US1766903A - Chain guard for narrow-ware looms - Google Patents

Description

June 24, 1930.

F..y a. HoLMEs CHAIN GUARD FOR NARROW WARE LOOMS Filed Sept. 12, 1929 'A TTUH/VEY Patented June 24, 1930 ELBRIDGE R. HOLMES, or WORCESTER, MASSACHUSETTS,,Assrenort To oRoMPToN e;

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MASSACHUSETTS rlhis invention relates to improvementsin chain guards Aforlthe shuttle motions of nar-4 row ware looms and it is the general object of the invention to provide a guard so constructed as topermit the use ofvarying lengths of lays and also to accommodate lays of diiferent heights.

In lcertain types of narrow ware looms the rack rod which movestheshuttle actuating pinions is drivenl by a4 chain, andit is desirable to protect theweaver at the point-s Where .the chain` meets its sprockets. o Depending upon t-he length of the shuttle employed the laywill extend more or less beyond the loomside and it; is an-.important object of my present invention to `provide a telescoping guardwhich is extensible to provide for varyingA amounts of overhang of the lay. y `Under some conditions it is desirable to aise or lower the lay depending upon the character of the cloth being woven, the lower sprocket for the chain remaining in fixed position, and it is a still further object of my present invention to provide for these adjustments by em loying an extensible guard.

Vith these anc other objects in view which will appear as the description proceeds, my rinvention resides in the combination and arg rangement of parts hereinafter described and `set forth in the claims.`

In the accompanying drawings wherein a convenient embodiment of my invention is set forth, Y v y Fig. 1 is a front elevation of one endA of a loom having my-invention applied thereto, certain parts being insection, 1 r

Fig. 2 Vis a vertical section Von line 2&2 of Fig. 1 lookingin the direction of the arrows, 1 v Fig. 3 is a vertical section `on line 3-3 of Fig. 2, the chain and sprocketstherefor being indicated in dot and dash lines,

Fig. 4 is an enlarged detail end elevation looking in the direction ofvarrow 4:,Fig. 1, Fig. 5 is a horizontal section on angenlarged scale on line 5 5 of Fig. `3, A

Fig. 6 is an end elevation looking -in the direction of arrow 6, Fig. l showing the 32 bolted-to a metallic .11.

MAssACHUsET'rs, A oonro-1ar1'rion,olil

CHAIN GUARD Foa Nannonna/"AREv Looms`v Application filed. September 12,: 1.929. `Serial 1Y0/392,225.

manner, of supporting the Vlower end of the laysw'ord, and Fig. 7 is al detail top plan yview taken in the direction of arrow7, Figcl. E Y VReferring to Fig. 1, I have shown the loomsidel() and a lay ll'vvhich is mounted on swords one of which is indicated atI l2. The llay sword has a lug 13 as shown in Fig. 6throughwhich is vertically threaded a stopbolt 14. The head of the latter engages the top of a foot 15 which is mounted on a hollow rocker shaft 1,6. Bolts 17 passingthrough slots 18 holdv thesword 12 to the foot 15and by loosening the, bolt 17 and varying` the position of the bolt `14 the vertical locationof-the lay' may be varied; The rocker shaft 16 moves'in a bearinglt) which is fixedtothe loomframe.-

A rackf20is slidable longitudinally 'in` a slot 2lfin the upper surface of the lay, and meshes 'with y pinions 22 which operate through devices not shown to cause reciprocation of theshuttles not shown. A chain 23 is lattached to the rack and passes around a sprocket 24 `mountedfor rotation on ay stud k.25,fixed with respect Ito the lay. The chain `extends downwardly and around .a sprocket 26 which ymoves. freelyaround a fixed stud .27. -The chainpasses 'through the hollow vshaft 16 and isconnected to an actuating rod 28.. .The `stud 27 1is carried by a forked bearingfmember 29Ywhich is held in adj usted angular and longitudinal position' on the hollOWrShaft by aclamp nut 30. -1

v 1n similarmannerl the stud-25 is held by a bracket31 which is forked and has a root section 33 ofthe lay During operation ofthe loom the lay moves back Vand forth aroundthe 4axis of the shaft 16as .a pivot by-a mechanismV not shown,

and the rack bar20 Ireciprocates,moving the shuttles iirst in one' direction-through the shed'of the web and thenv in the opposite 9 far described is of common construction,

being substantially the same as that set forth The bracketcan assume different positions transversely of the lay.

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in my prior Patent No. 1,462,549 to which reference may be had for a more complete understanding of the shuttle motion. For the purposes of the present description it is sufficient, it is believed, to set forth one sprocket on the stud 27, although in practice l may employ more than one.

