US100139A - Improvement in sewing-machines - Google Patents

Description

3 Sheets-Sheet 1.- W. 0. GROVER.

. Sewing Machine.

No. 100,139. Patented Feb. 22, 1870.

3 Sheets-Sheet 2.

w. 0. GROVER.

Sewing Machine.

No. 100,139. Patnted Feb. 22,1870.

N4 PETERS, Pholo-Lmwghpher; Washington, D. c

' v '3 SheetsSheet- 3. W. O. GROVER.

Sewing Machine.-

Patented Feb. 22 1870.

Non 100,139.

illadmit swa WILLIAM O. GROVEB, OE BOSTON,MASSACHUSETTS.

Letters Patent No. 100,139, dated February 22, 1870.

IMPROVEMENT IN SEWING-MACHINES.

The Schedule referred to in these Letters Patent and making pert of'the same.

To all whom it may concern Be it known that I, WILLIAM O. Gnovnn, of Boston, in the State of Massachusetts, have made an invention of certain new and useful Improvements in the Construction of Sewing-Machines, and that the following is a full, clear, and exact description and specification of the same.

The object of my invention is to enable the drivingpower to be applied to a sewing-machine at the side thereof which is behind the axis of the needle-arm, while the needle-arm and the looper are constructed to operate substantially as those instrumentalities operate in the Grover 8: Baker. family sewing-machines nowin common use.

To this end my inventioutconsists of the combination of the following three instrumentalities, viz:

First, a vibrating double-headed arm, which operates the needle from above the table of the sewingmachine, and also extends beneath the said table, and is connected with a vibrating looper so as to operate it.

I Second, a driving-shaft arranged with, its axis parallel or thereabouts with the plane of vibration of the said vibrating arm.

Third, a vibrating eye-pointed looper to inter-chain a second thread with the thread carried by the needle.

My invention consists further ot' the combination of the aforesaid three instrumentalities with a reciproeating toothed advancing-instrument for moving the cloth or material to be sewed past the needle.

Mysaid new combinations are embodied in the sew-- ing-machine represented in the accompanying draw- 1ngs Figure 1 representing a plan of the machine with the bed-plate and parts above it removed;

Figure 2 representing a vertical longitudinal section of the machine; and

Figure 3 representing a vertical transverse section of firebox-stand at the line x a; of fig. 2, showing parts of the machine beneath the bed-plate.

In the said machine the needle is carried by a double-headed vibrating arm, A, which is constructed with a rock-shaft, c, that is arranged to vibrate upon centers secured to the bed-plate B.

One branch, d, of this arm extends beneath the bed-plate, and carries at its front end the driver f, by means of which motion is imparted to a vibrating eyepointed looper, m, which is secured to the upper end use, and therefore'need not be more particularlydescribed.

The driving-shaft 1* extends under the bed-plate, and its axis is parallel with the plane of vibration of the arm A. v

The cam G, for operating said arm, is secured to this driving-shaft, and the pin II, by which motion is imparted from the cam to the vibrating arm, projects laterally from the said arm into the groove n of the cam. The stem of the pin is fitted with a frictionwheel or bowl in the usual manner.

The cam groove am this instance is so formedas to cause the vibrating arm A to make two complete double vibrations for each revolution of the cam, but this construction of the cam groove forms no partof the invention.

The front end of the driving-shaft F has two cams 7c 1 secured to it, for the purpose of imparting motion to the advancing-instrnment I of the scwing-mzwhine,

one of said cams (Ii) operating to raise said instrument and to permit it to descend, and the other cam (l) operating to move said instrument horizontally in one directiim, a spring, t, being applied to move it hori- Auntally in the opposite direction, so that the said instruincnt has a reciprocating motion imparted to it.

The operating surface of the advancing-iustrument is roughened by small teeth, in the usual manner, and the construction of the stock J of said instrument and its appurtenances are, in this instance, the same as the corresponding parts of the Grover Baker family sewing-machine. I

The driving-shaft F extends beyond the side I) of the machine, which is behind the rock-shaft 0, whose axis is the axis of vibration of the needle-arm A, and the 'proj ecting extremity of the driving-shaft is fitted with a fly-wheel, E, to one of the arms of which a crank-handle, g, is secured for the purpose of enabling the machine to be operated by. hand. i

If the machine is to be operated by power, the crank-handle is removed, and a pulley is secured to the outer side of the fly-wheel or to the extremity of the driving shaft to receive the driving-belt.

-The bed-plate B forms the top of a box, 0, which contains all the parts of the machine that require protection, and forms a convenient case by which they are protected from injury, and it also sustains the flywheel E at such a height above the legs of the boxstand that the machine may be set upon any ordinary table and operated by hand.

Having thus described a sewing-machine embodying my invention, I declare that I do not now claim severally the separate instrumcntalities of which my combinations are composed, but'what I claim as the invention to be secured by these Letters Patent is- The combination and arrangement of the doubleheaded vibrating arm, the driving-shaft, having its axis arranged parallel to the plane of vibration of said arm,'and the vibrating eye-pointed looper, the

whole constructed to operate substantially as before set forth.

Also, the combination and arrangement of the dollhle-headed vibrating arm, the drivingshaft, having its axis arranged parallel to the plane of vibration of said arm, the vibrating eye-pointed looper, and the reciprocating toothed advanoing-instrmnent, the

whole constructed to operate substantially as before set' forth.

In testimony whereof, I have hereto set my hand this 3d day of March, 1869.

Witnesses: W. O. GROVER.

JAMES H. Baowx, J;- MEs O. \VADE.

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