US705297A - Embossing-machine. - Google Patents

Description

No. 705,297. 'Patented July 22, |902. n. mcs. EIIBDSSINS MACHINL (Application med Oct. 22, 1901.)

(No Model.)

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No. 705,297. Y Patented luly 22', |902.` H. RICE.

EMBOSSING MACHINE.

(Appue'atio med oct; 22, 1901.)

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provements. press as seen from the right-hand sideof Fig.

UNITED STATES PATENT OEEICE.

YHAMILTON RICE, OF MYSTIC, CONNECTICUT.

ENI'BOSSING--IVIACHINE.`

SPECIFICATION forming` part of Letters Patent No. 705,297', dated July 22, 1902.

v Application filed October 22. 1901. Serial No. 79,574. (No model.i

T0 @ZZ whom t may concern.

Be it known that I, HAMILTON RICE, a citizen of the United States, residing at Mystic, in the county of New London, State of Connecticut, have invented certain new and useful Improvements in Embossing-Machin es, of which the following is a full, clear, and exact description. l

This invention is in the class of embossingmachinescommonly used bybookbinders and printers; and my immediate purpose is to improve the mechanism of such machines, to the end that the greatest power shall be exerted at the instant of theimpact of the embossingdies. This desirable resultgl attain by means of an extremely simple system of cooperating levers, as explained in detail hereinafter.

To assist in explaining my invention,the accompanying drawings have beeny provided, which serve to illustrate the same, as follows:

Figure l is a front elevationv of an embossing-press embodying my newly-invented im- Fig. 2 is an elevation of the said l. Figs. 3 and Alfillustrateinelevation and partly in section a portionof the mechanism .of the said press detached fromV the machine proper, said figures serving to better illustrate the manner of its operation. Fig. 5 illustrates in plan certain elements of the said mechanism. trating the operation of a certain stop-motion provided for the machine.

Referring to the drawings, the letters o, and a denote the end frames ofthe machine. Supported by the said end frames a a', at their upper ends, is a cross-head or frame b, whose opposite ends are enlarged, as at b b2, and bored for the reception of vertically-extend# ing rods c c', and in order to secure the said rods in place the upper portions thereof are threaded to receive nuts c2, as seen in the drawings. The rods c c lie partly within the outer faces of the end frames a a', the said frames being provided with substantially semicircular channelsfor depressions a2 for the reception of the said rods c c', and in order to secure the rods c c in the said semicircular depressions capsav are provided at suitable pointsfon the end frames. Secured to the n lower ends of the rods c c is a cross-frame CZ', which, like the frame l), is enlarged and bored Fig. 6 embraces two views illusat its opposite ends'for the reception of the lower ends of the said rods. The rods c c are threaded at their lower ends to receive nuts c2, which latterserve to bind the cross-frame d to the cross-head b and also to prevent the separation ofthe lowerends of the side frames a ot. lt should now be understood that the rods c c', with the upper cross-bar b and the lower cross-bard, form a rectangular framevWork that isheld in its upright position by the end frames am', but is not rigidly secured Ato said end frames.

In common with the class of machinery to which this inventionrelates theY newly-invented press` is provided with a stationary table or platen on which are mounted suitable dies that are adapted to be engaged by companion dies carried bya traveling table.

vvThe stationary table or platen just nientionedis formed 'as a part of the cross-frame b and is provided by widening the central portion of the'said cross-frame, as denoted by the letter b4. The traveling table or bedplate is mounted upon -a carriage adapted to travel Vupon the rods e o. The said carriage consists of a frame e, having bearings e' e2 formed thereon for the'ieception of the said rods c c. Y'The carriage e is also provided with suitable Ways e3 on its upper side, in which the bed-plate proper7 e4, is adjustably mounted. The carriage e is adapted to travel with a vertically-reciprocating motion upon the rods v 'c c', and in order to. provide very powerful meansfor actuating` the said carriage a peculiar system of toggle-jointmechanism and levers is utilized, one member or link of which joint is denoted by the reference-letter f,

