US1975728A

US1975728A - Sewing machine

Info

Publication number: US1975728A
Application number: US665891A
Authority: US
Inventors: William J Moran
Original assignee: Singer Co
Current assignee: Singer Co
Priority date: 1933-04-13
Filing date: 1933-04-13
Publication date: 1934-10-02
Anticipated expiration: 1951-10-02

Description

W. J. MORAN SEWING MACHINE Oct. 2, 1934.

Filed April 15, 1953 4 Sheets-Sheet l Max/MA;

g1'uewtoz/ [William Jlloran 7% mw mm Oct. 2, 1934-. w J MORAN 1,975,728

SEWING MACHINE Filed April 13, 1953 4 Sheets-Sheet 2 g Z; V 5 41 6'8 WA Knew I r W i I I. W I I W,

Oct. 2, 1934. j J, MORAN 1,975,728

SEWING MACHINE Filed April 15, 1933 4 Sheets-Sheet 3 62) 729 {William JMra/z Oct. 2, 1934. w J MORAN 1,975,728

SEWING MACHINE Filed April 15, 1933 4 Sheets-Sheet 4 WA/mew F2 554170 f Patented Oct. 2, 1934 UNITED STATES SEWING MACHINE 'William J. Moran, New York, N. Y.,

assignor to The Singer Manufacturing Company, Elizabeth, N. 1., a corporation of New Jersey Application April 13, 1933, Serial No. 665,891

Claim.

This mventionrelates to sewing machines and has for an object to provide a sewing machine for use in neatly and securely attaching a binding strip to the raw edge of a rug in a new and 5 improved manner.

Another object of the invention is to provide an improved rug-edge-finishing seam and meth- 0d of making same including a binding strip so secured to the raw edge of a rug as to conceal and protect the attaching stitches and be inconspicuous and neat in apearance and strongly resistant to deformation in use.

With the above and other objects inview, as will hereinafter appear, the invention comprises 5 the devices, combinations, and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment of the invention, from which the several features of the invention and the advantages attained thereby will be readily understood by those skilled in the art.

Fig. 1 of the drawings is a front side elevation of a sewing machine embodying the invention.

Fig. 2 is a fragmentary front end elevation of the machine. Fig. 3 is a fragmentary view of the top feeding mechansm of the machine from the side opposite that shown in Fig. 2. Fig. 4 is a perspective view of the sewing machine throatplate showing the cut-out portion designed to accommodate the binding strip guide. Fig. 5 is a top plan view of the bed of the machine adjacent the sewing point. Fig. 6 is a section on the line 6-6, Fig. 5. Fig. 'l is a section on the line '7--7, Fig. 5, with work in the machine. Fig. 8 is a 5 perspective view of strip as attacgid thereto by the machine of Figs. 1 to '7 inclusive. Fig. 81s a perspective view of the rug with the binding strip folded around the stitches shown in Fig. 8 and whip-stitched to the back of the rug, and Fig. 10 is a sectional view of the finished seam shown in Fig. 9.

The sewing machine is constructed with the usual frame including the bed 1 from which rises the standard 2 of the overhanging bracket-arm 3 terminating in the head 4 in which is mounted on'trunnions 5, 5, the gate 6 for the recipro'catory and laterally vibratory needle-bar '1 carrying the eye-pointed needle 8. The needle-bar is reciprocated by the usual link-connection 9 with the o crank 10 on the main shaft 11. The needle-bar gate 6 is vibrated by the usual link-connection 12 with the slotted lever-arm i3 fulcrumed at 14 on the bracket-arm 3 and having a follower 15 entering the needle-bar-vibrating cam-groove a rug edge with a binding,

16 in the disk 1'! geared at 17' to the main shaft 11 to run at half the speed of the latter.

Cooperating with the needle 8 below the bed 1 to make zigzag overedge lock-stitches is the usual oscillatory shuttle 18 which works in a vertical o0 plane parallel to the plane of vibration of the needle 8 and is oscillated by the usual link-connection 19 with the rotary crank 20 at the lower end of the vertical shaft 21 geared at 22 in oneto-one relation to the main shaft 11, as shown, 5 for example, in the patent to Friederich, No. 545,882, of Sept. 10, 1895.

