US591383A - collins - Google Patents

Description

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J. T. COLLINS. OVEREDGB SEWING MACHINE.

Patented Oct. 12,1897.

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J.".T. OOLLINS." OYBREQGE SEWING MACHINE.

1 No. 591,383. Patented Oct 12, 1897.

UNITED ST T- s PATENT Fries;

JOHN T. COLLINS, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE MERROW MACHINE COMPANY, OF SAME PLACE,

'IOY/EREDGE SEWING-MACHINE.

SIPEOIFICATION rorniing m of Letters Patent No. 591,383, dated October 12, 1897.

Ap eal... fiia may 20, 1897. Serial No. 637,419. (No model.)

T0 at whom, it may concern.-

Be it known that I, JOHN T. COLLINS, a citizen of the UnitedStates, residing in the city and county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Overseaming-Machines; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the figures and; letters of reference marked'thereon, I I

Myimprovements relate to overseamingmachines, my object being to produce a new variety of overseam" or edge finish made from three threads, and this invention consists in new forms of devices and new combinations of devices and mechanism for producing said new overseam or finish.

Figure 1 is a front elevation of the machine. Fig. 2 is a left-hand elevation of the lower part of the machine, the door being removed to display the interior. I Fig. 3 is a top View of the left-hand portion of the machine with work-plate removed to display the interior. Figs. 4 '5, 6, 7, 8, and 9 are diagrammatical views illustrating various stages of the stitchforming operations.- Fig. 10 is an enlarged sectional top view of a portion of the secondthread looper. V I V I V Throughout the drawings forming a part of this specification similar letters and figures of reference indicate like parts.

A indicates the frame of the machine; B, the main shaft; C, the eccentric; D, the driving-pulley; E, the eccentric connection; F, the needle-lever; G, the needle-bar; H, the needle, and I the presser-foot.

The lower grooved cam a is attached to the main shaftB, and is provided with a gear a,

which meshes into a gear a attached to the upper grooved cam a which is operatively supported upon the upper shaft a in such a manner that both of the said grooved cams rotate together, causing the reciprocation and oscillation of the looper-carrier b, which is operatively'supported upon thesliding block b, which is adapted to reciprocate in a dovetail groove formedby gibs b b secured to the cap or door 5 All of the parts hereinabove specifically indicated by lettersof reference are similar in work-plate, which is made for convenient observation of the loop-forming process while adjusting the parts. 20 is the door covering the left end of the machine; 21, thefeed-dog, with'an opening forthe passage of the loopcarrier 1; 22, the feed-carrier; 23,- the feed,-

lever; 24, the feed-eccentric connection, and

25 the feed eccentric. Two. thread-carrying looping instruments in addition to the needle are employed in this machine, the one, 9,bein g adj ustably attached to and carried by the oscillating reciprocatory looper-carrier 19, controlled by the grooves in cams a a while the other looper 1 is adj ustably attached to a carrier 30, pivotally mounted upon a fixed stud or pin 31 and provided with an adjustable arm or pin 32, whose spherical head is received in a socket formed in one end of link 33, the opposite end of said link embracing a spherical crank-pin 34 on the main shaft B.

The path of looper 9 and the extent of its movement both above and below the workplate are determined by the forms of the two controlling cam-grooves. Its movements are performed in a plane parallel with the needle, or substantially so; while the looper 1 is given a substantially uniform reciprocating motion in a direction transverse to the axis of the needle, its path lying diagonal to the plane of the other loopers movement, so as to extend from on the rear side of the nee- .dles line of motion to the front side of the line of motion of the looper 9, as indicated in Fig. 2.

The looper 1 is provided with a point .10, adapted to enter between the side of the vertical needle and the thread carried thereby,

looper 1 is also provided with a slabbing or The second-thread 19 indicates the recess 12 to facilitate the passage of the point of the looper 9 between the side of the secondthread looper and the thread carried thereby, as will be further explained, and its operating portion is slightly inclined to the horizontal, the point being the more elevated.

The looper 9 is provided with an eye 13 for carrying the third thread, the said eye being preferably countersunk and provided with the usual grooves to facilitate the passage of the third thread, and it is preferably slabbed, as indicated at 14:, Figs. 2 and 3, for the passage of the vertical needle II between the side of the said looper and its thread above the fabric. The point 15 of the looper 9 is curved upward and forward or toward the second-thread looper l for the purpose of entering between the side of the latter and the thread carried thereby.

