In sheet-metal can manufacture, where the heads are applied to the outside of the body, the heads are struck from circular sheets of metal by means of dies, one of which is a plunger of the shape and size of the inner diameter of the can-head flange, and the other of which is a matrix or raised die of the depth of the flange and of the diameter of the exterior of the flange. The circular disk of sheet metal being laid on this matrix, and the plunger depressed to force the sheet into it, the result is that the flange is upturned around the margin of the sheet-metal disk, and is of definite dimensions, both as to its thickness and as to its exterior and interior diameter. Can heads made by the same dies are, therefore, always of the same size. Can bodies are, however, not always of the same size, whether they be made by hand or by machinery. They are formed over a horn or mandrel, which at best can only give them uniform interior diameter, even if it were possible to press the blank sheets around the mandrel with uniform force, or to make the joint forming the side seam with uniform accuracy. Besides this, (he can bodies thus made are liable to vary in both internal and external diameter. They are also subject to variation in external diameter, even if of uniform size inside, because of the varying thickness of the sheet metal of which they are made; such variation sometimes occurring in the same sheet and in different parts of the form of the can body. As it is necessary that the can heads, which are of uniform diameter, shall in all cases closely fit against the exterior surface of the end of the can body, it is therefore requisite that an external compressing means shall be employed to compress or reduce can bodies which are slightly too large for the proper size to enter the can head. This externally applied compressive force must be in action at the time the can head is applied to the can body, because the relaxation of such force would allow the can body to expand to its original size, and to assume any irregularity of shape which it previously possessed, and thus unfit it to receive the head. Therefore, the compressive force applied to the can body must continue to hold the can to its form and size while the head is being put thereon. As the head is to closely fit the exterior of the can body, and the two are to be applied simultaneously to each other at all points in their circumference, it is essential that both the head and the body be held in exact alignment with each other while the two parts are being brought together. It is therefore essential that whatever device be constructed to carry into effect this purpose must be so constructed as — First, to bring the ends of the can body to the necessary size and diameter to receive the can head; secondly, the head and body must be accurately held in proper alignment, so that, in the act of bringing them together, the flange of the head may *837 closely fit tbe outside of the body; thirdly, there must be a, direct and uniform movement of either the can head or can body simultaneously ai all points in the circumference upon the can body, and to carry forward the operation of heading to its completion; and, fourthly, the means for sizing the can and for shaping it to a perfect circle and size must be external to the can, and so adapted as to open to release the can after the heads shall have been applied.

When one claims to be the owner of such a patented device, which has been infringed by another, the first important thing to do is to see what is the invention covered by the patent that is claimed to have been infringed. Accordingly, we turn to the record to see for what the complainants’ patent was awarded. It is there seen that the inventor, Norton, asked for more ilia n the patent office gra nted. The contents of the file wrapper, which was not in evidence in the case of Norton v. Jensen, 1 C. C. A. 452 , 49 Fed. 859 , show that Norton, in his application for the patent, claimed to have invented, not an automatic or any other kind of machine for putting ends on fruit or other cans, but'to have invented “certain new and useful improvements in machines for putting on” such ends. And, in his original application, he thus specified his invention:

All ÍJiuse, and other features of the invention, Norton proceeded to describe in his application, with (he aid of the accompanying drawings, and his claims were therein thus stated:

All of these claims were rejected by the patent office, — claims 1, 2, and 5 because of patents theretofore issued, namely, patent No. 285,700, to Pierce, on December 21, 1880; patent No. 233,070, to Dillon and Cleary, on October 12,1880; patent No. 225,085, to Brooks, on March 23, 3880; and an English patent, numbered 4,237, issued in 3873. The examiner of the patent office thus stated the objections to claims 3, 4, and 0, made by Norton:

To meet and avoid these references and objections made by the patent office, Norton amended his application by inserting, after the word “efficiency,” in his original specification, the following:

And lie further amended his original application by striking out all of the claims therein contained, and substituting in lieu of them the following:

In a note to the amendments thus made by Norton to his original application, he said:

Claim 4 of the amended claims was rejected by the patent office; and upon objection there made that the statement made in the applicant’s specification that his invention consists in “a clamping mold, the interior dimensions and form whereof correspond with the *840 exterior dimensions and form of the can body, and the end whereof is chamfered away,” is not in accord with the three claims allowed, the applicant further amended his application by striking from his specifications the clause last quoted, and, as thus altered, the application was allowed, and the patent, numbered 207,014, was issued to Norton.

In defense of the suit, the defendant, among other things, set up in his answer, and also introduced in evidence, the patents to which Norton was referred by the patent office, when rejecting his claims as originally made, and also letters patent No. 152,757, issued July 7, 1874, to George A. Marsh, for “improvement in devices for heading cans,” and letters patent No. 238, 351, issued March 1, 1881, to-William J. Clark, for a “can-heading machine.”

