US787141A - Offset mechanism for printing-machines. - Google Patents

Description

N0. 787,141. PATENTED APR. 11, 1905. H. M. BARBER.

OFFSET MECHANISM FOR PRINTING MACHINES.

APPLIOATION FILED NOV. 21, 1904.

7 SHEBTSSHEBT 1.

PATENTED APR. 11, 1905.

H. M. BARBER.

OFFSET MECHANISM FOR PRINTING MACHINES.

APPLIOATION FILED NOV. 21, 1904.

7 SHEETS-SHEET 2.

5 0 9 1 1 1 R P A D E T N E m A P H. M. BARBER.

OFFSET MECHANISM FOR PRINTING MACHINES.

APPLICATION FILED NOV. 21, 1904.

7 SHEETS-SHEET 4.

No. 787,141. PATENTED APR. 11, 1905. H.- M. BARBER.

OFFSET MECHANISM FOR PRINTING MACHINES.

APPLICATION FILED NOV. 21, 1904.

7 SHEETS-$111731 5.

)"Ia'ineaa e01 7,141. PATENTED APR. 11, 1905. y H. M. BARBER. OFFSET MECHANISM FOR PRINTING MACHINES.

APPLICATION FILED NOV. 21, 1904.

'1 SHEETS-SHEET e.

PATENTED APR. 11, 1905.

H. M. BARBER. OFFSET MECHANISM FOR PRINTING MACHINES.

APPLICATION FILED NOV. 21, 1904.

7 SHEETS-SHEET '7.

NH I

No. 787.141.. Patented April 11, 1905.

."l.": UNITED STATES PATENT @EETQE. I llUlVAlil .\I. hAItBIiR, ()F S'IUNIXH'IOX, COXNIIC'IIUU'I ASHIHNUII It) B.

CU'FIhICIIIJ A: SONS COMPANY, OF NICIV YUhK, N. V.. A (.()I I (.)I\.-X'II( )N ()F XICIV J IIRSEY.

OFFSET MECHANISM FOR PRINTING-MACHINES- SPECIFICATION forming part of Letters Patent No. 787,141, dated April 11, 1905.

Apnlieation fileti November 21,1904. Serial Ne. 233,654.

'Zo //'///m/- H m/ m/rcwr/r: 1 putting the shifting mechanism into operalle it Itnown that I, I'IowAun M. Bantam, a 1 tion; Fig. XVII, a side view illustrating a citizen of the United States, and a residentof modification of the shifting mechanism; Fig. Stonington, in the county of New London and XVIII, a front view corresponding with Fig. 5 State of tonnecticnt, have invented a new and XVII.

useful Improvement in Offset Mechanism for 1t) designates the framing of the machine, Irintirig-Machines. of which the follmvingis (.:ontaining the journal-box II for the shaft a specilication. 12 of the i1npression-evlinder II}, which may 'lhis invention relates to provision for the either have its peripheral portiondivided and [O shifting of the tympan or tympans upon the separated into a unmher of arcs ll equal to surface or surfaces of the impression-eylinthe nmnher of impression-faces and correder of a printing-inachine to which it or they sponding tympans If) that may he desired or is or are attached: and it consists in the novel may he constructed with only one impressionmeans illustrated by theaccompanyingdraw- 5 face and provided with a corresponding sinl5 ings, and hereinafter descrihed and claimed, gle tympan. In the example represented t for automatically producing and controlling I there are four impression-faces II: and correthe shifting movements \vherehy certain im spending tympans 15. For each tympan poi-taut advantages hereinafter explained are i there is represented as provided within the ohtained. cylinder a set of four tympan-rollers, of 20 Figure I. in the accompanying drawings, is l which two, ll) IT, are tympan-carrying rollf a side view of the cylinder and such other ers and two, IS 19, are feed rollers. 'lhe parts of a printing-machine as are necessary rollers It are the supply or let-olf rollers, to the illustration of my invention and are I from which the tympans are talten to the im visihle from the outside of the machine, the pression-faces ll, and those 17 are the wind- 25 cylinder having four tympans and as many ing or take-up rollers, onto which the smut- )JLj sets of rollers therefor. Fig. II is a correted portions of the tympans are taken from l sponding elevation with some of the parts I the said faces. The several carrying-rollers omitted to expose others to view; Fig. III, a g and feed-rollers, which are hest shown in Fig. sideview of a cam to he hereinaftei'descrihed. I XIV, are journaled in hearings in plates 25,

