US3488937A

US3488937A - Rotor retaining member

Info

Publication number: US3488937A
Application number: US717584A
Authority: US
Inventors: Henry A Duquette
Original assignee: TEXTILE DEV AND SALES Inc
Current assignee: TEXTILE DEV AND SALES Inc
Priority date: 1968-04-01
Filing date: 1968-04-01
Publication date: 1970-01-13
Anticipated expiration: 1987-01-13

Description

Jan. 13, 1970 H. A. DUQUETTE ROTOR RETAINING MEMBER Filed April 1, 1968 FIG.3

FIG.4

FIG.2

INVENTOR. HENRY A. DUQUETTE United States Patent Office 3,438,937 Patented Jan. 13, 1970 3,488,937 ROTOR RETAINING MEMBER Henry A. Duqnette, Greensboro, N.C., assignor to Textile Development & Sales, Inc., Greensboro, N.C., a corporation of North Carolina Filed Apr. 1, 1968, Ser. No. 717,584 Int. Cl. D01h 7/92, 7/46 US. Cl. 5777.45 7 Claims ABSTRACT OF THE DISCLOSURE BACKGROUND, BRIEF SUMMARY, AND OBJECTIVES OF THE INVENTION The bulk of stretchable yarns are produced on false twist spindle machines operating at speeds in excess of 75,000 r.p.m. A substantial number of high speed false twist spindles employ at each spindle position a false twist spindle driving means which may include revolving disks and magnetic permeable pole members in juxtaposition to the spindle driving means to retain the yarn rotor twist tube member in driving engagement. In those applications where two pairs of rotating disks are utilized to drive and engage the yarn rotor twist tube member, the magnetic yarn rotor supporting member is positioned adjacent to the throat formed between the disks to urge the yarn rotor twist tube member into driving engagement with the disks. High speed false twist twist spindle apparatus of the type under consideration is illustrated in US. Patent Nos. 3,058,289; 3,142,953; among others. Other high speed spindle apparatus in which the yarn is false twisted continuously to impart stretchable characteristics is shown in US, Patents 3,180,074; 3,232,037; 3,296,789; 3,308,614 and 3,355,871.

Presently the high speeds of rotation and the high speed of yarn travel result in frequent displacement of the small yarn rotor twist tube members for numerous reasons. The cost of replacement of the small twist tube rotors is costly as well as resulting in loss of production on the spindle position.

Efforts have been made to guard against the loss of the small yarn rotor twist tube members unsuccessfully. It must be considered that each false twist machine has in excess of 100 spindle positions and many sizes of spindles are employed in a single throwing plant.

Therefore, it is an objective of this invention to provide a relatively inexpensive yarn rotor retaining member which will prevent displacement of the yarn rotor twist tube member during normal causes for displacement.

Another objective of this invention is to provide a rotor retaining member that will interfere with the discharge of a yarn rotor twist tube member from driving engagement with a rotating rotor member driving means on a false twist machine.

Still another objective of this invention is to utilize a magnetically attractable retaining member or gate that will encircle or bridge the gap between projecting magthe removal and replacement of a yarn rotor twist tube member on a false twist machine without necessitating extensive downtime and a minimum of maintenance.

Another objective of this invention is to utilize a magnetically attractable member that will span the gap between spaced apart magnetic pole pieces positioned to retain a yarn rotor twist tube member through the magnetic attraction against a rotor member driving means to prevent loss through displacement upon malfunction.

Other objects and many of the attendant advantages of this novel rotor retaining means for use in combination with a false twist spindle driving assembly will become more readily apparent from the following description taken in conjunction with the accompanying drawing wherein like characters of reference designate like parts throughout the several views.

DRAWING DESCRIPTION FIG. 1 is a front elevational view of a false twist spindle assembly position illustrating one embodiment of the invention on a false twist spindle assembly in which spaced apart pairs of disks are employed in conjunction with magnetic pole pieces to retain a yarn rotor twist tube member in rotating position.

FIG. 2 is a transverse sectional view taken substantially along the plane of section line 2-2 of FIG. 1.

FIG. 3 is an enlarged perspective view of a pair of pole pieces mounted to a block with a yarn rotor tube member retaining means pivotally mounted thereon illustrating the rotor retaining member shown in FIGS. 1 and 2.

FIG. 4 is a partial transverse sectional view of a modified embodiment of rotor retaining means.

FIG. 5 is a partial transverse sectional view of another modified form of rotor retaining member.

DETAILED DESCRIPTION Referring to FIGS. 1, 2 and 3 of the drawing, there is illustrated a preferred embodiment of the invention in which the false twist spindle assembly 10 is mounted on the false twist machine frame 11 with the belt drive member 12 driven from a pulley (not shown) in a conventional manner and rotates the downwardly projecting whorl 13 that is bearingly supported in the housing 14 with the upper end of the reduced whorl 15 having supported thereon spaced apart yarn rotor twist tube driving disks 16 that are vertically spaced from each other by means of the hub 17.

A complementary housing 18 to housing 14 is laterally spaced therefrom for bearingly supporting the shaft 19 on which there is mounted the vertically spaced apart rotor contacting disks 20 spaced vertically from each other by means of the central hub 21.

