US305937A - landis - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

B. F. LANDIS.

SEWIN MACHINE FEEDING-AND GHANNELING DEVICE. No. 305,937. Patented Sept. 30,1884. I

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ATTORNEYS.

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(No Model.) I 2 Sheets-Sheet 2.

B. F LANDIS.

SEWING MACHINE FEEDING AND GHANNELING DEVICE.

No. 305,937. Patented Sept. 30, 188 4.

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I WITNESSES:

ATTORNEYS; i

NITED STATES BENJAMIN F. LANDIS, OF ST. JOSEPH, MISSOURI.

SEWING-MACHINE FEEDING AND CHANNELING DEVICE.

SPECIFICATION forming part of Letters Patent No. 305.937, dated September 30, 1884. Application filed April 7, 1883. on model.)

To alt. whom it mm; concern:

Be it known that I, BENJAMIN F. LANDIS,

ing and Channeling Devices, of which the fol-' lowing is a description. 4

The obj ectof my invention is, first, to secure absolute certainty of feed on any kind of material; second, to feed the upper and lower parts of the work exactly alike, or to feed either part faster than the other; third, to avoid the friction consequent to feeding under a'stationary presser-foot; fourth, to produce a channel in the act of sewing in which the stitches may be buried to any desired depth in the work.

To this end my invention consists in the construction and combination of parts hereinafter described and claimed, reference being had to the accompanying drawings, in which- Figure 1 is a perspective view of a sewingmachine, showing my feeding and channeling devices. Fig. 2 is a rear View. Fig. 3 is a front view. Fig. 4 is a side elevation as viewed from the right. of the channeling-knife holders; and Fig. 6 is a transverse vertical section, part in elevation, of the feeding-spur attachments.

The body of the machine consists of the base A having a fixed arm, A, raised over it, and a vertical race or slideway in a head, A, at the end of said arm, for the needle-holder to reciprocate in.

B is the table on which the machine rests.

G is the presser-foot actuated by springs b b, to hold the work down, as usual. A yoke, a, bears on top of the bar of the presser-foot G, to which yoke the said springs are secured by screws E E, whereby the pressure on the work may be regulated. This presser foot also serves, in conjunction with the piece D, to firmly grasp the work to feed it to the needle. To this end each piece 0 and D is given the usual movements, known as -thefour-motion feed. Each is actuated by mechanism independent of the other, yet the two are so related that they always advance together. Either feeder may be set to feed longer stitches than Fig. 5 is a detail view the other when it is desired to full the work on that side, as in setting in coat-sleeves, '&c.

Any usual method may be adopted for giv ing these two feeders the following four motions:

First,to press together upon any intermediate work; then to move forward, carrying said work; then to separate, and, finally, to retreat to the point of starting, leaving the work advanced the distance of one stitch. I herewith show one set of mechanism whereby the above may be accomplished. The first or downward movement of the upper feeder, O, is caused by the springs Ifb when permitted to act by the descent of arm R, as hereinafter described. a.

The second movement-that is, the feed properis produced thus: The vertical bar of the pressenfoot O is provided with trunnions G which enter vertical grooves in the head A. These trunnions rise and fall and rock in said grooves as the foot rises, falls, and rocks in the act of feeding. E is a rod connecting the foot 0 with one. arm, F, of a rock-shaft, G, having another arm, M, which is engaged by a stud, C, adjustably fixed on a rod, L. This rod is fitted to slide in hangers I K, depending from a bracket-arm, H, which is secured to the body A. O is a roller on a block adj nstably secured on rod L, to engage an inclined segmental flange, Y, on the driven pulley Y.

The third and fourth or return and rising movements of the feeding-foot G are produced thus: Arm R is actuated to raise'the feed-foot G by means'of a connecting-rod, U, pivoted to said foot at U. T is a block securable at any point desired upon rod U by means of asetscrew, U, to hang rod U high or low on arm R,

to accommodate work of different thicknesses. The lever B and the point U, at which rod U is attached to feed-foot 0 both being at the rear P, fixed to body A, and thelower end of the same rodpasses'through a guide-hole at P in the frame.

