US1498972A - Eyelet machine - Google Patents

Description

June 24, 1924. 1,4%?@152 J. FESSER EYELET MACHINE Filed SeDt. 28, 1922 v SISheevts-Shee 2 I l INVENTOR JUIL/a@ im? A TTORNE Patented . lune 24, 1924..

PArENr oFF-ICE.

JULIUS LESSER, OF NEW ROCHELLE, NEW YORK.

EYELET MACHINE.

applicationy filed September 28, 1922. Serial No. 591,026.

T all 'whom t may concern f Be it known that I, JULiUs Lessen, a citizen of the United States of America, residing at New Rochelle, TWestchester County, State of New York, have invented certain new and useful Improvements in Eyelet Machines, of which the following is a specification.

This invention relates to machines for use in forming eyelets on the underside of buttons and in particular to machine which will be power driven and be capable of performing work upon a plurality of buttons simultaneously. f

An object of the invention is to provide a machine to which the stock may be continuously fed without attention from an operator, in which all the eyelet forming operations are carried on automatically, and in which the output may be regulated depending upon the demand. A further object is to provide a machine of the character described which will be com act, have comparatively few parts and wil require a miniA mum of power for its operationa Further objects and advantageous details of construction will appear as the specification progresses.

In the drawings, which illustrate one enibodiment of my invention`` Fig. 1 is a front view of a machine constructed in accordance with my idea, Vthe work performing tools being omitted for the purpose of clearly illustrating other parts of the machine;

Fig. 2 is a side elevation of my machine as shown in Fig. 1, the relative location of the driving mechanism being brought out principally;

Fig. 3 is a top plan view of my machine showing the placing of the upper framework and cam screws; Y

Fig. 4 is an enlarged partial section taken on the line 4 4 of Fig. 1 and has included therein two of the tools not shown in Fig. 1.`

In this view, the top plate of the frame is also broken away to expose the operating slide;

Fig. 5 is an enlarged elevational View, partly in section, of that part of the machine illustrated in Fig. 4;

Fig. 6 is a partiall section taken on kline 6 6 of Fig. 3 showing the method used for holding a button in position to be operated upon for the lirst time, and the tool, in this instance a cutter which shears-olf the excess lengths of button Shanks; p .n Y,

7 is a combined top plan and sectional view, the latter being in elevation, of the crimping tool, this tool being-the one omitted from Fig. 4 for lack of s ace;

Fig. 8 is a view similar to Fig. 1 showing the eye-forming or bending tool in position to start its work on the button shank; and Y Fig. 9 is a view of the button as it appears after being successively operated upon by the cutting, crimping and'bending tools.

Fig. 10 is a vertical section showing connection of arm 28 and cap 26 in detaill Fig. 11`is a sectional face view ofthe inclined button feeder taken on line 11-11 of Fig. 4.

Referring to the drawings in detail and in particular to Figs. 1, 2 and 3, 10 indicates the frame of the machine upon the top plate 11 of which is cast an upper frame 12 having the vertical stanchions 13 projecting therefrom. Intermediate the bottom 14 of the frame and the top plate thereof is a plate 15 on the center of which is. secured an oil cup 16 in which revolves the end of a driven shaft 1'?. This shaft extends through the top plate 11 and carries at its upper end a work holder turret 18 and thereabove a ,plunger carrying turret 19. The turret 18 has a collar 20 with which it is secured to the shaft 17 through the medium of a set screw 21 passing through said collar. The turret 19 may be an integral part of the turret 18 or as shown, it may be separate for convenience of assembling and may be secured also to the shaft 17 by any suitable device such as a set-screw, or pin. These turrets are disposed centrally within the upper frame 12.

Immediately beneath the top plate 11 of the frame and secured to the driven shaft 17 is a pair of ratchets, an upper one 22 and a lower one 23. In the bottom 14 of the frame and in one corner thereof is located a motor 24 which through suitable worm connections operates the driven shaft 25 which extends upwardly through the intermediate plate 15 and fixedly carries at its extreme upper end an eccentric cap 26, in which there is provided a diametrically disposed T-slot 27. Adjustably heldin the T-slot, in the usual manner, is one end ofa link or pitman 28 which extends `obliquely across theframe and connects at its other end with the slide 29. This slide is held in a support which is `bolted to the intermediate frame plate 15. f The slide acts asa weight to impart inertia to the operating levers associated therewith and which will later be described. The support is recessed to properly hold the slide, which, as illustrated, only shows one form which may be adopted.

