US727353A

US727353A - Pressure-exerting machine.

Info

Publication number: US727353A
Application number: US9145902A
Authority: US
Inventors: George W Greenwood
Original assignee: Individual
Current assignee: Individual
Priority date: 1902-01-27
Filing date: 1902-01-27
Publication date: 1903-05-05
Anticipated expiration: 1920-05-05

Description

G. W. GREENWOOD.

PRESSURE EXERTING MACHINE.

APPLIOATION FILED JAN. 27, 1902.

N0 MODEL.

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GEORGE IV. GREENWVOOD, OF CLEVELAND, OIIIO.

PRESSURE-EXERTING MACHINE.

3PECIFICATION forming part of Letters Patent No. 727.353, dated May 5, 1903.

Application filed January 27,1902. Serial No. 91,459. (No model.)

pressure-exerting machines suitable for use in gripping, pressing, and forging operations-as, for instance, in gripping or exerting pressure against a blank or stock which is to be converted or formed into a predeter-- mined article of manufacture; and the invention pertains more especially to a machine of the character indicated which comprises a suitably-guided pressure-exerting block capable of reciprocation and actuated by a suitably-operated toggle-joint.

The primary object of this invention is to provide improved means for avoiding breakage of or injury to any portion of the mechanism of the machine by an excess of material to be operated upon by the pressure-ex erting block or by any obstructing matter obtaining ingress to the space entered by the blank, stock, or material which is to be pressed against or otherwise operated upon by the said block.

With this object in view and to the end of realizing other advantages hereinafter appearing the invention consists in certain features of construction and combinations of parts hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure I is a top plan of a portion of a pressure-exerting machine embodying my invention. Fig. 11 is a vertical section on line II II, Fig. I, looking in the direction indicated. by the arrow. Fig. III is a vertical section on line III III, Fig. II, looking in the direction indicated by the arrow. Fig. IV is a horizontal section on line IV IV, Fig. 11, looking upwardly. Fig. V is a perspective view of a toggle-joint employed for the purpose hereinafter appearing; and Fig. V1 is a bottom plan of the travel arranged parallel with the shaft b. The

shaft 1) and the block 71. are arranged, therefore, parallel and a suitable distance apart longitudinally of the bed a.

The block h is arranged to operate between two guide-forming'walls 5 and 6, provided upon the bed a and arranged at the inner side and outerside, respectively, of the path of the said block.

The block h is operated bya togglejoint arranged at one end of the said block'h between the said block it and a thrust-block 'n. The knuckle m of the said toggle-joint has a shank or arm 7 extending toward the head 30 of a slide 25 and pivoted vertically, as at 8, to the said head. The slide 25 is capable of reciprocation and arranged to operate be tween the shaft 1) and the travel of the block it. The said toggle-joint is, therefore, operatively connected at its knuckle m with the head 30, and the slide 25 is operatively connected by a pitman e with the crank 9 of the shaft 1), and the bed a is provided with walls 10, arranged to form guides for the said slide.

The two links rand t of the toggle-jointconnect the toggle-knuckle m with the blocks '22 and h, respectively. The toggle-joint is applied in the usual manner, having opposite ends of its link '15 pivoted vertically, as atf, to the toggle-knuckle and to the block it, respectively, and having opposite ends of its other link 1" pivoted vertically, as at g, to the toggle-knuckle m and to the thrustblock n,'respectively.

The block it is provided at the bottom and at'its toggle-joint-connectiug.end with a flat horizontallyarranged extension 70, which normally extends in under the toggle-joint. The block extension is provided at its outer side edge with an upwardly-projecting flange 18, extending from the block proper to the outer or free end of the extension 75. The flange 18 has hearing at its outer side against the inner surface of the adjacent portion of the bar 6, which extends along the said flange toward the thrust-block n.

The slide 25 of the machine illustrated being employed in transmitting power to the aforesaid toggle-joint is properly termed a toggle-slide, and the head or part 30 being directly connected with the arm 7 of the knuckle of the said toggle-joint is properly called a toggle-slide head. The toggleslide 25 rests upon the bottom of the recess or slideway formed between the walls 10. The toggle-slide head 30 is arranged within and movable endwise of a correspondinglyshaped chamber 26, which is formed in and extends longitudinally and is open atthe outer end of the slide 25. The pivot 8 extends through the arm 7 into the head 30 and not into the slide 25; but the pitman e is attached directly to the slide 25 and not to the head 30. During the operation of the pitman e the head 30 moves with the slide 25, so as to result in the actuation of the aforesaid toggle-joint; but the head 30 is yieldingly held in position within the slide 25, as will hereinafter clearly appear.

The block it should adequately engage and operate upon the stock, blank, or material (not shown) to be engaged or pressed against, and the arrangement of the parts is such, therefore, that the block h shall have commenced to operate before the toggle-slide 25 has completed its stroke in the direction of the said block 72, and the toggle-slide head 30 shall be capable of yielding, if necessary, during the said stroke after the block it has commenced to engage the work, as aforesaid, so that the liability of any excess of material or obstructing matter against which the block it is actuated resulting in breakage or injury to the toggle joint and connected parts is reduced to a minimum.