As already said, none of the proceedings in the patent office disclosed by the contents of the file wrapper were in evidence in the case of Norton v. Jensen, 1 C. C. A. 452 , 49 Fed. 859 , nor were any of the prior patents here set up as anticipations of the complainants’ patent there shown, except that of Pierce, in respect to which the court said the testimony showed that Norton’s invention was prior in point of time, for which reason the court concluded that the Pierce patent had “no particular bearing upon any of the inventions or machines in controversy.” 1 C. C. A. 452 , 49 Fed. 862 . As there presented, Norton’s invention undoubtedly appeared to be of a primary character, standing at the head of the art, and its owners were, therefore, properly held to be entitled to a broad and liberal construction of its claims. Whether the same broad and liberal construction should be applied in the present case remains to be considered.

That the complainants’ patent is, by the record in this case, placed in a different position from that occupied by it in the case of Norton v. Jensen, is very clear. Although the application for the Clark patent was filed January 7, 1881, and that patent issued March 1, 1881, and although the application for the Pierce patent Avas filed August 13, 1880, and that patent issued December 21, 1880, whereas Norton did not file his application for his patent until June 24, 1882, yet he testified that he made his invention and made a small experimental machine to demonstrate its practicability as early as July 15, 1880, — nearly one month before the application for the Pierce patent was filed. Nevertheless, the fact is beyond dispute, for it is a part of the record evidence, that all of the claims asked for in Norton’s original application were rejected by the patent office, based largely upon the suggestion that they were covered by the patent theretofore issued to Pierce, whereupon Norton, so far from then claiming that his invention was prior in point of time to Pierce’s, amended his specifications by, stating that he knew that machines had theretofore been constructed for applying heads to the same class of cans, where the flange of the head is inserted inside the can body, or where the head is crimped on the can body, and, for the purpose of showing that such machines Avere unlike his inA’-ention, he proceeded to say, in-his amendment to his specifications:

Following ibis, be amended bis application 'by substituting for his original six claims, which the patent office rejected, four other claims, the first three of which were allowed, and are embodied in the patent. In addition to the Pierce and Clark patents, the record shows that on June 2C, 1880, Dillon and Cleary applied for, and, on October 12,1880, were granted, a patent for "an improvement in mechanism for placing heads in cans,” and, in 1874, Marsh was granted a patent for "certain new and useful improvements in devices for heading cans.” The Dillon and Cleary patent was, like that to Pierce, for a device for pulling heads in cans, and the Marsh patent, while for a device for putting tight-fitting can heads on the outside of can bodies, was designed to be used by hand. It consists of a solid die with a cavity to receive the can head, secured rigidly to which, at one side, is a semicircular bevel-faced guide, slightly overlapping, at its middle portion, the cavity, but the two extremities of which do not overlap it. Those extremities are, however, tilted slightly upward, to enable the headed can to be tipped ont of the die. To use this device, the operator first fits a head into the die by .slipping one side under the guide. He then takes the can body in his hands and places one side under the guide into the uncovered half of the can-head flange. He then, by tilting the can body, forces it into the head, the overhanging portion of the guide serving to crowd the last portion of the circumference of the can body into the can-head flange. The headed can is then tilted out of the die. This device for putting tight-fitting heads on the outside of can bodies, as well as the device of Pierce for putting such heads in cans, was in existence at the time Norton made the amendments to the specifications descriptive of Ms invention, and at the time he made the amended claims under the objections raised in the patent office.

It is perfectly clear that the claims first made by Norton were much broader than those finally made in his application for* the patent, and that were allowed and embodied in the patent issued to him, and it is equally as clear that this narrowing of his claims was compelled by the objections raised by the examiner of the patent office. Under such circumstances, the rule is well settled that the patentee cannot, after the issuance of the patent, broaden his claims by dropping any element which he was compelled to include in order to secure the patent. In Fay v. Cordesman, 109 U. S. 408 , 3 Sup. Ct. 236, the court said:

In Sargent v. Lock Co., 114 U. S. 63 , 5 Sup. Ct. 1021, it was said:

To the same effect are the cases of Shepard v. Carrigan, 116 U. S. 503 , 6 Sup. Ct. 498; Leggett v. Avery, 101 U. S. 256 ; Vulcanite Co. v. Davis, 102 U. S. 222 -228; Mahn v. Harwood, 112 U. S. 354 -364, 5 Sup. Ct. 174, and 6 Sup. Ct. 451.

