US1568402A - Spool-retarding means for tuft frames - Google Patents

Description

Jan. 5 1926. 1,568,402

E. F. HATHAWAY SPOOL RETARDING MEANS FOR TUFT FRAMES Filed Jan. 29, 1923 Patented Jan. 5, 1926.

EDGAR F. HATHAWAY, on EL EsmY, essecnusmms, ASSIGNOR TO- SHAWMUT ENGINEERING COMPANY; 11 BqsToN, MssAqiU-smms, e CORPORATION OF MASSACHUSETTS.

' s QQLrBE TARPINZG-MEANB; E03; TUET FRAMES.

epg teetie ed Jewell-1 1323-. et l lie 615 5 9- To all it may concern;

Be it known h I ve t emewen a citizen ofthe Uiiited Stetesj, and resident f W e y,i h eeun y N fo k nd. Stat Massachusett have. invented eel ein, n w and usef l lmpr v heh s h peel: Be erding Means er T t ames, of w i h e ell ing e epe e i n- This inve ition relates to uft frame-1S uch asare'used in weevi gti ft fabricsof the hara er o Axmitieter a p t n the like, n s. h endedite. prov de. simple end eff ve meete to se mingthe esi e t nde io of the yem epe lles t retetes n, he uf ame o permit nwind ng ef t yarn e emf n rder to elivet he' p -formin fts '99 he fab i in t es: in operation.

eh el y sp aking the mpxe em nt een: s s niprovi ing e properly menntedme e eh e brake mem er eeihh ned with tent-ins arrzingedto yieldingly press said brakeme heir nteriet e el nga eme t W h h 'r eteble epe in order eretetd th eme a d eate the. pr pe ra n he yarn as it is uhweu d f em th 'speeli use P o: vieien is als made or se ringehy desired degree of adjustmept to. secure the requisite d gree of e a dation r, braking acti n, end in rde t prote t;the epringehd adjustin hi ne m h erfet' ng wit er eteh n he arn provision is" also made whereby} the pr e dite. adjust memb t iey belegit d insi e t el w'eerrier he fe ming the btldkbgl l of the t ftgf ren e. Theseend other aturesv f h n 'enti-e will e blamed n" the follow ng s eeifieet e end will be defined in theela ms rete an exed.-

In he accompany ng raw ngs ,lheveillus: r t-ed eev e t rm of en rii tienahd er: 1 g mentfemhedy n the ptine p es ei this invention, in which? F gu e 1 is ren elleve ien t e po io ef he spQ l-ee ry tuft. rame;

Figure? s en e v le etien e he ew viewed from the ir s id e with the hol low cer- 'ie h r hewn n ee ve etiet re 3 i e ron evatio pa ly n e e i i howing t modified: e m' et t'ek ns 'heti m F er f s ehettiw se view a the s ine Viewed from the inside showing the carrier h nf l s see e i -Figu es 5 andfi are views similar to Figuites 3 and gt showing another modified eone u' tien and rra g men i The carrier bar 1, the suspension brake 2, with the gheip-engaging hook arm 3, and the po -supp t n ee 1 4 n whi is mounted the journal of the spool 5 are s w embody ng the same enetr e on o d fer nt terms t, t e i ve tien n m 219 pa t oihe, p s t mprov me I the p eeti efmy n enti e dits he; erm h h h F es 1 d I provide brake lever 8 Which intermeieite of. nds s at s piv e o the utti e e, in this. case direct y oppo te o th suspension brake 2;

At its spool-engaging end the brake arm Q-f the et-e 1 s pre erab y p ov ded i h e firie eh-ped hQelQ wh ch may h ade Qt rewhideg fibre. or. any u a le material- The power arm v 1 1 of the brake lever is engule rly disposed i reletionto the workmg: r' n s ee oe tend a ee f n fa e -f he arrie he 1, e d s p r at t r ceive a heede l 2 Wh e s p s d through an apeigt re. 13 in the face of the h e lew e r er e end a i s at t S e threaded end an adjustable nut let which is acc ssib e, h o g t e apert re 15 n he eppesi e e of he e lew a r e nd Wh h recei es he thrust o e he i epr 1. e es; ie ei e y eld ngp l up n the e irm ll, whereby thebrake; ar of, the lever is yielgiingiy pressed intoifriotional-engagee m n ith" he p ip ry o h p o e pad lQ being, to all intents and purposes, a

Pert-ef h brake, e

n order. to'adjhett e t si f he br k membeiyageinst the spool the thrustinem- 1,4 may be turnedgineither direction by a screw-driver or other tool either to furt e compr ss the pri g e to ow it to expen e e any d i e degr kingp 'essure may-be brought to bear upon the fspoolywhile at the-same time the spring and the edjustable thrust member being 1ooated'inside the hollow carrier bar, are pgoteeted against entanglement- With the tuft ya n pas ing irate the 49 91 to the new;

individual tuft tubes (not herein shown as they are well known and form no part of the present invention).

