US471778A - tucker - Google Patents

Description

(No Model.) 6 Sheets-Sheet 1. S. D. TUCKER. PRESS.

Patented Mar. 29, 1892.

TENS co, wofOiLmm, vusnmmom n. c.

(No Model.) 6 Shets-Sheet 2.

S; D. TUGKI'IIL PRESS.

No 471,778. Patented Mar. 29, 1892.

(No Model.) 6 Sheets-Sheet 3.

S. D. TUOKER.

PRESS Patented Mar. 29, 1892.

A t e e h S m e e S R E E TR .P D s (No Model.)

No. 471,778. Patented Mar. 29,1892.

(No Model.) 6 Sheets $heet 5. I

S.DV.TUGKB'R. PRESS.

No. 471,778. A Patented Mar.v29,'1892. g

(No Model.) 4 6'Sheets -Sheet 6.

' S. D. TUCKER.

PRESS.

No. 471,778. Patented Mar. 29, 1892.

@is flllllir UNiTED JTATESK' 'ATENT Erica.

STEPHEN D. TUCKER,-OF YORK, N. Y.

PRESS.

SPECIFICATION forming part of Letters Patent NO. 4='71,778, dated March 29, 1892 Application filed May 13, 1891. $erial No. 392,642- (No model.)

To all whom it may concern:

Be it known that I, STEPHEN D. TUCKER, a citizen of the United States, residing at New York, county of New York, and State of New York, have invented certain new and useful Improvements in Presses,fully described and represented in the following specification and the accompanying drawings, forming a part ofplaten of the press shall be automatically and,

instantaneously stopped at the desired point in its movement in both directions.

For a full understanding of my invention a detailed description of a press of the preferred construction embodying the same.will now be given,reference being had to-the accompanying drawings, forming a part of this specification, in which Figure 1 is a front elevation of an electro typers power-press, showingthe platen in its lowest position. Fig. 2 is a partial side elevation of the same. Fig. 3 is a horizontal section on the line 3 S'of Figs. 1 and 2, some of the parts being omitted for clearer illustration. Fig. 4 is a vertical section on the line 4 4 of Fig. 3. Fig. 5 is a similar view showing the parts in a different position with the platen raised. Fig. 6 is a detail of the shifting rods. Figs. 7 to 14 show a modified form of brake trip mechanism. Fig. 7 is a side elevation showing the parts in their normal position with'the driving mechanism out of op-V oration and the platen in its lowest position. Fig.8 is a plan view of the same. Fig. 9 is a section on the line 9 9 of Figs. 7 and 8, looking to the right. Figs. 10, 11, and 12 are details on an enlarged scale, showing the parts in different positions; and Figs. 13 and 14 are details hereinafter referred to.

Referring now to said drawings, A is the frame of the press; B, the head supported at the top of the press and against which the typeform and mold are pressed; G,thc platen of the press, and D a table provided for the convenient insertion and removal of the typeform and mold.

The platen G is operated by means of a pair of toggles E on each side of the press, each pair being pivoted together at at, their upper ends to the platen at b andtheir lower ends to the frame at c. The toggles and pivots preferably extend throughout the entire width of the platen, as shown, so as to secure a uniform pressure, and for the same purpose theplaten and head are preferably constructed of heavy rigid bodiesof metal. The toggles are operated through links F on each side of the press, pivoted at their outer ends to the central pivots a of the toggles and at their inner ends pivoted at cl to a nut G, threaded upon acentral screw-shaft H,which is mounted in the frame A, so as to rotate without longit-udinal movement. ries at its lower end a beveled gear I, which is operated by means of a beveled gear J, carried by a shaft L, mounted in the frame A and in a bracket M, secured thereto. This shaft L is driven by a double friction-cone N, carried thereby, this cone being driven by means of hollow cone driving-pulleys O P, mounted on opposite sides of the cone N and driven in opposite' directions by bolts, as shown, or other suitable means. These driving-pulleys O P are mounted loosely upon the shaft L and are provided, respectively, with shifting levers Q R, pivoted to the frame at e and connected to the pulleys by means of the usual collar or in any other suitable manner, so as to allow rotation of the pulleys independently of the levers.

