US1371564A - Loom-dobby - Google Patents

Description

F. LEEMING.

LO0M BOBBY.

Armclmnn mso fu. l5. 19|?.

1,371,564. Patenwd Mar. 15, 1921.

5 SHEETS-SHEET l.

p11' j WK F. LEEMING.

LOOM DOBBVY.

APPLICATION H1111 ma. 15, 1917.

m6111611 Mar. 15,1921.

5 SHEETS-SHEET 2.

F. LEER/HNE.

LOOM DOBBY. APPLICATION FILED FEB.15.|9H.

Paenfe Mar. E59 @EL 5 SHEETS-SHEET 3- F. nimma. [00M BOBBY.

APPLICATION FILED ill. I5, 19|?.

131mm nr. 15, 1921.

5 SHEETS-SHEET 4.

F. LEEMING.

v Loon oosav. APPLIFATIOI HLD FEI. 15| 19|]- Patented 1hr. 15, 1921.

5 SHEETS-SHEET 5.

sov

UNITED STATES 'P'IEINI'If OFFICE.

FRANK LEEMING, or GUISELEY, NEAR LEEDS, ENGLAND.

LOOM-BOBBY.

To cH w/Lcm it lmay concern Be it known that l, F RANK LnEMiNG, a subject ot the King o'l Great Britain, and resident or' Guiseley, near Leeds, in the county oi York, England, have invented Ya certain new and useful Improvement inV LooniDobbies, oi which the following description, having reference to the accompanying sheets of drawings, is a specifica tion.

My invention relates to dobbies wherein toothed crankwheels are made use ot for transmitting motion to the healds or heddles in looms 'for weaving. Heretoiore these toothed crank wheelshave usually been arranged with their operating part and. connections thereto, so that their change of psition has been eitected by the pattern surfaceY mechanism moving said toothed crank wheels into ge `r with their operating partly toothed barrels. ln such cases, therefore the said movei'nents of the crank wheels b v the pattern surface have had to be effected while yet said toothed crank wheels were sustaining the weight of the healds and warp threads which they had to operate, hence said weight of the healds and warp threads and' other forces acting thereon had a detrimental eiect upon the pattern surieaccwhjich controls and moves their said operating crank wheels as is well known.

To overcome this objectionable feature it has been proposed to arrange said crank wheels to rotate about iiXed centers and in my invention I use this arrangement and I provide improved devices for controlling and carrying out the rotary motions or" said crank wheels. No weight of warp or healds or any Vtorce in connection therewith in any way interferes with the tree movement of the patternvsurtace mechanism which controls the actions ot said crank wheels.

ln order that my said invention may be eadily understood, I have hereunto appended sheets of drawings illustrative thereot to which by figures and letters, reference is ma de in the following description VFigure i is a back elevation oi dobbyv mechanism produced in accordance with my invention.

Fig. 2 is a back sectional elevation of the partsillustrated by Fig. 1.

Fig. 3 is a sectional end elevation as seen in the' direction indicated by the arrow c and as taken on line A-B of Fig.-2.

Fig. 4 is a sectional front Velevation of a Specification of Lettcrsratent.

Application led February 15, 1917. Seria]y No.l 148,848.

lever actuated by the pattern surface mechA anisin the same being shown iny detail and hereinafter more particularly described.

F 1g. 5 is a front elevation of a partly toothed wheel and parts in connection therewith mounted within and operated bv the lever shown by Fig. 4. Engaging with said partly toothed wheel is illustrated a partlytoothed crank Wheel.

Fig. 6 is a sectional end elevation oiI the partly toothed wheel and crank Wheel shown by Fig. 5.

igs. 7 and 8 are sectional end elevations taken on Vline 'C D of portions of the lever illustrated by Fig. 4 and as seen'in opposite directions in order to illustrate inclined formations made edgewise in said levers tor the purposes hereinafter described.

Fig.v 9 illustrates parts in detail hereinafter explained.

Fig. 1,0 is an elevation of the front jack lever and the several parts operating in connection with it, while Fig. l1 is a similar elevation of the next jack lever behind it alsowith the several parts in connection with it. In both cases the framework is omitted for thel sake of clearness.

ll indicates the framesides of a dobby and F a portion of the framework of a loom upon which said dobby mechanism is mounted.

The type ot' dobby mechanism to which my invention relates is the one in which toothed crank wheels are made use of for operating the jack levers.

In the usual mechanism these crank wheels are operated by continuously rotating partly toothed drums, however instead of making use oi' said partly toothed drums I make use oi" the devices hereinafter fully described.

