US542190A - Bridge city punch - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

G. GUILD.

STEAM SHBARS.

No., 542,190. Patented July 2, 1895.

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(No Model.) 2 Sheets-Sheet 2.

e. GUILD. STEAM SHEARS. No. 542,190. Patented July 2, 1895..

@eg @W3 UNrriDvv STATES PATENT OFFICE.

GEORGE GUILD, OF CAMBRIDGE CITY, INDIANA, ASSIGNOR TO THE CAM- BRIDGE CITY PUNCH, SHEAR AND ROLL COMPANY,` OF SAME PLACE.

STEAM-SH EARS.

SPECIFICATION ,formingl part of Letters Patent No. 542,190, dated July 2, 1895.

i Application filed February 20, 1895. Serial No. 539,034. (No model.)

To all whom t may concern.-

Beitknown thatl, GEORGE GUILD, a citizen of the United States, residing at Cambridge City, in the county of Wayne and State of Indiana, have invented new and useful Improvements in Steam-Shears, of which the following is a specification.

My invention relates to certain new and useful improvements in shearing-machines; and it consists in means of peculiar construction for operating the shearing knife and other auxiliary parts by means of duid-pressure, as will be hereinafter more fully set forth.

The object of my invention is to provide means whereby the knife-head and the holding-down headare caused to operate almost simultaneously by fluid-pressure by means of a common controlling-valve, and also means by which the hold'down may be instantly released and simultaneously operated to raise withthe knife-head, and also to provide means whereby the .holding-down head will automatically adjust itself to any thickness of metal or other material to be shearedand i firmly clamp and hold the same While being sheared. I attain these objects by means of the mechanism constituting the machine illustrated in the accompanying drawings,in which similar numbers and letters of reference des-v ignate like parts throughout the several views. Figure 1 is a front elevation of the machine. Fig. 2 is an end elevation of the same. Fig.

3 is a sectional end elevation taken through the line AfB. (See Fig. l.) Fig. 4 is an enlarged detail sectional elevation of the main or knife-head-actuating cylinder and the lower holddowlractuating cylinder, taken through the line AB. (See Fig. 1.) Fig. 5 is an enlarged detail sectional view of the main or knife-actuating cylinder, the lower holding-down-actuating cylinder, and the valve cylinder-supporting' beam 3, securely bolted at its ends to the top sides of the housings l, and the table 4, securely bolted at lthe ends of the inner sides of-said housings l.

The knife-head 5 has its bottom or knifeedge horizontally inclined-that is, inclined with regard to the edge of the bottom knife, which is preferably ush-with the top surface of the table 4, and is adapted to accurately fit and to slide or reciprocate vertically in suitable guideways 6, formed in the housings 1, said knife-head provided with the upy wardly-projecting pieces or ears 7, formed integral on the top end edges thereof. To the ears 7 are pivoted the knife-head-actuating Ylevers S, which have their long or power ends directed toward the center of the machinethat is, toward the actuating cylinder, said lever ends pivoted to the bottom ends of the adjusting links 9, said levers 8 fulcrumed on the fulcrum links 10, which are pivoted on the fulcrum stands 11, secured firmly on the top beam 3, or they may be formed integral thereon.

Intermediate between the ends of the beam 3 is firmly secured the hollow piston 12, (see Fig. 3, and detail, Figs. 4 and 5,) which is provided with the lower port or opening 13 and the upper port or opening 14. This piston is also grooved with peripheral grooves at or near its top end, whichare adapted to receive suitable packing rings l5, used in mechanism of this class.