On both eXtreme upper endsof the slide there are secured posts 3l and 32 having loosely pivoted to their upper ends bell cranks 33 and 34 which are suitably held adjacent the under side ofthe top plate 11 and in position to each carry a pawl 35 and 36 respectively, the former of which operates on the periphery of the upper ratchet wheel -22 before referred to and the latter on the periphery of the lower ratchet wheel 23. It

can be seen then, that when the slide is reciprocating, the ratchet wheels will be kept alternately in motionV and, being fastened to the shaft 17, will keep the saine in contin` nous slow motion. The teeth of the ratchet may be so spaced that for an instant, that is while the slide is .at either limit of its travel, there will be no movement of the shaft 17. This condition will occur six times in a single revolution of the shaft. The reason for this is that there are sii; work hold- .ers carried on the periphery of the work holder plate and at three of these work holders, there is an operation being performed simultaneously.

The work holders 37', referring now particularly to Figs. 4, 5 and 5 comprise plates having a longitudinal slot therein which ertends inwardly to substantially the center` thereof from one end; the outer end when Ythe `plates are in position in the turret 18.

Six bevelled slots in the turret 1S and sii: set screws 38 projecting out of the plunger turret 19 are the means of holding the work holders in position.y The dies are fed with buttons, one `button to a work holder. through kan inclined feeder 39 which is `mounted upon the top plate 11 in proper position to feed to the work holders successively. The turret 1S and turret 19 revolve in the direction indicated by the arrow .f-i u. Fig. 4 and a button will then be taken from the feeder 39 around 'to operation No. l, which is the shank shearing and which is accomplished by a cutter 40 that is fixedly lmounted on the top plate. The tools are separated by one sin-tn the circumferential distance of the turret 18. Therefore, there is a work holder presented at each tool upon each movement of the turret 18. The cutter 40 comprises a sliding' knife 41 which vis operated in a standard 42 through the medi- Vum of a lever 43 which extends through a suitable opening in the top plate 1.1 and connects with a cam arm 43a. Each of the three "tools used is operated by a cam arm 48a in the end of eachof which is a roller 44 which rolls over the face of a cam 45 disposed between the top plate 1l and the upper ratchet wheel 22. The cam is provided with siX raised portions, one for cach work holder. It is apparent then that when the cam is revolving, the three tool operating arms 43 will act simultaneously. rlhe cutter is further provided with. an extension 46 which constitutes an anvil against which the button shank may be pressed in the "ical-ing operation. When the button shank has been cut, the ratchets move the work holders around to the nent position and the next tool to operate upon this particular button is the crimping tool 47, shown in Fig. 7. This tool comprises also a separate anvil member 48 which is adjustably fastened to the top plate 11 and whose anvil portion is in position to be disposed behind the button sha-nk. The crimper comprises a block 49 which is slightly wider than the anvil and whose face is cupped to provide it with 'top and bottom crimping edges 50. The edges 50 crimp the button shank, as shown at B in Fig. 9. The next operation and final one is the eye-forming or bending one and is carried out by the bending tool 51 shown in Fig. 8 which comprises a rocker 52 having pivotal connection with the top plate 11 by a bolt 53. A bending block 54Ais adjustably f mounted upon the end of the rocker 52 and mores upwardly. The cupping of the block 54 provides the bending of the shank into an eye, as shown in 9. The rocking movement is imparted to the bending tool 51 by a lever 55 which is pivoted on a standard 56 suitably connected to the underside of the top plate 11. The lever is operated by one of the cam arms 43a, above referred to. The action of all the cam arms is l* against suitable springs which maintain the rollers against the cam 45.

Uien the eye-forming operation has been completed, the button is discharged into a hopper 57, the hopper having an extension 58 which acts to cam the button out of the work holder slot. The die between the hopper and the feeder is always empty.