The jack levers 2 and 2c in the dobby are, as in the ordinary manner) pivoted upon a cross shaft fr which extends from one trameside to the other frameside E of said dobby. These jack levers 2, 2a are connected in al tornate positions to the toothed crank wheels 4f. and la in such order that the series oi' crank wheels 4 are connected to the vertical arms 26 of the levers 2 by their connecting rods 3 while the crank wheels 4c are connected to the horizontal arms 2c of the levers 2a by the connecting rods 3a. The shape or formation of the curved parts on the levers 2 and 2a Where the pivotal connections'tor their respective rods 3 and 3a i dobbies.

.are situated, is asishown by Fil. 2 So that the extending parts 2d andA 2c-respectvely may cover said pivotal connections 1n position as is Well known to'themakers of The arrangement of the crank Wheels 4 and ta to occupy alternate position is made use of ink order: to .give space Vfor the altered or new construction of operating-devices for the crank Wheels 4 and la While yet keeping all of the said operating devices Within the Width of the series'of jack levers 2 and 2a, that is to say, by placing the two sets of crank 'Wheels 4', la in the two'positions described lhave in each case the full Width of two levers 2, 2a in which to place the operating devices for the crank .Wheels l' and in like manner l can again vhave tivo sets of operating devices for the crank Wheels 4a thus the Width or pitch of the jacirlevers 2, 2a is not increased by the y employment of my .improved mechanism, but said Width is kept Within the Width of the healds that the jack levers have to opcrate as though the ordinary devices were employed for operating said crank Whg-:elsV 14C and 4ta,

Y ln cases Where the width ofthe healds is not limited, then only one set of crank wheels maybe .used for Yoperating,the jack levers veach of which in such circumstances mightbe equal in Width 'to the full width of its operatiiigfcrank Wheel and the parts which :rotate saidcrank Wheel.

is is Well known in dobby mechanism of this type, as heretofore constructed, it is usual to make use of partly toothed drums lfor operating the toothed crank Wheels, said partly toothed drums being rotated convtinuously during the movements of the Vdobby mechanism. In place of these drums I noivy make use of the continuously rotating` cross shafts 10, lOwWhich have mounted upon them the series -of partly toothed These piece c which is mounted upon a hub extending laterally therefrom. The series of partly toothed wheels l2. 12a are arranged to slide longitudinally over their V respective shafts 10,100; but have the Icontinuous motion of said shafts 10, a transmitted to them by means of thekeys 11 l and 11a which are secured to said shafts vThe-series of crank wheels 4, #la are respectively mountedupon studs 5, 5a car-V ried byzappropriate brackets 6, 6a, so that they may revolve freely upon vsaid vstuds 5, '5a when actuated by their respective partly toothed Wheels 12 and 12a. brackets 6, 6a are mounted upon thesupporting shafts 7, '70, which Yeitend from the ,frame side E Von one side of the dobby toVV that on the other in order to support said brackets 6, 6a,I While the extending and the Yforked ends g, g1 ofthe bracket 6, 6a respec-tively enter supporting grids 8 and` Sa which retain tliein in their -proper positions laterally. rllie .adjustable cross shafts or bars 9, 9a. are employed to secure and support the brackets 6, 6a in` position relatively with their operating partly-toothed-wheels 12 and'12a. Y Y A y .iis hereinbefoi'e stated each partly toothed The K wheel 12 and 12a has its respective annular V'piece o' mounted upon 'a hub Z7 (see 6)V which is formed laterally V upon each of said' Wheels 12, v12a and this annular piecey 0` is retained in position thereon by a flange lixed on .the outer end of the hub fisso "that While the wheel 12 taking Within said annular piece mayV freely rotate therein it may yet have motion transmitted to it its annular vpiece c to cause it tomove longitudinally over its shaft `10 or10a. Y

l Each of the, annular pieces c has pins or projection 7, f1 extending radially or diametrically from it (as shown by Fig 5) so thatthey (said pins f, f1) lmay take'into slots g; g1 formed in` theirrespective vlever 14 or lef-.(11, While the outer edges o1, c? of. the annular pieces c are curved as shoivnby in order to take against the curved surfaces 7c, 761 formed in each ,of the aforesaid levers 14.- and 14a as shown by Fig. 4. VThe fitting of these surfaces c1, o2 against the surfaces 79,]c1'lis to permitfreedom of inotion for tlielevers 14, lll@ Whilel yet holding Ythe annular pieces @against rotation.

