US331204A

US331204A - march

Info

Publication number: US331204A
Authority: US
Publication date: 1885-11-24
Anticipated expiration: 1902-11-24

Description

(No Model.) 2 Sheets-Sheet 1.

M. MAROIL.

MECHANISM EOE AOTUATING NEEDLE BA'R$.

No. 331,204. Patented Nov. 24. 1885.

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2 Sheets-Sheet 2.

(No Model.)

M. MARGIL. MECHANISM FOR AGTUATING NEEDLE BARS. No. 331,204.

Patented Nov. 24. 1885..

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MICHEL MAROIL, OF AMHERST, MASSACHUSETTS, ASSIGNOR TO THE HILLS COMPANY, OF SAME PLACE.

MECHANISM FOR ACTUATING NEEDLE-BARS.

SPECIFICATIQN forming part of Letters Patent No. 331,204, dated November 24, 1885.

Application filed September 15. 1884, Serial No. 143,133. (No model.) v

To all whom it may concern:

Be it known that I, MICHEL MAROIL, of Amherst, county of Hampshire, State of Massachusetts, have invented an Improvement in Sewing-Machines, of which the following description, in connection with the accompany-- ing drawings, is a specification, like letters on the drawings representing like parts. I The invention herein contained relates es- IO pecially to improvements in mechanism for actuating the needle-bar, my invention being an improvement on the machine represented in United States Patent No. 292,124.

My invention consists in a needlebar-actu- I 5 ating rock-shaft, its attached rocker, a needlebar, its connected link and horizontally-extended pin, and a block pivoted thereon, combined with a guide into which the said block is extended, as will be described; also, in the combination, with the main shaft, its attached wheel, eccentric, eccentric ring and gib, and pin having a ball-like head and a rock-shaft, and a connecting-rod to join it with the pin, of a needle-bar and connecting mechanism between it and the needle-actuating rock-shaft,

substantially as will be described.

Other features of invention will be described in the claims at the end of this specification.

Figure 1 in side elevation represents a sewing-machine embodying my improvements; Fig. 2, a front end elevation thereof, part of the gage-adj usting device being shown as broken out; Fig. 3, a top or plan View; Fig. 4, a section in the line 00 m, Fig. 1, looking toward the left; Fig. 5, a section of Fig. 4 in the line as m. Fig. 6 is a section of Fig. 5 in the line 00* as, showing the eccentric and other parts to be described which form part of the mechanism for actuating the needle-bar. Fig. 7 is a partial vertical section in thelines :0, Figs. 3 and 1. Fig. 8 is a detail in side elevation, partially broken out to illustrate the guide employed to prevent the needle-bar from be ing rotated as it is reciprocated; Fig. 9, a section of Fig. 8 on the line 00 x and Fig. 10, a detail of the auxiliary presser-bar and the main presser-bar and its spring.

The frame-work A of the machine, of proper shape to sustain the workingparts, has amain bar A for the formation of a chainstitch. The

shaft A, at its rear end, is provided with a wheel, A properly shaped to receive a driv- 5 'ing-band,,the said wheel being provided atits inner side with an eccentric groove, a, in which are placed semicircular gibs a a, which are held in place by the screws a the said gibs being V- shaped in cross-section, and serving as guides for the eccentric-ring a which surrounds theeccentric a attached to or forming part of the saidwheel, as best shown in Figs. 4 to 6. The eccentric-ring a is provided with a seat for the reception of the ball-like head I) 6 of a pin, b,- wh'ich is secured loosely in place in the said ring by screws 7) acting against a cap, I). (See Fig. 6.) The pin 12 receives over it the socketed lower end of the connecting-rod bfiattached to the arm 0 of the needlebar-actuating roclcshaft c by the tapering bolt 0, the said rod and pin being secured to gether by the set-screw b (See Fig. 4.) The connecting-rod bhas a cross-head, b, to which are secured two guide-rods, c", which at their lower ends enter guides or eyes 0 c ofa collar, 0, loose on a bushing, a, about the main shaft A. Preferably the inner face of the wheel A will be covered by a stationary cap, 0 joined by pins 0 to the main frame A. 13yv the employment of the eccentricring and the pin having the ball-like head, to which the connecting-rod is pivoted, the movement of the latter is produced with the least amount of strain and vibration. By the employment of the pin having the ball-like head all irregularities in strain between the connectingrod and ring are obviated. The needle-bar-actuating rock-shaft, at its front end, is provided with a rocker having two arms, d 02, secured thereto by a screw, (1 The arm d of this rocker is connected by link (1 with a pin, (2*, projecting from the needle-bar A at its rear side, the said pin at its rear end entering a socket of a block, (i having two 5 straight sides and fitted into a vertical guide, d, attached to or forming part of the frame work, such block and guide insuring the movement of the needle-bar in its guides in the head without twisting, and also obviating draftstrain on the link (P. The arm d of the rocker is adapted as the needle-bar descends to act upon the screw 6 of the arm 6, pivoted on the auxiliary presser-bar a which is adapted to slide up and down in the guides 6 forming part of the rigid frame-work. This auxiliary presser-bar (see Figs. 1 and 10) has attached to it a forked arm or finger, 6 which is extended laterally to and past the main presserbar f and under the usual spiral spring, f, which normally acts to keep the presser-foot f 2 ,attached thereto, down upon the work. The arm 6 is provided with a head having two flat faces, anda spring, f attached by screw f, acts against one or the other of the said faces to hold the said arm in either of its two positio'ns.v When a hat is to be commenced at the tip of the crown, the braid, while the needle is down, should be subjected to the least possible pressureto permit the Work to be turned on the needle as a center, and to provide for this the arm 6 may be turned into the position shown by dotted lines, Fig. 3, and thereafter the arm at at each descent of the needle will act upon the arm 0 or the screw '6 therein and lift the bar 6 so that its attached arm e will by its action on the spring f relieve the regular presser-footf and its bar of the pressure of the said spring.

The presserbar lifting device referred to forms the subject-matter of an application, Serial No.171,320, and the feeding. mechanism shown, as also the gage, form subject-matter of two applications, Serial Nos. 171,319 and block pivoted thereon, combined with the guide into which the said block is extended, substantially as described.

2. In a sewing-machine, the main shaft, its attached wheel and eccentric, and the eccentric ring and gib, and the pin having a balllike head and entering a seat in the said ring, and the connecting-rod and the needle-bar-actuating rock-shaft and its rocker, combined with the needle-bar and intermediate connecting mechanism, substantially as described.

3. The main shaft A, the wheel A its eccentric and the eccentricring, and the pin 1), having the globular head, and the cap If, attached to the eccentric-ring loosely and holding the pin, combined'with the needle-bar-actuating rock-shaft and the connecting-rod b, to operate substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' MICHEL MARGIL.