US692679A - Mechanical movement and bed-motion for cylinder printing-machines. - Google Patents

Description

Patented Feb. 4, I902.

E. F. LEILICH. MECHANICAL MOVEMENT AND BED MOTION FOR CYLINDER PRINTING MACHINES.

7 Application filed May '7, 1901..

(No Model.)

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No. 692,679. Patented Feb. 4. I902.

E. F. I.EILICH. I MECHANICAL MOVEMENT AND BED MOTION FOR CYLINDER PRINTING MACHINES.

(Application filed May 7, 1901.I

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' Patented Feb. 4, 1902.

E. F. LEIL ICH. MECHANICAL MOVEMENT AND BED liOTION FOR GYLIND (Applicfitibn filed May '7, 1901.)

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Patented Feb'. 4, I902.

No. 692,679. I v E. F. LEILICH.

MECHANICAL MOVEMENT AND BED MOTION FOR CYLINDER PRINTING MACHINES.

(Application filed May 7, 1901.!

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EDWIN FRANCIS LErnIon, OFSALN FRANCISCO, CALIFORNIA.

MECHANICAL Mlli/EMl-INT AND BED-MOT ION FOR CYLINDER PRINTING-MACHiNES.

SPECIFICATION forming part of Letters Patent No; 692,679, dated. February 4, 1902.

' Application filed May 7, 1901. Serial No. 59,181. (No model.)

To all whom it may concern:

Beitknown that LEDWIN FRANCIS LEILICH, a citizen of-the United States, residing at San Francisco, in the county of San Francisco and State of Oalifornia,have invented certain new and useful Improvements in Mechanical I Movements and Bed-Motions for Cylinder Printing-Machines, of which the following is a specification.

My invention relates to an improved mechanical movement and bed-motion for cylinder printing-machines, the object of myinvention being to provide an apparatus of this character in which, 'so far as possible, the shock and jardue to the sudden stoppage of the printing-bed at each end 'of the stroke shall be done away with.

Cylinder printing-beds with the forms thereon are often of great weight, and the rapid stoppage of this heavy body moving with considerable velocity tends at each end of the stroke toliftthe press at the other end and to cause strain on the parts and vibration of the press. I remove this vibration and jar by causing a heavy weight to move synchronously with the printing-bed, but in the opposite direction, at the same velocity there'- With. The force or momentumtransmitted to the frame by the stoppage of the printingbed moving in the one direction is thus neutralized by the force or momentum transmitted by the stoppage ofan equal body movingin the opposite direction with'the same velocity.

Since my invention is a new mechanical movement, it will be equally applicable to other machinery besides printing-presses, in which a heavy body makes rapid reciprocations, and I desire to claimthe same in connection with all such machinery.

My invention therefore resides in the novel construction, combination, and arrangement of the parts for the above ends, hereinafter fully specified, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a plan view of a printing-bed constructed in accordance with my invention. Fig. 2 is a. side elevation of the same. Fig. 3 is a detail in cross-section of the end of the weight, showing theauxiliary weights in position. Fig. 4

is an enlarged perspective view of a portion of the press. Figs. 5, 6, and 7 are details showing the positions of the segmental gear and driving-gear relatively to the upper and lower weight-racks and upper and lower auxiliary racks when approaching the end of a stroke, when at theend of thestroke, and when beginning the next stroke, respectively. These views show the opposite side of the mechanism'to that shown in Fig. 2. Fig. Sis a crosssection of the apparatus on one side of the driving-gear. Fig. 9 is an end view of the cylinder which carries the driving-gear. Fig. 10 is a sectionof the same. Fig. 11 is a vertical section on the line A A of Fig. 8 looking in the same direction of the arrow. Fig.

12is a vertical section on the line B B of Fig.

8 looking in the same direction of the arrow, and Fig. 13 is a-broken end view of the weight.

Before describing the apparatus in detail it will assist inunderstanding the nature of the invention to first describe the same in generalterms.

