US2633093A

US2633093A - Darning attachment

Info

Publication number: US2633093A
Application number: US224195A
Authority: US
Inventors: Herbert H Russell
Original assignee: Greist Manufacturing Co
Current assignee: Greist Manufacturing Co
Priority date: 1951-05-02
Filing date: 1951-05-02
Publication date: 1953-03-31
Anticipated expiration: 1970-03-31

Description

March 31, 1953 H. H. RUSSELL DARNING ATTACHMENT Filed May 2-. 1951 BY I P- g ATTORNEYS Patented Mar. 31, 1953 UNITED sr-Ar;

TENT or Fig crashes Y-DAPJNING ATTACHMENT l-ierbert H. Russell, New Haven, -Cnn :assignor to The Greist Manufacturing Company, .New Haven, Conn a corporation .of Connecticut Application May 2, 1951, Serial No. 224,195

2 Claims. (01.112-236) This invention relates to an attachment :for household sewing :machines :and :more particularly to an'attachment .of this character for performing adarning operations.

.Inxthe use of .anattachmentiofithe character of that shown in the present application, "the presser :foot ::of :the :sewing machine is "not :employed, the attachment :itself having .a clothholding :member, and the attachment is secured to 113113 needle bar as "distinguished from :most sewing machine attachments which are secured to the :presser bar.

:Mostsewing machines in use at the present time are provided with .a reciprocable "needle bar :and a clamping member at the lower end of this bar to clamp the needle removably in place. In ithezpresent construction means are provided for'isecuring the attachment to the needleclamping member so that it is universally applicable to sewing machines of many-different makes. This is, of course, a great advantage for an attachment of this kind for as different makes of sewing machines cften'differ in details of construction; an attachment which will :fit one very often will not fit another, so that aseparate attachment mustbe made for veachmachine.

Also, the present attachment is one which is of very simple construction in'that it is provided with a cloth-holding member or foot carried by a laterally offset arm or portion of a vertical stem, which stem is slidably mounted in the attaching or clamping member which clamps upon the needle clamping element. This stem is spring pressed downwardly .so that it normally stands in its lowermost position with the :foot portion offset from the stem so that the needle passes through an opening in the foot. The downward movement of the foot member is limited so that the needle always stands in this opening even though the foot member is raised off the cloth when the needle is raised. With this construction the foot member does not need to be secured against lateral movement with respect to the clamping member of the attachment as the engagement of the needle in the opening in the foot will prevent rotation of the latter about its stem.

One object of the present invention is to provide a darning attachment for sewing machines which will be of simple construction and efiicient in operation.

Another object of the invention is to provide a darning attachment for sewing machines which is adapted to be secured to the needle clamp of the sewing machine so that the attachment may be applied .to machines iofman-y 'difierent facturers.

Still another object "of the inventionis .to wirevide a darning attachment having a clothholding foot extending laterally :from a :vertical stem, which stem is. slidablyand .looselymounted in .a U-shaped clamping member which serves as the frame of the attachment :so that the needle will be disposed :at all times within an opening inthecloth-holding foot.

"To these and other ends the inventionconsists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawing:

Fig. 1 is a side elevational view of the'needle bar of a sewing machine havin my "improved attachments secured thereto; a

Fig. 2 is a front elevational view of the parts shown in Fig. l; and

Fig. "3 is a perspective view --of the -darning attachment removed from the needle bar.

To illustrate a preferred embodiment of my invention '1 have shown a needle bar IB having the usual needle -Il clamped'thereto. At the lower end 'ofthe needle bar is provided ameedle clamping element which comprises a sleeve "f2 which fits over the lower'end of the needle bar, and a laterally'projecting collar 1-3 of cylindrical shape'which is internally threaded to receive the clamping screw i l. The sleeve portion 12 and collar l3 are either integrally formed 'or rigidly secured together, and the end of the screw "l4 enters an opening in the needle bar ii! to clamp the needle H in place. It-would, 'of course, be impracticable tosecure'the darning attachment to the screw H, but the laterally extending collar I3 provides a member which surrounds this screw and which projects from the sleeve portion [2 so that the attachment may be secured. to this collar.

