US872328A - Take-up device for sewing-machines. - Google Patents

Description

Kommas. PATENTBD 1520.3, 1901 l M. E. BROWN. TAKE-UP DEVICE FOR swrgm MACHINES.

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UNITED STATES PATENT WEEE MICHAEL- E. B'ROWN, OF `BROOKLYN, NEW YORK, ASSIGNOR TO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TAKE-UP nvrcE FOR SEWING-MACHINES.

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Specification of Letters Patent.

Patented Dec. 3, 1907.

Application iled January 5. 1905. Serial No. 239.777.

ments in Take-Up Devices for Sewing-Ma chines, of which the following is a description, reference being had to the accompany ing drawing and to the letters and vligures ci reference marked thereon.

My invention relates to an improvement l in sewing machine take-ups, of the type used -on the well known Union Special Sewing Machinel and illustrated for example in the patents to Muther vand Woodward, No.

A 299,569,1June A3, 1884, as modified by example, by the structure illustrated in Patent No. 401,776, to Dewees, of April 23, 1889 or 615,647, Dec. 6, 1898, t'o Woodward. In connection with the operation of sewing machines, including this type of take-up, 1t has been found in structures that when the machine isstopped for any reason, with, for example,vthe needles in the goods, that the tendency of the operator is almost invariably yto turn the belt wheel in the opposite direction from that in which it should be turned, andthis results in winding the loo er thread inthe groove of the take-u so t at before the machine can 'success illy start into ofperation again, this groove must be cleare ofits thread.

' It is the object of my invention to avoid this defect,`and broadly this invention conslsts 1n the provision oi a device for guiding the thread Vout of the groove of the take-up cam, so that it will not wind therein. .The invention may be carrled out 1n a number of different ways, several forms of which are illustrated in the accompanying drawings, in which Figure 1 is a side view of a take-up mechanism for a sewing machine embodying my invention, the thread-controlling cam disk `being shown as having a single cam face;

Fig2 is a view similar to Fig. 1 showing the controllingcam in a different position; the front disk being removed g Fig. 3 is a view similar to Fig. 2, Vshowing the cam as accidentally turned backward. and `my im'-v proved thread-.controlling device as throwoifrom saidi cam; Fig. 4 is a view in side elevation of a modified form of my device, as applied to a double cam take-up tmechanism; and Fig. 5 is 'a view in side elevation of another modified form of my device. p

The take-up cam 1 is of the ordinary construction, suchas shown in the Woodward retaining linger 4. A.. Said cast oilI finger and retaining finger are supported by a suitable bracket 5, mounted on the base of the machine. Thread guiding arms 6 are also mounted upon said bracket 5, and extend forward on opposite sides of the thread-controlling cam 1. The thread from the supply passes through guide eyes in the thread arins 6. i

As the thread-controlling cam rotates in the direction of the arrow shown in Fig. 1, the cam shoulder 7 formed by the shape of the cam disk engages the thread running between the said eyes, and as said cam moves forward the cast ofi` finger 3, lifts the thread up the straight lace of the cam until it is cast over said shoulder, The thread is then retained by the retaining finger 4. This operation of the thread-oontrolling cam is well' known in the art, and will not need further description.

When the cam disk reaches the positionA shown in Fig. 2 the thread is released by the retaining finger 4, and as the slack is thenl or in fact, in any other position, the shoulderI 8 on the thread cam l would engage the thread running between the thread eyes and carry the same around into the position shown in Fig. 3, and if no means were provided for casting the thread oil' from this shoulder, it would be soon wound into the take-up and break the thread.

As a means for casting thel thread from the 'shoulder othe cam wheirthe same is turned in/ the wrong direction, I have provided a cast oil' iinger 9, which, as shown in Fig. 3, is formed integral with the cast oil' nger 3, and lies in the space between the disks forming the take-up cam. Said cast o'fl linger 9 extends downward a sufficient distance, so as If, perchance, the Ama-V fue to e age the thread, as shown in Fig. 3, and 'castne saine off from the thread shoulder. If the machine continued to rotate or be turned in the wron direction, the castoif 'finger 9 would continue tocast the threadv Afrom the shoulder on the earn. I have also provided 'a cast off finger 10, which, as shown in Fig. 3, is also formed integral with the cast oi-lnger. "The object .of this finger 10, tov throw thetliread out from the cam disk, 1f the threadl should break and be. carried around the shaft by the forward movement of the cam disk.

