Патент USA US2131012код для вставки
Sept. 20, 1938. M. McCANN 2,131,012 BUTTON SEWING MACHINE Filed April 3, 1936 2 Sheets-Sheet l Sept. 20, 1938. M, McCANN 2,131,012 BUTTON SEWING MACHINE Filed April 3, 1936 2 Sheets-Sheet 2 _ Patented Sept. 20,1938 2,131,012 ‘UNITED STATES PATENT OFFICE 2.131.012 BUTTON SEWING MACHINE Michael McCann, Ozone Park, N. Y., assignor to The Singer Manufacturing Company, Eliza beth, N. 1., a corporation of ‘New Jersey Application April 3, 1936, Serial No. 72,460 12 Claims. This invention relates to button-clamps for but ton sewing machines, and it has as its primary object to provide an improved clamp which will more securelyhold shank buttons than clamps 5 heretofore available; which is adjustable to ac commodate buttons of various types and sizes; which is self-locking and therefore cannot be (Cl. 112-114) . . a button-supporting foot, adapted to receive the wire shank of a so-called military button, oper ating in conjunction with a work-support de signed so to hold the work that the button is secured by blind stitches. 5 Fig. 3 is a plan view of the parts shown in Fig. 2, omitting the needle-bar, needle, and the, lower opened inadvertently by accidental movement of the button; and which readily may be used in 10 conjunction with various types of work-supports, portion of the bracket-arm head. Fig.4 is a view similar to Fig. 2 showing the improved button-clamp ?tted with a button-sup- 10 whereby the buttons may be attached by either through-and-through or blind stitches and either with or without stay buttons. These objects have been, attained by the pro " vision of a button-clamp having a supporting arm, a plurality of interchangeable button-sup porting foot designed to receive a leather shank button, with a button-holding am having a cup- porting feet adapted selectively to be secured thereto, each foot having a recess designed to re ceive a diflerentltype of button-shank, and a 20 two part button-holding lever pivotally mounted on said supporting‘arm and adapted to engage a button to hold the shank thereof in the recess in the supporting foot. _ One part of the button clamping lever is adapted to have the other part 25 movably mounted thereon. The latter part may comprise any one of a plurality of interchangeable button-holding arms each provided with a cup like button-engaging portion, which portions vary like button-engaging portion designed to receive a smaller button, and with the world-plate of the machine fitted with a work-support adapted to 15 hold a stay button, whereby the button and stay button are attached to the work simultaneously by through-and-through stitches. Fig. 5 is a view similar to Fig. 4 but showing/‘the button-clamp ?tted with a button-supporting foot 20 designed to receive a self-shank button, with a button-holding arm similar to that shown in Fig. 2, and with the machine fitted with still another form of work-support adapted for blind stitching. Fig. 6 is a diagrammatic view illustrating the 25 self-locking feature of the present improved button-clamp. ' ' ’ Referring more speci?cally to the drawings, in shape and size to conform to the shape and size 30 of different sizes and types of buttons to be held. the invention is disclosed as applied to a button Due to the adjustability of the button-holding portion of the lever and the shapes and sizes of the various cup-like button-engaging portions, multiple point contact, full surface contact or 35 two line contact, at diametrically opposite sides of the button, may be obtained between the but ciprocating and laterally vibrating needle-bar 6, arm head 5, within which is supported a re ton and the arms, as distinguished from the single carrying a needle ‘I. The bed is provided with a forwardly extending work-supporting horn 2‘ 85 within which is mounted lower stitch-forming mechanism which cooperates with the needle in point contact and single line contact of prior the formation of stitches. Inasmuch as the means button-clamps. Thus the present clamp more se 40 curely holds the buttons and more effectively pre vents movement thereof in the button-clamp. The self-locking feature of the clamp is ob tained by the speci?c connection between the button-clamp lever and its actuating lever as 45 hereinafter will be explained. Other objects and advantages will be in part indicated in the following description and in part rendered apparent therefrom in connection with 50 sewing machine comprising a supporting base I, 30 a bed 2, standard I, bracket-arm l, and bracket the annexed drawings in which: Figure 1 is a side elevation of a Singer Class 1'15 for actuating the needle and the construction ‘of, and means for actuating the lower stitch-forming 40 mechanism, may be conventional and