USRE2444E - patten - Google Patents

Description

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IMPROVED MACHINE FOR MAKING GLINGH RING S.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, Gr, PATTEN, of Bath, in the county of Lincoln, and Stateof Maine, have invented a new and useful improvement in the Machine for Forming and Punching Clinch Rings, or other articles of like character, from-a plate of metal; and I do hereby declare that the following is a full, clear, and exa t description of the same, reference beinghad to the accompanying drawings, fornfing part of this specification,

in which Figure 1 is an external side elevation of my improved machine as ready to commence operating. Figure 2 is a vertical longitudinal section of the same, it being shown in red as it appears when in operation, and in black as it appears after the ring has been formed, punched, and discharged.

Figure 3 is a vertical transverse section, such section being taken through the dies. Similar letters of reference in each of the-several figures indicate corresponding parts.

This invention relates to a. new and usefulimprovement 'in machinery for forming and punching clinch I rings, which are generally used as washers in ship building.

To enable others skilled in the art to make and use my invention, Iwill proceed to describe its construction and operation. I I I A represents the cast-iron frame of the machine. It may be constructed after the plan shown in the drawing, or any other more suitable. B B are two levers, connected together at their extreme. back ends by the strips 0 C. The pins a a, which secure the links'c to the levers, pass loosely through the levers in order thatthe rear parts of said levers may adjust themselves to the movement of the forward portions of the levers.

The upper lever'B has a fulcrum at b in back standards of the frame A, as shown in figs. 1, 2, and 3, and the lower lever B has a fulcrum at C inthe front standards ofthe frame A. C is a cam, arranged on the drivingshaft D, which is hung in the top of the front standards of the frame A. This cam serves to give action to the lovers, it being arranged so as to bear upon the front arm of the top lever B". vBy thus arranging thelevers great=powcr can'be secured at the point desired. E is thetop die, and F is the lower-die, which are made of such shape that they, in combination, will produce a clinch ring of the form desired. These dies are arranged so that they may be removed, and others of smaller or larger size substituted for them. G is the sliding or spring collar or plate retainer, which not only operates to retain the plate or hold it in place on the die preparatory team]. while the punch may be passing through the plate, but allows of the punch passing into the lower die, as shown in red lines in fig.'2,. and black lines in fig. 3, and then, as thepunch is withdrawn from the lower die, withthe ring hanging to it, serves to disconnectsaid ringfrom the upper die, and cause it to fall upon the elastic seat of the lower die. H is. the elastic seat of the lower die. Such seat consists of a plate supported on a spring. It is arranged within the die, and it serves for preventing the ring after being finished from faliing into the chamber of the lower die, vThesaid seat moves up even with the top of the lower die when the punch is withdrawn, and thereby elevates the clinch ring, or article formed by the dies, up to a level with the top of the lower die, in order that such ring or article may be pushed from the dies by the bar or plate when next advanced between them. The seat performs the above-mentioned function, and as the ring falls from the punch or upper die, catches it and prevents it falling into the female die, and holds it thus until the .bar is fed in to form another ring, and the upper die descends upon the bar or plate, when it yields and allows the metal to be forced into the chamber of the lower die. It should be remembered that the end of the bar discharges the finished ring. If this ring is not thus prevented from falling into the lower die there is danger of the discharge of the ring not being readily eil'ected, and consequently the machine is liable to bebrokenl This machine may be set in action by gearing similar to that represented if found advisable,

which consists of a driving-pulley, J, spur-wheel, K, andpinion', L.

The operation is as follows: The machine is set in motion and the bar fed inthe required distance, as

shown in fig. 1. The cam forces the end of the lever 13 down to'the position shown in red in fig. 2, and thereby I causes the back end of the lever Bf to rise, and consequently its front end, to which the die is attached, to

descend, as shown in red lines, and to exert sufficient pressure to cause the dies to punch and form the die ring.

The com continues to revolve, and allows the levers to rise. As this takes place the finished ring is drawn out of the lower die by the upper die, and is disconnected from said die by thev sliding spring-collar G, and falls upon the elastic seat of the lower die, which prevents it passing into thechamber of said die. -'.lhe ring Fthu'sfinished is discharged as the bar is fed in to form another ring, said discharge being efiected by the bar itself. By the specified arrangement and operation of the spring-clearer G,-exteuding around the punch or top die, in combination with the elastic lower die, it will be observed that the clinch ring as formed-is restrained from all possibility of falling or resting only partially in the lower die, or of tipping upwardson thc one side,

partially out of the lower die, as liableto be caused by shake, slight deviation from the vertical positionin the lift of the punch, or bythe clinch ring slipping freer and'sooncr 0d the one side of the punch than the other, and by such displacement of the ring should the punch again descend, before the ring is cleared from the machine would'ibe liablcto cause breakage of some of the parts of the machine; This liability by my arrangement is obviated, as the clearer G, which has a broad bearing surface over'the entire top of the clinch ring, always exerts a tendency, by the spring pressing itdownwards, both during the up and down stroke of the punch, to detach or clear oif'the clinch ringiirom the punch, and to hold or keep the ring steady inits seat in the lower die, but still not to hold it so hard or grip it that any difiiculty will be felt in removing it by the feed of the bar forwards to make another ring, as specified; the grip of: the clinch ring, when made between the top and bottom dies, beingtthatffif two elastic cushions, as if it were. In feeding in the bar it will be observed vthat the clearer G by its position will act as an elastic guide to the introduction of the bar, and will readily give orv yield to any inequality inthe thickness of the bar, so as to insure an easyfeed, but at the same time will press the bar down flat on its hearing or bed, and restrain the'forward end from turning or jumping, as; is apt to be the ease in feeding by hand, so that the punch cannot fail to strike the bar flat or fair, as it is termed, .which is better for the punch, and makes a cleaner ring. The clearer also, by bearing down on the bar during the punching of the ring, steadies it and facilitates the operation. And thus the springing lower die and clearer, acting in concert in the manner described, forming a soi'thut suflicicnt double grip and elastic guide to the bar, forms an arrangement having many practicable important advantages in the'manufacture of "described, I I

clinch rings. a v V I am aware that a lower die havinga spring seat for discharging the manufactured article has before been used; also that a spring-clearer dilferently arranged or operating in combination has been employed in various eyelet machines for removing the eyelets from the punch or-upper dies as it ascends; such, therefore, I do vnot claim. But lwhat I do claimas new and useful, and desire. to secure by Letters Patent, is I "The combination of the retainer andclearer or partG, and its springs, or the equivalent thereof, and the elastic seat H, with the dies E and F; the upper die being provided with mechanism for operating it, 'as described.

I also claimthe combination, as well as the arrangement, of the retainer or part G, and its springs or their equivalent, with a punchand die or dies, E F, the said part G being to operate therewith, substantially as V c. M. PAT-TEN. Witnesses: I

G, W. Lsnnnnnn, J. P. Hrrcncocx.

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