US414687A - Micitael -t - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1. H. W. DOPP. STEAM STAMPING PRESS.

Patented Nov. 12, 1889.

(No Model.) 7 2 Sheets-Sheet 2. H. W. DOPP. STEAM STAMPING PRESS.

No. 414,687. Patented Nov. 12, 1889.

Witnesses Inventor flttorney.

n. PEI'ERS. Momhmpher, wummw. ac.

Unirnn STATES Parent @rrrcE HENRY WM. DUPP, Oi! BUFFALO, NElV YORK; M lCllQ XEL .T. S'lARK. AND \YIL- liAM ll. DOPP EXPKUTORS OF SAID HENRY \YM. l)(')ll, IHCFEASED.

STE AM STAMPING-PRESS.

SPECIFICATION forming part of Letters Patent No. 414,687, dated November Application filed December 1, 1887. Serial No. 256,658. (No model.)

To all whom it nmy concern:

Be itknown that I, HENRY WILLIAM DoPP, of l-lnit'alo, in the county of Erie and State of New York, have invented new and useful Improvements in Steam Stamping or Pressing Machinery for Stamping or Pressing Soaps, liletal, and the Like and I do hereby declare that the following description, taken in connection with the accompanying drawings, forms a full, clear, and exact specification, which will enable others skilled in the art to which it appertains to make and use the same.

M y present invention has general reference to combined steam and foot stamping-presses; and it consists, essentially, in the novel and peculiar combination of parts and details of construction, as hereinafter first fully set forth and described, and then pointed out in the claims;

In the drawings already mentioned, which serve to illustrate my said invention more fully, Figure 1 is a perspective view of my improved combined steam and foot power press. Fig. 2 is a longitudinal sectional elevation, and 3 a front view in vertical section. Fig. & is aplan of a portion of the mechanism for actuating the knock-out. Fig. 5 is a longitudinal sectional elevation through the steam-cylinder and steam-chest in line .r of Fig. '2. Fig. (3 is a plan of the balanced piston-valve. Fig. 7 is a longitudinal sectional plan, and Fig. 8 a transverse sectional elevatiomof the said pistoirvalve. Fig. 9 is a front elevation of the steam-cylinder detached.

Like parts are designated by corresponding letters of reference in all the figures.

The object of my present invention is the production of a combined swing or pendulum foot and steam power press in such a manner that the machine can be used either asa footpress or as a steanrpower press, the steamcylinder, piston-rod, and their connections bein g so arranged and disposed th t the motion of the pendulum-lever is increased or decreased at certain intervals when the pistonrod in its operation acts by meansof an antifriction roller upon an inclined surface of the pendulum-lever so shaped and proportioned that the power of the steam is increased or diminished,as the exigencies of the case may require, to deal a blow of the desired force in relation to the steam-pressure used.

liurthermore, my invention has for its object the proi 'iding of proper means of trapping the steam and ridding it of all the water of condensation prior to its entering the steam-cylinder, so that only dry steam can be supplied to the same, the admission of such steam to the trap being governed by an automatic pressure-regulator, which, when once set, will always insure a given maximum steam-pressu re in the steam-cylinder,and thus a maximum blow of the press, no matter how much higher the initial steam-pressure may be than that to which said regulator is set.

The object of this invention is, furthermore, to so arrange the soap-ejecting device that it maybe operated intermittently, and thus enable the operator to give any desired number of blows to the article to be stamped or pressed before the ejecting device is caused to perform its predesignated functious.

To attain these results,l construct my combined foot and power stamping-press substantially as follows:

A is the frame of any suitable stamping or punching press, having a slide S,actuated. in the present instance, by a pendulum-lever A, fulcrumed at a in the head of said press. This lever has on its lower end a treadle a, byineans of which it is operated, a pendulum motion of said lever causing the slide to vertically reciprocate. Rearwardlyprojecting from this lever is a rod 12, carrying a counterpoise a, as clearly illustrated in Figs. 1 and 2.

The parts so far described are old and well known and constitute the well-known foot stamping-press for pressing soap, punching and stamping tinware, &:c., dies (not shown) being fastened to the bed 0 of the frame A", and punches fitting said dies being secured to the slide S in any desirable manner.

