US1872023A - Transfer comb - Google Patents

Description

Aug. 16; 1932 Q c; ALVQRD i,872,023

TRANSFER COMB Filed April 26', 1930 4 Sheets-Shee l f lNVENTOR 1932 c. c. ALVORD 1,872,025

TRANSFER COMB Filed April 26. 1930 4 sheets-sheet 2 INVENTOR Aug. 16, 1932. c. c. ALVORD 1,872,023

TRANSFER COMB Filed April 26. 1930 4 Sheets-Sheet 3 g- 16, c. c. ALVORD 1,872,023

TRANSFER COMB Filed April 26. 1950 4 Sheets-Sheet 4 INVENTOR Patented Aug. 16, 1932 CHJEBRLESH CLINTOLL. -.ALVORD,M OF WORCESTER, MASSACHUSET'IS;. ASSIGL OR TO WORCESTER.- LOM- WORKS OF. WORCESTER COUNTY, .MASSAGHTJ'SETTS.

Myuinventionzrelates toxtheitransfer icomb connnonlypuseda-to secure :in properly spaced; relationithe free ends of the atuft'yarns L011 AX-j! minsterztube'rframespools-e I These .combs are? applied-to the. yarnstrands; at the setting; 1; frame-nude remain :with theispoolsa while they; aredn: storage. :;They-.keepthe *yarnsdn proper order -:prepar atory:-.to beingthreaded through the tubes: of tuft i yarn frames: 1 a This opera-: tion WlllGh involves the use a of the :transfer comb is: welt -described in the: threading. machine patent to Hathaway andLe-zmzfiz 1 1 513,8.6di Of: 8 611111214; 1915s I v f The type of transfer comb now: i in 1186*; is

: clearlyishownr-in Fig.1 ll-of-thatapatentn 1t will be noted that- Hathaway'andLiea employ? a cap:piece118-to retainzthe yarns.-;.It is1-the: main. object of my invention :to prodneeaai transfer 00mb awhich -will'; retain. the l yarns without the fuse {of such.- a'ca'p piece.-.-: Another object contemp l ates. the iuseof suitable :meoha-i nism-toengage the comb with the yarn: strands z and-other? obj ects willibe sdescribedandpointe ed out in thePappendedclaims: V

My-invention; will-be 'bestefunde'rstood; by referenceto the following .-.desc-ription: when. taken :connectionwwith :the'accompanying: illustration of one specific embodimentzthere of, .while. its scope will vbe moreparticularly pointed out in: the r appended? claims. a

In the drawings 1 =Fig.; 1.:is a side elevation of one preferred mechanismfor engaging-the. transfer: combwi-th theiyarn strandsw Fig-2;; is a plan of .Figa 1;. Fig. 3;.is. a fnagmentary- 1 5 enlarged perspective vievw of one of the itr-ansa wide as the pitch or center to center distances other: member:" 'Whentthe. :combi'clampni 100 fercomb .squeezersm Fig; 41; shows -':n1y-=new transferv comb enlarged andnin perspective,- part of the-teeth-=being.show-n: asnormally closed "while 2 others rarer. shown 1-flXedfiand readyz-to' receive the yarn-strands. Fig. 5vis1 an enlarged; fragmentary frontviewwof my transfercomb \o-perativel-y positions d. with re:- 2 spect to the rear squeezer; and Fig. 6 is: as view similar to Fig. 1 showing the mechanism swungi downito-its low 1 position.

Aswill'beseen by Fig. l mynew transfer? comb: is:- formed. of a 1 piece of sheet 1meta-l-1.- provided-with :acseries :of "teeth 2,! the-base of -'each-.=t.oothbeing substantially half 5 as TRIANSFERTCOMB 1930. Serial 110. 447,585.

between adjacentteeth, thus formingtyarn receiving slots-3 for-thespacedretentionot pile'yarn strands,- one of which is shown as 4. vThe apices ofthelteeth are substantially incontact at 5;so asnormally to close the yarn receiving. slots 8. Transfer combs are often '54 long and since. the comb-body lis relativelydight, springy'ma'terial 1 prefer to QmPlOYylSFVO stiEeners-G and T riveted; or otherwise secured'to the body to provide thenecessary rigidity.. To permit the broadside entrance of the pile yarnstrands I pro videmeans to flex theteeth alternately sides I frame described in Patent 1,185,633, I have 1 indicated tension rollers 8 and yarn spool 9 corresponding respectively to Collins rollers; B and yarn spool E.- Reedcomb 10 is also the same as his comb D.

