US272051A - holden - Google Patents

Description

(No Model.)

2 Sheets-Sheet 1.

0. J. HOLDEN & L; GRISWOLD. TENSION DEVICE FOR SEWING MAGHINES.

N0 272,051. Patented Feb. 13,1883.

' 2 sheets- 81188: 2. 0; J. HOLDEN & L, GRISWOLD. TENSION DEVICE PORYSEWING MACHINES. N g. 272.051.

Patented Peb. 13, 1883. m

(No Model.)

- I i W I! F Q A 7 w m WB I & I NAM, Q@ N K. A m 0.1. R Ma h M m m N M L 1 w 1 N 4, 1| MN m W F w. 3 v, lw W ,q

UNITED STATES PATENT ow-I E.

OREL J. HOLDEN, 0F TARRYTOWN, AND LEV GRISWOLD, OF NEW YORK, N. Y., ASSIGNORS, BY MESNE ASSIGNMENTS, TO SAID HOLDEN AND ALBERT H. JOOELYN, OF NEW YORK, N. Y;

TENSION DEVICE- FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 272,051, dated February 13, 1883.

' Application filed Septeniher28,1882. (No model.)

To all whom it may concern:

Be it known that we, ()REL J. HOLDEN, of Tarrytown, in the State of New York, and LEV GRISWOLD, ot' the city of New York, county and State of New York, are the jointinventors ofan Improvement in Tension Devices for Sewing-Machines, of which the following is a specification.

Our improvements consist in tension devices,

whereby, when desired, the tension of the thread is regulated and adjusted to the feeding device, and to the number of stitches required to the inch, by the movement of a crank or arm which regulates the entire tension.

The following is a specification, reference being had to the drawings accompanying the same, in which-- Figure 1 is a front view of a sewing-machine with our improvements, the cap or cover 0 being removed. Fig. 2 is a sectional view, showing the construction of the tension device.

Fig. 3 isa cross-sectional view of Fig. 2 on line as w. Fig.4 is a view atone end, showing the needle, needle-bar, foot-bar, and feed-regulator, not'described herein. Fig. 5 isa side view of a section of tension-rod and nut or arm operating and holding the same. Fig. 6 is a top view, showing arm or nut holding the tensiou-rod and the arm operating the said nut or arm. Fig. 7 is a side view of the arm by which the tension-rod and devices are regulated; and Fig. 8 is a front or face view of same, as shown in Fig. 7; and Fig. 9 is aplan view ofshield and guide for the take-up and thread.

Ais the frame or body on which the devices herein described are mounted.

Bis the driving-wheel, which is the same usually found in sewing-machines.

O is a cap or covering, which covers the 0 crank or bar and arm, hereinafter described.

' D is the driving-shaft, receiving its motion from the driving-wheel.

E is a rod, one endof which holds a wheel,E, having a finger-piece, e, whereby the tension 5 is adjusted, and which also adjusts the feedin g-regulator G, which is attached to the other end of the said rod E. The main shaft D works in and through a sleeve, 01, which is shown in Fig. 1. Y

F is the connecting'rod, usually found in sewing-machines, for communicating motion sion is to be changed.

to the needle-arm H, which arm has the usual arm found in sewing machines, and both worked in like manner, as in other machines.

To one side from the center of the finger- 5 wheelis attached, by means of the screw h, the arm I, the other end of said arm I being attached to the arm J by means of the screw 0', whereby said arm is moved up and down. The other end of arm J is held fast to the rocking arm H by screwj, and works on said screw as a pivotal point as it moves the tension bar or rod K up and down. The tension-rod Kis fixed, by means of male and female screws, into the arm L, which arm is fastened fixedly to the center, or thereabout, of arm J by means of screw 7:, so that every motion of the arm J imparts a motion to the rod K, and raises or 1owers it through the thimble or sleeve M.

On the lower end of the rod K is fastened 0 a nut, m, for the purpose of more securely fastening the rod K into the arm L.

In the sleeve M is the spiral spring N, held therein by the cap 0, which sets over the spring N and has less longitude than the sides of the sleeve, so that at the greatest depression of the rod K the ends of cap 0 never touch the bottom of the sleeve M. Through a hole in this cap the rod K passes up through and above the sleeve M, and has adjusted on its end, or near its end, the glass disks 1? P. I Between thesedisks the thread passes. Above these disks, and where the rod K is thrown up ,to its greatest height, is fixed thethimble-cap R, which is screwedonto the end or otherwise 83 fastened to the upper end of rod K. It is more desirable to have it thus secured, that it may be removed.

