US2245140A

US2245140A - Picker for looms

Info

Publication number: US2245140A
Application number: US336075A
Authority: US
Inventors: Brahs George
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-05-20
Filing date: 1940-05-20
Publication date: 1941-06-10
Anticipated expiration: 1958-06-10

Description

June 10, 1941. BRAHs 2,245,140

PICKER- FOR LOOMS Filed May 20, 1'940 INVENTOR, George zffa'h,

ATTORNEY.

Patented June 10, 1941 L'ji 2,245,140 ricxns For. LGOMIS George Brahs, liawthorne, N. .F.

Application May 26, 1940, Serial No. 336,075

Claims. (Cl. 139-160) This invention relates to that class of pickers for looms in which the picker is formed with a bore to receive a guide-rod on which the picker is reciprocated. Pickers are usually made of rawhide or some other light but equally hard or indurated and pliable material; in the case of pickers of the type mentioned they are usually formed of layers, say of rawhide, bent around a mandrel so as to form said bore, the extremities of the layers, or at least some of them, being secured face to face, as by rivets, all more or less generally as shown in my Patent No. 1,989,910.

Due to direct contact between the guide-rod and the pliable material of the picker there is frictional heating and consequent drying out of such material, in itself a considerable factor in promoting the wear which acts to enlarge and change the shape of the bore from true cylindrical to elliptical form, particularly at its ends, and also in weakening the material so that it responds to such change in shape, wherefore the picker becomes undesirably loose on the guiderod.

One object of this invention is so to construct the picker that the contact with the rod shall be borne by media better adapted to resist the wear than the pliable material of the picker. Such media in the example herein shown consist of bearing elements fixed in the body of the picker and exposed at the bore thereof.

It is usual not only to rivet the layers but also to cement them together, as with glue. Another object of the invention is to improve and prolong the life of the bond thus existing between the layers.

In the drawing,

Fig. 1 is an end elevation of the improved picker;

Fig. 2 shows the lining member partly in side elevation and partly in longitudinal section;

Fig 3 is an end elevation of said member;

Fig. 4 is a fragmentary end elevation of the picker in the form in which a bearing member is positioned at what I term the crotch in the picker;

Figs. 5 and 6 show the latter bearing member in side and end elevation, respectively;

Fig. 7 is a side elevation of a layer of the picker;

Fig. 8 is a section of two united layers, on a line such as 88, Fig, 6; and

Fig. 9 shows the picker and its guide-rod in side elevation.

The layer I forms what I have termed the lining layer, having been bent around a suitable mandrel of the same diameter as the guide-rod (as, Fig. 9) for the picker and thus forming the bore ac. How its margins are developed is not material, although as shown in Figs. 1, 3 and 4 they extend in the same direction and substantially parallel with each other. Extending bent around and in laminated relation thereto is a layer here existing as two

separate plies

2 and 3; the extermities of this layer extend from its thus bent portion in parallel and spaced relation to each other, there being in this example an intervening layer 4 which extends to the bore 11: and incidentally between saidmargins of the lining layer.

Remote from the portion a of the picker having the bore a and termed its head is the portion 1; which is to engage the shuttle and is thick ened up by other layers as shown, the intervening or narrow portion 0 being what is termed the shank of the picker. Rivets 5 penetrating the portions b and c bind the component layers together as usual.

In carrying out my invention the lining member has at suitably spaced intervals lengthwise thereof and around its bore metal studs 6 of a material, as metal, harder than the lining layer but preferably being of a softer material, as brass, than the guide-rod so as not to score or appreciably wear the latter. These may be rivets, as shown. Preferably they project into the bore, but in any event they assume a material part of the wear which the lining member would otherwise itself directly undergo by wiping contact with the guide-rod; and if they project they permit ventilation in the bore so that the heat otherwise incident to friction and likely to dry and thus cause disintegration of the lining member is dissipated.

The picker bore (by which of course I mean the passage through the picker which provides. the surface next adjoining the guide-rod) undergoes considerable enlargement at its ends,

to wit (referring, for example, to Fig. 9) at the points indicated at z and a, the former of which is at the picker-stick side of the picker and the side of the bore relatively adjacent the shank c and the latter of which is at the shuttle side of the picker and the side of the bore relatively remote from the shank, such being due to the angular displacement to which the picker is subjected by the shuttle when it is impelled back against the picker. Of course, the tendency for such enlargement to take place at the point a may be opposed by one or more bearing members such as 6. To oppose it at the point z and/or the corresponding point at the other end of the bore I provide as follows:

A plate 1, say of brass, is split from one edge and the metal both sides of the split is bent in opposite directions out of the plane of the plate. Thus is formed a bearing member generally T-shaped in end elevation. The unsplit portion or shank of the plate is to occupy the mentioned crotch d and its two oppositely bent portions Ia forming its head are to occupy the bore of the picker; the first named portion may be secured, as by a rivet 8, to any layer, as the layer 4 at its upper margin. There may be two such bearing members, one at each end of the bore.

When the various layers are assembled, as shown, they are usually glued each face to face with its neighbor. In time the glue deteriorates and the breaking of the bond between the layers is a factor which causes the picker soon to become useless. To insure a stronger and more enduring bond I have formed that surface of each layer which is to adjoin another layer with indentations 9 dispersed throughout substantially its whole area. This may be eiiected by compressing the layer, as in a hydraulic press, and a wire mesh of suitably heavy wire placed face to face with said layer. When any two layers, as in Fig. 8, which shows say the plies or layers 23, are subjected to pressure with glue l9 between them, the glue fills the indentations, thus both increasing the strength and the durability of the bond.

While bearing members such as one of those designated 6 and located at point z and one designated 1 and located at point z are preferably present I do not wish to be limited thereto since the presence of a bearing member at either of these points, as adjacent at least one end of the bore and cut by a plane which cuts the bore diametrically and also cuts what I term the extension of the picker, is within the invention; such extension is here formed by the shank c and head b.

Having thus fully described my invention, what I claim is:

1. In combination, with a loom picker formed with a bore for the picker guide-rod, a bearing member fixed in the picker and having a generally Tshaped form as viewed lengthwise of the picker bore and having its head located in the bore and arranged to wipe against the guiderod and its shank projecting away from the bore.

2. In combination, with a loom picker formed with a bore for the picker guide-rod, bearing members contained in the picker and each having a generally T-shaped form as viewed length- Wise of the picker bore and having their heads located in the bore near the respective ends of the latter and arranged to wipe against the guiderod and their shanks projecting away from the bore.

3. In combination, with a loom picker formed of pliable sheet material rebent and thus providing a bore at the bend therein adapted to receive the picker guide-rod and its extremities projecting in generally the same direction and forming between them a crotch extending from the bore, a bearing member consisting of a plate occupying the crotch and having a marginal portion extending into the bore and split and the parts thereof both sides of the split bent in opposite directions toward the surface of the bore.

4. In combination, with a loom picker formed with a bore for the picker guide-bore, numerous bearing elements for the guide-rod fixed in the picker and dispersed in spaced relation to each other around and lengthwise of and projecting into the bore.

5. In combination, with a loom picker having a bore for the picker guide-rod and having an extension projecting substantially laterally from said bore and adapted to receive at one side thereof facing lengthwise of the bore the pickerstick impact and at the other side to impinge against the shuttle, a bearing stud fixed in the picker near one end of the bore and in a plane cutting the extension and at that side of said end of the bore which approaches the guide-rod when the picker is angularly displaced by impact with the shuttle.

GEORGE BRAHS.