form no part of the present invention, illustration and de scription thereof are deemed unnecessary. The improved button-clamp comprises a sup porting arm I hinged to a portion of the sewing 45 ) machine, as for example, by its attachment to‘ an angle piece 9, pivoted, at it, to a bracket Ii secured to the standard 3. At its forward end the arm I has a downturned portion 8" provided with a seat. I“ adapted to receive anyone of a. .50 button sewing machine embodying the present plurality of interchangeable button-supporting invention. feet such, for example, as-the feet i2, i3 and I4 shown in Figs. 2, 4 and 5, adapted to hold, re spectively, wire-shank buttons 1:, leather-shank 7 Fig. 2 is an enlarged, left end elevation of a portion of the machine illustrated in Fig. 1, show 65 ing the present improved button-clamp fitted with buttons 1! and self-shank buttons 2. v 55 .2 2,181,012 The material m to which the buttons are to be secured, may be held upon any suitable form of into engagement with the lower wall 4‘ of the bracket-arm (see Figs. 1 and 4) . Continued up support located beneath the button-supporting ward .movement of the clamp causes the lever 24 feet, such, for example,'as the work-supporting to be swung downwardly, relative to the arm 8, blocks l5 and I6 removably and interchangeably in opposition to the spring 28. During this move mounted upon pins l1 and I8 projecting upwardly ment, the ?nger 21' is, in e?ect, moved down from awork-platei! securedupon the portion wardly and acts upon the wall 2| b of the slot 2|“, therebyvcausing the button-clamping lever 2|, 20 2a of the bedv 2., The block I5 is adapted pri ‘marily "for blind-stitch sewing, while the block to be swung clockwise,‘ about the pivot 22, to the 10 I6 is adapted for through-and-throughstitching position indicated in dotted lines in Fig. 4. This with a stay-button. If desired, blocks similar to releases the button so that it may be removed the block IE but without the stay-button cavitys wfrom the button-clamp and replaced by another may be‘ employed. Another form ,of work-sup port, which may be used’ in conjunction with the present improved button-clamp, is ‘shown in Fig. 15 5. This work-support is similar to that'shown in’ U. S. patent to Lyons, No, 1,654,593,.Jan. 3, 1928. Referring to Figs. 1, 2 and 3, it will be seen that cooperating with the foot l2, tohold the 20 buttons, is an arm 20',.provided¢wi_th a cup-like ‘button-engaging head 205 adapted to engage the button xto hold the ,shankr'thereof in a suit ableaperture formed in thevi‘oot. .Asshown in Fig. 2, this head 20‘ provides twobutton-engaging 25 portions,» 20b and 28° which contact with. the button at ,'opposite sides of the center thereof, thereby holding the, shank of thebutton in the .foot 12 and vpreventing tipping‘ of the button. , Fig. 3 illustratesathev line contact between the 30 portion 20b and the headof thebutton. Asimi lar line contact is provided by theportion 20°. ' , _The arm .20 comprises one part of a two-part button-clamping lever which is adjustably mount ,ed,>for'horizontal movement, 'onjthe other part 2|, pivotally mounted upon a shoulder screw 22. 10 button for a subsequent sewing operation. As the clamp is lowered, the-spring 28 causes the lever 24 to be swung upwardly, relative to the arm 8, 15 whereupon the end '2‘! acts upon the wall 2| '1 of theslot 2|c andthereby-turns the lever-2|, 20 counter7clockwise to bring the‘ portion 2|]a into contact with the button. > > ,- Fig. 6 illustrates diagrammatically the means 20 provided for preventing opening of the clamp by movement of the button. In that ?gure the force exerted by the button on the clamping arm 20 is represented by the arrow 1‘. This force tends to turn the lever 20, 2| clockwiseabout the pivot 25 22. Thus the contact point of the wall 2|’- on ‘the ?nger 21 is-moved in‘ an are q and exerts a force on. the ?nger, which force is represented by the line 0 perpendicular-to the line i inter- ' secting the axis of the pivot 22 and said contact 30 point. The force 0 is the componentof a verti cally acting force a and a horizontally acting force 17. It will readily be perceivedthat if either the force a or the force I) is resisted the member 20, 2| cannot'be moved. As shown by Fig. 6 the force I) 35 This screw issecured in the downtumed portion -i’s"resi'ste'd by a counterforce, represented by the 8“ of the clamp-supporting arm 8 and has -i forward end, projecting through a slot 2|'|cl form in the horizontal portion of the arm 28. A nut arrowd due to the fact'that the stationary wall 8d of the slot 80 is in contact with the side of the ?nger 21. ' - ' ' - ' 23 threaded on the screw 22 serves to clamp the ' From the foregoing it will be apparent that this arm ;20_ to the lever 