The lower feed, D, is actuated as follows:

Z is a roller pivoted on one face of wheel Y,to act at each revolution upon a projecting plate, X, secured to lever X to depress it. Lever X being horizontally pivoted at X, its opposite end and the lower-feeder, D, pivoted thereon at D, is raised thereby into contact with the work, which, being at the same time pressed by the upper feeder, O, is rigidly held between said two feeders. At this time a cam, Z, secured to the main shaft N, acts against the edge of lever X, which is vertically as well as horizontally pivoted at X, to draw forward feeder D.

I spring, Z.

bis a set-screw, against which lever X is thrown by a spring, X, as soon as cam Z disengages the lever, which occurs immediately after roller Z dis'enzages plate X, leaving lever X free to be raised at its rear end by a Thus the lower feeder, D, is depressed by spring Z and then returned to the starting-point by spring X.

0am Z causes fecderD to advance to the same point always, whatever be the length of the stitch, said length being regulated by setscrew 1), allowing lever X to be drawn more orless backward. On the contrary, the upper feeder is always retracted to a fixed point;

but by means of the roller 0, adjustable on rod L, it may be-given' more or less positive throw by cam Y.

' To assist in feeding thick worklike har+ ness-leatherl provide one or both feeders with spurs U and U, to project into the work directly in the path of the stitches. At the same time I make these spurs somewhat blunt and space them relative to the needle, so that they shall enter each stitch-hole, th ereby pressing the stitches into better form and evening their apparent length. The feeders recede upward and downward, respectively,

enough to free these spurs from the work before they recede to take another stitch. The spurs may be screwed or otherwise adjustably secured in the feeder.

Q represents my channel-cutter, which is a sharp blade rigidly fixed by means of an adjusting-clamp, Z, to project from the body of the machine through the feeder to any extent required. To force the work upon such a fixed blade is one of the necessities for my strong clamp-feed, without which it could not be accomplished. I

I am aware that a lower feed and an upper feed similar to mine have each been used sepa rately; but I do not know that both have been used together to clamp firmly on the work, and then both advance together to feed the work along.

,and block G,.the roller and adjustable block zontally:reciprocating said feed-foot, of the lethe head=A, the lever B, and the means; de- .scribed for operating said feed-foot and said :secfureby Letters ,latcnt, is -v 1. The combination, with an upper and a lower feeder, and means for clamping them intermittently upon the work, of a cutting-blade f xed in. the path of the stitches, substantially as describerhwh'ereby a channel will 'be cut for the stitches to bury in.

2., The combination, with the feed-foot 0, having trunnionsO on its sides, of the head A, having a vertical slot for the body of feeder (1, and vertical side slots fortrunnions O to reciprocate in, and means, substantially as described, for reciprocating said feed-foot both vertically and horizontally, as shown and described, wherebythe; foot may swing upon its trunnionsin'said slots and give the same amount of feed at any height to which :it may be raised.

3. The combination, with the vertically-slotted headA and the feed-foot 0, having trunnions O to engage said slots, of the yoke a, engaging said feed-foot, the springs b and b, secured at oneend to head A and at the other end to said yoke a, and .the adjusting-screws E E, substantially as. shown and described.

4. The combination, with the feed-foot 0, having trunnions 0 theslotted-headA, the 0 yoke a, the springs b. b, and the set-screws EE, of therock-shaftG, having arms F M, the connecting-rod'E, the slide-bar L,.the stud O, the wheel Y, having the cam Y, and the .shaft N,: as and for-.xthe purpose specified.

5. 'The' combination, with the feed-foot 0, having trunnions G", the slotted head A, and the means described fordepressing and hori- 10o ver It, connecting-rod U, the rod 1?, provided with vyoke 1?, and the cam O on shaft N, as shown and described. g y

6. The combination, with the feedfoot O,

lever, of the rod U, connecting said feed-foot and said lever, and the block T and set-screw U, substantially as described, whereby the feed-foot may be adjusted to anygiven height, I I0 and then go throughall the movements to their full extent, for the purpose specified.

7 The combinatiomwith the base-piece A and the lower feeder, D, of the lever X, provided with both horizontal and vertical pivots at X,the pivot D,.and..the plate X, the wheel Y on shaft N, the roller Z, thecam Z, spring X, and set-screw l), as shown and described.

BENAMIN F. LANDIS.

XVitnesses:

Fnixncis W. BRADLEY, .VVILLIAM D. SIOELUFF.

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