30 Fig. IV is an elevation corresponding with 1 secured hy bolts 25* on the heads of the cyl- Fig. I. hut taken transversely thereto and l inder l5 Fig. XIII represents one of these showingpartof the framinginsection. Figs. plates, of which there is one for each set of V, VI. VII, VIII, IX, and X are views of rollers at each end of the cylinder. The said certain details, which will he hereinafter explates may he considered as parts of the cyl- 35 plained, Figs. V to IX heing on a larger scale 1 inder-hemls.

than Figs. I, II, III, IV; Fig. XI, a vertical The feeda'ollers It It) and carrying-rollers section taken parallel with Figs. I and II in l IT derive their movements at the proper in- 8 the line XI XI of Fig. IV as viewed from tervals of time fol-shifting the tympans from the right: Fig. XI' a view corresponding; reciprocating toothed racks 21), one for each 40 with Fig. XI of some details which are partly tympan. 'lhese raclts in all the ligures of the hidden in said ligure: Figs. XII and XIII, drawingsinwhichthey appear, exceptin Figs. detail views to he hereinafter explained; XVII and XVIII, which will he hereinafter Fig. XIV, a transverse section of the im separately descrihed, are of curved form and pressioncylinder and the rollers contained constructed on the arcs of sectors 20* and may 45 therein for carrying and feeding the tympan; he termed toothed sectors. The said sec- Fig. XV, a diagram of the train of gearing tors are pivoted, as shown in Fig. XI, by for shifting one of the tympans. Fig. XVI pivots 2t to the plates on one of the heads 9 is a side view of the tripping mechanism for l of the cylinder on different sides of its shaft,

and by their swinging or reciprocating to-andfro motion on these pivots they operate the several trains of gearing through which the several rollers are set in motion, these reciprocating movements being effected at the proper determined times through rollers 22, which are pivoted to them and which run inside of one, 23, and outside of another, 24, of two stationary cams, which are formed eccentrically to the cylinder on a plate 47, bolted to the journal-box 11 inside of the side framing by bolts 47*, the entry of the said rollers between the said cams at the proper times being produced and controlled by a swinging curved switch 26, which is pivoted to the stationary cam-plate 47 by a fixed pivot 27 and operated, as hereinafter described, by means of a toggle 28 29, which connects it with a short rock-shaft 30, fitted to a bearing in the side framing 10. The curvature of the inner face of this switch so conforms to the inner curvature of the cam 23 that it may form a continuation thereof.

The gearing between the toothed sectors and the feeding and take-up rollers is partly shown in Figs. I, II, IV, and XI; but the entire train for one of the tympans is shown separately in Fig. XV. Each sector meshes for the purpose of driving its respective rollers with a corresponding pinion 31, which turns loosely on a fixed stud 32, Figs. XI, XII, XV, secured in the plate 25, and there is attached to said pinion a larger gear 33, which meshes with a pinion 34, fast on the feed-roller 19, and so drives the said roller, which, being geared by gears 36, Fig. XIV, inside of the cylinder with the other feedroller, 18, drives the latter. The said roller 19 also carries outside of the cylinder a gear 37, which meshes with a gear 38, provided outside of the cylinder on one of the journals of the take-up roller 17, and so drives the lat ter. This journal is represented as constituted by a socket 39, (shown in axial section in Fig. VI and in cross-section in Fig. VII,) which has one end of the roller fitted into it, as shown in Fig. VI, with a square, so that both turn together. The said journal has fast upon it a ratchet-wheel 46, which is engaged by a pawl 57, pivoted to the plate 25, as shown in Fig. VII, the section of which is taken in the line VII VII of Fig. VI, the said ratchet-wheel and pawl serving to hold the take-up roller against the tension of the tympan and retain on the said roller the portion of the tympan taken up thereon.