2| in any desired position of - clamp is selfelocking against movement initiated by the button, while the button-clamping arm is ' adjustment. ‘ The arm 20 is adjustable length .wise of the lever 2| to compensate for various 4 free to be moved by actuation of the lever 24. Fig. 4 shows an arm 208 removably secured to thicknesses of the button heads. Thus, regard less of the thickness of the heads of the buttons the lever 2| in place of the arm 20 of Fig. 2. This 45 to be attached, full contact may be maintained arm has acup-like portion 20“, which is smaller therewith at'opposite sides .of‘ the center of the button. . _ . than the portion 20“ 'of the arm 20, and which is , designed to hold smaller buttons.,such for ex ample as the button 1/. Fig; 5 shows the arm 28 adjusted inwardly on 60 and the ‘arm 20 carried thereby, in a clockwise ' 50 the leverv 2| to cause the portion 20B'thereof to direction (asseen in Fig.2) . to open the button Means is provided for swinging the lever 2|, enga'ge,,by two line contact at diametrically op tion to close the clamp afterlthebutton has'been - posite sides of the center of the button, a but clamp, and tolswing them inthe opposite, direc inserted;v This, means comprises j an, actuating ,lever 24¢,pivotally mounted vzit-25 'toa stud 26 tonhaving a relatively thin head.. _ Having thus set forth the nature of the in 65 ‘carried. by-the supporting arm 8. The forward - vention, what I claim herein is: ‘ end of this lever isi’ormed as a cylindrical ?nger ' ’ 1. A button-clamp for shank-type buttons 21 which projectsthrough a slot 8‘7 inthe portion comprising a supporting arm, a button-support Bland ?ts between the walls 2|‘i ‘and 2|h of an ing 'foot carried thereby and provided with a ‘inclined slot 2|c formed in a portion 2|‘l of the button-shank receiving aperture, a button-hold 65 lever ‘ 2|. The lever“ is normally maintained in the position shown in Figs. 1 and 2 by the ing lever pivotally mounted on said supporting action of‘ a coil spring 28 located between the upper surface of the arm 8 and the head 28- of a tubular nut 29 threaded upon the‘ upper end of a rod 38 ‘connected to the lever 24. .The arm 8 and the parts carried thereby ‘are normally held ton'to hold the shank thereof in said aperture, depressed by ‘the ' action of “a spring-pressed plunger 3| as shown in U. 8., patent to Lyons, 70 No_.1,583,062,. May 4, '1926, but ‘may be swung vupwardly about the pivot ||| by suitable treadle actuatedmeans designated generally asit. After ‘the button has been attached, initial upward movement of the button-clamp'breaks the thread 75 (as is well understood) and brings the head 29' 60 arm and adapted to engage the head of the but— and means to adjust a portion of said button holding lever bodily relative to said supporting as foot to compensate for variations in thickness of the button-heads. , . . _ 2. A button-clamp 'for shank-type buttons vcomprising a supporting member, a, button-sup port provided thereby and located at one face of 70 the button, a button-holding element carried by said supporting member and'adapted to engage the other face of a button to maintain the .but ton in av substantiallyvertical position and in contact with said button-support, and means to 75 3 effect a relative bodilyadiustment between said button-holding element and said button-support transverse to a face of the button to provide uniform contact between the button and said element regardless of the thickness of the button. 3. A button-clamp for shank-type buttons comprising a supporting arm, a button-support provided thereby, and a two~part button-holding member pivotally mounted on said supporting 10 arm andadapted to engage the head of the but ton to hold the shank thereof in contact with said button-support, one part of said button holding member being movable relative to the other part to compensate for variations in the 15 button-heads. 4. A button-clamp for shank-type buttons comprising a supporting member, a button-sup porting foot carried thereby and provided with a button-shank receiving aperture, a two-part 20 button-holding lever pivotally mounted on said supporting arm, and spring-actuated means nor mally urging said lever into contact with the head of the button to hold the shank thereof in said aperture, one part of said button-holding lever being movable relative to the other part to maintain uniform contact between said lever and the button regardless of the thickness of the button-head. 5. A button-clamp for shank-type .buttons 30 comprising a supporting arm, a button-support ing foot carried thereby and provided with a button-shank receiving aperture, a button-hold ing lever pivotally‘ mounted on said supporting arm, and a cup-like button-engaging portion carried by said lever adapted to engage the head of the button at opposite sides of the center thereof to hold the shank of the button in said aperture. 