US3410314A - Control device for movable thread guides - Google Patents

Control device for movable thread guides Download PDF

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Publication number
US3410314A
US3410314A US575297A US57529766A US3410314A US 3410314 A US3410314 A US 3410314A US 575297 A US575297 A US 575297A US 57529766 A US57529766 A US 57529766A US 3410314 A US3410314 A US 3410314A
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US
United States
Prior art keywords
harness
cam
control
control device
pusher
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
US575297A
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English (en)
Inventor
Hopf Hans
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.)
CONTINENTAL ELASTIC CORP
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CONTINENTAL ELASTIC CORP
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Publication date
Application filed by CONTINENTAL ELASTIC CORP filed Critical CONTINENTAL ELASTIC CORP
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Publication of US3410314A publication Critical patent/US3410314A/en
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/20—Electrically-operated jacquards
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C13/00—Shedding mechanisms not otherwise provided for
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C2700/00—Shedding mechanisms
    • D03C2700/01—Shedding mechanisms using heald frames
    • D03C2700/0194—Frame-operating devices for ribbon looms

Definitions

  • FIG. 1 A first figure.
  • the present invention relates to a control device for movable thread guide devices such as harnesses of looms which are moved by an associated rotating eccentric cam with the interposition of an associated transmission element, the effective length of which may selectively be changed as by means of associated stop members.
  • Looms are also 'knOWn in which in order to form the weave pattern, the harnesses are moved 'by dobbies. In this way the disadvantage of the limited number of possible patterns is eliminated.
  • cards are used which have punched holes, for example, to define a pattern and which are scanned by feeler pins. This use of dobbies to control the pattern is, however, relatively time-consuming and hence limits the operating speed of the loom so that its full capacity is not utilized.
  • the object of the present invention is to provide control devices for movable thread guide means of the type above described which will aflford a very high degree of speed in the movement of the thread guide means or harness, according to any desired pattern with relatively simple and readily controllable mechanism.
  • This object is obtained, according to the invention, by controlling the effective length of the transmission elements arranged between the cam and the harness.
  • the motion impulse caused by the rotating cam will not move the corresponding thread guide or harness at all, or will move it by a maximum amount, or by one or more intermediate amounts.
  • the harnesses can be moved under the control of the transmission elements into a lower shed or an upper shed, or one or more intermediate sheds. In this way the transmission element itself is used to control the movement of the harnesses.
  • the cams can be simple circular harmonic cams and furthenmore, it is possible to have the movement impulses for the various transmission elements produced by a common cam drive shaft.
  • the direction of the transmission element can be as desired so that a raising or lowering or even a lateral displacement of the thread guide harness means can be effected.
  • the transmission element is a pusher rod having a deformable portion and controlled in various manners so that the effective length of the rod may be adjusted in accordance with the desired position of the thread guide means or harness.
  • the deformable portion is formed by pivoted arms or links which may be moved or bent laterally outward to change the effective length of the rod.
  • the extent of the lateral deflection of the pivoted elements determines the effective length of the pusher rod.
  • the mechanism to restrain movement of the deformable portion of the rod could be icnorporated into the pusher rod itself.
  • a control system is provided which in a simple manner either holds the thread guide device in position or moves it out of such position.
  • the stops which restrains deformable portion from bending can be fully mechanical or an electric magnet can be employed to bring the stops into an active and/ or an inactive position.
  • the stops can be alternately moved by the electro-magnets into one direction or the other, for instance by means of reversing the polarity of the current applied to the magnet.
  • the control device is also simplified if the deformable portion of the pusher rod is retained in its maximum ef-- fective length by a fixed stop slightly in front of its stretched position. In this way, there is introduced a slight bend of the deformable portion which permits further bending to be effected without special auxiliary means and without loss of time.
  • the stop can also serve as the guide for the pusher rod.
