US1016902A - Presser-foot for sewing-machines. - Google Patents

Description

G. s. SAVIGNAG & 0. B. MYERS.

PRESSER FOOT FOR SEWING MACHINES.

APPLICATION FILED NOV. 19, 1909.

Patented Feb. 6, 1912.

2 SHEETSSHEET 1.

COLUMBIA PLANOGRAPH CO.,WASHING1ON. D c.

G. S. SAVIGNAC & O. E. MYERS.

PRESSER FOOT FOR SEWING MACHINES.

APPLICATION FILED NOV. 19, 1909.

1,016,902, Patented Feb. 6, 1912.

2 SHEETS-SHEET 2,

51/112265565. fivenl' a rs: /WJW a W COLUMBIA PLANOlIRAPl-l c0., WAsmNu'roN, D. c.

TED STATES PATENT OFFICE.

GEORGE S. SAVIGNAC AND CHARLES E. MYERS, OF ST. LOUIS, MISSOURI, ASSIGN'ORS TO WALTER Gr. BATTLE, CYRUS E. CLARK, AND THOMAS W. IEUQUA, ALL OF ST. LOUIS,

MISSOURI.

Specification of Letters Patent.

Patented Feb. 6, 1912.

Original application filed June 11, 1909, Serial No. 501,462. Divided and this application filed November To all whom it may concern:

Be it known that we, GEORGE S. SAVIGNAO and CHARLES E. MYERS, both citizens of the United States, and residents of the city of St. Louis and State of Missouri, have invented a certain new and useful Improvement in Presser-Feet for Sewing-Machines, of which the following is a specification.

This invention relates to sewing machines and more particularly to the presser-foot or work-holding device.

It has for its principal objects to minimize the number of parts, to obviate the necessity of intermittently actuating the device to release the work as it is fed forwardly, and to attain certain other advantages hereinafter more fully appearing.

The subject matter of the present invention is divided out of an application for Letters Patent for an improvement in sewing machines, Serial No. 501,462, filed by us on June 11, 1909.

The invention consists in the parts and in the arrangement and combinations of parts hereinafter described and claimed.

In the accompanying drawings, which form part of this specification, and wherein like symbols refer to like parts wherever they occur, Figure 1 is a side elevation of a portion of a sewing machine embodying our invention, and, Fig. 2 is a front elevation thereof.

For the purposes of illustration, the presser-foot or work-holder is shown in the accompanying drawings as applied to the lock-loop-stitch sewing machine set forth in our application for Letters Patent, Serial N 0. 501,462, hereinbefore referred to. Therefore, only the parts of the machine which are directly associated with the present in vention will be herein set forth.

As shown in the accompanying drawings, the machine comprises a base 1 having a standard 2 thereon. On this standard is a circular housing 3 having flattened side walls. Extending transversely through the center of the housing is a shaft 4. A segment gear 5 having two oppositely disposed segmental extensions 6, 7, is fixedly mounted on the shaft 4 within the housing. Journaled on a transverse shaft 8 in the rear portion of the housing is a second segment gear 9 which meshes with said first-mentioned segment gear 5. The segment gear 9 has a lever-arm or extension 10 which is Serial No. 528,945.

pivotally connected to one end of a link or bar 11 whose opposite end is pivotally connected to a lug or car 12 on a vertically movable block or member 13. The block is slidably mounted in a vertical frame 14 which is mounted on the base 1. The block is provided with a laterally projecting stud or roller 15 which is adapted to cooperate with a cam groove in a rotatory disk (not shown) whereby a reciprocatory motion is imparted to the block when the disk is rotated.

Pivotally mounted on the segmental extension 6 of the segment gear 5 is a curved awl 16. The awl is arranged to cooperate with certain devices within the housing so that it is oscillated laterally at the same time it is reciprocated by the oscillation of the segment gear 5 upon which it is mounted. By this means, the work is intermittently fed forward each time the awl pierces it, so as to bring the puncture in the path of the needle. The needle 17 is fixedly mounted on the segmental extension 7 of the segment gear 5; and both the needle and the awl curved on the same radius from the axis of the shaft 4.

The upper front portion of the housing 3 is cut away to provide space for a worktable or support which preferably comprises a horizontal plate 18. This plate is firmly secured to the housing and it is provided with a slot through which the awl and needle work.