The cylinder 16 is adapted to accurately lit and to traverse longitudinally on its piston 12,'said cylinder having the cross-head 17 securely bolted on its top closed end, and to the ends of which are'pivoted the top ends of the connecting-links 9. The connecting-links 9, which are on opposite vsides of the cylinder 16, are preferably composed of two stubs or sections connected at their threaded ends by the usual well-known form of turnbuckle 18, by which adjustment may be made to take up lost motion or play. In a parallel plane in front of the knife-head 5 and above the ta ble 4 the holdingdown head or gate 19 is mounted in suitable ways 20, formed in the end housings 1, and in which the guide ends of said holding-down head slide or traverse vertically. The holding-down head 19 is op IOO usual stuffing-box and gland through which Formed integral on the said cylinder 22, or firmly bolted thereto,

the piston-rod 23 works.

is the valve-box or steam-chest 27, which is preferably cylindrical in forni, and in which the hollow piston-valve 28 is fitted to form a steam-tight joint, and is adapted to slide longitudinally therein, said valve having its eentral portion reduced in diameter to permit the exhaust or used steam o-r other Huid under pressure to be freely discharged through and from either the top or bottom ports a or Z) into and through the exhaust-pipe 2.9 into the atmosphere. Motion is communicated to the said valve 28 by means of the rod 30, which passes through the stuffing-box 3l and the gland 32 on the top end of the said valvebox 27.

Connected tothe top end of the valverod 3() is the starting-valve lever 32, which is pivoted on the arm 33, which latter may be either formed integral on the beam 3 or firmly bolted thereon, said lever having its outer or opposite end connected to the top end of the connecting-rod 34, the latter having its bottom end connected to the end of the treadlelever 35, by which the said valve mechanism is operated manually.

Steam or other fluid under pressure is admitted into the steam-chest 27, at the bottom end thereof, by means of asuitable pipe connection, as 36.

In order that the bottom edge of the holding-down head 19 may be maintained in an approximately horizontal position, yet at the same time be permitted, when forced against the material on the shearing-table 4, to clamp or retain it in position while being sheared, as a plate of unequal thickness or a tapered plate, and at the same time to yield at either end or swing in a longitudinal direction to accommodate its lower clamping-edge to the surface of such a plate or plates to clamp and hold t-he same firmly, I provide the steadying-arms 37 and 3S, pivoted at their bottom ends on said holding-down head 19 at points equally distant apart from the pivotal center of' the piston-rod 23 and at greater distances apart than their top pivotal ends, which are pivoted on the ends of the compensating crosshead 39, said cross-head being of rectangular section (see Figs. 6 and 7) and accurately fitted into a similarly-formed slot formed in said piston-rod 23, above the pivotal point thereof, and in which said cross-head is adapted to slide or play slightly in a longitudinal direcA tion to permit the holding-down head to accommodate its clamping-edge to sheets of varying or irregular thicknesses.

The table 4, it will be observed, is reinforced at. its under inner edge by the reinforcing-rib 40, for the purpose ot' resisting the stress falling on the lower knife 4l while the machine is shearing a plate.

The operation of the machine is simple and rapid and will be readily understood.

The plate to be sheared or dressed is placed on the top of the table 4,witl1 that portion to be sheared or trimmed off lapping over the cutting-edge of the bottom knife 41, and may be fed intothe machine either manually or by means of suitable mechanism provided therefor. When the plate is placed in position to be sheared, the treadle-lever 35 is operated to lower the valve 28 and to open the port a, to the driving fluid, which forces the piston of the small or holding-down cylinder and its rod 23 down, thereby causing the holdingdown head 19 to firmly clamp the plate under treatment. The greater portion `of the fluid passing through the port a, leading into the cylinder' 2.2, at its top cud, is discharged into and through the opening 13, formed in the bottom of the fixed piston l2, thence through the opening 1li into the space between the top end ofthe fixed piston 12 and the interior top end of the cylinder 16, thereby causing the said cylinder '16 to traverse or slide longitudinally and upwardly on ,its piston 12, which movement causes the knife-head to descend or to move toward its opposite or lower shearing-knife through the medium of the simultaneously actuating or operating levers 8.

