US1117206A - Attachment for sewing-machines. - Google Patents

Description

W. MAEGHLER.

ATTACHMENT FDR SEWING MACHINES.

APPLIGATION FILED NOV. 10, 1913.

Patented Nov. 17, 1914.

' [NVE/VTOR Waller [fiaeefilen W1 T/VESSES WALTER MAECI-ILEE, OF CHICAGO, ILLINOIS.

ATTACHMENT SEWING-NIAQHINES.

Specification of Letters Patent. P t t 17 1914,

Application filed. November 10, 1913. Serial No. 800,132.

To all whom it'may concern:

Be it known that LXVALTER MAEGHLER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Attachments for Sewing-Machines, of which the following is a specification.

This invention relates to button hole and similar attachments for sewing machines, and more particularly to the actuating shaft of such attachments where said shaft is operatively connected to the needle-bar or other reciprocatory part of the machine.

It is the object of the present lnventlon to provide an improved connection between the actuating shaft and the needle-bar, whereby an adjustment is rendered poss ble to adapt the attachment to different makes of sewing machines. This object is attained by means of the structure to be hereinafter described in detail, and in order that the invention may be better understood, reference is had to the accompanying drawing, in which Figure 1 is a plan view, showing the application of the invention; Fig. 2 1s a crosssection on the line 22 of Fig. 1; F g. 3 is a cross-section on the line 33 of Fig. 2, and Fig. 4k is a perspective view of one of the fork branches hereinafter referred to.

Referring specifically to the drawing 5 denotes a button-hole attachment for sewing machines such as is disclosed in the U. S. Patent No. 993070, dated May 23, 1911. The invention is shown in connection with this attachment, but it is not limited thereto, it being applicable with equal faclllty to otherv button-hole and similar attachments.

At 6 is denoted a rock-shaft which drives the operating elements of the attachment, said shaft deriving motion from the needlebar 7 of the sewing machine by being coupled thereto.

As already stated, the present invention relates solely to the coupling between the rock-shaftand the needle-bar, and a detailed description of the other parts of the attachment is therefore deemed unnecessary.

The outer end of the rock-shaft 6 carries a sleeve 8 which is made fast to the rockshaft and thus forms a part thereof. The rock-shaft is therefore composed of two sections, and said sections are adjustable so that the rock-shaft may be lengthened or shortened. The sections are locked in adusted posltion by a set screw 9 threaded through the sleeve Sand adapted to be seated in a longitudinal groove 11 in the shaftsection 6. It will be noted that there are two or more screw-holes in the sleeve, the ones which are not occupied by the setscrew being indicated at 12. These screwholes are offset from each other circumferentially of the sleeve, for a purpose to be presently made clear.

To the outer end of the sleeve8 is fixed an arm 13 shaped at its outer end to form one of the branches 14 of a fork, the other fork branch 15 being adjustably secured to the arm. At the base of the fork-branch 14: the arm 13 has a lateral extension 16 on which is clamped a lateral base portion 17 of the fork-branch 15, the latter being slightly offset to come squarely opposite the fork-branch 14. The part 16 has a slot 18 in which seats a lug 19 on the inner face of the part 17. A screw 20 is threaded into the lug from the outer face of the part 16, the head of the screw engaging the latter, whereby the fork-branch 15 is securely held in place. The slot 18 allows the fork-branch 15 to be adjusted toward and from the forkbranch 14:. The contiguous faces of the parts 16 and 17 are serrated as shown,-which assists to hold the fork-branch 15 in adjusted position.

The fork- branches 14 and 15 straddle the shank of the needle-holding set-screw 21 carried by the needle-bar 7. It will therefore be seen that the reciprocation of the needle-bar, through the fork arm 13, rocks the shaft 6. The object of the adjustable connection between the shaft 6 and the sleeve 8 is to allow lengthening and shortening so that the fork arm 13 may be placed 1n proper postion relative to the set-screw 21, which latter, in some machines, is located on one side of the needle-bar, and in others on the opposie side. Fig. 1 shows in dotted line how the forkmay beset opposite to either side of the needle-bar. The'plurality of. holes for the set-screw 9 are provided to allow angular adjustment of the sleeve 8 on the shaft 6. This is to adapt the fork arm 13 to rotary and shuttle-needle machines, the shuttle-needle being longer than the rotary needle; hence the necessity of setting the sleeve to lower the fork arm sulficiently to take the bar of the longer needle.

I claim:

In an attachment for sewing-machines, a rock-shaft, a sleeve carried by the rockshaft, a set screw carried by the sleeve and engageable with the rock-shaft to lock the 10 sleeve and the rock-shaft together, the sleeve having a plurality of holes, any one of floplem of this patent may be obtained for five cents each, by addressing the Commissioner of IEatents, Washington, D. C.

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