US1849333A

US1849333A - Guide for straw-braid sewing machines

Info

Publication number: US1849333A
Application number: US420034A
Authority: US
Inventors: Myers Walter
Original assignee: Singer Co
Current assignee: Singer Co
Priority date: 1930-01-11
Filing date: 1930-01-11
Publication date: 1932-03-15
Anticipated expiration: 1949-03-15
Also published as: GB359771A; DE549909C

Description

March 15, 1932. w MYERS GUIDE FOR STRAW'BRAID SEWING MACHINES Filed Jan. 11, 1930- Patented Mar. 15, 1932 UNITED STATES PATENT OFFICE WALTER MYERS, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE SINGER MANUFAG TUBING COMPANY, OI ELIZABETH, NEW JERSEY, A CORPORATION OF NEW J' GUIDE FOR STRAW-BRAID SEWING MACHINES Application filed January 11, 1920. serial No. 420,034.

This invention relates to improvements in worlcguides employed in connection with straw-braid sewing machines and has for its object to provide improved supporting means for the usual braid-dividing blade which rises edgewise from the work-support, whereby said blade may be readily shifted into an unobstructive position for certain stitching operations.

v In a preferred embodiment of the invention, the straw-braid sewing machine has a cylindrical work-supporting hornupon which is mounted the usual adjustable support having a swing-out edge-guide arm carrying a pressure-finger. The braid-dividing blade included in the work-guide combination, is in the present instance supported so as to be shiftable endwise into and out of operative position in an arc corresponding substantially with the curvature of the work-supporting horn. To this end, the blade-supporting means comprises an angular blade-shankpivotally mounted upon the closed-end face of a cylindrical end-cap removably fit-ted upon the free end of the horn, the pivotal-axis of the blade-shan k coinciding substantially with the center of curvature of the cylindrical horn.

in the accompanying drawings, Fig. 1 is a fragmentary front elevation of a straw-braid sewing machine fitted with a braidguide constituting a preferred embodiment of the invention. 2 is a fragmentary front end elevation of the machine. Fig. 3 is a perspecwork-cylinder and of the divider-guide applied thereto.

Referring to the drawings, the machine frame includes a cylindrical work-supporting horn 1 and a bracket-arm terminating in a head 2 overhanging the work-support. Mounted for swinging movements in the head 2 is a vibratory-frame 3, in which a needle-bar 4 carrying a needle 5 is journaled for endwise reciprocation. The vibratoryframe is connected by means of a link 6 with suitable actuating mechanism (not shown) to impart lateral movements across the line of feed to the reoiprocatory-needle while out of the work, whereby to effect the production tire view of the end-cap detached from the of zig-zag stitches with the aid of a complemental loop-taker (not shown) disposed in the work-supporting horn. Mounted for vertical movement in the head 2 is a presserbar 7 to which is secured a suitable presserfoot 8 yieldingly opposed to a feed-dog 9 having actuating mechanism supported by Mounted upon the guide-bracket 10, by a pivot-screw 14, is the swing-out arm, 15 carrying at its free end the edge-guide 16 for the straw-braid. J ournaled in a forward extention of the edge-guide 16 is the shank-bar 17 of a presser-finger 18 urged by a spring 19 to yieldingly bear upon the entering strawbraid initially directed by the hooked bar 20 supported. by the guide-bracket 10.

Slidably fitted upon the free end of the work-supporting horn 1 is a cylindrical endcap 21 of which the upper part is cut away throughout the length of the cap to provide guide-edges as 22, engaging the opposite ends of an arched throat-plate 23 suitably secured upon the horn 1. 4 The front side of the end-cap is further cut away, as at 24, to clear the supporting block of the guide-bracket, 10.