The supply or let-ofi' roller 16 does not require to be and therefore is not represented as geared with or driven by the toothed sector, but is represented as intended to be turned for unwinding the tympan from it by the draft of the tympan itself when said roller is liberated, as will be hereinafter described, by the tripping of a locking-pawl 41, Figs. XI, Xl' This pawl, except while the shifting of the tympan is taking place, is engaged with a ratchet-wheel 42 on the journal of said roller. This journal, like that above described for the take-up roller, is represented in partly-sectional detail views, Figs. VIII and IX, as constituted by a socket 43, to which the roller is fitted with a square, so as to turn with it. In order to maintain the tension of the tympan, and yet obviate the danger of its being torn by the sudden stoppage of the rotation of the supplyroller when its locking-pawl 41 comes into operation after shifting, the ratchetwheel is fitted loosely to the journal and permitted to turn a little way thereon by making the keyway 60, which receives the key 61 for attaching it to the journal, wider than the key, as will be understood by reference to Fig. IX. This turning movement is controlled bya coilspring 40, which surrounds the outer portion of thejournal, one end of said spring being fastened to the ratchet-wheel by a pin 42' and the other end being fastened to the journal by pass ing through a slot 43*, cut across the end of the latter, as shown in Fig. IX, and being confined in said slot by a cap-plate 44, secured to the end of the journal by a screw 45, screwing into the end of the latter. The said spring allows the locking-pawl 41 to engage the ratchet-wheel and stop the free rotation of the supply-roller before the tympan-shift is completed. Thus the final amount of tympan required to complete the shift is obtained by the yielding of the spring, thus insuring at all times a tightly and smoothly drawn top sheet without breaks, which might be caused by suddenly stopping the rotation of the supplyroller.

To control the movement of the take-up roller 17 according to the diameter of the body of tympan upon it, a constantly-acting friction device is applied between the journal 39 of said roller and the gear 38, through which the said roller receives motion. This device is shown in the view Fig. VI, before referred to, and in Figs. V and VII, Fig. V being a face view and Fig. VII a cross-section in the line VII VII of Fig. VI. The said device consists of a spring-actuated clamp, between the two members of which the said gear is contained, as shown in Fig. V. One member of the clamp is constituted by the outer face of the ratchet-wheel 46, before mentioned, which is fast to the roller-journal and on the hub of which the gear is fitted to turn independently. The other member of said clamp is a disk 48, attached to the hub of said ratchet-wheel, so as to turn with it, by means of dowel-pins 49, fast in said disk and entering holes in said hub. Leather washers 48* are applied between the gear 38 and ratchetwheel 46 and disk 48. The pressure is applied to the clamp member 48 to produce the friction necessary for driving the roller by means of aspring 49' (represented in Fig. IV as a cruciform conc'avo-convex disk,) the said pressure being produced and adjusted IOC IOE

by a screw 50, which passes through thespring and screws into the end of the journal and the head of which bears against the spring. To secure the proper adjustment, there is fastened fixedly to the head of the screw an elastic arm 51, furnished \vitha teat which enters one of a series of notches in the outer face of the clamp member. The movement imparted to the gear :38 by its respective toothed rack 2') should be a little more than sntticient to give the take-up roller the necessary movement for shifting the tympan the distance necessary to present a clean portion on the face of the cylinder when the circumference of the body of the tympan contained on said roller is the smallest. Then as the said body increases the said gear will slip more and more in its clamp, and so obviate injuriously increasing tension on the tympan and liability to tear it. The friction may be adjusted at intervals between the successive shiftings of the tympan by means of the screw 50.

