US892376A - Mechanical movement. - Google Patents

Description

PATENTED JUNE 30, 1908.

B. HUBER.

MECHANICAL MOVEMENT.

APPLICATION FILED SEPT.23.1904.

2 SHEETS-SHEET 1.

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UNITED STATES PeirENT OFFICE.

BERTHOLD HUBER, or TAUNTON, MASSACHUSETTS.

MECHANICAL MOVEMENT.

To. all whom it may concern:

Be it known that I, BERTHOLD Human, a citizen of the United States, residin at Taunton, in the county of Bristol and tate of Massachusetts, have invented a new and useful Mechanical Movement, of which the followin is a specification.

The 0 ,ject of this invention is to produce a new and improved mechanical movement for converting rotary into reciprocating motion.

The movement has been particularly designed for reciprocating the moving members or beds of printing presses.

Itis desirable in printing presses to have thereciprocating member or bed move with a uniform speed during the printing action, which movement is accomplished by a mechanism usually termed the main driving mechanism; and to provide a crank actuated mechanism for reversing the movement of the bed which is done by slowing down, stopping and starting the bed in the The most desirable reverse is obtained by using a half turn of a crank element such as a wrist-pin. The

common way in practice of arranging these instrumentalities has been to use what is known as the three'revolution arrangement, that is, to arrange the mechanism so that the crank element will make one revolution for the uniform movement of the bed in one direction; a half revolution for the reversal of the bed at one end of its stroke; another revolution for the uniform movement of the bed'in the opposite direction} and another half revolution for. the reversal two-revolution mechanism is provided, and

divide the time so that the uniform movement of the bed in one direction will occupy a half revolution of the crank element; the

reversal at one end of the stroke'will occupy Specification of Letters Patent.

' Continuation of application Serial No. 136,927, filed December 29, 1902. This application filed Serial No. 225,588. l

Patented June'30, 1908.

September 23, 1904.

another half revolution of the crank element;

the constant speed movement in the opposite direction will occupy a third half revo of the bed at the opposite end of its stroke will occupy a half revolution of the crank' movements as compared with the three revolution arrangement. This desirable result is obtained by making the time of uniform movement equal to the time of the reversing movement, or in other words, dividing the time of operation into four aliquot parts between the uniform speed movements and the reversing movements, a uniform speed move 'lution of the crank element; and the reversal ment, of course, occurring alternately with a reversing movement. necessary with the time relation before described is making the same half turn for both reversing movements of a complete cycle, and as the reversing movements must be in opposite directions if a single crank element is used, it is necessary to provide a direct and change motion connection between the crank element and the bed for opposite reversals, and this is a distinctive feature of my invention. Further, as the time relation before described is particularly advantageous in large printing presses, and as it is particularly desirable to make such printing presses set low, I provide in combination with the two-revolution crank element a main driving mechanism which is geared to turn faster than the crank element, whereby it may be reduced in size and the bed kept low down.

The invention further consists of certain details hereinafter particularly pointed out in the claims at the end oTthis specification.

In the accompanying two sheets of drawings, I have shown the invention as adapted to a drum-cylinder printing-press, although, of course, it may be adapted to any form of printing press inwhich a reciprocating bed is employed and any arrangement of impression cylinder or cylinders used in connection with said bed.

As the crank element In the drawings, Figure 1. is a side elevation of enough of a printing press to illustrate the operation of my invention.

Fig. 2 is a sectional elevation taken on the line 22 of Fig. 3. Fig. 3 is a sectional plan view taken on the line 33 of Fig. 2. Figs. 4 to 6 inclusive are diagrams illustrating the reversal at the forward end of the machine which I term the direct reversal, and Figs. 7 to 9 inclusive are similar diagrams illustrating the reversal at the rear end of the machine which I term the change motion reversal.

Referring to the drawings and in detail, A designates the frame work, and B the bed which is mounted to reciprocate on the frame-work in the usual way, and which carries the printing form or forms F. C designates the impression cylinder. These parts are arranged in the ordinary way, and require no further description.

