US3734142A - Shuttleless loom - Google Patents

Shuttleless loom Download PDF

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Publication number
US3734142A
US3734142A US3734142DA US3734142A US 3734142 A US3734142 A US 3734142A US 3734142D A US3734142D A US 3734142DA US 3734142 A US3734142 A US 3734142A
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United States
Prior art keywords
casing
batten
secured
frame
shaft
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Expired - Lifetime
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English (en)
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R Dewas
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Individual
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Individual
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Publication of US3734142A publication Critical patent/US3734142A/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms

Definitions

  • the invention relates to weaving looms with weft supply by large spools located outside the shed, said looms being provided with. at least one weft inserter at the extremity of a tape to which a reciprocating movement is imparted by a mechanism terminating in a toothed wheel which meshes with perforations of said tape.
  • the invention is more especially directed to looms in which the alternating movement of rotation of the tape-driving wheel results from amplification of the oscillating movement of a toothed sector in meshing relation with a pinion which forms a two-stage gear system in conjunction with said wheel, said sector being carried by a lever which is usually extended beyond its pivotal axis by an arm which carries a single or double roller, said roller being controlled with very high precision by the groove of a cam which carries out a uniform movement of rotation within a closed casing containing oil in which the cam is immersed.
  • the tape moves within guides which are rigidly fixed to the slay and the mechanism for actuating the tape from the cam which is disposed within the closed casing takes part in the oscillating motion of the batten about the driving shaft of the cam by means of a frame comprising inclined legs which are fixed at the lower ends thereof on the top of the casing.
  • the object of this invention is to endow said oscillat ing assembly with the maximum degree of rigidity.
  • the weaving loom in accordance with the invention is characterized in that the complete assembly which comprises the body of the cam casing, the connection between the casing and the batten, the bearing which supports the pivotal shaft of the lever which carries the toothed sector as well as its connection with said casing and with the batten is constructed in the form of a'one-piece unit, that is to say a single part.
  • the batten 1 oscillates about a horizontal shaft2 which is carried by the frame 3 of the loom.
  • the tape 4 the front end of which is not visible in the drawing, carries the weft inserter and is endowed with a reciprocating movement by a toothed wheel 5 which meshes with perforations of the tape and forms together with a pinion 6 an assembly which is freely mounted on a shaft 7 and actuated by an oscillating toothed sector 8 carried by a lever 13 which comprises a hub 13b pivotally mounted on a stub shaft 18 located at right angles to the shaft 2 and secured in a bearing 19.
  • Said tape is guided within the shed by a succession of small guides 9 outside the shed, said tape is first transferred within a rectilineal slideway 10, then within an arch 11 by which it is guided and returned to a point beneath the slay at which said tape is received in a conduit 12.
  • the lever 13 carries out in known manner an oscillat ing movement which is obtained from a cam 14 having a groove 15 of approximately sinusoidal shape in which is engaged a cam-following roller 16, said roller being mounted for free rotational motion at the end of a lower arm 13a which forms an extension of the lever 13.
  • the cam 14 is keyed on the shaft 2 which is driven in continuous rotational motion by means which are not illustrated.
  • the cam 14 which is immersed in oil and the arm 13a move within the interior of a sealed casing 17 which is freely mounted. for pivotal motion on the shaft 2.
  • the casing 17 has upward extensions in the form of lateral upright members 20 located on each side of a flat web 21 provided with stiffening end-ribs 22.
  • the web 21 and the ribs of this latter are joined to an upper return portion forming a flange 23 which carries the rectilineal slideway 10 of the tape 4 and beneath which is fixed the batten 1.
  • the casing 17 is provided on the front face thereof with an opening 25 which is closed by a cover 26 (which is assumed to have been removed in FIG. 1) and the lower portion 27 of the casing has a raised portion in order to contain the lubricant when the cover is removed for the purpose of inspecting the components which are located within the casing
  • the rear face of the casing is provided with a wide opening 28 which provides ready access to the interior and which is closed by a cover 29.
  • the cam is inserted through said rear opening 28.
  • the distance between the front and rear faces of the casing 17 which is constituted by the lower portion of the single part is substantially reduced with respect to the corresponding size of the casing in the arrangement which was adopted in the prior art this reduction in size has the advantage of facilitating moulding and machining of this unit. It will be understood that the principle of the single part is applicable to a casing which is open only on the front side.
  • Ribs 30 located inside the casing as well as the corresponding portion of the ribs 22 and also the ribs 24 pro- 1 vide the top portion of said casing with a very high degree of rigidity between the bearings of the shaft 2 and the bearing 19 this has the effect of preventing deformations under the action of the axial components of forces between the groove of the cam 14 and the roller 16 of the arm 13a of the lever 13 invariability of the precise axial position of the cam with respect to the stub shaft 18 of the lever 13 is accordingly ensured.
  • the assembly which is formed by the casing 17, the bearing 19, the lateral upright members 20 and the rigid web 21 which is suitably ribbed and on which the slay is fixed constitutes a single one-piece part.
  • the upper portion of the single part comprises lateral extensions 22a, with the result that said single part is secured over a substantial distance to the batten l which is extended for this purpose and also in order to receive the arch 9 at the end of said batten.
  • the extension of the batten 1 up to the arch 11 has the important advantage of eliminating the articulation effect which, in the known arrangement adopted in the prior art, resulted in the short attachment of the oscillating frame to the end of the batten, the length of which was of substantially smaller value.
  • the elements for transmitting the movement of the toothed sector 8 to the tape 4 are supported on the one hand by the web 21 and on the other hand by a bearing 31 which is secured to the batten 1.
  • connections are provided by means of uninterrupted walls which are oriented in the most favorable direction for transmission of forces and which can have substantial dimensions. This also makes it possible to dispense with any need for the machining operations which would otherwise be necessary for the difficult assembly of the separate casing and frame.
  • the cam casing 17 which was previously provided with an opening only on its front face 25 and closed by a cover 26 can also have an opening on the rear side 28 and is closed in this case by a cover 29, t
  • this arrangement facilitates positioning of the cam 14 which is of substantial mass by virtue of the fact that the rear opening 28 is larger than the front opening 25 owing to the raised bottom edge 27 of said front opening 25.
  • this concept makes it possible to obtain from a single casting pattern either a part for the right-hand portion of the loom or a part from the left-hand portion.
  • the rectilineal slideway 10 is secured by means of an intermediate member.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US3734142D 1970-07-21 1971-07-15 Shuttleless loom Expired - Lifetime US3734142A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU61379 1970-07-21

