US701871A - Button-sewing machine. - Google Patents

Description

No. 701,371. r 4 Patented June I0, I902.)

V 'A. GIACOMINI. A

BUTTON SEWING MACHINE.

(Application filed July 5, 1901.)

4 Sheets-Sheet I.

(No Model.)

IQVVENTOR.

fin ATTORNEY.

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4 L suits- Sheet 2,

Patented June I0, I902; 4

(Application fllqd July 5, 1901.)

BUTTON SEWING MACHINE.

ATTORNEY.

INVENTOR.

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WITNESSES; v

No. 7u|,a7|. Patent ed June 10,1902.

A. GIAGOMINI. BUTTON SEWlNfi MACHINE.

(Application filed July 5, 1901.

4 Sheets-Sheet 3.

(H 0 Model.)

IJNVENTOR.

WITNES SES,

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No. 701,871. v Patented June l0, 1902.

. A. GIACOMINI.

' BUTTON SEWING MACHINE.

1 (Application filed July 5, 1901.;

1N0 Iodal.)

4 Sheets- Shut 4,

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UNITED I STATES PATENT OFFICE.

AoHiLLE's erAooMIN OF SAN FRANCISCO, CALIFORNIA, AssIGNoR T0 ANDREW WHITE, OF VALLEJO, CALIFORNIA.

BUTTON-SEWING MACHINE."

sPEqIFIcA'rIoN forming art of Letters Patent No. 701,871, dated J'une' 10, 1902.

, Application filed July 5, 1901.

Improvements in Button-Sewing Machines,

of which the following is a specification. 1

My invention relates to improvements in button-sewing machines, the same being im-- provements on the button-sewing machine invented by F. T. Leilich and patented October 9, 1900, No. 659,537, the object of my invention being to simplify the construction of the machine and to render it'easier to operate, adjust, and keep in repair.

My invention therefore resides in the novel construction, combination,"andarrangement of parts hereinafter fully specified, and par- I 5 the-button having been held stationary in the ticularly pointed out in the claims.

In the accompanying drawings,'-Figure 1 is a front elevation of my improved" machine. Fig. 2 is a rear elevation of the same. 3 is a horizontal section on the line AA of Fig. 1.

the shaft carrying the ratchet-wheel. Fig.5

is a plan view of the clamp, the cover being. removed. Fig. 6 is a side view of the spring actuated lever for retarding the motion of the machine before arresting the same. Fig. 7 is a side view of the driving-pulley. Figs. 8

and 9 are side views of the clutch. Fig. 10 is a side view of the cam-wheel. Fig. 11 is a cross-section of the clamp-carrier on the line. OOofFig.5.

The hollow arm a of the machine is ingeneral of the usual construction and carries Within itself the main driving-shaft b, which by mechanism common to this class of machines reciprocates the needle to make the stitches. From said driving-shaft there is actuated mechanism for shifting the needle 7 from one eye of a button to another to sew the button onto the cloth,and such mechanism is as followsb Said driving-shaft has mounted thereon afbevel-pinion c,-meshing with a bevel-wheel 01, formed on the'inner surface of a cam-wheel e, said wheel e being mounted on a study, screwed into abridge g, formed integral with the hollow arm wet the machine. Said cam-wheel has in its front face a cam-groove h, having high and low dwells connected by two inclines 'b, and in said groove rides the cam-roller 9. Said roller Fig.1

Fig. 4' is a vertical section through.

$erialNo. 67,237 (lfl'omodeld j is carried by anarm. of a bell-crank lever is, pivoted at Z in the frame of-the machine, another arm m of said leverbeing connected by 1 a link a with an arm '0 of the horizontal swinging carrier pot the needle-bar q to vibrate the latter. The connection of the link a with the bell-crank lever is is made bymeans of'a flatheaded" screw rpassing through the"en'd of said link, the headset which maybe moved in alT-slot t, formed in said lever in an arc of acircle having the link n for radius,.and said head maybe clamped at any pointin said slot by a set-nut u on the projecting threaded end of said screw. 7

As the 'cam-wheel revolves the needle is shifted'from one position, in which it can p'enfetrateone eye of the button, to another position,-in whichit can penetrate the other eye,

meantime, and by reason of-the adj ustability of the endof the link n-over the T-slott a greater or less distance from the pivot Z the amount of shift may be varied, as desired, to suit different distances between the eyes of the button. The bevel-pinion c is adj ustably secured as to its rotationatposition on the di'iving-shaft b by means of the screw '0. By this means the parts may be so assembled that thelateral shifting of the needle-bar may betimed to take placewhile the needle is out of the button ey'e;

The, bevel-wheel d is of twice the diameter of the bevel-pinion 0, making one revolution for every two revolutions of the main drivings haft that is, for every two stitches made by the needleand it follows that the shifting of the needle from one eye of the button to the other takes place ;after every stitch, and areturn is made to the first eye after the next "stitch."

v The mechanisrnforshifting the button to present to the needle "the remaining two of the foureyes of the button is as follows: In

the bell-crank lever -16 arem'ade 'a series of .holes w, in any hole of which series there is secured-adjustably the end of-a link ocgthe outer end of which is pivotally secured to-a bellcrank leveri o'na' rockesli'aft z, 'j'ournaled in suitable bearings in the arm a of the machine. Said bell-crank lever carries on an arm 1 a spring-actuated pawl 2, the nose of on the periphery of a wheel 4. Said wheel is secured upon a shaft 5, which is mounted in asuitable bearing 6, formed in the frame of the machine.