To operate these presses requires considerable effort and muscular labor on the part of the operator, and while power-presses having crank-shafts and fiy-wheels for actuating the slide are also well known, yet they are in many instances objectionable for numer- Y ous reasons, prominent of which is that the power has to be transmitted to the press by meansof shafting and belts, which are not always available and have to be procured at considerable expense. To operate such a press by steam-power supplied to the machine by steam-pipe, steam-hose, &c., from any suitable source of steam-supply, I provide this press with a steam-motor consisting of a steam-cylinder J, arranged underneath the bed a, and secured thereto by flanges j, Figs. 5 and 9, and suitable bolts passing through apertures in said flanges. The cylinder J is open on its upper end, and has a valve-chamber J on its lower end, said valve-chamber having a balanced regulating-valve J, as hereinafter referred to.

\Vithin the cylinder J operates a piston j of suitable constructiomsaid piston having a piston-rod B,the lower end of which is connected with said piston by a ball-and-socket joint cl, and the upper end of which is bifurcated at d to receive an anti-friction roller e, which roller bears against the pendulumlever A at c, Fig. 2, and pushes the same away from the head when the piston rises in the cylinder, as hereinafter to be more particularly pointed out. From the fork d of The piston-rod B leads a link M, Fig.' 2, to a point m on the head, near the fulcrum a of the lever A, said linkbein g pivoted tothe head at m and having on its opposite end a fork m, Fig. 5 by means of which it is pivoted to the fork or double eye d of the piston-rod, said fork m straddling the fork d,a bolt f running through the eyes and jointing the parts, as clearly indicated in Figs. 5 and 9. On the outside of the double eye m is provided a further link N, having 011 its upper end a hook A,by which the pendulum-lever A may be connected to the piston-rod and piston. The object of this rod or link N is to prevent the lever A from rebounding or vibrating when the press is being operated by the engine and the piston forced downward by the reaction of said pendulum-lever assisted by the counterpoise a. The object of the link M is to keep the upper end of the piston-rod carrying the anti-friction roller 0 in position, it acting as a guide, as it were, for said piston-rod. A spring m, Fig. 2, secures the said link with one end, and resting upon the upper end of the cylinder J (see Fig. 2) tends to take up backlash in the parts.

The piston in the cylinder J is actuated by a balanced piston-valve J within the valvechamber J. This piston valve has two grooves 1 2, the latter admitting steam through the pipe P, past the valve-stem 3,into the cyl inder whenever said groove 2 is brought opposite the inlet-port 4 in the cylinder J, while the groove 1 allows of the escape of the exhaust from the said cylinder when opposite said port 4, this latter position of the Valve being in all cases its normal one unless changed by means of the actuating-treadle K, Figs.

1, 2, and 3, which treadle is connected with one arm of a bell-crank k, by a rod is, the

other arm being connected with the valverod of the valve J by a link 70'. The bell-crank has a projecting lug f, Figs. 3 and 5, bearing against a setscrew f, passing through the bed 0 of the press-head and having on its upper end a spring-lever F, which by means of a point 0 engages indentations arranged concentricallyaround said set-screw f in the top surface of the bed 0, the object of making the lever elastic (spring) being to enable the point t to disengage the indentations, while the object of this adj usting-screw F is to form avariable stop for the bell-crank, and through it to throttle the exhaust, so that the lever A will return to its normal position with greater or less speed, according to the greater or less exhaustopening afforded by the piston-valve J and the resistance offered to the exhausting steam, a spring Q, Fig. 5, returning the parts to their normal position as soon as the'treadle K is released.

In presses used for stamping within or between male and female dies there is usually required what is called a knock-out to lift the work or article stainped out of the lower or female die, such being especially the case in presses used for stamping cakes or bars of soap. The knock-out in my present device consists of one or more vertically-reciprocating rods G G, passing through the bed 0 of the press, said rod G being the principal member and having a slotted aperture within which operates the head 6, Fig. 2, of an actuating-lever D, Fig. 4.. Below this slotted aperture is a yoke H, held to the rod G by a set-screw h, and having on its ends the rods G G, securely aflixed in any desirable manner. The lever D is loosely fitted to a shaft 9, Fig. 4, suitably journaled in bearings d and movably connected with a further lever D, also loosely arranged upon said shaft g by a clutch mechanism 61', in such a manner that by depressing the lever K the said levers D D are disconnected, while a spiral spring g forces the levers into connection when the said treadle is released. To the pendulum-lever A is pivoted a bell-crank device C, Fig.2, at B, one member of which is slotted at a" and provided with a handlescrew R. The under surface of the member Cis an inclined onethat is to say, when the pendulum-lever A returns from a stroke the under surface of said bell-crank C first reaches the extreme end of the lever D at or near the point of attachment R, and as the movement of the pendulum-lever continues the member 0 will move a greater orless distance over the end of said leverD, and, owing to its inclination, force the same downward, the degree of motion being governed bytheinclination of the said member 0, and the latter may be changed by turning the handscrew R and moving the member 0 up or down, as the case may be, a spiral spring q keeping the lever D in contact with the incline C, and a roller 7", journaled in a fork on the end of said lever D, serving to reduce friction of the moving parts. It will now be observed that the verticallyreciprocating motion of the extreme end of the lever D causes a corresponding motion of the extreme end of the lever I), and with it of. the lifting or knock-out rods G G G. If it is desired to operate but one of these rods, then the setscrew it in the yoke H is loosened, which dirconuects said yoke II, and with it the two rods G l.

