US890881A - Rotatable spindle and bobbin. - Google Patents

Description

PATENTED JUNE 16, 1908.

0. A. SMITH.

ROTATABLE SPINDLB AND BOBBIN.

APPLICATION FILED AUG 27 1907 i 4.0 6 E Q lllumllllhu H i the bobbin,

'45 the bobbin being.

OHOPEDALE, MASSACHUSETTS,

I .No;.890,881.

HOp edale, in the "I'm rovement in To (in it may Be it known-that I,

citizen of the United States,

.RO'IATABLE-SPINDLE AND 30:51am;

. s ecification-6f Letters Patent. Application filed. August 27,1907. Serial No. 390,310.

concern:

CHARLES A. SMITH, a and ares ident of ounty of Worcester "and State oiMa'ssachusetts, have invented an Rotatable Spindles and Bo bins, 'of which the following description,

- connection with of' the type is aspecification,

1 0 ing representing like parts. 'Thisinvention relates wherein the accompanying drawlike letterson the drawto rotatable spindles the bobbin is engaged and driven with. the spindle by or through. the medium ofcentrifugally-acting clutching means, comprehending members rotated by and with the spindle and loosely connecte therewith,'to be caused by centrifugal force. to'firmly engage the; bobbin and thereby efiectlits" rotation in unison with the. spindle.

In practice there 1s alt-times a tendency of thebobbin to swing or move laterally-,,out' oftrue, particularly at the lowerv or butt end,

notwithstanding fthe' centritugallyacting clutching members. '25 Such movement of driving engagement of the bobbin gives rise to undesirable'vibrations and tends -to improp- --erly aiiect the'operation of the apparatus, and various arrangements have been devised to overcome such less success. My present mven I roduction of simpleower end or butt of" a objection,,with more or tion hasfo'rits object the means whereby the bobbin is effectually steadied when-placed on a rotatable spindle provided with -centrifugally-acting clutching -means, the construction and arrangement being such that the butt of the bobbin has no lateral movement relative to the spindle, and

hence the objectio 40 out are completely In accordance with my present invention I provide a steadying portion located 'below with relation to the spindle, bored to provide a part adto receive the steadylng p0r.,

means and fixed jacent its butt 'tion with a snug. but nonns hereinbefore pointed overcome.

for the butt of the' clutching driving fit, and the Y bore above such part is-ota different diameter, to receive and be engaged by thecentrifugally-actingclutching means on thespindle. By such construction the proper action of the clutching means is in no way inter- I iered with nor are the many advantageous l space Fig.

- loosely surroundin A CORPORATION OF. MAINE.

Y Patented. June 1c, 1908.

diminished, while a the bobbin at'its lower end is steadied and maintained true-and concentric to the axis of .rotation of the spindle.

The novel features of my invention will be fully described in the subjoined specification an particularly pointed outin thefollowing' claims.

Fi ure 1 is'a-side elevation spin le I of the. centrifugally-acting t pe, with the bobbin thereon in section, 'lustrating one embodinent' invention, the blade of the-s barrel of the bobbin being bro en out'to save 2 is a detail artly in section and :"partly in elevation, to s ow the' construction of the parts on the spindle; Fig. 3 is a vertical section of the lower portion of the bob.- bin, showing the bore thereof havin adjacent portions of difierent diameters; I i 4' is a horizontal section on the line di l, ig. 1, looking down upon the clutching means and adjacent parts on the spindle. The spindle 1, whirl 2 having an u turned sleeve 3-'by whi h it is attached to t e spindle,' the enlarged circular head 4 at the upper end of the sleeve andforming a vertical rest or support for the bobbin B, and the transy segmental .clutchin members 5 the spin e, maybe and are all substantial y as: in various forms of spindles of thecentrifugally acting type now in use.

. verse of my present indle and the) MASSACHUSETTS,nSSIGNO R T0 nRAPnR'coMPANY, or I of a rotatable clutch As-shown. herein the clutching members i I are shaped externallyin usual manner and are loose at their upper ends, and herein I have shown their lower ends as entering an annular groove or recess- 6 formed in the upper end or top of a cylindrical enlargement 7 extended upward from the bobbin-rest 4.

Retaining pins in the lower ends of the members '5, one for each member, to positively connect them 8 are passed through holes. v

with the spindle to rotate therewith and also to prevent their removal, the pins permitting the re uisite radial movement of the upper ends'o the clutching members due tocentrif- .ugal action when the spindle is rotated,

while the outer wall of the recess 6 limits such movement.

