US1693415A - Mechanical movement - Google Patents

Description

Nov. 27, 1928.

BL F. UPHAM MECHANI CAL MOVEMENT Original FledDec. 14, 1925 5 Sheets-Sheet INVENTOR @Mx www NNWMNI Nov. 27, 1928.

B. F. UPHAM MECHANICAL MOVEMENT Original Filed Dec. 14, 1925 5 Sheets-Sheet Nov. 27, 1928. f 1,693,415'

\ B. F. UPHAM MECHANICAL MOVEMENT original Filed Dec. 14, 1925 5 Sheets-Sheet 4 E Hill w' l Cntr Nov.27,19zs. A 1,693,415

B. F. UPHAM MECHANICAL MOVEMENT originalriled Dec. 14, 1925 5 sheets-sheet 5 Patented Nov. 27, 1928.

UNITED STAT-ES PATENT OFFICE.

BBT F. UPHAM, F BROOKLINE, MASSACHUSETTS, VASSIGNOR TO MILLER SAW- TRIMMER COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

MECHANICAL MOVEMENT.

Application filed December 14, 1925, Serial No. 75.160. Renewed June 9,` 1928.

My invention pertains to mechanical movements, and relates especially to mechanism for imparting a reciprocating motion to a relatively heavy body, such as the bed of a printing press, in such manner as to provide an easy slowing down, stopping and starting in a reverse direction.

The mechanical movement according to my present invention is of the same broad type those described in Patent No. 1,094,405 granted to me April 21, 1914, and Patent No. 1,393,817 granted November 29, 1921, rto Frank R. Belluche and myself. It is an object of my invention to improve upon the movements disclosed by the said prior patents, and particularly upon the movement disclosed by the said Patent No. 1,398,817, in such manuel' as to enable a more compact inachiA e to be obtained by reducing the proportieA rte size ot the reciprocating body, to facilitate and cheapen manufacture and minimize upkeep, and to increase the possibility oi speed by reducine the proportionate weight oi' the reciprocating body. Other objects of my invention will appear from the foloiving specification taken in connection with the claims annexed thereto.

I7 have described, by way of example, in iii wing specification, and shown in the aecon panying' drawings, one form of'mechanicai movement in which my invention may be embodied, the. same being applied to a printing press a means for reciprocating the bed of the latter. It is to be understood, however, that my invention may be embodied other tori-ns, and that changes may be made in the form described and shown, without exceeding the scope thereof, as defined i1 the appended claims.

ii he drawings:

Fig. 1 is a partial side elevation of a bed and cylinder printing press embodying my seni invention as a means 'for effecting the reciprocation of the type-bed, the latter being shown in one of its extreme end positions;

2 is a sectional end view, the section taken on the line 2 2 of Fig. 1;

3 is a sectional elevation, taken .on the line 3 9 oit' Fi 2, looking in the direction oit the arrows, the parts, however, being fhown in the position in whichrthe type-bed hasy just .concluded its uniform movement towards the right and is just about to be slowed down prior to reversal;

Fig. 4 is a section on the line 4-4 of Fig. 3, looking in the direction of the arrows;

F ig. 5 is a perspective view of one of the wrist pins;

Fig. 6 is a detail section taken on the line 5-5 of Fig. 3;

Fig. 7 is a section on the line 7-7 of Fig. G, looking towards the right;

Fig. 8 is a similar section but looking towards the left; Y

Figs. 9 and 10 are diagrams illustrating the principle of operation of the movement in etl'ecting stoppage, reverse and restarting, and

11 is a diagram illustrating the manner of operation of the guard heads with Vwhich the wristl pins are provided.

The press comprises a pair of main side `trames and l1 carrying between them sub-frames 12 and 13. At the upper edges of Vthe latter are formed tracks for the re` ception of rolls 14, yand upon these latter the bed 15 runs in the well known manner. To .the underside of the bed are secured a `pair ot racks 16 aA d 17, one on each side of the ongitudinal center line of the bed. One of these racks is utilized in effecting the uniform movement of the bed in one direction, the other beingV utilized for effecting such uniform movement in the opposite direction. The non-uniform movements of the bed, in stopping, reversing and starting in .the opposite direction, are effected by reversing rolls mounted on wrist pins carried by reve ng wheels, such wrist pins engaging reve ng shoes formed upon. a han 'er 18 centrally disposed with respect to t e bed and extending downwardly from the latter.