Shafts

15 and 19 are spaced laterally from each other to provide a rotor tube member receiving throat 22 between the

disks

16 and 20 for cooperative receiving in driving relationship the yarn rotor twist tube member 23 which is provided with axial yarn passageway therethrough with the upper end of the rotor member being provided with a cap 25 through which the yarn will pass continuously at the upper end of which is a cross pin 26 for supporting a yarn convolution thereon. The rotor twist tube member 23 is also provided with an enlarged cylindrical intermediate section 27 of a suitable magnetically attractable permeable material or other suitable magnetically attractable material which will be responsive to the magnetic attraction of the spaced apart magnetic

permeable pole pieces

28 and 29 that are secured to the plate 30 positioned adjacent to the spindle driving assembly and releasably secured to the bracket 31 through the Allen bolt 32 on the machine frame 11.

The

pole pieces

28 and 29 extend forwardly in a converging manner in juxtaposition to the throat 22 provided between the spaced

apart disks

16 and 20 with the laterally spaced apart

pole ends

33 and 34 being spaced apart laterally to provide a suitable magnetic field to attract the yarn rotor twist tube member 23, and particularly the cylindrical portion 27 to be positioned in driving engagement with the

disks

16 and 20 engaging the yarn roller twist tube member 23 as the cylindrical portion 27 is positioned between the pairs of

disks

16 and 20 within the space provided by the reduced

hubs

17 and 21.

A yarn rotor twist tube retaining member 35 is pivotally mounted through the pivot pin 36 which extends through the pole end 34 and the extending ears 37 of the member 35. It is desirable, although not essential, to make the member 35 of a magnetically attractable material, however, it may also be made of a non-ferrous or magnetically attractable material, such as polyethylene, nylon, or other suitable plastic material. In the event the member 35 is made from a non-magnetically attractable material, a magnetically attractable plug or pin 38 is embedded therein so as to be attracted to the pole piece 34 in the closed positions of the rotor retaining member 35 as shown in FIGS. 2 and 3. The retaining member 35 is shown in outline form in FIG. 2 in the open position permitting the placement or removal of the rotor member in the throat 22. The free end 40 of the member 35 preferably projects beyond the pole piece 33 to facilitate pivoting of the member 35 into and out of engagement with the pole piece 33.

An alternate embodiment of the rotor retaining member 41 is shown in FIG. 4 in which the

pole pieces

33 and 34 are bridged by the bar 42 in which there is a rotor tube receiving recess 43 intermediate the length thereof comparable to the rotor-receiving recess 39 in member 35. A U-shaped retainer spring 44 with downwardly extending legs 45 engage the sides of the

pole pieces

33 and 34 for releasably retaining the rotor retaining means 41 in position. If desirable, the bar 42 may be made of a magnetically attractable material for attraction to

pole pieces

33 and 34 or of a plastic material permitting the U-shaped clamping member 44 to retain the rotor retaining member 41 in position.

A further alternate embodiment of a rotor retaining member 46 is shown in FIG. in which the

pole pieces

33 and 34 are bridged by the transversely extending bar 47 which may be of a magnetically attractable material in which there is a rotor member receiving recess 48 positioned intermediate the length thereof. The terminal ends 49 of the bar 47 extend laterally beyond the lateral spacng of the

pole pieces

33 and 34 to facilitate engaging and disengaging the pole pieces. In the event the bar 47 is made of a non-magnetically attractable material, plugs )r pins 50 of a magnetically attractable material may be embedded or passed through the bar 47 for attraction and retention by the

pole pieces

33 and 34.

Obviously many modifications and variations may be made of the rotor retaining means for achieving the end result within the spirit of this invention.

What I claim is:

1. A yarn rotor retaining member for use in combination with a false twist spindle driving assembly having a yarn rotor twist tube member, a rotating rotor member driving means, magnetic means supported in juxtaposition to said rotor driving means for maintaining said rotor member in driving contact with said rotor member driving means, and rotor retaining means directly supported upon said magnetic means for limiting rotor member displacement from said driving means.

2. A yarn rotor retaining member as claimed in claim 1, said magnetic means comprising a pair of spaced apart magnetic permeable pole pieces, and said rotor retaining means comprising a magnetically attractable member reaching across said pole pieces.

3. A yarn rotor retaining member as claimed in claim 2, said rotor retaining member being pivota-lly and releasably connected to one of said pole pieces.

4. A yarn rotor retaining member as claimed in claim 2, said rotating rotor member driving means including spaced apart pairs of rotor member supporting disks forming a rotor member-receiving throat therebetween, said magnetic rotor supporting means permeable pole pieces terminating in juxtaposition to said throat, and said. rotor retaining means magnetically attractable member. being releasably retained by said magnetic means at least partially encircling said yarn rotor twist tube memher.

5. A yarn rotor retaining member as claimed in claim 1, said rotor retaining means being releasably secured to said magnetic means.

6. A yarn rotor retaining member as claimed in claim 1, said rotor retaining member being pivotal-1y connected to said magnetic means.

7. A yarn rotor retaining member as claimed in claim 1, said rotor retaining means being secured to said magnetic means.

References Cited UNITED STATES PATENTS 3,058,289 10/1962 Raschle 5777.3 3,142,953 8/ 1964 Gassner et al 57-77.45 3,232,037 2/1966 Crouzet 57-77.45 3,304,706 2/ 1967 Mattingly 5777.45 3,308,614 3/1967 Stahlecker 57-77.45 3,355,870 12/1967 Mattingly 57-77.45 3,355,871 12/1967 Mattingly 5777.45

JOHN PETRAKES, Primary Examiner