US2763035A - Stop mechanism - Google Patents

Stop mechanism Download PDF

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Publication number
US2763035A
US2763035A US341227A US34122753A US2763035A US 2763035 A US2763035 A US 2763035A US 341227 A US341227 A US 341227A US 34122753 A US34122753 A US 34122753A US 2763035 A US2763035 A US 2763035A
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United States
Prior art keywords
sliver
detector
machine
path
movement
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Expired - Lifetime
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US341227A
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English (en)
Inventor
Mackie John Pringle
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James Mackie and Sons Ltd
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James Mackie and Sons Ltd
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Publication date
Application filed by James Mackie and Sons Ltd filed Critical James Mackie and Sons Ltd
Priority to US341227A priority Critical patent/US2763035A/en
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Publication of US2763035A publication Critical patent/US2763035A/en
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Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D01H13/1616—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material characterised by the detector
    • D01H13/1625—Electro-mechanical actuators

Definitions

  • This invention relates to stop mechanisms for drawing frames and similar textile machines such, for example, as spinning frames, in which sliver or other fibrous material emerging from a drawing head then proceeds to a further stage of treatment.
  • stop mechanism The most important of the faults occurring in the operation of such a machine and which may be detected by means of a stop mechanism is the disruption of the sliver on its passage from the drawing rollers, and stop mechanisms employing a detector bearing on .the sliver over this part of its travel are well-known.
  • the usual form of such stop mechanism comprises a detector which bears directly on the sliver in a fixed position between the drawing rollers and, in a drawing frame for example, the delivery rollers. In the event of disruption of the sliver in this region, the detector member passes through and beyond the normal line of travel of the sliver, and this movement is utilised to operate a stop device.
  • Stop mechanisms of this general type are unsatisfactory for a number of reasons.
  • the sliver particularly in a drawing frame of the finisher type, is extremely fragile and the detector is dependent on the strength of the sliver to support its whole weight. This often causes a gradual sag in the sliver, and in consequence a build-up of vagrant fibres takes place on the detector or between the detector and the moving sliver. This can then result in disruption of the sliver due to excessive friction and to the excessive bearing area thereby produced between the detector and the surface of the sliver.
  • the substantially continuous movement of the detector avoids any such build-up of vagrant fibres as previously mentioned, while at the same time the detector is able to operate satisfactorily with only partial disruption of the material.
  • the departure of the detector member from its normal path of movement causes either the member itself or a part moving with it to engage a co-operating member and so operate the stopping device.
  • the path of movement of the detector runs generally parallel with the direction of movement of the fibrous material, and the detect-or is caused to recipro cate along this path, being deflected from it to engage the co-operating member when the fibrous material is disrupted.
  • the path of movement is generally parallel with the direction of movement of the fibrous material, it is preferred that the detector should touch the material during only a short portion of its travel. This has the effect of deflecting the material to the smallest extent and does not interfere with its normal passage from the machine.
  • the cooperating member preferably con sists of an abutment so that when the detector departs from its normal path of movement, its motion is stopped by the abutment, and this is utilised to operate a stopping device. This may be achieved by transmitting the motion to the detector from a driving member by way of aspring so that when the motion of thedetector is stopped,- the spring is deformed. The relative movement then occurring between the ends of the spring is used to operate the stopping device.
  • the reciprocation of the detector is produced by a shaft rocked by a connecting rod driven from an eccentric.
  • the drive from the connecting rod is transmitted through a spring to a link mounted on the shaft so that when the motion of the detector, and hence the shaft, is stopped, the connecting rod is displaced inrelation to the link.
  • the relative motion between the ends of the spring is then used to produce a carnming action to operate a switch, and thus stop the machine.
  • the rocker shat-t may extend across the whole width of the machine and carry a number of detectors, one for each drawing head and co-opera'ting respectively with the sliver from that drawing head.
  • a stop mechanismin accordance with the present invention may further be utilised to operate on occurrence of a fault of this nature.
  • a second loo-operating member is provided with which the detector or a part moving with it moves into contact when deflected by the-presence of the thickened sliver.
  • a deflector plate or similar member is preferably located on the opposite side of the sliver to the detector. Any choking that occurs then forces the sliver away from the plate, carrying the detector With it so as to deflect it from its path of motion in the opposite direction to that caused by the disruption 'of the sliver. This brings the detector into engagement with the second co-operating member to stop the rim-- chine;
  • Figure 1 is a side elevation of the delivery and of a drawing frame
  • Figure 2 is a plan view of the 'part shown in Figure 1;
  • Figures 3 and 4 are plan views of forms of detectors used in the mechanism shown in Figures 1 and 2;
  • Figures 5 and 6 are side elevations of the detector in operation.
  • Figure 7 is a side elevation of the detector and cooperating par'ts of the stop mechanism illustrating their operation to stop the machine upon the breaking of a sliver.
  • sliver 1 is shown emerging This may be caused.
  • sliver passes over a sliver plate 5 in the usual way and thence between delivery rollers 6 and 7 to the next stage of treatment. It is during its passage between the drawing rollers and the delivery rollers that faults in the sliver may most readily be detected.
  • a detector 10 bears on the sliver close to the point where it passes over the sliver plate 5.
