US1394075A

US1394075A - Sewing-machine

Info

Publication number: US1394075A
Application number: US124531A
Authority: US
Inventors: John S Finch
Original assignee: Singer Co
Current assignee: Singer Co
Priority date: 1916-10-09
Filing date: 1916-10-09
Publication date: 1921-10-18
Anticipated expiration: 1938-10-18
Also published as: FR491193A

Description

J. S; FINCH. sswmc MACHINE. A1PL|CATION FILED OCT. 9. 1916- Patented Oct. 18, 1921.

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APPLICRTION FILED OCT. 9, I916. v

Patented Oct. 18, 1921.

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v SEWING MACHINE. APPLICATION FILED OCT. 9. I916. 1,394,075. 1 Patented Oct. 18, 1921.

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SEWING MACHINE. APPLICATION FILED OCT. 9,1916- 1 ,394,075. Patented Oct. 18, 1921.

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WITNESS Q I IIVI/EIVTOIR I f0/Z771/5E7L0/Z. 4. 45-

A TTOR/I/IFI UNITED STATES,

PATENT OFFICE.

JOHN S. FINCH, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR, TO THE SINGER MANU- FACTURING COMPANY, A CORPORATION OF NEW JERSEY.

SEWING-MACHINE.

Specification 01' Letters Patent.

Patented Oct. 18, 1921.

2 Application fi1ed October 9, 1916. Serial No. 124,531.

T 0 all whom it may concern:

Be it known that I, JOHN S. FINcH, a citizen of the United States, residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in sewing machines and has for its object to improve that class of machines employed for stitching embroidery figures or designs and is herein shown and described as employed in the stitching of eyelet-holes of a design common to, so termed, hiadeira embroidery wherein the manipulation of the fabric under the needle may or may not be controlled by the operator, the last of the stitches comprising the completed figure consisting of tying stitches through means which, after the placing of the latter stitches, automatically brings into action the stop-motion mechanism to arrest the action of the ma chine.

Referring to the drawings which form a part of the specification, Figure 1 is a view in front side elevation of the present improved construction, partly in section, to better illustrate the means employed for placing the tying stitches and for arresting the action of the machine. Fig. 2 is a view in rear side elevation of Fig. 1. Fig. 3 is a top plan view of the previous figures. Fig. 4 is a view in front end elevation of the previous figures with the arm-cap removed. Figs. 5 and 6 are detail views later to be referred to. Fig. 7 is a view partly in full lines and partly in section of the clothpresser mechanism. Fig. 8 is a view of the arm face-plate. Fig. 9 is a detail later to be referred to and Fig. 10 is a View of a fabric provided with an eyelet opening, a partly completed and a completed eyelet.

As the stitch-forming mechanism employed in the present construction is common to many varieties of Singer commercial sewing machines only such reference will be made to the elements comprising such mechanism as is thought important to an understanding 'of the application of the present invention.

Referring to the figures, 1 represents the bed-plate upon which is mounted the bracketarm comprising the arm-bracket 2 and armstandard 3, 4; the main or needle-bar driving shaft carrying at its forward end the shaft flange 5 connected with the needle-bar 6 by the needle-bar driving link 7 and 8 the needle. 9 denotes a belt-pulley carried by the main-shaft and having driving relationship, through the belt 10, with the pulley ll carried by the loop-taker actuating shaft 12 provided with the loop-taker 13 into which is journaled the bobbin-case 14: provided with a mass of under thread 15, the ratio of said pulleys being as one to two, thus giving to the loop-taker two rotations to one complete actuation of the needle-bar.

