US1246794A - Sewing-machine. - Google Patents

Description

V. B. SNEAH. SEWING MACHINE. APPLICATION FILED mm. 1916.-

Patented Nov. 13, 191?.

3 SHEETSSHEET I.

V. B. SNEAD.

SEWING MACHINE.

APPLICATION FILED IIIAYII. I9I6.

1,246,794. Patented Nov. 13, 1917.

3 SHEETS-SHEET 3.

VINCENT B. SNEAD, OF WICHITA, KANSAS.

SEWING-MACHINE.

Specification of Letters Patent.

Patented Nov. 13, 1917.

Application filed May 11, 1916. Serial No. 96,884.

To all whom it may concern:

Be it known that I, VINCENT B. SNEAD, a citizen of the United States, residing at Wichita, in the county of Sedgwick and State of Kansas, have invented certain new and useful Improvements in Sewing-Ma chines, of which the following is a specification.

The present invention relates to sewing machines, and the object is to provide an inexpensive and simple mechanism of thls character, which is thoroughly practicable, and which is especially designed for sewing leather, such as harness, shoes and the like.

Primarily the device is intended for the use of farmers and artisans, but is of course not limited to such use.

An embodiment of the invention that has proven entirely practicable is illustrated in the accompanying drawings, wherein Figure 1 is a side elevation of the apparatus.

Fig. 2 is a plan view of the same.

Fig. 3 is a horizontal sectional view taken on the line 33 of Fig. 1.

Fig. 4 is a horizontal sectional view on the line 44 of Fig. 1.

Fig. 5 is a vertical sectional view through the frame head and bed.

Fig. 6 is a detail perspective view of the thread guide and catch.

Fig. 7 is a detail view in elevation of the presser or feeder foot support.

Fig. 8 is a detail sectional vlew on the line 8-8 of Fig. 1.

Fig. 9 is an end elevation of the head of the machine illustrating the arrangement of the thread thereon, and

Fig. 10 is a view in elevation of the rear side of the actuating cam wheel.

Similar reference numerals designate corresponding parts in all the figures of the drawings.

In the embodiment illustrated, the frame includes a bed 11, having a suitable arm 12 overhanging the same, said arm terminating at its free end in a vertical head 13. In this head is located a vertically reciprocating needle holder 14 that extends above the head, and is provided with an eye 15 to receive the thread that is engaged with the needle, said thread being brought from a suitable spool, as 16 mounted on a spindle 17 carried by the arm 12. The ne r 4 i procated by a lever 18 fulcrumed between its ends on a bolt 19 that is fixed in the frame arm 12, one end of the lever being slotted, as shown at 19 to receive a bolt or pin 20 that is engaged with the needle bar 14. The other end of the lever is provided on one side with a roller 21 engaged in a cam groove 22 formed in the rear side of an operating wheel 23. This wheel, as shown at 24, is journaled on the frame arm 12 contiguous to its juncture with the bed 11, and said wheel is provided on its outer side with asuitable handle knob 25.

A presser or feeder foot support is also mounted in the head 13. This support consists of a vertical bar 26 having at its lower end an enlargement 27 that surrounds the lower portion of the needle bar 14, and has rotatably supported thereon, a collar 28. The collar 28 is normally held against rotation by a set screw 29 threaded therethrough and engaging the enlargement 27. The presser or feeder foot is designated 30, and is detachably mounted by a set screw 31 on the lower end of the arm 32 secured to a yoke 33 that embraces and is pivoted to the opposite sides of the collar 28, as shown at 34. The under face of the foot 30 is roughened, as shown at 35, said roughened surface cooperating with the adjacent face of the bed, as will be evident. A coiled spring 36 surrounds a portion of the arm 32, its lower end bearing against a shoulder 37 formed thereon, and its upper end bearing against a guide 38 fixed to the collar 28. The action of this spring is limited bya stop pin shown at 39, which is carried by the arm 32 and engages the upper face of the guide 38.

