US3889723A - Weaving machine comprising shuttle braking means - Google Patents

Weaving machine comprising shuttle braking means Download PDF

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Publication number
US3889723A
US3889723A US482801A US48280174A US3889723A US 3889723 A US3889723 A US 3889723A US 482801 A US482801 A US 482801A US 48280174 A US48280174 A US 48280174A US 3889723 A US3889723 A US 3889723A
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US
United States
Prior art keywords
shuttle
solenoid
race
weaving machine
guide
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
US482801A
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English (en)
Inventor
Walther Filter
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.)
Voestalpine AG
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Voestalpine AG
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Filing date
Publication date
Application filed by Voestalpine AG filed Critical Voestalpine AG
Application granted granted Critical
Publication of US3889723A publication Critical patent/US3889723A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/52—Shuttle boxes

Definitions

  • a solenoid is provided, which is freely slidably movable upwardly in said guide from an initial position adjacent to said shuttle race upwardly into frictional engagement with said shuttle when the same is disposed over said guide, and which is energizable to have a predetermined range of action, which extends above said shuttle race.
  • Said weaving machine, except for said shuttle and solenoid, is free of ferromagnetic parts in said range of action of said solenoid.
  • This invention relates to a braking device for shuttles which consist at least in part of ferromagnetic material, which device comprises at least one solenoid disposed adjacent to the shuttle race.
  • the braking devices for shuttles comprise usually a lateral guide wall for the shuttle and a resiliently cushioned shuttle tongue which faces said guide wall, and the stationary lateral guide wall as well as the shuttle tongue are provided with brake linings and press the incoming shuttle between them to hold it in position.
  • the shuttle is not only braked as it enters the shuttle box but the braking device becomes effective also as the shuttle is shot into the shed so that the shuttle picker must be dimensioned to overcome the braking force.
  • a braking device has been disclosed which comprises a movable braking jaw, which can be pivotally moved away from the shuttle race so that the braking device remains ineffective as the shuttle is shot into the shed.
  • a separate, expensive control mechanism and a mechanical pivotal movement of the movable jaw are required for the operation of that known braking device so that these known braking devices can be used only with shuttles shot at relatively low speed.
  • Another braking device which enables an arrest of shuttles by means of a stationary solenoid which is disposed adjacent to the shuttle race. That device has the disadvantage that the shuttle must either slide on the shuttle race, which involves an undesirably high resistance to the movement of the shuttle, or the shuttle cannot be braked by frictional forces. If the shuttle is braked only by magnetic forces because the solenoid acts on the shuttle through an intervening air gap, much stronger magnetic forces will be required. Besides, the frictional forces will be significant owing to the weight of the shuttle as well as to the inevitable remanence whenever the shuttle moves over the braking device.
  • each solenoid is mounted in a vertical guide to be freely slidably movable upwardly into frictional engagement with the shuttle and that, except for the shuttle, only non-ferromagnetic parts are disposed in the range of action of each solenoid.
  • each solenoid is mounted in a vertical guide to be freely slidably movable upwardly into frictional engagement with the shuttle and that, except for the shuttle, only non-ferromagnetic parts are disposed in the range of action of each solenoid.
  • the solenoid When the ferromagnetic material of the shuttle enters the range of action of the solenoid, the forces of attraction become effective so that the solenoid is slidably moved in its vertical guide into engagement with the shuttle and adheres to the underside of the shuttle.
  • the shuttle is braked by the frictional force which is effective only between the vertically displaceable solenoid and the horizontally moving shuttle.
  • two or more solenoids are usually arranged one behind the other in the direction of travel of the shuttle. A single solenoid may be used if its force of attraction is sufficient.
  • the solenoid is deenergized. When the exciting current has been interrupted, the solenoid falls back by gravity to its initial position and then will not impede the further travel of the shuttle.
  • the parts disposed in the range of action of the solenoids must consist of non-ferromagnetic material.
  • the braking device according to the invention has proved particularly satisfactory with weaving machines in which during a trouble-free operation the shuttles are not arrested by braking devices but are only reversed by energy storing springs.
  • the shuttles which continually reciprocate through the shed must be quickly and reliably arrested whether they enter the shuttle box from the shed or are moving toward the shed. Such sudden arrest of the shuttle is hardly enabled by the known braking devices.
  • each solenoid may be provided within the scope of the invention with a brake lining on that surface which faces the shuttle.
  • a shuttle race 1 of plastics material or the like has a substantially rectangular aperture 2, which serves as a vertical guide for a solenoid, which consists of an exciter winding 3 and a laminated iron core 4.
  • the iron core 4 normally rests on a U-shaped beam 5 which carries the shuttle race 1.
  • the iron core 4 is freely slidably movable against a shuttle 6, which is indicated by dash-dot lines.
  • the exciter winding 3 is connected to a source of current so that the solenoid 3, 4 is energized. Unless the shuttle 6 is adjacent to the solenoid, the latter will remain in its initial position remote from the path of the shuttle 6 because there are no ferromagnetic parts in the range of action of the solenoid.
  • the hollow beam 5 which carries the shuttle race 1 consists of aluminum.
  • the shuttle is then braked by the frictional force between the solenoid, which is immovable in the direction of travel of the shuttle 6, and the moving shuttle.
  • To release the brake it is sufficient to disconnect the exciter winding 3 from the source of current so that the magnetic field is eliminated, the force action between the shuttle and the solenoid ceases, and the solenoid returns by gravity to its initial position.
  • the braking device according to the invention can arrest the shuttle exactly at the right time without need for a special control device because the movement of the solenoid 3, 4, which acts virtually as a brake jaw, is controlled by the shuttle itself. It is sufficient to energize the exciter winding 3 in time; this can be accomplished without difficulty because the energization does not result in an immediate movement of the solenoid.
  • the arrangement of the solenoid below the passing shuttle affords the additional advantage that separate stationary guide walls and the like are not required. Besides, the weight of the solenoid itself may be used to return it.
  • a weaving machine which comprises a shuttle race
  • a shuttle consisting at least in part of ferromagnetic material and movable along said shuttle race and over said guide.
  • a solenoid which is freely slidably movable upwardly in said guide from an initial position adjacent to said shuttle race into engagement with said shuttle when disposed over said guide, and which is energizable to have a predetermined range of action, which extends above said shuttle race,
  • said weaving machine except for said shuttle and solenoid, being free of ferromagnetic parts in said range of action of said solenoid.
  • said weaving machine being free of ferromagnetic parts in the range of action of each of said solenoids, except for said shuttle and the solenoid concerned.
  • said solenoid includes a ferrous core and a winding about said core, said race defining a path of movement for said shuttle, means for normally holding said core out of said path, said core, when excited by said winding and attracted by said shuttle, moving into said path and frictionally engaging said shuttle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Braking Arrangements (AREA)
US482801A 1973-07-06 1974-06-24 Weaving machine comprising shuttle braking means Expired - Lifetime US3889723A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT595673A AT322471B (de) 1973-07-06 1973-07-06 Bremsvorrichtung für webschützen