A main drive shaft 19 (Figs. 1 and 2) is mounted in suitable bearings carried by the .sub-trames 12 and 13 and has secured thereto a pinion 20 which meshes witha gear 21 secured to a shaft 22. The latter is mounted in a large bearing 23 carried by the subframe 12 andextends outward through the side frame .10, having secured thereto, at its outer end, a large gear 24. The latter meshes vwith the gear 25 of the impression cylinder 2G. The gears 24 and are of the vthe frame 10, is a pinion 36 which en lbythe lower end of a cam lever 41.

left-hand, bed-driving l groove'40 of the cam 39 1s such that the cam same diameter, so that the cylinder rotates uniformly with the gear 21. Y

A stub shaft 2'? (Figs. 1 to 4) is mounted in a bearing of the sub-frame 12 and carries the right-hand reversing Wheel 23, which is a gear Wheel of the same diameter as, and meshing with, the geur 2l. The Wheel 28 is termed theright-hand reversing Wheel because it carries a wrist pin and reversing roll, and effects the slowing` down, reversing and restarting of the bed at the rightehand end of the travel of the latter.

Mounted on a stub 'shaft 29 carried by a bearing of the sub-frame 12, and longitudinally movable on such shaft, is the leftehand bed-driving pinion 30 so called because it effects the uniform movement of thetype hed in the left-hand direction. This pinion 3() meshes continuously with theteethof the reversing Wheel 23, but, by longituiilinal movement on its shaft 29, it can be moved into and out of operative relation with the bed rack 16. o

The left-h and reversing wheel 31 is carried by a stub Vshaft 32 of the sub-frame 13 and isa gearwheelof the same diameter as the right hand reversing Wheel 23 and gear 21. lt is driven by a pinion 33on the main drive shaft 19, this pinion being of the same diameter as the pinion 20 `Which drives the gear 21. `lVith the teeth of the Wheel 31 meshes the right-hand bed-driving pinion 34, which is mounted on a stub shaft 35 carried by a bearing of the sub-frame 13.

This pinion is longitudinally movable upon a shaft, into and out of operative relation With the bed rack 17.

The bed racks 16 and 17 are of a length equal to onehalf the pitch circumferences of the reversing Wheels 28, 31; and, from this and the preceding,description of the gearing, it will be understood that the press now being .described is of thetivo revolution type, having what is known as the tivo to one bed motion. Y

Secured to the shaft 22, on the outside of O'ages with av gear 37 carried by the cam shaft 33.

`The gear 37 is twice the diameter of the pinion; so that the cam shaft makes one revolution for each cycle of the press. Upon the shaft 33 is secured a cam39 having a groove 40 in which engages a roller carried The cam lever 41 is pivoted to the sub-frame 13 (Figs 3 and 4) and has pivoted thereto, at its upper end, a block which engages in a channel 42'formed in thel hub of the righthand `bed-driving pinion 34. Pivoted to the sub-frame 12, and connected to the lower end of the cam lever 41 by a link 43, is a second cam lever 44 having pivote'd to its upper end al block which engages a channel 45 of the pinion 39. The

levers 41, 44, vwill be Vmoved transversely to the right (Fig. 4) during one quarter, held stationary during the next quarter, moved to the left during theneXt quarter, and held stationary during the last quarter, of the cycle.

In the positionof the parts shown in `Figs. 3 and 4, the cam 39 has held the right-hand bed-driving pinion 34 in engagement' with the bed rack 17 fora quarter cycle of the press, Which is one half revolution of the left-hand reversing wheel 3l, and has held the left-hand bed-drivingpinion 30 out of engagement with the bed rack 16 during this period. Thus the bed has just been given a uniform movement equal to one half the pitch circumference of the reversing Wheel. At thispoint the rack 17 leaves the pinion 34 lengthwise. During the next quarter cycle, 'during which the racks 16 and 17 are out of engagement with the pinions 30 and 34 and the reversingoperation it taking place, the cam 39 Will shift the pinions 30 and 34'to the left, thus moving the pinion 34 out of the pathof the rack 17. and bringing the pinion 30 intoV the pathof the rack 16 so as to be ready to impart the uniform movementV to the bed after the reverse has been completed.

