US1193408A - Sewing-machihe - Google Patents

Description

EDWARD ISAC MOSES AND WILLIAM EDMOND KELLAR, OF LULIN Gr, TEXAS.

SEWING-MACHINE.

Specification of Letters Patent.

Patented'Aug. 1, 1916.

Application filed August 14, 1915. Serial No. 45,456.

To all w hom t may concern Be it known that we, EDWARD I. Moses and WILLIAM E. KELLAR, citizens of the United States, and residents of Luling, in the county of Caldwell and State of Texas, have invented a new and Improved Sewing Machine, of which the following is a full, clear, and exact description.

f This invention relates to sewing machines and has to deal more particularly with a sewing machine having an embroidering or darning spring presser foot attachment.

The general object of the present invention is to improve sewing machines so that a spring presser foot, darning or embroidering attachment can be used successfully. Heretofore these attachments have been applied to ordinary sewing machines in which v the needle bar reciprocates at too high a speed for enabling embroidering or darning to be satisfactorily accomplished. This objection is overcome in the present invention by providing a speed reducing drive between the crank shaft and the driving shaft in the arm or frame of the machine which reciprocates the needle.

A further object of the invention is the provision of an improved spring presser foot which is of comparatively simple and inexpensive construction, easily and quickly attached to the needle bar, and so designed as to permit the needle to closely approach the hoop in which the work is clamped.

With such objects in view, and others which will appear as the description proceeds, the invention comprisesvarious novel features of construction and arrangement of parts which will be set forth with particularity in the following description and claims appended hereto.

In the accompanying drawing, which illustrates one embodiment of the invention and wherein similar characters of reference indicate corresponding parts in all the views, Figure 1 is a perspective view of the spring presser foot in use; Fig. 2 is a sectional view on the line 2-2, Fig. 1; and Fig. 3 is a side view of a sewing machine constructed for use with a spring presser foot attachment.

Referring to the drawing, 1 designates the needle bar of a sewing machine which has a needle clamp 2, the lower end of the bar having a channel 3, Fig. 2, in which the butt 4 of the needle 5 is secured by the encircling clamp 2. This clamp also serves to secure in place the spring presser foot 5 which is a helix of spring wire having a flat work-engaging lower end 6 and a straight axial upwardly extending shank 7 that projects into the clamp 2 and is clamped between the same and the lower end of the needle bar 1, as clearly shown in Fig. 2. The spring presser foot operates in the usual manner to hold the work down during the passage of the thread into and out of the work, and moves out of engagement with the work during the last part of the up stroke of the needle, so that the work can be shifted to bring a different part thereof under the needle. Since the lower end of the spring presser foot is of small diameter the needle can operate on the portions of the work 8 in close proximity to the work-holding hoop 9.

In Fig. 3 the crank shaft 10 that is operated by the usual treadle 11 has a small pulley 12 fastened thereto in addition to the usual pulley 13. Around the small pulley 12 passes the driving belt 14, which also passes around the pulley 15 that rotates the usual needle operating shaft 16. If desired a suitable idler 17 may be used in connection with the belt for taking up the slack when the belt is shifted from the pulley 13 to the pulley 12. The purpose of this reduction drive is to operate the needle at a suitably low speed to enable embroidering or darning to be effectively accomplished. Another purpose is to obviate the danger of the treadle mechanism stopping on dead centers, which is a common fault when it is attempted to use spring presser feet with the high speed of an ordinary sewing machine.

It will be understood that when the spring presser foot is used the usual presser foot for ordinary sewing is removed so as not to be in the way of the spring presser foot, and during the ordinary use of the sewing machine the belt 4 will run around the large pulley or ily wheel 13, whereby the needle will run at a very high speed. This speed is too high for embroidering or darning, so that the belt for his work will be shifted to the small pul- From the foregoing description taken in connection with the accompanying drawing,

the advantages of the construction and method of operation will be readily understood by those skilled in the art to which the invention appertains, and while we have described the principle of operation, together with the apparatus which we now consider to be the best embodiment thereof, we desire to have it understood that the apparatus shown is merely illustrative and that such changes maybe madeV when desired as fall within the scope of the appended claims.

I-Iaving thus described our invention, we claim as new and desire to secure by Letters Patent:

l. In a sewing machine, a needle bar, a needle, a clamp encircling the bar for securing the needle thereto, and a spring presser' foot having a portion gripped between the clamp and needle bar to move with the latter.

2. In a sewing machine, a needle bar, a needle clamp thereon, a spring presser foot consisting of a helical coil formed with an axially disposed upwardly extending shank eX- tending between the clamp and needle bar, and a needle extending between the clamp and needle bar, whereby the clamp secures the needle and presser foot in place.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

EDIVARD ISAC MOSES.

VILLIAM EDMOND KELLAR.

' vWitnesses: A

DE MOLTE DAY, J r.,

ROBERT W. CARTER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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