US2033294A - Sewing machine - Google Patents

Description

H. R. PAINE SEWING MACHINE March 10, 1936.

Filed Sept. 23, 1933 Atbur'ne Patented Mar. 10, 1936 UNITED STATES PATENT OFFICE SEWING MACHINE Hedley Roy Paine, Jandowae, Queensland, Australia 3 Claims.

This invention relates to feeder mechanism for sewing machines, the object of the invention is to provide a new and simple means of shifting the material being worked.

In its preferred embodiment my invention contemplates a bracket pivotally connected to the presser foot bar and having a bent part extending upwardly which engages with a roller journalled on the needle bar. The said bracket has suspended from it a feeder bar provided with a toothed extremity, engaging slots in the presser foot; a coil spring encircles the presser foot bar tensioning downwardly, and when the feeder bar extremity is in engagement with the cloth being fed through the machine exerts pressure on the feed bar to press its extremity down upon the cloth.

In the accompanying drawing which fully illustrates my invention and to which reference is made:-

Fig. 1 is an end elevation and part section showing the needle bar, the presser foot bar and the feeder bar with their parts and accessories as they appear at the commencement of the cycle.

Fig. 2 is a similar view to Fig. 1 but showing the parts as they appear at mid cycle.

Fig. 3 is a side elevation and part section of the presser foot and the feeder bar showing these parts as they appear during a stage of their operations.

Figs. 4, 5 and 6 are views similar to Fig. 3 but showing the parts in various positions.

Fig. '7 is a front elevation of the feeder bar and the presser foot showing slots in the presser foot.

I is a presser foot bar located slidably in bearings 2 and has attached at its lower end by a screw 3 a presser foot 4 containing a series of slots. To the presser foot bar I is swung by a screw 5 a bracket having lugs I and has an arm 9 extending upwardly which arm is engaged by a roller II! which is journalled on the needle bar I I. The needle bar is slidably mounted in bearings IIA. From the bracket 6 suspended by a screw I2 is a feeder bar I3 which extends down to form a three barred feeder I5 which slidably engages slots in the presser foot 4, said feeder bar I3 having projections I6 adapted to be engaged by the lugs 'I. A coil spring I1 is mounted on the presser foot bar I, its lower end being located in a hole in the bracket 6; a return spring I4 is mounted on the feeder bar I3 by a screw I 4A. I8 is the sewing plate of the machine whilst I9 is the needle plate.

The operation of the device is extremely simple and is as followsz-The cloth being worked is placed between the presser foot 4 and the needle plate I9; at the commencement of the cycle the operating roller III is at the top of the lever 9 as shown in Fig. 1 with the toothed feeder I5 engaging the cloth and now located at the rear of the slots in the presser foot 4 which is clear of the cloth. During the preliminary descent of the needle bar II the roller I assisted by the spring I! anchored in hole in the bracket 6 eases back the lever 9 and allows the feeder I3 to rise from the cloth 20 as shown in Fig. 2 and recede under pressure of the flat spring I4 to a position as shown in Figs. 2 and 3. In the meantime the presser foot 4 having descended under the action of the bracket 6 presses the cloth 2!] firmly to the needle plate during the continued passage of the needle bar. The foregoing represents one half cycle.

The parts are now in a position as shown in Figs. 2 and 3. As the needle bar I I rises clear of the presser foot 4 the roller Ill engaging the curve in the lever 9 swings the bracket 6 on the screw on the presser foot bar I, carrying the feeder I3 with its toothed extremity I5 down through the slots in the presser foot 4 to contact with the cloth 20. The continued movement of the lever 9 after the feeder I5 engages the cloth 20, lifts the presser foot 4 from the cloth 20 as shown in Fig. 4, the spring II causing the feeder I5 in contact with the cloth to be pressed thereagainst.

The still moving lever 9 causes contact of the lug I with the projection I6 on the feeder bar I3 and moves the feeder I5 engaging the cloth 20 along the slots in the presser foot 4 to a position as shown in Figs. 1 and 5. This completes one cycle.

What I claim as my invention and desire to secure by Letters Patent is:

1. In sewing machine feeder mechanism, the combination with the presser bar and its foot and the needle bar, of a bracket pivotally connected to the presser bar and including an upwardly bent cam arm, a member on the needle bar adapted to cooperate with the cam arm to swing the bracket, a depending feeder bar having a feeder foot extending freely through the presser foot, said feeder bar being pivotally connected to the bracket, and means on the bracket for swinging the feeder bar to advance its foot for feeding the cloth.

2. Sewing machine feeder mechanism as claimed in claim 1, wherein the means for swinging the feeder bar comprises projections on the feeder bar, and lugs on the bracket engageable with the projections upon the bracket being swung downwardly.

3. In a sewing machine feeder mechanism as claimed in claim 1 wherein a spring is provided on the presser bar for holding the cam arm of the bracket in engagement with the cooperating member on the needle bar and for pressing the feeder bar foot down on to the cloth fed through the machine, and a spring for returning the feed bar to its initial position upon the feeder bar foot being lifted from the cloth.

HEDLEY ROY PAINE.

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