US2763034A - Stop mechanism - Google Patents

Stop mechanism Download PDF

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Publication number
US2763034A
US2763034A US351875A US35187553A US2763034A US 2763034 A US2763034 A US 2763034A US 351875 A US351875 A US 351875A US 35187553 A US35187553 A US 35187553A US 2763034 A US2763034 A US 2763034A
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US
United States
Prior art keywords
detector
sliver
abutment
pivot
engagement
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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
US351875A
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English (en)
Inventor
Mackie John Pringle
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.)
James Mackie and Sons Ltd
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James Mackie and Sons Ltd
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Filing date
Publication date
Application filed by James Mackie and Sons Ltd filed Critical James Mackie and Sons Ltd
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Publication of US2763034A publication Critical patent/US2763034A/en
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Classifications

    • 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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/18—Automatic stop motions
    • D03D51/34—Weft stop motions

Definitions

  • a pivoted detector is employed and repeated engagement is brought about between the detector and the sliver or other fibrous material, the motion causing this engagement having a component transverse to the general direction of travel of the sliver so that provided the sliver is moving at a speed greater than a critical value in relation to the transverse component of the relative motion, the detector is rocked about its pivot so as to prevent either the detector or a part acting with it from coming into either direct or indirect engagement with an abutment.
  • the sliver Under normal operating conditions, the sliver will be moving at a speed greater than this critical value, but under other conditions when it is moving at a speed less than this value, it will fail to rock the detector about its pivot with the result that either the detector or the part acting with it will come into en agement with the abutment and will thus operate a stopping device.
  • the third and least common set of circumstances in which the stop mechanism will be brought into action is when the sliver is moving, but at a speed less than the critical value. This may occur under conditions known as a running choke when the sliver moves forward at a speed equal to the feed speed instead of the delivery speed of the drawing head.
  • the stopping device it is desirable to operate the stopping device as soon as the speed of the sliver falls below a certain critical value which can be determined in any particular set of circumstances.
  • the speed of relative motion causing the engagement between the detector and the sliver is so selected that the stopping device is brought into action as soon as the speed of the sliver falls below this critical value.
  • the motion necessary to bring'about the engagement is imparted to the detector member, which for this purpose may be caused to move in a closed path in such a way so as to engage the sliver repeatedly with a component of motion transverse to that of the sliver.
  • the detector member which for this purpose may be caused to move in a closed path in such a way so as to engage the sliver repeatedly with a component of motion transverse to that of the sliver.
  • the detector or a part moving with it engages an abutment and so operates the stopping device.
  • the abutment is fixed so that when the detector or the part moving with it engages the abutment, its motion is interrupted and this then operates the stopping device.
  • the motion of the detector may be transmitted from a driving member by way of a spring so that when the motion of the detector is stopped by means of engagement with the abutment, the spring is deformed and the relative movement between its ends is used to operate the stopping device.
  • this may be occasioned by means of a transverse motion of the sliver imparted to it by means of a plate or other support over which it passes.
  • the support causing the transverse motion may itself constitute the abutment.
  • Figures 1 and 2 are an elevation and a plan view respectively of the drawing head of a textile machine fitted with a stop mechanism in accordance with the invention
  • FIGS 3 and 4 are detailed views showing steps in the operation of the stop mechanism.
  • FIGS 5 to 7 show successive steps in the operationof an alternative form of stop mechanism
  • Figure 8 shows a modification of the stop mechanism shown in Figures 1 to 4.
  • sliver 1 emerging from the gill bed, part of which is shown at 2 passes between a drawing roller 3 and a correspondingpressing roller 4 to a pair of delivery rollers 5 and 6 respectively.
  • the sliver In its passage between the drawing rollers and the delivery rollers, the sliver normally passes at uniform speed over the surface of a sliver plate 7 where it is engaged repeatedly by means of a detector member 8.
  • This detector is formed of sheet metal bent to a shape so as to provide a small counterweight 9 which causes the detector to hang at a small angle to the vertical so that a line joining its pivot 10 to its point of engagement with the sliver is approximately perpendicular to the general line of movement of the sliver.
  • the detector is pivoted to an arm 11 fixed to a rocker shaft 12 which extends across the width of the machine, part only of which is seen in Figure 2.
  • the shaft 12' is rocked by means of an eccentric 15 driven by means of a gear 16 on the shaft of the delivery roller 5 meshing with a second gearwheel 17.
  • gearwheel 16 is both enclosed by means of a cover 18, part of which is broken away to show the gearwheel 16.
  • the eccentric is connected by means of a rod 22 passing through a bush 23, which is free to rock in a link 24 secured to the shaft 12.
  • the rod 22 is located within the bush 23 by means of a collar 25, which bears against one side of the bush and a compression spring 26 which is located between one side of the bush 23 and a second enlarged collar 27 mounted on the end of the rod 22.
  • the detector Under fault conditions, however, which may be when the sliver is missing altogether, when it is stationary or when it is moving at a greatly reduced speed as already described in detail, the detector is not rocked about its pivot and consequently comes into engagement with the sliver plate 7, which functions as an abutment. If as shown in Figure 4 the sliver is missing altogether, the engagement between the detector and the sliver plate is direct whereas if the sliver is still present, the engagement is indirect, being through the sliver itself.
  • the latter is formed with a small depression 30, and as soon as the tip of the detector moves into this depression, its motion is positively stopped and as a consequence the motion of the shaft 12 is correspondingly interrupted. Since, however, the connecting rod 22 continues to move to the right as seen in Figure l, the spring 26 is compressed and the collar 27 moves to the right in relation to the bush 23 to exert a camming action on the left-hand face of an arm 31 pivoted at 32 to the bush 23.