To the setting-iframe sides 11-1 boltibrackets 12 which provide bearings for cam shaft 13. Fixed girtl extending between brackets 12 serves asa fulcrum-forswing stand 15 to which. is screwed toothedrmember: 16. T he teeth on this member are clearly shown in Fig. 3 and: are of the-same spacing as the teeth on the transfer comb v Resting upon the planed feet of member 16 is-anothermember 17 similarlyeequipped with teeth. Member 1 '17 is registered=-longitudinally -::with respect 'lJOrIflQI'Il bB'I? 16 ":by. being slida'b'ly. mounted ondowel-pins'18-to assure that the teethon thertwomembersaarewim alignments It willbe noted :thateveryiother tooth is pros vided :with awprojeetioir 19;, .suchprojections: occurring. on- .the -..odd;numbe-redateethzon one member and the evenwnumberedfteethaon the=s dropped between these two squeezer members 16 and 17 and allowed to rest upon dowel pins 18 as shown in Figs. 1 and it will be seen that the projections are opposite the apices of the teeth. Now if pressure is applied to member 17 tending to urge it against the transfer comb, the projections on the two squeezer members will, in cooperation with each other, flex alternately sideways the transfer comb teeth to permit the-broadside entrance of the pile yarn strands. The maximum offset possible is d finitely fixed by the :eight of the projections as it cannot exceed I-I an amount 2 the projection. Under maximum fiexure there is a certain calculable stress in the comb teeth. I so proportion the height of the proj ections and the dimensions of the comb teeth that the maximum stress cannot exceed the elastic limit of the material from which the transfer comb body 1 is formed. Thus when the squeezing pressure is removed the transfer comb teeth will resume their normal positions in the same plane. By this unique construction I eliminate all possibility of the stress in the comb teeth exceeding the elastic limit of the metal as a permanent set or bend in the teeth would thereby be produced. To position the transfer comb in proper alignment with respect to the squeezer teeth I provide two registering pins 20 located immediately adjacent the ends of the comb to prevent longitudinal movement. When the operative inserts the transfer comb between the squeezer members the mechanism is in the lower position as shown in Fig. 6. There are two similar cams 21 keyed to cam shaft 13. Rollers 22 journalled upon studs fast in swing stand 15 bear on these cams. The cam lobes upon movement of the cam shaft by handle 13 rotate the swing stand to its upper position as in Fig. 1. As the squeezer members rise the pile yarn strands start to enter their proper slots in the squeezer members but they cannot enter the transfer comb yet as the squeezers have not been forced together. They are thus lifted slightly above their normal po sition and placed under added tension preparatory to snapping into the transfer comb after the teeth have been flexed.

Referring to Fig. 5 it will be seen that the pointed apices of the squeezer comb teeth extend somewhat above the substantially arcuate apices of the transfer comb teeth.

The squeezer comb being milled from the solid naturally is of a higher degree of accuracy than the punched transfer comb and it is for that reason that I prefer to extend the apices of the squeezer above the transfer comb in order that the ribbon of yarns may be initially contacted and separated by the more accurate of the two combs. Once the yarn strands have entered between the teeth in which II the height of of the squeezer comb they will be guided by them into their respective slots in the transfer comb. I prefer to use the rounded form of apex shown on the transfer comb as there is much less chance of this shape catching on the yarns on adjacent spools when in storage or at other times.

I will now describe one good form of mechanism which may be employed to flex the comb teeth. 7 There is a fixed girt 23 extending between two depending lugs on swing stand 15. Two cam levers 24 fulcrumed upon this girt are provided with rollers 25 bearing upon similar cams 26 keyed to cam shaft 13. The upper ends of cam levers 24 terminate in lugs 27 tapped to receive adjusting screws 28 so situated that the heads bear against the front squeezer member 17. Continued rotation of cam shaft 13 forces the front squeezer member rearwardly to flex the comb teeth as previously described. I provide screws 29 tapped into lugs integral with the setting frame sides 11 to bear against the hubs on cam levers 24. The purpose of these screws is to prevent any further'lift of swing stand 15 under the squeezing pressure exerted by cam lever 24. As soon as the comb teeth are fully flexed the pile yarn strands snap down therein and squeezer cam 26 immediately relieves the pressure allowing the comb teeth to spring back into line with each other. The front squeezer member retracts sufliciently under the action of spring 30 to provide sufficient clearance for the squeezer members, upon continued rotation of cam shaft 13, to swing down back to the position in Fig. 6 leaving the transfer comb hanging on the ribbon of pile yarn strands and in easy grasping posi tion for the setting frame operative.