A carrier 19 for the locking-loop thread is slidably mounted in a horizontal guideway in or under the table 18 and it is intermittently actuated. It has a hook portion which is reciprocated across the slot in the table so as to lay a loop of the looking thread through a loop of the needle thread which is carried through the work by the needle. The stitch is set or completed by pulling the needle thread so as to interlock the two loops of thread and draw the same into the puncture in the work. This is accomplished by a take-up device comprising an oscillatory arm 20 which is fixedly mounted on the end portion of the rock shaft 4 outside of the housing 3. On this oscillatory arm is arranged a suitable thread guide with which a pivoted cam disk or other suitable gripping member cooperates. The take-up is arranged so that the thread is free to pass therethrough except during the time it is actuated to pull the thread in setting the stitch.

The presser-foot or work-holder comprises a member 21 which is pivotally mounted outside of the housing 8, preferably on the rock-shaft 4. The front end portion of this presser-foot has a lateral substantially horizontal extension 22 which projects over the work-table 18 and has a slot 23 therein through which the awl and needle work. The presser-foot member 21 also has a rearwardly and upwardly extending arm or extension 2a which is provided at its end with a boss or enlargement 25. The boss is provided with a vertical hole therethrough which is threaded to receive an adjusting screw 26. On the upper end of the screw is provided a knob 27 whereby it may be conveniently manipulated. The lower end of the screw bears against the top of the guide frame 14, so that by adjusting the screw, the presser-foot may be raised and lowered to accommodate dilferent thicknesses of work, C, C. In practice, the presser-foo-t is adjusted at such distances above the work-table, that the work thereon will be held firmly against undue vertical movement, but it may be moved ahead by the awl for each succeeding stitch without intermittently raising the presser-foot therefrom.

The upper end portion of the arm or extension 24 of the presser-foot or work-table 21 is preferably a strong spring so that the work may be held close to the work-table and yetthe presser-foot will yield sufficiently to compensate for any unevenness in the thickness of the work. So, too, it is preferable tohave the axis of the pivot of the presser foot substantially in the horizontal plane of the surface of the work. By this arrangement, the presser foot moves more nearly in a vertical direction than if the pivot is a considerable distance above the surface of the work, in which latter case it would lift in an upward and forward direction.

Obviously, the device admits of considerable modification without departing from our invention. Therefore, we do not wish to be limited to the specific construction and arrangement shown.

What we claim as our invention and desire to secure by Letters Patent is:

1. A sewing machine comprising a worktable, means for feeding the work, a workholder adapted to hold the work slidably on said t'able, said work-holder comprising a horizontally pivoted member having a forwardly projecting substantially horizontal portion arranged to overlie the work and an upwardly and rearwardly curved arm, the pivot of said work-holder being substan- Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,-

wardly projecting substantially horizontal.

portion arranged to overlie the work, and

also having a rearwardly projecting resilient lever extension, the pivot of said workholder being substantially in the horizontal plane of the surface of the work, an adjusting device at the outer end of said lever extension, and a support located in cooperative relation to said adjusting device whereby said work-holder may be adjusted for different thicknesses of work.

3. In a sewing machine, the combination with the work-table, of a presser-foot comprising a horizontally pivoted rocking lever having a forwardly projecting substantially horizontal portion arranged to overlie the work, the pivot of said rocking lever being substantially in the horizontal plane of the surface of the work, a lateral extension on -the forward end of said forwardly projecting portion having an opening through which the needle and awl are adapted to pass, a rearwardly projecting extension on said pivoted member, an adjusting device mounted on the end of said extenslon, and a fixed support located in cooperative relation to said adjusting device.

4. In a sewing machine, the combination with the work-table, of a presser-foot comprising a horizontally pivoted rocking lever having a forwardly projecting substantially horizontal portion arranged to overlie the work, the pivot of said rocking lever being substantially in the horizontal plane of the surface of the work, alateral extension on the forward end of said forwardly projecting portion which is slotted to permit the passage of the awl and needle, a resilient rearwardly extending arm on said member, and an adjusting device carried by the re silient extension and arranged toengage a fixed part of the machine.

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

GEORGE S. SAVIGNAC. CHARLES E. MYERS.

Witnesses:

N. N. MITCHELL, G. A. PENNINGTON.

Washington, D. C.

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