US516252A

US516252A - whitney

Info

Publication number: US516252A
Authority: US
Publication date: 1894-03-13
Anticipated expiration: 1911-03-13

Description

(No-Model.) v I V R. W. WHITNEY;

RUPILING ATTACHMENT POE. SEWING MACHINES. 7 No. 516,252. Patented Mar. 13, 1894.

6 W @ZWLVL parted to lever O and are regulated in a man- RUEL W. WHITNEY, OF OLEVELAND,

ATENT OFFICE.

OHIO, ASSIGNOR TO THE STANDARD SEWING MACHINE COMPANY, OF SAME PLACE.

RUFFLING ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 516,252, dated March 13, 1894.

Application filed May 14, 1891. Serial No. 392,769- (No model.) I'

To aZZ whom it may concern.

Be it known that I, RUEL W. WHITNEY, of Cleveland, in the county of Ouyahoga and State of Ohio, have invented certain new and usefullmprovements in RuftlingAttaohments for Sewing-Machines; andI do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in ruffling attachments forsewing machines; and 1t consists in certain features of construction and in combination of parts hereinafter described and pointed out in the claim.

In the accompanying drawings Figure 1 is a viewin perspective of a rufliingattachment embody-ing my invention. Figs. Zand 3 are, respectively, a side elevation and plan of the vibrating arm B, the plan being somewhat enlarged. Fig. 4is an enlarged side elevation in detail of lever C.

A represents an angle-plate constituting the body of the device, the upright leg of the plate having a head aand this head having a slot a for attaching the device to the presserbar in the usual manner. The vibrating arm B and the depending vibrating lever 0 have an axial screw 19 in common, this screw ongaging a threaded hole in the opposing section of the upright leg or plate A. Arm B at the free end thereof is forked or slotted as at B, the prongs whereof are supposed t) extend astride a set-screw, pin or other laterally projectingmember of the needle-bar, by means of which the reciprocations of the needle-bar impart a vibrating movement to arm B. The vibrations of arm B arein turn imner hereinafter described. Lever O has a lateral pin 0' that operates in a verticallyelongated ear cl, the latter being an attachment of the ruffling-slide D. This slide has the usual teeth at D for engaging the work and the slide is provided with a longitudinal slot 01' in which operates a steady-pin a this pin connecting with plate Aand by means of which the slide is held laterally.

For regulating the throw of the slide to make large or small ruffles I provide lever O with a notch 0 approximately V-shaped, the

walls whereof are alternately engaged by an abutment-screw E of arm B. It is evident that if the point of the screw engaged the bot tom of the notch there would be no lost motion and lever G and the slide would in such case have their maximum throw. By backing the screw so that there will he more or less lost motion as between the point ofthe screw and the walls of the notch the throw of lever O and the slide willbe correspondingly reduced. If, in shortening the throw of the slide the movement were shortened alike at either end of the throw, in such case in making small ruffles the slide would not move the goods forward far enough to cause the needle to engage the ruffle or fold of the goods. The shortening of the throw of the slide must therefore be done mainly on the rearward stroke thereof; although it is admissible to stitch nearer the edge of a short ruflie than of a long ruflie, and hence a limited amount of the shortening can, and should be done, on the forward throw of the slide. make the right hand wall of notch 0 say approximately radial with the axis of lever C while the left hand wall is more tangential as shown more clearly in Fig. 4.. Hence, in elevating or depressing the screw the change in the throw of the lever is more radical when the screw engages the tangential wall that gives the back stroke to the lever and slide; hence the shortening of the throw of the slide is mainly on the rearward stroke, the arrangement being such that in making the shortest rufiie the needle will engage the forward end of the ruffle or fold of the goods.

The nut thatengages screwE is of the split variety shown and is constructed by doubling back a section or finger b of arm B,a clamping-screw I) being provided for more or less closing the nut to clamp the screw. Screw E havingbeen adjusted as required by tighteningscrew b screw E is held rigidly to its adjustment.

' What I claim is- In a ruffling attachment for sewing machines, the combination with' a plate, an arm pivoted thereto and adapted to be vibrated by the needle bar, a lever pivoted to said plate and provided with a notch the said notch being approximately V-shaped, one side of said I therefore notch beir ig approximately radial with the In testimony whereof I sign this specificapivotal polnt 0f the lever and the other tantion, in the presence of two witnesses, this 23d gentlal to said pivotal point, and a ruffling day of April, 1891.

slide actuated by said lever, of a screw car- RUEL \V. WHITNEY. 5 r1ed by the arm, the free end of said screw Vitnesses:

resting 1n the notch in the lever, substan- C. H. DORER,

tially as set forth. WARD HOOVER.