US530986A - Sylvania - Google Patents

Description

'(No Model.) 2 Sheets-Sheet 1.

J. EMANUEL 8a A. SPIELMANN.

SEWING MACHINE No. 530,986.

Pat emed Dec. 18,1894.

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J. EMANUEL & A. SPIELMANN.

SEWING MACHINE. No. 530,986. Patented Dec. 18,1894

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JACOB EMANUEL AND ADOLF SFIELMANN, OF PHILADELPHIA, PENN- SYLVANIA, ASSIGNORS OF ONE-THIRD TO HAYMIN MAIMIN, OF SAME PLACE.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 530,986, dated December 18, 1894.

Application filed November 3, 1894- Serial No. 489,901. (No model.) I

T0 or whom, it may concern:

l 3e it known that we, JACOB EMANUEL, a citizen of the United States, and ADOLF 'SPIELMANN, a subject of the King of Austria- Hungary, and both now residing at the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have jointly invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification.

Our invention has relation to sewing machines; and relates more particularly to the construction and arrangement of a thread controlling device for that class designated as button-hole sewing machines.

The principal object of our invention is to provide a simple, inexpensive and effective thread controlling device detachably connected with the needle bar of a button hole sewing machine; and to which end it consists of a detachable cap applied to a rotary needle bar and provided with adjustable fingers or arms of dilferent lengths and having thread guiding eyes and said fingers or arms adjustably engaging said cap and extending in different directions from said needle bar, as hereinafter more fully described and claimed.

The nature and general features of our invention will be more fully understood from the following description taken in connection with the accompanying drawings forming part hereof, and in which- Figure 1, is a side elevational view partly in broken section of the well known form of Reece button-hole sewing machine provided with a needle bar having an adjustable and detachable thread controlling device embodying features of our invention in application thereto, the needle bar being shown in an elevated position with the thread or silk in a slack condition and in such length as to feed the needle therewith in the formation of the first stitch 0f the button-hole to be sewed.

Fig. 2, is a perspectiveview of the'upper part of the machine, showing the position of the needle-bar and the thread cont-rolling device, when the machine has completed the sewing of the button-hole and the condition of the thread or silk in such position of the needle the thread slackened by the half revolution of the needle-bar.

Referring to the drawings with special reference to Fig. 1, A is the movable overhanging frame of the machine suitably connected to a bed-plate, as illustrated in the Letters Patent No. 240,546, of April 26, 1881, and No. 349,359, dated September 21, 1886, to which recourse may be had, but it may be here remarked With respect to the general operation of such type of machine, that the material is held by a stationary clamp and the stitch forming and cutting mechanisms are carried by the traveling frame, so that the buttonhole is first cut in the material, the stitch forming devices move along one side of the button-hole to work the same, then with a partial rotative movement around the eye thereof and finally backward along the second side of the button-hole to complete the same; it being understood that the stitch forming mechanism is at rest, while the button-hole is being cut, and is automatically brought into operation when the traveling plate has retreated far enough to free the cutter of the needles. When the stitching of the button-hole has been completed the stitch forming mechanism is automatically suspended. The longitudinal or traveling movement of the plate, carrying the stitch forming'mechanism is impartedto the same from the groove of a cam-wheel rotating on a hub attached to a stationary frame and acting on a stud attached to the traveling plate and the slight lateral movements of this traveling plate are effected by a rock-shaft having arms engaging respectively said cam and plate, as in the said Patent No. 240,546, fully ex plained.

The needle bar B,in this instance, has but one needle B, with an eye B and is supplied with thread or silk from a spool or bobbin E, through a feeder O, to the spring controlled tension device D, and therefrom to and through the eyes of a controlling device of our invention to be hereinafter fully ex- 100 plained and thence to and through aguide 9, to the eye B of the needle B. a

It may be here remarked that the needle B, at each descent is caused to penetrate the material at a little distance back from the edge thereof and when the needle arrives at the eye of the button-hole, the needle-bar B, and needle B, are set in slow rotary movement, while the stitch forming mechanism below the throat plate which has been moved longitudinally is actuated laterally and partially rotated in alignment with the needle-bar B, so as to carry the stitches around the eye of the button-hole. The stitch forming mechanism, it may be here remarked, is operated by means of a sector and gears; the sector deriving its movement from the groove in the cam wheel, all as fully described in the said last mentioned patent.