In order that the sectors 20* should act d uring their respective movements in one direction only on the trains of gearing hereinbefore described to produce the operations of the feed-rollers and take-up roller for shifting the tympans, the first gear 31 of each train, which turns loosely on its stud 32, has the second gear fitted to its hub, as shown in the section Fig. XII, to turn thereon, and the connection between the gears, by which 31 drives i tconsists of a ratchet-wheeloi, keyed to the hub 3i, and a pawl 55, attached to so that in the return movements of the racks 2t) there is no movement of the feed and take-up rollers. the latter rollers being locked by their respective pawls ST and ratchet wheels to.

It has been hereinbefore mentioned that the movements of the sectors 20* on their pivots 21 to produce the operations of the several tympan-rollers is produced at the proper times by rollers 22 on the several sectors running inside of one, 23. and outside of the other. 2%, of the two stationary cams under thedirectionof the swingingswitch 26. This switch at all times but when the shift is to be made is locked. as willbe presentlydescribed, in the position shown in dotted outline in Fig. X1, in which it is inoperative and allows the rollers 22 on the sectors 20* to pass outside of and clear of the cam 23, where they are inoperative, the sectors being then all held in the position relatively to the cylinder and to their gears '31. in which the uppermost of said sectors is represented in Figs. II and XI. This position of the sectors is maintained in part by the locking pawl I1 locking the ratchet-wheel 42 on the let-off rollers and in part by a strong coil-spring (see Fig. X) around the hub of the sector, one end of said spring being fastened to the sector and the other end to the plate 25. The locking of the switch 26 in the inoperative position described is effected partly by means of a leverarln on a rock-shaft (33, working in a bearing in a stand (ii on the top of the side framing the said arm having in its end a notch 65, 7

which receives, as shown in dotted outline in Fig. XI, the end of a toe at on the rock-shaft 30. This engagement of the toe and notch, with the toggle 2b 29, bent as shown in Fig. XVI and in dotted outline in Fig. XI, is retained partly by a spring (5T, Figs. II and IV, applied between an arm 68 on the rock-shaft 63 and an abutment 69 on the. stand 6%. and partly by a pushing-spring To, applied between an abutment TT on the stand (Si and an arm TT' on the rock-shaft 31), the said spring 6T exerting a constant tendency to press the lever-arm 62 toward the toe and the spring To acting to force the toe to upward into the notch (35. Thisdisengagementleaves the toggle free to be acted upon by the spring To, which straightens it, and so throws the switch 26 into the position shown in full outline in Fig. X1, in which it connects with the cam 23. \Vhen the proper time for the shift arrives, the lever-arm ($2 is thrown out of engagement from the toe 66 through the agency of a tripping-arm T0 on the rock-shaft 63, which is acted upon, as shown in Fig. XVI, by the inner end of a tappet T1, carried by a spurearTZ, which is fitted to turn on a fixed stud 43 on the framing and which meshes with and derives constant rotary motion from a gear Ti with a different number of teeth and which is fast on the cvlimler-shaft and carries a tappet T5. The tappet TI is fitted to slide radially toward and from the center of its gear T2 and has applied to it a coilspring by which it is pressed outward to a position in which during the rotation of its gear T2 it passes by the trirming-lever arm TO without moving it until the time arrives for the shift, when the said tappet is pushed inward far enough to strike said arm by means of the fixed tappet T5 on the gear Ti. which then arrives opposite to its outer end. The said gears T2 T3 and their tappets and their action upon the tripping-lever to start the shifting mechanism are such as are described in United States Letters Patent No. M51637, and therefore need only very brief description here. It has been just stated that the said gears have different numbers of teeth. Suppose, for example, that TI has one hundred and thirty and that T2 has one hundred and twenty-nine teeth, it being desired to shift the tympan during every one hundred and thirtieth revolution of the cylinder. Every time the gear TI makes a rev olution the gear T2 lacks one tooth of the full revolution, so that during one hundred and thirty revolutions of the gear TI the gear T2 will make only one hundred and twenty nine revolutions. 'lherefore in every one hun- .drcd and thirtieth revolution of the said gear 7 4 the two tappets come together and the tappet 71 pushes out the tripping-lever arm, and so disengages the lever-arm 62 and toe 66, leaving the toggle 28 29 free to be straightened by the pressure of the spring 76, and thereby to push the switch 26 into the operative position, (shown in full outline in Fig. X1 and dotted in Fig. 11,) in which it forms a prolongation of the cam 23.