Attached to the bed in different vertical planes are an upper rack 10 and a lower rack 11. These racks are alternately engaged by a driving pinion 12 which is mounted on a ,sliding shaft 13, which shaft carries a pinion said lever has a roller engaging the groove of said cam 19, and a roller at its other end engaging a grooved collar 21 on the driving shaft 13..

' The mechanism before described constitutes in substance a inain driving mechanism which is geared to turn faster than the crankgear D, and hence is reduced in size, whereby the mechanism may be arranged in small com ass vertically.

T e gear 14 is usually made one-half the size of the driving gear D, whereby'the driving gear 12 will make one complete turn for each uniform speed movement of the bed, the racks 10 and 11 being made of a length substantially equal to a pitch circumference of said driving gear 12. The driving gear .12 is ed by the car .9 so as alternately to engage said racks 10 and 11. v

A gear 22 is arranged on-the shaft of the impression cylinder 0, andis geared with the gear 17. The gear 22 on the impression cylinder is made twice the diameter of the crank gear D so that the impression cylinder will turn once for each two revolutions of the crank-gear; which is theproper speed for a drum-cylinder machine.

Mounted on the crank-gear D- is a crank element ,or wrist-pin 27 which carries a reversing rack 33.

block 26 which engages a slot 25 in a horizontally reciprocating yoke or slider E whichis arranged in guide-ways 24f and 23 outside the frame-work A. The wrist-pin 27 is set on said crank-gear D so that its radius will substantially equal the pitch diameter of the driving gear 12. Arranged on said yoke or slider E is a rack 28 which engages a p1n1on 29 mounted on a shaft 30 which carries a that the crank gear D has just made such a half revolution, or the driving gear 12 such full revolution as to have caused the bed to have made its return or retrograde uniform speed movementrelatively to the impression v cylinder. This will bring the parts to the position shown in Fig. 4 where said driving gear 12 is just running out of mesh of the lower rack 11, and where the oscillating requarter revolution of the crank element 27 the yoke or slider E will be moved to the, right at a speed commencing at the constant speed movement of the bed and gradually.

diminishing to zero.v This motion by means of rack- 28, pinion 29, shaft 30, reversin' pinion 31, and reversing ra'ck 33 will be directlyimparted to the bed at the same speed and-in the same direction. This will bring the arts to the position shown in Fig; 5. Durmgthe next uarter revolution of the crank element 27 t 'e'yoke E will be moved to the left at a speed commencing from zero and gradually accelerating up to the uniform speed movement of thebed, and this motion will be directly imparted to the bed by the connections before described. During the time of the last described half revolution of the crank-element the driving gear 12 will have been shifted axially so that it will now engage the upper rack 10. This will-bring the parts to the position shown in Fig. 6.

Thus it will be seen that the crank element, the yoke and the connections to the reversing 'versing pinion 31 is justengaging the lower Now during the next rack 33 constitute a reversing mechanism;

which will give a full crank half-turn reverse to the bed in a direct manner, orin the same direction as the yoke itself is moved. During the next half turn of the crank element the driving gear 12 will makeone revolution in mesh with the upper rack 10, 'which will impart the uniform speed motion to the bed on its forward stroke to the left as shown in the diagrams. T his will bring theparts to the position shown in Fig. 7. the next quarter revolution of the crankelement the yoke or slider E will be moved to the right at a speed commencing at Now during of the crank-element, the yoke or slowing down motion movement of the bed the uniform speed and this and gradually decreasing to zero,

