US1088339A - Sewing-machine. - Google Patents

Description

J. O. GOODWIN.

SEWING MACHINE.

APPLICATION FILED NOV. 27, 1911. 1,088,339. Patented Feb. 24, 1914,

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Patented Feb. 24, 1914.

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lbllllliLhnF J. G. GOODW'IN.

SEWING MACHINE.

APPLICATION FILED NOV. 27, 1911.

Patented Feb. 24, 1914.

3 SHEETS-SHEET 3.

Vi /i266)? fizyelzfor: Je'ew a Goody/1'10 .UNITED STATES PATENT OFFICE.

JULIUS C. GOOD'WIN, OF PHILADELPHIA, PENNSYLVANIA.

SEWING-MACHINE.

To all whom it may concern:

Be it known that I, JULIUS C.- GoonwiN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification.

My present invention relates to improvements in sewing machines adapted to form a seam for uniting and covering the edges of two fabrics at one operation, such for instance as the seam forming the subject matter of Letters Patent issued to me December 12, 1911, No. 1,011,186. My improvements in the present case relate to mechanism for forming such a seam which is characterized by a longitudinal line of stitches intersected by cross-barson the upper sur-' face of the fabric and a similarly disposed longitudinal line of loops on the under surface of the fabric intersected by transverse loops.

The object of my invention is to produce a simple and effective spreader for the upper thread carrying mechanism together with mechanism for operating the same which will be reliable in its action at all times particularly when running at a high rate of speed.

A further object of my invention is to construct the spreader and its connections so that the same may be raised and lowered as the resser-foot is raised and lowered without disconnecting any of the spreader mechanism.

In carrying out my invention I employ only such movable parts as will be positive in their operation thus rendering the mechanism nearly free from lost motion such as would tend to set up unnecessary vibrations. The movable parts of the device are at once simple and durable in constructions and well adapted to meet the present demand for a high speed power driven sewing machine suited to a special class of factory work.

As the construction and operation of sewing-machines are now well known I have omitted as far as possible the lower stitch forming mechanism and have illustrated and will proceed to describe such parts only as are immediately concerned with my present improvements.

The various features of novelty which characterize my invention are pointed out Specification of Letters Patent.

Application filed November 27, 1911.

Patented Feb. 24, 1914. Serial No. 662,545.

forms in which my invention may be embodied.

Referring now to the drawings: Figure 1 illustrates a side elevation of a' sewing machine embodying my invention. Fig. 2 represents a sectional plan view, the section being indicated by the dotted line 22' in Fig. 1 and Figs. 3 and 4 are detached perspective views showing two positions of the spreader. As shown in the drawings my invention is preferably used in connection with a sewing machine of the type employed in forming the so called elastic or chain stitch. It should be stated, however, that my improvementsmay be employed in connection with other types of sewing machines without departing in any way from the principle of my lnvention.

In the drawingsz-A, indicates the bedplate of the machine which as shown in Fig.

1, is provided with bearings A A to'support a main shaft B. The driving shaft B is provided with a hand wheel B a-grooved driving pulley B and eccentrics B and B, which latter transmit motion directly to a spreader mechanism as will be hereinafter described. Extending upward from the bedplate is a curved arm A which constitutes a portion of the fixed frame of the machine and is provided with bearings A and A to guide a vertically reciprocating needle-bar C. The needle-bar is operated by an eccentric B fastened to the shaft B, at a point adjacent to the driving ulley B Motion is transmitted to the needle-bar by an eccentric lever B, connected by a ball and socket joint B to the short arm 13, of a curved lever B, which in turn is connected by a link 13 to a sleeved connection B on the needle-bar. The lower end of the needle-bar C is provided with a collar C provided with suitable openings to receive needles C and C Arranged in line with the needle bar C, is a presser-bar D, provided with a a poirt I), while the other bears upon a pin formed integral with a sleeve 1), and fastened to the presser-bar.

As shown in Fig. 1, the tension of the spring I) may be increased or diminished by means of a thumb screw D which is threaded to a projection on the frame of the machineainl bears directly upon the spring.

As the lower stitch forming mechanism or loopcr mechanism forms no part of the present invention it is not thought necessary to describe the same except in a general way. For convenience of illustration I have indicated by dotted lines in Fig. 1 the conventional looper mechanism employed in well known machines of this type in which a loopcr lever E, carrying a curved looper E is caused to oscillate upon an axis E by a connecting rod E interposed between a depending portion 1) of the arm B and the head of the looper lever E. Other mechanism heretofore suggested for a similar purpose may be employed in lieu of the looper mechanism just mentioned such for instance as the mechanism shown and described in Letters Patent No. 909,081, dated January 5, 1909.

The spreader mechanism which constitutes the essential feature of my invention, comprises a horizontally disposed spreaderrod F to which is adjustably secured the collar F of a spreader-arm F the latter having an opening to receive a spreader F. The spreader F is provided at its lowermost portion with a finger 7, adapted to carry the thread of the needle 0*, beyond the path of the needle C The spreader-rod F is journaled in bearings F and F the former being pivoted to an arm F", which is carried by a rod F,

controlled by the presser-bar D, and the latter being pivoted to a projection A, connected to or forming part of the frame of the machine.

