US3322160A - Device for controlling movement of a drop box on a loom - Google Patents

Device for controlling movement of a drop box on a loom Download PDF

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Publication number
US3322160A
US3322160A US464737A US46473765A US3322160A US 3322160 A US3322160 A US 3322160A US 464737 A US464737 A US 464737A US 46473765 A US46473765 A US 46473765A US 3322160 A US3322160 A US 3322160A
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Prior art keywords
drop box
positions
loom
positioning
lever
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Expired - Lifetime
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US464737A
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English (en)
Inventor
Lutz Friedrich
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Ruti Machinery Works Ltd
Maschinenfabrik Rueti AG
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Maschinenfabrik Rueti AG
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D43/00—Looms with change-boxes

Definitions

  • the present invention relates to a device for controlling movement of a drop box on a loom which is adapted to be positioned in various picking positions by a drop box motion, and in particular to a device providing a coupling means having a working position in which said drop box motion is normally coupled to said drop box during operation of the loom.
  • a special shuttle is provided for each thread or yarn sort.
  • the drop box for carrying the shuttles in the rest positions has a separate compartment for each individual shuttle. The insertion of the various threads as picks is effected in accordance with a pre-determined program which fixes the alternate settings for operation of the various shuttles.
  • This operation is effected in such manner that the various compartments of the drop box are, according to the program, moved into a working position so that the desired shuttle sequence or the prescribed sequence of threads may be accomplished.
  • the pre-determined program may be determined by punched cards.
  • the invention is characterized in that the coupling means has, on both sides of its working position, positioning positions corresponding .to the number of maximum possible picking positions of the drop box into which the drop box can be changed; the working position and the positioning positions provide stable coupling states and the locations between these positions form unstable coupling states.
  • the invention is also characterized in that an indicator means is provided which, when the coupling means is moved out of its working position, supplies an indication or signal to actuate a shut-oil device which stops the weaving loom.
  • the coupling means permits deflection to another stable coupling state. In this manner, the coupling means automatically again positions the drop box in one of the stable positioning positions so that when the picking motion follows, the drop box is in a proper position for picking. Finally, the coupling means is so designed that each time a deflection has taken place, an indication is given which is used for stopping the loom.
  • FIGURE 1 shows a diagrammatic lateral view of a device having coupling means according to the invention
  • FIGURE 2 shows a front elevation of the drop box
  • FIGURE 3 shows a diagrammatic lateral view of a variant of the coupling means according to the invention.
  • FIGURE 4 shows a diagrammatic lateral view of a further embodiment of the invention.
  • FIGURE 1 shows a drop box motion 11, which has two pivots 12 and 13 that rotate and, depending on the orders of a punch card (not shown), displace cranks 14 and 15 connected therewith into the position shown or into the position rotated through relative thereto.
  • cranks 14 and 15 as FIGURE 1 shows, rods 16 and 17 are coupled in such manner as to be pivotal about the pivots 18 and 19, respectively.
  • Pivots 18 and 19 are connected to the two-armed lever 22 in such manner as to be pivotal about the pivots 20 or 21, respectively.
  • Lever 23 carries the two-armed lever 22 through the agency of a pivot 24 and is pivotal about a pivot 30 (which is secured on a fixed portion 25 of the machine frame).
  • Pivotal about the pivot 24 is a connecting rod 26 that connects the drop box motion 11 with the transmission coupling means 27.
  • Said coupling means comprises a rotary body 29 which is rotatable about a pivot 28 and which on the one hand comprises a circular-sector body with grooves 60 and 61 and on the other hand comprises an arm 29.
  • the connecting rod 26 is secured by means of a pivot 32 to the outer end of arm 29'.
  • Pivot 28 is secured to the machine frame by means of a carrier 31.
  • a twoarmed lever 34 is mounted in such manner as to be pivotal about a pivot 33 on a carrier 32 which is also secured to the machine frame. Lever 34 is subjected to an anticlockwise rotational force by'means of tension spring 35.
  • the pivot 38 holds a lever 40, which is also pivotal about pivot 28 and to which a carrier rod 41 is secured.
  • a drop box 42 Secured to :the upper endof the carrier rod is a drop box 42.
  • the drop box has compartments 43 to 46, inclusive, with shuttles 43' to 46, inclusive, being disposed in each of said compartments.
  • guides 79 which are secured to the loading frame, are provided.
  • Carrier rod 41 has jointed connections 91 and 92, respectively, at its ends.
  • a control rod 48 Secured on the two-armed lever 34 is a control rod 48 which is so mounted as to be pivotal about pivot 47.
  • the control rod actuates a rod 55 rotatably mounted on connecting member 54.
  • Rod 55 has a projection 51 engaged on a holding member 56.
  • the holding member is secured to an actuating lever 52 which is retained in its position by means of a retaining lever 57.
  • the retaining lever is tensioned by tension spring 68, with the projection 65 holding the projecting arm 67 secured to actuating lever 52.
  • spring 53 endeavors to release drive coupling 59, which couples the driving motor :to the main shaft of the loom and thereby acts to separate the drive from the weaving loom.
  • drive coupling 59 couples the driving motor :to the main shaft of the loom and thereby acts to separate the drive from the weaving loom.
  • FIGURE 2 shows a front elevation of drop box 42 with the shuttles 43' to 46 contained therein. Furthermore, this figure shows a sley 62 and a run-in member 63 for guiding of the shuttles.
  • cranks 14 and 15 In the operation of the device described hereinabove, the control of the punched card causes pivots 12 and 13 of thedrop box motion 11 to position cranks 14 and 15 in the position illustrated or in the position rotated through 180 relative thereto. If, for example, crank 14 is in the illustrated position and crank 15 is in the position rotated by '180 about the pivot 13 relative thereto, then this brings about a displacement of the pivot 21 toward the right.