  • the components of the drawing frame are the same and are indicated by the same reference numerals, but the relative movement producing engagement of the detector with the sliver is brought about by means of transverse movement of the sliver.
  • the sliver i is led over a sliver plate 37 pivoted at 38 and caused to rock about the pivot by means of a link 39 driven from an eccentric 40.
  • a detector 45 of the same shape as the detector 8 of Figure 1, piv- Ioted at 46.
  • the pivot 46 is mounted on an arm 47 which can rock about an axis 48, but which is held in the position shown in Figure 5 by means of a stop.
  • FIG 8 is a further modification of that shown in Figure 1.
  • the detector shown as 55 is pivoted at 56 to a bracket 57 which is rocked by means of a rocker shaft 58 (corresponding to the rocker shaft 12 in Figure 1) so as to cause the detector to reciprocate and repeatedly engage the sliver as in the construction of Figure 1.
  • the sliver is shown as passing over a conductor 60 which extends between the drawing rollers 3 and 4 and the delivery rollers 5 and 6.
  • the tip of the detector moves backwards and forwards along its L-shaped path, but as soon as the sliver is missing or its speed falls below the critical value, the tip of the detector comes into engagement with the conductor 60, thus stopping the rocking of the shaft 58 and operating a switch 34 by means of an arm 31 as in Figure 1.
  • the stop mechanism is designed to operate when a choke forms as shown in the figure.
  • the bracket 57 is formed with a nose 61 which reciprocates above the normal path of motion of the sliver.
  • a choke forms as shown at 62 the sliver builds up between the pressing roller 4, the conductor 60 and the nose 61.
  • the reciprocating motion of the nose is interrupted, thus stopping the rocking of the shaft 58 and once again bringing the stop mechanism into action.
  • this form of stop mechanism operates equally well on all fault conditions.
  • a textile machine including means defining a path along which fibrous material travels at uniform speed
  • a textile machine in which said abutment is fixed and also including a yieldable connection between said moving means and said detector, and means responsive to yielding of said connection for operating said stopping device.
  • a rocker shaft having a pair of drawing rollers adapted to deliver sliver across a space at uniform speed
  • a detector pivoted to said arm, means for rocking said rocker shaft whereby said detector is caused to reciprocate so as repeatedly to engage said sliver in said space with a component of motion transverse to that of said sliver, an abutment in said space, said abutment being so situated in relation to said detector that when the sliver is moving at a speed greater than a critical value in relation to the transverse component of said relative motion, said detector is rocked by said sliver about said pivot means so as to avoid engaging said abutment, while under other conditions a part of said detector engages said abutment so as to stop movement of said rocker shaft, a stopping device, and means responsive to stoppage of said rocker shaft for operating said stopping device.
  • rocking means comprises an eccentric, means for driving said eccentric, a rod connected to said eccentric, a second radial arm on said rocker shaft, a spring transmitting the movement of said rod to said second arm, and cam means responsive to distortion of said spring conse quent on stoppage of said rocker shaft, said cam means being operative to stop said machine.
  • a textile machine according to claim 5 wherein said stopping device includes an electric switch operated by said cam means.
  • a textile machine and also including a third arm fixed to said rocker shaft, said third arm being thus normally caused to reciprocate above the path of said sliver but being so situated as to have its motion stopped in the event of a choke.
  • a detector adjacent to said path, pivot means for said detector, support means for said sliver, means for imparting transverse reciprocating movement to said support means and hence to said sliver, whereby said sliver repeatedly engages said detector so that when the sliver is moving at a speed greater than the critical value in relation to the transverse reciprocating motion, said detector is rocked about said pivot means, while under other conditions said detector engages said support means, and means responsive to engagement between said detector and said support means for stopping said machine.
  • a textile machine in which said pivot means of said detector is normally stationary and includes yieldable means whereby said pivot means is displaced when said support means engages said detector, and said stopping means includes a device responsive to said displacement of said pivot means.
  • a textile machine including means defining a path of travel for fibrous material across a space at a desired rate of speed, the combination of a detector, pivot means for said detector, means for cyclically moving said detector whereby said detector repeatedly engages said fibrous material in said space with a component of motion transverse to that of said fibrous material, an abutment in said space, said abutment being so situated in relation to said detector that when the fibrous material is moving at a speed greater than a critical value in relation to the transverse component of said relative motion, said detector is rocked about said pivot means so as to avoid engaging said abutment, while under other conditions a part of said detector engages said abutment, a stopping device, and means operated by engagement between said detector and said abutment for operating said stopping device.
  • a textile machine including means defining a path of travel for fibrous material along a customary path, the combination of a detector adjacent to said path, pivot means for said detector, support means for said fibrous material, means for imparting transverse reciprocating movement to said support means and hence to said fibrous material, whereby said fibrous material repeatedly engages said detector so that when the fibrous material is moving at a speed greater than the critical value in relation to the transverse reciprocating motion, said detector is rocked about said pivot means, while under other conditions said detector engages said support means, and means responsive to engagement between said detector and said support means for stopping said machine.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Looms (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US351875A 1952-05-02 1953-04-29 Stop mechanism Expired - Lifetime US2763034A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB11193/52A GB732549A (en) 1952-05-02 1952-05-02 Improvements in stop mechanisms for drawing frames and similar textile machines
GB27758/55A GB842972A (en) 1952-05-02 1955-09-29 Improvements in stop mechanisms