The vertical movement of the support 26, and consequently of the presser or feeder foot 30 is secured by means of a lever 40 fulcrumed between its ends on the bolt 19, said lever having one end engaged beneath a projection 41 formed upon the bar 26, the other end of the lever having on one side a roller 42 which is engaged by a cam extension 43 projecting beyond the rear face of the operating wheel 23. It will thus be evident that during the greater part of the movement of the cam wheel 23, the lever 40, and consequently the support and presser foot, are stationary, but when the cam portion 43 engages the roller 42, there will be a quick upward and downward movement of the support and the presser foot. A spring 4 1, shown in Fig. 5, bearing upon a projection to of the bar 26, serves to again depress the support and presser foot after its release by the cam portion 43.

Located directly above the enlargement 27 of the support 26, is a circular plate or disk +16, through which the needle bar 14: passes, said plate being carried by a vertical bar i? also slidably mounted in the head 13 and engaged by one arm of a lever 48 fulcrumed upon the bolt 19, and having an offset portion 49 located beneath the lever 18. In this offsetportion is adjustably, threaded a screw 50, the upper end of which is disposed in the path of the lever 18, so that when the rear arm of the lever 18 is depressed, the rear arm of the lever 48 will likewise be moved, thus elevating the plate 16. The upper end of the presser foot bar 32 has an offset projection 51 that normally rests on the plate 16, and consequently when the said plate is elevated, the presser foot will be swung so as to cause a feeding movement, this movement taking place against the action of the spring 36.

Briefly described, the operation of this portion of the mechanism is as follows: Assuming the parts in the position shown in Fig. 1, if the cam wheel 23 is turned to the right, the first action will be the elevation of the needle, and when said needle is raised and about reaches the upper end of its stroke, the lever 18 will strike the screw 50, thereby causin the elevation of the plate as. This movement of the plate will cause the presser or feeder foot 30 to be swung, and thereby effect feeding operation. The needle then descends and passes through the work, and while in its lowermost position, the lever 18 will be operated, thereby raising the support 27 and the foot 30. As soon as the said foot is elevated above the work, the spring 36, which has been compressed by the elevation of the plate 46, will react and cause the foot to reassume its normal position, or in other words, said foot will then be located for a repetition. of the operations above described.

Referring now more particularly to Fi 3, there is illustrated a shuttle 52, which is detachably mounted in the hollow bed of the machine, but when in position, is substantially stationary. In this shuttle is located a rotatable bobbin 53 of any desir able form, said shuttle and bobbin being located at one side of the opening 54, through which the needle operates. Located in the rear portion of the bed is a horizontally reciprocating bar 55 connected by a link 56 to the upper end of a swinging arm 57 that is pivotally mounted at its lower end, as shown at 58, Fig. 1, to the bed of the machine below the actuating wheel 23. The pivot 59, co necting the 56 and arm 57, has journaled thereon a roller 60 which operates in the cam groove 22 and consequently as the wheel 23 is turned, it will be evident that the bar 55 is longitudinally reciprocated. Pivoted as shown at 61 to the front end of this bar 55 is a bar 62 terminating at its free end in a thread engaging book 63 that is thus carried by the bar past the needle when said needle is in its depressed position. The front wall 63 of the bed constitutes a guide for the hook, and it is yieldingly held against said guide by spring 64 adjacent to the pivot 61. The bar 62 is provided with an outstanding pin 65 that is located adjacent to the periphery of the operating wheel 2o and this periphery is provided at one point with a cam enlargement 66 that is arranged to engage the pin ('35, and thus swing the hook from the full line position shown in Fig. 3 to the dotted line position.

Arranged on the side of the shuttle 52, opposite the needle, is a thread guide 67 in the form of a curved plate secured at one end and terminating at its other end in a substantially V-shaped portion 68, this portion being divided into two prongs 69 forming an inwardly tapering throat with shoulders 70 at the inner end thereof. A weighted retaining deg 71 is pivoted to the upper of the prongs, and normally lies across the throat. The detail structure of the device is shown in Fig. 6. The arrangement is such that when the hook swings to the dotted line position in Fig. it will pass through and swing the throat between the prongs, the dog 71 to one side; af er its passage, said dog will return to its normal position.