  • pivot 24 The movement of pivot 24 is transferred to rotary body 29 via connecting rod 26.
  • the four different positions (mentioned hereinabove) of the pivot 24 correspond to'difierent angular positions of the rotary body. Since roller 39- is pressed into groove 60 by means of spring 35, it will be appreciated that, when the rotary body rotates, roller 39, the angle lever with arms 37a and 37b, the pivot 38and the lever 40 together with carrier rod and the drop box are constrained. In this way, an adjustment'of the drop box in accordance with the control provided by the punched card is achieved.
  • the shape of the arcuate travel curve 50 at the end portio-n of arm 37a is so selected that in each of the dilferent angular positions of the rotary body and of lever 40, lever 34 does I not 'vary its angular position as in groove 60.
  • the indication is used for lifting of rod 55, that is, for rotating the connecting member 54, so that projection 51 is released from engagement withrthe holding member 56 and, consequently, the tension spring 53 is released.
  • the spring is thus able to rotate the two-armed lever 58 clockwise so that the drive coupling 59 between the loom-driving motor and the loom is interrupted.
  • braking means which are not shown,.immediate braking of the machine is initiated.
  • the drive coupling is again switched on by actuating lever 52. Actuation of lever 52 is possible inasmuch as its fixe position has been released by retaining lever 57.
  • the drop box may always pass into a rest position which has been prescribed for a picking motion, thereare, as the above example shows, on both sides of the working position as many positioning positions available as there sitioning positions must be provided upwardly from the working position on the rotary body 29. If the drop box were tobe in its lowermost position, there would be three box or picking positions located above intowhich the drop box could be ordered to travel by instructions on thepunched card. Thus, for this case, it is also necessary to provide three positioning grooves 61 on the lower half of the rotary body 29.
  • the positioning grooves 61 are made shallower than the working groove 60.
  • the drop box is then adjusted precisely in its picking position prescribed for the actuation of the shuttle by the restored pressure on roller 39 produced by the spring 35. In this manner, easy takeout and introduction of the shuttles is made possible.
  • a stop 66 is provided in order that lever 34 may not be rotated farther than is necessary.
  • FIGURE 3 shows a further embodiment of a transmission coupling means.
  • Connecting rod 26 secured to the drop box motion is again pivotal about pivot 32 and is connected with rotary body 29, whereby a reciprocating movement of rod 26 produces a rotary movement of body 29 about pivot 28.
  • roller 39 which is pressed by a compression spring 71 into working groove 60, and lever arm 40 connected with the roller via a connecting member 72 are also moved about the pivot 28.
  • the connecting member is secured on the lever arm in such manner as to be pivotal about pivot 69.
  • FIGURE 3 the mode of operation of the coupling means shown in FIGURE 3 is similar to that of the coupling means shown in FIGURE 1.
  • a dilference resides in the arrangement for the pressingon of the roller against the rotary body. This difference is due to the fact that, instead of a mechanical indicator device for indicating when the roller 39 is no longer in working groove 60, according to FIGURE 3 an electrical indicating device is provided.
  • This indicating device comprises a pin 73 which is movable in its longitudinal direction and which is secured to a contact member 74.
  • a spring 75 endeavors to press the contact member toward the right, that is in the direction of the roller.
  • roller 39 is moved out of working groove 60.
  • the roller will, due to the force exerted by spring 71, descend to the lowest portion of a position groove 61 in consequence of which, not the desired shuttle but one of the shuttles or one compartment of the shuttle box is put in a correct posiiton for the picking motion. By this means, damage to the loom or parts is prevented.
  • FIGURE 4 shows a further embodiment of the present invention. Those parts which are identical with parts of FIGURE 1 have again been given the same reference numerals.
  • a horizontal movement of connecting rod 26 produces, via the connection through the agency of pivot 32, a pivoting movement of lever 80 about the pivot 28 secured on stationary carrier 31.
  • a movable body 81 formed with a groove 60 defining the working position and with grooves 61 defining positioning positions, said movable body being secured by a sliding and retaining arrangement having a slot 82 and pins 83 sliding therein.
  • the movable body is provided with a slot 84 which together with a guide plate 85 secured to the sley frame provides for the rectilinear guiding.
  • Both ends of the movable body 81 have sliding and retaining means 86 in which a carrier rod 41 is able to slide. Furthermore, there is a wedge or biased member 87 which ispressed outwardly in a guide 89 by means of a compression spring 88. The carrier rod is secured to the guide 89. A pin is secured to the Wedge. The pin transmits its movement to a Bowden cable 95 via an angle lever 94 that is pivotal about pivot 93.
  • the spring 88 is so pre-tensioned that, under normal operational conditions, an upward and downward movement of the movable body contains the wedge 87 and also the carrier rod 4-1 with drop box 42. If for any reason whatsoever the resistance to the upward or downward movement of the drop box becomes excessive, the wedge is pressed toward the right and, as the carrier rod slides in means 86, only body 81 is moved. Under these circumstances, wedge 87 is moved out of the working groove 60 and takes up its position in one of the positioning grooves 61. Consequently, at the instant of the following picking motion, one of the compartments 43 to 46 is in one of the positions prescribed for the picking. It will be appreciated that, due to the pressure of the spring 88, the wedge is forced into the lowest position in one of the grooves 60 or 61 since only these lowest positions are stable.
  • the working groove 66 is also deeper than the positioning groove 61. In this Way, it becomes possible to utilize the indication provided by the Bowden cable in such manner that each position of the wire 96 which does not correspond to the maximum insertion of wedge 87 in groove 60 is utilized as a signal for stopping the loom. Re-starting the loom with the drop box wrongly positioned is thereby avoided.