For the purpose of throwing out the switch 26 into the inoperative position shown in dotted outline inFig. XI there is carried by the ylinder a cam 90. (Represented in Fig. 11 as bolted to the cylinder-driving gear 91 and shown detached in Fig. III.) This cam in the next revolution of the cylinder after the shift of the tympans strikes an arm 92, which is fast on the rock-shaft 30, and so moves the said arm toward the center of the cylinder and produces the flexure of the toggle 28 29, by which the switch is thrown out, at the same time bringing the toe 66 into the engagement with the notch of the lever-arm 62, by which the switch is so locked out, its position being then such that as the sectors are carried round by the cylinder in the positions relatively thereto, in which the two upper sectors are shown in Fig. XI, their rollers 22 will pass by it and outside of the cam 23 without any movement of the sectors on their pivots 21 being produced.

It has been hereinbefore mentioned that except during the time-of making the shift of a tympan its supply-roller 16 is locked by the engagement with its ratchet-wheel 42 of its locking-pawl 41. The pawls a1 are pivoted, as shown in Fig. XI, to the cylinder-head plates 25 by pivots 79 and each provided with a backwardly-projecting heel 80, which at the proper times for starting the shift is acted upon by means of a stud 81, projecting from the inner face of its respective sector, to throw the pawl out of engagement, the engagement being at other times retained by a spring 82, applied between the said pawl-and an abutment 83 on the cylinder-head. To provide for retaining this disengagement during the shift, the pawls are each provided on one side with a projection 8 1, which engages, as shown in Fig. XI and also in the detail view Fig. Xl' in a notch in one arm of an elbow-shaped detent 85, which is pivoted to the plate 25 by a pivot 86, and this latter engagement is caused to be retained by a ooil-spring85', applied in a well-known manner between the said detent and its pivot until another stud 87 on the sector strikes the end of a screw 88 in the other arm of the detent 85 just before the stoppage of the shifting movement, and so releases the projection 8 1 of the pawl and allows the latter to be reengaged with the ratchet-wheel 12 by the pressure of its spring 82. The adjustment of the screw 88 to project more or less from the elbow provides for the action of the stud 87 to reengage the stop-pawl with its ratchet-wheel in proper time for the stoppage of the supply-roller 16.

All parts of the shifting mechanism and their several and respective operations having now been explained. I will briefly describe their successive operations in makinga shift, first supposing the switch 26 to have just been thrown into the operative position shown in full outline in Fig. X1 and the roller 22 of that sector 20"", which is, in the upper righthand portion of that figu re, having just been brought to the switch by the rotation of the cylinder in the direction of the arrow shown upon the latter. The continued rotation of the cylinder carries the said roller 22 along the inner face of the switch 26 and along the inner face of the cam 23, and by its so running along the sector is caused to turn on its pivot in the opposite direction to that in which the cylinder itself turns. During the latter part of this movement of the sector the unlocking of the ratchet-wheel of the supply-roller is produced by the action of the stud 81 of the sector upon the heel of the locking-pawl 11. The latter now being engaged by the detent is held out of engagement with the ratchet-wheel 42 on the supply-rollcr until the shift is completed, as hereinafter described. During the whole of the movement of the sector in the direction described no movement of the tympan takes place, the gear 31 then turning on the stud 32 without turning the gear 33, because the ratchet-wheel 54 slips past the pawl 55. The further continued rotation of the cylinder carries the roller to the cam 24:, and by the passing of said rollcr over this cam the movement of the sector is reversed, thus producing the turning of the gear 33 in the proper direction to produce, through the gears 34 37 38, the turning of the take-up roller 17 and the shifting of the tympan. As this movement of the sector is nearly completed the stud 87 the reoncomes into operation on the point of the screw 88 of the detent 85, and so releases the locking-pawl 11 of the supply-roller and allows it to come into operation on the ratchet-wheel on said roller.