16 represents a gear member fast on the main-shaft and meshing with a gear member 17 fast on the needle vibrating shaft 18 journaled in suitable bearings carried by the arm-bracket, the ratio of said gears being as one to two, thus giving to the shaft 18 one rotation to two rotations of said main-shaft. 19 denotes an eccentric carried by said needle" vibrating shaft and upon said eccentric is journaled one end of. an eccentric connection 20 whose lower end is provided with a. bearing 21 into which is journaled the hub 22 of the needle vibrating link 23, the opposite end of the latter being provided with a bearing 24 into which is journaled an eccentric 25 formed integral with the graduated cylinder 26 provided with a knurled rim 27, the eccentric 25 beingjournaled on a stud 28 passing loosely through said eccentric and secured by screw 29 into a suitable opening formed in the needle vibrating frame 30, into which latter is mounted to move vertically the needle-bar 6, said frame being suspended upon a fulcrum-stud 31 secured in the head of the arm 2. 32 denotes a pocket formed in the link 23 into which is mounted a spring 33 confined between the screw 34 and sliding follower 35 tracking the outer surface of the eccentric 25, said follower acting to frictionally hold the latter against accidental movement on the stud 28. 36 denotes an index finger secured by screws, as 37, tothe link 23 to indicate, through the adjustment of the eccentric 25, the operative relationship of the needle with respect to the axis of the eyelet spur 38 re movably secured on the cloth-plate 39 which in turn is suitably secured in the bed-plate 1. 4C0 denotes a pin secured in the eccentric 25 which coacts with the stop walls, as ll, formed on the link 23, to limit the adjustsaid shaft being reduced to receive a sleeve 48 journaled in a bearing 49 forming a part of a bracket 50 secured by screws,'as 51, to

the head of the arm-bracket2, said shaft being held against.endwisemovement by the attached collar 52 and operating crank-arm.

53 secured by-screw 54, the freeend of said crank-arm being connected. with an operatingrod 55 whose lower end is attached to oneend of an operating rock-arm 56 journaled on a stud57 secured in a bracket 58 depending from the bed-plate, the opposite, p end of the rock-arm being held by a spring 59 in contact with the head 60 of a starting rod 61 manually operated from a suitable treadle (not shown) in a manner common to sewing machines generally.

The stop-motion mechanism herein employed is of common construction except in the matter of added connections to adapt it to the present sewing machine construction, and only such reference will be made to the common elements as will be necessary to clearly point out their operative relationship to the present improved means.

62 represents a stop-frame mounted to oscillate on the pintle screws,.as 63, threaded into a bracket 64 suitably secured to the standard 3, and into said frame is mounted to move vertically a stop rod 65 normally held elevated by a spring 66, the, upper end 66 of said rod, when moved into the path of rotation of the stop cam 67, acting to arrest the action of the machine, as in earlier stop-motion constructions of like design.

Upon the sleeve 48 is suitably secured a link adjusting crank-arm 68, the free end of j which has pivotally connected to it one end of a link adjusting connection 69 whose opposite end is pivoted to a connection crank 70 fast on a short shaft 71 carrying a link crank 72 pivotally connected at its outer end by a stud 73 to alink 74 provided at its opposite end with a hub 75 journaled in the hub 22 of the link 23. lVhen the axis of stud 73 is placed in alinement with the axes of the short shaft 71 and pin 28 whereby the links 72 and 74 are substantially parallel in the central position of link 74 there'will be substantially no swinging movement of the needle vibrating frame 30, but when the axis of stud 73 is moved out of such alinement,

as more plainly illustrated in Fig. 4, the eccentric connection 20, through the link 23, will transmit to said frame vibratory'movement, thus causing the needle to be moved laterally, as in the stitching of a zigzag seam.

, Upon the sleeve '48 is secured by screw 76 an indexing lever 77 which when moved by the spring 78, through the rocking movements of the shaft 43, into contact with the stop-screw 79, registers the axes of the short shaft 71, stud 73 and pin 28 in alinement, 7

of said alinement, thus effecting stitch-V forming movements in different, vertical paths, the adjustment of the stop-screw .80 determining the amplitude of lateral movement of the needle. 81 denotes an index pointer secured by screws, as 82, to the indexing lever 77, said pointer and the index '83, on the arm face plate184, making convenient the adjustment of the stop screw 80. to effect the desired amplitude of lateral,

movement of said needle. 7 85 denotes a spring mounted on-the shaft 43 which acts in opposition to the manual manipulation of the rod 55.

86, represents a lead nutrock-shaft carrying at one end a lead nut crank-arm 87. and

at its opposite end alead nut carrying arm 88 upon the inner end ofwhich is secured by screw 89 a lead nut 90, the free end 91 of the crank-arm 87 being acted upon by the wall:

92 of the cam-fiange 93 formed on the collar 94 suitably secured on the-shaft 43, in opposition to the resiliency of the spring 95, to hold said lead nut out of engagement with the spirally'threaded sleeve 96 mounted on the main-shaft 4 during the placing of-the overseam stitches about the eyelet. The sleeve 96 is secured by the key 97 in a suitable key way to turn withthe shaft 4 but free to be moved in the direction of its length by the resiliency of and in opposition to the spring 98 confined between the end of said threaded sleeve and a collar 99 suitably secured on said main-shaft, the extent of the lengthwise movements .of said sleeve being controlled by the adjustment of the stop collar 100 relatively to the lead nut 90.