The means employed to operate the spreader-rod F comprises the eccentric B, which is provided with a'pitman G, connected by a ball and socket joint G to an arm G fastened to the spreader-rod F. A plate 9 located near the end of the arm G serves to prevent the pitman from turnin By tfie means just mentioned the spreaderrod is given an oscillatory or rocking motion in its bearings which directs the finger of the spreader into and out of the path of the needles C and C While the oscillatory motion is being imparted to the spreader-rod the same must be given a reciprocating motion in its hearings in order that the finger of the spreader may carry a thread of the needle G into the path of the needle C and this motion is obtained in the following manner Loosely journaled on the spreader-rod F is a sleeve H, guided between collars II and H and provided with a boss H, to which is connected by links H, II a bell crank lever H. The bell crank lever H", is pivoted to a stud H, formed on the lower frame work of the machine and has a short arm It, coupled to an angular link H, which is connected by a ball and socket joint II to an eccentric lever 11, controlled by the cam B". By the mechanism just-described the spreader-rod F and spreader F have imparted to them a reciprocating motion. By the joint action of the mechanism described for producing simultaneously a reciprocating motion and an oscillatory motion of the-sprcader-rod and spreader, the finger of the spreader is caused to travel in a path somewhat elliptical. By this means the thread carried by the needle C is caught up by the finger of the spreader and carried in the form of a loop slightly beyond the path of the needle C, permitting the needle C in its downward movement to engage the loop formed in the thread carried by the needle C, before said loop has been released by the finger of the spreader.

The spreader F, together with the forward end of the spreader rod is under control of the presser-bar D, to the extent that when the presser-bar is raised or lowered by means of a cam shaped lever D", the spreader will also be raised or lowered to prevent its interference with the movement of the resser-foot.

lVhile I have shown and described what I consider the preferred form of mechanism embodied in my improvement it will be understood that structural changes or modification in the several parts may be made without departing from the scope of my invention.

Having described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a sewing machine, the combination of a spreader-rod a vertically movable presser-rod, pivoted hearings in which the spreader rod is journaled, one of said pivoted bearings having a fixed bearing in the frame of the machine and the other a hearing in a connection of said vertically movable presser-rod, a spreader suitably mounted upon the spreader-rod, and means for oscillating and simultaneously reciprocating the spreader-rod.

2. In a sewing machine, the combination of a main shaft and driving mechanism, a horizontally extending presser-foot, vertically extending needles, a spreader mecha nism comprising a horizontally extending spreader-rod provided with a spreader having a finger adapted to deflect the needle threads, an eccentric on the driving shaft, a bell crank lever having a swivel connection with said eccentric and a similar connection with the spreader-rod to impart a horizontal reciprocating motion to the spreader-rod and spreader, an eccentric operated by the driving shaft, and a rod on the last named eccentric swiveled to an arm on the spreader-rod to impart an oscillating motion to the spreader-rod and spreader.

3. In a sewing machine, the combination of the driving mechanism, a spreader-rod, a presser-bar and a presser foot carried thereby, pivoted hearings in which the spreaderrod is journaled, one of said bearings being pivoted to the fixed frame, means connected to the presser-bar and on which the other bearing is pivoted, a spreader suitably mounted upon the spreader-rod and a finger on its depending end to deflect the needle threads, means to impart both a reciprocating and oscillating motion to the spreaderrod, and means for lifting the spreader with the presser-foot.

4. In a sewing machine, the combination of the frame and driving mechanism, a spreader mechanism comprising a longitudinally disposed spreader-rod, pivoted bearings in which said spreader-rod is j ournaled, said bearings being arranged above the bedplate of the machine, a presser foot, a. bar connected thereto, and an arm controlled by the bar, one of said bearings being pivoted to the frame of the machine and the other to said arm, a spreader adjustably secured to the spreader-rod, a finger on the spreader adapted to engage the needle threads, an eccentric and connections controlled by the driving mechanism to impart a horizontally reciprocating motion to the spreader-rod and another eccentric and connections controlled by the driving mechanism to impart an oscillating motion to the spreader rod.

5. In a sewing machine, the combination with the lower stitch forming mechanism in cluding an oscillatory looper, a needle bar provided with thread carrying needles, a spreader mechanism comprising a spreaderrod journaled in pivoted bearings one of which is fulcrumed upon an arm controlled by the bar of the presser-foot, a spreader" mounted upon the spreader-rod and rovided with a finger t0 deflect the needle threads of the upper stitch forming mechanism, a driving shaft, an eccentric mounted thereon and provided With suitable connections adapted to impart a horizontally rec 1proeating motion to the spreader mechanism and. another eccentric mounted on sald shaft and so connected to the spreader mechanism as to impart thereto an oscillatory movement.

In testimony whereof I afllx my signature in presence of two witnesses.

JULIUS C. GOODWIN.

Witnesses:

DAVID S. WILLIAMS, ARNOLD KA'IZ.

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