US282874A - Edgae d - Google Patents

Description

(NoModel.)

E. D. FELLOWS.

VEETIGAL FEED SEWING MACHINE. No. 282,874. Patented Aug. 7, 1883.

N. PETERS. Phohrulhygmphor, Washington, D. C.

UNrrno STATES 'ATENT Fries.

EDGAR D. FELLOWS, OF VATERTOWN, NEW YORK, ASSIGNOR TO THE DAVIS SEWING MACHINE COMPANY, OF SAME PLACE.A

VERTICAL-FEED SEWING-MACHINE `-SPIEICIEICA'ZIIION forming part of Letters Patent No. 282,874, dated August '7, 1883.

.Application filed February 1, 1893. (No model.) i

To all whom it may concern,.-

p Be it known that I, EDGAR D. FnLLows, of Vatertown, Jefferson county, New York, ha've invented a new and useful Improvement in Vertical-Feed Sewing-Machines, which improvement is fully set forth in the following l with it, an auxiliary vertical feed-bar or helperv bar is employed. The invention is shown herein as applied to amachine of this construction, although it is applicable generally to machines of the class indicated.

It consists, mainly, in the combination, with the vertical feeding devices, of mechanism for controlling positively the position of the said devices at all points in their lateral or horizontal motion.

Heretofore the return motion of the feeding devices yhas been effected by means of a spring or springs.v In the machine described in the Patent No. 250, 053, to Thos. Carey, November 29, 1881, a return feed-dog is employed; but in the normal operation the springs return the feeding devices, and the feed-dog simply prevents the needle-cam roll or driver, by its action upon the heart-shaped needle-cam, from displacing the needle-bar when the latter, with the helper-bar, has been brought to a vertical position. Moreover, if the springs be omitted, the feeding devices will be left free from both dogs a part of the time, so that they are not at all points positively controlled.

The invention further comprises certain special combinations of parts, as hereinafter indicated. i

The accompanying drawings illustrate the head of aDavis sewing-machine constructed in accordance with the present invention, Figures l and 2 being views in vertical section at right angles to the goose-neck or stationary arm of the machine, and in elevation looking to the right, the two views showing the feed mechanism in different positions; Fig. 3, a view in vertical section parallel to the goose-neck and in elevation looking to the rear; Figs. 4 and 5, detail views; and Fig. 6, a view similar to Fig. l, showing a modified construction.

A represents the cam house or head of the machine; A, the face-plate; B, the shaft head or disk of the'feed-cam; B, the needle-cam roll or driver; C, the needle-bar 5 O,the needle-cam 5 D, the helper-bar; D', the presser-bar; E, the feed -lever or bellcrank; F, the regulatingyoke; G, the regulating-lever; I, the set-screw; J, the sliding cross-bar; K, the fixed stud; L, M, N, l), and R, rolls; Q, the shaft; S, the line of cloth-plate; T, a cam-groove, and U a stud.

The needle-bar C 'and helper-bar D pass through slots in the roof and floor of the camhouse A, or, more strictly, through slots formed in the iianges of the face-plate, and between the said flanges and the corresponding walls of the cani-house. The slot at the top has the roll P at one end, Aand the said roll and the side walls and opposite end wall of the slot form xed guides, which allow the said bars to swing horizontally or laterally in the plane of the feed movement, (at right angles to the length of shaft Q,) as well as to reciprocate vertically. The slot at the bottom of thecamhouse is longer than the combined width of the two bars, so as to permit the swinging motion above mentioned; but its width is equal to their common thickness, so as to-keep them y in the same plane of motion.

The needle-cam C is the ordinary grooved heart-cam, and is fixed to the needle-bar. It is engaged by the roll or driver B, which is fastened on the face of the revolving cam B, and which works in the groove in the needlecam, so as to reciprocate the needle-bar vertil cally. The needle-bar is so connected with the helper-bar and presser-bar that at each descent of the needle-bar the helper-bar is depressed and the presser-bar lifted, and at each ascent the reverse operations take place. The

device used for this purpose is or may be the usual bent lever long used in the Davis sewing-machine, which, as it is well known and IOO forms no part of this.invention,needs no illustration or particular description. 'The needle-bar is likewise connected with and operates the take-up in the usual way.

The sliding cross-bar J carries the rolls M N, which embrace between them the vertical bars C D, so that the three bars move together horizontally back and forth.

The regulating-lever G is carried by the cross-bar J, the stud U, which is fixed to the side of the lever G near one end, and serves as the pivot for said lever, being j ournalled in said cross-bar. The opposite end ofthe regulatin lever has a lateral projection which extends over the enlarged end of the cross-bar J, andV is provided with the set-screw I, which is tapped into said projection and adapted, when set down, to hold the regulating-lever in whatever position it isadj usted to. The front end of cross-bar J is arc-shaped, with the axis of stud U as a center, to facilitate the adjustment of the regulating-lever. The regulating-yoke F is attached to and movable with the lever G. The lever G, yoke F, and stud U are or may be cast in one piece.

