US996467A - Sewing-machine attachment. - Google Patents

Description

s. DAVIS. I snwme MACHINE ATTACHMENT. I I APPLICATION FILED JUNEZ, 1910. a 996,461 Patented June 27, 1911.

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WIIIIIIIIIIIII "IIIIIIIIIIII jwuo/vvtoz 5520712072 Dari! 565 2111}? SAW e4 4 S. DAVIS. SEWING MACHINE ATTAGHMENT APPLIGATION FILED JUNE 2, 1910.

Patented June 27, 1911-.

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Fzy- 44- senor/ion Davis, or NEW YORK, N. Y.

SEWING-MACHINE ATTACHMENT;

Specification of Letters Patent. Patented J une 27, 1911.

Application filed June 2,1910. Serial No. 564,620.

To all whom 'it may concern:

Be it known that I, SOLOMON Davis, citizen of the United States, residing at New York, in the county ofNew York and State '5 of New York, have invented new and useful Improvements in Sewing-Machine Attachments, of which the followingis a specification.

This invention relates to improvements in sewing machine attachments in which rotary motion of a driven shaft is converted by means of suitable mechanism into slow rectilinear motion, the object being to ,slowly i guide and feed the material toward the needle of the machine.

The attachment is especially adapted for sewing soft hat brims, but can be'used for other purposes such as cloth bufiing wheel disks, doilies, quilts, and similar useful and 0 ornamental articles. By reason of the slow feeding movement of the material toward the needle it is possible to sew a continuous spiral in the fabric. The width of the convolutions of the spiral may be varied by means of a device forming part ofthe attachment. The attachment can be fitted to and arranged on any ordinary sewing machine. The attachment feeds the fabric to ward the side of the needle, or parallel to the driving shaft of the machine to gage the width of the oonvolutions of the spiral, while the ordinary feed of the machine feeds the fabric toward the front of the needle or at right angles to the driving shaft. Heretofore necessary to feed the brim toward the side of the needle by hand.

In the accompanying drawings Figure 1 is a side elevation of a sewing machine embodying this invention.- Fig. 2 is a horizontal longitudinal section along the line m w of Fig. 1. Fig. 3 is a vertical section along the line y y of Fig. 1. Fig. 4: is a plan View of a hat brim, showing the convolutions partly sewed.

In this drawing the letter a designates a worm which is fastened to the driving shaft .of an ordinary sewing machine. This worm engages a worm wheel I) secured to a driven tened to the head and base plateeof the machine. The said driven shaft is provided at its h. The wheel .72. is normally in frictional in sewing a spiral in a hat brim, it has been shaft 0 which is journaled in supports fas contact with a cone pulley z' Iastened to a. counter shaft j. This counter shaft is also provided at one end with a gear k which engages 'a gear m fixed to a screw a. A nut p. is mounted on and engages the screw n and said nut has fastened to its lower end an arm carrying a guide plate 9. This guide plate 9 has rollers r pivoted to its rear end located under the plate. The plate 9 has slots 1; which serve as guides for the front rollers r and these rollers are pivoted to a bar w. A spring 5 mounted on a stem 6 is in oontactwith the bar and tends to push the bar with the rollers 1 toward the fabric.

A nut 7 is threaded on the stem 6 to adjust the compression of the spring.

The fabric is .placed under the guide plate 9 and between the rollers 1 and 1".

these rollers T will equally or evenly guide the fabric.

The needle is indicated at t in Figs. 1 and 2.

The nut 72 is slotted at the top or U shaped, as shown-in Fig. 3, so that it can be pushed .downward to disengage it from the screw, and thus set to its initial position without reversing the machine. A series of springs s tend to press the nut into frictional contact with the threads of the screw.

Thescrew n is journaled in a frame 0 fixed to the bed-plate of the machine.

It will be seen that the wheel h on the transmission shaft can be set along said shaft to different positions on the face of the cone pulley, thereby producing changes of speed in the counter shaft and the screw will revolve faster or slower, thus moving the nut-with its guide plate and the mate'- rial toward the needle at more or less speed and varying the spaces between the convolutions of stitches at will.

The transmission shaft is journaled' in standards fastened to the bed-plate and is provided with a spring a whereby it is moved toward the counter shaft to hold the wheel h in frictional contact with the cone ulley.

It will be noticed that the respective rollers 1" and r revolve when the material is fed toward the front of the needle.

Plates 8 are fastened to the head of the machine and extend downwardly to contact or engage the guide-plate 9. These plates serve to prevent lateral displacement of the said guide plate and steady the guide plate when it is moving forward.

I claim- 1.111" a sewing maghine attachment, the combination with a screw of a guide plate operated thereby, driving mechanism including a driven shaft, a transmission shaft and a counter shaft for revolving the screw to impart rectilinear motion to the guide plate, a device carried by the transmission shaft the speed of which is substantially constant and operatively connected to the counter shaft for changing the velocity of the: screw. 7

2. In a sewing machine attachment, the combination with a screw of a guide plate adapted to engage the screw, mechanism for revolving the screw to impart rectilinear movement to the guide plate, and

rollers located below and yieldingly connected to the guide plate to yieldingly engage a fabric.

' 3. A sewing machine attachment com- 'prising a screw, a guide plate adapted to engage the; screw, a counter shaft coupled to the screw and provlded with a cone pulley, a transmission shaft having an adjustable wheel to operatively engage the cone pulley, and suitable mechanism for coupling the transmission'shaft, to'a moving part of .a sewing machine.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

. SOLOMON DAVIS. WVitnesses BERTHA W'ILLER, CHRISTIAN ALMSTAEDT.

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