while the companion member or link (which is preferably extensible, as hereinafter described) is denoted by the letters g and g. The `linlff is hinged at its -lo-Wer.-end.to the cross-bar d and at its upper end to the extensible link g g', the upper end of the latter section being hinged to the carriage e. It will now be seen that when power is applied to straighten toggle f g g/ the carriage e Will be caused to travel upward on the rods Ie c,

the highest point in its travel being lreached IOO when the alinement of thesectionsf g g" has been accomplished, vas shown in-Fig. and Whenever the members of thetoggle are moved out of alinernent, as in Fig. 2, the carriage will be lowered correspondingly. When the press is in service, the plate b4 and the table c4 are provided with dies that are adapted to engage each other to emboss any predetermined design upon paper, brass, or other sheet material placed between them. Describing now the mechanism for actuating the said toggle-joint, t-he letter h denotes the initial or driving shaft of the machine, which shaft is mounted in suitable bearings in the end frames a, ct and hears at one end a driving-wheel and at its opposite end a spurgear m. 'lhe-driving-wheel 7a is preferably of considerable weight and serves also as a balance-wheel for the machine. Located beneath the shaft L and extending parallel therewith is a shaft h, having bearings in the frames a a', and mounted thereon is a gear m, that meshes with and is driven by the spur-gear on. The gear ym is provided on its side with a crank-pin m2, to which is secured one end of thelink o,whose opposite endis connected to the crank-pinp of a crank p. The crank p is mounted upon the projecting end of a rock-shaft s, that extends parallel with the shafts h and 7i and, like the said shafts, is hung in bearings in the end frames a a'. The shaft s has formed thereon a pair of slotted arms s', to the end of each of which is hinged one end of a link s2, the opposite ends of said linksbeing hinged to a rodf, supported in earsfz, formed on the link fof the togglejoint. It will now be seen that when the driving shaft his set in rotation like motion will be impart-ed through the gears m m to the shaft 7L' and also that through the link o, connecting the crank-pins m2 and p', the arm l; and its .shaft s willbe caused to rock in alternatingr directions in their bearings. Therocking of the shaft .simparts like motion to the arms s', formed thereon, which latter through the links s2, connecting the ends of the said arms with the link f, effect the moving into and out of alineinent of the hinged toggle menibers, thereby causing the raising and lowering of the carriage e.

The mechanism for actuating the togglejoint is so arranged as to utilize to the very best advantage the power required to operate the machine, as will be explained. It is apparent that in the straightening of the toggle 'the amount of power required increases as the hinged parts of the toggle approach alinement with each other. It is also apparent that a given amount of power applied to the rock-shaft s will operate to the best advantage, just as the hinged ends of the links s2 approach alinement with the center of the shaft s. Therefore in order that the power applied to the shaft s may be used to the best advantage the said shaft is so located that the alinement of the hinged points of the toggle-joint and the alinement of the hinged ends of the links s2 with the center of the shaftsareaccomplishedsimultaneously. The arm p is located at such an angle on the shaft s relatively to the arms s that the power applied thereto (through the link o) is utilized to the very best advantage to effect the rocking of the said shaft, the position of the said arm p being such that the centers of the pins m2 and p' come into alinement with the center of the shaft h simultaneously with the alinement of the centers of the hinged ends of the links .s2 and the shaft .s and with the alinement of the centers of the hinged parts of the toggle-joint.

The described arrangement of shafts h' and s and the toggle-joint, together with the several arms and links, enables the machine to run much more smoothly than would otherwise be possible.

As already mentioned, the upper member or link g of the toggle is extensible, such feature being provided in order that the distance between its table e4 and the plate b4 may be regulated by adjustment. To provide such adjustment of the toggle member, the lower portion g thereof is drilled and tapped to receive a screw g2, having a hand-wheel g3 mounted thereon and also a non-threaded extension y,that is received in the toggle portion g. It will now be readily understood by reference to Fig. 3 that upon the rotation of the wheel g3 the screw g2 will be caused to travel in the toggle portion g, thereby lengthening or shortening the link g g.