And, concerning the general rule by which claims are to be construed, the court said, in Howe Machine Co. v. National Needle Co., 134 U. S. 394 , 10 Sup. Ct. 570:

Now, comparing tbe original with the amended claims of Norton, it is not difficult to see the difference between what he sought to have allowed him, and what he was compelled to accept in order to get his patent. Take claim 1. As originally made, it read:

Here, as will be observed, nothing whatever is said about any annular space in the end of the mold, but the claim is simply for the combination of a clamping mold conforming to the exterior of the can body, and a piston for forcing the cap or end piece upon the body, with the operating devices. As here made, claim 1 was clearly anticipated, as held by the patent office, by the patent of Pierce, the device^ of which consisted, in part, of an opening and closing mold or clamp, the upper end of which is chamfered away to enable the end of the can body to be expanded after the reception of the can head, which is forced to its place in the can by means of a piston while the can body is tightly held by the mold. Claim 1, as thus originally made, was, therefore, rejected by the patent office, and the applicant substituted in lieu of it this claim, which was allowed:

Now, here was an element inserted in claim 1 by the applicant which the original claim did not contain, namely, a mold so constructed as to leave at its ends an annular space between the mold and can body for the reception of the flange of the can head, with a device for forcing the can head into the annular space, and thereby -applying' the head outside the can body. That the annular space so introduced is an important and essential element of Norton’s invention was expressly declared by himself in the note to Ms amended specifications and claims, where he said:

And, in his specifications, the applicant also expressly asserted the essential nature of the annular space of the mold, for he there says:

Thus, the inventor himself, when seeking' the patent, declared that one of the essential elements of his invention is the annular space betunen the can body and mold into which the can head is forced, thereby, as in terms declared in claim 1, applying the head to the outside of the can, in which respect, the inventor further declared, his invention differs from any of the patents to which he was referred by the patent office.

Another essential element common to all of the complainants’ claims as finally made, allowed, and embodied in their patent, is the piston, or device for forcing the can head into the annular space. Both the annular space and the piston or device for forcing the can head into that space were also made essential elements of each of the other claims as finally made, and allowed and embodied in the patent, and, as each of the claims of Che complainants’ patent is for a. combination, unless the defendant’s device contains that annular space and piston or device for forcing the can head therein, or (heir mechanical equivalents, it is clear that the charge of infringement is not made out. McCormick v. Talcott, 20 How. 402 ; Vance v. Campbell, 1 Black, 427 ; Schumacher v. Cornell, 96 U. S. 554 .

Claim 2 of the complainants’ patent, in addition to the elements in claim 1 thereof, embraces a chute or device for delivering the can bodies and a chute or device for delivering the can heads to the machine, and claim 8 is "for simultaneously applying the heads to both ends of a can, the combination of a series of movable devices,” such as is claimed in claim 1, to wit, the mold for clamping the can body and sizing its exterior diameter to conform to the interior diameter of the can heads, with an annular space at its ends for the *844 reception of tbe flange of tbe can beads, witb devices for simultaneously forcing tbe can beads into tbe annular space, and on eacb end of tbe can body. An annular space is a space existing between tbe circumferences of two concentric circles having different diameters. It exists in tbe mold of complainants’ device witb its two diameters, tbe smaller of wbicb is equal to- the diameter of tbe exterior of tbe can body and to that of the- interior of the flange of tbe can head, and the larger of wbicb is equal to tbe diameter of tbe exterior of the can-bead flange. Tbe function of tbe smaller diameter of tbe complainants’ mold is to size and round tbe can body by external pressure, and that of its larger diameter, constituting tbe annular space, is tbe reception and guiding, in line witb and upon tbe can body, of tbe flange of tbe can bead when forced therein by tbe piston, — thus tightly applying, witb precision and at tbe same time, all of tbe parts of tbe interior of tbe flange of tbe can bead to tbe outside of the can body, while tbe latter is, during all of the'time of tbe beading process, firmly held by tbe mold in an immovable position.

In tbe complainants’ device, two wheels are employed to rotate on a common stationary axis, and to carry at their peripheries molds in a circumferential series. Eacb of these molds consists of a fixed-inner semi-circular jaw and two quarter-circular jaws, tbe latter being binged to tbe former, and adapted to open and close tbe mold like tbe two halves of a double-lidded vessel, wherein tbe half lids open outwardly. Means are provided for opening and closing these hinged parts of tbe mold, consisting of crank arms or levers, a slide connected by links witb tbe lever, and a fixed cam provided witb a groove or grooves wbicb receive a pin that projects laterally from tbe slide, and causes tbe slide to move radially inwardly and outwardly as tbe wheels revolve. At one point in tbe revolution of tbe wheels, and at a point where tbe binged parts of a mold will open, a chute for can bodies is arranged to deliver a can body into tbe mold. Tbe mold for receiving tbe can body is closed in its further revolution by tbe fixed cam. To eacb mold are also applied two end chutes down wbicb can beads may descend into proper position opposite tbe ends of tbe can body inclosed in tbe mold. Two piston beads on pistons or shanks are arranged to move inwardly towards tbe mold, one from eacb side, and to simultaneously push tbe can heads into tbe annular spaces and thus upon tbe ends of tbe can body. Tbe desired movements of these pistons are obtained by springs and cams, springs being arranged to throw and bold tbe pistons in their retracted positions, and cams being employed to thrust tbe pistons inward in forcing tbe can beads into tbe annular spaces and thereby upon tbe can bodies. Tbe mold is made in two parts, to open and receive tbe can body,_ and to discharge it after it is beaded. In bis specifications, tbe inventor said:

When closed upon tbe can body, tbe mold bolds it in an immovable position, tbe can bead being carried from tbe can-bead chute by *845 means of the piston or forcing device into the annular space of the mold, and thereby applied to the outside of the can body. After the pistons have passed the cam they are retracted by the springs, and the mold is opened by tire fixed cam so as to discharge the headed can from the mold.

The defendant's device consists of a main central shaft, B, upon which is mounted a driving wheel, E, to _ which power is applied in any convenient manner. Fixed upon the central shaft is a spool, upon the ends of which are two disks, I), D, perforated by a row of 20 holes, which pass through them near their peripheries in a circular line, which is concentric with the main shaft:. Metal rods, F, Fa, pass through these holes, each rod passing- through both disks and operaving in pairs, one of which moves in one direction, while the other moves in the opposite direction, and each pair of which carry and operate two sets of jaws, — a "set of jaws” being designated by the defendant, in his specifications, as “both of the two halves that form the entire circular ring that incloses a can head and one end of the can body.” The half of this entire ring which is nearest to the rods, F, Fa, he designates as the inside jaw, L, and the other half, which pulls hack from the inside jaw when the jaws open, is called the outside jaw, X. Two screw bolts, ⅞1, M, are made with a flange, .tía, near their middle part, and with screw threads cut. both above and below the flange. These holts arc screwed down into the back, La, nearly to the flanges. Metal Mocks, O, (), are perforated so as to slide down over the upper ends of the bolts, and rest upon the' flanges, Mb. Xuts, Mb, on the upper ends of the bolts, screw down tightly upon the blocks, O, O, and fasten them rigidly in place. The blocks, 0, O, may be raised or lowered to perfectly adjust the distance between the outside jaw, N, which is carried by the blocks, O, 0, and hinge holt, h, and the inside jaw, L, by loosening the nuts, Mb, and turning the bolts, At, M, so as to screw them further into or out of the hack, La, and then again tightening- the nuts, Mb, upon the blocks, ü, O. The outside jaw, N, is made with a shank, g. This shank, g, fits in the space between the blocks, O, O, and a hinge bolt, h, passes through the blocks, O, O, and the shank, g, of the outside jaw, and hinges the outside jaw in its place, so that it may stand open or he turned and closed. A latch, i, is pivoted to the edge of the hack, La, and is fixed normally in the position shown in the drawings by a spring, j, which is fixed at one of its ends to a small stud in the latch, and at its other end is fixed to a stud, k, that projects below the edge of the back, La. A. small stud, 1, projects from the side of the outside jaw, and when the outside jaw is tamed down and closed with the inside jaw, the stud, 1, in descending will strike the upper edge of the latch, i, and, pressing it: downward, will pass into the notch shown in the latch, when the spring, j, will retract the latch and lock the two jaws together. A long metal pin, I’, is fixed in the outside jaw or in its shank, and is used as a lever for the purpose of revolving the outside jaw on its hinge holt so as to open and close the jaws as required. The pin, V, at ihe proper time strikes against bent cam rods which are fixed in their several positions as hereinafter explained, and when the pin, P, comes in contact *846 with either one of such cam rods, it revolves the outside jaw to which it belongs around the hinge bolt, h, in the direction which may then be required. A pin, Y, passes through the inward extension of each inside jaw and one of the rods, F, or Fa, and thereby secures the set of jaws with their fastenings and connections to the rod, and compels them to move with it. Each pair of rods, F, and Fa, carries two sets of these jaws, with their fastenings and connections. The other set of jaws that is placed upon the rods, F and Fa, is fastened by a similar pin to the other rod, Fa, so that one set of each companion set of jaws is fastened to the rod, F, of each pair of rods, while the other set of jaws is fastened in the same, manner to the other rod, Fa. As these rods move in opposite directions, their movements cause the two sets of companion jaws which they carry to alternately approach towards and recede from each other when the machine is in operation.