101 represents a catch lever rock-shaft journaled in suitable bearings formed in the arm-bracket and at its inner. end provided with a tripping lever 102 and at its opposite end with a. catch lever103, the free end of the latter having adjustably secured to ita catch finger 104 provided with a notch 105 engaging a screw 106 threaded into an arm 107 carried'by the swinging frame 62 to hold, through manual control, thestop-rod 65 out of engagement with the stop-cam 67 untilthe completion of the overseam stitches, at which time the lead nut 90 is caused to track the spiral threads of the sleeve 96 until the fiange 108 is-moved into contact with V the tripping lever 102 when,

through'the elements

101, 103 and 104, the screw 106 is released from engagement with the notch 105, thus permitting the spring 109 to move the uper end of the stop-rod 65 into engagement with the stop-cam 67. When the stop rod frame 62 is moved by the spring 109 to cause the stop-rod to engage the stop cam the arm 110 carried by the frame 62 acts, through the connection 111, to rock the two arm lever 112 on its fulcrum 113, thus causing the lipped end 114 to contact the lug 115 carried by the presser-bar 116 and raise the cloth-presser 117 above the fabric.

When it is desired to start the machine the operator through the connections pointed out rocks the shaft 43 which, through its attached crank arm 11 8, moves downward the pivotally secured connection 119 a distance sufficient tobring the upper wall 120 of the slot 121 in contact with the shouldered screw 122 and move downward the arm 123 forming a part of the frame 62, thus rocking the frame to its inoperative position, as shown in Figs. 1 and 2, where it is held by the operator until the completion of the overseam stitches, when the manual control is discontinued and taken up by the mechanism for placing the tying stitches. The present driving mechanism includes the commonly employed tight and

loose pulleys

124 and 125 respectively, and belt shifting arm 126.

In the figures the machine elements are shown in the positions which they occupy at the completion of the stitching operation or in position to cause the flange 108 of the spirally threaded sleeve 96 to act on the tripping lever 102 to, through the unlatching of the catch finger 104, cause the stopping mechanism to arrest the action of the ma chine. V

Presupposing the elements as occupying their positions of rest and the presser-foot elevated, the sequence of movements necessary to a complete cycle of operation is as followsthe cloth a is held tightly stretched in an embroidery hoop with the eyelet perforations as b punched therein and placed beneath the presser-foot with the eyelet spur in a perforation when, through the manual manipulation of the treadle (not shown), the machine is started, which effects a downward movement of the rod 55 and a rocking movement of the shaft 43 in opposition to the spring 85 in the direction indicated by the arrow 5, thus causing the connection 119 to, through the arm 123, rock the stop rod out of engagement with the stop cam 67 and shift the driving belt (not shown) upon the tight pulley 124 and allow the presser-foot to be moved by the spring 127 down upon the fabric.

Coincident with the starting of the machine the cam-wall 92 of the collar 94 acts on the crank-arm 87 to, through the connections pointed out, disengage the lead nut 90 from the sleeve 96 and allow the spring 98 to seat the flange 108 against the collar 100, such oscillatory movement of the shaft 43 causing the spring 78 to place the index lever 77 carried by the sleeve 48 into engagement with the stop screw 80, where it remains during the overseaming of the eyelet, at the same time the crank arm 68 fast on said sleeve is rocked to, through the connections pointed out, adjust the crank 72 and link 74 to effect overedge stitches as 0, the relationship of said stitches with respect to the axis of the eyelet-spur 38 being controlled by the adjustment of the cylinder 26, thus effecting a relative adjustment of parts for placing the overseam stitches.

