US3561065A

US3561065A - Spinning cradles

Info

Publication number: US3561065A
Application number: US790353A
Authority: US
Inventors: Warren E Macdonald
Original assignee: WARREN E MACDONALD
Current assignee: WARREN E MACDONALD
Priority date: 1969-01-10
Filing date: 1969-01-10
Publication date: 1971-02-09
Anticipated expiration: 1988-02-09

Abstract

A CRADLE FOR LONG DRAFT SPINNING APPARATUS TO DIRECT THE GUIDE BELTS BETWEEN WHICH THE YARN IS DRAWN IN PASSING THROUGH THE SPINNING FRAME. TE CRADLE IS MADE SUBSTANTIALLY IN ONE PIECE, WITH NO SEPARABLE TENSORS, BUT THE BELTS ARE GUIDED OVER LIP MEMBERS DISPOSED SO AS TO OFFSET THE PATH OF THE YARN FROM DIRECT ALIGNMENT OF THE BITE OF THE ROLLS, THEREBY TO CONTROL THE FIBERS OF THE DRAFTED YARN. THE LIP MEMBERS ARE FORMED IN ONE PIECE WITH THE SIDE MEMBERS OF THE CRADLE, WHILE A SLOT IS PROVIDED IN ONE OF THE SIDE MEMBERS FOR INSERTION AND REMOVAL OF THE BELTS.

Description

Feb. 9,1971 w'. gmwomm 3,561,065

- srmmm CRADLES Filed Jan. 10, 1969 wane-N E. M/rcoa/v/uo,

. ATTORNEY5 United States Patent Olfice 3,561,065 SPINNING CRADLES Warren E. Macdonald, P.O. Box 116, Seekonk, Mass. 02771 Filed Jan. 10, 1969, Ser. No. 790,353 Int. Cl. D01h /88 US. Cl. 19-255 7 Claims ABSTRACT OF THE DISCLOSURE A cradle for long draft spinning apparatus to direct the guide belts between which the yarn is drawn in passing through the spinning frame. The cradle is made substantially in one piece, with no separable tensors, but the belts are guided over lip members disposed so as to olfset the path of the yarn from direct alignment of the bite of the rolls, thereby to control the fibers of the drafted yarn. The lip members are formed in one piece with the side members of the cradle, while a slot is provided in one of the side members for insertion and removal of the belts.

SUMMARY OF THE DISCLOSURE This invention relates to improvements in spinning cradles of the character used in long draft spinning frames to support the endless belts or aprons between which the yarn is drawn in the frame.

Cradles, as used heretofore, have been made of multiple parts of suitable metals or plastics with separate or sectional assembled tensors over which the belts or aprons are directed from the rolls of the drafting frame. Where the cradle is fabricated of several parts, there is always the problem of assembly, and with the sectional or separate and detachable tensors employed heretofore with such cradles, these have presented problems in service, especially when the belts are replaced or the cradle is removed from the spinning frame, and by fiber catching in and therefore collecting at the assembled joints, thereby causing improper operation and undue wear on the belts. In addition when groups of collected fibers break loose from these joints they can be carried into the yarn and create faults therein.

One objective of this invention is to overcome these objections and to improve the construction of the cradle, to enable it to be manufactured at low cost and to eliminate problems of assembly.

Another objective of the invention is to provide a cradle of non-metallic or plastic material which may be manufactured or molded substantially as one piece and which nevertheless may be installed readily in the drafting frame in guiding relation with the belts or aprons to assure proper and desired operation of the latter.

Another objective is to eliminate the assembled joints and thereby eliminate the problem of fibers collecting and the ensuing circumstances.

Still another objective of the invention is to provide for an increase in the guided relation of the belts around the top roll and to direct the belts through a curve, thereby to control the fibers of the drafted yarn.