There are twenty sets of these jaws in the machine shown in the drawings, and they are all made precisely alike and all operate precisely alike. They all have the same kind of fastenings and connections, except that, as 10 sets of jaws stand facing the other 10 sets, one-half of the latches, i, with their fastenings are fixed upon the right-hand edges of the backs, La, while the other half are fixed upon the left-hand edges of such backs. This is done in order that the latches, i, may all be upon the back sides or edges of the jaws as they revolve forward around the central shaft. H is a collar that is perforated, and both rods, F, Fa, pass through it. On the end of rod, Fa, a screw thread is cut long enough to permit a nut to be used on both sides of the collar, with something to spare for adjustments. The rod, Fa, first has the inside nut screwed upon it, then the collar, H, is placed upon it and the second or outside nut is screwed upon it. Upon the other end of its companion rod, F, another collar, H, is fastened in the same manner. The rods, either before or after the collars are fastened to them, are put in their places in the disks, the two sets of companion jaws being placed upon the rods as the rods are being placed in the disks. The sets of jaws are fastened to their respective rods by the pins, Y, V. The smooth end of each rod passes loosely through the collar that is fastened to the adjacent end of its companion rod. This is done only for the purpose of holding the collar better in its place, and is not necessary. In this manner, one of the collars is attached rigidly to one end of one of the rods, and the other collar is attached rigidly to the other end of its companion rod; and one of the sets of jaws is attached to one of the rods, while the other set is attached to the other rod. One rod slides loosely through the inner extension of the inside jaw and through one end of the collar, and the other rod slides loosely through the corresponding extension of the other inside jaw and through one end of the other collar. Upon each one of the collars, H, is fixed a suitable stud, a, and a friction roller, G-. These friction rollers are moved in a direction that is lengthwise with the rods, F and Fa, by coming in contact with the inclines at the ends of sectional cam rings, K, Ka. These cam rings, K and Ka, are placed concentric with the central shaft, B. Only a limited *847 movement of (be friction rollers, G, and rods, F and Fa, is required, as each of the sets of jaws which they carry will not require to be moved more than one inch in either direction in ordinary machines. The sectional cam rings, K and Ka, are inclined near their ends, and are stationary, being fixed rigidly to the frame. As the friction rollers, (1, are carried around by the revolving shaft, they come in contact with the inclined edges of the sectional cam rings, and are thereby forced to nurvo crosswise with the machine until the inclines that are near the ends of the sectional cam rings are passed and the straight edges of the cam rings are reached by the rollers. The friction rollers draw with them the rods, F and Fa, and the two sets of jaws which they carry. In their movements crosswise with the machine, each friction roller belonging to the same companion pair of rods, with the collar and rod and set of jaws which it draws with it, moves in one direction, while the other friction roller belonging to the same pair of companion rods, and the collar and rod and set of jaws which it draws with it, move in the opposite direction. Each set of jaws is fixed nearest to the free-sliding end of the rod that c.arries it, and furthest from the end to which the collar, II, is attached. By means of this arrangement the two sets of jaws that face each other on the same pair of rods approach towards each other when the friction roller's that are attached to those rods are drawn in opposite directions from each other, and when the same friction rollers move towards each other the two sets of jaws will move further apart from each other. By means of the screw thread on each one of the rods, F and Fa, and the nuts, d, on each side of the collar, H, the rods, F and Fa, can be moved and adjusted lengthwise, and the two sets of jaws which are fixed to them as described can be moved permanently nearer to each other or further apart. The friction rollers, (I, bearing against the sectional cam rods, K and Ka, fix and control the relative positions of the opposing sets of jaws, which stand facing each other in the machine', and, by means of screw threads on the bolls, 0, and the nuts, c, by means of which the sectional cam rings, K and Ka, are attached to the frame of the machine, the sectional cam rings, which are opposite to each other across the machine, may be moved closer together or further apart, and in this way the opposing seis of jaws may be moved permanently either nearer together or further apart, as may be desired.