In order to explain the operations of the machine, it may be supposed that its motion has been arrested at a stage in the operation when the vertical needle is at or near its lowest point, at which time the needle, the two loopers and threads will be in relative positions, approximately, as illustrated in Fig. 4.

Upon starting up the machine the looper 1 advances toward the needle while the latter is rising, the point of said looper passing between the said needle and the thread carried thereby, while the looper 9 moves downward to carry its point below the line of travel of the looper 1, as illustrated in Fig. 5. As the needle continues its upward movement the second-thread looper 1 continues through the loop of needle-thread, carrying its thread doubled through the loop of needle-thread to a point beyond the edge of the fabric, while the third-thread looper 9 is moving to the position illustrated in Fig. 6. As the needle rises farther the third-thread looper 9 also rises, projecting its curved point between the second-thread looper 1 and the thread carried thereby, as shown in Fig. '7. The needle rising still farther, the second-thread looper 1 withdraws, while the third-thread looper 9 advances, carrying its thread doubled through the loop of second thread and beyond the path of the needle. In so doing the loop of second thread is raised above the edge of the fabric, but held back bysaid fabric and by the outer edge of the finger 16, as illustrated in Fig. 8. The second-thread looper continues to withdraw, the needle descends, passing down between the side of the third-thread looper 9 and the thread carried thereby, while the said third-thread looper is retracting, as shown in Fig. 9. The needle continues its downward movement through the fabric, the thirdthread looper withdraws, leaving its thread passing doubled through loop of second thread and around the needle, completing one full cycle of operations in forming stitches around the edge of the fabric. It will be observed that as the needle rises out of the fabric its thread is held below by the secondthread looper, as shown in Fig. (l, and that in the completed stitches the needle-thread or first thread extends doubled through a loop of third thread and the fabric, that the second thread extends doubled through a loop of first thread below the fabric, and that the third thread extends doubled through a loop of the second thread and around the doubled first thread above the fabric. The loops of three threads are thus bound together around the edge of the fabric, forming a finish or seam thereon, which is, so far as I am aware, new in the art, and will form the subject of a separate application.

It is of course understood that if desired the usual or any approved forms of tension and take-up devices may be applied to any one or more of the threads and that the workplate can be provided with the usual finger to support the edge of the fabric and to receive the stitches when no fabric is present.

Having thus described my invention, what I claim as new is- I 1. In an overseaming-machine such as described, the combination of a reciprocating thread-carrying needle, and two reciprocating tln'ead-carrying loopers, one of said loopers moving in a path transverse to the axis of the needle, to enter the loop of needlethread below the fabric, and the other looper moving transversely to the first-named loopers line of motion, to enter the loop of thread carried by the said first-named looper and deliver its loop in position beneath the necdle to be entered thereby as it penetrates the fabric.

2. In an overseaming-machine such as described the combination of the vertically-reciprocatin g thread-carryin g needle, the workplate, a thread-carrying looper reciprocating horizontally beneath the work-plate in proximity to the needle when below the workplate, to enter the loop of needle-thread, and a thread-carrying looper reciprocating vertically and horizontally in proximity to the Ipaths of the first-named looper and the needle, to enter the loop of thread carried by said first-named looper below the work-plate and carry its thread above the work-plate in position to be entered by the needle; substantially as described, whereby a loop of second thread will be carried through the loop of needle-thread, and a loop of third thread through the loop of second thread, said third-thread loop being confined by a second loop of needle-thread passing through it and the fabric.

3. In an overseaming-machine such as described, the eombination of the work-plate, the reciprocating thread-carrying needle, a thread-carrying looper reciprocating around or over the ed go of the work-plate in a plane substantially parallel with the ncedles path, and a horizontally-reciprocating thread-carrying looper moving below the work-plate in a path diagonal to the plane of the firstnamed loopers motion and extending from IIO a point in rear of the needle to a point in front of the first-named looper; substantially IO horizontally beneath the work-plate; and the thread-carrying looper 9 providedwith an entering-point, an eye and a recess 14:, said looper reciprocating around the edge of the work-plate from a point below looper 1 to a point above the Work-plate beneath the I 5 needle.

- J OHNT. COLLINS.

Witnesses: WINFIELD O. GRAHAM, ROBERT D. SMITH.

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