The confronting ends of the lower toggle memberf and of the portion g of the upper toggle are each recessed to receive between them a short bar t, and also at the points where the toggle members are hinged to the cross-frames @and d the said frames and adjacent ends of the toggle members are likewise recessed to receive similar short bars t. In order to hold the short bar t in position in the recesses of the cross-bars e and d, caps t are employed, and in order to secure the toggle-links thereto and to each other, and to secure the short bar t between the adjacent ends of the toggle, ears t2 are secured to the said toggle-links, in which ears the end portions of the hars t are secured. As seen in IIO Fig. 4, these ears are inversely arranged, each being cut away at one end or side to allow of its being engaged over the short shaft t. When the toggle is operated to raise or lower the carriage e, the links of the said toggle ride upon the pieces of short bar t, which are preferably of steel or phosphor-bronze and capable of resisting very great pressure. A very strong hinge-joint is thus provided.

The driving-wheel 7c of the press is provided with a friction-clutch c, that is engaged by an arm 7a2, mounted upon a shaft u, which latter is supported in suitable bearings on the frame a. The shaft u also has mounted thereon an arm 7c3, whose outer end is connected by a spring 7a4 with a suitable point on the frame al, the said spring acting normally through the arms 7c3 k2 to hold the friction-clutch out of engagement with the wheel 7c. Secured to the outer end of the arm 7c3 is a link @,connecting the said arm with a treadle w, which latter is pivotally secured to the cross-frame d and is adapted to' be operated to rocktheshaft u (through thelinko and arm k3) to cause the arm k2 to carry the clutch into engagement with the Wheel la against the resisting force of the spring'7c4. In addition to the arms k2 k3 the shaft u also carries an arm y, on the end of which there is located a roll y', adapted to engage a notched wheel z, mounted upon the shaft h. In Fig. l and also in left-hand View of Fig. 6 the arm y is in such position that its roll 'yf lies in a notch z of the Wheel z, andwhen in such position the clutch lo is out of engagement with the wheel 7c and the machine is at rest. When it is desired to operate the machine, the treadle w is manipulated to rock the shaft u, so as to carry the clutch k toward the wheel k and to cause the roll y to travel outward in the notch z. The just-described operation is continued until the clutch 7a' be-` gins to lock itself to the wheel k to set the machine in motion. When the wheel z begins .to rotate, a beveled side z2 of the notch z' engages the roll y to force the roll out of the said notch, as will be understood by reference to Fig. 6, thereby forcing the clutch k' into still closer engagement with the wheel k. After Vleaving the notch z the roll yrides upon the side of the wheel z, as shown in the right-hand View of Fig. 6, until another notch again comes coincident there-y with, when the roll at once drops into said notch and the machine ceases to operate.

It will now be seen that the last-described mechanism provides a stop-motion whereby the operation of thev machine is automatically controlled.

Assuming that a machine constructed as illustrated and described has been provided and that it is desired to use the same, the operation is substantially as follows: The material to be operated upon is placed onthe lower or traveling plate or table e4, or rather upon the bed-die `mounted thereon. The

clutch lc controlling the drivin g-Wheel is then operated to set the machine in motion, which results in causing the said table to travel upward and carry the dies thereon into engagement with those of the stationary platen b4.

The material to be embossed (lying between the dies of the stationary and traveling plate) meanwhile receives the impress of the dies. The said dies are indicated in the drawings by dotted lines and are adapted to be heated, as is common in this class of machinery; but as the said dies and the manner of heating them form no part of this inventiony it is thought unnecessary to illustrate or describe` y in vertical line with said platen, bed-plate and toggle for operating said toggle consisting of rock-shaft s and links s2, and means for rockingshaft s consisting of a crank fm2 and a rod o connecting said crank with the said rookshaft. Y y

2. The combination of the driving-shaft, the fixed platen and the movable bed-plate, of toggle members connecting said bed-plate and a xed portion of the frame for operating the bedplate, a gear on said shaft, a shaft parallel with the driving-shaft, a gear thereon meshing with the gear on the driving-shaft disposed in vertical alinement with said platen, bed-plate and toggle members, a crank-pin on the last-mentioned gear, a link connected thereto, a crank and crank-pin connected to the other end of said link, a rockshaft connected to said crank-pin and a connection between said rock-shaft and one of the toggle members, as set forth.

Signed at Mystic, Connecticut, this 7 th day of October, 1901.

HAMILTON RICE.

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