At the inside edge of the jaws, next to the back, La, is cut an annular channel, W, to receive the can head. The front edge of the channel, W, forms an annular shoulder that covers the front edge of the rim of the can head and forms an abutment against which it may bear. This annular shoulder reduces the open diameter within the jaws so that it is just small enough to surround the end of the can body, and guide it into the rim of the can head when the can head is forced forward. From this annular shoulder to the outward edge of the jaw the jaw flares outwardly, thus increasing the diameter of the ring formed by the closed jaws as it extends forward from the can-head channel, W. By this arrangement the end of the can body is received in the inside jaw, L, at a point where the diameter of the jaw is greater than the diameter *848 of the can body, and, if the can body is irregular or out of shape, it will be inclosed by the jaws, and headed the same as though it was exactly round when the jaw received-it. In Fig. 5 of the drawings is shown a bent lever, m, which is pivoted at n. This lever is bent downward, so as to pass underneath the inside jaw, L. After passing underneath the jaw the inner end of the lever rises up between the jaws. At' the inner end of the lever, m, is fixed an attachment that is shaped so as to fit the side of the can body when one is in the jaws. A friction roller, t, mounted on the end of a stationary stud arm u, is permanently located at the proper point, so that the shorter end of the lever, m, will come in contact with it and force the attachment at the inner perpendicular end of the lever against the can, and thereby force it out from its place in the jaws. This should occur after the heads have been forced upon the can body, and just when the jaws have opened and the two sets have slightly drawn apart so as to loosen their pressure on the can, and at the point at which it is desired to eject the headed can from the machine. Each of the outside jaws has fixed to it a long pin, P. By means of these pins, and the two pairs of bent rods, R, R, and S, T, these outside jaws are opened and closed as explained. Another pair of short cam rods, r, r, are used for unlocking the outside jaws from the inside jaws, so as to permit the outside jaws to open at the proper time. The cam rods, R, R, are bent in a partially spiral form, and located so that the pins, P, P, of two opposite sets of jaws will come in contact with them and be turned by them in the directions desired. The pins, P, P, always come in contact with the cam rods, R, R, when the outside jaws to which the pins belong are open and the pins are pointing downward. The pins follow along the cam rods, and are turned by them, and malee the j4aws to which they are attached revolve around their hinge pins, h, and close with the inside jaws. A short cam rod, r, is supported by metal straps attached to the stationary cross rods, 9 and 10, of the machine frame, and is so located that, as the machine revolves around the" main shaft, the under side of the short end of the locking levers, i, will come in contact with the cam rod, r, and be lifted up and made to unlock the jaws from each other, so that they may be separated and opened after the heads have been forced upon the can that is held by them. A similar short cam rod, r, operates in the same way to unlock the opposite set of jaws, and allow them to be opened also. S and T are two stationary cam rods that are bent in a partially spiral form, and placed in the position shown in the drawings, so that, as the machine revolves, the pins, P, P, will come in contact with them when the jaws are closed, and will follow along them lengthwise, and thereby the pins and the jaws to which they belong will be revolved around their hinge pins, h, h, and the jaws opened. In forcing the can heads upon the can body, the two sets of jaws will advance so nearly together that there will not remain a sufficient amount of room between them to allow the outside jaws to swing open at the same time without coming in contact with each other. For this reason, it is necessary that one of the outside jaws should be partly opened in advance of the opening of the other. *849 To accomplish this result, the cam rod, S, extends further up in the machine than does the cam rod, T. One of the pins, P, therefore, comes in contact with the cam rod, S, before the other pin, P, comes In contact with the cam rod, T, and the pin, P, that comes in contact with the cam rod, 8, and the jaw belonging to it will be revolved and partly opened before the other pin, P, and the jaw belonging to it will have commenced to open. The cam rod, S, is fastened to the cross rod, 9, of tire machine above the point at which the pin, P, comes in contact with it. Q, Q, are used as guide rods to guard against accidents. After the can has been headed and ejected from the machine, the two sets of jaws in which the can was headed should remain open until they are carried around under the chute and receive another can body with the heads that are to be placed upon it. While passing along this distance, the outside jaws,of the two sets, if left unguarded, are liable to swing partly shut and not be in proper position to pass under the chute when they reach ii. For this reason, the guide rods, Q, Q, are so placed that the outside jaws will be prevented from closing as they ascend at the back of the machine, and will be guided so that they will pass under the chute in the proper open position to receive the can heads and can body. The upper parts of (he rods, Q, Q, above the points at which they cease to act as guide rods are spread apart and carried upward for the purpose of conveniently fastening them to the cross rod, 7, of the machine frame. They art; also secured lower down to the cross rod, 8, of the frame. The lower ends of these guide rods, Q, Q, are bent so their extreme lower ends will reach under and throw out from the machine any can or can body that may accidentally remain in the jaws instead of being ejected from them at the proper place.