Ais Ywill be observed the slots g, g1 are of the inclined formation illustrated by Figs. 7 andS 'in order that-the actionsfof said ist` lll)

inclines as the lever 14er 14a upon `which they are formed is being raised or lowered, that is to say is being moved radially about its respective shaft 10 or 10a) KVWill have the effect of causing the pins 7, f1 to move in a,

direction longitudinally over the shaft 10, 10a thus the said actions will 'transmit inotion in. a lateral direction to 'the partly toothed Wheels 12 and 12a. Y

This lateral `motion of the Wheels `12 and 12a takes them into and out of gear (as the case may` be) With their respective crank Wheels and la in order to transmit motion thereto or to leave same inoperative as-may be desired and as is controlled by the pattern surface mechanism.

The two series of levers 14 and '14a Vwhich actuate the annular pieces c are shaped in the two forms illustrated by Fig. 2, so that the pattern surface mechanism may act thereon causing said lever 11ior 14a to rise or fall as the case may be and as is well understood. The rising movement of the levers le or 14a is arranged to have the eliect vof sliding their partly toothed wheels 12 or 12a npon their respective shafts to cause them to engage with its respective crank wheel e or la thereby giving motion to its jack levers and their respective healds vin manner well known. This risingmovement of the levers it and 14a is preferably employed 'for putting the partly t othed wheels into eiiective operation with their crank wheels, since by this arrangement a bowl 15a; (or if peg-lags are employed then a peg inthe lag) on the pattern surface mechanism 15 will indicate to bring about a movement of the lieald either causing said lieald to rise or to descend from its raised position as the casemay be. By this arrangement it is always remembered that to give motion tol any heald at any time, a bowl (or a peg) must beV placed in the pattern surface to effect this, whereas when the heald has to remainv stationary then its pattern surface is blank or Vhas no bowl (or The toothed crank Vwheels et, 4a have certain parts of their peripheries my (see Fig. formed to tit upon or take against the toothless parts n of thepartly toothed wheels 12 or 12u'l so that on eachl engagement of these teeth with the teeth on the crank wheels e or la these are rotated through half a revolution and are then arrested and held `troni further movement by thus fitting` against the said toothless parts of the wheels 17 or 12a. The crank pins y) whenv their wheels et or c are thus` stationary are arranged so that the Jr'orces acting through their connectingrods 3, 3a do so in a direct line through the 'center ot the crank wheel thus said forces are withstood by thev axial studs of the crank wheels Ll or 4a on account o'i their dead center positions. Y

lllhen the partly toothed wheels 12 or 12a are moved'laterally out of gear with their` crank wheels Lt or eta then the annular pieces c are broughtinto position so that the parts m on Vsaid crank wheels et or la may take Vagainst the properly curved or seinicylindrical partormed upon said annular pieces c thereby to be held against rotation as they are whenl in contact with the toothless l/l ot their operating wheels 12, 12a.

Vi`he cross shafts 9`r 90, are held in position by springs when it is desired to have such means :it release in order that should the partly toothed crank wheels not properly engage with their partly toothed driving wheels then said springs yield to prevent breakages. As such yielding spring devices pa rts are not absolutely necessary they are not illustrated by the drawings.

To permit the jack levers 2, 2a to be readily detached or removed from position in the machine. their pivotal openings are made to `span their shaft 'r upon which they are mounted and upon which they are retained by the cross bar s in manner well known. The said jack levers Cl are also guided in their pat-hsl by their vertical and horizontal arms respectively taking through the grids or guiding parts t, 151.

The leve-rs 14, 1de are niade to span their pivotal shaft /i upon which they are mount ed so that by turning the holding bar u. out ol the position shown by Fig. 2 into a position beneath .the sha-ft i any one or all of said levers 14, 14a may be freely removed trom the machine.

is means for enablingr the healds to be brought to a central position 1 make use of levers 19 and 19av which are pivoted upon the cross bar 7L so that I may mount upon lateral arms extending from said levers 19, 19a other cross bars 20, 20a which will take beneath thetwo series of levers '14. 1hry respectively in order that when the hand lever 21 (which extends from the front to about a central position in the loom) is operated bythe weaver it would cause the levers 1Q. 19a to rise by being coupled thereto through the medium of the connecting rod 22 and across shaft 213 which extends between saial levers 19, 19a (which are situated at the back and front or' the machine) thus when said bars 20, a are raised the series ol? partly toothed wheels 12 and 12a will be moved laterally and will be caused to engage with their respective crank wheels Ll and l-(f,

When the wheels l2, 12a and al, la are thus brought into gear, the weaver will throw out ot gear the well known clutch which couples the vertical driving shaft 24 to the motor shaft of the loom. at which time all the rotary parts ont the machine, including` the vertical shaft 251, are free to be rotated by hand. To enable vthe weaver `to manually rotate said rotary parts a hand-wheel ot' well known formation and therefore not shown in the drawings) is lixed upon the l'ront outer end otV the shaft 10a. hence when said hand wheel is rotated by the weaver all the crank wheels are also rotated and on these latter heine` turned a quarter of a revolution all the threads oit warp are brought to a central position. c