  • the pusher rod itself may be of various type and may consist exclusively of a bendable member. However, it is preferable that the deformable portion be intermediate the ends of the rod so that the rigid portions can readily be guided in their longitudinal direction.
  • each individual thread guide device or harness has associated with it, with the inter position of a pusher rod, only one cam.
  • several, and preferably two cams are provided, staggered with respect to each other and both associated with a single thread guide device or harness through an associated pusher rod. In this way it is possible to lift the thread guide device or harness by one calm when the other cam is still in the low position.
  • the cams are preferably arranged staggered apart with uniform spacing, for instance, in the case of two cams they may preferably be apart from each other.
  • the number of patterns that can be formed can be further increased by holding the harness once it has been raised, by providing an insertable lock which holds the harness firmly.
  • the raised position need not in this connection necessarily be a high position, it can, for instance also be a middle position or intermediate position when several sheds are to be formed. It is possible, in principle, to move the lock completely mechanically, but for a high speed of movement it is desired to use an electromagnet which actuates the lock. If the entire load of the thread guide device or harness is associated with the lock and thus with the electromagnet, the two must be made relatively large, which involves longer response and movement times. In order to prevent this delay, the lock is retained in its active position on a stationary bearing membed. The stationary bearing member takes over the load so that the lock and the electromagnet can be kept small and can be operated with small current and high speeds.
  • the control command for providing a given active length of the transmission device can be effected by the known control devices for weaving machines.
  • the control command can be recorded on pattern cards, punch cards or the like.
  • These control devices can be used in conventional manner to open and close electric circuits. Either sensing fingers can be used or photoelectric cells can be employed.
  • the control command which in itself consists of a very short pulse can be further controlled by an adjustable multivibrator circuit in order to adjust the length of the pulse. Thus, it is possible for instance to convert the short control command into a lengthy stop pulse.
  • the locking device In the case of machines operating at particularly high speed, one may cause the locking device to be operated at a speed inversely proportional to the speed of rotation of the weaving machine.
  • a tacho-generator which converts the speed into a measurable energy and utilizes the latter to govern the duration of the control.
  • the voltage of the tacho-generator through a pro-magnetized choke to influence a multi-vibrator circuit in such a manner that the magnets of the control device have a stop time which is inversely proportional to the speed of rotation of the weaving machine.
  • FIG. 1 is a view of a loom seen from the rear side
  • FIG. 2 is a diagrammatic cross section through the loom taken along line 22 of FIG. 1,
  • FIG. 2a is an enlarged detailed view of the stop plate.
  • FIG. 3 shows a raised harness of the loom seen in the longitudinal direction of the harness
  • FIG. 4 shows a raised harness of the loom, but seen in the transverse direction of the harness
  • FIG. 5 shows a harness in the lowered position seen in the longitudinal direction of the harness
  • FIG. 6 shows a harness in the lowered position seen from the transverse side of the harness.
  • the machine frame has two side standards or columns 10 in which conventional harness frames 11 are slidably mounted for up and down movement in suitable guides in manner well known to those skilled in the art.
  • the harness frames 11 are reciprocated by a harness control designated generally as 12 by means of cams 20 mounted on cam shaft 13.
  • Each harness frame 11 has a plurality of heddles 14, through the holes or eyes of which extend warp threads 15.
  • the loom also includes a take-up roller 16 which takes up the finished Web formed from the warp threads 15.
  • a take-up roller 16 which takes up the finished Web formed from the warp threads 15.
  • the disc 17 serves in known manner, together with other generally eccentrically arranged supports to effect movement of a filling needle (not shown) which carries the filling threads.
  • a reed 18 associated with the warp threads operates in conventional manner.
  • the harness control 12 is shown in detail in FIG. 3 to FIG. 6.
  • the pusher or lifting rod .19 can be adjusted in length to at least two different sizes by the deformation or kinking of linked parts. These sizes result in the corresponding harness positions, for instance, a low position and a high position.
  • the length of the pushers 19 is adjustable. As will hereinafter be described in detail, the control can be effected in such a manner that all known types and patterns of weave can be created.
