US128770A - Improvement in sewing-machines - Google Patents

Description

Sewing-Machine..

N0. 128,770, 4 Patnted .luly 9,1872...

' v 74/77 n/ ss'es v 4 Sheets--Sheet 2.

E. P. WEST.

Sewing-Machine.

4Sheets--S-heet3.

E.P.WEST. Sewing-Machine.

Batman my e, 1 872.

E. Pl WEST.. LSheets-Sheet4. A

Sewing-Machine. No. 14128,-770. Patentedlulynsm'.

NITED STATES IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 128,770, dated July 9, 1872.

SPECIFICATION.

To all whom it may concer-n:

Be it known that I, ELLIOTT PENDLETON WEST, of Jersey City, Hudson county,and.State' of New Jersey, have invented a neuT and useful Improvement in Sewin glMachi'nes; and I hereby declare that the following is a full, clear, and exact' description thereof,'reference bcving had to `the accompanying drawing making a part of this specification, and the letters of reference marked thereon, in which the same letter represents the same thing in each figure.'

Figure l represents a side elevation of a sewing-machine with my invention applied.. Fig. 2 is a top view or plan ofcertain parts l,with the cloth supporting table removed.

Fig. 3 is a detail section through the drivingpulley, showing the operations of the clutch with the notch' on' -the driving-pulley. Fig. 4 is a section taken just in front of the eccentric. Fig.V 5 is a side elevation of certain parts. Fig. 6 is an end elevation of the same, and Fig. 7 an-end elevation of the same with the driving-pulley removed.

My invention is an improvement upon the invention for which Letters Patent N o. 117,708

were granted me by the UnitedStates August `J, the clutch wheel; K, the clutch-opening roller; L, its arm; M, the presser-foot leverlifting roller; N, the lifting-lever, pivoted on stud O; P, the connecting-screw; Q, the footbar; It, the roller-arm cam; S, the rollerarm shaft;` T, the stophook; rw, its spring; V, the stopeccentric; W, its ring; w, its connecting-lever; y, the stop-crank; z, the ratchetshaft; 1, the ratchet; 2, the pawl; 3, its arm; 4, its spring; 5, the ratchet-connecting lever; 6, the operating-pulley crank; 7, the stop-hookf holding pin; 8, the stop -hookcontrolling cam; 9, the spring ratchet wheel friction-pin.

The operation is as follows: The revolution of pulley F by connecting-lever 5 and arm 3 operates ratchet and pawl 1 and 2, and through shaft z rotates cam 8, which de presses hook T 'to catch on pin ,7, and holds eccentric ring W, so` that it, by connectinglever .fr and crank y, moves shaft S and .arm L, causing clutch-opening roller K to press in clutch G, thereby freeing notch H, and permitting pulley F to run-loose on shaft C. Shaft S at the same time moves cam R upon roller M attached to lifting-lever N, and so raises the presser foot by screw I. The operative parts of the machine are now stationary. Pulley F, continuing its revolutions, by the connections before explained, rotates shaft z, and spring w lifts hook T, and cam 8, through ring W, connecting-lever w, crank y, shaft S, roller-arm L, and roller K, releases clutch G, the spring I of which throws itshooked end into notch H and re-establishes .the connection of pulley F with main shaft C. When arm L releases clutch G the revolution of shaft S also releases cam R from roller M, and the 'prsserfoot falls...A In this manner the machine will run a certain number of stitches, stop to permit the turning of the cloth, and automatically resume its action for the same or a different num# ber of stitches, the number of stitches taken at any one time before stopping being dependent upon the form of cam 8 and the.. arrangement of the teeth on ratchet-wheel 1 to control its action.

In the drawing, connecting-lever '5 is hung4 on arm 3, near the center of the ratchetwheel, and the cam 8 is adapted to stop the operative parts of the machine after-six stitches are made, andcause them to resume their action after. .pulley F has revolved times FFICE.

enough to make six more; but, if eonnnecti ing-lever 5 lis hung in the screw-hole in arm 3 farther from the center of the ratchet-wheel shown in the drawing, the machine would mfaire twelvestitehes before stopping instead o six.

What I claim, and desire to secure by Letters Patent, i:s-h The mechanism described and shown, or equivalent devices thereof, to automatically -2 iesgwo operate the eiutlch, disengaging, and presserfoot-lifting mechanism, after a determined number of stitches, and cause a reengagement of the clutch and I )resser-foot;v after a certain number of revolutions of the drivingpulley, substantially as shown.

ELLIOTT PENDLETON WEST. Witnesses:

S. J, GORDON, JOHN W. RIPLEY.

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