US1872994A - Knock-off mechanism for looms - Google Patents

Description

Aug. 23, 1932.

W. E. LUNDGREN KNOCK-OFF MECHANIS-M FOR LOOMS Filed Nov. 2, 1951 2 Sheets-Sheet l 1|l|T||||||1|lL -TIIII I .il ||||I| T. |l\ |||\|l.| l

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Aug. 23,` 1932. w. E. LUNDGREN KNOCK-OFF MEGHANISM FOR LOOMS 2 Sheets-Sheet 2 Filed Nov@ 2. 1951 www `have also shown Patented Aug. 23, 1932 UNITED s TAfr WILLIAM ii. LUNDGREN, or

& KivoWLEs Loom worms, MAssAcHUsETTs v Knock-'OrrV ivrncimnisivr .Fon Looivrs Appiicatiqn ie'gi November 2, 1931.Y

This-invention relates-to mechanism providedfor stopping a loom on the failure of a shuttle to properly enter the .shuttley box.

Such mechanism 'operates to stop the lay in i its forward movement and also to release the shipper and disconnect the driving mechanism. j f

It is the object of my invention to provide improved means for yieldingly resisting and checking the forward mevement ofthe lay. A further object of the invention is to provide means by which the yielding resistance to the lay may be conveniently increased or decreased.

My inventionv further ments and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings, in which Fig. 1 is a plan view of portions of a loom embodying my improvements;

Fig. in th direction of the arrow 2 in Fig. 1;

Fig. 3 is a sectional end elevation, taken along the line 3-3 in Fig. l, and

Fig. 4 is a perspective detached view of my invention.

Referring to the drawings, I haveshown parts of a loom including a lay having the usual cross shaft l1 and dagger 12, the point of the dagger being depressed by the action of the shuttle as relates to' arrangeit enters the shuttle boX. I a portion of a breast-beam 14 secured to a loom side 15, and a portion of a shipper lever 16 engaged by a contact screw 17 adjustably threaded in the end of a l knock-off member 20.

The member 20 is loosely mounted in a recess or guideway in a stand 22, secured to the under side of the breast-beam 14 by bolts 23. A iiat spring is formed from a plurality of separate spring leaves secured together at one end by a clamping bolt 3l.

The member 20 is engaged near the middle of its length by an abutment or upward projeotion 33 on the stand 22, and one end of the spring-clamping bolt 3l is received in a recess 34 in the side of Y thus shortening Y placing it undei' 2 is a front elevation thereof, looking the abutment or projec- Serial No; 572,607.Vv tion, thereby i `preventing Y endwisey displacement of the spring. Y

The knock-off member 2O is provided with an offset lug or shoulder at its innerend, and the ree end of the spring 30 is positioned to engage the projection 35 and thus Vprevent. outward endwise movement of the member 20. VA cylindrical roll or fulcrum member 40 is positioned between the forward Vface ofthe spring 30 and a cam surface 4l formedon the inner side of a projecting portion 42 of the stand 22. An adjusting screw 44 is threaded into the projection 42 and engages the fulcrum member 40. y j As the fulcrummember is forced inward, its point of engagement with the spring^30 is advanced toward the free end of the'spring, and stifening the spring. At the same time the roll 40 is forced rear# ward by the cam surface 4l, thus bending the middle Vportion of the spring rearward and of the spring may thus be effectively increased or decreased by means of theV adjust# ing screw 44. j.

The stand 22 is providedl with an opening at its rear side, thus permitting engage ment of the dagger 12 with the knock-oft' member20. The stand 22 is also provided with an elongated transverse recess or open-` ing 51,V permitting unobstructed movement of the dagger 12 when in the loweredinoperative position indicated in dotted lines in Fig. 3. If the shuttle fails to box, the dag# ger 12 will remain in the raised or operative position indicatedinFig. v8 and as the dagger moves forward, theV pointed end of kthe dagger will be received in a notch or recess 2 in the rear .face of the knock-o5 mem-` ber 20.

The knock-off member will then'be pushed forward against the resistance of the spring 30 until the springl overcomes the inertia of the lay and prevents further forward movement of the member 20. At the same time the swinging movement of the member 20 causes the screw 17 to engage and release the shipperlever 16 or to otherwise disconnect the driving mechanism. j YThe interval in which the lay is` brought greater tension. The actionv labor is necessary,

means lto 'move said knock-'offy member, 'a'

means to move .sai leaf spring seated justing mechanism described. The "eo'nstruee" tion of the device is such that no assembling spring 30 and the f ulcrum member 40 'are' merely dropped into recesses inthe standvlQQ and reqnire no attachment thereto.

Having thu'sfdesc'ribed-' my invention land the advantages thereof, I do not wish to be limited fito the details herein disclosed, other wisetth'zm-as-,set forth inthe claims, but what -I fclaimisi-s f 1. Ima-"loom, a knock-off member, a stand inV Vwhich said -memberis .movably mounted, means to `move said knock-off member, 'a flat leaf "spring having endportion V"loosely i seated in va recess in' -saidstand, whereby said spring is held from endw'i-se displacement, the.1'oppositefendportionfof 'said spring vengagin'g said lnoc'lvofffr me'mb'er, and'-means engaging said spring between Vits end portions Yand;effective' 'tof vary the lte'nsion 'of spring; j Y

'21% In a'loom,

Vinwlfi-ch said me ber is movably mounted',

multi-leaf springse' ted. at one end in sai stand "and lhaving its saidv lmockbf I'Iifenfiber, and means tofvary the tensionfof :said vvmultifleaf spring.

' 3. In va loom,

in which said. me ber is movably mounted, means to 'move said flatleafjspring'seated'atonejend in said stand and having its freeendengaging said knock,-

V oifmember, a fulcrum me be'r engaging "saidy nt 'in'termediate'y its ends, and

spring a p o me'an's'toinove s 'ai'd `fulcrum member lengt-h'- wisel'of saifd spring; y

'Ilfe "combinationin a loom as set forth@ in claimv 3, in whichf the knock-off Ymember, the sp'rin`g,and the 'loosely thereto. y

In loom, a shoulder `ratene sai-d knock-off member, engaging and yieldingly movement of vsaid knock-od member and also engaging lsaid"shoulder on said member to lp'revent'endwise vdisplacement of said mein- 6: In albern, inwhichfsaidm'ember is movably mounted, knock-off member, a l.flat

and having ofi' member, a fulcrum member engaging said. spring at'ap'oiiit 'intermediate its ends, said Astand 'havingy a camsurface as theV member 20, the:

said

"a kiioekioii member, estan/dl free end engaged by' a knoeleof'f member, 'a' stanfdf l fu'l'crum member are'j` .a'l'l held in sai'd stand but areunatt'ached Y a lmocl-olfiinember having. y end, a stand in which `said Y member ismovably mounted, means to 'move anda fiat leaf 'spring y resisting swinging,

a knock-off member, a stand at oner end in [said stand,

and having its free end engaging said knock-V off member, a fulcrum member engaging said spring at a point intermediate its ends, and

Vmeans to move said fulcrum member to bend the intermediate y:portion Aof 'said :spring toward -said knock-offmeinbn f 7 In a loom, a knock-off member, a standY Y in which said member is mgvably monnthed,

its free end ng-agmgfsaidlnoclrleaf spring engaged by said ful'c'ruii1`member,andmeans to move said fulcrufm memberalong saidCamsurface,:therebyV shiftinggthe ful'crum of said spring yboth longitu-dinalflyand transverselyrelatively'to said f y me

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