US2832998A - Neb - Google Patents

Description

May 6, 1958 R. K. WHITEHEAD 2,832,998

NEB

Filed June 2, 1953 1 INVENTOR zgw/w mrW/wzekead ATTORNEYS NEB Richard K. Whitehead, Emory University, Ga. Application June 2, 1953, Serial No. 359,054

3 Claims. (Cl. 19*134) My invention relates to textile machinery and specifically to a neb for guiding the journals of top rolls. The most common type of nebs heretofore employed are cast iron, but cast iron nebs are not entirely satisfactory, for the reason that they'are sometimes rough and therefore tend to collect lint, are noisy, present iron to iron surfaces which tend to wear the nebs as well as the top roll journals, require periodic lubrication and possess other disadvantages.

it is an object of my invention to provide an improved neb, which will overcome many of the difiiculties and disadvantages possessed by nebs of the prior art.

It is a more specific object to provide a neb, which has a body formed in part of metal, which is very smooth, and therefore not like to collect lint, and yet which presents good bearing surfaces for the journals of top rolls.

Another object is to provide a neb having cavities formed therein for the reception of wood or other bearing blocks to present good bearing surfaces for the journals of top rolls.

Another object is to provide a neb, preferably formed of diecast aluminum, having cavities formed therein for the reception of bearing blocks, which may be readily renewed, if necessary.

Other objects and various further features of novelty and improvement will be hereinafter pointed out or-will become apparent to those skilled in the art.

In the drawings, which show, for illustrative purposes only, a preferred form of the invention:

Fig. 1 is a top plan view of a roll stand employing nebs illustrative of the invention;

Fig. 2 is a sectional view, taken substantially in the plane of the line 22 of Fig. l, and showing the roll axis in horizontal instead of inclined planes as is usual in practice;

Fig. 3 is an isometric view of one of the nebs with a cap-bar finger in place;

Fig. 4 is an exploded view, on an enlarged scale, of the neb shown in Fig. 3; and

Fig. 5 is a fragmentary, isometric view of a single bearing neb having guides for a clearer roll.

in said drawings, the fluted drawing rolls 55 are journaled in the roll stand and are driven in the usual manner. The top rolls 66 rest on the driven rolls, and the journals 77 on the top rolls are guided on the nebs 8-8. The nebs 8 at the lower end of Fig. 1 are on the extreme end and are therefore provided only with single bearings for the top roll journals, while the nebs at the upper end of Fig. l are provided with double bearings, that is a hearing at each side, so as to guide the journals of two sets of top rolls, all as will be understood. The nebs, as is usual, are mounted on cap-bar fingers 9, which may be permanently secured to some of the nebs, and upon which other nebs'are adjust-ably supported, as is usual.

In the form shown, the nebs are formed of die-cast aluminum, which requires little or no finishing of any sort, and yet which is so smooth as to resist the collec- Patented May s, 1958 tion of lint. The die-cast nebs may be provided with bores, as indicated at 10, for the passage of the cap-bar fingers 9. If desired, the end nebs may be permanently secured to the cap-bar fingers, as by being cast directly thereon, or by having the cap-bar fingers secured in the nebs as by a tight press-fit. The other nebs are preferably adjustably secured on the cap-bar fingers 9, as by a one or both sides, depending upon whether the nebs are to have single bearings or double bearings. The notch or notches 12 preferably have side opening opposed cavities l3 bordering the notches, for the reception of bearing blocks 14 which a e preferably formed of wood, and preferablypresent end-grain surfaces to the journals 7-7. Thus, the Wood blocks may be impregnated with oil, and a very small but sufficient quantity of oil will ordinarily ooze out of the end-grain structure so as to keep the journals 7 lubricated, and yet no excess oil will drop out into the roving or other part, nor will there be sufiicient oil to tend to cause lint to stick to the journal or to any part of the neb. In order to hold the bearing blocks 14 in place, I prefer to provide the cavities 13 with relatively sharp fins or projections 15 to cut into the bearing blocks 14 when they are forced into the cavities. These fins will normally hold the bearing blocks securely in place. If it ever becomes necessary to renew the blocks, it is a simple matter to pry them out and slip new blocks in place. In the preferred form illustrated, the tops of the blocks are notched out or rabbeted, as shown at 16, so as to come up even with the top of the neb and present a perfectly smooth, flush top for the neb.

In order to provide a good and lubricated bearing for the axial end of the top roll journal, to take whatever end bearing thrusts occur in the top rolls, I prefer to provide a block cavity 17 at the bottom of the notch, and in this cavity is preferably placed a wood block 18 in which the end-grain structure is presented to the end of the journal 7. The cavity 17 mayrlikewise be provided with fins or other types of projections to hold the inserts in place. It will be seen, therefore, that the iron or steel journals 77 of the top rolls will be accurately guided and supported by the nebs, and the bearing blocks 14-18 will provide excellent bearing surfaces for the journal during its rotation. As heretofore stated, when end-grain wood is presented to the journals and the wood impregnated with oil, a minute, yet suflicient, quantity will ooze out so as to provide constant lubrication for the journal. The nebs, or certain of the nebs, may be provided with upstanding fingers 20 for supporting a stationary clearer 21, as will be understood, and additional fingers 22 may be provided so as to provide a fork for the journal of a roll clearer 23, which rests upon the top roll.v

it will be seen that I have provided a neb, which is simple in construction, very light in weight, and which will provide excellent bearings for the top roll journals. Generally speaking, the bearing blocks themselves carry sufiicient lubrication for lubrication of the top roll journals, and .if the bearing blocks should wear or require replacement, it is merely necessary to pry out the old blocks and force in new blocks. Thus the body'of the neb is not subjected to any wear and will last indefinitely merely by renewing thebearing surface members. If for any reason the nebs should sag down and come in contact with either the drawing rolls, or the top rolls,'or the journals, the wear will, generally speaking, take place on the aluminum nebs and the more expensive rolls will not be damaged. Furthermore, the improved nebs are very quiet in operation, since normally there are no metal t metal bearing parts to cause noise. p 7 While, the invention has been described in considerable detail and preferred forms illustrated, it is to be understood that various changes and modifications may be made within thefscope of the invention as defined in the appended claims.

I claim: i

l. A ne b including a body, said body having laterally projecting flanges at both ends, said flanges in turn having inwardly directed top and bottom flanges forming housings of U-shaped cross section facing each other, and non-metallic wear blocks fitting in said housings and presenting opposed facing surfaces for engagement by the journal of a top roll, said body having a bore therein for a cap bar finger, and means for securing the cap bar finger therein.

2. In the combination defined in claim 1, at least one of said top and bottom flanges at each side having a sharp fin parallel to said laterally projecting flanges, and lo- I cated in the generally U-shaped housings, whereby said fin will dig into and securely hold a non-metallic wear block when the latter is forced into the housing in a direction parallel to said lateral flanges and said sharp fins.

3. A neb including a body, said body having a web and lateral end flanges at both ends of said web, said lateral end flanges having inturned facing top and bottom flanges forming generally U-shaped housings facing each other, and wear blocks of wood fitting in said housings and presenting end wood wear surfaces to a journal of a top roll.

References Cited in the file of this patent UNITED STATES PATENTS

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