Publications (1)

Publication Number Publication Date
US3734142A true US3734142A (en) 1973-05-22

Family

ID=19726427

Family Applications (1)

Application Number Title Priority Date Filing Date
US3734142D Expired - Lifetime US3734142A (en) 1970-07-21 1971-07-15 Shuttleless loom

Country Status (8)

Country Link
US (1) US3734142A (enrdf_load_stackoverflow)
BE (1) BE770243A (enrdf_load_stackoverflow)
CA (1) CA945871A (enrdf_load_stackoverflow)
CH (1) CH542301A (enrdf_load_stackoverflow)
ES (1) ES394107A1 (enrdf_load_stackoverflow)
FR (1) FR2099494B1 (enrdf_load_stackoverflow)
GB (1) GB1322675A (enrdf_load_stackoverflow)
LU (1) LU61379A1 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951178A (en) * 1974-12-13 1976-04-20 Cox Foundry And Machine Co. Shuttleless loom
DE2637818A1 (de) * 1975-09-19 1977-03-24 Picanol Nv Verbesserte webmaschinenlade
US4111240A (en) * 1977-01-03 1978-09-05 Bob Mallard Enterprises, Inc. Loom drive mechanism

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1204675B (it) * 1987-06-03 1989-03-10 Colombo Filippetti Srl Dispositivo per la trasformazione di un moto rotatorio uniforme in un moto rotatorio alternativo,particolarmente adatto per telai tessili
DE4233636A1 (de) * 1992-10-06 1994-04-07 Sulzer Ag Vorrichtung zum Antreiben eines Greiferbandes und Greiferwebmaschine mit einer derartigen Vorrichtung
EP0826807A1 (en) * 1996-09-02 1998-03-04 Cheng, Chuan-tien Apparatus for driving a carriage of a shuttle in a weaving loom

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951178A (en) * 1974-12-13 1976-04-20 Cox Foundry And Machine Co. Shuttleless loom
DE2637818A1 (de) * 1975-09-19 1977-03-24 Picanol Nv Verbesserte webmaschinenlade
US4111240A (en) * 1977-01-03 1978-09-05 Bob Mallard Enterprises, Inc. Loom drive mechanism

Also Published As

Publication number Publication date
ES394107A1 (es) 1976-01-01
CH542301A (fr) 1973-09-30
FR2099494A1 (enrdf_load_stackoverflow) 1972-03-17
GB1322675A (en) 1973-07-11
LU61379A1 (enrdf_load_stackoverflow) 1970-09-21
BE770243A (enrdf_load_stackoverflow) 1971-12-01
FR2099494B1 (enrdf_load_stackoverflow) 1974-03-29
CA945871A (en) 1974-04-23

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