, The movements which must beobtained are a generalreciprocatin'g movement of the printing-bed and a simultaneous and equal reciprocation in the opposite. direction of a weight or counterbalance of. about the same weight as the printing-bed' These movements have to be derived from thecontinuous revolution of the shaft. To accomplish this result, the motion of the printing-bed is derived from the rotation of the shaft indirectly Next, as to the derivation of the reciprocation of the weight from the continuous revolution of the driving-shaft. This is accomplished by providing upper and lower oppositely-facing racks on the weight, arranged to mesh alternately with a continuously-revolving driving gear-wheel on the stud-shaft. A cam 30 is suitably connected to the gear-wheel 31 and is used to bring the driving gear-wheelalternately into engagement with the upper and 'lower racks.

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Referring to the drawings for a more detailed description, it will be seen that 1 represents the main driving-shaft. From said shaft power is derived through a gear-wheel 2 thereon to reciprocate the printing-bed and weight, and through a pinion 3 is obtained power to operate the cam which disengages the driving-gear from one of the weight-racks and causes it to engage with the other. The gear-wheel 2 meshes with the driving gearwheel 4, which is mounted on a stud-shaft 5, placed eccentrically on the end of a cylinder 6, the latter having a pivotal bearing in the frame 7. Supposing that the wheels 2 and at are moving in the direction of the arrows and that the weight 8 is moving to the right and printing-bed 9 to the left, the driving-wheel i will then be in mesh with the upper weightrack 10 and out of mesh with the lower weightrack 11. Both of said racks are rigidly attached to said weight, which reciprocates on rollers 12 in the frame 50 of the apparatus. i Vhen the weight 8 moves to the left, the printing-bed 9 is necessarily moved with an equal velocity to the right, this simultaneous movement being due to an oscillating gearwheel 13, which is axially and loosely mounted on the cylinder 6, as shown in Fig. 8, and is operatively connected at opposite ends of a diameter with both the printing-bed 9 and the weight 8, meshing with a bed-rack 14, depending from the printing-bed, and meshing with an auxiliary rack 15, secured to the weight alongside the lower weight-rack 11. The Weight will move to the right so long as the rack 10 is in engagement with the driving gear-wheel 4:, since the latter moves continu ously. \Vhen the end of the rack 10 arrives at the driving-wheel t, so that the propelling force of the latter on the former ceases, it will then be necessary to positively arrest the movement of the weight, and therefore also of the printing-bed, instead of merely allowing it to come to rest, and it will be necessary to control said further movement, reducing the speed gradually until the weight and printing-bed come to rest and then starting them in the opposite direction and gradually accelerating their speed until they move in said opposite direction with the same velocity as before derived from the driving-wheel 4.

In order to positively control the movement of the weight while diminishing the speed to zero, there is mounted on the stud-shaft 5, side by side with the driving gear-wheel 4 and secured to said gear-wheel, a segmental gearwheel 16, which is of the form of about half an ellipse divided near the minor axis. This segmental. gear-wheel is arranged to engage alternately with two auxiliary racks 17, which are mounted on wedge-shaped blocks 18, extending upward from the lower portion of the weight and downward from the upper overhanging portion 19 thereof, so that said auxiliary racks l7 converge toward each other. They occupy positions which would be alongside of the upper and lower racks if the latter were extended beyond their ends. They are thus adapted to engage the segmental gear 16, which, as already stated, is secured at the side of the driving gear-wheel at. The segmental gear 16 is so secured to the gearwheel 4: that at the time the end of the rack 10 arrives at the driving gear-wheel 4, and therefore goes out of engagement therewith, the central point of the segmental gear 16 at the end of its major axis and farthest from the axis of revolution of said gear is vertical and comes into engagement with the advancing end of the oblique upperauxiliary rack 17. Motion is now communicated to the weight no longer from the gearwheel 4 through the rack 10, but through the medium of the segmental gear 16 and the auxiliary rack 17, and this is a constantly-diminishing motion, notwithstanding that the angular velocity of the gear-wheel 4 and segmental gear 16 is constant, because the distance from the center of rotation to the point of transmission of the motion continually diminishes, owing to the elliptical form of segmental gear and the oblique and downward direction of the upper rack 17. Provision must now be made for disengaging the segmental gear 16 from the upper auxiliary rack 17 and causing it to engage the lower auxiliary rack, so as to produce a motion of the weight in the opposite direction. This is effected by means of a camgroove 30 in the gear-wheel 31 on the studshaft 20, said wheel 31 being driven by a pinion 3 on the main driving-shaft. In said camgroove 30 rides a roller 21, carried by a link 22, having an end 23, forked to pass over the projecting end of the shaft 20 to be guided thereby, said link 22 being jointed, as at 24, to a bell crank-lever 25, pivoted at 26, and the other arm of said lever 25 being jointed, as at 27, to a link 28, the upper end of which is connected to a stud 32, eccentrically located on the end of a cylinder 6. When the roller 21 passes from the high to the low dwell of the cam-groove 30, the link 22 is moved inwardly, thereby moving the link 28 downwardly and rotating the cylinder downwardly through a small arc. The stud-shaft 5, which, as before stated, is eccentrically carried on the other end of said cylinder 6, is thus depressed, thereby depressing also the gear-wheel 4 and the segmental gear 16, both of which are mounted on said stud-shaft 5. By this movement of the roller 21 in the cam-groove 30, then, the segmental gear 16 is thrown out of engagement with the upper rack 17 and into engagement with the lower rack 17.