Publications (1)

Publication Number Publication Date
US2763034A true US2763034A (en) 1956-09-18

Family

ID=32299739

Family Applications (1)

Application Number Title Priority Date Filing Date
US351875A Expired - Lifetime US2763034A (en) 1952-05-02 1953-04-29 Stop mechanism

Country Status (6)

Country Link
US (1) US2763034A (es)
BE (1) BE519609A (es)
DE (2) DE949148C (es)
ES (1) ES209107A1 (es)
FR (2) FR1079273A (es)
GB (2) GB732549A (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB732549A (en) * 1952-05-02 1955-06-29 Mackie & Sons Ltd J Improvements in stop mechanisms for drawing frames and similar textile machines
DE1272785B (de) * 1961-11-29 1968-07-11 Ernst Breuning Dr Ing Vorrichtung zum UEberwachen von Faeden oder Faserbaendern an Textilmaschinen, insbesondere Spinnmaschinen
DE1535167B1 (de) * 1962-10-06 1971-01-28 Plutte Koecke & Co Elektrischer Fadenwaechter an Spannertraegern von Schaer- oder Zettelgattern

Citations (3)

* 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.
US1252097A (en) * 1914-09-05 1918-01-01 Peter J Dockray Stop-motion for combers and the like.
US1494829A (en) * 1923-05-19 1924-05-20 Chelsea Fibre Mills Automatic stop motion for drawing frames

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH283390A (de) * 1950-03-08 1952-06-15 Benninger Ag Maschf Elektrische Fadenwächter-Einrichtung an einem Zettelgatter.
GB732549A (en) * 1952-05-02 1955-06-29 Mackie & Sons Ltd J Improvements in stop mechanisms for drawing frames and similar textile machines

Patent Citations (3)

* 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.
US1252097A (en) * 1914-09-05 1918-01-01 Peter J Dockray Stop-motion for combers and the like.
US1494829A (en) * 1923-05-19 1924-05-20 Chelsea Fibre Mills Automatic stop motion for drawing frames

Also Published As

Publication number Publication date
FR1079273A (fr) 1954-11-29
FR70825E (fr) 1959-09-01
GB732549A (en) 1955-06-29
DE1093276B (de) 1960-11-17
DE949148C (de) 1956-09-13
ES209107A1 (es) 1953-11-01
BE519609A (fr) 1955-04-29
GB842972A (en) 1960-08-04

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