US2533128A - Loom frame - Google Patents

Description

Dec. 5, 1950 R. G. MALLARD ET AL 2,533,123

LOOM FRAME Filed Aug. 17, 1946 e Sheegs-Sheet, 1

lvwea'ziofl: 1:05am GMALLARD EVERETT H. ASHTON y Mfg? hm Dec. 1950 R G. MALLAFIQD ET AL ,53

LOOM FRAME v Filed Aug. 17, 1946 6 Sheets-Sheet 2 Inwnior: nosanr a. MALLARD EVERETT H.ASHTON Z J j ibrney Dec. 5, 1950 R. a. MALLARD ET AL LOOM FRAME Filed Aug. 17, 1946 6 Sheets-Sheet 3 Imnior: ROBERT G. MALLARD I EVERETT H. ASHTON 5, 1950 R. G. MALLARD ET AL 3 L0 OM FRAME I Filed Aug. 17, 1946 .6 Sheets-Sheet 5 Inwniwn' ROBERT 3. MALLARD E VE.RE.TT H. ASHTON Dec. 5, 1950 R, a, MALLARD ET AL 2,533,128

LOOM FRAME Filed Aug. 17, 1946 v 6 Sheets-Sheet 6 fnuenlol" ROBERT E. MALLARD EVERETT H. ASHTON ateaia 3 loom nearest to the operator. For example, the cloth roll it is mounted in the forward portion of the loom and the warp beam Ill is mounted at the rear of the loom.

The novel side frames i8 and 2% are identical in shape but are necessarily provided with different shaped openings for receiving the various operat ing mechanisms. The left-hand side frame I8 comprises two spaced parallel vertical webs 26, 28. These webs are connected by suitable plates which are located in predetermined vertical and horizontal positions as will later be described.

Before proceeding to a detailed description of the novel side frames I8 and 20, the general organization of the present loom and its main operating mechanisms will be described. The double web side frames I8, 26 of the present machine are provided with openings surrounded by pads 34, 35 respectively on which suitable bearings for a crank shaft 38 are secured. The crank shaft 38 is the only operating element between the warp beam It and the take-up mechanism 24 which extends across the entire width of the machine. Thus, the space below the shaft 38 and between the warp beam IB and the take-up cloth roll It is clear of any obstructions which would prevent proper positioning of harness operating mechanism. The crank shaft 38 at its right hand and is provided with a clutch assembly 44 and is driven by a belt 46 from a suitable source of power, such as an electric motor 48. The clutch assembly 4 is supported on a suitable bearing 5i mounted in a bracket 59 which is secured tothe outer web of the right hand loom frame 20.

A crank 52 is provided adjacent the right hand end of the crank shaft 38 and positioned between the vertical webs 5d and 56 of the side frame 20 as shown in Fig. 8, a similar crank, not shown, is provided adjacent the right hand end of the crank shaft 38 and is positioned between the vertical webs 25 and 28 of the side frame I8. Suitable bearings are supported in openings 58 and 60 of the left hand frame I8 and openings 62 and 64 formed in the right hand frame 20. The crank shaft is thus rigidly supported and flexing of the shaft 38 is reduced to a minimum. The right hand end of the shaft 38 is provided with a spur gear 65 which meshes with a gear 68 fixed to a cam shaft iii supported in bearings 12 and I4 fixed in openings 76 and E8 in the inner and outer webs 56 and 54, respectively. The cam shaft I0 is connected to suitable harness operating mechanism by suitable spur gears.

The other end of the crank shaft 38 is provided with a spur gear 86 which meshes with a spur gear 82 fixed to a cam shaft 84 journaled in suitable bearings supported in alined openings in the inner and outer webs 28 and 26 of the left hand side frame I8. The inner end of the shaft 84 has fixed thereto a bevel gear 85 which meshes with and drives a second bevel gear 88 fixed to the rearward end of a horizontal shaft 92. Atits forward end, the shaft 92 is connected by a suitable coupling to the take-up mechanism 24 contained within an enclosing casing 96.

The cranks 52 are connected to the swords III) by suitable connecting rods. The lay I4 carries at each end a suitable shuttle box I02 into and out of which a shuttle I94 is picked during operation of the loom. The shuttle boxes I62 are provided with shuttle checking devices of any suitable construction. The bottom of each shuttle box is slotted to receive the upper end of a picker stick IE6 having fixed to its upper end a picker I08 arranged to engage the tip of the shuttle I04.

The lay M extends entirely across the loom and is supported adjacent to each end by swords III) which are pivoted on stub shafts II2 rotatably mounted in suitable bearings I M and I I6 mounted on the inner and outer webs of each of the side frames i8 and 20. Thus, as the crank shaft 38 is rotated during operation of the loom, the lay I4 is reciprocated forwardly and rearwardly of the loom. A reed i It is carried by upwardly extending projections on each of the swords I it] and acts at the end portion of the forward reciprocation of the lay to beat up the filling carried across the loom by the shuttle I04.

