US3871412A - Reversible verdol jacquards - Google Patents

Reversible verdol jacquards Download PDF

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Publication number
US3871412A
US3871412A US395147A US39514773A US3871412A US 3871412 A US3871412 A US 3871412A US 395147 A US395147 A US 395147A US 39514773 A US39514773 A US 39514773A US 3871412 A US3871412 A US 3871412A
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United States
Prior art keywords
cam
driving shaft
shaft
rotation
jacquard
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
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US395147A
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English (en)
Inventor
Gabriel Servillat
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.)
Staeubli Verdol SA
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Verdol SA
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Filing date
Publication date
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/16—Verdol or other jacquards having intermediate power-operated needles between reading needles and lifting-hooks
    • 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
    • D03C2700/0127—Programme-controlled heald frame movement
    • D03C2700/0177—Devices for levelling the heald frames; Coupling and uncoupling the drive for the heald frames; Devices for holding the shed open

Definitions

  • the cam may carry a member having a radial slot which guides the free end of a connecting lever mounted on a lateral shaft parallel to but spaced from the driving shaft and rotatably carried by a support keyed on the driving shaft, the said lever rotating between two end positions at each of which it is substantially perpendicular to the slot.
  • Rotation of the lateral shaft may be obtained by means of a planet pinion carried by the said lateral shaft to cooperate with a sun gear loosely mounted on the driving shaft, this gear being retained against rotation by locking means which are automatically released when the driving shaft has rotated through a predetermined angle after reversal of its rotation.
  • the cam system loosely mounted on its driving shaft, has a substantially radial guide which receives the end ofa lever pivotally carried by a support keyed on the shaft, in such manner as to rotate on this support about an axis substantially paral' lel to, but spaced from the axis of the shaft, while means are provided which, when the rotational direction of the shaft is reversed, cause the said lever to rotate through such an angle that the cam system is angularly displaced as required on the shaft.
  • the lever driving means may conveniently comprise a planet pinion keyed on the shaft of the lever and meshing with a sun gear loose on the cam system driving shaft, and a device adapted to maintain the said sun gear stationary for an appropriate time whenever the rotation of the cam supporting shaft is reversed.
  • This device may be formed of a brake or ofa locking mecha nism. It may be released automatically when the cam system has rotated on the driving shaft through the angle required, or in the case of a brake it may remain in action provided the torque which it develops is small enough to cause no overload to the jacquard during normal running.
  • FIG. I is a general longitudinal section of a mechanism according to the invention.
  • FIG. 2 is a quite diagrammatical perspective view illustrating the relations between the 'various parts of the mechanism.
  • FIG. 3 is a cross-section corresponding to line III-III of FIG. 1, the parts being illustrated at the position which corresponds to the normal or forward running.
  • FIG. 4 is a cross-section taken along line lV--IV (FIG. 1).
  • FIG. 5 reproduces FIG. 3, but theparts being shown during backward running.
  • reference numeral 40 designates the shaft of the jacquard on which the pusher grid driving cam 41 is looselymounted.
  • this cam acts on a follower roller carried by the free end of a lever 43 keyed on an oscillating shaft 47 connected with the pusher grid by a rod-and-Iever gearing in the conventional manner.
  • Roller 80 may be urged towards cam 41 by a spring or the cam may be of the constant diameter type acting on two opposed rollers, as usual in high-speed Verdol jacquards.
  • a circular plate 81 is secured to cam 41 co-axially thereto by means of screws such as 82. Cam 41 and plate 81 thus form a single unit loosely mounted on shaft 40 by means of a bushing 83.
  • Plate 81 has a radial slot 81a (see also FIG. 3) which terminates short of its periphery, this slot forming a guide for a roller 84 carried by a connecting lever 85 the other end of which is fixed onto a lateral shaft 86 (FIG. 1) spaced from but parallel to the driving shaft 40 and rotatably supported by a flat circular support 87 keyed on shaft 40 by means of a cotter pin 88.
  • the end of the lateral shaft 86 opposed to roller 84 carries a pinion 89 beyond which it extends in the form of a projecting end 86a (FIGS. 1 and 2).
  • Pinion 89 cooperates as a planet gear with a sun gear 90 carried by a sleeve 91 loose on shaft 40.
  • This sleeve also supports the hub 92 of a double locking mechanism which will be described below, the said hub being secured to gear 90 by screws such as 93.
  • Hub 92 is surrounded by a ring 94 secured by screws such as 95 (FIG. 1) to a disc 96 loosely mounted on shaft 40 by means of a bushing 97. This disc is maintained against rotation in any appropriate manner, as for instance by means of an arm 98 (FIG. 2) secured to the frame of the jacquard.
  • FIG. 4 shows the detail of the double locking mechanism.
  • hub 92 is formed with two peripheral recesses having in transverse section the shape of two opposed elongated right-angled triangles with their smaller sides directed substantially radially and separated by an intermediate unrecessed portion 92a of relatively small angular extension.