Rollers 34 are provided at and fixed to the end of the segmental gear 16, and these rollers engage shoes 35 at the ends of the auxiliary racks 17. The object of these rollers is to reduce friction while retaining control of the Weight and printing-bed on changing from movement in one direction of the reciprocation to the opposite and also to properly aline the parts so that on making the change the teeth of the segmental gear shall enter into mesh the teeth of the 3 lowerauxiliary rack 17. a

As shown-in Fig-. 1( the. cylinder 6 is suitably weighted on one side, as at 36, to compensate for the weight of the studs 32 and 5 and the parts carried'thereby. The'weight 8 at opposite ends carries pistons 3.7 38, and the printing-bed 9 carries at opposite ends pistons 39 40. The pistons 37 39 are in alinement with each other, and at the end of the move, merit of the weight to the left and the printing-bed to the right said pistons37 -39 enter opposite ends of a cylinder 41, fixedly secured to the frame 50, therebycompressing the airin said cylinder, which compressed air thus acts as a cushion to partly overcome the momenmay counterbalance themomentum of the printing-b'ed,includingthe forms,as nearly as tum of theweight and printin'gbed. When the weight and printing-bedmove in the other direction, the pistons 38 40' compress air in a cylinder 42 and efiect the same result.

In order that the momentum of the weight possible, there are provided auxiliary weights 49,,which-may be added to the weight as necessaryto equalize the weight of the printing- ,bed, when 'theforms are placed thereon.

The c'ounterbalancingof the momentum of the printing-bed may be accomplished by employing not only a weight of equal mass traveling in the opposite direction with equal 1 velocity, but also a weight of less mass travthem whereby they reciprocate in opposite directions with equal velocities, substantially as described.

2.: In an apparatus of .the character described, the combination of a rotating shaft, a

'longitudinallyreciprocating body, a. Wheel driven by said shaft and operatively connect- 7 ed alternately at opposite sides thereof with said body to reciprocate the same, a second longituditially-reciprocating body of substantially the same mass as thefirst, and an operative connection between them whereby theyreciprocate in opposite directions with equal velocities, substantially-as described.

3. In an. apparatus of the 'character described, the combination of a rotating shaft,

a gear-wheel thereon, a secondgear-wheel meshing with the first, a longitudinally-reciprocating'body, upper and lower racks thereon, means operated by the first-named shaft for moving the latter gear-wheel into mesh with said upper and lower racks alternately, a second longitudinally-reciprocating body, of substantially the; same massias the; first, and an operative connectionjbetweeli the two bodies whereby they reciprocate in opposite directionswith equal velocities, substantially as described. i

4. In an apparatus of the character. 'de-. scribed, the combination of a shaft, a 'continuously-driven gear-wheel thereon, alongi tudinally-reciprocating 'body, upper and lower racks thereon,'means fOILIDOVlHg Sald shaft to bring said gear-wheel into meshyvith said racks alternately, upper and lower auxiliary racks at each end of said b0dy,;p'ro vided with the shoes 35, and a segmental gear, provided with the rollers 34:, mounted on said shaft and engaging with said auxiliary racks at points near the ends of the strokes, sub,-

stantially as described.