-motion will be imparted to the reversing pinimparted to the bed will be in the reverse direction from that in which the reciprocating yoke E is moving, whereby, although the obtained by the crank element will be imparted to the bed it will be in an opposite direction relatively to the before described direct reverse between Figs. 4 and 5. This change motion reverse will bring the arts to the position shown in Fig. 8. Now uring the next quarter revolution 1 slider E will be moved to the left at a speed gradually accelerating from-z'ero up to the uniform movement of the bed, and by the change motion connection before described this movement will be imparted to the bed but in a reverse direction relatively to that in which the yoke is moving. Thus it will be seen that the reversing mechanism when acting through the rack 32 will constitute a changemotion reversing mechanism. By this arrangement the motion of the bed will be re versed and the two-revolution cycle will be cor i ilpleted;

e movement of the bed under the uniform speed will thus be a half circumference of the crank element, or a pitch circumference of the driving pinion, and each reversing movement will occur in a travelback and forthequalto the radius of said crank element, or a pitch diameter of the driving pinion, and the total stroke will be a half circumference of the crank element plus a diameter thereof, or a pitch circumference of the driving pinion plus two pitch circumferences thereof. In the specific illustration each alternate'partof the cycle takes one complete revolution of the driving gear. I

It will be seen that the reversing actions at each end of the bed take place as the crank element makes its ri ht-hand revolution relatively to a verticaI line, looking at the diagrams, and that the direct and change motion connections before described allow for the same movement of the crank-pin to accomplish the opposite reversals. By this arrangement, therefore, a two-revo ution driving mechanism is arranged which still kee s the ideal reversing properties of the hal -turn crank reverse. Q

I am aware that it has heretofore been proposed to use a two-revolution driving pinion for actuating the beds of printing resses as shown in-patentto Robert Miehle, I 0. 317,663,datedMay12,1885,but to do this, the use of two wristins was necessary, which in the particular mec anism shown in this patent, necessarily lead to the sacrifice of the full l1alf-turn or true crank reverse, and to the accomplishment of a reverse which only occupies thirty or forty degrees of the revolution of the crank element instead of onehundred and eighty degrees or a full halfturn which is necessary to accomplish the desirable results heretofore pointed out. In contra-distinction to this mechanism, I believe I am the first to obtain a full halfturn or true crank reverse with a two-revolution crank-element, and by so doing, I am enabled to give heavy, large printing press beds a much longer and smoother reverse than has heretofore been possible, whereby I am enabled to increase materially the speed of this class of machinery.

\Vhile the invention as shown or applied to actuate the reciprocating bed of a printing press, of course, it may be applied to other mechanisms.

The details and arrangements herein described may be greatly varied by a skilled mechanic without departing from the scope of my invention as expressed in the claims.

Having thus fully described my invention, what I. claim and desire to secure by Letters Patent is 1. In a mechanical movement, the combination of a reciprocating member, a' main driving mechanism for imparting a move ment thereto at a uniform speed, and a reversing mechanism for slowing down stopping and starting the member in the opposite direction, the time of the uniform speed movement being equal to the time of the re versing movement.

2. In a mechanical movement, the combination of a reciprocating member, a main driving mechanism for imparting forward and back movements thereto at a uniform speed, and a reversing mechanism for slowing downstopping and starting the member in the opposite direction at each end of its stroke, the time of operation being divided into four aliquot parts between the uniform speed movements and the reversing movements.

3. In a mechanical movement, the combination of a rcci rocating member, a shaft making two revo utions for each complete reciprocation thereof, a main driving mechanism for imparting movements to the member at auniform speed, and a reversing mechanism, the main driving mechanism acting alternately with the reversing mechanism, and each action taking. a half revolution of said shaft.

I 4. In a mechanical movement, the combination of a reciprocating member, a main driving mechanism for imparting the uniform s eed movements t1ereto, a sin le crank-element making two revolutions or each complete reciprocation of the member, and means for connecting said crank element herein described is ment making two revolutions for each complete reciprocation of the member, a reversing member reciprocated by said crank-element, and means for connecting said reversing member to said reciprocating member for the reversing movements thereof, saidconnections comprising a direct connection for the reversal at one end and a change motion connection for the reversal at the other end.