The reciprocation of the pawl 2, derived from the rotation of the main driving-shaft a through the bell-crank lever in, imparts intermittent rotation to the wheel l.

The wheel 4- is prevented from going forward by its own momentum after the pawl has ceased to operate by the following mechanism: In the arm of the machine is cast or otherwise fixedly secured a disk 7, having a friction -surface 8. Between said frictionsurface 8 and the rear surface of the wheelet is interposed a friction-washer 9, of fiber, leather, or anyother suitable material. Upon the rear reduced end of the shaft 5 are secured two nuts 10 11, by means of which the wheel 4 can be drawn up against the friction material 9 with a greater or less degree of tightness, as may be desired, providing more or less friction.

Through the rear end of the shaft 5 on the rear side of the machine is diametrally passed a pin 12, the ends of said pin projecting on each side of said shaft. Said pin engages the opposite ends of a groove 13, cut in the front face of a cam wheel 1%, loosely mounted on said shaft 5. This provides a very firm and strongattachment of the camwheel to the shaft and avoids lost motion, while it permits of ready removal of the wheel from the shaft when desired.

The cam-wheel 14- has two peripheral camsurfaces formed thereon,the front cam 15 serv ing to transmit the power to shift the clamp, and the rear cam 16, which is of greater diameter, serving to control the stopping mechanism.

On the front cam 15 are a high dwell 17 and a low dwell 18, connected by ascending and descending inclines 19 and 20, and on said cam rides a roller 21 on an arm 22 of a lever 23, pivoted on the arm a, of the machine. Said lever 23 is resiliently resisted by means of a spring 24 actuating a short rod 25, sliding in a guide 26 on the rear of the arm a of the machine and connected to the arm 22.

The lower end of the lever 23 has secured thereon a pin 27, on which is passed the eye of a link 28, jointed at 29, the other end of; said link having an eye 30 pressed over a threaded stud 31 on an arm 32, adjustably carried by an eccentric 33, pivoted at 34; in the clamp-box holder 35, said eye 30 being secured upon said stud by means of a nut 30. The arm 32 lies in a groove 37, formed in the eccentric 33, and said arm has a slot 38 formed therein, by means of which said arm can be secured at any desired positionin said groove by means of a screw 39, the head of which is screwed down upon said slot.

In the clamp-box holder are adjustably secured in grooves 40 undercut gibs 41, which form guides for the clamp-box carrier. Said gibs are adjustable in said holder by means of four screws on each side, of which one pair of screws 42 are screwed into the gibs to draw them outwardly, while the other pair 43 are screwed into the holder and press against the sides of the gibs and move them inwardly. Said gibs are undercut or grooved, and in said grooves slides the carrier ia for the clamp-box. Said carrier has formed in its rear end an oblong frame 45, in which the cocentric 33 operates to slide said carrier backward and forward. Upon said carrier is pivotally mounted, as shown at 46, the box 47, carrying the shanks 43 49 of the clamp-jaws. Said box is formed with two grooves or slides 50, extending side by side parallel with each other, in which said shanks 48 4.9 slide. In order to operate said shanks, there is provided a lever 51, pivoted on said box between said grooves. Said lever 51 engages on its opposite sides with arms 52, secured to said shanks. Springs 53 are secured to the shanks at one end and at the other end to the box beneath said shanks. Thus by moving the lever 51 against the action of said springs the shanks, and therefore also the jaws 54;, are reciprocated in opposite directions, and on releasing the lever the springs retract the jaws into their original position and cause the same to firmly grasp the button.

In order to adjust the position of the clamp for wear of the machine or any other reason or to accommodate imperfect-lvmade buttons, the position of the box 1-7 upon the carrier LL is adjustable by means of set-nuts 56 around the pivot-bolt, having milled heads or other suitable means for turning said nuts.

The construction of the clamp mechanism forms no part of my presentinvention and is not herein claimed, being claimed in a separate application filed herewith.

Then it is desired to stitch buttons with only two eyes, this is accomplished by disengaging the lower arm of the lever 23 from the arm 32 in the eccentric, which is done by unfastening the joint 29 of the link 28, said joint being normally connected by means of a screw 58, and after breaking this connection the eccentric is moved into a central position and is held in such position by means of a locking-fork 59, which passes on each side of the arm 32.