  • Each recess thus determines a cam surface 92b which extends from the intermediate portion 92a towards the periphery of the hub.
  • a roller 99 resiliently urged along cam, surface 92b by a pusher 100 which slides in a blindbore of the intermediate portion 920 under the action of a spring 101.
  • each depression with its roller 99, its cam surface 92b and the inner periphery of ring 94 forms a freewheel mechanism well known in the art, which permits free rotation of hub 92 in one direction but prevents it from rotating in the other direction. Since the two depressions are opposed to each other, hub 92 is normally wholly locked with respect to ring 94.
  • Each roller 99 may be pushed against the action of the corresponding spring 101 by an arcuate releasing lever I02 pivoted on a pin 103 carried by hub 92, the said lever being in one with an arm 104 which extends outwardly and substantially radially beyond ring 94 for cooperation with the above described extension 86a. Arms 104 are urged towards each other by a spring 105 which thus tends to move the inner ends of levers I02 away from rollers 99.
  • this angle 211 may correspond to the angular displacement of the cam which is required for proper backward operation of the jacquard.
  • the angular displacement of gear 90 with respect to support 81 is limited by an arcuate slot 9% (see .more particularly FIG. 2) formed in the gear, this slot receiving a pin 111 carried by the support.
  • This limitation of the relative angular displacement of gear 90 with respect to support 81 duplicates of course the effect of the closed outer end of the radial slot 81a which limits the outward movement of roller 84.
  • pinion 89 only rolls along a limited portion of the periphery of gear 90 which may therefore be replaced by a mere toothed sector.
  • gear 90 could be submitted to the action of an electric brake which would be released by appropriate contacts so arranged, as for instance on 'gear 90 and on support 87, as to release the brake as soon as the angular displacement required is obtained.
  • gear 90 could permanently receive the action of a frictional brake which would develop a sufficiently low braking torque in order not to apply an excessive load on shaft 40 during normal running. It will.
  • roller 84, slot 81a and lever 85 could be replaced by any other equivalent gearing, as for instance by a cam mounted on shaft 86 and acting on appropriate follower members carried by plate 81, by a radial fork and a pin slidable therein, etc..
  • the jacquard may comprise more than a single cam such as 40, these cams being angularly fixed with respect to each other, as for instance by being mounted on a common tubular shaft loosely supported by the driving shaft 30.
  • said cam being carried by a driving shaft on which it is selectively displaceable between a first angular position corresponding to forward operation of' the jacquard and a second position corresponding to backward operation thereof
  • said jacquard further comprises means responsive to the direction of rotation of said driving shaft and acting on said cam to displace same angularly thereon from said first angular position to said second angular position when said direction is reversed from normal forward rotation to backward rotation and to retain said cam at said second angular position during said backward rotation, and to displace said cam angularly on said shaft from said second angular position to said first angular position when said direction is again reversed from backward rotation to normal forward rotation and to retain said cam at said first angular position during said forward rotation, said means comprising:
  • a lateral shaft rotatably carried by said support, said lateral shaft being substantially parallel to but spaced from said driving shaft;
  • said means to cause rotation of said lateral shaft comprising:
  • said retaining means comprising:
  • first and second locking means interposed between said hub member and said crown to prevent rotation of said hub member respectively in one and the other directions;
  • said retaining means comprising a brake to apply to said toothed sector a reduced permanent braking torque.
  • said guiding means including a member having a radial slot
  • said connecting lever having at its free end a follower member displaceable in said slot;
  • said slot having a closed end to limit the angular displacement of said connecting lever and of said lateral shaft with respect to said support.
  • a Verdoljacquard comprising at least one cam adapted to actuate the pusher grid horizontally, the said cam being rotatably carried by a reversible driving shaft on which it is angularly displaceable with respect to said shaft between a first fixed position which it oc cupies during forward operation of the jacquard and a second fixed position which it occupies during backward operation thereof, the improvement comprising:
  • connecting means interposed between said cam and said support member and including lever means displaceable selectively into either of two opposed orientations, one orientation maintaining the cam in said first fixed position and the other orientation maintaining the cam in said second fixed position; and means carried by the shaft responsive to reversals in its direction of rotation and coupled to said connecting means and operative when the shaft reverses from forward to backward rotation to displace said lever means and move said cam into the second position, and operative when the shaft reverses from backward to forward rotation to displace said lever means and move the cam into the first position.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Transmission Devices (AREA)
US395147A 1972-10-16 1973-09-07 Reversible verdol jacquards Expired - Lifetime US3871412A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7237167A FR2209000B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-10-16 1972-10-16

