US1989910A - Loom picker - Google Patents

Description

G. BRAHS LOOM PICKER Feb. 5, 1935.

Filed March 6, 1934 INVENTOR,

Patented Feb. 5, 1935 v LOOM PICKER;

' George Brahs, Hawthorne, NlJ. I 1 ap l cdtit rr rchfig 1934-; Serial-No; 3114285. 3Claims, (arise-71 60).

A picker for looms, made of rawhide or the like thick material which when soaked in water is responsive to shaping by pressure but which when dry is exceedingly tough, usually-has the 5 following parts whereby a tubular head to slide on a guide-rod of the loom and a shank to engage the shuttle and receive the impact .ofthe pickerstick and be guided in a slot of the shuttlewbox of the loom are formed (see the Wynne PatentNo. 1,801,064) A bearing or lin ng, member to-slide on said guide-rod formed from'a rectangular blank of said material having its {opposite extremities extending in the samedirection and spaced from each c-therand' its mid-portion bent to the contour'of a partial cylinder a rectangular interlay of a said material forming at one edge thereofand with the bentmid-portio-njof said member a-bore and extending from the bore betweenv and beyond said extremities; a single strip ofqsaid material straddling said member and; having its extremities receiving between them those of said mem ber and extending beyond the same in face tofacerelationrwith said interlay;- and means, as rivets, binding together all four of said ex- I tremities and also the extremities of the strip and the interlay where they exist faceto face, the whole being molded under pressureso that the head willexist in conventional partial cylindrical form around the-bore and the shank will be composed of said extremities and interlay, being perfectly fiat and of uniform thickness except where; the extremities of said member exist and thus (near the head) give the shank a reinforced thickenedneck. W

This construction hasthese faults: The standard thickness of the shank of a picker is onehalf inch. With-the mentioned interlay. present only one ply can form each extremity thereof and the portion of the strip-which immediately straddles the lining member. Consequently the part of the picker which immediately includes the head and neck is weak, Since the. lining member is not endless the portion of the strip which is in the .headhas to, withstand, practically "alone,- these forces which are incident to the COCkiIlgfOl skewing of the picker in ahorizontal plane o-n'the guide-rod incident to the'action of the picker stick, wherefore said portion becomes distorted and stretched or enlarged at its ends and ceases to move trulyrectilinearly on the guide-rodfaiod in time it may actually break apart. "Another fault is that'the neck, where the picker stick imparts its blow, is too weak and soon becomes distorted and deformed. fAnother fault is that when the parts in' forming. the picker are subj c d to pressure "the mentioned interim; may or may not remain 'withits mentioned margin truly up to the perimeter Of thecyl-inder of the bore, and if -it does not it allows at the very outset of the use of the. picker the mentioned skewingtoensue.

According to this'invention I overcome these faults and, in addition, provide, a picker which will be self-lubricating. 1 a

In the drawing, Fig, l'isa pl'anof the picker; Fig. 2, is a side elevation thereof;

Fig. 3ushowsrthe lining member in sectional perspective; I w

Fig. 4 shows .uFigs, 5 and 6 are plans of the blanks forming thepair; of strips 3 and the lining member. For the lining member I use a rectangu-lar blank (Fig.6) .of rawhidel having oneedgeportion turned back-onitselfand forming a flat fold 1a. This is bent aro nd a asuitable cylindrical core or; mandrel (not shQW- so that its mid-portion conforms I tremity and the opposite extremity extend in the same direction; andface to face-r-specifically, with-said edgeport-ion in face to face contact with said opposite extremity and the bent'midportionforming with thefree-marginof said edge portiona completely cylindrical-bore.

Instead of the, mentioned single strip and interlay I e pl l m na ed r p 2 an 9f rawhide each having the form of the blank shown in-Fig, 5 andof substantially uniform thickness and which are ;bent around the lining tmember soasto straddle the same and-thus flank atr eachside the flange or projection of said member formed by itsmentioned extremities-as far as they extend, and then flank: each other, as shown in-Fig, 2. 7 Thus, with thelining member, they form at 4 the head of the picker and where they embrace ,said flange and fiankeach other in operative position;

they form therpicker shank, 5, thickened up or reinforced as at the neck 5a. At 6 are the rivets which bind the several parts together, some penetrating all seven plies at and some penetrating the, shank remote fromthe neck. The free'end' of the shank may be thickened up with rawh de,

as at r, inany approved wayso. as toadapt it to withstand impact with the shuttle which is shown, at min :Fig. 4, I) being. the shuttlebox having the slot in which-the shank'of thepicker is guided, dtherod penetrating the bore of and forming a guide for the picker and e the picker stick projecting through a hole the picker shank. On assembling-the'parts, of which the rawhide elements will be first softened by soaking, they are subjected to, pressure to insure in particular the true cylindrical form of the head n t ene all p rf t y fla rm o the sha with a thickness of one-half inch. Animportant feature here to befremarked-is-the fact that the e t i 2 s, thicke an th str p .3.