The enlargement 7 at the lower ends of the *clutchingmeans is fixed with relation to the spindle, as willbe manifest, and it serves. as a' firm lateral and steadyin device for the lower, end or butt of'the bob in, as will be explained." j

"Referring tofFigsl l and? it Wi l be seen' thatjthe diameter of the part7 ,is somewhat members. v

The bobbin B is counterbored a't'its'butt end to present a cylindrical part ,b at the .mouth of the bore, immediately adjacent the butt, and a second cylindrical part b above the part but'of less diameter, and also of greater length asherein shown, Figs. 1 and 3. The part b formsan internal chamber to receive the clutching means of'the spindle, the

, clutch members 5 being forced outward by centrifugal action to engage-the walls of the chamber 1) and by such driving engagement the rotation of the bobbin in unison with the spindle'is effected. The part b of the'bore of the bobbin is of such diameter that itsli s onto the enlargement 7 with a 'steadying t,

' that is, withno appreciable play but with asmooth and relatively snug fit, but in no sense a driving engagement.

As a result of the above construction the butt of the bobbin hasno lateral movement relatively to the spindle and runs perfectly true with relation thereto, while the driving effected by the clutching Ineans,'- as will be obvious.

. When the bobbin isapplied to hes indle the expanded upper portions oft e-c utching members are somewhat compres'se'd or pushed inward as they enter the smaller {part or chamber bf of the bore, to insure a firm driving engagement therewith."

By reference to Figs. land 3-, it will be seen that the barrel of the bobbin adjacent the butt is of relatively small diameter, such form-of bobbin having been devised more articularly for 'use in so-called -.feeler ooms, it being desirable to make of small diameter, the part of the-barrel on which the bobbin when used with centrifuga yarn iswound'with which the ieeler cooperates. Such bobbins at-best have a thin Wallat the junction of the barrel with the butt, and in order to maintain the 'stren th 'ofthe ly-acting clutching means, it is absolutely necessary that such means operate within a chamber or opening of the smallest possible diameter. For that reason the part b of thebore is ,made of considerably smaller diameter than the part b, for if the diameter of such part b j should be continued up the full length of the bore in the bobbin-butt it would so weaken the bobbin at the 'unction of the barrel with the butt that'a re atively sli ht blow would break the bobbin. This wil be clear from an inspection ofeither' Fig; 1 or Fig. 3 of the drawing. Such a uniformly large herein the butt has been found in practlce impracticable and has been given up for the reasons above set forth. The lower end of the bore asp the butt must-be of larger diameter than theupper part or chamber 6 because j v I thepart I) must receive the'steadying ortion greater than the diameter, ofjfthe' bobbinengaging or clutching surfaceof thelclutch the enlargement must be made large enough to loosely surround the lowerends ofthe clutch members 5. It is of great importance, therefore, that the lower chamberin the bobbin butt, i. a, the one adjacent its outer end, shallbe ofrelatively large diameter and it is of. equal importance that the upper chamber-be of as small diameter as will receive the clutching means, on account of the necessity to maintain as much material as possible in the bobbin at the junction of the barrel with the butt. i The counterboringof the bobbin to provide the two adjacent portions of different .diameters'is very easily'effected, and the steadyingv device on the spindle at the same time aflords a. convenient means for vertically sup orting and laterally confining-the lower end of the clutch members. f

Havingdescribed my invention, what I :claim as new and desireto secure by Letters Patent is r 1. The combination, with a rotatable spindle-provided with centrifugally-acting clutch ingmembers to drivethe bobbin, a cylindrical enlargement fixedly said members, and ositive connections betweenthe lower en s of, said members'andthe enlargement, effecting their rotationf oo mounted below l with the spindle while permitting limited 'ra 7 dial movement, of a bobbin having its butt boredtojreceive said enlargement with a steadying fit and provided withan internal chamber of less diameter to receive and be enga ed .by the up er ends of the clutching mem ers to drive t e bobbin.

2. The combination, with a rotatable spin- 'dle provided with centrifugally acting,

transversely segmental clutching members surrounding. the spindle and adapted to internally engage and drive the bobbin, a cylin- 1 drical enlargement fixed on the spindle and rovided With an annular recess to. receive oosely the lower ends ofsaid members and radial ins loosely connecting the lower ends of said ameter to receive said enlargement with a steadying fit and reducedin' diameter above to receive and be engaged bythe clutching v3. .The combination, with a otatable spin dle provided with centrifugally-acting and transversely segmental bobbin clutching members, a cylindrical enlargement fixed on the spindle and having an annular recess to loose y receive the lower endsof said memi members and said enlargement, of a bobbin having its bore at the. buttof a di-- bers, and connections between the lower lar recess acting upon the clutching members ends of said members and the enlargement, to limit outward radial movement thereof of a bobbin counterbored at-its butt to prewhen the spindle is running bare.

- sent internal cylindrical portions of different In testimony whereof, I have signed my 5 diameters, the lower portion of larger diamname to this specification, in the presence of 15 eter receiving the enlargement with a steadytwo subscribing witnesses. I ing fit and the upper portion, of smaller di- CHARLES A. SMITH. ameter, receiving and being acted upon by the upper ends of the clutching members to 10 drive the bobbin, the outer wall of the. annu- Witnesses:

GEORGE OTIS DRAPER, ERNEST W. W001)

Images