The work is fed through the machine preferably by means of a toothed top-feeding wheel-23 fixed to the shaft 24 journaled in the bracket 25 fulcrumed at 26 to the stationary bracket 27 rising from the bed 1. The bracket 25 carries a screw-pin 28 which passes through the horizontal slot 29 in the fitting 30 fixed to the lower end of the usual spring-pressed presser-bar 31. The feed-shaft 24 carries a ratchet-wheel 32 with which cooperates the feed-pawl 33 and holding pawl 34. The feed-pawl 33 is mounted on the vibratory arm 35 which is fulcrumed upon the shaft 24 and is vibrated by means of the pitman 8 36 which at its upper end embraces the eccentric 37 on the main shaft 11. The arm 35 is slotted longitudinally to receive the adjustable block 38 carrying the pivot 39 to which the pitman 36 is connected. By loosening the thumb-nut 40 the pivotal connectlon39 may be shifted toward or away from the center of the shaft 24 to adjust the amplitude of the feed-movement of the feedwheel 32. The pawl 34 is pivoted to the bracket 25. Both pawls are spring-pressed into operative engagement with the wheel 32. v

The feed-wheel 23 presses yieldingly upon the back face of the rug which is passed, pile face down. over the thick work-supporting plate 41 slotted at 42 to receive the fastening screws 42' which are threaded into the bed 1 and permit the plate 41 to be adjusted laterally of the direction of feed. The plate 41 is undercut to provide a rug-pile clearance recess 43 above which is the relatively thin edge 44 spaced from the bed 1 and having its front comer rounded at 45.

Cooperating with the edge 44 of the rug-supporting plate 41 is the rug-edge-bending guide 46 having a shank 4'7 received in a groove 48 in the plate 49 secured to the bed 1 by screws 50 passing through slots 51 in the plate 49. The shank 4'1 of the guide 46 is held inthe groove 48 by means of the screw 52 which is carried by the strap 53 I overlying the shank 47 and screwed to the plate no 49. Provision is thus had for adjustment of the guide 46 transversely of the line of seam-formation to cause the needle 8 to penetrate the downwardly bent edge of the rug at the desired distance from the edge at each alternate thrust. The lateral adjustment of the guide 46 is preferably so made that the needle on its wor penetrative thrust along the line H, Fig. 7, will emerge at the juncture 54 of the pile fibres 55 of the rug with the woven rug base 56 at the raw edge of the latter. The needle, on its next or overedge descent passes along the line bb, Fig. '7, without penetrating any part of the work.

The zone between the lines aa and b-b reprecooperates with the overhanging edge 44 of the plate 41 to bend downwardly the raw edge of the rug and present it in this condition to the lat- The guide 46 is cut erally vibrating needle 8. away at 58 to admit the needle, as shown in Fig.

5. It also has a confining wall 5'2" overhanging the undercut edge 44 and merging into the upstanding wall 57.

Let into the bed 1 is the throat-plate 59, Fig. 4, formed with the laterally elongated needleaperture 60 and depending needle-guide fin 61. The throat-plate 59, which is generally oval in shape, is cut away at 62, 63 to admit the flat strip-guide tube 64 which is received in a groove 65 cut in the bed 1 lengthwise of the line of seamformation. The strip-guide 64 terminates closely in front of the needle-hole 60 in the throatplate and the edge 63 of the throat-plate is slanted upwardly and rearwardly, as shown in Fig. 6, to smoothly guide the binding strip issuing from the guide-tube onto the throat-plate. The guide-tube 64 has secured thereto a fiat shank 66 which is slotted at 6'1 for reception of the fastening'screws 68. The groove 65 in the bed 1 is wider than the guide-tube 64, thus permitting the guide-tube to be adjusted sidewise or transversely of the line of seam-formation, so that one edge of the binding strip 69 will'underlap the down turned raw edge of the rug, Fig. 7, and be safely caught by the needle 8 on its work-penetrating thrust and stitched in juxtaposition with the raw edge of the rug by a series of zigzag overedge lock-stitches; the plane of the binding strip being horizontal. and at an angle to the substantially vertical plane of the base 56 of the rug at the raw edge of the latter. The plate 41 is recessed in its under face at 41' to afford clearance for the binding strip 69 after it passes the needle 8.