Summarized briefly, one revolution of cam shaft 13 swings the transfer comb'up against the pile yarn strands, flexes the teeth to permit broadside entrance of the yarns, closes the teeth, opens the squeezers and then drops them allowing the transfer comb to remain hanging on the yarn strands. -This entire cycle may be performed with great rapidity, much quicker in fact than'the older method of picking up a cover piece and securing it to the transfer comb. Moreover there is no pos sibility of the yarns coming out of my transfer comb during the many handlings it receives during storage and threading.

' While I have shown but one good embodiment of my invention I wish it understood that various modifications may be made without departing from the spirit of my invention. 1

I claim:

1. As a new article of manufacture, a. trans fer comb for tuft yarns in which the teeth are relatively flexible, the apices of said teeth normally being substantially in contact so as positively to prevent broadside egress of the yarns.

2. A transfer comb for tuft yarns pro vided with a series of relatively flexible teeth, the base of each tooth being less than the pitch of the teeth so as to form yarn receiving slots between adjacent teeth, the apices of adjacent teeth normally being sub-, stantially in contact with each other so as practically to close the yarn receiving slots, whereby yarns positioned in said slots are retained positively against broadside escape.

3. In combination a transfer comb for tuft yarns comprising a piece of sheet metal provided with a series of teeth, the base of each tooth being substantially half as wide as the center to center distance of the teeth so as to form yarn receiving slots between adj acent teeth, the apices of adjacent teeth normally being substantially in contact with each other so as practically to close the yarn receiving slots, with means adapted to flex the teeth sufficiently to provide broadside entrances for yarn strands into said slots.

4. In combination, a transfer comb for tuft yarns provided with teeth adapted to be flexed sideways to permit the broadside entrance of tuft yarns therebetween with means for flexing alternate teeth of said comb, said means being shaped and arranged so that the tensile stress in the teeth when fully flexed is below the elastic limit of the transfer comb material whereby the teeth will return to their normal position when the flexing means is retracted.

5. In a device for flexing the teeth of a transfer comb, two opposing members each provided with a series of aligned teeth, the even numbered teeth on one member and the odd numbered teeth on the other member being equipped with projections formed to flex sideways alternately the teeth of a transfer comb interposed therebetween when said members are forced toward each other, the height of the projections on said members being such that the device is rendered incapable of flexing the teeth beyond a predetermined amount.

6. As a new article of manufacture, a transfer comb for tuft yarns in which the teeth of said member must be under stress to permit broadside entrance of the tuft yarns therebetween,

7 The combination with a flexible tooth transfer comb for tuft yarns of a member secured thereto serving as a stiffener member and also as a lateral guard for the teeth whereby excessive sidewise flexing is prevented.

8. A transfer comb for tuft yarns in which the apices of the comb teeth normally are substantially in contact so as positively to prevent broadside escape of yarns positioned between said teeth.

9. Mechanism for engaging a flexible tooth transfer comb with a ribbon of yarns comprising a squeezer adapted to receive said comb and means, first to actuate said squeezer to flex the teeth of said comb and then to move said comb into operative engagement with said yarns, whereby said yarns are threaded broadside.

10. A transfer comb for spacing and retaining pile yarn ends comprising a series of alternating tooth and slot formations, said teeth being provided with integrally-formed yarn retainers positively'to prevent broadside escape of yarns positioned in said slot formations.

11. That method of engaging a flexible tooth transfer comb with a ribbon of yarns which comprises placing the comb within a squeezer, actuating the squeezer so as to flex the comb teeth to permit broadside entrance of the yarns, raising the ensemble to permit the yarns to enter between the teeth of the comb, releasing the squeezer to permit the broadside threading entrances on the comb to close and then lowering the squeezer leaving the transfer comb suspended on the yarns.

12. The method of engaging a transfer comb having tooth apices of substantially blunt formation with a ribbon of yarn strands which consists in temporarily positioning sald transfer comb ad acent an auxiliary comb having tooth apices of substantiallypointed formation, the apices of the transfer comb being located slightly below the apices of the auxiliary comb, and moving the ensemble toward the ribbon of yarns to permit the pointed apices to initially contact and separate the ribbon of yarn strands to guide Fibs them accurately into place between the transfer comb teeth.

13. A transfer comb for tuft yarns provided with yarn spacing teeth which are shaped to prevent broadside passage of the 113i? yarns therebetween, said teeth being adapted to be moved apart from each other in a direction substantially parallel to the yarn strands so as to provide free broadside passage therefor. I

In testimony whereof I have hereunto afflxed my signature.

CHARLES C. ALVORD.

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