US1674010A - Spacing device for loom dobby fingers - Google Patents

Description

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UNITED STATES 1,674,010 PATENT OFFICE..

ELBRIDGE n. nourris, or WoRoEsTnn. Massacisnsrrrfrs,` nssreivon To onoMrToN an KNowL'Es Loom wonxsfor wononsrnr., resserrer-inserirsi, A 4coniaonnrron or MASSACHUSETTS.

SPACING DEvIoE roiirooiifnonY rmenns.

Appiirianon fiied AugustY 24, 192s. seriai No. 131,290.

This invention relates to improvements inv loom dobbies and it is the principal object l of the invention to provide' a dobby sofconstructed yas to permit the usel of a simplified formoffsheet niet-al `dobloy finger. y

Dobby fingers must he Speced and kept in alignment with the pattern mechanism, this" resulty being 'usually acoinplished y by having the outer ends of the fingers yof reduced thickness to cooperate with the teeth ofthe Separating coinbl It has been proposed heretofore to make dobby fingers of relatively thin sheet steel folded 'together to make the lbody of the required thickness and having the outer ends formed of a single thickness to ybe thinner-than the body `to ceoperate with fthe comb.` Should 'a dobby finger of thensiia-l form'be made of a single piece of sheet steel a separate operation would be necessary Ato lform the thinouter end. It is anliinportant object of my present 'invention to providedobby fingers of relatively thick sheet metal shaped to fit an improved separating comb which `does not,r

require that the finger ends be reduced.`

It Ais amore detailed object of my invention to provide two types of fingers, one off which shall be slotted .to receive aseparating peg which Will, guide adjacent fingers which are notslotte'd. A v

.In certain picking out operations in a loomfit isdesirable to be. able to bring all ofthe warp threads to the Same plane, this loonissuch as heretoforeconstructed, a very simple device has been provided for raising all of the dobby fingers, a condition which corresponds to lowering all of the hooks. Asgone or anotherfof the knife bars-.moves outwardly, therefore, all of the harnesses will he raised, and this operation, known as levelling up, can be accomplished very readily 'because of the manner in which-the `dobby operates. It is a still fiirtherobject ofmy invention to form the dobbyfingers,

in addition to the manner already described,`

with aligning lower edgesto cooperatev with the levelling device. e

,Debby fingers usually cooperate with pegs carried. on the patternchain and must `be provided with a runton their under surfaces y 'to support the hooks and serve as guidesfor to receivethe peg; It is a further object of my invention to form4 the peg engagingpart of the' fingers with concave runs somewhat wider than the thickness of the sheet inaterial of which the finger is formed and further to providecertain of the fingers with offset portions to engage the other fingers, tothe end that all ofthe fingers may be properly aligned so that the runs will not interfere with each other and will be properlylocated with respect to the pegs ofthe pat-tern chain. V

lVith these and other objects in view which will appear as the description'proceeds, iny inverrtion resides inthe combination and arrangement of parts hereinafter described and .set forth in` the claims.

In the accompanying drawings ywherein I have shown av convenient embodiment of my invention,

l is avertical section through a dobbyhaving my invent-ion appliedthereto,

Fig. 2 is a fragmentary topplan view taken in the direction of arrow- 2, Fig. l, w

Fig. 3 is a vertical sectionon line 3 3 of Fig. 1,

Fig. i is a side elevation of one of the ingers,f preferably one y which cooperates with the lower hooks,. e V

Fig. 5 is a lview of the other style of dobby finger which cooperates with" the upper hooks,

F ig'. 6 is a detail operating view Showing thc lingers held in raised position by the levelling device,

7 is an enlarged lineT-T of Fig. l, n

Fig. 8 is perspective view of the levelling device, and l 1 Fig. 9 is an enlarged horizontal section on line 9 9 of Fig. 4 i y Referring to the drawings, it will be seen that I haveV provided a harness jack 2Oy pivoted on a fixed pin 2l and having pivotal connection as at 22 with a dobby back lever 23. ,The upper end of said lever is pivoted to la hook 24 which cooperates with [a horizontally reciprocating knife 25 while thelower end of said lever is pivotally conhorizontal section on ico nectedrwith hook Q6 which cooperates with of knife 25. y Fixed stop barsk 2S position the lever 23 and other bars 29 may be positioned the lifting wires to be described hereinafter.v

.There will be .several jacks levers, ,dei

pending upon the number of harness frames in the loom.

The pattern mechanism comprises a eylin der 30 movable on a shaft 3l and cooperating with chain bars 32 having pegs 33 to present the latter to indicating position, either each pick ot the loomy it the (lobby be ot the socalled single index type or every second pick o f the loom, it the dobby be double index.