- t1 e, d s r b d construc ion I a able to.

touacylfnderand its foldforming exform the picker with a shank which as to its main portion (outward of the neck and between the same and part :12) is of standard thickness (one-half inch and all of one-half of whose thickness is continued into the neck and head of the picker to form the portion thereof which immediately straddles the lining member. Hence said portion is reinforced, or now of double thickness, and therefore effectually resists any expanding influence exerted by the guide-rod d on the (split) lining and the consequent distortion of the picker head, especially manifesting itself as an enlargement of the endsof the bore, and the neck is reinforced against the impacts of the picker stick and the stretching strains incident to the mentioned expanding influence of the head which naturally, if allowed to distort the head, reach into theneck of the picker. And it should not be overlooked that at each side of the mentioned flange of the lining there are in the neck two plies, of an equal. thickness, of material, so that in this respect and for resisting suchstrains as might otherwise reach into the neck both sides of the shank are balanced in point, of strength as well as weight atthe neck. Moreover, by omitting the interlayand substituting a lining member which has the mentioned flange extending short of the legs of the laminated strips 2-3, when the pressure is exerted and on applying the rivets there, is a tendency to crowd the flange bodily toward the mentioned mandreL so that when the picker is completed the free margin lb of the edge portion 1a of the lining forms with-the bentor curved portion of the latter a completely cylindrical bore, as shown in Fig. 2.

I realize that in the Gordon Patent No. 203,139 a picker is disclosed in which one-half of the four plies in the shank are continued into the head and that in the Kelly Patent No. 397,649 a fold is formed which has a margin presented to the bore in the head. But the first of these, having its liningmember provided with but a twoply flange, lacks not only desirable thickness in 3 the neck but that resistance to skewing of the picker which is obtained when the lining member has a three-ply flange and the middle ply presents its edge at the bore; andthe second of these, in which any lining assumed to exist is not an independent member but is an integral part of a single strip of which the picker is composed, has the fault that the neck of the picker at one side has but a single ply outward of the lining to withstand the friction and those strains which may reach into the neck as an incident of the tendency of the picker to skew.

A factor important in the resistance of the head and neck to the forces indicated is the circumstance, as shown, that the outer of the layers 23 is the thicker. This not onlyincreases the life of the picker as against the influence of friction, especially where the shank slides in the slot 0, but it greatly exteriorly reinforces the picker as a whole. Besides, since by so much as the layer 2 is the thicker the layer 3 is decreased in thickness, the latter is the more responsive to the more acute bending which it has to undergo, which is a factor in producing and also preserving in the picker that intimacy of'contact between all its component layers which is essential to its solidity, in turn an important factor in its durability.

The bent portion'ofthe lining is provided, as at 7, with tapering apertures whose greater diameter is at the outside, and these apertures are filled with graphite 8, or equivalent lubricating substance. When the layers or strips 2-3 are applied lubricant-containing pockets are thus formed which are only open at the inside or at the bore of the picker, wherefore when the picker slides on the rod d it will be selflubricating and yet the lubricant will not be wastefully drawn out of the pocket by the rod. This feature of my invention applies to any picker comprising, with a part forming a passaged head (as here the straddling or rebent portion -of .the strips 23) and the shank, a lining member having a portion thereof snugly fitting the passage of said part and provided with the defined apertures and a solid lubricant therein. 1 Having thus fully described my invention what I claim is: Y

1. A loom pickercomprising a lining member formedfrom a generally rectangular blank of stiff thick sheet material having one edge portion turned back and the fold thus resulting forming one extremity of the member, said member having said extremity and the opposite extremity thereof 'pro'ject'ing in the same direction with said edge portion in face to facecontact with said opposite extremity and having its mid-portion bent to the contour of a cylinder and forming with the free margin of said edge portion a completely cylindrical bore, a pair of laminated strips of said tough thick sheet material each of substantially uniform thickness straddling said member and having their extremities receiving between them the extremities of said memberand extending beyond'fthem in face to face relation to each other and forming therewith the picker shank, and securing devices penetrating all four extremities and also the extremities of the strips where they exist face to face with each other. V I r 2. A loom picker comprising a lining member formed from a generally rectangular blank of stiff thick sheet material having one edge por tion turned back and the ;fold thus resulting forming one extremity of the member, said member having said extremity and'the opposite extremity thereof projecting in the same direction with said edge portion in face to face contact with said oppositeextremityand having its"mid-- portion bent to'the contour of a cylinder and forming with the free margin ofsaid edge portion a completely cylindrical bore, a pair of laminated strips of said tough thick sheet material each of substantially uniform thickness straddling saidmember and having their extremities receiving between them the'extremities of said member and extendingbeyond them in face to face relation to each other and forming therewith the picker shank, the relatively outer strip being the thicker of the'two strips, and securing devices penetrating all four extr'emitiesand also the extremities of the stripswhe're they exist face to face with each other; 3. In combination, with the part of a loom picker including a head and a shank, the head having a passage therethrough to receive the loom guide-rod, a lining member having a portion thereof snugly fitting said passage and having anaperture. penetrating said portion from its said passage to said lining and closed at its outer end by the head and having greater-diameter at its outer end thanat its other end, and a massconsisting wholly of lubricant in solid form filling said aperture. I

- Y GEORGE BRAHS'.

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