Upon the closed-end face 25 vof the end-cap is a pivot-bolt 26 which constitutes a pivotal support, substantially in the center of curvature of the end-cap for the shank 27 of a braid-dividing guide 28. The guide 28 comprises a blade disposed edgewise with respect to the end-cap cylindrical surface to rise therefrom in a vertical plane substantially bisecting the path of lateral vibration of the needle 5. The shank 27 extends laterally from the blade 28 and is of angular form, being bent about the end-face defining edge 29 of the end-cap. In the preferred embodiment of the invention, the edges-.30 and 31 of the blade 28 are arcuate and conform sub,- stantially with the curvature of the end-cap, the lower edge 30 preferably entering a groove 82 in the throat-plate 23 to guard against the braid creeping under the blade. Seating the blade in the throat-plate groove furthermore provides for the employment of a very thin blade, owing to the blade-steadying action of the throat-plate groove. Consequently, the adjacent braids may be guided to the needle in closely abutted relationship. Preferably, also, the free end of the blade 28 enters a slot 83 in the toe of the 'presser-foot 8 to efiiectively guide the braid to the needle.

The blade-shank 27 has a laterally extending lip 34 for conveniently shifting the blade manually into and out of operative position, the movement of the blade into operative position bein limited by a stop-pin 35 upon the end-face 25 of the end-cap. A frictionwasher 86 upon the pivot-bolt 26 is employed to hold the blade in any position into which it may be manually shifted.

The blade28, in its operative position, has the usual function of guiding into abutted relation one edge of the previously sewed braid and an edge of the braid entering the machine. However, the present blade-supporting means provides for conveniently withdrawing the blade endwise from its operative position and for shifting it about its pivotal support 26 into an unobstructive po sition, when desired, without affecting the position of the guides carried by the guidebracket 10.

Having thus set forth the nature of the invention, what I claim herein is 1. In a straw-braid sewing machine, the combination with stitch-forming mechanism including a laterally vibrating needle, of a braid-dividing blace disposed in front of the needle in a vertical plane substantially bisecting the path of vibration of said needle, and supporting means providing for bodily shifting said dividing-blade endwise into and out of operative position.

2. In a straw-braid sewing machine, a reciprocatory needle, a work-support presenting a curved wall in front of the needlepath, a braid-dividing blade rising from said curved work-support in front of the needle, and means for supporting said blade for movement into and out of operative position in an arc corresponding substantially with the curvature of the work-support.

3. A straw-braid sewing machine having a cylindrical work-supporting horn, stitchforming mechanism including a laterally vibrating needle, an edgewise-curved braid-dividing blade disposed in front of the needle in a vertical plane substantially bisecting the path of vibration of said needle, and means upon the work-supporting horn for support ing said blade for movement endwise into and out of operative position in. an arc corresponding substantially with the curvature of the work-supporting horn.

4. A straw-braid sewing machine having stitch-forming mechanism including a reciprocatory needle, a work-support comprising a cylindrical horn, a braid-dividing blade rising from said horn in front of the needle, and means for pivotally supporting said blade for movement endwise about a center corresponding substantially with the center of curvature of the cylindrical Work-supporting horn.

5. Asewing machine having stitch-forming mechanism including a reciprocatory needle, a cylindrical Work-supporting horn, a work-guiding blade rising edgewise from said horn in front of the needle, and pivotal supporting means for said blade upon the free end face of the Work-supporting horn.

6. A straw-braid sewing machine having stitch-forming mechanism including a reciprocatory needle, a cylindrical work- .ippoit ing horn having a removable cylindrical-cap upon the free end thereof provided with a closed-end face, a braid-dividing blade disposed edgewise upon the curved surface of said cap having an angular sup 'iorting-shank extending about the end-face defining edge of the end-cap, and pivotal supporting means for said blade-shank upon the end-surface of the cap substantially in the center of curvature of the end-cap.

7. A sewing'machine having stitch-forming mechanism including a vertically reciprocatory needle, a work-support comprising a horizontally-disposed cylindrical horn having a groove in its curved work-supporting surface in front of the needle extending in the direction of seam formation. work-feeding means acting crosswise of the horn, a work-guiding blade rising edgewise from said horn having its lower edge seated in said groove, and blade-supporting means providing for shifting said guiding blade into and out of operative position.

In testimony whereof, I have signed my name to this specification.

WALTER MYERS.