US378344A - Device for imparting combined rotary and reciprocating movement - Google Patents

Description

J.v THOMSON.

(No Model.) l

DEVICE FOR IMPARIING COMBINED ROTARY AND REOIPEOOATING MOVEMENT.

No. 378,344. Patented Feb. 21, 1888.

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L JOHN THOMSON, OF BROOKLYN, EEIV YORK, ASSIGNOR TO THE COL'S PATENT FIRE ARMS MANUFACTURING CO'IPANY, OF HAIt'iFORD,

CONNECTICUT.

DEViCE FOR IMPARTING COMBINED ROTARY AND RCIPROCATING MOVEMENT.

SPECICATIION forming part of Letters Patent No. 378,344, dated February 2l, 1838.

Serial No. 252,i5. (Xo modem To ccZZ whom, it may concern:

Be it known that I, JOHN THOMSON, acitizen of the United States, and a resident of Brook` lyn, Kings county, New York, have invented certain nenY and useful Improvements in Devices for Imparting Combined Rotary an( It ciprocating Movements, of which the following is a specification.

This invention relates to mechanical movements, and the object thereof is to impart a combined .rotary and reciprocating motion to any d eyice where such may he desirable. The

particular advantage ot' the device, however,

consists in the ahilit-y to change either the extent ot' the reciprocating action or the speed thereof with respect to the rotary motion. I regard the device as particularly applicable in the production of the irregular forms by the control Ofthr1ners, as used in lathes and inillingniachines, and also for ink-mills and dislribntiiig-cylinders ol' printing-presses.

In the drawings herewith presented, iilnsirating iny invent-ion, I have chosen to repre sent the same applied to ahollow cylindersuch, l'or instance, as might he usedin a printing-press.

Figure l ot' said drawings is a vertical longitudinal section through the cylinder, exposing the internal apparatus in elevation and section. 2 is a transverse section on the line 2, viewed in the direction of arrows. Fig. 3 is a right-hand end elevation with thestandard removed 5 and Fig. et is a detached View of a portion of cylinder, a section of which is broken away, the View being in the direction of arrow 5 oi' Figi i..

The general description and operation of the device are as foliows:

Mounted in standards, as 6 7, and free to rotate therein, is a shaft, S, on one end of which is fixedly mounted a gear-wheel, 9, which is presumed to mesh with a main or primary driving-gear, as l0. I.Vithin the cylinder A are two arms or Webs, l1 l2, in which are formed journal-bearings 13 14 for the shaft 8. The cylinder A is connected so as to have rotary movement with thc shaft and a longitudinal reciprocating movement on the shaft by anysuitahle means. Thatshown, which I have found exceedingly strong and efficient, consists in the boss l5, which is formed as a partofthe secondary gear 9, having two drivingpins, 1G I7, which are xedly mounted thereon and which project forward Within the cylinder and have free engagementwith the hearings 17 1S, formed in the arm 1l. On the opposite end of the shaft a sleeve, I9, is secured, as oy the setholt20.v upon one side of which is formed asta d, 21, and from the other side oi' which projects a counter Weight, 22. rilhere is also freely mounted upon the shaft 8 a bevelfgcar, 23, but which is fixed against rotation to the standard 7, as by the bolts 2t.