These objectives may be accomplished, according to one embodiment of the invention, by providing a cradle formed substantially entirely of non-metallic or plastic material, preferably made: in one integral piece, as by molding or other fabrication. The cradle is formed with a pair of opposite side members having means for fitting in bearing relation with the shafts supporting a pair of rolls and which side members are connected together through a pair of lip members disposed in position to bear upon the forward ends of the belts or aprons and to guide the latter.

3,561,065 Patented Feb. 9, 1971 One of the side members is provided with a slot therethrough for insertion and removal of the belts or aprons, while the other side member is closed. The bearing portions of the side members that seat upon the shafts of the rolls dispose the lip members offset from the bite of the rolls so as to bend the belts or aprons in a reverse curve, thus creating a corresponding curvature in the yarn and thereby controlling the fibers of the drafted yarn.

BRIEF DESCRIPTION OF THE DRAWINGS This embodiment of the invention is illustrated in the accompanying drawings, in which:

FIG. 1 is a cross section through the cradle, applied to a pair of drafting rolls;

FIG. 2 is an end elevation of the cradle detached;

FIG. 3 is a front elevation of the cradle in its relation to the drafting rolls; and

FIG. 4 is a side elevation of the cradle assembly at the side opposite from FIG. 2.

In a conventional spinning frame to which this cradle may be applied a series of pairs of roll shafts are mounted for passage of a yarn Y therethrough in the manner generally indicated in FIG. 1. These roll shafts are suitably supported on a roll stand (not shown) and are operated so as to effect drawing of the yarn Y during passage through the rolls.

A pair of intermediate rolls are shown at 1 and 2 in cooperating relation to each other, being respectively top and bottom rolls in the usual mounting of the spinning frame. Likewise, top and bottom front rolls are shown at 3 and 4. The yarn Y passes between the rolls 1 and 2 and thence to and between the rolls 3 and 4.

Suitable supporting shafts are provided for mounting the respective rolls and for driving the latter. Shafts 5 and 6 are shown in FIG. 1 upon which the rolls 1 and 2 are mounted. The bottom shaft 6 is usually mounted in fixed bearings, while the top shaft is relatively short and supports an axially aligned pair of rolls and is capable of bodily displacement during installation of the belts or aprons and the cradle, after which these parts are snapped into place.

The belts or aprons are shown at 7 and 8. These belts or aprons are endless and extend over the intermediate rolls 1 and 2 and are brought substantially together, as illustrated in FIG. 1, for guiding the yarn Y therebetween.

The cradle comprises a pair of side members 9 and 10, each of which is relatively thick and may be formed by molding or other means of fabrication. The side members 9 and 10 are connected together by two lip members or tensors 11 which extend transversely between the platelike side members 9 and 1-0, as shown in FIG. 3, and generally in a horizontal directionwhen the cradle is installed on the drafting frame, as shown in FIG. 1. These lip members 11 are formed in one integral piece with the side members 9 and 10 and are not separate parts which would require individual assembly.

One of the side members, as 9, is substantially imperforate, while the other side member 10 has a slot 12 extending therethrough throughout its length and aligned between the two lip members or tensors 11. Thus, the belts or aprons can be inserted or removed through the slot provided between the lip members 11, which lip members extend between the side members 9 and 10.

The rearward end of each of the side members 9 and 10 has a concave bearing face 13 shaped to conform substantially to the periphery of the shaft 6 beside the bottom roll 2. The rearward end of each of the side members 9 and 10 also has a concave bearing surface -14 shaped to conform substantially to the periphery of ;he top shaft 5 when the cradle is in place in the spinning rame.

One or both of the side members 9 and 10 is preferably provided with a section adjacent the bearing surface 13 on the corresponding side of the slot 12 in the side member 10 extending upwardly around the top roll, as herein described in position to provide a positive side guide for the belts or, aprons 7 and 8.

The location of the bearing surfaces 13 and 14 causes the lip members 11 to be displaced vertically, with the opening therebetween out of axial alignment with the bite of the rolls 1 and 2. Therefore, the belts follow the curvature of the top roll 1 to a point where they are directed upwardly between the lip members 11 and thereby to direct the yarn away from this pair of rolls and toward the front pair of rolls 3 and 4.