Publications (1)

Publication Number Publication Date
US3889723A true US3889723A (en) 1975-06-17

Family

ID=3581395

Family Applications (1)

Application Number Title Priority Date Filing Date
US482801A Expired - Lifetime US3889723A (en) 1973-07-06 1974-06-24 Weaving machine comprising shuttle braking means

Country Status (11)

Country Link
US (1) US3889723A (enrdf_load_stackoverflow)
JP (1) JPS5036765A (enrdf_load_stackoverflow)
AT (1) AT322471B (enrdf_load_stackoverflow)
BE (1) BE816286A (enrdf_load_stackoverflow)
CH (1) CH567594A5 (enrdf_load_stackoverflow)
DD (1) DD111417A5 (enrdf_load_stackoverflow)
DE (1) DE2425796A1 (enrdf_load_stackoverflow)
ES (1) ES204263Y (enrdf_load_stackoverflow)
FR (1) FR2236043A1 (enrdf_load_stackoverflow)
IL (1) IL45081A (enrdf_load_stackoverflow)
SE (1) SE7408736L (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3134054A1 (de) * 1981-08-28 1983-05-05 Hoechst Ag, 6230 Frankfurt Elektrochemisches entwicklungsverfahren fuer reproduktionsschichten
JPS6120043A (ja) * 1984-07-09 1986-01-28 Sigma Gijutsu Kogyo Kk 現像の終点検出方法
JPH06103393B2 (ja) * 1985-01-21 1994-12-14 シグマ技術工業株式会社 現像の終点検出方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2248872A (en) * 1940-04-10 1941-07-08 Hugh M Connor Lock for loom shuttles
US2501394A (en) * 1948-07-07 1950-03-21 Freniere Res Corp Shuttle box for looms

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2248872A (en) * 1940-04-10 1941-07-08 Hugh M Connor Lock for loom shuttles
US2501394A (en) * 1948-07-07 1950-03-21 Freniere Res Corp Shuttle box for looms

Also Published As

Publication number Publication date
DD111417A5 (enrdf_load_stackoverflow) 1975-02-12
BE816286A (fr) 1974-12-13
SE7408736L (enrdf_load_stackoverflow) 1975-01-07
JPS5036765A (enrdf_load_stackoverflow) 1975-04-07
IL45081A0 (en) 1974-09-10
AT322471B (de) 1975-05-26
ES204263Y (es) 1976-05-01
FR2236043A1 (enrdf_load_stackoverflow) 1975-01-31
ES204263U (es) 1976-01-16
CH567594A5 (enrdf_load_stackoverflow) 1975-10-15
IL45081A (en) 1976-08-31
DE2425796A1 (de) 1975-01-23

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