Referring now to Figs. 5 and 6, the latter in particular, wherein is illustrated a method of holding a button firmly during the working operations thereon. A circular iiat spring 59 extends entirely around the upper outer edge of the turret 18 but unattached thereto and in position to orerlie the slots in the work holders. Fingers 60 are secured on both sides of the feed chute 49 and eX- tend under the spring 59 so that it will be raised off the die to which a button is to be fed. As soon, however, as the holder moves away from the chute,V the spring presses upon the button and holds it in position due to the comparatively slight pressure of the pistons 61 on the spring 59. When the button comes to the point where it is to be acted upon by a tool, there must be some provision for holding the button very securely and this is accomplished through the medium of six plungers which are housed in the turret 19 and located one over each plate 87. These plungers comprise in their entirety a 'lower piston 6l which protrudes out of the bottom of the turret 19 and presses on the spring 59, said piston being provided with an enla head portion 62 which operates against the action oi a coil spring 63 contained in a chamber 64 which has been forced into a suitable bore in the turret 19. The spring 63 acts against an upper piston 65 which is limited in its upward movement by reason of the fact that it has suitable pin and slot connection with the walls of the chamber 64. This piston, however, projects above the upper suri'ace of the turret 19 and engages a semi-circular flat spring 66 whose ends are connected with the opposite ends ot' the top frame and in position to keep the spring exerting pressure on the top of said cylinder. ln the stanchions 13, one of which is located immediately over the point where each of the three working operations takes place, there are screws 6'? which extend down to touch the spring 66. The distance these screws extend down depend upon the pressure desired upon the lower piston 61, and can therefore be regulated as desired. Fig. 6 shows how the pressure on the button will be automatically increased. lWhen the buttons are at the point to be operated upon, the pistons 65 will be depressed by the screws 67, and they in turn will compress the coil springs 63 to force the plungers or pistons 61 down upon the spring 59 which overlies the buttons.

It is apparent then that I have designed a machine wherein all of the operations are automatic, wherein various adjustments may be made to regulate the speed of production by government of the eccentric throw and the pressure applied to the work holding elements and also adjustment of the work performing tools in the interests of perfect work and rapid production.

What I desire to secure by Letters Pat ent is 1. ln an eyelet forming machine, a work holder adapted to carry a plurality or articles upon which an eyelet is to be formed, tools for forming the eyelet on said articles, and a resilient band member adapted to retain said articles in position to be operated upon by said tools.

2. ln an eyelet forming machine, a plurality of button holders, means for cutting, means for crimping and means for bending, said means acting simultaneously upon a plurality of button Shanks, but successively on each shank to form an eyelet, a resilient member overlying each of the button holders, and means adapted to act upon said resilient member to retain the buttons securely in position which are being operated upon by said tools.

3. ln an eyelet forming machine, a frame, a Work carrier turret revolvably mounted upon said frame, a plunger turret associated `witli said carrier turret, work holders carried by said carrier turret, means in said plunger turret Ytor engaging an article adapted to be held in said work holders, and means on said Jframe for causing pressure of some of said article engaging means against the article.

4l. lin an eyelet forming machine, a plurality oi' work holders, plurality of tools so located that the work holders are brought successively in position in front thereof, means for operating the tools simultaneously to perform work upon the elements held in said work holders, and means comprising a resilient spring strip adapted to span a plurality of work holders for engaging said elements during the performance of the work thereon.

5. ln an eyelet forming machine, a frame, a work holding member, a plurality of tools adjacent said member, means for operating said member and said tools simultaneously, a plurality oi' plungers associated with said work holding member,` means carried by said frame whereby the plungers will be caused to exert pressure upon the work when said work is brought into position to be operated upon by the tools, and means comprising a resilient spring strip disposed beneath and adapted to span all of said work engaging plungers.

6. In an eyelet forming machine, a work holding member comprising in part a plurality of work holders, means for feeding the work holders successively with a single button, means for performing a plurality of operations on said buttons simultaneously, means for discharging said buttons singly from said work holding members, a spring member adapted to engage said buttons simultaneously, and means whereby said spring` will be spaced from said buttons at the p oint of feed and discharge of said work holding member.

JULIUS LESSER.

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