  • the detector is pivotally mounted by means of a pin 11 to a bracket 12 turning with a rocker shaft 13, best seen in Figure 2.
  • the shaft 13 is rocked by means of a connecting rod 14 connected to an eccentric 15 driven by meshing gears 16 and 17.
  • the latter is mounted on the shaft of the delivery roller 6 and the gears are enclosed within a casing 18.
  • the rod 14 is free to slide through a bush 21 turning on the end of a link arm 22 rigidly mounted on the shaft 13, and is prevented from withdrawal from the bush 21 by means of a nut 23.
  • the operative thrust is transmitted from the rod 14 to the bush 21 by means of a coiled spring 24 situated between the bush 21 and a collar 25 secured to the rod 14.
  • the detector 10 If, however, the sliver should break or become thin, the detector 10 is allowed to drop, and during the course of its reciprocation a shoulder 28, formed in the detector, comes into engagement with the edge of the sliver plate 5 as shown in Figure 7. This immediately stops the movement of the detector, and since this is rigidly connected to the shaft 13, the rocking of this shaft is also stopped.
  • the stop mechanism is also designed to Work in the event of an abnormally thick sliver passing through, or if there is a choke to the left-hand side of the drawing rollers which eventually passes through to the delivery rollers.
  • a deflecting plate is situated below the path of the sliver to the left of the sliver plate 5 so that when an extra thick body of sliver passes from the drawing rollers, the detector 10 is lifted from its usual path of movement. This brings the extension 26 into engagement with a stop member 41 shown diagrammatically in Figure 6 and this again arrests the travel of the detector. This stops the motion of the shaft 13 and causes the spring 24 to be compressed so as to operate the switch 32.
  • a single detector is arranged to operate either in the event of missing sliver or in the event of abnormally thick sliver.
  • a detector of width corresponding to that of the sliver is used as shown in Figure 4.
  • the detector may consist of two or more separate fingers. A construction including. two such fingers is shown in Figure 3, and it will be clear that if either one or the other of these two fingers drops below its normal path of travel owing to the absence of part of the sliver, it will come into engagement with the edge of the sliver plate 5, and operate to stop the machine in the manner already described.
  • a textile machine having a pair of drafting rollers, a sliver plate and a pair of delivery rollers, said drafting rollers feeding sliver over said sliver plate to said delivery rollers, the combination of a detector, means for cyclically moving said detector so as to engage said sliver over part at least of its path of motion, said path of motion being such that if said sliver is missing said detector drops to engage the edge of said sliver plate stopping further motion thereof, and means responsive to stoppage of the motion of said detector for stopping the machine.
  • a textile machine in which said means responsive to stoppage of the motion of said detector comprises a yieldable connection between said detector moving means and said detector, and means responsive to yielding of said connection for stopping the machine.
  • a textile machine having a pair of drafting rollers, a sliver plate and a pair of delivery rollers, said drafting rollers feeding sliver over said sliver plate to said delivery rollers, the combination of a rocker shaft, a radial arm projecting from said rocker shaft, a detector pivoted to said arm, means for rocking said rocker shaft wherebysaid detector is caused to reciprocate in engagement with said sliver, the path of reciprocation being such that if said sliver is missing said detector drops to engage the edge of said sliver plate whereby said rocker shaft is stopped, and means responsive to stoppage of said rocker shaft for stopping the machine.
  • said rock, ing means comprises an eccentric, means for driving said eccentric, a rod connected to said eccentric, a second radial arm on said rocker shaft, and a spring trans: mitting the movement of said rod to said second arm, and in which said means for stopping the machine comprises cam means responsive to distortion of said spring consequent on stoppage of said rocker shaft.
  • a rocker shaft having a pair of drafting rollers, a sliver plate and a pair of delivery rollers, said drafting rollers feeding sliver over said sliver plate to said delivery rollers, the combination of a rocker shaft, a radial arm extending from said shaft, a detector pivoted to said arm, a second radial arm extending from said shaft, an eccentric, means for driving said eccentric, a rod connected to said eccentric, a spring transmitting the movement of said rod to said second arm to rock said rocker shaft, whereby said detector is caused to reciprocate in engagement with said sliver, means for lifting said detector from said sliver during part of its reciprocation, the path of reciprocation being such that if said sliver is missing said detector drops to engage the edge of said sliver plate, abutment means situated above the path of reciprocation of said detector, said detector moving into' engagement with said abutment means when the thickness of said sliver increases, cam means responsive to distortion of said spring consequent on stop
  • said detector comprises a plurality of parallel fingers spaced across the width of said sliver.
  • a textile machine including means defining a a path of travel of fibrous material, the combinationof a pivoted detector, a mounting for said detector, support means for said fibrous material, said fibrous material passing between said detector and said support means, means for producing cyclically repeated relative motion between said detector and said support means, and means responsive to interruption of said cyclic relative motion to stop said machine.
  • a textile machine including means defining a path of travel of fibrous material, the combination of a pivoted detector, a mounting for said detector, support means for said fibrous material, said fibrous material passing between said detector and said support means, means for producing a cycle of repeated relative motion between said detector and the said support means so as to bring said detector into engagement with said fibrous material as it passes over said support means, failure of said detector to encounter said fibrous material at that point resulting in an interruption of said cycle, and means responsive to said interruption for stopping the machine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US341227A 1951-02-07 1953-03-09 Stop mechanism Expired - Lifetime US2763035A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US341227A US2763035A (en) 1951-02-07 1953-03-09 Stop mechanism

