US929119A - Sewing-machine. - Google Patents

Description

L. BULASKY.

SEWING MACHINE.

APPLIOATION FILED AUG. 8, 1908.

Panented July 27, 1909.

I 6 SHEBTSP-SHBET 1.

inventor;

Y Attj s.

L. BULASKY.

SEWING MACHINE.

APPLICATION FILED AUG. 8, 190a.

929,1 1 9, Patented July 27, 1909.

GSHEETS SHBBT 2.

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' Attest: invcntor:

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L. BULASKY.

SEWING MACHINE.

APPLICATION FILED AUG.8.1908.

Patented July 27, 1909.

6 SHEETS-SHEET 3.

L. BULASKY.

SEWING MACHINE.

APPLICATION FILED AUG. 8, 1908.

929,1 1 9. Patented July 27, 1909.

6 SHEETS-SHEET 4.

L. BULASKY.

SEWING MACHINE.

APPLIOATION'IILED AUG. s, 1908.

Patented July 2 7.1909: 6 SHEETE BHEBT 5 Inventor:

m I? Attj s.

L. BULASKY.

SEWING MACHINE. APPLICATION FILED AUG. 8, 1908.

Patented July 27, 1909.

6 SHEETE-BHEET 6.

Inventor;

A2; A-ttys.

hurrah srnrns LOUIS BULASKY, OF NEW YORK, N. Y.

'SEWING-MA'GHINE.

nofeaane.

Specification of Letters Patent.

, Patented July 27, race.

Application filed August 8, 1908. Serial No. 4441604.

To all whom-it may concern.

Be it known that I, LoUIs BULAsKY, a citizen oft-he United States residing in the borough of Manhattan, of the city of New York, in the Stateof New York, have invented certain new and useful Improvements in SewingMachine's, of which thefollowing is a specification, reference being had to the accompanying drawings, forming a part hereof. I

This invention relates generally to sewing machines of the character of that disclosed in Letters Patent of the United States No. 777,074, dated December 13, 1904;, which machines are mainly used in the stitching of silk-, cotton and paper-covered wire at the edges of buckram hat frames and felt hats, and for otherpurposes. I

The general object of the invention is to improve the efiiciency, adaptability for various uses, and convenience in operation of machines of .this character, and it consists more particularly in certain improvements in various parts of such machine, all as will be more particularly referred to hereinafter.

In the drawings in which the several improvements are illustrated as embodied in a machine of suitable and convenient construction--'Figure l is a view in side elevation of such a machine. Fig. 2 is atop view thereof. Fig. 3 is an end elevation as seen from the left hand in 'Fig. 1-. Figs. 4 and 5 are respectively a top view anda view partly in horizontal section of the work guide or gage. Fig. 6 is a detail view in section on the plane indicated by the broken line 66 of 5. Fi s. 7, 8 and 9 are detail views illustrating dierent modes of stitching wire on the edge of buckram hat frames and felt hats. Figs. 10 and 11 are detail views illustrating features of construction referred to hereinafter. Figs. 12 and 13 aredetail views illustrating the connection between the looper and the main shaft. Figs. 14 and 15 aredetail views showing devices for rendering the feeder inoperative. Figs. 16, :17, 18 and 19 are detail views of the bed plate.

'The machine shown in the drawings is provided witha base a, adapted to rest .upon a suitable table, and .carryin aframe a which, together with I he usua arm a supports the-working pants-of the machine. The main shaft?) is mounted in suitable hearings in :the frame and is provided, as usual, with a driving pulley b and an eccentric b which, through the pitman 12 rleverl)" and link I) imparts to the needle bar c its vertical reciprocations.

