US2978753A - Textile drafting apparatus - Google Patents

Textile drafting apparatus Download PDF

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Publication number
US2978753A
US2978753A US727081A US72708158A US2978753A US 2978753 A US2978753 A US 2978753A US 727081 A US727081 A US 727081A US 72708158 A US72708158 A US 72708158A US 2978753 A US2978753 A US 2978753A
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US
United States
Prior art keywords
rods
rod
sliver
carrier
transmitter
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Expired - Lifetime
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US727081A
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English (en)
Inventor
Mackie John Kay 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
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/32—Regulating or varying draft
    • D01H5/38—Regulating or varying draft in response to irregularities in material ; Measuring irregularities
    • D01H5/40—Regulating or varying draft in response to irregularities in material ; Measuring irregularities employing mechanical time-delay devices

Definitions

  • This invention relates to machines for drafting textile slivers inwhich mechanism is provided for the automatic variation of the draft on the machine corresponding to the weight or thickness of the sliver being fed.
  • the incoming sliver will vary considerably in weight or thickness from. point to point along its length and by increasing the'draft at the points of greater thickness and reducing it at the points of lesser thickness the resultant product can be given very much greater uniformity. If the thickness of the incoming sliver is measured this may be done by means of a pair of rollers between which the sliver passes, the rollers being mounted for relative displacement towards and away from one another, and the degree of the displacement being a measure of the thickness of the sliver. It is then necessary to I adjustt the draft of the machine in accordance with variations of thickness as measured by these rollers.
  • The-basic principle of time delay mechanism which may be used for this purpose is set out in British specification No. 27,304 of 1911.
  • the relative displacement of the measuring rollers controls a setting member which engagesa series of axially movable rods mounted around the periphery of a rotating drum, the axial position of each rod being adjusted by the setting member as the rod passes the latter.
  • each rod is formed with annular grooves which engage with a grooved surface on a locking member situated at the point where the rods engage the transmitter. This prevents endwise movement of the rods by the transmitter but entails the adjustment of each rod in increments equal to the pitch of the grooves. In order some and diflicult to accommodate in the machine.
  • a second member or transmitter which is acted upon by each passing rod and is displaced by an amount dependent on the axial position of each rod.
  • the transmitter in its turn actuates draft control mechanism, being connected to a variable speed driving mechanism whereby either the speed of the feed or of the delivery of the "machine may be varied.
  • the time taken for each rod to pass from the setting member to the transmitter represents the time delay introduced which is arranged to be equal to the length of time taken for the sliver to move from the measuring rollers-to the drafting zone. In practice the'time delay imposed by the movement of the rods is slightly increased by the time of response of the draft control mechanism.
  • the outcome is that the draft of the machine is controlled in accordance with the axial position of successive rods which in turn is dependent on the varying weight or thickness of the sliver.
  • a time delay mechanism for the purpose referred to above includes a series of slidable members movable around a closed path between the setting member and the transmitter, each slidable member having its position controlled by the setting member and havinga surface sloping at asmall angle to the path of sliding motion; this surface acts directly or indirectly on the transmitter so that the setting member controls in turn the position of each slidable member and hence the position of the transmitter.
  • rod is not intended to be limited to a member of circular cross section but includes any member capable of sliding under the action of the corresponding slidable member and of subsequently acting on the transmitter.
  • each rod is pressed into contact with its corresponding slidable member by means of its bias and also that the'surface of the slidable member slopes at a small angle to its direction of motion, each slidable member and rod are locked together so that once they have been set there is very little or no danger of displacement either during travel between the setting member and the transmitter or while the rod is acting on the transmitter.
  • the slidable members are arranged to slide substantially axially ina supporting drum (thus occupying approximately the position of the rods in the previous form of construction referred to) while the rods slide radially in t-hedrum.
  • the arrangement may be reversed, the slidable members sliding radially and the rods sliding axially-of the drum; In either case the rods are locked against movep angle of slopeis of the order of seven degrees.
  • a cam is preferably provided for forcing each rod back against its resilient bias so'as to relieve the pressure on the slidable member while this is being acted on by the setting member.