Fig. 8 illustrates the work after it has passed through the machine. The binding strip 69 is first attached to the raw edge of the rugby a series of overedge zigzag lock-stitches comprising the needle-thread loops '70 and shuttle-thread 71. It will be observed that the work-penetrating stitches have a relatively wide bite in the relatively loosely woven base 56 of the rug and a relatively narrow bite in the selvage of the more tightly woven binding strip. The overedge stitches in conjunction with the work-penetrating stitches, bind the fibers of the rug-base tightly together and effect a more secure anchorage of the work-penetrating stitches inthe rug-base and a more secure attachment of the initially stitched edge of the binding strip to the raw edge After the binding strip 69 has been attached to the rug-edge, as shown in Fig. 8, it is folded around the overseamed edge into engagement with the back of the rug and whip-stitched at '72 by hand to the back of the rug; the binding strip 69 concealing and protecting the raw edge of the rug, as well as the zigzag stitches, and projecting but little beyond the edge of the pileforming portion of the rug.

Having thus set forth the nature of the invention, what I claim herein is:

1. In a sewing machine, the combination with overedge stitch-forming mechanism and means for guiding a rug of pile fabric with its pile face down and its base edge-portion bent downwardly within the stitching zone, of feeding mechanism, and means for guiding a binding strip with one of its edges underlapping the downwardly bent free edge of the base of, the rug within the stitching zone and with the other of its edges without the stitching zone.

2. The combination with top feeding mechanism and stitch-forming mechanism including a reciprocatory and laterally vibratory needle and a shuttle cooperating therewith to form zigzag lock-stitches, of means for guiding a rug of pile fabric with its pile face down and its base edgeportion bent downwardly within the stitching zone, and means for guiding a binding strip horizontally with one of its edges underlapping the downwardly bent free edge of the base of the rug within the stitching zone and with the other of its edges without the stitching zone.

3. In a sewing machine, a bed and bracketarm, stitch-forming mechanism including a reciprocatory and laterally vibratory needle, a throat-plate having a needle-aperture and a cutaway portion in advance of the needle-aperture,

a strip-guide received in said cutaway portion in position to deliver a binding strip to the needle with one edge of such strip within and the other edge without the stitching zone, a rug-face-supporting guide overhanging said strip-guide, a rug-edge-bending guide overhanging said supporting and strip-guides and having an upstanding wall-portion cooperating with an edge of said rug-face-supporting guide to bend downwardly an edge-portion of the rug within the stitching zone, and a top-feed wheel cooperatively opposed to said rug-face-supporting guide in rear of the sewing point.

4. A sewing machine having a frame including a flat bed and an overhanging bracket-arm, stitch-forming mechanism including a reciprocatory and laterally vibratory needle, a throatplate let into said bed and having a needle-aperture, said throat-plate being cut away in advance of said needle-aperture, a strip-guide tube let into said bed in advance of the sewing needle and receivedin the cut-away portion of said throatplate, a relatively thick work-supporting plate secured to said bed and having a relatively thin edge-portion overhanging and spaced from said guide-tube, a rug-edge-bending guide presenting an upstanding wall rising from said throat-plate and spaced from the free edge of said work-supporting plate, and a top-feed element cooperatively opposed to the upper face of said worksupporting plate.

5. In .a sewing machine, in combination, a frame including a bed and overhanging bracketarm, overedge stitch-forming mechanism including a reciprocatory needle, a throat-plate having a needle-opening, a strip-guide let into said bed and throat-plate to direct one edge of a binding strip within and the other edge without the stitching zone of the stitch-forming mechanism, a rugsupporting plate mounted on said bed and having an undercut edge overlapping said strip-guide at one side of the stitching zone, a rug-edge-bending guide mounted standing guide on said bed and having an up- -wal1 spaced from said undercut