During a single revolutionof the cylinder the operation hereinabove described with reference to one tympan shifting sector and the mechanism through which it acts on its respective tympan takes place with respect to all four tympans, one after another, and during the next revolution of the cylinder the cam 90 on the cylinder-gear 91 comes into operation on the arm 92 of the rock-shaft 30, and so throws out the switch 26 to its inoperative position, where it remains until, after the determined number of revolutions of the cylinder, the tappets 71 75 again come together for repeating the shifting of each of the tympans, as described, during a single revolution of the cylinder.

An important feature of the example which I have selected for illustration of my invention and have herein particularly described is that the radii of the sectors which produce the shifting movement is less than the radius of the impression-cylinder to which they are applied. This makes in the space between the circumterence ot' the c\ linder and its shat't room for as many of these sectors as 1 In the modil'ication of my invention shown in Figs. XYlI and XYIH the reciprocating 1 toothed rack 2o instead of being in the form of an arc and constructed directly on a sector consists of a straight bar pivoted at one end to a swinging piece 20 in the form of a bellcranl lever. which is pivoted to the cylinder by a pivot ll in the same way in which the toothed sector id is pivoted thereto. The said straight raclt id is conlined in engagement with the gear 31 by means of two rollers ill in a \'()l\'t [)5. which is litted to thestud 32 so as to be capable of the nec 'ary slight oscillation thereon. The lever 20 resembles the sector 20*, except that the curved rack 20. integral with the latter sector, omitted and the pivoted straight rack substituted, and the said lever is provided, lilte the sector, with a similar cam-roller 2'2 and a similar stud SI for said rack to said rollers, and means for prod ucing the movement of said rack by the revolution of the cylinder.

2. The combination with the impressioncylinder of a printing-machine adapted to receive a plurality ol tympans and provided with a corresponding number of sets of tympanrollers. oi a correspomling number of reciprocating raclts carried by the cylinderhead at ditlerent points thereon, gearing between each of said racks and its respective set of tympan-rollers through which movement is transmitted from the rack to the rollers, and a means common to all ol said raclts for pro ducing their movements by the revolution of the cylinder.

3. The combination with the impressioncylinder of a printing-machine adapted to receive a plurality ol tympansand provided with a corresponding number of sets of tympanrollers, ot' a corresponding number of reciprocating raclts carried by the cylinderhead at different points, gearing between each of said raclts and its respective setol tympan-rollers through which movement is transmitted from the raclt to the rollers, and a stationary cam for producing the movements of the several raclts in succession by and during one revolution of the cylinder.

4c. The combination with the impression 1 cylinder of a printing-machine and a tympantripping the locking-pawl ot' the tympansupthe shift and disengaged as soon as the shift iscompleted. anism the tympan travels at the same speed throughout the entire operation and is subjected to a severe shoclt at the engagement of the clutch. l y the mechanism herein de scribed. operated by a cam-actuated raclt, the tympan is started and stopped so gradually \Yith the clutclroperated mechj winding roller in said cylinder, of a recipro eating rack carried by said cylinder, andgearing between said rack and roller through which movement is transmitted directly from said rack to said roller during the movement of the rack in one direction only.