The slide S of the press has two laterallyprojecting lugs s s, which are provided with pendent rods G. These rods serve as sup ports for long male dies, especially soap-dies, to prevent them from' bending under pressure. The rods are vertically adjustable by means of nuts tton top and bottom of the said lugs.

K is a foot-board pivoted to a rod u and provided with supporting-legs r. Its purpose is to serve as a rest for the feet of. the operaior when actuating the treadles K and K, and it may be swung upward and rearward out of the way of the operator whenever itis desired to use the press as a foot-press by means of the treadle ct.

The forward side of the pendulum-leverA is straight from near the head X down to and beyond the point of contact with the anti-friction rollereof the piston-rod B when in its normal position, the center line of the cylinder J forming an obtuse angle to said forward side, as can be seen by an inspection of Fig. 2. It

i will therefore be observed that as the piston of the cylinder J moves outward and the pendulum-lever A backward the point of contact 6 of the friction-roller e shifts upward, and therefore decreases the long arm of alever (of which the portion from said fulcrum to the said head X forms the short arm) and thereby increases the speed and momentum of said lever. .This is a desirable feature in presses, resulting in saving of steam and a more uniform and maximum blow of the machine.

The steam used in the steam-cylinder first enters a pressure regulator or reducer E through the pipe y, Figs. 4 and 5. This pressure-regulator consists, essentially, of a cylindrical shell having a double piston of different area, connected so that both may act simultaneously. Steam enters the shell between the two pistons at the nipple 10, Figs. 1 and 5, and forces the larger one outward, thereby tending to close the said passage for the steam. teracted by a spring acting upon the piston, which spring may be tensioned by turning a hand-wheel affixed to the screw-spindle, as clearly shown in Fig. 5. The initial steampressure may therefore be reduced to any lower pressure by simply turning the handwheel 5, as described, and will then remain constant as long as the tension of the spring is not changed.

After leaving the pressure- This action of said piston is coun-- regulator the steam passes to a trap l, where it leaves its water of condensation and passes to the steam-cylinder J through the valvechamber J. The pressure-regulator is old, it having been used by me for several years in connection with other devices, and the trap is covered by Letters Patent No. 287,424, granted to me on the 30th day of October, i883, to

which patent 1 refer for a detailed descrip tion of the construction and operation of the same.

To operate the press, disconnect the pistonrod B from pendulum-lever A by throwing back the link N with the hook A. Turn up the foot-rest K and secure it in an upright position by means of a hook or other suitable device, (not shown,) and set the die to be operated the same as in any other press. If such die happens to be a soap-dic for small cakes, remove supporting-rods G G from the projecting lugs of the slide of the press and release the yoke It by turning the set-scre\\-' 7L so that the lifting-pin G" only will be in operation. If it should be a die, say, ten inches or longer, then use the three liftingpins G G G and both supporting-rods G G, bringing them firmly down upon the dieblock and securing them to the lugs of the slide bythe lock-n uts. Now adjust the knockout by unclamping inclined arm (I and setting it so that it will lift the lower die-block just flush with the top of mold-box when the pendulum-lever A is in its normal position of rest. Having thus properly set the die, proceed to operate the press the same as an ordinary foot-press. To change the machine to a steam-press, turn down footrest1(, connect link N to pendulum-lever A, and open a valve placed in the steam-pipe near the press. (Not shown.) If, now,the treadle K be quickly depressed andreleased, steam Will be admitted to the cylin der through the valve-chamber and force the piston outward to deliver ablow of the press,wheu the pendulum-lever will immediately return to its normal position by gravitation. If the blow delivered is not of the proper strength, adjust pressure-regulator E by its hand-wheel till the desired result is secured. A different adjustment will be necessary for different classes of work; but when once set the press will give the same maximum blow, no matter how high the initial or boiler pressure may be, provided only it 'is high enough to give a blow of the desired power. Should the pendulum-lever A comeback with too much or not enough speed, adjust by lever F till the desired result is reached. By shifting the Weight a the force with which the lever comes back may also be regulated.