,Iounted upon the stud 2i ofthe sleeve is a bevel-gear adapted to engage the fixed gear 23. On the outer surface of the gear is formed a canrstnd or wristvpin, 2G, which carries a friction-roller, 27. 'vhen a stud is used, itis set eccentric to the axis of the gear 25, and may he adjustahiy mounted, so as to reguiate the amount ot' reciprocation of the cylinder. The said roller acts in the slot 28, formed by the lugs 29 30, Which project from the inner surface of the cylinder. Rotary motion heinginiparted to the gear 9, the result will be as follows: The driving-pins canse the cylinder to rotate with the said gear, as also the shaft, the sleeve, and bevel gea-r 25, and, as the bevelgear 23 is fixed against rotation, this causes the gear 25 to partake of rotary motion upon its own axis, as well as to he carried in a circular path with the shaft and cylinder. Strictly defined, it is an epic-yele geartrain. Such niotion of the gear 25 causes the stud or Wristpin 26 to foilow the path indicated hy dotted line 3l of Fig. et, thereby driving the cylinder hack and forth upon the shaft, as indicated by dotted lines 32, Fig. l. To change the extent of the reciprocation of the cylinder, it is simply necessary to increase or decrease the distance of the stud or Wrist-pin 2G from the center ofthe gea-r 25. To cha-nge the number of reciprocations of the cylinder to each complete rotation thereof, it is simply required to properly proportion the relation of the gears to oo tain the desired result. For instance, the ar rangement shown in the drawings gives for one complete rotation of the cylinder approximately seventy three one-hundredths of the complete throW of the crank or stud 26.

lVhere severe duty is required another stud may be formed on the sleeve in lieu of the counter-Weight, and. an additional gear with Wrist-pin and frietion-roller may be mounted thereon the duplicate of gear 25, the cylinder also having another slot diaxnetrically opposite from that shown in the drawings. In other Words, the cylinder would then be reciprocated by a pair of gears, and so arranged the action would be in its theoretically most perfect fo rm.

As a whole, the operation of the device here illustrated and described is exceedingly smooth at very fast rates of action and is simple and easy to construct.

The general arrangement and disposal of the parts here shownthat is, selfcontained Within the cylinder-are also favorable for many purposes, as no eXtra space outside is occupied by the device. When so arranged, to avoid any annoyance from the Working out of oil which may accumulate, I form the cylinder with an inwardly-projecting flange, 33, which thus acts to prevent the oil from escaping therefrom to the limit of the depth of the said iiange.

If it is desirable to discontinue the reciprocating actions at any time, it is only necessary to remove the stop-bolts 24, in consequence of which the gear 23 will be free to rotate with the shaft and cylinder, the gear 25 being thus not revolved upon its own axis.

It is evident that thc circular motion ofthe cylinder or roll might be obtained by a key or feather fixed in the shaft operating in a slot in the bearings; but the pinsare the more preferable form of construction, in that a much greater area of bearingsurfaceis obtained, and that,being farther from the center,the pressure thereon is very much less, besides which they are more convenient to lubricate and cheaper to construct.

While Ihaveshown' my invention as applied to one particular form of mechanism, it is evident that the principles thereof may be applied tormany and various forms by those skilledin the art without material change.

1. The combination, With a rotary shaft, of a cylinder mounted so as to rotate therewith and free to reciprocatelongitudinally thereon, a stationary gear, a gear carried by the shaft meshing with said stationary gear, and an eecentric connection between said gear and the cylinder, substantially as described.

2. The combination, with a rotary shaft, of a cylinder mounted so as to rotate therewith and free to reciprocate longitudinally thereon and provided with engaging-lugs, a stationary beveled gear surrounding said shaft, a beveled gear carried by the shaft meshing With the stationary gear, and a pin mounted eccentric ally on said gear, substantially as described.

8. The combination, with a revolving shaft and a cylinder freely mounted thereon, of a bosser hub, as l5, fixed on the shaft andpro vided with driving-pins, as 16 17, thereby causing the rotation ofthe cylinder, While at the same time permitting it to be reciprocated upon lthe shaft and driving-pins, substantially as described.

4. The combination, with a rotary shaft and a reciprocating cylinder mounted thereon,said cylinder being provided with engaging-lugs, of a fixed gear, a sleeve carried by the shaft and provided with a bearing-pin, and agear mounted on said bearing-pin and having an eccentric stud, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two snb scribing Witnesses.

JOI-IN THOMSON.

Vitnesses:

J. S. BARKER, F. L. FREEMAN.

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