The lower end of each picker stick I06 is fixed to a parallel I20 which rocks on a parallel shoe I22 fixed to the outer end of each stub shaft I I2. The lower surface of each of the parallels I20 is provided with a cam surface which is designed to cause the picker I08 on each picker stick I05 to travel in straight line parallel to the bottom of each of said shuttle boxes I02. Each parallel shoe i22'is provided with generally vertical frames I24 which are provided with surfaces arranged to prevent jumping of the picker stick IE8 at each end of its rocking movement.

Each picker stick IE6 is operated alternately to pick the shuttle I04 across the loom. The cam shaft :9 on the right hand side of the loom has fixed thereto a usual pick cam I26 having a pick toe I2? thereon. The cam I26 operates a bellcrank I29 having a depending arm I3I which is swung in a clock-wise direction in its picking movement. The arm I3l carries thereon a usual lug strap I28 having a looped portion embracing the picker stick I36. Movement of the arm I3I is transmitted through the lug strap I28 to the picker stick me which in turn rocks on the parallel shoe I22 and transmits its motion to the shuttle iii. The shuttle is thus thrown across the lay and into the other shuttle box where it is checked by the usual picker and shuttle checking mechanism. A similar pick motion operated from a pick cam, not shown, on the shaft 34 is at the left side of the loom.

The inner web of each side frame I8 and 20 is provided with a downwardly and forwardly curved slot I36 for receiving the end gudgeons of a warp beam shaft I32. The shaft I32 thus seats itself in the forward end of each slot I30 and is locked in such position by any suitable means. The warp beam I8 is provided with suitable beam ends 534, I36 between which the warp threads I38 are wound on the beam. The left hand end I34 of the beam is provided with a gear I39 which meshes with a spur gear I40 of the let-01f mechanism 22 which controls the rotation of the .Warp beam II! and permits warp to be uniformly let-oft therefrom. The let-off mechanism may be of any well-known type but preferably is a so-called uniform tension friction let-off wherein the warp beam If! rotates to let-off the warp when the tension thereon exceeds a predetermined amount. The let-off friction is controlled by the diameter of the warp to compensate for changes of diameter thereof. 7

The take-up mechanism 24 as hereinbefore stated is enclosed in the casing 96 to permit ready removal thereof from the loom for repair and replacement.

The'present loom is provided with a hopper stand 544 mounted on the right-hand frame 20 and carries a supply of filling bobbins I45 which are automatically inserted into the shuttle I04 to replace a bobbin on which the filling yarn is exhausted. This automatic bobbin changing pad eats-agree banis "(not shown} may bei of -the' type used resent -coirin ercial-lc oms but it is evident'that bo'bbh; supply means could -be used if so The oom i 'also providedwithsuitable'manual and 'utom aftic stopping 1 means but these are not herein sincethey form no part of the presm'ear i s for-rigidly supporting the let-off mecha- 2 2 and -the take up mechanism 24. The

mg" 2 or'the'let-ofl mechanism-is with "a fia'nge i Mil-which is seated on a welded to and surrounding an opening f the gii'teriframe member 26 of the t and -side frame jt. The casing I42 is provided" with an-inwardly-"extending boss I54 having a suitable bearing therein in which a projecting t in s shaft :56 is journaled. Theboss I54 fits into an 7 opening I58 formedin the inner web 26 and :which a-scondJinwardly-extending boss I62 carrying a ".i

shaft I64 which eigtend svthrough an opening I68 in the inner web 28. The inner end of the shaft IQ carries a generallyfupwardly eXtendingLarm,

notshown, which engagesthe'warp on'th warp beam and controls the operation of the let-off mechanism as is usual in constant tension letoffs. With the construction described just above, the let-off may be removed as a unit and another let-off substituted therefor with a minimum loss of time. the forward portion of the left hand side frame I8. The take-up 24 is mounted in a casing 96 having a flange I18 arranged to seat on a pad welded about the margin of an opening in the outer web 26. The inner web 28 is provided with an opening I16 which receives a projection N8 of the casing and which carries therein bearings in which the rearwardly extending shaft 92 is mounted. The casing 96 is secured in position by suitable cap screws I38. After these cap screws have been inserted the coupling adapted to connect the forward end of the shaft 92 to the takeup mechanism 24 within casing 96 is fixed in position and tightened to provide an operative connection between the shaft 92 and the take-up mechanism 24.

It is to be noted that the side frame I8 is provided with a plurality of vertical and horizontal bracing plates. These plates not only stiffen the frame but prevent any slight bending of the webs at points Where substantial strain is applied to the webs.

Referring now particularly to Figs. 4 and 5, the webs 26 and 28 are secured together by top and bottom plates I82 and I34, respectively. The lower spacing plates I84 are located between the webs 26, 28 and are welded in position. The upper spacing plates I82 are seated along spaced portions at the top of the webs and are likewise similarly welded in position. These plates I82, I84 are positioned that convenient access may be had to parts interposed between the webs 26, 28.

