US7296A - Improvement - Google Patents

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N0. 7,296. PATENTED APR. 16, 1850.

D. M. SMITH. SEWING MACHINE.

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No. 7,296. v PATENTED APR. 16,, 1850. 1); M. SMITH.

SEWING MACHINE.

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UNITED STATES PATENT OFFICE.

THOS. CHADBOURNE, ASSIGNEE OF 1). M. SMITH, 0F SPRINGFIELD, VERMONT.

lM'PROVEMENT iN SEWlNG-MACHINES.

To' all whom it may concern.

Be it known that I, DAVID M.- SMITH, of Springfield, in the county of Windsor and State of Vermont, have invented a new and useful or Improved Sewing-Machine; andI do and represented in the following specification and accompanying drawings, letters, figures, and references thereof.

.Of the said drawings, Figure 1 denotes a top view of my said machine. ,Fig. 2 is a side elevation of it. Fig. 3. is a central, vertical, and' longitudinal section of it. Fig. 4 is'a transverse section of it, taken through therack andpinion. Fig. 5 is a top view of the needle.

In the said figures, A'represents a long hori- ,zotal bench or bar, supported on legs at its ends, as seen at BB. A tongue or guide rail, (3, is made to extend from end to end of it, to project somewhat above its top surface, and to enter a corresponding groove formed lengthwisefof a sliding rack-bar, D, the same serving to guide the said rack-bar and preserve its correct position during its'movements. The

- said rack-bar rests and moves on a friction-1 and throughout the bar a long passage or space, i, is made for the reception of the needle F; This passage is'open at 'top,;'or, in otherwords, the bar has a narrow .slot, 9, extendingdownfrom the middle of its top surface into the above-mentioned passage, the said slot being intended not only to receive a fiat or thin pin, h, which is passed down into it and through the rear eye, 70, of the needle F, but to allow of the movements of the rack-bar while the said needle and its holdfast or pin are stationary. Thesaid holdfast h is supported-by an arm or strut, 1, which extends upwardfrom the bench A, and over the upper surface of the rack-bar, and has a set-screw, m, applied to it, so as to holdor fasten the pin h to it.

A small gear-wheel or pinion, G, operates in connection with the rack of teeth of the rack-bar. It is placed directly over the friction-roller E, and is fixed upon a horizontal axle, n, which passes through and revolves ina bearing-tube, 0, supported by a standard, 12,

made to extend up from the bench A. The. hereby declare that the same is fully described pinion and its shaft may be revolved by a per- Son applying his hand to and turning a crank,

H, which is fixed on one end of a shaft, 12..

The periphery of the pinion G has a groove,

g, out down into it and entirely around it and' centrally, so as to admit the teeth of the pinion to pass down by or embrace the needle on its sides. Besides an eye at the rear end of the needle, as above stated, the needle is provided with another eye, 1-, which passes throughit .very'near to the point or front end of it, as-

seen in Fig; It is through this latter eye that one end of the thread with which the cloth is to be sewed is passed, the said thread beupon a stationary stand or support,

Vhen'cloth to be'sewed is placed upon the top surface of the teeth of the rack-bar, and the pinion is" put in motion in the direction de noted by the arrowihereon in Fig. 2, the said cloth will be pinched between the teeth of the pinion and rack-bar and corrugated thereby. The point of the needle should stand in such close proximity with those teeth of the pinion and rack-bar which may be in action that the corrugations or doubles, as fast as they are formed, may be forced onto the needle; or, in

ing wound upon a revoluble bobbin, .9, placed other words,-'the point of theneedle'may be made to successively pass through them. The. needle in thus passing through the cloth car ries the thread with it, the thread being denoted in the .drawingsby a'red line, as seen at u. 'As soon asthe whole length of the cloth has passed upon the needle, we start the rackbar a little, and so. as to enable us to seize or take hold of the end of the thread, which was previously passed through the needle. By holding on to the end of the thread while we give a' retrograde movement to the pinion and rack-bar, we cause the cloth' to be drawn off the needle, and the thread to remain in the cloth and sewed therein with a running stitch.

\Ve next draw the thread a little farther throughthe eye of the needle and separate it, so as to leave the needle still threaded and ready for another operation;

By the above method of making theneedle stat-ionalfyand supporting it within a long reneedle of my machine.

cess formed in the raclrbar, and threading it near its point, a needle of an y desirable length as well as a rack-bar of a length to correspond thereto,may be employed. Sewing may be accomplished by the same in a very expeditious manner, the machine so made being particularly adapted to the stitching or sewing of bags, the covers of nmbrellairames, as well as various other articles.

' I am fully acquainted with the sewing-mafchine as patented by Benjamin XV. Bean, by reissue on the 10th day of March, A. D. 184.0. In such-machine the thread-eye of the needle was placed at the rear end of it, and not in the-vicinity of the point of it, as it is in the Consequently in such machine of the said Bean the thread did not pass into the cloth simultaneously with the needle as it does in my machine; but after the needle had entirely passed into the cloth, the corrugations of the latter had to be drawn over the thread by the hand of an operative, In machine each corrugation or folding of the cloth is supported by a tooth of the rack har,

and it is. moved over or upon the needle and needle--in eomhination with the atone-deserihed manner of supporting the needle, and applying it to the machinery which produces the mrrugnlions or fohilings of the cloth, not

meaning to lay claim to the combination of a needle. and gears, or other anologous contriv' auees for producing sewing, as the same have heretofore. been applied and used, but meaning only to claim my improvement as'eonstructed, and made to operate substantially as above speeilied.

In testinlony whereof I have hereto set my signature this lst day of December,A. D. 1849.;

DAVID M. SMITH. Wit nesses:

SAML. KPORTER, HENRY F. GRAIN.

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