In the form of the improvement shown in Figures and l an angular spring lever 17 is provided whose brake arm or working member is provided with a friction shoe or pad 36 and whose power arm 17, angularly disposed to the working arm, is located inside of the hollow carrier bar, the intermediate or fulcral portion of the lever being formed into one or more pivotal eyes 18 which surround a fulcral pin 19 mounted just inside an aperture 20 formed in the top of the carrier bar, preferably a little beyond the attaching arms 6 and 7 ofthe suspension arm, thereby avoiding perforating of both the carrier bar and either.ofits attaching members for the passage and free working of the lever. An adjusting screw 21 passes through the suspension arm 2 where it closes the end of the hollow carrier bar and carries a thrust member in the form of a nut 22 to which one end of the helical spring 23 is attached, the other end of the spring being connected with the power arm 17 of the brakelever- The contractile tension of the spring serves to press the brake pad into frictional engagement with the periphery of the spool. This pressure will be varied according to the position of adjustment of thrust member 22.

The form of the invention shown in Figs. 5 and 6, employs a movable spring-pressed brake member whose movement is in straight line instead of in a circular arc.

In this form the carrier bar has opposite perforations located in the plane of the spool head and in substantially radial relationship thereto. It comprises a hollow spring casing or plunger 25, on which is preferably mounted a. friction pad 26 and is slotted along one side to receive the laterally projecting guide lug or pin 28 of a thrust nut 27 which is adjustably held at any desired position according to the adjustment of the adjusting screw 29 by the relatively stiff supporting spring 30. The brake tensioning spring 31 will exert a frictional pressure between the movable brake member 26 which will vary according tothe position of the thrust member or nut 27. The spring serves to keep the head of the adjusting screw always seated against the bottom wall of the carrier bar and is therefore stiffer than the spring 31. V

The form shown. in Figs. 36 have one advantage over that shown in Figs. 1 and 2, since there is at all timessubstantially the same area of frictional contact between the brake and the spool, as the pads wear, due to the fact that inboth said forms the movement of the pads are in a plane longitudinal or axial of the spool.

An important feature characterizing all forms of the invention consists in an arrangement which permits the use of a comparatively rigid or inflexible brake member in association with some form of tensioning spring, thereby avoiding the weakening and uncertainty of action of brakes characterized by flexible spring arms which are easily distorted in use.

lVhat I claim is:

1. In a tube frame for tuft weaving, the combination with atubular carrier bar for externally supporting a series of tuft tubes, a yarn spool rotatably supported lengthwise of said carrier-bar, a movable brake member arranged to press against a peripheral portion of said spool, a brake-actuating spring mounted inside said tubular bar and operatively combined with said brake to force the brake yieldingly against the spool, a tensioning screw projecting through an aperture formed in an enclosing wall of said carrier-bar for connection with said interior spring and acting, by its adjustment, to vary the pressure of the brake against the spool, substantially as described.

2. In a tube frame for tuft weaving, the

combination of a hollow carrier-bar, a yarnspool rotatably mounted thereon, a pivotal brake arm arranged to swing between the spool rim and the top of the carrier-bar, a brake-actuating spring located inside the carrier bar and operatively combined with the brake to cause the brake to yieldingly press against the spool rim, substantially as described. 3. In a tuft frame for weaving pile fabrics, the combination with a supporting frame and its rotatable yarn spool, of abrake arm pivoted intermediately of its ends to the spool-supp0rting frame to swing it into braking engagement with said spool, and means for causing said brake arm to normally press against the spool in order to retard rotation thereof, substantially as described.

Fl. In a tuft frame for weaving pile fal rics, the combination with a supporting frame and its rotatable yarn spool, of a brake lever pivoted intermediately of its ends with one arm disposed to normally press against said spool to exert frictional retardation thereon, and a spring arranged to press against the other arm of said lever to maintain such frictional retardation, substantially as described.

5. In a tube frame for tuft weaving, the combination with a carrier-bar and its rotatable yarn spool, of a movable brake member arranged to frictionally engage a head of the yarn-spool to retard rotation of the spool, an actuating spring combined with said brake member to cause the brake member toyieldingly press against the spool head, a spring-engaging threaded nut and an adjusting screw therefor, said. nut being adjustable by means of said screw to vary the position of the nut, thereby varying the pressure of the spring-actuated brake against the yarn-spool.

6. In a tuft frame for weaving, the combination of a hollow carrier bar and its suspension bracket secured thereto, a rotatable yarn spool, a movable brake member arranged to frictionally engage said yarn spool, a tensioning spring arranged to yield ingly press the brake member into frictional engagement with said spool,'and an adjustable thrust member by which the frictional pressure is varied and an adjusting screw having threaded engagement with said thrust member and projecting through a wall of the carrier-bar, said spring and said thrust member being mounted inside the carrier bar, substantially as described.

7. In a tuft tube frame for weaving, the combination of a longitudinal carrier bar and its associated yarn spool, of a movable brake member of substantially rigid material and a separate spring arranged to yieldingly press said rigid brake member into retarding contact against a portion of the spool, substantially as described.

In witness whereof, I have subscribed the above specification.

EDGAR F. HATHAVVAY.

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