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3049/51A GB706192A (en) 1951-02-07 1951-02-07 Improvements in stop mechanisms for drawing frames and similar textile machines
US341227A US2763035A (en) 1951-02-07 1953-03-09 Stop mechanism

Publications (1)

Publication Number Publication Date
US2763035A true US2763035A (en) 1956-09-18

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Application Number Title Priority Date Filing Date
US341227A Expired - Lifetime US2763035A (en) 1951-02-07 1953-03-09 Stop mechanism

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US (1) US2763035A (US06262066-20010717-C00638.png)
BE (1) BE519372A (US06262066-20010717-C00638.png)
FR (1) FR1079863A (US06262066-20010717-C00638.png)
GB (1) GB706192A (US06262066-20010717-C00638.png)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4538328A (en) * 1983-05-25 1985-09-03 Fritz Stahlecker Device for interrupting feed of a roving to a drawing frame
US5428878A (en) * 1991-01-10 1995-07-04 Zellweger Luwa Ag Thread or yarn monitor for textile machines
CN109946185A (zh) * 2019-04-04 2019-06-28 广东嘉仪仪器集团有限公司 一种滑槽连接的油漆涂层检测用耐刮伤测试仪

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107366059A (zh) * 2017-04-27 2017-11-21 周鑫 一种并条机凹凸罗拉检测装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1205506A (en) * 1913-08-18 1916-11-21 George M Harrigan Stop mechanism for roving-machines and the like.
US1494829A (en) * 1923-05-19 1924-05-20 Chelsea Fibre Mills Automatic stop motion for drawing frames
US1556018A (en) * 1921-03-10 1925-10-06 Robert E Naumburg Sliver-replacement mechanism for textile machinery
US1735102A (en) * 1927-11-09 1929-11-12 George M Arragg Electric stop motion for spinning machines
US1926957A (en) * 1931-10-20 1933-09-12 Frederic G Peck Automatic stopping device for spreaders and drawing frames
US2611230A (en) * 1950-02-03 1952-09-23 Erle F Saunders Spinning frame

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1205506A (en) * 1913-08-18 1916-11-21 George M Harrigan Stop mechanism for roving-machines and the like.
US1556018A (en) * 1921-03-10 1925-10-06 Robert E Naumburg Sliver-replacement mechanism for textile machinery
US1494829A (en) * 1923-05-19 1924-05-20 Chelsea Fibre Mills Automatic stop motion for drawing frames
US1735102A (en) * 1927-11-09 1929-11-12 George M Arragg Electric stop motion for spinning machines
US1926957A (en) * 1931-10-20 1933-09-12 Frederic G Peck Automatic stopping device for spreaders and drawing frames
US2611230A (en) * 1950-02-03 1952-09-23 Erle F Saunders Spinning frame

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4538328A (en) * 1983-05-25 1985-09-03 Fritz Stahlecker Device for interrupting feed of a roving to a drawing frame
US5428878A (en) * 1991-01-10 1995-07-04 Zellweger Luwa Ag Thread or yarn monitor for textile machines
CN109946185A (zh) * 2019-04-04 2019-06-28 广东嘉仪仪器集团有限公司 一种滑槽连接的油漆涂层检测用耐刮伤测试仪
CN109946185B (zh) * 2019-04-04 2024-05-14 广东嘉仪仪器集团有限公司 一种油漆涂层检测用耐刮伤测试仪

Also Published As

Publication number Publication date
GB706192A (en) 1954-03-24
BE519372A (US06262066-20010717-C00638.png) 1955-04-15
FR1079863A (fr) 1954-12-03

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