a, in Fig. 1, isa tapering cap fitting theupper extremity of the needle bar B, of the Reece machine, and provided with a tightening screw 0,, and an oblong slot a extending through the body thereof.

a is an adjustable screw fitting the body of the cap a, from the top and adapted to be brought into engagement with fingers or arms I) and b, as illustrated in Figs. 1 and 2, one of which is made longer than the other in order that during the rotary movement of the needle bar through a half revolution by means of the sector-gear B of the machine, the. thread or silk in passing through the tension 1 device D, from the spool E, mounted on the holder F, may in required quantity be gathered to provide slack thread or silk for the.

formation of the first stitch of the sewing of the button-hole as will be presently fully explained. In the ascent of the needle follow-.

ing, in order to form the other stitches, the

thread will be drawn by the guide or feeder G, from the spool or bobbin E, in sufficient. quantity to permit the subsequent supply of l 5 the position as illustrated in Figs. 2 and 3.

the needle therewith.

The arms or fingers of the thread or silk given to those shown in the drawings, because such have given good results in the practice 1 The fingers or arms disposed at an angle to each other are provided .ofthe invention.

with eyes I) and b for the passage therethrough of the thread or silk from the bobbin E, feeder C, and tension device D, and which is led from the arm I), in a downward direction into engagement with or through the guide 0, and through the eye B of the needle B.

In the operation of the Reece machine such as hereinbefore described, the needle bar B, is caused by the completion of the sewing of the button-hole, to assume the position illustrated in Figs. 2 and 3, and as well the arms I) and b, and the thread to assume such positions as so illustrated therein.

Before the needle-bar B, and its needle B, is afiorded a vertical motion to commence the sewing of another button-hole, the same by means of the sector-gear B mes-hing with a fixed gear of the needle-bar B, is turned in the direction of the arrow in Fig. 3, until the needle which is eccentrically connected with the needle-bar B, the arms b and b, and thread guide 0, assume respectively thepositions illustrated in Figs. 1 and 4. It should be borne in mind that the thread or silk which was caused to occupy a taut or unslackened condition will be slackened for the length of the thread between the eye 6 of the arm I), occupying the position in Fig. 3, to that of the same eye and arm in the position shown in Fig. 4. This length of thread is sufficient to allow of the formation of the first stitch in the stitching of the button-hole without a supply of thread from the spool E, which is necessary for the formation of the other stitches in the sewing of the button-hole.

Hitherto it was necessary to pull out by hand a sufficient length of the thread or silk to form the first stitch in order to prevent a disengagement of the thread or silk from the needle in its descent, as the feeder 0, did not feed the thread from the spool E. In a word, the operator had to draw more than a sufficient length of thread or silk from the spool E, than was necessary to form the first stitch, and thus was unnecessary waste occasioned in the stitching of thebutton-hole, but according to our invention when the needle B the respective arms I) and. b, and guide a, are caused to assume the position as illustrated in Figs. 1 and 4c, the needle-bar B, and its needle B, will move downward and form the first stitch in the manner set forth in the Reece patents hereinbefore mentioned, and the thread or silk will become taut and remain in such condition, until the sewing of the button-hole has been completed, in which operation the needle bar B, the thread guide 0, and the arms I) and b, will be returned to When the arms b and b, the guide 0, and needle-bar B, during the formation of the stitches in the sewing of the button-hole by the instrumentality of the sector-gear B and the fixed gear of the needle bar B, are returned to the positions illustrated in Figs. 2 and 3, the thread or silk will again be slackened for the formation of the first stitch of another button-hole by the needle bar B, needle B, arms I) and b, and thread guide a, respectively assuming the positions illustrated in Figs. 1 and 4:, as previously fully explained. V

The particular advantageous feature of our invention as described is the obviating of waste of the thread or silk in the formation of the first stitch in the sewing ofa buttonhole.

Having thus described the nature and objects of our invention, what we claim as new, and desire to secure by Letters Patent, is-

In a sewing machine, a rotary needle-bar, a detachable cap provided with adjustable fingers or arms of different lengths and havoursignaturesin the presence of two subscribing thread guiding eyes and said fingers or ing witnesses.

arms adjustably engaging said cap and ex- JACOB EMANUEL, tending in diiferent'directions from said nee- ADOLF SPIELMANN. 5 die-bar, substantially as and for the purposes Witnesses:

set forth. THOMAS M. SMITH,

In testimony whereof we have hereunto set LOUIS WINTERBERGER.

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