For the purpose of shifting the pulleysO P for the reversal of theplaten and to stop the platen at the desired point on its movement in either direction, the following means are provided: To the upper ends of the levers Q R, respectively, are pivoted shifting rods S T, which extend across the frame A and outside the same on the opposite side of the machine and slide in guides g on the frame and on a bracket U, secured to the frame on the side opposite the bracket M. These shifting rods The screw-shaft H car- 7 ure, and for this purpose each is provided,

preferably, wit-h a coiled spring h, bearing against one of the guides you the frame and an adjustable collar on the rod, these springs being arranged so as to throw the shifting rods in opposite directions. The shifting rods S T are preferably adjustably connected to the levers Q R by means of set-screwsvl to take up the wear of the cones, and at their opposite ends are provided with lookingnotches 7t, by which they are held in position against the tension of springs h, as presently to be described, and with lugs Zengaged by the hand shifting lever V for the reversal or stoppage of the platen, and preferaby made adjustable on the rods S T, as shown. The

shifting lever V carries. arms m at'each side which engage the lugs Z, the lower sides of these arinsm being provided with cam-surfaces and forming cam-arms, as shown in Figs. 4 and 5.

' as will be fully explained hereinafter in conl to the frame.

nection with the operation of the machine.

For the purpose of shifting the lever V automatically, so as to stop the platen at the desired point, a bell-crank lever W is pivoted One of the arms of this lever enters between jaws p on the nut G, so as to be. actuated by the movement of the nut, and to the other arm is pivoted a bar X, sliding in the bracket Uand provided with a longitudinal slot, in which the lever V moves. At its outer end this bar X is provided with a setscrew q, entering the slot, by which the length of the slot and the time of engagement of the screw with the lever V, and consequently the time of operation of the lever by the bar X, may be adjusted, as desired.

For the purpose of overcoming the momentum of the parts and stopping the platen instantaneously when the driving-pulleys O P are disengaged from the cone N the following means are provided: Abrake-shoeriscarried by a rod .9, vertically movable in the bracket M and normally pressed into braking contact with the cone N by a spring t. The brakerod 8 is provided with a cross-bar u at its upper end, forming arms extending over the shifting rods S '1, and each of these rods carries, a cam w, which forms a trip for the brake, these cams being preferably made adjustable on the rods by means of set-screwsac, as shown. These trips are arranged so that each is drawn under one of the arms It as the rod carrying the. trip. is shifted to. throw on the drivingpulleys O P, thus raising the brake against the tension of the spring 25 and holding it out of contact with the cone N until the arm a is released bythe Withdrawal of the trip to on I the movement of the rod X in the opposite direction to throw off the driving-pulley. Thus the disengagement of the driving-pulleys applies the brake, so that an instantaneous stop is secured and the-brake is again released on the engagement of either of the driving-pulleys.

The operation of the press will be understood from a brief description. In the position of rest shown in Figs. 1 to 3 the platen is in its lowest position and both the' driving-pulleys O P out of contact with the cone N, the shiftinglever Vis in its central position with the cam-arms m, depressing both catches n, so as to release the shifting rods S T, and the brake r is applied. The type-form and mold having been placed in position, as shown in Fig. 1, the shifting lever V is thrown by the operator into the position shown in Fig. 4, shifting the rod S against the tension of the spring h by the engagement of the cam-armm on the shifting lever with the lug Z and carrying the driving-pulley 0 into contact with the cone N. As the shifting rod S is moved, the notch is brought opposite the catch n, and as the latter has been released from the camarm m by the shifting of the lever V it is and mold against the head B. This move ment of the nut also shifts the bell-crank lever WV and the sliding bar X is moved inward, carrying with it in the latter part of its movement the lever V by engagement of the setscrew q. As the platen reaches the position of highest pressure for which adjustment is made by set-screw q, the lever V is brought into the position shown in Fig. 2, and the cam-arm m depresses and releases the catch n. The rod S is then shifted inward by its spring h, throwing the pulley 0 out of engagement with cone N and at the same time moving the trip to out from under the brakearm n, releasing the brake, so that the latter is applied by the spring 25, the platen of the press being stopped instantaneously. When the platen is to be lowered for the removal of the type-form and mold, the shifting lever V is thrown by the operator into the position shown in Fig. 5, thereby shifting the rod T against the pressure of spring h and throw-' ing the driving-pulleyP. into engagement with the cone N, the brake being raised by the cam-surface on trip to on the shifting rod and the catch n engaging and locking the shifting rod T, all as previously explained in connection with the rod S, on the upward movement of the platen. As the drivingpulley P is driven in the opposite direction from the pulley O, the screw H is now driven in the opposite direction and the nut G is ITO lowered, drawing in the toggles and lowering the platen, and the bar X is moved outward, carrying with it by engagement of the inner wall of the slot the shifting lever V. As the platen reaches its lowest position, the shifting lever is again brought into its central position, (shown in Fig. 2,) thereby releasing the catch at from the shifting rod T, and the latter is returned by the spring h, throwing the-pulley P out of contact with the cone N, applying the brake, and restoring all parts to their original positions, as shown in Figs. 1 to 3.