The dotted frame (Z has secured thereto a bar preferably made ot wood and indicated at 34;. held in place by means ot' bolts 35 which pass through thc bar and also through the. foot 36 ot an open bearing 3T so 'formed as to have a substantially semicircular opening 38 which is closed by the lower outer edge ot bar 34T. It is to be understood that the bar l-l extends tor the tull width ot the dobby and that there are two open bearings 2li'.

The levelling device L is formed substantially as shown in Fig. 8 with bearing portions $39. one ot which is rei'eived by each of the openings 3S. Said lcifelling device is provided with one or more handles tlf) by means ot which the same may be turned 'from the position shown in Fig. l to the position shown in Fig. The levelling device shown herein is merely illustrative and l do not wieh to be limited to the particular form shown.

ln carrying out my present improvements, l provide two distinct types ot (lobby fingers which cooperate with a special form ot comb. The type of finger 50 shown in Fig. has a substantially straight inwardly extending tail 51 on which rests lifting rod .32. there being one rod tor each ot the upper hooks 2li. The opposite end of finger 5f) is enlarged as at 5S to add weight is usual with dobby fingers. The type 54 .shown in Fig. 4A has an upwardly curved. tail 55 on which rests one o' another of the lower hooks 2G. rlhe opposite end ot said finger :1l is also enlarged as at 5G but said enlargement is turf-her provided with a vertical slot 5T tor a purpose to be described. The fingers of both types are provided with support-ing notchesI 58 which receive a rod .59 and there may turfher bc provided a wire Gt) extending above the rod 59 to prevent improper upward displacement of the fingers.

The bar 34 is provided with relatively short upwardly extending pins G1. so proportioned as to lie within the vertical slots There will be as many pins 6l as there are fingers 5ft. and by referring to Fig. 7 it will be seen that fingers 54 alternate with fingers 50, so that a pin or wire 61 will lie between fingers of the type indicated at 50. The diameter of the. wires G1 may be slightly more than the thickness of fingers 5t.

By referring to Fig. l it will be seen that the right hand ends of all the fingers extend beyond the bar 3ft so as to be operatively positioned with respect to levelling device L. The under sides of both types may be concaved to form runs GEZ (see Fig. 3) to receive the pegs 33 ot the pattern mechanism. The rims are toi-mcd by flaring outwardly the lower edges ot the fingers, and in order to prevent these widened portions trom interfering with each other, and also to properly space the fingers ot the type shown in Fig. 4, I 'form the latter as shown in Figs. 7 and 9. As set forth more par tieularly in Fig. 9 each finger 5t has a double offset. the first indicated at ffl ex tending slightly to one side of the finger while the second ofl'set 04- extends an ctpial amount on the other side of the finger. Said offsets engage the parts .l ot the neighboring fingers 5f) to guide the fingers :7l and to prevent interference ot the adjacent runs (S2.

The pins (il serve. to position the dobby hooks 5f) and the latter in turn position fingers In a double index dobby there will be an even number of fingers, one half ot each type, and there will therefore be a tinger on one end ot the set with the slot 5T. In order to restrain improper lateral movement of such finger, the end peg or wire adjacent the slot 57 of the last finger 54; is made somewhat longer than the others as indicated at G5 in Fig. (i.

From the foregoing it. will be seen that I have provided dobby fingers the ends ot which are ot substantially uniform thickness and that they are made in two types, one ot which is formed to receive the guide for the other type. lt will also be seen that, all the fingers are so positioned and formed as to be in operative relatitmship with the levelling device L. Furthermore. the heavier finger of) will li'f'f the wire .52 as well as one of the hooks. whereas the relatively lighter finger 5l will be called upon to lif't the hook only. Also. the fingers are `formed with concaved flared runs and one type ofl finger is formed with ofl'set. parts which serve to position thc fingers of' that type. Furthermore there is a peg ol extra length provided to prevent lateral displacement of'A the end finger of' the type .shown in Fig. 11.

Having thus descrilicd my invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing from the spirit and .scope of' the invention. and l do not wish to be limited to the details herein dif?- closed but what I claim is:

l. ln a loom (lobby having pattern mechanism and harness actuating elements, a set ot fingers movable about a common center and operatively positioned with respect to the pattern mechanism and operatively connected to the elements, and guicl lflfl ing members interposed between rcertairrof the and located in openings extend` `pattern mechanism,` a Llevelling device for the fingers, and guide members for certain ot the lingers located inopenings extending through other of the fingers and inalignment with said other lingers, all of-said lingers projecting beyond Vthe guidemembers to be operatively positionedwith respect to the levelling'device.

In aloom dobby having pattern mechanism and harness actuating elements, a set of dobby fingers, a pivotal support` for all the'tingers adjacent to one end ofthelingers, a levelling device for all"thelingers adjacent tothe other end of said fingers, and guide iinenibers for certain of the fingers located between the pivotal support and levelling device and located in openings extending through certain other lingers so that said guiding members are in substantial alignment with said other fingers, all of said fingers extending beyond the guide members to be operatively positioned relatively to the levelling device.