  • the pushers 19 are moved by cams 20.
  • the pusher can have an elastic region, for instance one with springs which bend under load, in which connection, however, the bending can be prevented by holding means such as holding plates or the like and the lifting of the harness 11 is thus made possible.
  • the deformable region 24 has two stops on the two sides lying in the plane of deformation.
  • a fixed stop 28 (FIGS. 3 and 5) is provided on the machine frame. Its apex or nose end against which arm 25 abuts is so designed that the two arms 25 forming the deformable or kinkable region 24 cannot assume a completely longitudinally aligned position, but are held by contact against the stop 28 in a slightly bent position at an angle that is slightly less than 180. This pre bent position of the arms 25 makes possible a dependable and rapid bending to desired position. Movable auxiliary means can thus be entirely dispensed with.
  • another stop On the other side of the deformable region 24 opposed to the stop 28, another stop, as already mentioned, is provided. It is designated generally as 29 and is a movable stop. In the active position, i.e., in the blocked position, the stop 29 with its associated stop plate 30 lies within the bent path. Accordingly, bending at the deformable region 24 is prevented by holding the arms 25 between the stops 28, 29.
  • the stop plate 30 is so designed with respect to its length and position that the arms 25 when restrained by the stop plate 30 are retained in substantially longitudinal alignment with arms 21, 22 during the entire stroke of the pusher 19. It can be seen that when the pusher 19 is held locked by the stop plate 30, as above described, the left movement coming from the cam 20 is also transmitted to the upper end of the harness 11. If, on the other hand, the stop plate 30 is brought out of the path of movement of the deformable region 24, the two arms 25 will bend. As a result, the lift which is transmitted from the cam 20 to the lower upright arm 21 of the pusher 19 will be taken up by the deformable region 24 so that the upper upright arm 22 will not move.
  • the harness is retained in its raised position by a control pawl 33.
  • an electro-magnet 34 is used to move the pawl 33 into its active and inactive positions respectively.
  • the harness 11 In the active position of the pawl 33 the harness 11 is retained in its upper position. In the inactive position, the harness 11 is not held and can move unimpeded into its lower position.
  • the pawl 33 and the stroke length of the plunger (not shown) of magnet 34 and pawl 33 are both kept relatively small in order to obtain short actuating times and motion times.
  • the pawl 33 is arranged to be supported by fixed stop 35 mounted on the frame of the 100m.
  • the harness 11 can be held as long as desired in raised position, and by the actuation of the magnets 31 and 34 any pattern may be provided. Thus, the harnesses 11 can remain in their low position or be moved to a high position as desired.
  • the pusher 19 is not placed directly below the corresponding harness 11, but rather a harness yoke 36 is interposed. This is necessary since all the cams 20 are arranged on a single shaft and the individual harnesses 11 are located one behind the other in conventional manner. Furthermore, a harness yoke 36 is desirable since two cams 20 each having a separate pusher 19 can act on a single harness 11.
  • the dobby pattern cards have projections which can be used on the one hand to actuate the magnet 31 directly by way of an electrical contact and, therefore, to bring the harness 11 into raised position and, on the other hand, to actuate the holding magnet 34 and, therefore, to hold th harness 11 in its raised position. It is, therefore, necessary to provide two rows of dobby cards when a cam 20 and a pusher 19 are associated with the harness 11.
  • a control device for a machine having movable thread guide means comprising a cam, means to rotate said cam, a transmission element interposed between the cam and the thread guide means and operatively con nected thereto, to raise and lower said thread guide means, said transmission element comprising a pusher rod having a deformable portion between its ends, said deformable portion being movable laterally outwardly in one direction to change the effective length of said rod, by the force produced between the cam and the thread guide means and a stop associated with said deformable portion and movable into alignment therewith to restrain lateral movement thereof.
  • a control device in which a movable locking member is associated with said thread guide means to retain the latter in raised position.
  • a control device in which an electromagnet is operatively connected to said locking means to move the latter.
  • a control device in which a fixed stop is provided to support said locking means when it is in position to retain the thread guide means in raised position.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US575297A 1965-09-14 1966-08-26 Control device for movable thread guides Expired - Lifetime US3410314A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG0044670 1965-09-14