A horizontal reinforcing or bracing plate I86 is fixed in position to support the take-up casing as it is bein Placed in position and also acts to The take-up '24 is similarly mounted in take up any bendlngmoments to-which -the -trame '18 may be subjected by reason of the "operation of the take-up mechanism. 'A' verticalfliraelng plate I86 is welde'd 'between the "WebS Z-BEZB -.=an l further reinforces and braces the frame against slight bending-or buckling.

The frame I8 is subjected to substantial strain by the let-oif'mechanism'fiand this is minimized 'by'a horizontal-plate I90 welded in position-dietween the webs 265-28 just above -the opening I 52 intowhich the let-off casing I4-2-is'inser'ted. A substantially'vertical plate I92 is 'po'sitioned just forwardly of the'opening I52. The lower plates 58s adjacent tothe opening I 52 are efiectivetalso to stiffen and brace the frame I8. 'The 'frame '29 is also provided with similar spacingand bracing plates which are likewise welded in position.

The frames I8, 20 are preferably provided with a plurality of pads surrounding the various openings in the frames. These pads, however, are-not essential in'all cases since it isevidentthatbearings could be secured directly to the --webs, if :so desired. The pads surrounding openings for receiving the take-up andlete-olf mechanismsfhowever, are preferablyprovided since the webs may not be sufiiciently thick to be satisfactorily threadedto receive the cap screws.

:The outer web 5-2 oftheright'hand-side'frame 28 is provided with an opening l94 for-rreceiving the motor 68. The motor 48 is mounted one; pivoted. support I as which is supported on aborizontal rod I98 fixed =to the webs 54, 56. "The motor .48 is normally supported by the belts- 46 nut provision is made-to enable theseibelts to be tightened as may be necessary. A bolt 208 pivoted to the outer web 54 at 282 extends through an opening in the support I96. Nuts 204 are threaded in the portion of the bolt 200 located above the support I96 and when tightened thereagainst serve to increase the tension on the belts 46. I

As shown in detail in Fig. 8, the crank shaft 38 is mounted in bearings 286, 208 which are secured to the pads 34, 36, respectively, by bolts 2 I 0, 2 I2. Bearings for the other rotating or reciprocating parts of the loom are similarly mounted but are not shown or described in detail since the specific bearings and securing means therefor form no part of the present invention.

It is apparent that the size and location of the openings, spacers, and bracing plates may be varied as desired. It is also evident that pads about the openings may 'be eliminated, if so desired.

The parts of the present loom frame have been described in detail but it is believed that a clearer understanding of the invention will be gained by summarizing briefly the advantages gained thereby. The elimination of long shafts extending entirely across the loom permits better and more 'emcient positioning of many of the loom mechanisms and has the further. and striking advantage that the dimensions of the loom may be decreased from front to back to maintain a short warp line. This is of substantial importance since it reduces substantially wear on the warp and hence reduces to a large extent stopping of the loom as a result of warp breakage. The decreased depth of the loom is made possible by the absence of interfering mechanisms which have heretofore prevented the warp beam from being mounted nearer the breast beam.

Another important advantage obtained is the elimination of vibration as a result of closely spaced bearings for reciprocating mechanisms such for example, as the lay, whereby the use of long heavy shafts is avoided. This also permits the use of lighter parts which decreases substantially the inertia of various mechanisms. Vibration is reducedthrough the use of lighter parts and through the use of better and more closely spaced bearings.

. Having thus described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. In a loom, a side frame, said side frame comprising a, pair of spaced substantially vertical webs adapted to support operating loom parts, spacing means attached to the edges of said webs uniting said webs into a unitary structure, one of said webshaving an opening therein for passage as a unit into the space between said webs of a loom mechanism including one or more elements adapted to operatively connect said mechanism to loom components positioned on the outside of theother web, means adjacent said opening for connecting said mechanism as a unit to said one web, said other; WQbhaving one or more holes therein permitting passage of said one or more elements therethrough when said mechanism is properly positioned ;relative to said loom components, said one or more holes serving as positioning means for said mechanism during :the installation thereof, and stress distributing members spanning the space between said webs positioned proximate said opening and united to each of said webs to reinforce said webs and acting to distribute the stress loading of said side frame due to loom operation to both of said webs.

2. In a loom, opposed side frames therefor. each comprising a pair of substantially vertical plate members, connecting means spacingsaid vertical plate members to form an integral structure, a warp beam mounted between said opposed side frames, let ofi mechanism for controlling the rotation of said warp beam during the operation of the loom mounted on one of said vertical plate members of one side frame, said one of said vertical plate members having an opening for receiving said let off mechanism, the other plate member of the said one side frame having an opening for positioning said let off mechanism in operating relation relative to said warp beam, said connecting means including plate members adjacent said first named opening to prevent flexing of the said vertical plate members and to distribute between the said vertical plate members the stresses caused by operation of the loom.

ROBERT G. MAILARD. EVERETT H. ASHTON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,551,746 Jenckes Sept. 1, 1925 1,911,981 Wiget May 30, 1933 FOREIGN PATENTS Number Country Date I 354,884 Great Britain Aug. 20,1931

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