US21461A - Improvement in sewing-machines - Google Patents

Description

J. B. WOODRUPF. SEWING MACHINE.

No. 2 1,461. Patented Sept. 7, 1858.

sew-in sleeves, or any PATE T OFFICE.

J. B. WOODRUFF, OF WASHINGTON, DISTRICT OF COLUMBIA.

IMPROVEMENT lN 'SEWlNG-MACHiNES.

Specification forming To all whom it may concern:

' Be it known that I, JEROME B. WooDnfurr. of the city of Washington, in the District of Columbia, have invented certain new and useful Improvements in Sewing Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which make part of this specification.

Figure 1 represents a side elevation, showing the arrangement of the mechanism. Fig. 2 is the front end elevation, (diminished size,) showing the mode of clamping to the table. Fig. 3 is a side view of the hinged foot-piece and bed with the BX'liGllSl01lI'O(1 attached. Figs. 4 and 5 are detached views of the corrugated spring-tension. Fig. 6 is a view ofthe shuttle bowl and driver. Fig. 7 is a spooler and shuttle-bobbin.

My invention consists in the construction and use of a double corrugated spring to regulate thetension of the needle-thread, which is made to pass between the plates of the spring in the employment of an extension-rod to adapt the machine to tables of varying heights and, also, in the means employed for retaining the shuttle in place, and at the same time to render it easily accessible to insert and remove the bobbin.

To' enable others skilled in the arts to make and use my improved sewing-machine, I will proceed more fully to describe. the same.

Like letters indicate similar parts in all the figures.

A in the annexed drawings represents the table or plate to which the mechanism is secured, and upon which the material to be sewed rests. The front part of the plate B can be removed,which leaves a semicircular form, I), to-

shape not convenient to bear upon a flat surface.

O is shuck or hollow arm, in the form of an ellipsis,

made of cast metal, secured to the rear end of plate A, extending over toward the front sufficient to support the cloth-holder c and camlever d'and helical spring e, in which the needle-arm D vibrates, and is protected when the needle is through the plate. To that portion of the needle-arm that extends under the plate is attached the pitman G, which connects it to the driving-wheel H, whereby a positive, and

di reet motion is given to all the working parts,

they being all moved by the under portion of part of Letters Patent No. 21,461, dated September 7-, 1858.

whetherthe wheel rotates to the right or left. The balanced needle-bar, carrying the needle at one end and operating the shuttle direct by the other, the slotted shuttle-driver, and the shuttle-race are the same as described and patented by me December 23, 1856, so a description here is unnecessarya In the edge of the sm. ller rim of the drivingwheel H is inserted a strip of preparedleather,

the needle-arm,

gutta-percha, orvulcanized rubber, which, com;

ing in cont-act wit-h the smooth surface of the periphery of a-larger wheel, anincreased speed may be obtained, which runs lighter,with less noise, and more power than can be obtained by double the amount of surface brought to bear by either belt-or gear. The spoolerK to fill the shuttle-bobbins, as seen in 7, is made of sheet metal, pressed out in suitable shape and bent at right angles,with notchesto receive the outer ends of the bobbins, they'being journals to run on, and is so placed on the flange that the shuttle-driver hangs on, so to be brought in contact with the friction-wheel H to receive its motion and power for spooling. The cap or bowl, as seen in Fig. 6, in which the shuttle is placed to hold-it in its positionto it's race and carry it through the loop of the needlethread, is pressed out of sheet-steel, and is raised in form by a punch and die, is connected-to theslotted driver by a screw, on which it may be moved down sufficient to take out and replace the shuttle, and when moved up to the top of the racewill secure the shuttle in proper place for operation.

The double corrug. ted yielding spring-tension, as shown in Figs. .4 and 5, is made out of sheet metal, receives its form by suitable machinery, may be placed in or on the needle arm or slide to move with it in the most convenient place, as near as can well be to the needle, so that the thread will be guided b6 tweenthe two as it comes from the spool, passing through an eye in the under spring, and out on the opposite spring at the other end to the needle. More or less tension is given to any kind of silk, twist, cotton, or linen thread, and more uniformity, whether it be-smooth or 1111 even, by being adjusted by the small thumb screw 1), or anequivalent device, than any mode before known or used. The spool-case m, as shown in Fig. 1, may be placed to suit the con-' venicnce anywhere without affecting of the tension of the thread. The fragment of atable. X.

case-hardened l the footpiece o by apin, a the other end havas seen in Fig. 2, presents the front end View of the machine as secured to its top by the thumbscrew Z, under the projecting edge, so that all of the working parts of the machine are in the most convenient position to examine, oil, clean, regulate, and operate. either by the hand or foot, that they can possibly be placed in.

The foot-piece 0 and bed p, with the extensionrod attached, as shown in Fig. 3, are made of cast-iron, and pivoted to the bed-piece P, which rests upon the floor, so that the foot of the operator is balanced under the ankle-j oint, there by making the most natural and easy motion to the foot. The extension-rod, asshown in Fig. 3, is composed of a tube, Q, which is flattened at the end, and a hole through to connect it to Having thus described my improved sewing-1nachine what I claim therein to have invented as new, and desire to secure by Letters Patent, is.

' 1. The double corrugated yielding spring, between which the thread is guided, the same being regulated bya thumb-screw or any equivmanner-described, to produce any degree of tension required.

2. Making the bowl or shuttle carrier and attaching it to the slotted driver, as described, in combination with the circular shuttle-race.

3. The application of extension-rods for pitmen to sewing-machines, when used in combination with a hinged foot-piece to be placed upon the floor and the machine upon table in the manner and for the purposes specified.

JEROME B. WOODRUFF,

in g a tapering screw, on whichis fitted a milled nut, R, which compresses it to the sliding rod J, which forms the connecting-piece to the main driving-Wheel I at the crank-pin z',which also s :rves as the handle to turn themachine when operated by the hand.

At-test:

JOHN S. HOLLINGSHEAD, JNOJH. IGLEHART.

alent device to bear uponthe thread, in-the

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