A"In'Fig 4, I have shown the take-np cam@ as being provided with two cam faces such as shown,for ex'ample,'in the patengt to Viood-v Ward, 615,647; the operationy of these cam faces will be obvious, from said patent..

i When the cam disk is moving in the direction liso of thearrowf in Fig. 4, the thread will.,be

- carried to the position indicated at 1`1'where' the'saniecontacts with the retaining finger 3, and cast off from the shoulder on thetakeup cam. If, however, the cam disk is 'ro'- tated in the wrong direction, a thread will'be carried to the position shown at 12,' in thisfigure, and-.the cast-0H `finger 9 lifti the thread to a osition so' that it will Vbe cast ofi from theta 'e u cani shoulder.- In this fi ure, the threa 'cast-off' iinger 9 is ma e shorterlthan Ain-glfii s. 1, 2 a'ii'd 3, but must, however, be' of s cient length to cast the thread'off from the-.shoulder of the v4`take-up cain Thev cast-olfA finger v13, in Fig. 4v ,is mounted on a bracket 14, secured to the base of the machinefandeirtends up'ui'iderneath' the shaft and around :the same in the space between the cam disks and operatesto throw' the" thread outofthespace between said cam dlsk, provided the thread is broken -and is carried around the shaft by thetake-up cam. InFig. 5 I havepshown 'my .cast o finger 1 5, as 'mounted 'ongthe bracket 14. It will-'be *obviousy lthat the` cast-ofi'l linger for throwing the .thread from the takeup earn when the same is moved in the Wrong direction, may

be supported -inany suitable manner, so long as the .same'is properlypositioned, 'relative to the take up cam, as to erfoi'm itsfunction. It will also bel obvious-'t at the cast'off iinger may be of any .shape 'or construction other than that shown, vthe essential featurebeing to provide a surfacewhich willcontact with the' thread, and'lift it or cast it from the shoulder on the vtake-up cam.

Having thus described my invention, what I claim as vnew and desire to secure by Letters Patent, is: .f .1. In a take-up device. forsewingmachines, the combination with a grooved` take`- up cam and a cast-ofi` wire, upon which the thread is guided.,` and additional means for guiding the threadout ofthe groove of the take-up .to prevent windingthereon; substantially as described.

in presence of two witnesses.

2. In a sewing machine, the combination with a grooved .take-up cam, a cast-off wire, and a second wire, adapted to guide" the stantiallyas describedf'v '3.- takeup device including incombinathread out ofthe take-up cam groove ;-v subq tion, a cam disk, thread 'uides arran ed on each side offsaid cam and avin eyes or the passage of -the thread, said eyes eing located 'within the outer periphery of the cam, a cast .odevice acting on thethread when the cam is turnedd in yone direction, a second castolf acting on the thread when tur-ned in the op-'1 posite direction; substantially as described.

' 4, .A take,- p for sewing machines having a BS cam surface Aandrmeaiis u on' opposite s1 ofits axis to cast ofi threa from the'cam'surl "face, substantially as'described.

5.. In' a take-up device, arevolving cam surface, thread guides upon opposite sides of said cam surface, a' plurality' of means tov force the thread upon the outer periphery'of the cam surface,'said-riieans"beingv positioned np'onvopposite sides oi said'thread gi'iides;v v90 v 6.'.Atake-up device 'including incoinbinae' substantially as described. Y

tion, a grooved cam having thread-engaging-l with, and means located insaid groove to cast the thread upon .the outer periphery of said` cam surface, when saidcaml is revolved ineither direction substantially as described.

shoulders, vthread vguides v'ceperrafting" there.-

n 7 A take-up device, including combii nation, a disk having a vcam,surfwe and a vconcentric portion, thread-g1 iding means cooperating therewith, and a p urality of means extending beyond the outer periphery of saidconcentric portion for casting 'the thread' from'said cam surface onto said4 concentric portion; substantially as described.

8.' A take-u device, including in combination, ,space camfdisks, forming a groovebetween the same, said'cam disks including a. Y 'i caml surf-ace and a concentric surface, a cast- -oH located in the 'groove `between said cam disks, endearing. a downward extension @X- fendmg 'beyond'the Path Of mOi/'ement of the 'i cam of the first-mentioned cast-of,-and having a prong extending below tl'ie'outei` peripheryofthe take-up; substantially as deascribed.

In testimony whereof I affix my signature',y

'Witnesses.:

' SAMUEL Con'EN,- W2 L. SWIFT,y

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