It will be readily understood from an examination of the drawings, especially Figs. 1, 3, and 5, that immediately the treadle is released the valve 28 is free to move upwardly into the position shown in Fig. 5, and the fluid in the upper and lower cylinders will be eX- hausted through the port aand the other openings in the reverse order in which the fluid entered, thereby permitting the cylinder 16 to descend to raise the knifehead 5. Simultaneous with this movement the steam or fluid under pressure is admitted through the port b into the bottom end of the cylinder 22 to raise its piston and rod 23, thereby elevating the holding-down head and releasing the plate undergoing operation. f

It will be readily seen that a fixed cylinder could be substituted for the moving or traversing cylinder illustrated in the drawings and a moving or reciprocating piston provided 'to work in said cylinder, said piston having the cross-head 17 attached to the outer end of its piston-rod, thereby in the same manner communicating motion to the knifehead 5, through the levers 8, Without departing from the spirit of my invention; but I prefer to use the arrangement herein described, and illustrated in the accompanying drawings, for the ICO 'reason that the greater weight of the traversing cylinder 16 is sufficient' to -cause the return of the said knife-head when said cylinder is released of pressure.

An overhanging arm, either formed integral or firmly secured o n the knife-head at the end thereof, as K, and adapted to alternately engage the upper and lower trips or stops T, secured on the connecting-rod 34, may be employed to automatically operate the actuating or starting valve 28 when a continuous reciprocating movement of the knife-head 5 is required.

Having thus fully described the construction and operation of my invention, what I claim as new and useful, and desire to cover by Letters Patent of the United States therefor, is-

l. In a steam or other iiuid actuated shearingmachine, the combination with a descending knife head, and a fixed shearing table, of a IiXed piston centrally disposed over said knife-head, a cylinder adapted to slide vertically on said piston, levers pivoted on the top outer ends of saidv knife-head, and having their power ends directed toward said cylinder, fixed fulcrum blocks, and links pivoted on said blocks and the fulcrums of said levers, all substantially as and for the purpose set forth. e

2. In a steam or other fluid actuated shearing machine, the combination with adescend.- ing knife head, a fixed shearing table and its supporting frame, of a fixed piston centrally disposed over said knife-head, a piston supporting beam, av cylinder adapted to slide vertically on said piston, levers pivoted on the top cuter ends of said knife-head and having their power ends directed toward said cylinder, fulcrum links hinged to said beam and to the fulcrum centers of said levers, connecting rods connecting the power ends of said levers to said sliding cylinder, and suitable means whereby the actuatingiluid is admitted into and exhausted from said cylinder, all substantially as and for the purpose set forth.

3. In a steam or otherfluid actuated shearing machine, the combination with a holdingdown head and its actuating cylinder, of a piston-rod depending from said cylinder and pivoted on said holding down head at its lower end, said rod having a slot above its pivotal point, a crosshead accurately fitting and adapted to slide in said slot, arms pivoted at their top ends to said cross-head and having their bottom ends pivoted on said holding down head on opposite sides of said piston rod, all substantially as and for the purpose set forth.

4. In a steam or other fluid actuated shearing machine, the combination with a descending-knife-head, a` descending holding-downhead, a shearing table and its supporting frame, of a fixed piston centrally disposed over said knife-head, a piston supporting beam, a cylinder adapted to slide longitudinally on said fixed piston, suitable knife head actuating levers fulcrumed on said beam on opposite sides of said sliding cylinder, a crosshead on said cylinder, adjustable rods connecting the said crosshead and the ends of said levers, fulcrum blocks on said beam, and fulcrum links connecting the fulcrum centers of said levers and said blocks, all substantially as and for the purpose set forth.

5. In a steam or other fluid actuated shearing machine, the combination with a descending knife-head, a descending holding downhead, a shearing table and its supporting frame, of a hollow vertical piston centrally disposed over said knife-head, a piston supporting beam, a cylinder adapted to slide on said piston, levers pivoted on the top ends of said knife-head and having their power arms directed toward the center piston and its cylinder, fulcrum links hinged on said beam and on the fulcrum centers of said levers, connecting rods connecting the power ends of said levers'with said sliding cylinder, a lower fixed cylinder, an actuating piston rod depending therefrom and having its lower end pivoted on said holding down head, said rod being slotted immediately above its pivotal end, a crosshead adapted to slide longitudinally in said slot, depending or outwardly extending steadying arms pivoted to said crosshead and to said holding-down head on opposite sides of said piston rod, and a suitable starting valve connecting with both the actuating cylinders, all substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

GEORGE GUILD.

Witnesses:

THOMPSON R. BELL, M. M. DEFREES.

ICO

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