  • Figure 1 shows the general arrangement including additional mechanism associated with the setting member and the transmitter;
  • FIG. 2 is a detailed view of measuring rollers shown in Figure 1; i H
  • Figure 3 is a cross sectional'view o'fa rotary drum appearing in Figure l; and I i V Figure 4 is a detailed view seen in the direction of the arrow IV in Figure 1. 7
  • the apparatus 'shownin Figure 1 comprises essentially time delay mechanism including emery drum ii, a a
  • the measuring rollers 4 which are also seen in Figure 2 comprise a lower roller 16 turning in a fixed mounting and an upper roller ll carried by a short armylZ of p a bell-crank lever pivoted at-13 and having a considerably longer downwardly extending arm 14.
  • the sl ver 16 is considerably condensed foritspassage between the measuring rollers; so that any minor. variaticns in its thickness have an enhanced effect in producing displ-acements of the r ovable upper rolleralll. Cons: uently any variations-in the thickness of thesliver 1'6 tend to rock the bellcrank lever about its pivot .13,
  • each wedge is formed with a surface 33 sloping are small angle to the direction of sliding movement.
  • the Co-operating with each wedge is a rod sliding in a radially extending slot in the drum 31.
  • Each rod is formed with a cut-away portion 35 in the region of its middle, the upper edge of which defines a shoulder 36 15 bearing against the sloping surface 33 of the'wedge 30.
  • This shoulder is biased into engagement with the wedge by means of a compression spring 37 acting between a surface 38 on the drum 31 and a washer 39 on the end of the .rod.
  • a compression spring 37 acting between a surface 38 on the drum 31 and a washer 39 on the end of the .rod.
  • the lever 55 controls the setting of a variable-ratio cone drive comprising a pair of oppositely disposed cones 60 and 61.
  • the upper end of the lever 55 is fitted with a fork comprising prongs 62 located on opposite sides of a belt 63 passing around the cones 60 and 61.
  • These cones form one stage in a gearbox 65, the details of which are not shown but which has its input applied by way of a gearwheel 66 and its output taken from a further gearwheel 67. Accordingly as the belt 63 is adjusted along the cones 60 and 61 so the ratio of the gearbox 65 is adjusted to provide corresponding control of the draft of the drawing head.
  • the drawing head is not illustrated but in practice it is convenient to drive the drafting rollers at a substantially constant speed and to drive the feed rollers from the drafting rollers through the gearbox 65. Consequently any variations in thickness of the sliver 16 are reflected as compensating variations in the speed of the feed rollers which tend to improve the levelness and quality of the sliver.
  • each of said rods movable in a direction radially from said carrier in response to the sliding movement of said sloping surface of said slidable member, means for locking said rod in engagement with said sloping surface after said member has been slidably positioned on said carrier by said setting means, transmitting means for controlling the draft of said drawing head of said machine, said transmitting means disposed adjacent said carrier and successively engaged by the radially extending end of each of said rods traveling about said path of rotation, and means for subsequently disengaging said locking means to again permit movement of said slidable member relative to said rod and said carrier.
  • each of said rods has a centrally cut-away portion defining a shoulder, said shoulder engaging the sloping surface of its corresponding slidable member.
  • said means for disengaging said locking means includes a cam surface mounted on said carrier and positioned to engage the inner end of each of said rods after each of said rods has moved past said transmitting means in the said path of rotation, said rods moving radially outwardly relative to said carrier and said sloping surfaces where said inner ends thereof engage said cam surface.
  • Apparatus as defined in claim 4 including a fixed resetting member adjacent said carrier at a point in its path of rotation between said disengaging means and said setting means, said resetting member positioned to engage the ends of said sliding members and center said members relative to said carrier in a datum position.
  • Time-delay mechanism for automatically controlling the draft of a drawing head on a textile sliver drafting machine in accordance with variations in the size of the sliver entering said drawing head, said mechanism comprising a rotatabl carrier, a plurality of axially slidable members mounted on said carrier and projecting laterally from each side thereof, each of said slidable members having a surface sloping at an angle to its direction of sliding, a plurality of rods mounted on said carrier and projecting radially therefrom, means for raising each of said rods into engagement with the sloping surface of a corresponding slidable member, said rods movable radially of said carrier in accordance with the axial positioning of the corresponding sloping surface of the slidable members, means for measuring the size of the sliver to be fed into the drawing head of the machine, setting means spaced from said carrier and connected to said sliver measuring means, the spacing of said setting means from said carrier being directly responsive to the variations in the size of the