4. In a loom dobbyv having pattern mechanism and harness actuating elements, a set of lingers movable about a common center and for the pattern mechanism opera-tively connected to the elements, and fixed separating members located between alternate fingers and located in openings extending through the intervening fingers, the interveiling lingers being projected beyond the separating members so that all of said lin-4 gers are of substantially the same length.

5. In a loom dobby having pattern mechanisni and harness actuating elements, a set of dobby fingers for the pattern mechanism operatively connected to the elements, and spaced guide members received by openings extending through certain of said members, said fingers formed with openings for the members also beingextended beyond the members so that all of said lingers are of substantially the same length,

6. In a loom dobby having pattern mechanism and harness actuating element-s, a set of dobbyvfingers for the pattern mechanism operatively connected to the elements, spaced guide members received by openings extending through certain of said lingers, other lingers extending beyond and being guided by said members, said fingers `formed with openings for the members also being extended beyond the members so that all of said lingers are of substantially the same length, and a levelling deviceftobe moved into engagement with Iall ofthe fingersto lhave operative `Contact with the Ilatter at points betweenthe adjacent ends of the lingers and the members. "4'. Inaloom dobby having 4pattern mechanism and yharness actuating elements,a` set of dobby fingersto cooperate with the -p'attern` i'nechanism operatively relatedto the elements, `guide members, certain of "the lfingers being formed with Islots in their under sides to receive/the members, `the other fingers being guided by the members and-all of saidfingers having'portions extending above the members, whereby the members will guide said other lingersand the latter-will guide't-he slottedmembers and all of said lingers willbe nmt-ually-guided byeach other by reason of the portions thereof vwhich extend above the members.

8. In a loom dobby having pattern-mechanism, an upperset of hooks, a lowerset of hooks, lifting rods forthe upper-set of hooks, and' a set of fingers operatively related tothe pattern mechanism, spaced` guide members 'to separate the lingers, certain of said fingers having slots extending therethrough to receive the guide members and having direct engagement with the lower set of hooks, the other fingers being between the members and having operative engagement with the lifting `rods for the upper set of hooks.

9. In a loom dobby having pattern mechanism,an upper set of hooks, a lower setof hooks, lifting rods for the upper set of hooks, and a set of fingers operatively related to the pattern mechanism, spaced guide members to separate the fingers, certain of said fingers having slots extending therethrough to re# ceive the guide members and having direct guided by and extendingl engagement with the lower set of hooks, the

other fingers being guided by the members and having operative engagement with the lifting rods for the upper set of hooks, and a pivotal support for all said lingers located between the pattern mechanism and thatportion of t-he fingers which moves to raise the hooks.

l0. A dobby linger for a loom dobby having a separating comb and having two dobby fingers spaced by the comb and restrained against lateral movement by the comb, said linger to lie between the said two fingers and having an opening extending therethrough to receive that part of the comb which spaces said lingers and having another portion thereof offset to engage and be guided by one of said two lingers.

l1. A dobby finger for a loom dobby having a separating comb and having two dobby fingers spaced by the comb and restrained against lateral movement by the therethrough to receive that part of the eomb which spaces said fingers and having another poition thereof oflset on both sides ot said (lobby finger to engage :intl be guided by saii'l two fingers.

12. A (lobby finger for a loom (lobby having a separating comb antl a pattern mechanism, said finger having a run on the bottom eflge thereof for the pattern mechanism :formed by flaring a portion ofi the 4lower edges of the finger, other parts ot' the linger being removed to receive a part ot the eomb and still other portions of the finger being offset out of the plane of the finger to Qooperate with adjacent fingers an(l acti as a guide.

13. In a loom (lobby, a set of (lobby fingere: eertain fingers having substantially plano vertical walls and certain other fingers having otl'set portions projecting beyond the surfaces thereof"l to engage the plane surt'aees ot the firsty namerl fingers to space the fingers.

let. In a loom (lobby, a set ot (lobby fingers certain fingers having substantially plane vertical Walls antl Certain other fingers having offset portions projecting beyond the surfaces thereof to engage the plane surfaces of the first namerl fingers to space the fingers. and a peg run on the uiuler side of each of the fingers formed by having a portion ol" the lower erlge ot the fingers exteinl laterally beyond the plane vertical surfaces of the fingers.

15. In a loom (lobby7 a set of.2 (lobby fingers, a separating eomb having a plurality of spaced separating members for the fingers7 alternate fingers having portions thereof removed to receive tho separating members` of the eomb and the intermediate fingers having portions thereof to engage the members, said fingers being arrangeil in pairs so that; the eu(l finger at one side of the sett is provi(le(l with an opening. anrl an additional member forming a part ot the comb to (-ngage and restrain lateral movement off the said eu(l finger.

In testimony whereof I have hereunto afiixetl my signature.

ILBRIDGE R. HOLMES.

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