  • a further variant for producing an indicating signal is obtained with a coupling means wherein, in contradistinction to the example of FIGURE 3, groove 60 is not provided with a contact. Instead, there are contacts that can be actuated by roller 39, at least in the positioning grooves 61 adjacent the groove 60 and preferably in all the positioning grooves 61.
  • the evaluation of the indication obtained from these contacts is such that the actuation of one of these contacts produces a signal or a signal change by means of which another device is actuated for uncoupling the loom from the drive and exerting a braking action thereon.
  • a device for controlling movement of a drop box adapted to be positioned in various picking positions by movement of a drop box motion which comprises coupling means operably associated with said drop box motion for positioning said drop box, said coupling means having a working position in which it is normally coupled to said drop box operation of said loom and also having positioning positions on both sides of said working position, the number of positioning positions corresponding to the maximum number of possible picking positions into which the drop box can be changed, the working position and the positioning positions forming stable coupling states and the locations between these positions forming unstable coupling states, means for allowing said coupling means to shift to one of said positioning positions when movement of said drop box is hindered, and an indicator means which supplies an indication for actuating a shutofi mechanism for stopping the loom when the coupling means is coupled to said drop box in one of said positioning positions.
  • a device in which the Working position has a design that differs from that of the positioning positions, the difference in the design being utilized for producing said indication.
  • a device for controlling movement of a drop box adapted to be positioned in various picking positions by movement of a drop box motion which comprises coupling means operably associated with said drop box motion for positioning said drop box, said coupling means having a working position in which it is normally coupled to said drop box during operation of said loom and also having positioning positions on both sides of said working position, the number of positioning positions corresponding to the maximum number of possible picking positions into which the drop box can be changed, the working position and the positioning positions forming stable coupling states and the locations between these positions forming unstable states; said coupling means comprising at least two movable parts, a first part being adapted to be actuated by the drop box motion and a second part being coupled with the drop box, one of said parts providing the working position and the positioning positions and the other part having means for biasing it towards said one part whereby retaining arrangements are provided between said parts for allowing said coupling means to shift to one of said positioning positions when movement of said drop box is hindered and an indicator means'which supplies an indication
  • a device in which a foot pedal, when actuated, releases the biased retaining arrangements between the parts of said coupling means for allowing manual adjustment of the drop box between the stable positions of said coupling means.
  • a device in which one of said parts has a first groove forming the working position and additional grooves forming the positioning positions on either side of said first groove and said other part includes a biased member adapted to be pressed into each of said corresponding to the working position is deeper than the grooves corresponding to the positioning positions, and the indicator means supplying the indication comprises a linkage means which is coupled with the member which is adapted to be inserted, whereby said linkage means controls an indicating mechanism in dependence on the insertion depth of the member.
  • a device in which said member is a roller pressed against the grooves by a resilient means.
  • a device in which one of said parts has said grooves on its periphery and is pivotable about a pivot and the other part includes an arm jointedly secured to said member and pivotable about said pivot, said member being pressed by a resilient means against said grooves so as to provide a reciprocal coupling of the parts.
  • a device for controlling movement of a drop box adapted to be positioned in various picking positions by movement of a drop box motion which comprises coupling means operably associated with said drop box motion for positioning said drop box, said coupling means having a working position in which it is normally coupled to said drop box during operation of said loom and also having positioning positions on both sides of said working position, the number of positioning positions corresponding to the maximum number of possible picking positions .into which the drop box can be changed, the working position and the positioning positions forming stable coupling states and the locations between these positions forming unstable coupling states, said coupling means having at least two movable parts, a first part being adapted to be actuated by the drop box motion and a second part being coupled with a drop box, one of said parts having a first groove forming the working position and additional grooves forming the positioning positions on either side of said first groove; and the other of said parts comprising a member biased by resilient means and adapted to be inserted in each of said grooves, whereby one of said
  • said linkage means comprises a movable lever by which said member is pressed-on by said resilient means; movement of said lever serving as the indication for actuating saidshut-oif mechanism.
  • said linkage means comprises a pressure member which, when it is moved out of its normal position, actuates an electrical contact for producing indication that actuates said shutoff mechanism.
  • a device according to claim 12 in which the member in the working position holds an electrical contact closed by pressure on the pressure member.
  • a device in which a pressure member is located in at least each of the positioning positions adjacent the working position, whereby, in the event of the movement out of its normal position, said pressure member actuates an electrical contact for producing the indication that actuates said shut-off mechanism.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US464737A 1964-06-18 1965-06-17 Device for controlling movement of a drop box on a loom Expired - Lifetime US3322160A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH801564A CH414490A (de) 1964-06-18 1964-06-18 Einrichtung zum wahlweisen Einstellen eines Steigkastens an einer Webmaschine

