US749664A - Ho model - Google Patents

Description

No. 749,664. PATENTND JAN. l12, 1904; E. I.. N. DENIS.

KINETIC 'ENERGY MACHINE.

APPLICATION FILED 00T. 9. 1902.

3 SHEETS-SHEET 1.

N0 MODEL.

E 410.749,664. PATBNTED 3441.12, 1904.

E. L. N. DENIS.

KINETIG ENERGY MACHINE.

I APPLIOATIO FLED 00T. 9, 1902.

3 SHEETS-SHEET 2` N0 MODEL.

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No. 749,664!Y v PATENTED-J'AN .512, 1904:t .E. L. N. DENIS. KINETIU ENERGY MACHINE.

APPL IOA.TI 0N FILED 00T.,9, 1902.

s SHEETS-sum1? a.

NO MODEL.

No. l749,664.

Patented amiary i2, 1904.

PATENT GEEICE.

EMILE LOUIS NICOLAS DENIS, OF PARIS, FRANCE.

,KlNETlCr-ENERGY MACHINE.

SPECIFICATION forming part of Letters Patent No. 749,664, dated January 12, 1904.

` Application ined october 9,1902.

To all whom, it may concern:

Be it known that I, EMILE LoUrs NICOLAS Dnvisivil engineer,of 135 Boulevard Mnilmontant, in the city of Paris, Republic of France, have invented a Kinetic-Energy Machine, of which the following is a full, clear, and exact description.

The invention forming the object of the present application for a patent is relative to a system of mechanism acting on the principle of m's nica, the movement of which is desmodromcal, and which is applicable to punches, scales, cutters, hammers, and other similar machines.

My invention consists of a mechanism of transmission between a heavy body and a gearing-shaft having a rotatory and uniform motion.

In order to make my idea clear, I have represented in the accompanying drawings the mechanism forming the object of my invention.

In the drawings, Figure l is a vertical section of my mechanism. Figs. 2 to 6 show front views of the slot and roller of the crankpin in their principal positions. Fig. 7 shows a modification of the slot shown in Figs. Qto 6. Fig. 8 is a vertical section of a modification of my mechanism. Fig. 9 shows an arrangement having for object the accumulation of greater power in the guide without augmenting unduly its stroke or its Weight. Fig. lO is also a modification of Fig. 8, in which the screw is governed by the crank by means of a piece whose slot is curved. Fig. 1l shows a front view of the said curved slot. Fig. 12 is an elevation of a hammer having an alternating circular motion.

In all the iguresthe same letters of reference indicate the same parts.

As may be seen by reference to Figs. 1 to 8, the principle of my mechanism consists of a heavy guide or sliding block a, moving in a frame b of a light block c, sliding with friction on the block a (or connected with the latter by the arrangement shown in Fig. 8, as will be described farther on) of a shaft d, running in the frame and bearing a crank on which turns the roller e, engaged in a peculiarly-shaped slot f, formed in the block c.

Serial No. 126,436. (No model.)

The object of this mechanism is to impart to the block an alternating reciprocating movement during three-fourths of the turn of the crank comprising the ascension of the blocks a and from the lower position to the highest part of the stroke and the descent to halfthe stroke and then during the last quarter of the turn the descent of the blocks with a uniform speed equal to the circumferential speed of the crank-pin during the last half-stroke and then a sudden stoppage and immobility of the blocks during the time the crank-pin takes to accomplish its last quarter of a turn.

By reference to Figs. 2 to 6, which show the face of the slot and the roller of the crankpin in the principal positions, it will `be seen that the slot is straight from 1/ to on its upper and lower part and from y to a on the lower part only. Fron u to e the slot has on its upper part the form of a cycloid and from .e to g/ it has the form of a circle. By

this means from c, Fig. 2, to e3, Fig. 5, a normal movement is obtained passing through the positions c', Fig. 3, ee, Fig. 4. From e3, Fig. 5, to 6*, Fig. 6, the block descends at a uniform speed. It is at this moment that the impact takes place. From e4, Fig. 6, to e, Fig. 2, the block is stopped, `because the roller enters on a circular part .e y, which is concentric with the shaft. At the position e the regular movement recommences.

In order to avoid the effect of impact, the block c is made very light and is attached to the principal tool af, first, by a friction arrangement, as shown in Fig. l, the cover g being tightened by springs; second, by a slot la, introduced by the spring c' into a notch made in the block a, as shown in Fig. 8. This bolt gives way as soon as the sliding movement between a and c becomes sufriciently pronounced.

Abutments j, placed above and below, limit the stroke of a and c and prevent the bolt from coming completely out of its notch. By means of one or other of those contrivances a certain amount of mobility exists between a and c, so that a only strikes the blow and does not transmit to the other pieces the very considerable effects produced by the impact. To this end the friction produced between a and c is regu- IOO lated in such a manner that a slip takes place as soon as the leading movement exercised by a on c becomes greater than the normal accelerating effects produced by the reciprocating motion of the block. In this case the bolt /b is thrown out of gear. The rst arrangement is preferable for hammers and tools used for various purposes. The slipping action produces a kind of automatic regulation between L and c. The second arrangement is better adapted to repeating and automatic machines. The two pieces a and c always reassume their respective positions after the blow. One of the great advantages of this arrangement is that very little strain is produced on the different parts of the mechanism compared .with the force produced by the impact.

Fig. 7 is a modification of the slot shown in Figs. 2 to 6. In this case the groove in place of being straight is curved. Its general motion during the three-fourths of a turn would be that of a crank of determined length and equal to the radius thereof, while the arrangement shown in Fig. 2 is that of a connnectinglink of unlimited length. This modified form may be applied in certain cases. The modified part can be arranged either above or underneath, so giving two different combinations.

In order to accumulate more force in the block without unduly increasing either its stroke or its weight, it will be well to adopt the arrangement shown in Fig. 9, where the block ce in its vertical movement causes the fly-wheel c to turn, the which iiy-wheel is mounted on the screw l, which enters the nut m in the block. At the moment of the impact this screw bears on the abutment n and presses with great force on the block.

In the modification shown in Fig. 10 the screw is operated by the crank through the piece 0. This piece is mounted with a springbolt on the smooth part p of the screw. The roller eenters acurved slot f and thus communicates to the piece o an alternate circular movement. This slot (shown in detail in Fig. 11) is on the same principle as that represented in Fig. l.

Fig. l2 shows a hammer having an alternating circular movement. The hammer r receives its motion from the piece s, in which is seen the characteristic slot. This mechanism is what is known as angular-slot mechanlsm.

It is of course understood that the forms, dimensions, details, and materials employed in the construction of my mechanism may vary without changing in any way the principle of my invention.

I claim- K l. In a machine of the character described, a reciprocating tool, a block having frictional sliding connection with the tool, the said block being provided with a slot, and a crank having its pin engaged in said slot.

2.. In a kinetic-energy machine, a reciprocating striking-weight having friction connection, a link forming a portion of-said friction connection, the said link being of such form that the pin of a crank rotating at a suitable and continuous rapidity transmits, during three-fourths of a revolution to said link and to the weight that it drags, the regular link movement, and immediately allows them to freely make the other half-rectilinear movement during the last quarter of the turn of the crank.

The foregoing specification of my Desmodromical system of mechanism acting on the principle of @is /vz'ea applicable to punches, scales, cutters, hammers, and other similar machine-tools signed by me this 22d day of September, 1902.

EllIIIiE LOUIS NICOLAS DENIS.

Witnesses:

EDWARD P. MACLEAN, MAURICE H. PIGNET.

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