The feed-lever E turns upon the stud K, xed to the side (right hand, Fig. 3) wall of the cam-house. The upper arm, which carries the roll L, is engaged by the feed-cam T B, the said roll L-fitting and working in said camgroove T. For convenience the groove is lmade in the inner (right hand, Fig. 3) face of the shaft-head or cam-disk B. The lower arm of the feed-lever, which carries the roll R, engages the regulating-yoke'F. By the rotation of the shaft Q and feed-cam T B the lever E is vibrated, and the roll R, acting upon the yoke F, reciprocates the sliding cross-bar J, which, of course, carries with it the needlebar C and helper-bar D. The stroke of the cross-bar depends upon the inclination of the yoke F, which can be varied by adjusting the free end of lever G up-or down, thereby diminishing orincreasing the stroke.

Fig. 1 shows the position of the feeding devices with the roll L in the cam-groove T at a point nearest the shaft, and the regulatinglever G at its highest point, holding the U- shaped yoke F in an inclined position, so that upon rotating the shaft-head B'the cam-groove T, acting upon roll L, will cause the feed-lever E to vibrate, carrying roll L up and down the yoke F without any effect upon kcross-bar J, to

which the yoke F and its lever G are pivoted.V

Fig. 2 shows the position of the feeding devices with the roll L in .the cam-groove T at a point farthest from the center of the shaft O, and the regulating-lever G at its lowest point, with the U-shaped yoke in avertical position.

`It will be observed that the feed-lever E being firmly pivoted to the cam-house A, as

` shown at K, and the yoke F being pivoted to the sliding cross-bar J, the position of bellcrank and yoke, as shown in Fig. 2, has drawn between the rolls M and N, as shown in detail in Fig. 5. By rotatingthe shaft-head B so as to bring the feed-lever E back to its position, as shown in Fig. 1, the roll R, working in the yoke F, brings the sliding cross-bar 'back to the position shown in Fig. 1. The position of yoke F in Fig. 2 gives movement enough to sliding cross-bar J to produce a very long stitch; but by raising lever G and clamping it in any intermediate position by means of the screw I the length of stitch can be regulated as desired.

It will be observed that by the use of the improved mechanism the lateral movement of the needle and helper bars is made positive both ways, and that said bars are always under the control of the feed-cam, it not being necessary to depend on a spring for returning the bars to a vertical position, or for other purpose, although one or more springs can be used, if desired.

The feed-cam B, the needle-cam C', and the needle-cam roll or driver B are s'o arranged that the cross-bar J and the vertical bars C D are moved in the direction ofthe feed (to the left, Figs. 1 and 2) after the needle-bar and helper-bar have descended, and that the reverse or return movement takes place after the foot of the helper-bar and the needle have been raised clear of the work.

In Fig. 6 the construction and operation are substantially the same as described with referenceto Figs. l to 5, but changes have 'been made in details. Thus the yoke F is inverted and the regulating-lever is pivoted near the front, instead of the rear, ofthe cross-bar, the regulating-lever is shortened, the pivot ofthe feed-lever is placed toward the rear, (left hand, Figs. 1, 2, and 6,-) and the shape of the feedlever is somewhat altered.

As shown, the shaft Q runs toward the op erator who sits at the front of the machine. The effect of this is, that the needle-cam roll or driver, by its action on the needle-cam, aids in returning the needle-bar to a vertical position, and in holding it in that position during its descent, instead of tending to displace it, as it would do if the shaft were run in the opposite direction. For a full explanation of the operation, reference may be had to the pat- IOO IIO

ent of Wm. S. Carlisle for improvements in j ofthe ordinary or of other suitable construc-` tion.

Modifications may be made in the details of construction without departing from the spirit of the invention, and parts of the invention could be separately used, if desired.

The term vertical feeding devices 7 is used herein to include one or more such devices.

Having now fully described my said invention and the manner of carrying the same into effect, what I claim is- 1. The combination, with the needle-bar and helper-bar, both of them movable vertically andlaterally, of a feed-cam placed in the cam house or head of the machine, and reciprocating parts operated by said cam` for imparting lateral movement to said bars, said reciproeating parts, having constantly a positive connection With said cam and feeding devices and with each other, so that the movement of said feeding devices independently of the feed-cam is atall times prevented, substantially as described.

2. The combination, with the needle-bar and helper-bar, both of them movable vertically and laterally, of a grooved feed-cam, a feedlever operated thereby, devices for communicating from said lever to said bars a back-andforth movement positive in both directions, and means for regulating the extent of said movement, substantially as described.

3. In a feed mechanism for sewing-machines, the adjustable yoke, in combination with the feeding devices and auxiliary operating means,

said yoke being movable With said feeding devices, substantially as described.

4. The Combination, with vertical feeding devices, of the sliding cross-bar, the grooved cam, a device engaged by the groove of said cam, so as to be reciprocated thereby, and connections for imparting from said reciprocatory device the return as Well as the advance movement to said cross-bar, and through it to the vertical feeding devices, substantially as described. j

5. The combination of the sliding cross-bar, the adjustable yoke, and the feedlever with means for vibrating said lever, substantially as described.

6. The combination of the grooved cam, the lever, the sliding bar, and the adjustable yoke, substantially as described.

7. The combination of the vertical feeding devices, the grooved feed-cani, the feed-lever,

the sliding cross-bar, the adjustable yoke, and

the rolls on said cross-banand lever, substantially as described.

In testim ony whereof I have signed this spectfication in the presence of two subscribing vWit- IleSSGS.

EDGAR D. FELLOWS.

Vitnesses: Y

LEVI A. JoHNsoN, JAMES C. BUR'r.

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