The combination with the impressioncylinder of a printing-machine and tympanrollers applied within said cylinder, of a re ciprocating rack carried by said cylinder for producing the movement of said rollers and a spring applied to said rack for holding it in an inoperative position.

(3. The combination with the impressioncylinder of a printing-machinc and tympan supply and take-up rollers in said cylinder, of

that all shoclt is eliminated, and owing to the very gradual movement imparted to it at the I cylinder of a plil'itillgfilltlcll1110 and a tympancommencement and end of the shift it may be operated at a higher rate of speed without danger of breakage. always leavii'ig a smooth tightly-drawn top sheet to receive the offset. \Yhat i claim as my invention l. The combination with the impressioncylinder of a printing-n'iachine and tympanrollers applied within said cylinder, of a reciprocating rack carried by said cylinder, gearing between said ltlCh' and rollers through which movement is transmitted directly from a reciprocating rack carried by said cylinder and gearing between said raclt and the takeup roller for turning the latter, a locking device applied to the supply-roller, and a projection on said raclt lor disengaging said device and liberating the latter roller.

T. The combination with the impressionwinding roller in said cylinder, of a reciproeating l't\(3l( carried by said cylinder, gearing between said rack and winding-roller includ- 1 ing a gear on said roller through which motion is transmitted from said rack to said roller, and a spring-controllerl friction device between said gear and said roller.

e. The combination with the impressioncylinder of a printing-machinc and tympan supply and talte-up rollers in said cylinder, of

a reciprocating rack carried by said cylinder and gearing between said rack and the takeup roller for turning the latter, a ratchetwheel on the supply-roller and a locking-pawl wheel on the supply-roller and a locking-pawl on the cylinder-head for engaging with said ratchet-wheel to lock the said roller and a spring between said ratchet-wheel and the supply-roller.

10. The combination with the impressioncylinder of a printing-machine and tympanrollers applied within said cylinder, of a reciprocating rack carried by said cylinder,gear

ing between said rack and rollers through which movement is transmitted from said rack to said rollers, stationary cams through which by the revolution of the cylinder the movement of the rack in opposite directions is produced, a switch forproducing the engagement of the rack with said cams and automatic means for producing said engagement at predetermined times for shifting the tympan.

11. The combination with the impressioncylinder of a printing-machine and tympanrollers applied within said cylinder, of a sector pivoted to said cylinder, gearing between said sector and rollers through which movement is transmitted directly from said sector to said rollers, and means for producing the movement of said sector by the revolution of the cylinder.

12. The combination with the impressioncylinder of a printingmachine and tympanrollers applied within said cylinder, of a sector pivoted to the cylinder and of less radius than the cylinder, gearing between said sector and rollers through which movement is transmitted from said sector to said rollers and means for producing the movement of said sector by the revolution of the cylinder.

13. The combination with the impressioncylinder of a printing-machine adapted to receive a plurality of tympans and provided with a corresponding number of sets of tympan-rollers, of a corresponding number of sectors pivoted to the cylinder-head at different points, gearing between each sector and its respective set of tympan-rollers through which movement is transmitted from the sector to the rollers, and a means common to all of said sectors for producing their movements by the 5 revolution of the cylinder.

14:. The combination with the impressioncylinder of a printing-machine adapted to receive a plurality of tympans and provided with a corresponding number of sets of tympan-rollers, of a corresponding number of sectors pivoted to the cylinder-head at ditferent points, gearing between each sector and its respective set of tympan-rollers through which movement is transmitted from the sector to the rollers, and a stationary cam for producing the movements of the several sectors in succession by and during one revolution of the cylinder.

15. The combination with the impressioncylinder of a printing-machine and a tympanwinding roller in said cylinder, of aswinging sector pivoted to said cylinder, gearing between said sector and roller for directly producing the movement of the roller by the swinging of the sector, said gearing comprising means which transmit the so-produced movement to the roller during the movement of the sector in one direction only.