The pattern barrel l5 has intermittent ro tary motion transmitted to it from the shaft l0/zy through the medium of the wheel 27av and the wheel 28 which latter is mounted to revolve loosely upon the end of the. fixed shatt- Ta. To the rear of this wheel is fixed a partly toothed wheel 29 (see Fig. Q) which. is arranged to transmit motion to a wheel 30 mounted upon the shaft 157) ot the pattern barrel 15. This Wheel 30 has certain ot its teeth at il; made shorter than the others so that when brought into the position shown by Fi. 9 `the two teeth adjoining one orotherl ot' thev short teeth w will come into contact with the toothless part .frV ipon the partly toothed ivhecl 29 by which means as the wheel 29 rotates it transmits intermittent motion to the Wheel 30 and vafter such motion locks saidjvvheel in position will be understood. l

The pattern barrel 15- is mounted upon the arms f levers 31 and 31a which are also loosel'g.Y mounted upon the fixed shaft 7a, in order that by the connecting rods 32 Vat thev lower ends of said levers 31 taking through openings in iXed projections y/ extending from the framework E a spring 33 may he mounted on each tov yield providedtor any cause it is desirable that the pattern barrel should move away from the levers 14j 14a rather than causeY damages thereto or ,to other parts. i

The adjustingV of the tension of the springsk 33 is eiected by the nut da-While thev adjustment of the position oi' the pattern barrel 15 is effectedl by the nut 35.

Since dobby mechanism constructed as 's hereinbctore described is of a substantial `character and occupies comparatively little i space, portions of saine may be made use of to carry out the movements ot change shuttle boxes as Will be understood.

Such lbeing the nature and objectot in v 'Said invention what I cla1m,is:-

1. ln a loom dobby, jack levers, a support v for saidV jack levers, toothed-crank-ivheels, -connecting rods,v mounted upon said jack levers7 to connect same to said toothed-crankv Wheels, brackets for supporting said toothedcrank-Wheels, partly toothed Wheels engagingwith said toothed crank-wheels, shafts upon which said partly-toothed Wheels are splined, annular pieces mounted upon the hubs of said partly toothed wheels, levers having inclined slots to receive projections extending from said annular pieces and patternvsuriace mechanism tor operating saidV levers. y f 2. In a loom dobby, jack levers,A a support for said jack levers,- toothed crank- Wheels, horizontally disposed connecting rods coupled to the vertical arms of certain of said jack levers and vertically disposed connecting rods coupled to the hori- VZoiital arms of the other jack levers, two series of toothed crank wheels one series having the horizontally disposed connecting rods coupled to them While the otherseries have the vertically disposed connecting rods connectingrod device coupled to them, partly toothed Wheels tor engagement `With said crank Wheels, rotary shafts upon which lsaid partly toothed Wheels are mounted,` means ior moving said partly toothed Wheels longitudinally over said shafts and means for controlling said movements. Y l

3. lnia loom ,dobby,` jack levers, a sup'- port for said jack levers, toothed kcrank Wheels-connecting rods mounted upon said jack levers to connect same to said toothed crank Wheels, a separate lined support toi)V each otsaid toothed crank Wheels;partlyY toothed Wheels vfor engaging with said toothedcrank Wheels, shafts tor supporting and rotating said partly toothed Wheels, annular pieces mounted upon the hubs olf sai` partly toothed Wheels, levers having inclined slots to receive vprojections extending Afrom said annular pieces, Y andwpattern surfaceI mechanism for operating said levers.

4. ln a loom dobbyyjack levers7 a support for said jack levers. toothed crank Wheels, connecting` rods tor lcoupling said jack levers to said toothed craifikwheels` lined supports n for "said toothed crank Wheels, partly toothedivheelsfor engaging with said toothed crank Wheels, said toothed crank Wheels having hubs or parts adjoining them which Will engage with the toothed crank Wheels `to hold same against rota- Y tion, shafts upon which said partly-toothed Wheels, are splined, annular .pieces mounted upon thehubs of said partly toothed Wheels,

levers having inclined slots to receive projack levers, a sup-V shafts upon whichl said partly toothed- Wheels are splined7 annular rpieces mounted lltl uponthe hubs of said partly toothed Wheels. l

levers having inclined slots to receive projections extending froingsaid annular 'piecesy cross bars tor engaging Vthe levers which have inclined slots,=levers uponivhich said cross bars are mounted and a Vhand `lever and` s for .operating said levers. Y

FRANK

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