Thus, the belts or aprons are directed through a serpentine path after leaving the bite of the rolls, which serpentine path is provided so as to keep the belts in close proximity to each other for a short distance from the bite of the rolls, thereby to control the fibers of the yarn being drafted between the rolls.

The function of the cradle is to hold the belts away from the rolls under very light tension in a given position. Therefore, the reaction of the belts reciprocally holds the cradle bearing surfaces 13 and 14 against the rolls. The design of the cradle bearing portion causes the cradle to remain in place when installed in the drafting frame.

Normally, the bottom shaft 6 will be assembled With the belts or aprons extending over the rolls thereon and hanging loosely. For installation, the cradle can be placed so that the bottom shaft is in position 2a as illustrated diagrammatically in FIG. 4, relative to the cradle.

The top shaft, which may be of sufficient length to accommodate two cradles can be shifted to the position In illustrated diagrammatically in FIG. 4 relative to the cradle for installation. The belts are slipped through the slot 12 in the end member 10 and the top shaft can then be brought into place into cooperating relation with the bottom shaft. After installation of the cradles and the belts, the top shaft is then held in place against the bottom shaft by conventional means.

Variations in the steps of installation may be made to suit the installers preference and convenience.

The cradle may be constructed of any suitable or desired material. One of the plastic materials having the desired characteristics is known as Delrin. The entire cradle can be molded or otherwise fabricated of onepiece construction without using or requiring separate or sectional tensors as frequently used heretofore. Thus, the construction is materially simplified, assembly elimi nated, and installation improved and with advantageous properties in service, a better drafting effect may be obtained on the yarn.

While I have illustrated and described the invention in one embodiment, it is recognized that variations and changes may be made therein Without departing from the invention set forth in the claims.

I claim:

1. A cradle for long-draft spinning apparatus having a pair of intermediate spinning rolls with aprons extending over the rolls, said cradle comprising side plates each having concave seats in one end thereof adapted to be applied to the pair of intermediate spinning rolls to brace against the respective rolls, lip members extending between the side plates and formed throughout their lengths in one integral piece with both side plates, said lip members being in position for guiding relation with the aprons and spaced apart to receive yarn therebetween, one of said side plates having a slot therethrough extending throughout the length of said one side plate for insertion and removal of the aprons.

2. A cradle for long-draft spinning aprons according to claim 1, wherein each of the lip members is in one piece throughout its length and in one piece with both side plates and extending continuously therebetween.

3. A cradle for long-draft spinning aprons according to claim 1, wherein the lip members are adjacent one side of the cradle at one end of the side plates, and means at the opposite end of the side plates for mounting the cradle on the intermediate rolls.

4. A cradle for long-draft spinning aprons according to claim 1, including concave seats in the side plates at one end thereof for mounting the cradle with respect to the intermediate rolls.

5. In drafting apparatus having a pair of coacting intermediate rolls and mounting shafts therefor, a onepiece cradle including side plates having concave seats at one end thereof in bearing relation to the roll shafts, spaced apart guide means adjacent the opposite end of the side plates, said drafting apparatus including aprons extending over the rolls and the respective guide means for guiding a yarn therebetween, one of the side plates having a slot extending throughout the length thereof for insertion and removal of the aprons through the slot.

6. In drafting apparatus according to claim 5, including a projecting portion on one of the plates overlapping an end portion of one of the rolls for confining the aprons therebetween.

7. In drafting apparatus according to claim 5, wherein the guide means is located above the bite between the coacting rolls and the aprons are directed upwardly around one of the rolls from the bite in a reverse arcuate direction to the guide means.

References Cited UNITED STATES PATENTS 2,020,483 11/1935 Truslow 19255 2,943,361 7/1960 Cotchett 192'54X 2,943,362 7/1960 Butler 19-253X DORSEY NEWTON, Primary Examiner