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US3322160A true US3322160A (en) 1967-05-30

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE54178C (de) * O, HÖRENZ in J^adeiejjd-Dresden,. Meifsnerstr. 80 Je Zugregler
US554258A (en) * 1896-02-11 Shuttle-box-supporting rod
DE655321C (de) * 1935-10-29 1938-01-13 Carl Zangs Akt Ges Maschf Vorrichtung zum Ausschalten der Schlagfallen
US2523648A (en) * 1949-04-08 1950-09-26 Crompton & Knowles Loom Works Stop mechanism for shifting shuttle box looms
DE859579C (de) * 1950-05-16 1952-12-15 Herold & Co K G Eisengiesserei Sicherheitsvorrichtung gegen Schlaegerbruch bei Steigkastenwebstuehlen
US2717008A (en) * 1953-05-18 1955-09-06 Charles W Moss Electric stopping mechanism for shifting shuttle box looms

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE54178C (de) * O, HÖRENZ in J^adeiejjd-Dresden,. Meifsnerstr. 80 Je Zugregler
US554258A (en) * 1896-02-11 Shuttle-box-supporting rod
DE655321C (de) * 1935-10-29 1938-01-13 Carl Zangs Akt Ges Maschf Vorrichtung zum Ausschalten der Schlagfallen
US2523648A (en) * 1949-04-08 1950-09-26 Crompton & Knowles Loom Works Stop mechanism for shifting shuttle box looms
DE859579C (de) * 1950-05-16 1952-12-15 Herold & Co K G Eisengiesserei Sicherheitsvorrichtung gegen Schlaegerbruch bei Steigkastenwebstuehlen
US2717008A (en) * 1953-05-18 1955-09-06 Charles W Moss Electric stopping mechanism for shifting shuttle box looms

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CH414490A (de) 1966-05-31
BE665581A (de) 1965-10-18

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