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US727081A 1957-04-15 1958-04-08 Textile drafting apparatus Expired - Lifetime US2978753A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12252/57A GB880871A (en) 1957-04-15 1957-04-15 Improvements in textile drafting apparatus

Publications (1)

Publication Number Publication Date
US2978753A true US2978753A (en) 1961-04-11

Family

ID=10001152

Family Applications (1)

Application Number Title Priority Date Filing Date
US727081A Expired - Lifetime US2978753A (en) 1957-04-15 1958-04-08 Textile drafting apparatus

Country Status (5)

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US (1) US2978753A (pt)
BE (1) BE566720A (pt)
DE (1) DE1186374B (pt)
FR (1) FR1205928A (pt)
GB (1) GB880871A (pt)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3158121A (en) * 1960-03-03 1964-11-24 Motomation Inc Mechanical memory device
US3206803A (en) * 1962-01-29 1965-09-21 Prince Smith & Stells Ltd Apparatus for detecting and correcting irregularities of thickness of a textile slive
US4288020A (en) * 1979-07-02 1981-09-08 The Babcock & Wilcox Company Tracking type welding apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113350A (en) * 1960-05-18 1963-12-10 Warner Swasey Co Memory wheel control system for gill box

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633913A (en) * 1950-01-03 1953-04-07 James E Morrow Control device
US2681475A (en) * 1948-05-07 1954-06-22 Raper George Frederick Device for controlling uniformity of materials
GB710957A (en) * 1951-08-14 1954-06-23 Tmm Research Ltd Improvements in apparatus for detecting and correcting irregularities of thickness of a textile sliver
US2746093A (en) * 1951-08-14 1956-05-22 Tmm Research Ltd Apparatus for detecting and correcting irregularities of thickness of a textile sliver
US2810936A (en) * 1955-09-08 1957-10-29 Altenburger Wilhelm Carding machine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191127304A (en) * 1911-12-06 1912-12-05 Joshua Valentine Eves Improvements in Machines for Drawing Flax, Wool and other Fibres for Forming Slivers or Yarn.
GB656135A (en) * 1947-05-15 1951-08-15 George Frederick Raper Improvements in or relating to apparatus for detecting and correcting departures from standard in the thickness or diameter of longitudinally travelling textile slivers
DE940494C (de) * 1953-09-19 1956-03-22 Askania Werke Ag Einrichtung zur laufenden mechanischen Darstellung der Verzoegerungs-funktion zu einer Funktion der Zeit fuer eine vorgegebene Zeitverzoegerung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2681475A (en) * 1948-05-07 1954-06-22 Raper George Frederick Device for controlling uniformity of materials
US2633913A (en) * 1950-01-03 1953-04-07 James E Morrow Control device
GB710957A (en) * 1951-08-14 1954-06-23 Tmm Research Ltd Improvements in apparatus for detecting and correcting irregularities of thickness of a textile sliver
US2746093A (en) * 1951-08-14 1956-05-22 Tmm Research Ltd Apparatus for detecting and correcting irregularities of thickness of a textile sliver
US2810936A (en) * 1955-09-08 1957-10-29 Altenburger Wilhelm Carding machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3158121A (en) * 1960-03-03 1964-11-24 Motomation Inc Mechanical memory device
US3206803A (en) * 1962-01-29 1965-09-21 Prince Smith & Stells Ltd Apparatus for detecting and correcting irregularities of thickness of a textile slive
US4288020A (en) * 1979-07-02 1981-09-08 The Babcock & Wilcox Company Tracking type welding apparatus

Also Published As

Publication number Publication date
DE1186374B (de) 1965-01-28
FR1205928A (fr) 1960-02-05
GB880871A (en) 1961-10-25
BE566720A (pt)

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