16. The combination with the impressioncylinder of a printing-machine and tympanrollers applied within said cylinder, of a sector pivoted to said cylinder for producing the movement of the said rollers and a spring applied to said sector for holding it in an inoperative position.

1'7. The combination with the impressioncylinder of a printing-machine and tympan supply and take-up rollers in said cylinder, of a sector pivoted to said cylinder and gearing between said sector and the take-up roller for turning the latter, a locking device applied to the supply-roller, and a projection on said sector for disengaging said device and liberating the latter roller.

18. The combination with the impressioncylinder of a p rinting-machine and a tympanwinding roller in said cylinder, of a toothed sector pivoted to said cylinder, gearing between said sector and winding-roller including a gear on said roller through which motion is transmitted from said sector to said roller, and a spring-controlled friction device between said gear and said roller.

19. The combination with the impressioncylinder of a printing-machine and tympan supply and take-up rollers in said cylinder, of

a sector pivoted to said cylinder and gearing between said sector and the take-up roller for turning the latter, a ratchet-wheel on the supply-roller and a locking-pawl on the cylinderhead for engaging with said ratchet-wheel to lock the said roller, a projection on the sector for disengaging the pawl from the ratchetwheel, a detent on the cylinder-head for bolding the pawl disengaged, and a projection on the sector for producing the disengagement of the detent from the locking-pawl.

20. The combination with the impressioncylinder of a printing-machine and tympan supply and take-up rollers in said cylinder, of a sector pivoted to said cylinder and gearing hetween said sector and the take-up roller for turning the latter. a ratchet-wheel on the sup ply-roller and a locking-pawl on the cylinderhead for engaging with said ratchet-wheel to lock the said roller and a spring between said ratchet-whcel and the supplyroller.

21, The combination with the impressioncylinder of a printing-machine and tympanrollers applied within said cylinder, of a sector pivoted to said cylinder, gearing between said sector and rollers through which movement is transmitted from said sector to said rollers. stationary cams through which by the revolution of the cylinder the movement of the sector in opposite directions is produced, a switch for producing the engagement of the sector with said cams and automatic means for producing said engagement at predetermined times for shifting the tympan.

22. The combination with the impressioncylinder of a priMing-machine and tympanrollers applied within said cylinder, of a sector pivoted to said cylinder, gearingbetween said sector and rollers through which movement is transmitted from said sector to said rollers, stationary cams through which by revolution of the cylinder the movement of the sector in opposite directions is produced, a switch for producing the engagement of the sector with said cams, a locking device for holding said switch in an inoperative position, l a spring for holding said locking device in l operation, a spring for throwing said switch into its operative position and automatic 1 means for unlocking said locking device at predetermined times for shifting the tympan and permitting the latter spring to throw the switch into operation.

23. The comhination with the impressioncylinder of a printing-machine and tymganrollers applied within said cylinder, of a sector 2O pivoted to said cylinder, gearing between said sector and rollers through which movement is transmitted from said sector to said rollers, stationary cams '23, A, through which by the revolution of the cylinder the movement of the sector in opposite directions is produced, a switch 26 for producing the engagement of the sector with said cams, a locking device consisting of two rock-shafts 31), a too 66 and a lever-arm 62 on said rock-sha t'ts, a toggle 28, 22), between said rockshat't 30 and the switch for throwing the switch into and out of its operative position, a spring T6 applied to said rock-shaft 31) for straightening saitl toggle and throwing the switch into operative position, a spring (37 applied to the rock-shaft 63 for throwing said locking device into operation, a rotary tappet T1 deriving motion from the cylinder, and a lever-arm Tl) on the rock-shaft 63 on which said tappet acts to throw said locking device out of operation.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 15th day of November, A. L). 190%.

HO\VA RI) BARBER.

\Yitncsses:

A. R. S'IILLMAN, (i. BURDICK.

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