The operation of this mechanism is substantially as follows: When the needle is depressed, the thread carried thereby is caught by the hook 63 and withdrawn to substantially the position shown in Fig. 3. The cam (36 then engages the pin 65 and swings the hook with the thread therein to the position shown in dotted lines in Fig. 3. The loop in the thread engages behind the shoulders 70 and when the hook returns, it becomes disengaged therefrom. Consequently when the needle rises, the slack in the thread is drawn out by the arrangement shown in Fig. 9, and the drawing out of this slack causes the thread to be drawn around between the shuttle and the thread guide 67, causing a lock stitch to be produced.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, with out further description, and it will be understood that various changes in the size, shape, proportion, and minor details of construction, may be resorted to without departing from the spirit or scope of the invention.

What I claim as new, and desire to secure by Letters Patent, is

1. In a sewing machine, the combination with a shuttle, of a needle operating adjacent to one side of the same, a thread engaging device operating transversely of the needle and having a reciprocatory and a swinging movement, to carry the needle thread about the shuttle, means for operating said device, and means on the opposite side of the shuttle to the needle for disengaging the thread from said carrying device and directing it around the shuttle.

2. In a sewing machine, the combination with a shuttle and a needle operating adjacent thereto, of a reciprocatory bar, a 1'0- lary actuating device including a cam for reciprocating the bar, a swinging thread engaging hook pivoted to the bar, and a cam on the rotatable actuating device that swings the hook when the same reaches a predetermined position.

3. In a sewing machine, the combination with a shuttle, of a needle operating at one side of the same, a thread guide on the op posite side of the shuttle having a bifurcated portion provided with internal shoulders, a dog extending across the bifurcated portion, and a thread carrier hook operating between the needle and guide and passing through the bifurcated portion 4. In a sewing machine, the combination with a shuttle and a needle, of a member having a back and forth movement, a thread carrier mounted on the member and movable therewith toward and from the needle, said carrier being also capable of swinging with respect to the member, means for moving the member and carrier together toward and from the needle, and means for swinging the carrier with respect to the member.

5. In a sewing machine, the combination with a shuttle and a needle, of means for,

causing a loop from the needle to be passed around the shuttle, said means including a reciprooatory bar, a thread carrier hook pivoted to the bar, and a rotatable actuating inember having means for causing the bar and hook to be bodily moved toward and from the needle and also having means for swinging the hook with respect to the bar.

6. In a sewing machine, the combination with a shuttle and a needle, of means for causing a loop from a needle to be passed around the shuttle, said means including a reciprocatory bar, a thread carrier hook pivoted to the bar, a pivotally supported arm, a link connecting the arm and reciprocatory bar, an operating wheel having a connection with the arm and link to reciprocate the bar, and a peripheral cam having an intermittent engagement with the swinging hook to cause its swinging movement.

7. In a sewing machine, the combination with a needle, of an actuating device therefor, a shuttle, a loop forming member for causing the thread from the needle to be passed around the shuttle, an actuating device for the member, and a rotatable member having a single cam portion engaging both the needle and loop forming member actuating devices for operating the same.

8. In a sewing machine, the combination with a needle, of an actuating lever therefor, a shuttle, a reciprocatory and-swinging looper hook coacting with the needle to cause a loop to be passed around the shuttle, a rotatable actuating wheel having a cam groove in one face, actuating devices for the needle lever, a loop forming member en gaged in said groove, and means carried by the wheel for causing the swinging movement of the loop forming member.

In testimony whereof, I affix my signature in the presence of two witnesses.

VINCENT B. SNEAD.

WVitnesses:

EARLE R. MOONEY, JOHN MALONEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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