The mechanism for automatically stopping the machine when a predetermined number of stitches have been made will now be described. The cam 16 has an ascending incline G0, whichin the revolution of the cam-wheel 1 engages a roller 61, carried by a slide (32, abutting against the lever 63, pivoted at the lower end of the arm of the machine, said slide 62 being guided in a suitable slideway 64, cast or otherwise formed upon the arm of the machine. Said slide thus moves said lever rearwardly. The lever has a forked end which passes around a shell 65, keyed on the end of the main driving-shaft and engages the front face of a clutch 06, said clutch sliding on said shell. and keyed thereon and being norclutch to move forward under the-action of the spring 68, and a lug 71 on said clutch then engages the under side of an inclined lug 72, formed on the lower face of the lever 73, pivoted on the frame of the machine and swinging outwardly from the main shaft, thereby raising said lever against the action of a spring 74 and applying friction to said clutch to retard the same until said lug 71 has passed the lug 72, when said lever 73 drops under the action of said spring, and at the same time the lug 71 abuts againsta fixed stop 75, thereby positively arresting said clutch and the main driving-shaft. The clutch is prevented from rebounding on its stoppage by reason of said lever.

To start the machine,'the operator presses any suitable foot-lever, (not shown,) thereby actuating a lever 76, from another arm 77 of which is suspended a weight 78 under the bed of the machine. Said lever 76 carries a pawl 79, pivoted on said lever, the rear end of which pawl 79 is connected bymeans of a spring 80 to said lever, thereby normally throwing the front end upward. The upward movement of said front end is limited by the abutment of the rear end of the pawl against the boss of the lever 7 6, by which it is pivoted upon the arm of the machine. Upon pressing the foot-lever the front end of the pawl 79 engages a stud 81,projecting rearwardly from the cam-wheel 14, moving the latter downward, and thereby forcing the roller 61 up the ascendingincline 60 from the low dwell to the high dwell of the cam 16 and starting the machine. This starting and stopping mechanism forms no part of my present invention and is not claimed herein, being claimed in a separate application filed herewith.

The cams 15 16 are so arranged relatively to each other that not only will the roller 61 be shifted on to the high dwell to bring the driving-pulley 67 into engagement with the clutch 66, but likewise the roller 21 will be moved on to the high dwell 17 of the clampshifting cam 16 at the commencement of the operation of stitching the button.

The machine having been started, the needle will make one stitch through one'eye of the button and will then, by means of the bevelpinion c, bevel-wheel d, cam-wheel e, roller j, lever it, link 91, and carrier 19, be shifted transversely of the arm to make one stitch through another eye of the button. This movement will be repeated until a predetermined number of stitches have been made, when the cam 15 will have rotated through such an are that the roller 21 drops to the low dwell of said cam, thereby vibrating the lever 23 and shifting. the clamp-carrier and the clampingjaws, thereby shifting the button to present anotherpair of eyes thereof to theneedle. When the required number of stitches have been made through said second'pair of eyes, the roller 61 drops to the low dwell of the cam 16, thereby permitting the spring 68 to disengage the clutch 66 from the drivingpulley and to move said clutch toward the lever 73 and retard and main shaft a. v

I claim-v 1. In a button-sewing machine, the combination of the main driving-shaft, the needlebar carrier, a rock-shaft operatively connected therewith to shift the same horizontally and driven from the main driving-shaft, a button-clamp mechanism, a cam-wheel driven in a uniform direction from said shaft step by step synchronously with the rocking there of, said cam-wheel having two cams, a lever for shifting said button-clamp mechanism vibrated by one of said cams, stopping and starting mechanism, and a lever for controlling the latter vibrated by the other cam, substantially as described.

2. In a button-sewing machine, the combination of a shaft extending through the arm of the machine from front to rear, a ratchetwheel mounted on the front end of said shaft,

and suitably driven from the main drivingshaft, a fixed disk behind'the rear face of eventnally arrest the ward said disk, a cam-wheel on'the rear end of the shaft having a radial groove in its front face, a pin through said shaft arranged to enter said groove to key the cam-wheel to the shaft, and clamp mechanism shifted by said cam-wheel, substantially as described.

3. In a button-sewing machine, the combination of adriving-pulley, a clutch sliding in the main driving-shaft, a lever for shifting said clutch, a slide having an arm engaging said lever, a cam-roller carried by said slide, a cam-wheel driven synchronously with the rotation of the main driving-shaft, a spring interposed between the driving-pulley and clutch and holding said roller to its cam, a stud projecting from the cam-wheel, and a pawl-carryin g lever for engaging said stud to rotate said cam-wheel to shift the roller from the low to the highdwell, substantially as de-' IIO hand in the presence of two subscribing Wit- DBSSGS- ACHILLES GIACOMINI;

Witnesses:

FRANCIS M. WRIGHT, W. PEYToN SMITH.

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