Each of the reversing Wheels carries a Wrist pin on which is mounted reversing roll for engaging theshoes Carried by the hanger 13 of the bed. Taking the righthand reversing vvheel 28,-one of its spokes is enlarged so as to form a bearing in which is keyedthe shan t 46 of a Wrist pin 47, the latter being held in place in the bearing bv a nut '43 (Figs. and G). Upon the Wrist` pin is revolubly mounted a reversing roll 49, the latter being held in place by a guard head 50 on the Wrist pin.. which head confines the roll between itself and the face of the bearing 51. The guard head 50 is of segment shape, having an arc-shaped face 58 and a iiat face 59, the segment being .less than one half of a circle Which is of the same diameter as the roll 49. The left-l nd reversing Wheel is provided with a similarly arranged Wrist pin having a similar segment shaped guard head 59a and carrying a reversing roll 49a. The reversing rolls cooperate With reversing` shoes which are set at an angle of 450 to the plane of meremust be located Within the .pitch line of the reversing Wheels. The manner of c termining the radial distance of the Wrist pins from the aries of the reversing` Wheels ment of the bed; that the Wrist pins 'liv combined widths of the reversing roll i9 and guard head 50. Secured to the face of the Harige 54`is an effective shoe 53 of a Width only equal to that oit theV roll 49; so that the shoe will be engaged by the reversing roll 49, but will not be engaged by the guard head 50. The hanger 1S is also formed with a second flange 5l parallel with the' flange 52, the 4said flange being ,of a depth equal to that of the flange 52 for a short distance at thetop end, but being narrow for the remainder of its length. To the flange 54 is secured a guard shoe, at the top end of which is a portion 55 of a width equal to the combined widths of the reversing roll 49 and guard head 50N, the remaining part 56 of the guard shoe being of a width only equal to that oi the guard head 50. rl`hus the eiective shoe 53 can never be engaged by the guard head 50, while the narrow lower part 5G of the guard shoe can never be engaged by the reversing roll a9. The effective slice 53 and the guard shoe are spaced apart by a. distan e equal tothe diameter of the reversing roll i9, and form between them what may be termed the rightliand reversing channel 57. At its righthand end, and on its rear face, the hanger 1S is formed with flanges and provided with shoesv similar to those abovedescribed, such shoes forming between themv what may be termed the left-hand reversing channel 57a.

Referring now to Fig. 3, this re shows the par s just asthe bed rack 17 leaving the right-hand bed-driving pinion Sil. At this time the effective shoe 53 will have arrived in contact with the reversing roll Z19, which latter will be just entering upward between such shoe and the upper portion oi the guard shoe. supposing the press to be operating at speed, the momentum of the bed, which has just finished its uniform movement towards theright, will crowd the effective shoe 53 against the reversing roll Lt9. As the reversing roll moves from the point a. to the point (Fig. 9), the bed will ie gradually retarded by the reversing roll, and finally stopped when the point b is reached. During this time the reversing roll travels upward and then downi'ard in the channel 57 between the effective shoe 53 and the upper portion 55 of the guard shoe. As the reversing roll passes from the point o to the point c, it will operate upon the effective shoe 53 to force the bed to the left, until., when the point c is reached, the correct face speedtor the unizporm movement of the bed will have been a'tno such momentum as would complete its lmovement after the rack has left the bed- .completion of the movement of the bed.

It will be noted that the vconstru.L'tion of my present invention differs from'the two to one bed motion of the said Upham and Belluche Patent No. 1,398,817, among other things, in that each reversing shoe is disposed on the side of the center of the bed opposite to that at which the reversing operation takes place; whereas, in the said Upham and Belluche patent, each reversing shoe is disposed on the same side .of the center of the bed as that at which the reversing operation takes place. That is to say, in the present construit-ion the effective shoe which operatesv during the reverse at the right-hand end of the bed travel, is placed at the left-hand side of the center of the bed; Whereas, in the construction of said Upham and Belluche patent the effective shoe 3, which operates during the reverse at the right-hand end of the bed travel, is placed at the right-hand side of the center of the bed.