6. In a mechanical movement, the combination of a reciprocating member, a main driving mechanism for imparting uniform speed movements thereto, a single crank-elementmaking two revolutions for each complete reciprocation oft'he member, a reversmg, member actuated by said crank element, a gear oscillated by said reversin 'member,

and reversing racks carried by sald bed and oppositely disposed relatively to said oscillatmg gear to provide for a direct and changemotion reversal from said crank-element.

v 7. In a mechanical movement, the combination of" a reciprocating member, a main driving mechamsm for imparting uniform speed movements thereto, a crank-actuated s ider carrying a rack, a pinion engaging said I rack, a reversing gear actuated by said pinference of t ion, and two reversing racks carried by the reciprocating member, said reversing racks being arranged to engage'said reversing pinion on opposite sides of 1ts axis.

8. In a mechanical movement, the combination of a reciprocating bed, a revolving shaft making two revolutions for each complete reciprocation of the bed, a main drivin mechanism geared to turn faster than said shaft, whereby it is reduced in size, and a reversing mechanism actuated by said shaft.

9. In a mechanical movement, the combi nation'of a reciprocatin bed, a revolving shaft actuating a crank e ement and making two revolutions for each complete reciprocation of the bed, a reduced 'mechanism geared to said shaft, and direct and change-motion connections from said crank-element to said bed for accomplishing the reversals thereof.

'10. In a mechanical movement, the combination of a reciprocating member, amain 1 driving mechanism for 'givm the same its uniform .movements, a cran -actuate d reversing mechanism for giving the same its reversm -movements at each end of its travel, t e uniform.movement constituting a travel e ualto one-half the pitch circume crank, and each reversal occurring in a travel equal to the radius of the crank.

main driving 11. In a mechanical movement, the corribination of a reciprocating member, a crank-- element, a main driving mechanism having a driving pinion geared to the crank-element to make twice as many revolutions, and a reversing mechanism actuated bysaid crankelement, the arrangement being such that each uniform movement will take one complete revolution of the driving pinion, and so that each reversing movement will also occur during one complete revolution of the driving pinion.

12. In a mechanical movement, the combination of a reciprocating member, a crank- .element, a main driving mechanism having adriving pinion geared to the crank-element to make twice as many revolutions, and a reversing mechanism, whereb the member will move a circumference of the driving pinion on its uniform movements and a diameter thereof back and forth on its reversing movements.

13. In a mechanical movement, the combination of a reciprocating member, a rack and pinion driving mechanism for impartin a movement thereto at a uniform speed, an a reversing mechanism for slowing-down, stopping and startingthe member in the op posite direction; the time of the uniform speed movement being equal to the time of t e reversing movement 14. In a mechanical movement, the combination of a reciprocating member, a rack and pinion; driving mechanism for imparting a movement thereto at a uniform s eed, a

continuously rotating wrist-pin, an a 'reversing mechanism for slowingdown, stopping and starting the member in the opposite direction,- the time of the uniform speed movement being-equal to the time of the re-' 5 versln movement. r

n a printing ress, the combination of b a frame-Work, a becFmounted to. reciprocate thereon, a main driving mechanism arranged inside of theframe-work for imparting the" uniform speed movements tothe bed, a crank actuated reversing member arranged to reciprocate outside of the frame-work, and means for connecting the same to the bed for the reversing movements. 1

16. In a printing ress, the combination of a frame-Work, a befmounted to reciprocate 1 thereon, a main driving mechanism arranged inside of the frame-work for imparting the uniform speed movements to the bed, a slider arranged outside of the frame-Work, a crank for reciprocating the same, and ge ar 111g extending fromsaid slider to the inside of the frame-work for connecting the slider to the bed for the reversing movements.

17. In a mechanical movement, the combination of a frame-Work, a bed mounted to reciprocate thereon, a main driving mechan-. ism arranged inside of the frame-work for imparting the uniform speed movements to the bed, a slider mounted to reciprocate out- In testimony whereof I have hereunto set side of the framework, a crank for recipromy hand, in the presence of two subscriblng eating the slider, a rack carried by the slider, Witnesses.

a pinion engaging said rack, a shaft eXtend- BERTHOLD HUBER. vi 5 ing inside of the frame-Work, a reversing pin- W'itnesses:

ion arranged on said shaft, and reversing EDITH B. DAVIS,

raeks carried by the bed. LEONARD C. COUCH.

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