My present invention aims to provide a guard vor protector for the chain which operates the shuttle rack, and in carrying my 1nvention into effect I secure a small stand to the metallic section 33 of the lay by means of a bolt 41 which extends through a slot 42 lying transversely of the lay. A pivot pin 43 carried by the stand 40 passes through the side plate 44 of an upper shield member 45 which is substantially U-shaped in horizontal cross section, as shown in Fig. 5. The member 45 is, therefore, pivotally mounted with respect to the lay and can swing to assume any one of a number of positions under the lay.

The lower part or member of the guard is formed of a pair of substantially similar elements 46 and 47 which, as viewed in Fig. 2,

lie respectively-to the right and left of the chain sprocket 26. Each member has at the upturned end thereof an ear 48 through which passes a clamping bolt 49 held in position by a nut 50. As shown particularly in Fig. 5 each element is provided with a substantially vertical wall 51 and a side plate 52 which has near the upper end thereof a short retaining rib 53. The distance between the v wall 51 and the rib 53'is substantially the same as the width of one of the Walls 44 of the shield member 45. The elements 46 and 47 are made of opposite hand so that when assembled with their upper ends held together by means of the bolt 49 the side plates 52 will be clamped against the walls 44 and the lower portion of the shield member will be held in position by the ribs 53.

The lower part of each of the members 46 vand 47 is bell-shaped as indicated at 54 to provide a hollow chamber for the sprocket 26 or any other sprockets which may be necessary. Each bell ispro'vided with a substantially cylindrical shell 55 one portion of which is broken awayV or notchedas at 56 to provide room for the entry of the stand 29. rlhe pivot kpin 27 extends through hubs 57 and 58 formed, respectively, on the members 46 and 47 said pin being held in position bymeans of set screws 59. Certain portions of the cylindrical shells 55V abut each other so as to hold the substantially vertical webs 60 of the two bells in spaced relation. This construction is set forth clearly in Fig. 2 and is maintained by the set screwsl 59 which are set tightly against the pin V27 Y By referring to Fig. 3 it will be seen that the right or upper end of the notch 56 as designated at 61 is spaced above the adjaner the lower left end of the notch 62 is below the adjacent portion of the stand, thereby permitting the bells to move through a limited angular adjustment with respect to the stand 29. y

It is believed that the manner of assembly will be understood from the description already given, the shielding member 45 being first placed on its pivot pin and' then the two elements 46 and 47 being fitted around opposite sides of the member 45. Each bell is slipped .over its end of the pin 27, thereby rendering it unnecessary to remove the sprocket 26 from its operat-ing position. The nut 50 and bolt 49 serve to clamp the intermediate parts of the guard in fixed position and as previously described the set screws 59 will position the lower part of the guard.

I have shown a loom wherein the lay extends somewhat beyond the vertical line passing through the pivot pin 27, but it not infrequently occurs that the lay'will be of shorter length than that set forth herein, or it may be longer, in which ease the same parts of the guard as set'forth can be employed but their relation with respect to each other will be somewhat different, the shielding member 45 moving down along the upright side plates 52 and also Vtaking a different angular position with respect to the lay when the latter is short, and a correspondingly opposite relation will exist if the lay is longer than that shown in Fig. 1.

In certain other types of looms wherein the lay is desired to be at a position somewhat higher with respect to the pivot pin 16 than that shown in Fig. 1, a similar adjustment will be made, the bolt 49 and nut 50 permitting an extension of the telescoping members of the guard and the upper and lower members of the guard moving freely about their pivot pins 43 and 27, respectively. 'here the guard is to 'be adapted to a loom requiring a considerable angular movement of the bells from the positionshown in Fig. 3 the ends 61 or62, as the case may be, can be'cut away so as not to interfere ywith the stand 29. A f

From the foregoing it will be seen that 1 have provided a simple form of telescoping chain guard for a narrowware loom Wherein two' parts are employed, one telescoping in the other, each part being supported for free pivotal movement about one of the already existing portions of the loom; Itwill be seen that a guard constructed as set forth herein can be used on a variety of narrow ware looms which have lays of different lengths and also heights above the rocker shaft 16. Furthermore, the means for pivotally supporting the lower portion of the guard also act as a mounting for the sprocket 26. Also, with certain types of narrow ware 65 cent portion ofthe stand 29, and in like man-looms, the location of the rack rod 20 transversely of the lay assumes different positions so that the chain and the upper sprocket 24 will assume spect to the front of the lay, and in order to keep the guard central with respect to the chain an adjustment is made by means of the bolt 4l and slot 42 which extends transversely of the lay.