After the required number of overseam stitches have been placed, as represented by 0, the manual control is discontinued and the shaft 43 allowed to effect its return rocking movement which causes the connection 119 to be moved vertically, for which purpose the slot 121 in said connection is provided, and the free end of the crank-arm 87 to be positioned off the cam-flange 93, as shown in Fig. 5, thus allowing the lead nut to engage the spirally threaded sleeve 96, the pin 128 in the shaft 43 to contact the wall 129 in the sleeve 48 and move the indexing lever 7 7 in engagement with the stop-screw 79, and coincident therewith rock the crank-arm 68 and through the connections pointed out adjust the crank 72 and link 74 to hold the frame 30 against vibration, thus positioning the parts to effect the superposed tying stitches (Z which form of stitches are con tinued until the flange 108 operates the tripping lever 102 permitting the stop mechanism to be brought into action to stop the machine.

Having thus set forth the nature of the invention, what I claim herein is 1. In an embroidery machine, the combination with a stitch-forming mechanism including a main-shaft, of means under the control of the operator during the operation of the machine for effecting stitch-forming movements of the needle in separate paths for an indeterminate period and for continuing the stitch-forming movements of said needle in a single path, and automatically controlled means for arresting the action of the machine at the completion of the single path cycle of operationf 2. In an embroidery sewing machine, the combination with a stitch-forming mechanism including a main-shaft, of means under the control of the operator during the operstitch-forming movements in a given path and automatically controlled means for de termining the number of said latter stitches during a single cycle of operation.

3. In an embroidery sewing machine, the

mine the number of said latter stitches during asingle cycle of'operation.

4. In an embroidery sewing machine, the combination with a stitch-forming mechanism including a main-shaft, of means un-' der the control of the operator for effecting stitch-forming movements of the needle in separate paths for an indeterminate period,

' and connections between the manually controlled means and said main-shaft for effecting stitch-forming movements in a given path, the means for effecting the latter stitches acting to automatically arrest the the cycle of operation.

5. In an embroidery sewing machine, the combination with a stitch-forming mechanism including a main-shaft, of means unaction of the machine at the completion of 'der the control of the operator for eifecting stitch-forming movements of the needle in separate paths for an indeterminate period, and connections between the manually controlled means and said main-shaft for eil'ecting stitch-forming movements'in a given path, the means for effecting the latter stitches acting to automatically arrest the action of the machine and raise the presserfoot at the completion of the cycle of operation.

6. In a sewing machine, the combination 7 with a stitch-forming mechanism and means for actuating the latter, of means for effectng a cycle of seam-formation comprising overedge and tying stitches, said means in-;

cluding a two-part rock-shaft manually controlled to change the character of the stitch, and automatically controlled means for arresting the action of the machine at the completion of the tying stitches.

7. In a sewing machine, the combination of a stitch-forming mechanism for producing an endless seam comprising overedge and tying stitches including a Presser-toot and a two-part rock-shaft controlled to change thecharacter of the stitches at the will of the operator, together with means for auto matically arresting the action of the machine and elevating the presser-foot at the completion of the tying stitches.

.8. In a sewing machineflthe combination with a stitch-forming mechanism and means for actuating the latter, of means for effecting a cycle of seam-formation comprising overedge and tying stitches including a twopart rock-shaft, one section of which is resiliently and the other positively actuated, the latter section manually controlled to'change the character of the stiches during the stitching operation, together with means for automatically arresting the action of the machine the completion of the tying stitches.

9. In a sewing machine, the combination with a stitch-forming mechanism including a needle for effecting a cycle of seam-formation comprising overseam and tying stitches, and automatically controlled means for discontinuing said seam-formation, of a twopart rock-shaft one section of which is resili ently and the other positively actuated, the

latter section being manually controlled to change the character of the stiches at the willof the operator and the former section provided with an indexing lever coacting with a stop-member to determine'the amplitude of movement of theneedle.

10; In a sewing mach1ne,'the combination with a stitch-forming mechanism for working eyelets including a needle, an eyeletspur and a main-shaft,of meansiincluding a needle vibrating shaft'actuate'd from said main-shaft and connection between said latter shaft andthe needle for giving to the latterstitch-formin movements in first one and then the other of two separate paths, said connections including an adjustably mounted eccentric to determine the field of action of said needle with respect to the axis of said eyelet-spur, and a manually controlled two part rock-shaft, one section of which is positively and the other resiliently actuated, the latter section being provided with an indexing lever cooperating with a stop member for controlling the amplitude of lateral movement of said needle.