The subject-matter of this application pertains to improvements in connection with the yieldable means acting to retain the toggleslide head 30 in its normal position within the toggle-slide 25, and the said yieldable means comprises a vertically movable or yieldable block j, which is arranged within and movable endwise of the chamber of a case 27, which is formed upon the top of the toggle-slide 25. The case 27 is preferably cylindrical and screw-threaded internally at its outer end and engaged by a correspondingly-threaded plug 10, which closes the outer end of the said case, and a spring 8 is confined within the chamber of the case 27 between the opposing surfaces of the plug 13 and the blockj.

The case 271s enlarged at its lowerend, as at 17, longitudinally of the toggle-slide 25, and the lower portion of the chamber of the said case is correspondingly enlarged longitudinally of the said slide and connects with the chamber 26 in the said slide and is in open relation at the said end with a chamber 31, formed in the upper portion of the toggle-slide head 30.

A toggle-joint or toggle device is arranged at the under side of the block j, between the said block j and the toggle-slide head 30, and extends from within the lower enlarged end of the case 27, at a point between the block j and the inner end of the toggle-slide 25, downwardly andin the direction of the outer end of the head 30 and into the chamber 31 of the said head. The said toggle-joint or toggle device is arranged with its knuckle centrally of the under side of the blockj and engaging a recess 16, formed in the under side of the said blockj. The said last-mentioned toggle-joint or toggle device has therefore one of its links and link a; in the case illustrated arranged in the main within the enlarged lower end of the chamber of the case 27 and pivoted, as at u, horizontally and transversely of and to the toggle-slide 25 at the lower end of the said case. The said link 00 extends from the pivot downwardly and in the direction of the outer end of the toggle-slide head 30 to the under side of the blockj and terminates below the said block j in a cylindrical tubular journal 15, which is arranged horizontally and transversely of the said head parallel with the pivot u and has hearing within the recess 16 of the block j against the under side of the said blockj. The other link y of the toggle-joint or toggle device now being described extends from withinthejournal of the link 00 preferably downwardly and in the direction of the outer end of the toggle-slide head and is arranged in the main within the chamber 31 of the said head and terminates at its lower end in a journal 14, which is arranged horizontally and extends transversely of the said head parallel with the journal 15 and forms the pivotal connection between the said link 1 and the said head and has bearing upon the bottom of the said chamber 31. Thelink y has its opposite or upper end terminating in a journal 13, which has bearing within and is arranged parallel with and extends from end to end of the journal 15.

The journal 15 has its lower portion slotted laterally and longitudinally, as at 12, to accommodate the location and movement of the link y during the operation of the toggle-joint comprising the said link y. The journal 15 has one end thereof completely surrounding the journal 13, as at 0, as shown in Figs. V and VI, and the slot 12 extends to and is open at the opposite end of the said journal 15 at the bottom of the journal, as at d; but the end 61 of the slot 12 is just wide enough to receive the body portion of the link y, so that the journal 13 of the link 3 can only be introduced endwise into the journal 15 of the link by placing the link y in the position shown in dotted lines, Fig. V, and the body portion of the link y is out of line with the open end d of the slot 12 when the said toggle-joint is applied and remains thus out of line with the said open end of the said slot during the operation of the toggle-joint, so that the members of the said joint cannot get out of order during the operation of the joint, and the chamber 31 has the dimensions required to accommodate the location and operation of the said joint. The spring sis normally compressed or under tension and, through the medium of the block j and the toggle-joint, which has its knuckle bearing the said block, as already indicated, retains the toggle-slide head 30 in its outer and normal position. The spring 5 is sufficiently powerful to retain the toggle-slide head 30 in its normal position until an abnormal excess occurs in the work provided for the pressureeXerting block or plunger.

The arrangement of parts is such that in the outer and normal position of the toggleslide head 30 the links so and y are arranged somewhat out of line in the direction of the block j, but not enough to cause the said joint to yield too readily at the commencement of the inward displacement of the said head independently of the toggle-slide 25; but obviously the said links x and y will readily yield in the direction required to elevate the blockj against the action of the spring 8 as soon as the toggle-joint comprising the said links so and y has fairly begun to elevate the said block j, and the said toggle-joint very efficiently performs its functions.

To prevent the toggle-slide head 30 from being pushed or actuated outwardly beyond its normal position, and consequently to avoid the movement of the links 00, and 3 into line, a stop is provided and comprises, preferably, a pin w,which extends horizontally and transversely of and through the said head atright angles to the line of travel of the slide 25 into engagement with slots 28, formed in and extendinglongitudinally of the side walls of the chamber 26 of the said slide. In the normal position of the parts the pin to engagesthe forward end walls of the slots 28, as shown in Fig. IV. The pin to and the forward end walls of the slots 28 form an efficient stop for limiting the outward movement of the toggleslide head 30 by the action of the spring 3.