6. A button-clamp for shank-type buttons 40 comprising a supporting member providing a button-support having a button-shank receiving aperture, a two-part button-holding element mounted on said member and including a but ton-engaging portion adapted to contact with , buttons at opposite sides of the center-thereof to hold the button-shanks in said receiving aper ture, one part of said button-holding element be ing movable relative to the other part to maintain uniform contact with the button regardless of variations in the button-heads. - '7. In a sewing machine-having a frame and a arm and provided with a button-shank receiving aperture, 9. button-holding lever pivotally mounted on said supporting arm, and having an inclined slot therein, means including an actu ating lever pivoted to said arm and having a portion within said slot to swing said button holding lever in one direction into contact with a button to hold the shank thereof in the aper ture in said foot, means actuated by the tilting movement of said button-clamp to swing said .10 lever in the opposite direction to release said button, and means to adjust the position of said button-holding lever bodily relative to said sup porting-foot to compensate for variations in the thickness of buttons. 9. A button-clamp comprising a pivotally mounted supporting arm, means to raise said arm, a button-supporting foot carried thereby, a button-holding lever carried by said supporting arm and cooperating with said foot to hold a 20 button, means actuated by the upward movement of said supporting arm to swing said button-hold ing arm out of contact with the button, and means to lock said-button-holding arm against movement under the in?uence of the button. 25 10. A button-clamp comprising a supporting arm provided with avertically arranged slot, 9. button-supporting foot carried by said arm, a button-holding lever carried ‘by said supporting arm and cooperating with said foot to hold a . button, said lever being provided with an in clined slot a portion of which is aligned with the slot in said supporting arm, an actuating lever piyotally mounted on said supporting arm and having a ?nger projecting through and en gaging the walls of said slots, means to move said lever in one direction to cause said ?nger to act upon one of the walls of said inclined slot to swing said button-holding lever into engagement with a button in said supporting foot, and means 40 to move said lever in the opposite direction to cause said ?nger to swing said button-holding lever out of engagement with said button, said slots and ?nger being so constructed and ar ranged as to lock said button-holding lever 45 against movement under the in?uence of said button. 11. A button-clamp comprising a supporting member, a button-support carried thereby, a ' button-holding member carried by said support ing member and cooperating with said button 50 work-plate, a button-clamp pivoted to said frame, support to hold a button, means to ‘move said means carried by said frame to tilt said button button-holding member into contact. with the clamp about its pivot, said button-clamp com prising a supporting arm, a button-supporting foot secured to said arm and provided with a button-shank receiving aperture, a work-sup port carried by said work-plate beneath said foot, button, and means to lock said button-holding member against movement under the in?uence of 65 the button. . 12. A button-clamp comprising a supporting member, a button-support carried thereby, a two part button-holding lever carried by said sup porting member and cooperating with said but 60 a button-holding arm pivotally mounted on said 60 supporting arm, means to ‘swing said arm into contact with a button to hold the shank thereof in the aperture in said foot, and means to ad ton-support to hold a button, means to move said button-holding lever into contact with the just the position of said button-holding arm ' button, means to lock said button-holding lever bodily relative to said supporting arm to com 65 pensate for variations in the thickness of but tons. 8. In a sewing machine having a frame, a but ton-clamp pivoted to said frame, means carried by said frame to tilt said button-clamp about its 70 pivot, said button-clamp comprising a support ing arm, a button-supporting foot secured to said against movement under the influence of the button, and means to adjust one part of said button-holding lever relative to the other part and to said button-holder to compensate for variations in thickness of buttons to be held in said button-clamp. MICHAEL McCANN.