Rightbelow the screwnut m is a loose sleeve, which rests on the arm L, into which screws the rod K. It may be dispensed with, and is only attached to prevent the screw m from coming in contact with arm J at a point where the arm is attached and works on the screw j.

T is a rod securely fastened to wheel E by link or otherwise, and passes up behind the cover 0, parallel with arm I, and serves as an indicator bya required movement for regulating and adjusting the wheel E when the ten- Other devices suitable thereto may be employed.

On the end view we indicate the take-up by Fig. 1, which is fastened at its top to piece 2. The other end is free, and by its loop 3 holds the thread in its passage down into the'needle. On the take-up is the projection 4, which occurs between the two curves formed on the face of the same on the side facing the needle. On the needle-bar is placed the pin 5, on which,

is secured theloose pulley 6, so that this takeup always rests against the pulley, and is pushed back from the needle as the needle-bar goes up and down, and yet the thread pulls it forward toward the needle-bar when the hook takes up the slack thread and the pulley 6 has passed either side of point 4.

We have shown in Fig. 4 other parts of a sewing machine, which embrace new devices, for

which we intend to file applications for Letters Patent. The same consists of a rotary hook,

w hich is fastened to and receives its motion from inch.

1n operating the tension device the thread passes from the spool through the loop in support at W on the frame of the machine. The thread then passes between the disk P and P, and from thence passes down through the thread-guide W on the needle-bar, through the take-up in loopS, to the needle. as the needle-hook (which may be of any kind usually employed) allows the thread to be loosened in' forming the stitch, which will occur as the needle is raised up from making the last stitch, the take-up is pushed out from the needle-bar having the loop W, and the needle- .bar, in rising, throws the take-up out when the pulley 6 strikes the point 4 and so takes up the slack thread. Now, as the needle-bar descends, the loop W descends with it, and by thetime the needle has entered the material to make another stitch the take-up has approached the needle-bar, the pulley 6 having passed the point 4, and thus slack is given for -the forming of the next stitch; but it is desired to allow more slack thread to the takeup, and to do so change the tension. The handle 6 is turned up and the wheel E is turned till the rod T byits fingerindicates on dial V the proper tension is obtained and the stitch required is fixed. By turning up the handle 6 the arm I has been thrown up, thus raising the end of arm J, to which is fastened arm I. This has likewise raised the end of the arm L where it is attached to the arm J, and has raised also the other end of the arm L, wherein is fixed the rod K, thus pushing the rod K up through the sleeve M, and thus relieving the pressure on the disks P and P As soon on the cap 0, which is pressed up by the extension of the spring N. The disks do not now hold the thread so tenaciously, but grasp it from the spool and loosely hold it for the use of the needle. To increase the tension the reverse movement is made. The arm or handle e is turned down until the rod T indicates on the dial that the desired length of stitch is obtained. By the lowering of the arm 0 the rod I has been pulled down, and with .it the arm J, arm L; and'the rod K is pulled down through the sleeveM, compressingthe cup 0 over the spring N, which resisting the pressure-forces the disks P and P up against the thimble It. Thus the grasp of the disks on the thread is increased, andof course the tension is made greater. Now, the desired tension obtained, the rocking arm H, as the needle is operated, raises and lowers the rod K, and its devices, as it rocks, by raising and lowering the arm J and arm L; but the disks are held just so much the tighter or looser as the bar I has been raised or lowered. This rocking motion of the bar H of course allows the thread to be grasped and pulled through either for along or short stitch, as desired, and regulated. It will be seen, however, that the bar I has no motion except as it is moved by the crank or handle 0, and does not partake of the motion of the machine. Thus it will be seen that we have an adjustable tension which never requires alteration, and by the simple movement of the handl'ee is stitch.

We do not claim the feeding device here, as we claim the adjustment of the same and other devices in applications made by us for patents for the same, as found-in our application ,for patent for sewing-machines filed October 10, 1882, Serial No. 73,900.

Having thus described our invention, what we desire to secure by Letters Patent is-- 1. In a sewing-machine,the tension device composed of the wheel E, rod I, arm J, and arm L, rod K, with disks P and P, sleeve M, with the rocking arm H, substantially as shown and described.

adjusted to any 2. In a sewing-machine, the tension devices consisting of the wheel E, having handle 0,

rod I, arm J, and arm L, operated and fixed OREL J. HOLDEN. LEV GRISWOLD.

Witnesses:

B. S. CLARK, A. H. J OCELYN.

Images