US247750A - Feed mechanism for sewing-machines - Google Patents

Description

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` M. A. DILL'BY.

FEED MEEANISMEOR SEWING MACHINES.

' 4l\o.24".750. PatentedOot. 4,1881.

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M. A. DILLEY.

EEED MEGHANISM EOE SEWING MACHINES. No. 247,750. Patented Oet. 4,1881.`

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MARTIN A. DILLEY, OF WASEPI, MICHIGAN.

FEED MECHANIS'Ml FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 247,750, dated October 4, 1881.

Applicationled July 5, 1881.

To all whom it may concern:

Be it known that I, MARTIN A. DILLEY, a citizenof the United States of America, residing at VVasepi, in the conntyoi' St. Joseph and State of Michigan, have invented certain new and useful Improvements in Sewing-Machine Feeds; and I do hereby declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertains to make and use K `the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention has relation to improvements in sewing-machines, especially ofthatclasshaving an under feed; and its object is to provide additional holding and feeding means above the cloth, which co-operates with the underfeed in carrying or feeding the fabric withoutliability to crimp or gather. It also is intended'to remove the existing difculties attending the sewing through seams and other thick or abrupt places in a fabric.

My improvement consists in the novel construction and combination of parts, as will be hereinafter set forth and claimed.

In the accompanying drawings, Figure l is a perspective view of a sewing-machine head and the front portion of a sewing-machine table. Fig. 2 is a front view of the sewing-machine head with the face-plate. Fig. 3 is a rear view of the face-plate. Fig. ais aperspective and detail view of the upper-feed device. Fig. 5 is a perspective View of the presser-foot and upperfeed device; andFig. 6 is a perspective view of the means for operating the upper feed.

The letter A represents the needle-bar of a sewing-machine of the common construction, but having at a a recess formed for the purpose of admitting one of the arms of the trip, hereinafter described.

The letter B represents the presser-bar, also recessed at b for the purpose of receiving the projecting arm of the eXtra presser -bar and feed, so as to be acted on by the lifter of the presser-bar.

The letter C (see Fig. 6) represents my improved presser and holder, consisting of the bar c, formed at its upper end with the project- (No model.)

ing arm c, and at its lower end re'enforced, substantially as shown in the drawings. To the lower end of this bar, on the outside face of the reenforced part, is rigidly secured by an5T suitable means a plate-spring, d, the action of which constitutes the upper feeding means, as hereinafter stated, and to the lower end of this spring is s curr-d the presser-foot e, ot' the form substantially as shown in Fig. 4 of the drawings. This foot is slotted in front for the passage of the needle, and is formed with the heelfon its under side. The wall between the needle-bar and the bar of the main presser is recessed at g, and in this recess, pivoted to the wall, is a trip, 7l., one arm of which engages with the upper shoulder of the recess in the needle-bar, and to the end ot' the other arm of the trip is pivoted aconnecting-arm,,extending downward and pivoted to` the bar of the .presser and holder. The object of this device and its connection with the presser and feed is to lift the feed as the trip engages with the needle-bar in its downward movement.

The letter D represents a coil-spring surrounding a rod, one end of which is fixed in the lower end of the presser and holder, and the other end operates loosely in ahole through a nut iixed in the face-plate. The oftice of this spring is to set the presser and holder ou the fabric when the trip disengages from the needle-bar. In the drawings this spring is shown on the outside of the face-plate, but in this instance theimprovements are attached to a machine of the ordinary make, employing areciprocating under feed. In manufacturing machines the spring may be provided for on the inside of the face-plate, which can be constructed to admit a long bar, similar tothe common presser bar, and the pressure ot' the spring regulated by a thumb-screw or other suitable means.

The letter E represents the presser-foot on the main presser-bar. 1t is of the usual configuration, but is formed with a slot, 7c, made large enough to admit the free passage of the presser and feed foot e, and that is the object of this enlarged slot.

The letter m represents a lever pivoted to the head, the office of which is to raise the presser-foot by engaging with the projecting IOO arm c and a shoulder in the ordinary presserbar, the same movement lifting both pressers from the fabric.

Operation As the fabric is introduced to the action of the needle, and is being fed by the under feed in the usual way, the presserfoot is raised, thereby taking the pressure off; butjust before or at the time the presser-foot rises the holding-foot drops down on the fabric and there remains until the under feed has carried the cloth, and with it the foot of the holder,back the length ofonestitch, the spring between the bar and the foot admitting of this lnovement, and the heel of the foot acting as a purchase, and at the same time the spring holds the fabric frmlyon theundcr feed,there by preventing any stoppage ofthe upper layer of cloth or carrying ahead the under layer, both heilig carried along simultaneously. After the material has been fed one stitch the presser-foot drops and holds it until the under feed engages the material again, when the operation is repeated.

It will be observed that the object of the heelf ofthe holding-foot c is to crimp thefabric over the point of the under feed, thereby preventing stoppage or slip ofthe fabric while it is being carried along thelength of a stitch, which is a veryimportant feature in themechanism, and thus the advantages of the combination of the parts of an Lipper holder and presser device and an under feed of a sewingmachine are demonstrated.

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

1. The combination, in a sewingmachine having a reciprocating under feed, of an elastic holding device, a needlebar, a forcingspring, and a slotted presser-foot surrounding the holding device, said holding device being actuated in its vertical movements alternately by the needle-bar and the forcing-spring, substantially as described, and for the purposeset forth.

2. The combination, iu a sewing-machine having a reciprocating under feed, of the needle-bar form ed with the recess a, and the holder and presser C, having at the upper end a trip, h, engaging with the upper shoulder of the recess, substantially as described.

3. In a sewingmachine of the class described, the holder or presser C, consisting of the bar c, flat spring d, and foot e, with heelf, substantially as described.

4. The holder and presser C, consisting-ot' the bar c, formed at its upper end With the pro- 'eetiufr arm e the flats )rinfrd and foot e with 4l :n 7 c a i heelf, substantially as described.

5. In a sewingmachine of the class described, the combination, with the holder and presser C, of the connecting-arm i, trip 71, attached to the upper end of the holder and presser, with needle-bar A, having the recess a, substantially as described.

In testimony whereof I aix my signature in presence of two witnesses.

MARTIN A. DILLEY.

XVitnesses:

JENNIE A. GREENE. S. E. CHASE.

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