GB853856A - Improvements in or relating to looms for weaving - Google Patents

Improvements in or relating to looms for weaving

Info

Publication number
GB853856A
GB853856A GB2436757A GB2436757A GB853856A GB 853856 A GB853856 A GB 853856A GB 2436757 A GB2436757 A GB 2436757A GB 2436757 A GB2436757 A GB 2436757A GB 853856 A GB853856 A GB 853856A
Authority
GB
United Kingdom
Prior art keywords
feelers
barrel
hooks
dobby
pattern
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
Application number
GB2436757A
Inventor
Iorwerth Hefin Thomas
Andrzej Wrzesien
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.)
British Cotton Industry Research Association
Original Assignee
British Cotton Industry Research Association
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by British Cotton Industry Research Association filed Critical British Cotton Industry Research Association
Priority to GB2436757A priority Critical patent/GB853856A/en
Publication of GB853856A publication Critical patent/GB853856A/en
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D03WEAVING
    • D03CSHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00Dobbies
    • D03C1/06Double-lift dobbies, i.e. dobbies in which separate draw-knives or equivalent operate on alternate picks
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03CSHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C2700/00Shedding mechanisms
    • D03C2700/01Shedding mechanisms using heald frames
    • D03C2700/0127Programme-controlled heald frame movement
    • D03C2700/0133Programme-controlled heald frame movement with mechanical transmission
    • D03C2700/0138Programme-controlled heald frame movement with mechanical transmission using hooks or lifters
    • D03C2700/0155Double-lift mechanisms
    • D03C2700/0166Double-lift mechanisms of positively-driven type

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

853,856. Dobby. BRITISH COTTON RESEARCH ASSOCIATION. July 28, 1958 [Aug. 1, 1957], No. 24367/57. Class 142(2). In a positive double-lift open shed dobby, Fig. 2, fixed bars 21, 22 receive the upper ends 19c of any hooks 19 whose lower ends 19b are not engaged with the lifting knives 17, 18; accidental displacement of the hooks on the bars is prevented by lowering locking bars 28, 29 to the positions 28a, 29a, the bar 29 being of comblike construction to pass between the jacks 12. The hooks are set by feelers 23, 24, of which the pair pertaining to the same baulk 11 are coupled together by a spring 25 which holds them against stops 26, 27 when they are not rocked by pegs 30 on a pattern barrel 16; the pegs on alternate lags 31 are staggered so that the feelers 23 are operated for one pick and the feelers 24 for the next. Pattern mechanism, Fig. 3. The pattern barrel 16 is driven by a pin 35 engaging an arcuate slot 36 in the striker wheel 34 of a Geneva motion 37, 38; when the dobby is reversed, the slot 36 provides the necessary re-timing between the operation of the feelers and the dwell of the lifting knives. A clutch 39 between the Geneva wheel 38 and the shaft 16a of the pattern barrel enables the barrel to be turned by hand, the Geneva wheel then riding out of the notches of the clutch against the action of a spring 40. For pick-finding, the pattern barrel is turned an even number of notches of the clutch. To bring all the warp threads to the same level, the barrel is turned only one notch; the feelers 23, 24, Fig. 2, are then operated when the corresponding hooks 19 are out of their range whereby, on turning the loom two revolutions of the crankshaft all the hooks become engaged by the knives 17, 18 and all the heald shafts are consequently lowered. Adjusting shed size, Fig. 1. The dobby is mounted at the side of the loom and coupled to the shafts 15 by links 13, 13x and bellcrank levers 14, 14x. The lower ends of the jacks 12 have three holes 12b to receive the links 13; the holes lie on an arc of a circle having its centre at the position occupied by the right-hand end of the links 13 when the shafts are in their lowermost position; when the shed opening is altered by moving a link 13 from one hole to another, the bottom shed line therefore remains unaltered at shuttle race level. Specification 733,777 is referred to.
GB2436757A 1957-08-01 1957-08-01 Improvements in or relating to looms for weaving Expired GB853856A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2436757A GB853856A (en) 1957-08-01 1957-08-01 Improvements in or relating to looms for weaving

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2436757A GB853856A (en) 1957-08-01 1957-08-01 Improvements in or relating to looms for weaving

Publications (1)

Publication Number Publication Date
GB853856A true GB853856A (en) 1960-11-09

Family

ID=10210604

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2436757A Expired GB853856A (en) 1957-08-01 1957-08-01 Improvements in or relating to looms for weaving

Country Status (1)

Country Link
GB (1) GB853856A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517703A (en) * 1967-06-27 1970-06-30 Staubli Geb & Co Heald control and drive mechanism for double lift dobbies
US3833027A (en) * 1972-01-04 1974-09-03 Elitex Zavody Textilniho Double lift dobby
US4685492A (en) * 1984-06-11 1987-08-11 Murata Kikai Kabushiki Kaisha Reading device in dobby machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517703A (en) * 1967-06-27 1970-06-30 Staubli Geb & Co Heald control and drive mechanism for double lift dobbies
US3833027A (en) * 1972-01-04 1974-09-03 Elitex Zavody Textilniho Double lift dobby
US4685492A (en) * 1984-06-11 1987-08-11 Murata Kikai Kabushiki Kaisha Reading device in dobby machine

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