If it is desired to give the article to be stamped several blows without lifting it out of the die, operate treadle I which will disconnect the ejecting device until the IOC Having thus fully described my invention, I claim as new and desire to secure to me by Letters Patent of the United States 1. In steam stamping-presses, the combination of a frame, a pendulumlever the slide operated thereby, a steam motor operating said pendulum, and means whereby the steam may be admitted to said motor independently of the motor mechanism, as set forth.

2. In steam stamping-presses, the combination of a frame, a pendulum-lever, the diecarrying slide operated thereby, a steam-motor operating said lever in one direction only, and means whereby the steam maybe admitted to said motorindependently of the motor mechanism, as set forth.

3. The combination, in steam stampingpresses, of a frame, a pendulum-lever, the diecarrying slide operated thereby, a steam-motor operating the pendulum in one direction only, and means, as described, whereby the steam may be cut off and the pendulum allowed to return to its normal position by gravity, as set forth.

4:. In stamping-presses, the combination, with a frame and slide, of a lever actuating said slide, a steam-motor operating said lever in one direction only, and a valve operated by mechanism and a treadle entirely independent of the press and motor mechanism, as set forth.

5. In stampingpresses, the combination, with a frame, of a slide, mechanism foroperating the same, a knock-out mechanism, and means, substantially as described, for engaging and disengaging the said knock-out mechanism with the mechanism operating said slide, as set forth.

6. In stampingpresses, the combination, with the pendulum-lever A, of the cylinder J, piston j, swiveled piston-rod B, and link N to detachably connect said piston with the pendulum-lever, as set forth.

7. In stampingpresses, the combination, with the pendulum-lever A, fulcrum ed in the press-frame, of the steam-motor, the valvechainber having the valve actuated by the treadle, rod, and bell-crank connected thercwith, as set forth.

8. In stamping-presses, the combination, with the frame, of the lever and slide, the steam-motor, the steam-admission valve, and mechanism for actuating said valve, consisting of a treadle, rod, and bell-crank, and adjustable stop to limit the back mot on of'the steamadmission valve, as set forth.

9. In stamping-presses, the combination, with the valve J", of the bell-crank 70, having the lug f, the treadle having the rod K, and the adj ustablc stop F, as stated.

10. The combination of the cylinder J,p1s ton j, piston-rod B, having yoke cl, frictionroller 6, pendulum-lever A, and the link N, as set forth.

11. The combination, with the cylinder J, of the pistonj, pistonrod B, and the link M, pivoted to said rod at one end and to the frame at the other end, as set forth.

12. The combination, With the cylinder J, of the piston-rod B, roller e, link M, pivoted to said rod with one end and the frame with its other end, and the link N, hooked to the pendulum-lever A, as setforth.

13. The combination, with the pendulumlever, of the adjustable inclined guide thereon, the knock-out bar or bars, and the lever actuated by said adjustable guide, as set forth.

14:. The combination, with the pendulumlever, of the adjustable inclined guide there on, the knock-out bars, and the jointed levers actuated by said inclined guide, as set forth.

15. The combination, with the inclined guide on the pendulum-lever, of the jointed levers operating the knock-out bars, and mecl anism, substantially as described, for engaging and disengaging the jointed levers, as set forth.

16. The combination, with the lever A, having the adjustable inclined guide, of the levers D D, secured together by clutch mechanism, as stated, consisting of the forked bell-crank engaging the lever 1], rod 12, and treadle K", as set forth.

17. The combination, with the levers D and D, of the clutch d, as described, said lever D being movably aflixed to the shaft g, and caused to slide into and out of contact With the lever D by the treadle, rod, and forked bell-crank, as set forth.

In testimony that I claim the foregoing as my invention I have hereto set my hand in presence of two subscribing witnesses.

I-I. WM. DOPP. Attest:

C. BAER, CONRAD L. BAER.

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