What I claim is-- 1. Thecombinatiomwitha slide,andahead movable longitudinally and independently of the said slide, of a toggle-joint or toggle device having its two links pivotally connected to the said slide and to the aforesaid head, respectively, a yieldable block normally bearing against the knuckle of the toggle device, and a suitably-applied spring acting to retain the said yieldable block in its normal position.

2. The combination,with a slide, and a head movable longitudinally and independently of the said slide, of a toggle-joint or toggle device having its two links pivotally connected to the said slide and to the aforesaid head, respectively, a yieldable block normally bearing against the knuckle of the toggle device, a suitably-applied spring acting to retain the said yieldable block in its normal position, and means for preventingthe aforesaid head from being moved outwardly beyond in its normal position, substantiallyas and for the purpose set forth.

3. Thecombination,withaslide,ahead-supported from and movable longitudinally and independently of the said slide, and means for reciprocating the said slide, of a togglejoint connected, at one end, to the said slide outside of the aforesaid head and extending in the direction of the outer end of the head; yieldable means acting to cause the togglejoint to push the head outwardly, and means preventing the head from being actuated outwardly beyond its normal position, and the arrangement of the parts being such that the toggle-joint, in the normal position of the head, shall have its links'arranged somewhat out of line in the direction of the aforesaid yieldable means.

4. The combination, with a positively-actuated slide, a head supported from and movable longitudinally and independently of the said slide, and means for reciprocating the said slide, of a toggle-joint pivotally connected, at one end, with the said slide and having its other end arranged to push the aforesaid head outwardly; yieldable means acting against the knuckle 0f the toggle-joint, and means for preventing the said head from being actuated outwardly beyond its normal position, and the arrangement of the parts being such that the links of the toggle-joint shall be normally out of line in a direction opposite to the direction of action of the aforesaid yieldable means.

5. Thecombination,withapower-transmitting slide, and a head supported from and movable longitudinally and independently of the said slide, and means for reciprocating the said slide, of a toggle-joint connected, at one end, to the said slide outside of and above the aforesaid head and extending downwardlyin the direction of the outer end of the head; yieldable means acting downwardly upon the knuckle of the toggle-joint, and means preventing the said head from being actuated outwardly beyond its normal position, and the arrangement of the parts being such that the toggle-joint, in the normal position of the said head, shall have its links arranged somewhat out of line upwardly, substantially as and for the purpose set forth.

6. The combination,withapower-transmitting slide, and a head supported from and movable longitudinally and independently of the said slide, and means for reciprocating the said slide, of a toggle-joint connected, at one end, to the said slide and having bearing, at its other end, in the aforesaid head; a block mounted upon the knuckle of the toggle-joint; means acting to depress the said block, and means preventing the aforesaid head from being actuated outwardly beyond ally connected, at one end, to the said slide and having its other end arranged to push the aforesaid head outwardly; yieldable means acting against the knuckle of the toggle-joint, and means for preventing the said head from being actuated outwardly beyond its normal position, and the arrangement of the parts being such that the links of the toggle-joint shall be normally out of line in a direction opposite to the direction of action of the aforesaid yieldable means, and the knuckle of the said joint comprising a journal formed on one of the links of the joints and having bearing in a hollow cylindrical journal formed on the other link of the said joint, with the said hollow journal having a lateral slot arranged to accommodate the location and operation of the first-mentioned link and open at one end, substantially as and for the purpose set forth.

8. In a machine of the character indicated, a power-transmitting slide comprising a slide; a head supported from and movable longitudinally and independently of the said slide; means for reciprocating the said slide; a toggle-joint pivotally connected, at one end, to the said slide and having its other end arranged to push the aforesaid independentlymovable head outwardly; a yieldable block normally bearing against the knuckle of the toggle-joint; a suitably-applied spring acting to retain the said block in its normal position,

and means for preventing the aforesaid head from being actuated outwardly beyond its normal position, and the arrangement of the parts being such that the links of the togglejoint shall be normally out of line in the direction of the aforesaid block, and the said block being recessed upon its toggle-facing side to receive and affording bearing to the toggle-knuckle.

9. In a machine of the character indicated, a power-transmitting slide; a head supported from and movable longitudinally and independently of the said slide; means for reciprocating the said slide; a toggle-joint pivotally connected, at one end, to the said slide and above the aforesaid head and extending in the direction of the outer end of and into the said head and arranged with the axis of its knuckle transversely of the said head; yieldable means bearing downwardly upon the said knuckle; means for preventing the said head from being actuated outwardly beyond its normal position, and a casesurrounding the aforesaid yieldable means and enlarged at its lower end longitudinally of the aforesaid slide, and the arrangement of the parts being such that the links of the togglejoint shall be normally out of line in a direction opposite to the direction of action of the aforesaid yieldable means, and the aforesaid case and the said slide and the aforesaid head being chambered to accommodate the location and operation of the toggle-joint and the aforesaid yieldable means.

In testimony whereof I sign the foregoing specification,in the presence of two witnesses, this 22d day of January, 1902, at Cleveland, Ohio.

GEORGE W. GREEN WOOD.

Witnesses:

O. H. DORER, TELSA SCHWARTZ.