The attachment comprises a U-shaped clamping member l5 which serves as the frame, this member being provided adjacent the free ends of the legs l6 and I1 with facing recesses l8 and is to receive the upper and lower portions of the cylindrical collar [3 so that the legs of this clamping member may embrace the collar. A screw 20 provided with an enlarged head 2| may pass through the upper leg of the clamp and be threaded to the lower leg thereof so that the two legs of the clamping member may be drawn tightly together to secure the member to the collar. It, of course, may be readily detached by removing the screw and spreading the legs IGandl'l.

Slidably mounted in the clamp member I5 is a substantially vertically extending stem 22 provided at its upper end with an enlarged portion 23 which limits the downward movement of the stem with respect to the clamping member. This stem is turned laterally at its lower end to provide a substantially horizontally extending portion 24 which terminates in a downwardly extending portion 25, the latter carrying a substantially horizontally extending cloth-holding foot portion 26. This foot portion is bent into circular form so as to provide an opening 21 which may receive the needle of the sewing machine.

Embracing the vertically extending portion 22 of the stem is a compression spring 28, the lower portion of which is coiled tightly about the horizontally extending portion 24 and as the portion 2-5 of the stem member is slightly enlarged, the spring will react against the member 25 at its lower end. The upper end of the spring 28 acts against the lower surface of the lower leg 11 of the clamp 15 so that the stem 22 will be urged downwardly as far as permitted by the stop member 23.

It will be apparent that as the stem 22 is slidably mounted in the clamp, it may be forced upwardly when the needle bar descends and the foot portion 26 engages the cloth upon which the darning operations are being performed. As shown in dotted lines in Fig. 2, however, the proportions of the parts are such that when the stem 22 is projected downwardly by the spring to the full extent permitted by the stop 23, the lower end of the needle H is still disposed within the opening 21 of the foot 26 so that the foot member will never be permitted to rotate out of engagement with the needle.

When the needle is in its upper position, as

shown in dotted lines in Fig. 2, the foot member will be raised from the cloth so that the cloth may be moved as desired by the operator. When, however, the needle is in its lower position, as shown in dotted lines in Fig. 1, the foot will be in engagement with the cloth and will be forced into engagement therewith by th compression of the spring 28 as the clamping member i5 will move downwardly on the stem 22. As the needle moves upwardly, the foot 26 will remain in position upon the goods being held in such position by the spring 28 until the needle bar reaches the position shown in full lines in Figs. 1 and 2, at which time the stop member 23 will be in engagement with the upper surface of the clamping member I5. Continued movement of the needle will, of course, raise the foot member from the cloth.

While I have shown and described a preferred embodiment of my invention, it will be understood that it is not to be limited to all of the details shown, but is capable of modification and variation within the spirit of the invention and within the scope of the claims.

What I claim is:

1. In combination with the needle bar of a sewing machine having a needle-clamping element thereon, a darning attachment comprising a clamp member adapted to be secured to said needle-clamping element, a downwardly projecting stem slidably mounted in said clamp member, a cloth-holding foot on the lower end of said stem, spring means urging said stem and foot downwardly, said clamp member being of U-shaped form with spaced legs embracing said needle-clamping element, and means for drawing said legs together to secure the attachment in place, said stem extending through guiding openings in both of said legs.

2. In combination with the needle bar of a sewing machine having a needle-clamping element thereon, a darning attachment comprising a clamp member of U-shap-ed form having vertically spaced legs adapted to embrace and be clamped upon said needle-clamping element, a downwardly projecting stem slidably mounted in both leg of said clamp member, a clothholding foot on the lower end of said stem, spring means urging said stem and foot downwardly, said stem having a vertically disposed portion at its upper end, an intermediate laterally turned portion at the lower end of the vertically disposed portion, and a downwardly extending portion below said laterally turned portion upon which the foot is carried, and said spring surrounding said vertically disposed and laterally turned portions.

HERBERT H. RUSSELL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 823,442 Rodman June 12, 1906 1,018,622 Karle Feb. 27, 1912 1,452,687 Hemleb Apr. 24, 1923 FOREIGN PATENTS Number Country Date 14,027 Germany July 6, 1881