US19660A - Improvement in sewing-machines - Google Patents

Description

2 Sheets-Sheet 1.

J. B. HENDRIOK.

SEWING MACHINE.

No. 19,660. Patented Mar. 16, 1858. 7

2 Shets-Sheet 2.

J. E, HENDRIGK.

SEWING MACHINE.

No. 19.660. Patented Mar. 16, 1858 THE NORRIS PErEns co, wow-Luna; wasumm'on, n. s.

- or other fabric to be sewed.

UNITED STATES PATENT OFFICE.

JOSEPH E. HENDRIOK, OF BROOKLYN, E. 1)., NEW YORK, ASSIGNOR ro HIM- SELF AND-WILLIAM HOLMES, 0F sAME rLAoE.

IMPROVEMENT IN SEWlNG-MACHINES.

Specification forming part of Letters Patent No. [9,660, dated March 16, 1858.

To all whom it may concern.-

Be it known that I, J OSEPH E. I-IENDRrcK, of Brooklyn, Eastern District, in the county of Kings and State of New York, have invented certain Improvements in Sewing-Machines, the construction and operation of which I have described in the following specification and illustrated in the accompanying drawings with sufficient clearness to enable comp'etent 'andskillful workmen in the arts to which it pertains or is most nearly allied to make and use my invention.

My said invention consists in, first, a combination of parts, hereinafter described, which constitutes a reciprocating rotary feed above the bed or table upon which the cloth upon which the work is to be performed is placed; second, the peculiar construction of the looper which receives the loop and delivers it to the needle. and. in its connection with other parts described, as set forth, by which a more efficientaction and cheaper construction are obtained; third, attaching the thread-spool to a carrier which is allowed to rotateunder the control of an adjustable iriction-brake, as herein more fully: set forth.

- In the accompanying dravfvings, Figure 1 is a side elevation of my improved machine. Fig.2 is an end elevationof it. Fig. 3 is an inverted plan, showing the under work. Fig. 4 is a' detail view, showing in some respects the mode of operating the loop-former. Fig. 5 is also a detail view showing in elevation the cams which give motion to the working parts. Fig. 6 is a detailview showing the loop-former in a different position from that shown in Fig. 3.

AL-is; the bed-plate of the machine. B is the upright in which the needle-beamis' hung. G is the cam-shaft. D is the needle-beam. Most of the parts aremade in the usual manner in which such parts of sewing-machines are made.

A segmental pad ishuug upon a journal at a, which attaches it to a slide-bar, F, which, by, means of the spring I), keeps the pad E down to the clot-h. An arm, (I, is attached-to the pad to which arm the slide G is attached to give the necessary feed motion to the cloth This is done by the armH, attachedto theueedle-beam, striking against stops 0 andf on the slide G-the As the neeble continues to rise this loop-former is pushed forward and turned over by the cams, which operate in such a manner as to I open the loop for the reception of the needle when it shall again descend through the cloth. This position of the loop-former is shown in Fig. 6. As soon as the descent of the needle has secured the loop the loop-former is turned so as to bring the hook i downward to allow it to pass the needle when it is withdrawn,

and the loop is thus released. The loop-former then goes on to secure the next loop in the same manner, one of. the thin edges of the fork at the endof the loop-former passing in each case between the needle and the thread as the latter slacks, and causing the thread to enter the fork.

The longitudinal motion is given tothe loopformer by the lever L, attached to the end of it, which is operated by the cams J, attached to the cam-shaft, said loop former being so hung in its bearings as to be allowed to slide in the manner above stated. The rotation to turn the hook into the position required is secured by the cams K, operating the rack M, which meshes into the segment of a pinion on the shaft of the loop-former.

The thread-spool N is placed upon a shaft, 0, and secured to the disk P by two pins or points, na, which are set in the disk and pro j ect a short distance from it for that purpose. The rotation of this disk- P, and-consequently the tension of the thread, is controlled by a spring-friction brake, which is made adjustable by the thumb-screw Q, as shown in the drawings. I The thread spool is driven up against the pins or points a a by the nut T, which secures it firmly to the disk. The journal of the shaft 0, to which the disk P is attached, has its bearing and suppbrt in the bracket R.

I am aware that a rectilinear motion has been'given to various devices for securing the loop, and I am also aware that a rotary motion has been given to other eontrivances for the same purpose. I am further aware that a rotary motion has been given to a looperwhich vibrates in the arc of a circle; but this arrange ment, while it secures the rotation of the looper, is open. to the objection that the longitudinal motion of the looper is not in a right line, and that its position relative to other parts is consequently so changed while giving the rotation as to interfere seriously with its perfect operation, which is not the case with my machine. I am also aware that a rib rating feeding-pad has been operated upon an axis placed above the bed uponwhich the cloth is laid, but which pad is not concentric with the axis, and doesnot have a uniform pressure upon the cloth,-

' subject entirely and only to the spring or other device by which it is held down upon it.

' 1 I am also aware that the rotation of 'the spool and the tension of the thread has been controlled bya friction-brake placed in direct contact with the spool, various instances of which might be cited. -The difficulties to which this is exposed are, first, the spoolheads are not always or generally smooth andtrue in their configuration, and the adhesion of the brake and consequent tension of the thread are, for that reason, constantly changing, which of course interferes with the perfection of the work; and, second, that spools difler somewhat in size, and the brake has to be adjusted to the size of every fresh spool. Toobviate these difliculties to some extent a pair of conical chucks have been placed upon I the shaft, the lower one, or the one farthest from the outer end, resting upon a spring intended to act. as a friction-brake, the tension of the thread being adjusted by screwing down the outer cone against the spool. This arrangement is unsatisfactory for the reason that the numerous points of contact by which the tension is. regulated are liable, in chucking the spool, to assume a positio'n'out of truth, and as the result the tension of the thread is changing at every stage; and, besides, the rotation of the outer chuck upon the adjusting-nut is apt to turn it upon the shaft, so as to. increase or decrease the tension of the spring-brake; and, still further, the tension has to be, as before, adjusted in attaching every fresh spool. Inmy machine the changing of a spool has no effect upon the action .of the brake, nor can it change the position of any of the parts by'the' friction of which the tension of the thread is. governed, and no displacement of the'parts or derangement of the'ten'sion can be produced by the rotation of the spool.

The particular improvements which constitute my said invention, and which I claim as having been originally and first invented .by

me, are- 1. A concentric rotary feeding-pad vibratingupon an axis which yields to pressure in jected to the action of a toggle-joint, as set forth.

2. The combination of an adjustable spring friction-brake with a rotary thread-carrier, consisting of the shaft 0, disk P, and points or pinsn n, or their equivalents, as set forth.

JOSEPH E. HENDRICK. Witnesses:

J OHN GIBBs, E. O. REMER.

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