As shown in the drawings, the chute for the can bodies is made of four pieces of angle iron, 2, 2, and 3, 3, fastened together with metal sheets or cross pieces. The lower end of the chute is made so as to coniine the can body as closely as possible, and not interfere with its freely passing through the chute. This is in order to prevent its getting wedged by bounding out of its proper position when it strikes the jaws in its downward passage. The chutes for the can heads are placed at the sides of the chute for the can bodies. Vertical rods, 12,12, serve as the outsides of the head chutes. These vertical rods are held in their positions by suitable brackets, 13, extending across the chutes and secured to their vertical side; pieces. 15. At the inside of their lower ends the rods, 12, have fastened to them a thin metal sheet that extends nearly across the chute, to better guide the can heads into the jaws. The rods, 12, are cut short, so that no part of the jaws can come in contact with them. The thin metal sheets at the inside of the lower ends of the rods extend below the rods. They are hung so as to allow the backs, La, of the jaws to pass under them, and their inside faces should be in line, both vertically and crosswise, with the inside faces of the backs. La, so that the latter will form a continuation of the front side of the chute, while the can head is passing from the chute into the jaw. *850 In order to more certainly guide eacli can bead into its channel, W, in the inner jawr, the chute is divided into two parts. The upper part, 14, is a straight sheet of metal fixed rigidly in its position. The lower part, 10, of the back extends downward in front of the back, La, of each passing jaw as far as practicable, and allows the jaw, L, to pass under it. The can head passes between this downward extension and the face of the back, La. The lower part, 16, is so arranged that its lower end may swing” towards the back, La, of each passing jaw, but not far enough in the opposite direction to allow the edges of the can heads in the chute to pass each other, and thus get wedged therein. At each of the opposite corners of the swinging back, 16, is fixed a lug, 17, by means of which this swinging back is pivoted to the two vertical side pieces, 15, of the chute. These pivots are placed at one side of the vertical line of the back so that the weight of the part will cause its lower end, when unobstructed, to swing towards the back, La, of the passing-jaw. A frame, 6, 6, is rigidly attached to the cross rod, as shown in the drawing. Two strong metal sheets, 4 and 5, are fastened across the chutes, as shown. Below their fastenings these metal sheets are each, respectively, bent far enough away from the chutes to allow the top of the frame, 6, 6, and the cross rod, 7, to respectively pass in between the sheets, 4 and 5, and the chutes. The sheets, 4 and 5, are respectively hooked over the top of the frame, 6, 6, and the cross rod, 7, and hold the chutes in their proper positions. On the sides, towards the back of the machine, the lower ends of the chutes are curved a little forward for the purpose of delivering the heads and bodies of the cans from the chutes into the jaws on a line that is radial with the circle in which the jaws revolve around the central shaft.

The operation of the machine is as follows: The chutes are kept filled with can heads and can bodies. These stand in columns, resting one upon the other, except the lower ones, which rest upon such part of the jaws as happens to be under them. The machine is set in motion, and, as it revolves, the jaws will pass under the chutes, and each set of jaws will receive the lowest can body and also the lowest can head that is in each one of the can-head chutes. The can heads will be at each end of the can body in the jaws. The jaws will pass forward from under the chutes carrying can heads and can bodies with them, and will be followed with the next set of jaws, which will in like manner receive the next can body and next can heads, then in the bottom of the chutes. Each can body and the can heads belonging to it will be carried forward by the jaws as fast as they receive them, and the columns of can bodies and can heads will constantly descend and fill the places of those thus carried away in the jaws. As the jaws pass forward, the pins, P, P, in the outside jaws, will strike against the cam rods, R, R, and those jaws will be turned over and closed with the lower jaws under them. The levers, i, will operate as before described, and lock the jaws together with the can body and can heads fast inclosed within them. The friction rollers, G-, G-, belonging to the rods, F and Fa, which carry that set of jaws, will then come in contact with the inclines at the ends *851 of the sectional cam rings, Ka, at each side of the machine, and will be drawn further apart, thereby drawing the two sets of jaws towards each other, and forcing the can heads upon the can bodies. The under side of tíre short ends of the level's, i, will next strike the upper sides of the cam rods, r, r, and unlock the outside jaws from the inside jaws. .Before the short ends of the levers, i, i, have passed the entire length of the cam rods, r, r, the pins, P, P, will have struck the cam rods, S and T, and opened the jaws far enough so that they cannot close together and he again locked before they shall have been fully opened. As the machine continues to rotate, the jaws will be fully opened, and the friction rollers, G-, G, will pass beyond the sectional cam rings, Ka, Ka, and will strike the inclines reaching back from the ends of the sectional cam rings, K, K. Jnst as the rollers strike the sectional cam rings, K, K, and before the sets of jaws are drawn far enough apart to make'it possible for either of ihe can heads to he pulled off from the headed can that is in them, the short end of the bent lever, m, will come in contact with the stationary friction roller, t, and the headed can will be thrown from ihe jaws. As the friction rollers, G, G, pass along the inclines at the ends of the sectional cam-rings, K, K, they will be pressed towards each other, and ihe two sets of jaws to which they belong will he moved to their furtherest limit from each other. They will continue in this position until they have again passed under the chutes, ready to repeat their operation by heading another can. All the sets of jaws in the machine o|)erate exactly alike, and each one of the sets repeats the operations above described.

Undoubtedly, this mechanism of Wheaton, like that of complainants, puts tight-fit ling can heads on the outside of can bodies automatically, to do which there must, of necessity, be mechanism for centering and bringing into exact line with each other the can body and can head, and also mechanism for shaping and sizing the can body, and also for forcing the head and body together. Any device, in order to accomplish the desired result, must do these things. Put ihe question is whether the device of Wheaton, in centering and aligning the can body and can heads, and in shaping and sizing the ends of the can body, and in forcing the heads and body together, uses the elements of the claims patented to Norton, or their mechanical equivalents.