In the construction thus far described the brake is applied to stop the platen at the limit of its movement in both directions. It is evident, however, that this is not absolutely essential, but that the use of the brake may vary to some extent with the class of press with which the shifting and brake mechanisms are employed.

In the class of presses for use in which the improvements of the present invention are especially designed, as stated above, the weight of the platen and the high pressure used will be sufficient to stop. the platen on its upward movement, so that the brake will not then be required, but will be desirable upon the downward movement, as the m0- mentum of the parts is great.

If it be desired to apply the brake at the end of the upward movement and during the entire downward movement of the platen, this may readily be done by omitting the trip to on the rod T, so that the shifting of the rod toreverse the driving mechanism for the downward movement will not trip the brake, but the latter will be applied at all times, ex-

cept during the upward movement, when it is thrown off by the trip w on the rod S.

V The brake-trip mechanism shown is a very simple construction for effecting the operation of the brake, as previously described; but it may be found desirable to apply the brake only at the limit of the downward-movement, leaving the brake off during the driving movement in both directions, and in Figs. 7 to 1i I have shown the preferred construction for attaining this result, which construction will now be described.

The construction of the brake and springpressed brake-rod is the same as previously described; but the cross-arm u is omitted,

and the brake-rod s carries in place thereof a collar 10, adjustableon the brake-rod by setscrew 1, and provided with a square-faced lug 2, extending in the line of movement of the shifting rods. A small shaft 11 is mounted in the bracket M transversely to the rods S T and carries at its opposite ends disks 12 13. The disk 12 is provided with two pins 3 4, extending over rod S, and the disk 13 with two similar pins 5 6, extending over rod T, these pins being so arranged that the pins on each disk are diametrically opposite each other, and the four pins correspond to the quadrants of revolution of the shaft 11. Shaft 11 extends beneath the square-faced lug 2 and is provided on opposite sides with squared recesses 7, into which the lug 2 is thrownby spring 25 on brake-rod s when the shaft is rotated to bring one of the-m opposite the lug, the brake-rod 8 being raised to release the brake when the lug is in contact with the full portion of the shaft. 7

For the purpose of rotating theshaft 11 through disks 12 13 for tripping and applying the brake,the shifting rod S is provided with a trip 14:, adjustable by a set-screw 8, this trip being arranged to strike one of the pins 3 at on disk 12 as the shifting rod S is moved to the left to throw the driving-pulley 0 into operation for the upward movement of the platen, but does not engage either of the pins on the return of the shifting rod. The shifting-rod T carries, also, a trip 15, adjustable by a setscrew 8, the trip being pivoted to swing in the line of movement of the rod T and springpressed by spring 9, so as to allow it to yield on engagement with the pins 5 6 as the rod moves to the right to carry the driving-pulley P into engagement with the cone N for the downward movement of the platen, but to engage one of the pins and rotate the shaft 11 through a quadrant on the return movement of the rod S.

