US187113A - Ilvlprovement in feed-mechanisms for sewingiviachines - Google Patents

Description

2 Sheets -Sheet I.

FE'YH. FEED MECHANISM FOR SEWING-MACHINES. 187,113.

Patented Feb. 6; 1877.

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N- PETERS. PKOTO-UTHQGRAPNER WA5H!NGTON. D. C.

ZSheets-Sheet 2.; H, FEYH. E FEED MECHANISM FOR SEWING-MACHINES. No. 187,113. Patqnted. Feb. 6,1877.

\Wtms us. 'ivwwitw. Qmmw 4 ETER -Ll OGRA HER, WASHINGTON. D. 4

,UNI ED. TATES,

. s a SAM'EjPLAOEgntE bM Eb ANIsms For sewn j-Be'it fknown that -I, HENRY FEYH; fer the lc i'ty', county, and State of New York, have invented a new and useful: Improvement in Sewing-Machines, which improvement is fully set; forth in the following"specification, refer-.- ence beiughad-to the accom'panyin'gdrawing's, in which U Figure 1 represents a longitudinal vertical section. 'Fig.'2-is a horizontal section. Fig, 3 is an inverted plan. Fig. 4 is a view o'f the feed-bar and bracket. 3

Similar letters indicate corresponding parts;

This invention relates to certain improvements in that class of sewing-machines in which a universal under-feed is used such, for instance, as that described in Letters Patent granted to John L. Uoles and David H. Goles, October 20, 1868, which feed mechanism consists of a bar that is free to move in the direction of its length, and also to assume an oscillating motion, and which carries the feeddog, in combination with a cam which acts on the feed-bar, and which can be adjusted so as to 'produce a feed-motion in any desired direction. In machines of this class the feeddog always assumes a slight oscillating motion; and, if a rectilinear seam is to be made, great care must be taken to prevent the work from being thrown out of the right directionv by the action of the feed-dog itself. I

This defect I have endeavored to remove by my invention, which consists in the combination, with a feed'bar, which is free to move in the direction of its length and also to assume an oscillating motion of a rectilinear feed- 7 slide, so that the feed-dog which forms a part of the feed-slide cannot be thrown out of its --rectilinear path by the oscillating motion of Q'Specification sw e er of Letters was No; lemma-dated mat 16.1817 applicat niiie 3 Ill 1- L -.December:18,1876,;- 3

' secured 'in' thefunder side of cloth plate,

ent-l: which-passes: through a slot, 0,;in said .feed-bar, so .th at. this bar 'isf free; to moiein the-idirectionof its length :and'also: to assume an-roscillatingmotion. The --rear end-of the braces a cam, E. .,This, cam .consist'sofa vcyl- 'inder, which isjplacedziman oblique position and feath eredxon a vertical arbor, F. ,Itisjprovided ,at'its .lowerendiwith a circular. groove, intowhichisfitted aringEorstrap, vd, that is pivoted to the forkedend. {of a -lever, G; This "leve ihas its fulcrum ou' a stud, e, which exted bracket, H, secured to the under side of the cloth-plate, and said slide connects, by a rod, I, with a thumb-screw, J, so that by turning this thumb-screw the position of the slide f and of its stud e is changed, and thereby the length of the stitches is regulated. The front end of the lever G is fork-shaped, and it catches over a stud, g, which extends from a slide, h, that moves in a slot in the bracket H. From this slide extends a stud, i, which engages with a cam-groove formed in a disk, K, that is mounted on the main shaft. By turning this main shaft, therefore, an oscillating motion is imparted to the lever G, whereby the oblique cam E receives a reciprocating motion, and, as this cam slides back and forth in the eye of the feed-bar D, the required feedmotion is produced. By moving lever Gr the-oblique cam E receives a reciprocating motion, and as this cam slides back and forth in the eye of the feed-bar D, the required feed motion is produced. By turning the shaft which carries the oblique cam E, the direction of the feed-motion is changed, and by moving the fulcrum ot' the lever G the throw of the oblique cam is increased or decreased, and thereby the length of the stitches is regulated, as above stated.

The feed-bar is made in two sections, its front section being-connected to the main section by means of a pivot, j, and subjected to the action of a spring, which depresses the same upon a lever, L, that rests upon a cam, M, mounted on the main shaft. By the combined action of this cam and spring the front Section of the feed-bar is alternately raised or feed-bar formsl-aring orleye, 0,, which e;m-'

tends from a slide, F, that is guided in'a slotlowered, so that the teeth of the feed-dog N, which rests on said front section of the feedbar, are caused to engage with theworl g, when the feed-motion is to take place,and then said teeth'are lowered out of contact with the work,

in order to allow the feed-dog to recede, ready for a fresh forward movement.

The feed-dog, which has been generally used in-"conn'eotion'with this universal feed mech anism is made circular, being firmly secured to the feed-bar, and made to embrace the needle-throat, so that by turning the oblique cam said feed-dog is adaptedtoffeed in any desired direction. he produced, however, with thisfeed mecbam ism, the work is liable t'o'b'e thrown out'of the right line, and it requires constant attention to maintain the proper direction, In order to overcome this difficulty I remove the circular .fe'ed dog from the feed bar, and substitute therefora bracket carrying a pin, l, (see Figs. land 2,) which engages with a slot, m, in a slide, 0, that carries the feed-dog'Nh" The slide 0 'is-fitted into a recess in the cloth-plate; and it is provided with projections n, which catch in grooves in the sides of said recess,

and prevent the slide from being displaced If a rectilinear seam is to 'byLetters Patent, is-

The combination of the feed-bar D, which is free to move in the direction of its length,

and also assumeau oscillating motion, of the bracket carrying the pin 1, the rectilinear feed-slide O, carrying the feed-dog N, and provided with slot m to receive said pin hand the cloth plate, substantially as described,

-' whereby thefeed-dog is prevented from being thrown out of its rectilinear path by the oscillating motion ofi thefeed-bar, as set forth.

In testimony that I claim the foregoing I have hereunto'set my hand and seal this 11th day of December,'1876.

"Witnessesf W. HAUFF, E. F. KAs'rENHUBER.

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