It is apparent that the mechanical construction of Wheaton’s device is quite different from that of the Norton device, and, as a consequence, that the mode of operation of the two machines is, to some extent at least, different. Some of these differences, stated by the appellant, we find to be true. In the Wheaton machine the central shaft revolves, while that of the Norton machine is stationary. The devices that Wheaton connects with his central shaft are two disks, which are made rigid, and, therefore, revolve with the shaft. The device which Norton attaches to his stationary central shaft is an annular cam made in two like pm-Is, which cam is made stationary, and, therefore, does not revolve. Norton’s machine does not have either the revolving central shaft of the Wheaton machine nor the revolving disks which are attached to it in the Wheaton machine. *852 Neither does the Wheaton machine have the stationary shaft nor the annular stationary cams of the Norton machine. The Norton machine has mounted upon its central shaft several sets of arms w7hich revolve around the shaft. The Wheaton machine has no such arms, but has cross rods which pass through holes in his disks, and which are parallel with the central shaft. Norton’s machine lias no such rods. The cross rods in the Wheaton machine support and carry his sets of jaws crosswise of the machine, and the rods themselves move back and forth, crosswise of the machine. Norton’s machine has no rods or devices which carry any jaws or molds crosswise of his machine. Except his pistons, he has no devices that move crosswise of his machine,, and the sole function of his pistons is to force the can heads out of the can-head chute into the annular spaces of the molds, and thereby on the ends of the can bodies. The cross rods of the Wheaton machine are not in the Norton machine, nor is the function which they perform — that of supporting the jaws and moving them forward and backward across the Wheaton machine-performed in the Norton machine at all. That machine does not do that kind of work. In the Norton machine, between the parts of his stationary annular cam there is a ring loosely encircling the main shaft. This ring is provided with radial recesses into which cross pieces are fitted and slide, serving as guides to the parts operating the moving sides of the mold, and insuring a true movement thereof by the cam. The Wheaton machine does not contain this encircling cam ring with its recesses, nor the cross pieces. None of the work which they perform in the Norton machine is done in that of 'Vlfheaton. The molds of the Norton machine open in the direction or its periphery. They seize and hold in one immovable position the can body directly in line with the heads that are in the body of the can-head chutes. The jaws of the Wheaton machine do not open in the direction of its periphery, but open and close crosswise with the machine. The devices for opening and closing the molds of the Norton machine are different from those for opening and closing the jaws of the Wheaton machine. In the Wheaton machine there are two sets of jaws facing each other, which move back and forth crosswise of the machine, and, while moving towards each other, they carry the can heads towards each other, shape and size the ends (but only the ends of the can body that is between them), and then.force the heads upon the body. In that machine, the ends of the can body are received upon the lower part of the flaring jaws. The flaring-makes those parts of the jaws which receive the ends of the can body considerably lower than is the bottom of the edge of the can head that is in its place in the jaws. When the can body is thus received in the'jaws, it is loose, and rests by force of its own gravity upon its extreme ends, and below the level of the can heads. In this position it lies loosely. The jaws of the Wheaton machine, with the can body in this position, move towards each other, and, in so doing, the smaller diameter of the cone-shaped hollow in the jaws travels to the ends of the can body. This causes the ends of the body to be raised by the flaring of the jaws until the body registers with the can heads. In the Norton machine, the interior of the *853 laobi, except at its ends, where exist the annular spaces, conforms accurately in shape and dimension to the exterior of the can body, and the mold, when closed upon the can body, holds it firmly in an immovable position, while the heads are forced by the pistons from their place in the can-head chute into the annular spaces of the mold, and thercAy applies them to the outside of the cau body; the movement of the heads towards the can body being a horizontal one.

Tt is true that at each end of the jaws of the Wheaton machine is cut an annular channel for the reception of the can heads; but it is not true that that machine contains any piston, or any equivalent therefor, for forcing the can heads into those annular spaces, and thereby applying them to the outside of the can body. On the contrary, ih the Wheaton machine, the can heads reach their seat in the annular spaces of the jaws by force of their own gravity, and they are carried in that position in the jaws as they approach each other crosswise of the machine, without any change in the position of the can heads until they are forced on the can body by the coming together of the jaws. The device which, in the Wheaton machine, forces the heads on the can body is not the equivalent of the piston of the Norton machine, for it accomplishes that result, not by forcing the can heads into the annular spaces, and thereby applying them to the outside of the can body, but by bringing the jaws together in the «essentially different operation already described. The absence of the piston of the Norton device, or any equivalent therefor, from toe Wheaton device is of itself enough to make it necessary to adjudge that the device of Wheaton is no infringement upon the Norton den ice; the piston being an essential element of each of the combinations covered by the patent of the complainants.

Judgment reversed, and cause remanded, with directions to the court below to dismiss the bill at complainants’ cost.