1 I-Ia ving thus described my invention it will be seen 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 I do not wish to be limited to the details herein disclosed, but what I claim is:

l. A guard for a narrow ware loom havi g a lay and a rocker shaft between which extends a shuttle driving rack operating member, a pair of telescoping members, one pivotally mounted with respect to the lay, and the other pivotally mounted with respect to the rocker shaft and having portions to lie around the rack rod operating member. 2. A guard for a narrow ware loom having a lay and a rocker shaft between which extends a shuttle driving rack operating member, a pair of telescoping members, one pivotally mounted with respect to the lay, and the other pivotally mounted with respect to the rocker shaft and having portions to lie around the rack rod operating member, and clamping means to hold the members together. Y

3. A guard for a narrow ware loom having a lay and a` rocker shaft between which extends a rack operating member, a guard comprising upper and lower telescoping memers, one member being pivotallymounted with respect to the lay, and the other memer comprising two elements each pivotally mounted with respect to the rocker shaft and means to clamp said elements to the upper member.

4, A guard for a narrow ware loom having a lay and a rocker shaft between which extends a rack operating member, a guard member pivotally mounted to the lay, a pair of guard elements one located on one side and the other located on the opposite side of the member, a pivotal connection between said elements and th e rocker shaft, and means to hold said member and elements together.

5. A guard for a narrow ware loom having a lay and a rocker shaft between which extends a rack operating member` a guard member pivotally mounted to the lay, said member being substantially U-shaped in horizontal cross section, and a pair of guard forming elements vlocated on opposite sides of the member and having telescoping relation with respect to the latter, and clamping means to hold said elements against the member, the lower portion of the elements being different positions with re-- tends, a pairof telescoping guard'members, V

one pivotally mounted with respect to the lay andthe `other pivotally mounted around the axis of the sprocket. Y'

'7; In a guard for a narrow ware loom having a lay and a rocker shaft with a sprocket supported with respect to the shaft and around which a rack operating chain extends,` a pair of telescoping guard members, one pivotally mounted with respect to the lay, and the other pivotally mounted about the axis of the sprocket, said other having a bell shaped portion to receive the sprocket.

8. In a guard for a narrow ware loom having a lay and a rocker shaft with a sprocket supported -with respect to the shaft and aroundwhich a rack operating chain extends, a guard member pivotally mounted to the lay, and a pair 'of guard elements each pivotally mounted about the axis of the sprocket and having a bell-shaped portion, said portions being in alignment to define a chamber for the sprocket, said member and pairofelements having telescoping relation, and means to clamp the elements to the member.v

I 9. In a guard for a narrow ware loom having a lay and a rocker shaft with a sprocket supported with respect to the shaft' and around which a rack operating chain extends,

i a pivot pin for the sprocket, a guard member pivoted to the lay, and a pair of guard elements each mounted .on the pin for the sprocket and secured thereto, the member and elements having telescoping relation, and means to clamp said elements and member together'.

l0. In a guard for a narrow ware loom having al lay and a rocker shaft with a sprocket supported with respect to the shaft and around which a rack operating-chain extends, a pivot pin for the sprocket, a guard member pivoted to the lay, and a pair of guard elements each mounted on the pin for the sprocket and secured thereto, the member and elements having telescoping relation, and means to clamp said elements and member together, the elements having similar but oppositely extending bell-shaped portions to receive the sprockets.

Y il. A guard for a narrow ware loom having a lay and a rocker shaft between which extends a rack operating member, a pair of teleseopingV members, one pivotally mounted with respect to the lay, and the other pivotally mounted with respect to the rocker shaft and having portions to lie around the rack operating member, and means to vary the pivotal support for the upper member relatively to the lay. c

lber mounted on the lay, and

l2. A guard for a narrow ware loom having a. lay and a rocker shaft between which extends a rack operatingmember, a pair of teleseoping guard members, one of which is pivotally supported with respect to 'the lrocker shaft, a 'pivotal support for Ithe other member mounted on the lay, and means to hold said pivotal support for the other member in any one of a plurality of positions relatively to the lay. e

13. A guard for a narrow ware loom having Va lay and a rocker shaft between which extends a rack operating member, a pair of teleseoping guard members, one of which is pivotally supported with respect to the rocker shaft, a pivotal support for the other memvmeans to hold said pivotal support Afor the other member in any one of a plurality of positions relatively Ato the lay in a direction transverse of `the `la 14. A guard for a narrow ware loom having a lay and a rocker shaft between which extends a shuttle rack operatingv member, a pair of teleseoping guard members,` one of saidmembers pivoted to the lay and having spaced parallel side walls between which eX- tends an end wall ribs formed on the side walls spaced from `and substantially parallel to the end wall, the

second member being pivotally mounted with respect to the rocker shaft and being 1oeated vbetween the end wall and ribs to be imited in pivotal movement by the ribs and end wall..

In testimony whereof I have hereunto affixed my signature.

ELBRIDGE B. HOLMES.

to connect said sidewalls,

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