The operation of the modified construction is as follows: WVith the platenin is lowest position out of contact with the cone Nand the brake applied the parts are in the position shown in Figs. 7 to 10, the h1g2 on the brakerod being in engagement with the squared recess 7 on shaft 11 and the trip 14 on rodS in position to engage pin 3 on disk 12 as the rod is shifted. As the rod S is shifted to throw the driving-pulley 0 into engagement with cone Nfor the upward movement of the platen, the trip 14 on the rod engages the pin 3 on the disk 12 and rotates the shaft 11 through a quarter-revolution, thus raising the brakerod 3 by engagement with ing 2 and releasing the brake. This also rotates disk 13, so as to carry pin 6 from the-position shown in Fig. 10 to that shown in Fig. 11, so that it is in position to be engaged by the trip 15, as presently to be described. The lug 2 is now upon the full portion of the shaft 11, and all the parts remain in the position shown in Fig. 11 until the rod S is shifted to throw the pulley 0 out of engagement. 'As this is done, the trip 14 is carried back into the position shown in Figs. 10 and 12; but no pin on disk 12 is engaged, and the shaft 11 is not actu-.

ated. As the rod T is shiftedto the right to throw the driving-pulley P into engagement with the cone N for the downward movement of the platen, the trip 15 is carried from the position shown in Fig. 11 to that shown in Fig. 12, the trip 15 yielding'against the pressure of spring 9, so as to pass the pin 6 without rotating the disk 13. As the platen reaches its lowest position and the rod T is shifted to the left to throw the pulley P out of engagement with cone N, the-trip 15 is carried to the left, as shown in the drawings, and v by engagement with the pin 6 rotates the disk Figs. 7 to 10, excepting that the disks 12 13 and shaft 11 have made a half-revolution.

It will be seen that my construction provides avery simple, strong, and efficient power-press for electrotyping and similar vuses where a comparatively small movement and a large pressure gradually and uniformly applied is desired, and one in which an automatic and instantaneous stopping of the platen is secured. All the movements, moreover, are

controlled by a few small parts, which are all readily adjustable, so that by slight changes of position of these parts uniformity of action throughout the machine is obtained with any desired pressure.-

While'l have shown the preferred construction embodying my invention, it will beunderstoodthat my invention is not to be limited to the exact construction shown; but it is evident that modifications may be made there- I in without'departing from my invention.

The cone pulley construction of driving mechanism is preferred; but other well-known forms of clutch driving mechanism may'be used with my shifting mechanism.

What 'I'claim is- 1. The combination, with the platen of a press and driving mechanism therefor capable of being-thrown out-of operation, of a spring-pressed shifting rod connected to said driving mechanism and moved against the spring-pressure to throw the driving mechanism into operation, a catch holding said rod in' position when shifted to throw the driving mechanism into operation, connections where by the catch isreleased when the platen has reached a certain point, and a spring-pressed brake released while the driving mechanism is in operation, said brake being controlled by the shifting rod, but mounted independently thereof, substantially as described.

2. The combination, with the platen of a press and driving mechanism therefor capable of being thrown out of operation, of a spring-pressed'shifting rod connected to said driving mechanism and moved against the spring-pressure to throw the driving mechanism into operation, a catch holding said rod in position when shifted to throw the driving mechanism into operation,connections whereby the catch is released when the platen has reached a certain point, a brake mounted independently of the shifting rod automatically applied to check the platen at the end of its movement, and a brake-trip actuated by said shifting rod to release the brake when the driving mechanism is in operation, substantially as described.

3. The combination, with the platen of a press and driving mechanism therefor capable of being reversed or thrown out of operation, of two spring-pressed shifting rods connected to said driving mechanism and moved in opposite directions against the springpressure to throw the driving mechanism into position for operating the platen in opposite directions, catches holding said rods in position when shifted to throw the driving mechanism into operation, and connections whereby the catches are released when the platen has reached a certain point in its movement in either direction, substantially asdescribed. g V

4. The combination, with the platen of a press and driving mechanism therefor capable of being reversed or thrown out of operation, of two sliding spring-pressed shifting rods connected to said driving mechanism and moved in opposite directions against the spring-pressure to throw the driving'mechanism into position for operating the platen in opposite directions, catches holding said rods in position when shifted to throw the driving mechanism into operation, and connections whereby the catches are released when the anism into operation, connections whereby the catches are released when the platen has reached a'certain point in its movement in either direction, a brake adapted to be automatically applied to check the platen at the end of its movement, and brake-trips actuated by said shifting rods to release the brake when the driving mechanism is in operation, substantially as described.

