US122113A - Improvement in sewing-machines - Google Patents

Description

Us JOHN FANNING @L EDWARD NUGENT;

Improvement in Sewing Machine.r

` Patented nec. 26, 1871.

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L ITED STATES PATENT OFFICE.

I JOHN FANNING AND EDWARD NUGENT, OF BROOKLYN, ASSIGNORS TO JOHN C.

ADAMS AND JOHN H. ANDRUS, OF BUFFALO, NEW YORK.`

IMPROVEMENT I'N SEWING-MACHINES.

Speciiication forming part of Letters Patent No. 122,113, dated December 26, 1871.

Specification describing certain Improvements in Sewing-Machines invented by JOHN FANNLNG and EDWARD NUGENT, of Brooklyn, in the county of Kings and State of New York.

Our invention consists in certain novel combinations and arrangements of parts which have for their object to produce a sewing-machine capable of being changed and adj usted at pleasure to sew either the ordinary shuttle-stitch or the the double-loop stitch. v

Figure 1 of the drawing is an elevation of our improved machine separate from the stand rep resenting the back of the machine or the side opposite to that at which the work is inserted in. Fig. 2 is a view of the under side of the machine. Fig. 3 is a view taken from the right-hand side ofFig. 1 with the faceplate C removed to show .thearrangement of the mechanism employed to drive the needle. Figs. 4 and 5 are views in detail of the device employed to chan ge the relative time of the movement of the looper with the needle when the machine is required to sew the double-loop stitch, Fig. 5 being a section through the line .1: m, Fig. 4. Fig. 6 is a sectional view through the line y y, Fig. 1, showing the looperoperating mechanism.

The parts A B represent the casting or frame of the machine in which the several operating parts have their bearings, the former constituting the bedplate, and the latter the arm for supporting the needle-operating mechanism. The driving-shaft D has its bearings in the lugs H H on the under side of the bed-plate and operates both It gives an oscillating motion to the needle-operating shaft E by means of the crank .0, connecting-rod Gr, strap N, and eccentric L, and it also gives a vibrating movement to the' shuttle-driving and looper-operating lever F, throughthe eccentric K, strap N, and connecting-rod jointed to the lever at d. The needle-bar Q has a reciprocating motion given to it by the link a, pivoted at c to the needle-bar, and at b to the disk P on the end of the oscillating shaft E. The extent of motion of the needle-bar is governed by the length of the link a, which is pivoted at the end b and held to the disk l? by the nut or set-screw at that end, which passes through a slot in the disk, and its motion can therefore be regulated by adjusting the link a. This arrangement is shown in the detail view Fig. 3, where the faceplate C is removed and the position of the needle-bar when at its lowest pointv is represented by the .dotted lines. The lever F is provided with an arm, f, which drives the shuttle-carrier l through the medium of the link g, and has also another arm, e, which can be connected to the looper S when it is desired to work the double-loop stitch. When the looper S is not in operation it is held back out of the way by the catch h on the under side of the bed-plate, and when the shuttle is not operating and is disconnected from the end fof the lever it is held back in like manner by the spring catch i. The motion of the shaft E is at all times uniform with the shaft D, as the eccentric L is fixed on the shaft D, but the relative movement of the eccentricK can be changed by virtue of the arrangement of the parts shown in the detail views, Figs. 4 and 5. The collar J, there shown, is Xed on the shaft D by a setscrew and has a pin, T, Vwhich passes through it and enters a hole in the eccentric K, this eccentric being loose on the shaft D and turning with the collar J, as will be readily understood. By this arrangement therelative time of the two eccentrics K L can be changed without deranging the other parts of the machine.

In Fig. 2 the machine is represented as being adjusted to sew the lock stitch with needle and shuttle, but when it is required to sew the doubleloop stitch with needle and looper the shuttlecarrier is disconnected from the arm f and held back by the catch i, and the pin in the endof the looper S is slipped into the slot in end of the arm e of the lever F. The arm eis made of such length as to give the proper throw to the looper S, but as its time of movement with respect to the needle requires to be changed, the pin T is and shaft D turned until the pin` engages in another hole in the eccentric K, made just forward of the first hole. This change will cause the eccentric K to operate upon the lever F a little sooner than it did when it occupied the working of the lpoper. It is also necessary when the machine is altered to sew the double-loop stitch to shorten the throw of the needle. This is accomplished by loosening the screw b on the face of the disk P and shortening the link a the required amount, as this amount is governed by drawn out of the eccentric K and the collar J,

former position, and is necessary to the proper l the length of the slot in the face of the disk l?,

so that the adjustment can be quickly and accurately made. The mechanism shown in Fig. 6 gives the proper vibratory movement to the looper S, D representing the driving-shaft, V a cam secured upon it, and W a vibrating arm operated by the cam'V.

We are aware of the patent No. 22,060 granted to Burnet and Broderick on the 30th of November, 1858,`in Which the loop of needle-thread for the passage of the shuttle is obtained by the use of a crank-connection upon the needle-bar which rocks past its center, forms the loop, and then descends during the passage ofthe shuttle through the loop 5 andV we, therefore, disclaim such device.

l. The combination and arrangement of the eccentrics K L, connecting-rods G M, crank 0, shaft E, crank P, and needle-bar Q, and its connection a, and the double-armed lever F, for operating the shuttle and needle, all constructed and operating substantially as described and specified.

2. The double-armed lever F, constructed, arranged, and adapted to Work the shuttle and looper, substantially as described.

3. The locking device, Fig. 4, for changing the positions of the needle and shuttle and the upper and under needle, when the machine is converted or changed from one stitch to the other, constructed substantially as described and specied.

-4.-In combination withlthe above device for changingthe time of the vibrations of the lever F, the slotted disk P for changing the throw of the needle, constructed and operating substantially as described.

' J OHN FANN ING.

EDWARD NUGENT.

Witnesses:

C. A. DURGlN, ROBERCL` M. BERRY.

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