The needle bar 0, arranged to carry the needle 0, as usual, is mounted to reciprocate vertically in a frame (1 arranged to oscillate about a vertical axis indicated at d instead of a horizontal axis, as described in said patent. The frame d carries :the needle bar with it in its oscillations, so that a zigzag stitch may be formed, and provisions are made whereby the amplitude of the .oscillat'ionsof the frame and the needle bar may be varied, to increase or diminish the width of the zigzag stitch, andeven -to be reduced to zero so that the machine shall form :an ordinary straight stitch, such provisions varying somewhat from those described in said lpatent, as will appear presently.

mounted a cam ehaving secured thereto a gear 6 which is engaged by a pinion e having half the number of teeth and mounted on the main shaft 6, so that the cam receives a complete rotation rfo r .two complete reciprocations of the needle bar. The cam e is engaged by a stud f on a curved, slotted lever f, suitably mounted on the frame of the machine. A link 7", which may be adjustably connected by a screw stud and bloclcf of usual construction, at any dothnow of the pants operated thereby, as hereinafter described, connects said lever viith a sliding frame 1 mounted .inisuitable guides, as at gand 9 on .the frame a, so'as to reciprocate ihorizontall-y. The upper forward end (7 .of the frame 9 .is connected, preferably :by axball-andsocket joint 9 (see Fig. 11) with an armd 'of the frame (Z. By this means the frame 01, and with it the needle bar, is oscillated about .its vertical axis, the cam e being so formed that the horizontal movement :of the frame and needle Ibar takes place only when the needle is at or near the highest point of its stroke and the point thereof is clearoif the fabric, While durin all other parts of its vertical movement t e needle is held from lateral movement.

fit is desirable to relieve the tension upon the thread during the lower .portion of [the stroke of the :needle as set forth in said patent. The devices employed 2501' the :purpose differ somewhat, fllQWQNBI, from those shown in said patent. In the upper art of the frame .55 is mounted a short she .0

Upon a stud 6, fixed in ;the frame a, is

sired point of the lever 7'', so as to vanythe To,the left hand end of the same is secured an arm a carrying a friction pad or foot which normally presses the thread against the guide plate 0 To the other end of the foot h and .a feeder it, both of which per-.

I form their usual functions substantially in looper shaft and looper.

the usual way.

The looper 2' possesses the same function as the corresponding part in the construction described in said patent, but is operated in a somewhat different manner. It is se cured to a hub z" grooved circumferentially as'at 2' and mounted upon a shaft 70 which, in the present machine, is solid and moves longitudinally within and rotates with the shaft 6, which in this instance is hollow. In this manner the shaft 6 has a long bearing in the base of the machine and the looper shaft k has a long bearing in the hollow shaft b. Upon the shaft b is mounted loosely a sleeve-like hub is, grooved circumferentially as at 71: and having a detachable finger k which engages a lug la. The latter is secured detachably to the shaft is in a slot formed therein and slides in a longitudinal slot 6 in thehollow shaft 5. The sliding frame 9 has an arm 9 which engages the slotted hub 70' and causes the same to reciprocate longitudinally, carrying with it the Since the frame (1 carrying the needle bar and the looper shaft carrying the looper are thus both reciprocated through direct connection with the sliding frame 9 and the amplitude of the reciprocations of the sli'dingframe is determined by the adjustment of the link f in the lever f, it is obvious that the needle and the looper must always hear the pro er relation and that such relation is not turbed by the adjustment of one of such parts. The proper rotation of the looper is insured by the engagement of the 111 carried by the looper shaft with the longitudinal slot in the hollow shaft 6 The work plate Z is secured to the base of the machine in the usual manner, being slotted as at l for the feeder h and slotted as at Z and provided with a bearin bridge Z for the throat plate m. Instead 0 having a wide opening to accommodate thelateral movements of the needle, whereby the work is not properly supported, the throat plate m has a narrow slot m and is made movable 'in synchronism with the lateral movements of the needle, having a lug m projected directly downward from the plate which en gages the circumferential groove in the hub i of the looper z','so that the throat plate is reciprocated through direct connection with the looper and the proper relation between the needle, the looper and the slot in the throat is therefore at all times maintained.

In the machine shown in said patent the tension device for the thread was represented as mounted. upon the arm a", but in the present machine, as shown at n, it is mounted on the sliding frame 9 and therefores moves in synchronism with the oscillating frame 6 and the needle bar so that there is therefore no interference with the tension of the thread through a changing of distance between the needle bar and the tension device, as-in the machine shown in said patent. The construction of the tension device is ordinary and neednot be described herein.