The construrtion according to the present invention has several advantages, one of which is that, whilst a complete holding down actionisretained, the length off-the bed can be reduced to a minimum. Inthe construction shown, the length of the bed is but very slightly greater than the amount ot' the uniform bed travel. The reason for this will be apparent from the diagrams, Figs. 9 and l0. In Fig. 9 the parts are shown in full lines in the position they `assume just as its bed rack leaves lthe right-hand beddriving pinion, the effective shoe 53 having just arrived in contact with the reversing roll 49. The retarding effect of the reversing roll will reacton the bed along a line (l normal to the shoe 53. As will be seen, this line intersects the line of travel of the bed intermediate the ends of the bed. In dotted lines in the same figure the parts are shown in a. position ythey assume just before the reverse takes place; and it will be seen that the line c of reaction of the retarding force, still intersects the line of the bed travel intermediate the ends of the bed. The parts are shown in full lines in Fig. 10 in the position theyfassume when Vthe bed is being started again shortly after the reverse. The reversing roll 49, operating to start the bed, will exercise a force which will react on the bed along the line f,nor mal to the shoe 53. In dotted lines in the same figure, vthe parts are shownin the position they assume when the reverse has been completed and the left-hand bed-driving pinion is just engaging its bed rack, the driving force of the reversing roll reacting on the bed along the line g. It will be Seen bed, and reduction of the looi' arca required T am enabled to obtain this advantage' pa ularly :n a two to one di?ercntiatedV om a three to' one bod inotion -b the construction oef-.ring ein- 5 1 'J J ployed, and especially by toe arrangement iiiwhich the ,'.fevei'sing shoes open in opposite by the press.

directions. o

.The Vguard heads and 50L of the wrist pins andthe shoe construction to cooperate therewith, tormthe subject of the copending application of Frank li. Belluche tiled of even date herewith entitled Mechanical movements. It will be noted that these guard heads have no ettectduring the ordi nary running of the bed atV speed, since,

under these conditions, the pressure isV always between the effective shoes and the reversing rolls, and these ei'iective shoes are not wide enough to be contacted by the curved faces 58 oit' the guard heads. The prime purpose of these guard heads is to prevent accidental movement of the bed outrot its proper position with respect to the revers- Vving rolls, to prevent over-running of the bed during starting, and to enable the press to be turned over in a reverse direction when desired, The 'manner in which the guard heads operate will be understood from the diagram, Fig. ll. In the full-line position indicated at itin this diagram the reversing shoes, during the uniform movement of Vthe ied towards the right, are approaching the wrist pin e?, which is moving upward in its travel. It will be observedthat if the lower part 5G ont the guard snoe were of full height, it would collide with the reversing roll. However, this part of the guard shoe being only of a height equal to the width ot the guard head 50, the tlatside 59 of the latter can enter beneath the end of the shoe. The position indicated by shows how the flat side of the guard head thus enters beneath the shoe 56. In the position indicated at a, the reversing roll has started to operate, but the curved edge 58 of the guard head is not operative because` the eiiective shoe is not wide enough to be engaged byit. In the position indicated at Z) the reversing roll is just leaving the space between the eective shoeand the wide part 55 of the guard shoe,

and it will be seen that the curved tace 58 of the guard head is in position to engage theV position indicated at 0, which is the position at which the uniform movement of the bed starts, the curvedface 58 0f the guard head isV still in position to be engaged by. the narrow part 56 o the guard shoe, but is just about to leave the same in a downward direction; i

The only time when the bed would be otherwise out of control is during the travel of the wrist pins between the points b to the points c. During this time, the bed is held in its proper relative position with respect to the wrist pins by the guard heads, which are at that time in a position to be engaged by the narrow portions 56 of the guard shoes. li it isv desired to turn the press in a reverse direction, the bed is carried over the space during which the wrist pins move from the points c to the points t) by the driving action ot' the curved faces 58 of the guard heads upon the narrow portions 5670i the guard shoes, o

l-laving thus fully described my invention, what i claim as new, and desire to secure by Letters Patent, is:

l. yin a mechanical movement, arreciprocable body, a pair of rotary wrist-pins for decting the reversing of the movement of 'aid bodyat the ends of the travel of the atter, and reversing shoes carried by said body and cooperating withsaid wrist-pins,

said wrist-pins entering said shoes transversely of the movement of said body and from opposite directions.