5.In an apparatus Ofthecharacter described, the combinationof a shaft 'a con;

tinuously-driven gear-wheel thereon; a longi-, 'tudinally-reciprocating" body, upper and lower racks thereon, means for movingsaid shaft to bring said gear-wheel into meshwith said racks alternately, upper and lower auxiliary racks at each end of said body provided=with the shoes 35, said auxiliary racks being out of alinementwith the main racks,

and a segmental gear provided with the roll-f ers 34, mounted on said shaft and engaging said auxiliary racks at points near theends of the strokes, substantially as described. I

6. The combination of a printing-bed, a rack thereon, an oscillating gear-wheel meshing with said rack,a weight having airacl; with which said gear-wheel meshes on its opposite side, and means forreciprocatingsaid weight, substantiallyas described 'l I 7. The combination of a printing-bed, a

rack thereon, an oscillating gear-wheel mesh.- ing with said rack, aweight having a rack with which said gear-wheel meshes on' its opposite side, means for varying the weight to equalize itsmass with that of the printings'ubst'antially as described.

' 8. The combination of a printing-bed, a

weight, means for reciprocatingtheweight,

IIO

'bed,and means for reciprocating said weight, M

and an operative connection between. the

weight and the printing-bed whereby thelatter is moved in theopposite direction to the. former and with the same momentum, substantially as described. I

9. The combinationof a printing-bed, a weight, means for varying the mass of the weight, means for'reciprocating the weight,

and an operative connection between [the weight and the printing-bed whereby the lat-j teris moved in'the opposite direction'fto the former and with thesame momentum, sub

stantially as described.

10. The combination of a'printing-bed, a"

weight, means for reciprocatingfthe weight,

to rest, and for gradually increasing the speed at the beginning of the reciprocation, and an means for reducing the speed at'each ie'nd' of j its reciprocation gradually before bringing it &

operative connection between the weight and the printing-bed whereby the latter is moved in the opposite direction to the former and with the same momentum, substantially as described.

11. The combination of a printing-bed, a weight, means for reciprocating the weight, an operative connection between the printing bed and weight whereby the latter is moved in the opposite direction to the former and with the same momentum, and means carried by said bed and weight for reducing the shock on the stoppage of said bed and weight at the end of the stroke, substantially as described.

12. The combination of a printing-bed, a weight, means for reciprocating the weight, means for reciprocating the bed in the opposite direction to the weight and with the same momentum,and means for reducing the shock on the stoppage of said reciprocating elements at the end of their stroke, said means comprisingcylinders, and pistons arranged to entersaid cylinders at the ends of the stroke and compress the air therein, substantially as described.

13. The combination of a driving gearwheel and a segmental gear rotating together, a weight having upper and lower main racks and upper and lower oblique auxiliary racks, means operated at predetermined intervals for reciprocating the driving gear-wheel and segmental gear relatively to said upper and lower racks, whereby the gear-wheel and segmental gear are thrown out of engagement with the upper main and auxiliary racks and brought into engagement with the lower main and auxiliary racks or vice versa, a printing bed, and an oscillating wheel driven by the weight and driving the printing-bed in the opposite direction to the weight, substantially as described. 7

let. The combination of a rotating shaft, a gear-wheel mounted thereon, a driving gear- Wheel meshing with the first gear-wheel, a weight having upper and lower racks, a camwheel driven by means of the rotating shaft, a lever operated by said cam-wheel to reciprocate the shaft of the driving gear-wheel into mesh alternately with the upper and lower racks of the weight, oblique auxiliary upper and lower racks at the ends of the weight, a segmental gear reciprocated with the driving gear -wheel, and brought into mesh alternately with the upper and lower oblique auxiliary racks, rollers carried by said segmental gear and engaging shoes on said weight, a printing-bed, a rack thereon, a rack on the weight, an oscillating gear-wheel engaging both of said latter racks whereby the printing-bed and the weight move in unison in opposite directions, cylinders, and pistons carried by said weight and printing-bed and entering said cylinders in opposite directions at the ends of a stroke, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two subscribing witnesses.

EDWIN FRANCIS LEILICII. \Vitnesses:

FRANCIS M. WRIGHT, M. T. BEGLEY.

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