The work guide or gage is so constructed as to be adapted for the different kinds of work which are ordinarily done on machines of this character, such as the sewing of paperor cotton-covered wire upon the surface of buckram hat frames, near the edge, in which case the thread enters the material of the hat at each side of the wire, crossing to and fro over the wire, as shown in Fig. 7 or in sewing silk covered wire against the edge of felt'hats, in which case thesewing thread first enters the material of the hat and then catches thecovering of the wire adjacent to the edge of the hat, as shown in Fig. 8; or in sewing paper or cotton covered wire against .the edge of felt hats, to be afterward bound over, in whichcase the sewing thread first enters the material of thelhat and then passes outside of the wire, as shown in Fig. 9; and also so as to be adapted'for wires of different thicknesses. The gage or guide is shown in position on the machme in Figs. 1, 2 and3, and is shown in detail in Figs. 4, 5 and 6. It comprises a supporting plate 0 which is suitably shaped and adapted to be secured adjustably to the base of the machine having a longitudinal slot 0 fittin upon a shorter rectangular projection 0 o the base of the machine and held thereon by a thumb screw 0 Pivoted upon the plate 0, as at p, is a plate or lever 32 which at its left hand-end is bent to form a guide 19 as shown most clearly in Fig. 1, for the edge of the hat or frame, and a thin finger p to lie under the edge of the hat or frame and prevent it from working under the guide 79 This guide also holds the wire from moving to the left and is not adjustable except as it is adjustable with the supporting laneo. A spring p cooperates with the p ate or lever p to hold it in its working position, as shown in segue full lines in Fig. 1, but the plate or lever may be tilted into the position indicated by dotted lines in Fig. 1, to permit the release of the work at any time.

Mounted to slide on the v are two outside guides q and '1'. The out- 15, j elongated slot g to engage'a screw stud g thumb nut g on the stud g -alinement with res ect to the looper.

side guide gis formed with .a de nding guide hp 9 adapted to rest against t e outer side of the wire,that is, against that side which is the outer with respect'to the body. of the hat, and to hold it against the body of the hat and prevent it from being pushed away by the needle or otherwise. To accormnodate wires of different thicknesses the plate 9 is adjustable, being formed with an and being held in ad usted position by a The rear guide '9', is operative when the wire is to be stitched against the edge of the hat brim and is arranged to be held in an inoperative position when the wire is to be stitched upon the brim, as shown in Fig. 7. The rear guide 7' is also formed with a depending guide li K -.31. its left hand end and has a hm ted sli ing-movement on the supporting plate 0, be-

ing formed with anelongated slot 0 for en.

gagement with a holding and ide screw W. A spring 7* holds'theguide 11p normally in. its extreme left hand-position, but permits the guide to yield to the right as the needle descends and, after its point has entered the cover of the wire, its thicker portion thrusts the wire farther to the right, thus preventing the bending of the needle and the throwing of the needle out of pr e pler 1s yielding, rear gui e, is operative when the machine is used upon such work as is indicated in Fig. 8, but when the needle passes alternately on opposite sides of the wire, as

in the character of work indicated in Figs. 7 and 9, then the rear guide must be drawn back out of the way so as to permit the needle to descend at the right hand side of the wire as well as at the left hand side of, A latch s, properly formed to em' gage the uide plate 1', is pivoted on the sup-:

the wire.

porting p ate 0 to hold the guide in its right hand position.

The feeder k may be carried as usual by an arm, -h which is pivoted at h upon an {The to-and-fro or feeding movearm in. Y ment of the feeder h is'eifected by an eccentric h on the main shaft through a link h and the vertical movement of the feeder, which causes it torise into contact with the work during its forward movement and to descend away from the work during its rearward movement, is accomplished y an eccentric 71. on the shaft 6, which eccentric is embraced by a fork h on the arm 71?. fork is subject to quite rapid wear and heretofore it has been a matter of considerable trouble to compensate for such wear. In

supporting plate This the present case, however, provision is made for readily compensatin for suchwear, as shown in Fig. 10, in which the eccentric k is embraced'bya two-part sleeve h", the edges of the two parts not meeting. One member h of the fork h is detachable be tion, whenever the amount of wear upon the eccentric has become ob ect1onable, the member 72. is removed and 1ts surface 1n contact with the other part of the fork it is filed off slightly so that when again applied its extremity causes the two parts of the sleeve 72.

to be pressed together somewhat more closely, thus taking up wear between the cocentric and the sleeve while the wear is also {)aken up between the sleeve and fork memers.

