US79516A - swett - Google Patents

Description

2 Sheets--Sheet 1.

J. H. SWET'T. MACHINE FQR MAKING-RIVETS.

No. 79,516. PatentedJune so, 1868.

J. H. SWBTT. 2 Sheets-Sheena MACHINE FOR MAKING RIVB'TS.

Patented June 30, 1868.

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JAMES H. SWETT, OF BIRMINGHAM, PENNSYLVANIA.

Letters Patent No. 79,516, dated June 30, 1 868.

Iirrnovnn mourns roe MAKING Rivers.

TO ALL WHOM IT MAY CONCERN: e v Beit known that I, JAMES H. Swan, of Birmingham, county of Allegheny, in the-State of Pennsylvania, have invented a new and useful Improvement in Machines for Making Boiler or other Rivets; and I do hereby declare the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which like parts arerepresented by like letters in the several figures. I

The nature of my invention consists in so constructing a machine for making boiler-rivets as to produce rivets of different lengths, with very'nicely-shaped and rounded or other heads, at thesame time avoiding the danger of' breaking any part of the machinery, which'is usually caused by-imperfect modes of setting oil the rod which furnishes blanks for the rivets. i

To enable others skilled in theart to make use of myinvention, I will proceed to describe its construction and operation.

- In the accompanying drawings- Figure 1 is a top view of my machine, the frame of which is represented by A.

Figure 2 is an elevation of the same.

Figure 3 is a vertical section online a b of fig. 1.

Figure 4 is. an elevation or detached view-of the die, whilst Figure 5 is an axial section of the same.

Figures '6, 7, and 8 show sections of the header, the die,'as also the plunger. 7

In the drawings, A shows the frame of my machine; -B represents the main shaft, driven by' a pulley, O, or by other equivalent machinery. Attached tothis shaft B is a cam, D, which moves the header E. I At the other endof shaft B are two cams, F and G, which move the frame H, to which is connected the red I, adjustable by means of nut a, to transfer the motion to. lever J,'whi'ch is secured or fastened to rock-shaft K. To this rock-shaft are fastened two levers, L L, with cylindrical heads, 6, which fit-into two recesses in carriageM, as seen in figs. 1, 2, and In this carriage are-two plunger-s, c and (1, adjustable by screw-threads, as seen in figs. 3, 6, 7, and

N is a circular wheel-containing a number of dies, e, placed in said wheel at equal distances, concentric to the axis, and properly secured to said wheel.

Die-wheel N is fastened to a shaft, 0, having on its rear end aratchet-wheel; P. This ratchet-wheel is operated by a pawhf, in connection with a spring, 9, enclosed in a box, It, as seen in fig. 3, detached. This box is suspended and operated from arm Q,-by a rod, e. Attached to and suspended from arm Q is a cam, operated by another cam, k, attached to main shaft 13; I

Arm Q is attached -by a rock-shaft, R, supported bystandards l l. To the roek-shaft R is attached '2. short lever or arm, S, whichoperates a cutting-plunger, T, working in-a small box, m.

The heading-plunger E is guided in its straight motion by means of straps n and lugs 0, connected with supporting-plate U. The upper rear end of plunger E, which is pressed forward by-eam D, "is bevelled or curved, as seen in the drawings, plate'Q, figs. 3, Land 8.

In this position, fig. 7, plate 2, the plunger c drives the'blank through the dice, against the front dished end of the header E,- thereby upsetting it partially. After this, the header E is forced forward by cam D, thus completing the head of rivet, sothat the-rivet will be formed with proper length of sh'ank, as seen in fig. 8.

After this operation, the plunger E is brought back to its normal position, by means of a spiral or other 5, ring,p, encircling an arm, q, as seen in fig. 3. This arm is fastened to header E, placed in a slot in supportingate U, (see fig. L) This retrnction take's plnceas soon as the header is relieved from the action ofthe cam D.

The die-wheel N is rotated by means of ratchet-wheel P, attached to shaft 0, and operated as previously desribed.

The table or carriage M, has a second adjustable screw-plunger, d, which performs this operation or func-' tion, viz, that after the rivet is made, andtbe die-wheel presses on plunger 11, pushes the forward-rivet out of the die, discharging the same. The two cams, F and G, on the shaft B, govern the movements 6fthe carriage M through the frame H, and the two bearings, r :1, attached to it, motion-being transmitted to the carriage, as

previously described, through adjustable rod 1.

The operation is simply as follows:

A-heated rod, from furnace, is inserted, in hole t, fig. 3, and pushed back to the rear end of box m, The plunger or cutter T comes down and shears it oifto the proper length, after which it drops down to the bottom ofthe said box, and the plunger T follows the blank thus cut oil to the bottom of the box, and holds it firmly, whilst the rode pushes it from under said plungerthrough the die in the die-irheel, that is opposite to it. The object in thus holding the blank under the plungerjis,'that it may go only in a direct line, and the upsetting be done centrally of the blank. If not thus controlled whilst being fed through the die and against the header, the least obliquity of the blank will cause the head-to be upset to one side, and thus make an imperfect rivet. The bottom of the plunger T, and the bottom of the 'box, are made to forma seat for giving the blank its accurate position for being thus pushed through in a direct line, when the plunger 0, in itsbackward motion, pushes it into the die 0.

This die, it will be seen in figs. 4 and 5, is enlarged at the front end of its chamber, or reamed cut, (seeat small u.) The purpose of this is to prevent accident, or a more certain passage of the'sheared blank into the chamber of the die.

The dies may be changed, as also diewheel plungers c c, to suit-difierent-sized and shaped rivets. The dies are secured by set-screws, or in any other suitable mechanical manner.

The stop 12, fig. 1, limits the backward movement of the header T, and it can be made adjustable, to suit theheading of the rivet. I

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-- 1. The combination of the header, die, and rod 0, all arranged and operating substantially as described.

2. In combination with the header, die,and rod 0, the holder T, for keeping the blank straight whilst being pushed up to the header, substantially as described. v

' JAMES HLSWETT.

Witnesses:

. S.'S. Fmsns'rocx,

LOUIS Ll SOLOMON.

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