6. The combination, with the platen of a press and driving mechanism therefor capable of being reversed or thrown out of operation, of sliding spring-pressed shifting rods S T, connected to said driving mechanism and provided with notches k, spring-pressed catches n, engaging said notches to hold the rods in position when the driving mechanism is in operation, and shifting lever V, throwing said rods in opposite directions toreverse the movement of the platen-or throw the driving mechanism out of operation and releasing the catches n when shifted in either direction, substantially as described.

7. The combination, with the platen of a press and driving mechanism therefor capable of being reversed or thrown out of operation, of sliding spring-pressed shifting rods .IIO

S T, connected to said driving mechanism and provided with notches 70', spring-pressed catches n, engaging said notches to hold the rods in position when the driving mechanism is in operation, a shifting lever V, throwing said rods in opposite directions to reverse the movement of the platen or throw the driving mechanism out of operation and releasing the catches nwhen'shifted in either direction,

and connections between the platen and lever, whereby the lever is shifted to throw the driving mechanism out of operation when the platen has reached a certain point in its movement in either direction, substantially as described.

8. The combination, with the platen of a press and driving mechanism therefor capable of being reversed or thrown out of operation, of sliding spring-pressed shifting rods S T, connected to said driving mechanism and provided with notches in, spring-pressed catches n, engaging said notches to hold the rods in position when the driving mechanism is in operation, a shifting lever V, throwing said rods in opposite directions to reverse the movement of the platen or throw the driving mechanism out of operation and releasing the catches at when shifted in either direction, sliding bar X, engaging said shifting lever, and lever W, rocked during the movement of the platen and actuating said bar to shift the lever into position for throwing the driving mechanism out of operation, substantially as described.

9. The combination, with the driving and driven mechanism, of shifting rods S T, throwing the driving mechanism, out of operation or reversing the movement of the driven mechanism, a brake automatically applied to check the driven mechanism when the driving mechanism is out of operation, and trips actuated by said shifting rods and operating to release said brake when the driving mechanism is in operation, substantially as described.

10 The combination, with the driving and driven mechanism, of shifting rods S T, throwing the driving mechanism out of operation or reversing the movement of the driven mechanism, a spring-pressed brake, and brake-trips actuated by said rods and operating to release said brake during the movement of the driven mechanism in both directions and permit the application of said brake at the end of the movement in one direction, substantially as described.

11. The combination, with the driving and driven mechanism, of spring-pressed brakerod 3, carrying lug 2, shaft 11, having recesses 7, receiving lug 2 when the brake is applied, disks 12 13 on said shaft, having pins arranged as described, shifting rods for throwing the driving mechanism out of operation or reversing the movement of the driven mechanism, and trips carried by said rods and engaging said pins, whereby the brake is controlled by the movement of the shifting rods, substantially as described.

12. The combination, with the driving and driven mechanism, of spring-pressed brakerod 5, carrying lug 2, shaft 11, having recesses 7, receiving lug 2 when the brake is applied, disks 12 13 on said shaft, having pins arranged as described, shifting rods S T, moving in opposite directions and throwing the driving mechanism out of operation or reversing the movement of the driven mechanism, fixed trip 14, carried by rod S and rotating the shaft to release the brake as it is shifted to throw the driving mechanism into operation, and yielding trip 15, carried by rod T and rotating said shaft to apply the brake as it is shifted to throw the driving mechanism out of operation on the return movement of the driven mechanism, substantially as described, 7

13. The combination, with a driving mechanism capable of being reversed or thrown out of operation, ofsliding spring-pressed shifting rods S T, having notches 7c and adjustable lugs Z, spring-pressed catches n, and shifting lever V,'provided with arms m, engaging saidlugs Z to throw the shifting rods in opposite directions and having cam-surfaces engaging and releasing said catches 71., substantially as described.

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

- STEPHEN D. TUOKER.

Vitnesses:

Orro L. RAABE, F. W. H. CRANE.

Images