-. In order that twoor three stitches may be taken at the end of a piece ofwork in such a manner as to prevent ravelmg, provision 1s made for stopping the forward feed of thework while the movements of the needle and looper continue, so that two or three stitches are taken one upon another and the thread is thus fastened. To accomplish this urpose the feeder hf may be thrown. out 0 operative position, as illustrated in particular in Figs. 14c and 15, which represent a modiby alatch which 1s shown as a disk h, cut

away as at h, and secured 'upon a short shaft h mounted in the arm k so that when the disk is-in the .position shown in Fig. 14 the arm h" is held in operative relation withthe arm k between the disk 12.

' ing held by-a screw h. With this construcand a disk 72. on the other end of the shaft,

but when the'shaft h is partially rotated the cut-away portion 72. of the disk h" permits the release of the arm 72. For convenience in effecting the release ofthe arm h so as to throw the feeder out of operative position, the shaft It? is provided with an arm h adapted to be-engaged by a fork h (see Fig. 15) carried by a sliding shaft h. The latter, in turn, is engaged by a hand 1ever 72. which may be conveniently placed foroperation.-

The mode of operation of the several parts of the im roved machine has been sufiiciently exp ained inconnection with the description of such parts and the operation of the machine as a whole will therefore be readily understood.

- It will beobvious that while the cooperation of all of the several improvements herein described increases the efiiciency and convenience in use of the machine, neverthe less some of such improvements are capable of being used without others, and it will also be obvious that changes in details of construction and arrangement of the several parts ofthe machine may be made to suit different conditions of use. The invention, therefore, is not limited to the details of the particular construction shown and described herein. I claim as my invention.

1. In a. sewing machine, the combination of a supporting arm, guides thereon, a sliding frame mounted on said guides, means to reciprocate said frame, a swinging needle ba-rframe,-the forward end of the sliding frame being directly engaged through a joint with the needle bar frame, a needle bar, means to reciprocate the needle bar, a looper, a l'oopershaft, and a main shaft supporting the looper shaft, the sliding frame having a direct engagement with the looper shaft to reciprocate the same.

2. In a sewing machine, the combination or a supporting arm, guides thereon, a,

looper are operatively connected, whereby they are moved in the same relation, a. cam,

a slotted lever actuated by said cam, and a connection, shiftable in said slotted lever,

between the lever andthe sliding frame.-

4'. In a sewingmachine, the combination of a supporting arm, guides thereon, a sliding frame mounted on said guides, a, swinging needle bar frame operatively connected with the sliding frame, a needle bar, means to reciprocate the needle bar, a reciprocating looper operatively connected with the sliding frame, and actuating. means for said sliding frame, comprising a cam, a slotted lever and a link. a

5. In a sewing machine, the combination of a hollow mainshaft havin a longitudinal slot, :1 looper, a looper s aftinounted to reciprocate 1n and rotate with the'main shaft and having a lug entering the slot'in the hollow shaft, a sleeve loosely surrounding the main-shaft, a finger detachably securedto the sleeve and en aging the lug,

and means to reciprocatesai sleeve.)

6. In a sewing machine, the combination of 'a supporting frame and arm, 'a swinging needle bar frame supported b'y said arm, a needle bar, a sliding frame also supported by said armand connected with the needle bar frame, a lever operatively connected to the needle bar and a tension device mount ed on the sliding frame and moving there with. e

This specification signed and witnessed this 6th day of August,'A. D. 1908. I

l LOUIS. BULASKY; I

Signed in the presence of- WV. B. GREELEY, AMBROSE L. OSHEA.

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