2. ln a mechanical movement, a reciprocable body, a pair of rotaryA wrist-pins for eii'ecting thereversing ot' the movement of Asaid body at the ends of the travelof the 1iatter, and reversing shoes carried by said Y body and cooperating with said wrist-pins, each of said shoes being disposed mainly on that side of the longitudinal center of said body which is opposite to the end at which the reversal it eti'ects occurs and to extend oppositely to the other in a direction transversely of the movement of said body.

3. ln a mechanical movement, a reciproable body, a pair of rotary wrist-pins for effecting the reversing of the movement ot said body at theends of the travel oit the ji latter, and reversing shoes carried by said body and cooperating with said wrist pins, each of said shoes being placed at an angle of less than 900 to the plane of reciprocation of said body, and being disposed n nly on that side of .the longitudinal center of said Vbody which is oppositeto the end which the reversal it eliects occurs to entend oppositely to the other in a direction transversely of the movement vof said body.

4f. In a mechanical movement, a reciprocable body, a pair'o'f rotary wrist-pins T"or effecting the reversing of the movements of said body and disposed with their, ends eirtending opposite directions transwerself,r

lli)

lio

of the movementof said body, and reversing shoes carried hy said body and cooperating with said wrist-pins.

5 In a mechanical movement, a reciprocable body, a pair of rotary wrist-pins for effecting the reversing of' the movements of said body and disposed with their ends eX- tending in opposite directions transversely of the movement of said body, and reversing shoes carried by said body and cooperating with said wrist-pins, each of said shoes being disposed mainl on that side of the 1ongitudinal center ot said body which is opposite to the end at which the reversal it f effects occurs.

6. In a mechanical movement, a reciprocable body,.reversmg shoes carried by said body, two racks associated with said body,

rotary reversing mechanism having means Y ing first one of said pinions into operative relation with one of said racks and then the other pinion into operative relation with the other rack.

8. In a mechanical'movement, a reciprocable body, reversing shoes associated with said body, two reversing wheels having means cooperating with said shoes for reversing the bed, two pinions, each meshing with one of said wheels and adapted to mesh with one of said racks, and means for shifting first one of said pinions into operative relation with one of said racks and then the other pinion into operative relation with the other rack. v

9. In a mechanical movement, a reciprocable body, reversing shoesy associated with said body, each disposed mainly on that side of the center of said body opposite to that at which t-he reversal it effects occurs, two racks associated with said body, two reversing wheels having means coopcgitlng with said shoes for reversing the bed, two pinions drivenat face s )eed with said reversing wheels, and means ior shifting first one of said pinions into operative relation with one of said racks and then the other pinion into operative relation with the other rack.

l0. In a mechanical movement, a reciprocable body, reversing shoes associated with said body, said shoes being placed at an angle of less than 90o to the plane of reciprocation of said body and each being disposed mainly on that side of the center of said body opposite to that at which the reversal it effects occurs, two racks associated with said body, two reversing wheels having means cooperating with said shoes foi-,reversing the bed, two pinions driven at face speed with said reversing wheels, and means for shifting irst one of said pinions into operative relation with one of said racks and then the other pinion into operative relation with the other rack.

l1. In a mechanical movement, a reciprocable body, reversing shoes associated with said body, two racks associated with said body, two reversing Wheels having wristpins eXtendinfY therefrom in opposite directions, each o? said wrist-pins cooperatin with one of said shoes for reversing the'be two pinions driven at face speed with said reversing wheels, and means for shifting first one of said pinions into operative relation with one of said racks and then the other pinion into operative relation with the other rack.

BURT F. UPHAM.

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