES420402A patent/ES420402A1/es not_active Expired
Patent Citations (7)
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)
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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