Publications (1)

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US3871412A true US3871412A (en) 1975-03-18

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US395147A Expired - Lifetime US3871412A (en) 1972-10-16 1973-09-07 Reversible verdol jacquards

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US (1) US3871412A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS4975864A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2351921A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2209000B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT995891B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060236797A1 (en) * 2003-12-16 2006-10-26 Johny Debaes Driving device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5178863A (en) * 1974-12-28 1976-07-09 Yamada Dobby Co Ltd Dobiikini okeru kaadogyakuten oyobi kutensochi
DE3113487C1 (de) * 1981-04-03 1982-11-04 Maschinenfabrik Carl Zangs Ag, 4150 Krefeld Rücklaufeinrichtung für Jacquardmaschinen
FR2542335B1 (fr) * 1983-03-09 1985-08-02 Alsacienne Constr Mat Tex Procede et dispositif pour supprimer, sur les tissus, les defauts consecutifs a l'arret de la machine a tisser
DE3639199A1 (de) * 1986-11-15 1988-06-01 Schleicher Oskar Fa Vorrichtung zur phasenverschiebung des einlesezeitpunktes der platinen von fachbildemaschinen, insbesondere jacquardmaschinen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096792A (en) * 1960-04-19 1963-07-09 Strach Lothar Jacquard machines
US3356109A (en) * 1967-12-05 Driving mechanisms for loom jacquards
US3450168A (en) * 1966-07-08 1969-06-17 Zangs Ag Maschf Device for turning off the vertical movement of the printing bar or grid during the return movement of a double-stroke jacquard machine
US3732895A (en) * 1970-06-26 1973-05-15 Grosse Gmbh Reversible jacquard loom and reversing mechanism therefor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR790707A (fr) * 1934-08-25 1935-11-26 Lyonnaise Des Machines Textile Perfectionnement aux mécaniques d'armures et mécaniques jacquard

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356109A (en) * 1967-12-05 Driving mechanisms for loom jacquards
US3096792A (en) * 1960-04-19 1963-07-09 Strach Lothar Jacquard machines
US3450168A (en) * 1966-07-08 1969-06-17 Zangs Ag Maschf Device for turning off the vertical movement of the printing bar or grid during the return movement of a double-stroke jacquard machine
US3732895A (en) * 1970-06-26 1973-05-15 Grosse Gmbh Reversible jacquard loom and reversing mechanism therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060236797A1 (en) * 2003-12-16 2006-10-26 Johny Debaes Driving device
CN1644961B (zh) * 2003-12-16 2011-02-23 米歇尔·范德威尔公司 驱动装置

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Publication number Publication date
DE2351921A1 (de) 1974-04-18
IT995891B (it) 1975-11-20
JPS4975864A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-07-22
FR2209000A2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-06-28
FR2209000B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-03-28

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