11. Ina sewing machine, the combination with a stitch-forming mechanism including a needle, an eyelet-spur and a main-shaft,

of means including a needle vibrating shaft actuated from said mam-shaft and connec tions between'said latter shaft andthe needle for giving to thelatter' stitch-forming movements in first one and then the other of two separate paths, said connections including an adjustably mounted eccentric to determine the field of action or" said necdle with respect tothe axis of said eyelet-spur, and a manually controlled two part rock-shaft one section' of which is positively and the other resiliently actuated, the latter section being provided with an indexing lever cooperatin with a stop member for controlling the amplitude of lateral movement of said needle and connections between said resillently actuated shaft section and the needle including a link, a link-crank and a link adjusting crank-arm, the ad justment of the latter acting on said linkcrank to change the character of seam-formation.

12. In a ewing machine, the combination with stitch-forming mechanism including a reciprocating needle and means for re ciprocating the same, of manually controlled means for effecting an undetermined number of stitch-forming movements of the needle in different paths, and for effecting a predetermined number of stitch-forming movements of the needle in a single path, such manual control being efi'ected during the continued operation of the machine, and automatically controlled means for terminating the duration of the latter stitching operation.

18. In an embroidery sewing machine, the combination with a stitch-forming mechanism including a main-shaft, of automatically controlled means for terminating the cycle of seam formation, manually controlled means for giving to the needle an undetermined number of stitch-forming movements in different paths and connections between said manually controlled means and said main-shaft for giving to the needle a predetermined number of stitch-forming movements in a given path.

14. In a sewing machine, the combination with an actuating shaft, a swinging needlebar frame, a needle-bar reciprocally mounted in said frame, and a needle carried by said needle-bar, of operative connections intermediate said actuating shaft and said needle-bar frame for laterally vibrating said needle-bar including a link, and an eccentric connecting said link with said needle-bar frame whereby the field of action of said needle-bar may be adjusted without changing the operative relationship of said connections.

15. In a sewing machine, in combination, a needle-bar, a needle carried by said needle-bar, an actuating shaft, operative connections between said actuating shaft and the needle-bar for reciprocating and laterally vibrating the needle, and manually controlled means for rendering inoperative the connections for laterally vibrating said needle, said manually controlled means including a vibratory arm having a range of movement determining the character of the titches, and an index finger carried by said vibratory arm indicating the lateral throw of the needle.

16. In a sewing machine, in combination, a needle-bar, a needle carried by said needle-bar, an actuating shaft, means operated from said actuating shaft for reciprocating said needle-bar in separate paths to form zigzag stitches and in a single path to form tying stitches, an index-finger having an adjustable range of movement for indicating the length of said zigzag stitches, a rock-shaft having a resilient connection with said index-finger, and manually controlled means for operating said rock-shaft and de termining the character of the stitches formed.

17 In a sewing machine, the combination with a needle-bar, a needle carried by said needle-bar, and an actuating shaft, of means operated from said actuating shaft for re: ciprocating said needle-bar in separate paths to form zigzag stitches includnig a rock-shaft, a link, a link-crank forming a movable fulcrum for said link, an adjustable eccentric connection between said needle-bar and said link for determining the field of zigzag stitch formation, an operative connection between said rock-shaft and said link, and an operative connection between said actuating shaft and said rock-shaft.

18. In a sewing machine, the combination with a needle-bar, a needle carried by said needle-bar, and an actuating shaft, of mans operated from said actuating shaft for reciprocating said needle-bar in separate paths to form zigzag stitches including a rock-shaft, a link, a link-crank forming a movable fulcrum for said link, an adjustable eccentric connected with said link for determinin the field of zigzag stitch formation, an index-finger having an adjustable range of movement for indicating the length of said zigzag stitches, opertaive connections between said index finger and said link-crank, and manually controlled means for effecting the discontinuance o1 zigzag stitching and instituting the formation of tying stitches.

19. In a sewing machine, in combination, a needle-bar, a needle carried by said needle-bar, an actuating shaft, operative connections intermediate said actuating shaft and the needle-bar for reciprocating and laterally vibrating the needle, and manually controlled means for rendering inoperative the connections for laterally vibrating the needle, including a vibratory arm, adjustable stops for said arm, and a resilient support for said arm.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses.

JOHN S. FINCH'.

Witnesses:

F. W. CUTTING, A. H. Boss.