US462121A

US462121A - Card-flat

Info

Publication number: US462121A
Authority: US
Publication date: 1891-10-27
Anticipated expiration: 1908-10-27

Description

(No Model.)

J. P. FOSS. CARD FLAT.

No. 462,121. Patented 0ct.27,1891.

ing the stripping mechanism.

UNITED STATES PATENT Qrrrcn.

JOHN F. FOSS, OF LOIVELL, MASSACHUSETTS.

CARD-FLAT.

SPECIFICATION forming part of Letters Patent No. 462,121, dated October 27, 1891.

Application filed March 6,1891. Serial No. 383,998. (No model.)

To aZZ whom it may concern:

Be it known that I, JOHN F. FOSS, of Lowell, in the State of Massachusetts, have invented a new and useful Improvement in Card-Flats, of which the following is a specification.

My invention consists of a card-flat provided with two or more separate beveled faces or touches. By touch I intend and mean the face formed by the steel-tempered teeth of the usual card -clothing. The ordinary card-flat now in use is a one-touch flat and it is about two inches wide on its cylinder side. To narrow this width materially would necessitate a material increase in the number of flats, resulting in an undesirable multiplicity of troublesome parts and in complicat- If such a fiat were clothed up to or nearly up to each edge say, for example, to within three-sixteenths of an inch of each edgethis would resultin too much waste, or, in other words, the face or touch would be of such excessive width that it would take off too much good cotton from the carding-cylinder during the carding process. Consequently in the one-touch flat the clothing stops short a considerable distance of each edge. This narrowing of the face, while remedying the difficulty referred to, is, however, productive of another and equally serious difficulty, because thereby the space between the teeth of one flat and those of the neXtis made wider than the length of the staple of ordinary cotton, and the result is that in carding at high speed the staple is apt to and in practicefrequently does become tangled and snarled. Again, to produce the best results in carding the bites of the successive faces 01' touches (by bite I intend that longitudinal edge of the beveled face or touch of the cardflat which is nearest the cylinder) should be only about thirty-five per cent. farther apart than the length of the staple cardedas, for example, for three-fourthsinch staple the bites should be from one and one-sixteenth to one and one-eighth inches apart. Manifestly this would be unattainable in the ordinary one-touch fiat, unless by narrowing the flat itself, which, for the reasons above given, would be undesirable and, in fact, impracticable. Furthermore, the ca pacity of the machine is augmented and the quality of work done by it is improved as the number of beveled touches presented to the cylinder is increased. For the reasons hereinbefore stated there can be no material increase of this character with the ordinary one-touch flat.

It is to remedy the difficulties and to realize the advantages above referred to that my invention has been devised, My improved flat has on its cylinder side an acting surface composed of a plurality of independent beveled faces or touches. Theseveral touches are separated from each other by an interval (say from t-hree-sixteenths to three-eighths of an inch) less in width than the length of the common cotton staple, and the teeth are brought so near thelongitudinal edges of the flat thatthe space between adjoining faces or touches of contiguous flats will be of corresponding width. Thus the staple will be bridged from one touch to the next, whether the touches be on the same flat or on contiguous flats, and in this way I avoid the tangling or snarling of the staple above alluded to. Furthermore, in this way I am enabled not only to bring the bites into that proximity with one another needed to obtain the best results in carding, but also to obtain in an efficient and practical way that multiplication or increase in the number of the touches which is so desirable. The several independent touches or faces of each flat can be and preferably are assembled upon a single sheet of clothing, and the factthat they are thus assembled offers no serious obstacle to the grinding of the faces, although each has its own independent bevel. In Letters Patent No. 428,082, of May 20,1890, is illustrated an d described a machine for doing this work. This patented machine, indeed, was devised more particularly for grinding the flat, which is the subject of my present application.

In the accompanying drawings, Figurel is a plan of a portion of a flat embodying my invention. Fig. 2 is an end elevation of the same, together with a diagrammatic representation of part of a carding-cylinder, for the purpose of indicating the relation of the flat to the cylinder. In these figures the flat hasthree separate independently -beveled faces or touches. Fig. 3 is an end view of two flats placed side by side, each having two separate faces or touches. Figs. at and 5 are respectively a top view and an end view of a modification, hereinafter more particularly referred to.

A is the body of the fiat, of any usual or suitable construction.

B is the leather strip or backing in which the wire teeth are set. 0 are the faces or touches formed of these teeth, said faces being separated from one another by spaces or intervals at, as hereinbefore indicated, and the several faces of each fiat being in one sheet of clothing. The teeth adjoining the longitudinal edges of the flat are placed so near to these edges that when flats are placed together side by side adjoining faces or touches of contiguous flats will be separated by an interval about the same as that which separates adjoining faces on the same fiat. This is indicated in Fig. 3. The flat shown in the figure last named is a two-touch flat, and its body Ais of the same dimensions as the ordinary one-touch flat. The latter can thus be readily fitted out with my invention by removing the ordinary clothirg with which it is faced and substituting therefor a twotouch clothing, such as shown in the drawlngs.

Each face or touch, as indicated, has its own independent bevel, and it is desirable in most instances that in each individual flat each succeeding face should be slightly nearer the carding-cylinder than the one before it, as shown more particularly in Fig. 2.

A compound flat with a plurality of faces or touches asselnbledin accordance with my invention might be made by attaching several flat sections of the same general structure as the ordinary flat, but having thinner and considerably narrower bodies to one and the same back plate. Such a structure is shown in Figs. 4 and 5. The separate flat sections (threein numberin this instance) having coinparatively narrow and thin bodies A are secured in proper relation to one another to the back plate D by suitable means. The means in this instance consist of key-hole slots m in the plate and screw-studs y on the sections. The heads of the studs overlap the edges of the narrow parts of the slots, and by screwing down the studs the flat sections will be held in place. This construction allows each touch to be removed and handled independently of the others. I consider it, however, inferior on the whole to the construction first above described.

Having described my invention and the manner in which the same is or may be carried into effect. what I claim as new, and de sire to secure by Letters Patent, is

1. A card-fiat having a plurality of sepa-" rate independently-beveled faces or touches, substantially as described.

2. A card-fiat having a plurality of separate independent-ly-beveled touches on one and the same sheet of clothing, substantially as described.

3. A card-flathaving a plurality of separate independently-beveled touches, the teeth composing the several touches being of such relative length that each succeeding touch will as a whole project (in the'direction of the carding-cylinder) slightly beyond the touch before it, substantially as described.

4. A card-flat having a plurality of separate independently-beveled touchesand consisting of flat-sections armed or provided with said touches, and a back plate to which the individual sections are independently and detachably connected, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN F. Foss.

Witnesses:

FRANK A. DALY, HERVEY D. MELENDY.