Publications (1)

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US3410314A true US3410314A (en) 1968-11-12

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US575297A Expired - Lifetime US3410314A (en) 1965-09-14 1966-08-26 Control device for movable thread guides

Country Status (7)

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US (1) US3410314A (enrdf_load_stackoverflow)
AT (1) AT282496B (enrdf_load_stackoverflow)
CH (1) CH475388A (enrdf_load_stackoverflow)
DE (1) DE1535222B1 (enrdf_load_stackoverflow)
GB (1) GB1148789A (enrdf_load_stackoverflow)
NO (1) NO122473B (enrdf_load_stackoverflow)
SE (1) SE313282B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4572247A (en) * 1982-10-26 1986-02-25 Textilma Ag Single heddle control device for a weaving machine having a shedding apparatus
US4957142A (en) * 1988-03-31 1990-09-18 S.A. Des Etablissements Staubli (France) Tension lever for negative dobby

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH635875A5 (en) * 1978-09-27 1983-04-29 Textilma Ag Apparatus for controllable thread deflection in a machine for the production of sheet-like textiles
GB8406466D0 (en) * 1984-03-13 1984-04-18 Guildford Kapwood Ltd Mechanism for effecting movement

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1904006A (en) * 1929-03-22 1933-04-18 Gardiner C Means Pattern control mechanism
US2354843A (en) * 1941-09-12 1944-08-01 Lefier Corp Control mechanism
CH246963A (de) * 1945-01-31 1947-02-15 Wassileff Nejko Schafthebevorrichtung für Webstühle.
US2693828A (en) * 1953-02-20 1954-11-09 Crompton & Knowles Loom Works Shedding mechanism for looms
DE925279C (de) * 1952-01-06 1955-03-17 Neumag Geschlossenfach-Schaftmaschine
GB825221A (en) * 1956-04-14 1959-12-09 Abdul Wasey Omar An electro mechanical warp control system for looms
US2980145A (en) * 1959-07-03 1961-04-18 Crompton & Knowles Corp Selective shedding mechanism for looms
US3080894A (en) * 1961-03-22 1963-03-12 Springs Cotton Mills Means for controlling loom harnesses
US3265096A (en) * 1963-02-13 1966-08-09 Oerlikon Buehrle Holding Ag Jacquard machine with individual electromagnetically controlled heddles

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1904006A (en) * 1929-03-22 1933-04-18 Gardiner C Means Pattern control mechanism
US2354843A (en) * 1941-09-12 1944-08-01 Lefier Corp Control mechanism
CH246963A (de) * 1945-01-31 1947-02-15 Wassileff Nejko Schafthebevorrichtung für Webstühle.
DE925279C (de) * 1952-01-06 1955-03-17 Neumag Geschlossenfach-Schaftmaschine
US2693828A (en) * 1953-02-20 1954-11-09 Crompton & Knowles Loom Works Shedding mechanism for looms
GB825221A (en) * 1956-04-14 1959-12-09 Abdul Wasey Omar An electro mechanical warp control system for looms
US2980145A (en) * 1959-07-03 1961-04-18 Crompton & Knowles Corp Selective shedding mechanism for looms
US3080894A (en) * 1961-03-22 1963-03-12 Springs Cotton Mills Means for controlling loom harnesses
US3265096A (en) * 1963-02-13 1966-08-09 Oerlikon Buehrle Holding Ag Jacquard machine with individual electromagnetically controlled heddles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4572247A (en) * 1982-10-26 1986-02-25 Textilma Ag Single heddle control device for a weaving machine having a shedding apparatus
US4957142A (en) * 1988-03-31 1990-09-18 S.A. Des Etablissements Staubli (France) Tension lever for negative dobby

Also Published As

Publication number Publication date
DE1535222B1 (de) 1970-04-23
AT282496B (de) 1970-06-25
SE313282B (enrdf_load_stackoverflow) 1969-08-04
NO122473B (enrdf_load_stackoverflow) 1971-06-28
GB1148789A (en) 1969-04-16
CH475388A (de) 1969-07-15

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