US1092941A - Feed control and tripping mechanism for printtng-presses. - Google Patents

Description

. S. MOE. FEED GONTROL'AND TRIPPING MECHANISM FOR PRINTING PRESJSBSLH 7 APPLICATION FILED iFEB.29, 1912.

6 SHEETS-SHEET 1.

r Eden-$7- v f 4 L1 J I Patented Apr. 14, 1 911 s. MOB. FEED CONTROL AND TRIPPING MECHANISM POR PRINTING PRESSES.

APPLIUATION FILED, IEB.29, 1912.

Patented Apr. 14,'1914.

6 SHEETS-SHEET 2.

S. MOE.

FEED CONTROL AND TRIPPING MECHANISM FOR PRINTINGPRESSES.

llll

APPLICATION IILEiTlEBJQ, 1912j Patented Apt-14, 1914.

6 SHEETS-SHEET 3.

S. MOE. FEED CONTROL AND TEIPPING MECHANISM FOR PRINTING PRESSES.

APPLICATION FILED FEB.29, 1912. 1,092,941

5 SHEETS-SHEET 4'.

N III W W ,m 2

S. MOE.

FEED CONTROL AND TRIPPING MECHANISM FOR PRINTING PRESSES.

APPLICATION FILED FEB.29, 1912; I

1 ,092,94c1 Patented Apr; 14, 1914.

5 SHEETS-SHEET 5.

UTE 's'mtrns PA.

SIVERT MOE, OF CHICAGO, ILLINOIS, ASS-IGNOR TO THE MIEHLE PRINTING PRESS & MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

Specification of Letters Patent. Patented Apr. 14, 1914:.

Application filed February 29, 1912. Serial No. 680,627.

To all whom it may concern Be it known that I, SIVERT Mon, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Feed Control and Tripping Mechanism for Printing-Presses, of which the following is a specification.

My invention pertains to improvements and features of novelty and utility in mechanism for controlling the feed of the sheets of paper to a rinting' press and for governing'the shilging of theimpressi'on cylinder, onto and off of impression; one object of the invention being to provide a device which will throw the cylinder ofi of impression and stop the feed of sheets to both of a pair of feed tables when the detector fingers of either table are operated because of an improperly fed sheet on either table, and at the same time preventing further feeding of the sheets from either table to the cylinder until the trouble of the improperly fed sheet has been remedied.

In order that a complete and full understanding of this invention may be had,I have illustrated a preferred and desirable embodiment of the same in the accompanying drawings forming a part of this specification, and to which reference should be' had in connection with the following detailed description.

In these drawings,Figure 1 is a fragmentary View, with certain parts omitted, of the mechanism associated wlth th'e'two feed tables; Fig. 2 is a fragmentary view, with parts omitted showing more or less diagrammaticalliybthe cylinder-tripping mechanism operate y the detectors of the feed thbles shownin Fig. 1 Fig. 3 is a fra entary elevation, on an enlarged scale, 0 the detector mechanism and gripper-operating device associated with one of the feed tables shown in Fig. 1; Fig. 4 is a section on line 4+4: of Fig. '3, showing in fragmentary elevation parts of the sheet-detector mechanism; Fig. 5 is a vertical section on line 55 of Fig. 4:; Fig. 6 is a partial elevation and partial section, on line 66, of the gri per-operat ing mechanism shown in the le -hand pontion of Fig. 3; Fig. 7 i's asection on line 7-7 of Fig.- 3; Fig. 8 is a horizontal section on line 8-8 of Fig. 7; andFig. 9 is a vertical section showing the construction of the parts for raising and lowering the feedroller of one of the tables. Referring first to Fig. 1, it will be noticed that the machine has a suitable frame 20, in which is {journaled the shaft 21 of an inn pression cylinder 22 adapted to be shifted onto and off of impression by the mechamsm illustrated in Fig. 2. The device, as

shown in Fig. 1, also includes upper and lower feed tables 23 and 24, respectively, each of such tables being equipped at its right-hand end, as the device is viewed in Fig. 1, with roller means for feeding. the sheets singly or individually to the table. In addition, the two tables have associated therewith the transfer cylinders 25 and 26, each supplied with .a gripper device 27 and 28, respectively, it being, of course, understood that the impression cylinder 22 referred to above has two oppositely-disposed impression surfaces 29 and 30, each supplied with its paper-holding or gripper mechanism 31 and 32, which are opened and closed atthe proper times by mechanism well understood in this art, and consequently not illustrated inthese drawings for the sake of clearness of illustration of the remaining parts. A portion of the double form-cylinder 33 which cooperates with the impression cylinder 22 is shown in Fig. 2.

. Inasmuch as the two means for advancing the sheets singly from the piles to the tables are substantially alike, a description. of one of the same will sufhce for both, it be i-ng understood, of course, that their oper aor hinged, suchframe or casing at its other end having rotatably mounted therein a roller 36 supplied around its periphery with a plurality of smaller rollers 37. Between the shaft 38 of the roller 36 and the shaft 34 there. is interposed a series of intermeshing ears 39 carried by the frame or casing 35,1. e gear atone end being fastened to the shaft 34, the other end gear being fastened; to'the shaft 38, whereby the revolution of the driveshaft 34 is transmitted through such gearing'to the roller 36. The casing or Y other arm of the bellcr'ank has a laterallyframe isconnectedto an arm (Fig. 9) loosely mounted on a suitably-supported shaft 41=by a link 42, such arm'40 and the roller 36 linked thereto being normally pulled down into aper-eng'aging position by coiled contractile spring 43having one end fastened to the arm 40 and the other end secured to any suitable stationary support. The shaft 41 also has loosely-mounted thereon a three armed-member 44, onearm 45 of which bears a roller 46 cooperating with a cam 47 on a .suitably' -driven shaft 48, the

driving mechanism of which, for the sake of clearnes's'of illustration, has been omitted. Another arm49 of the member 44 has pivoted thereto at'50 a small bell-crank lever .51 capable of adjustment with relation to the arm 49 by ineans of a screw 52 passing through one arm of the bell-crank and cooperating with a lug 53 on-the arm 49. The

extended finger 54g projecting beneath the 4 arm 40, so that as the Ifiember 44,;by the cam 47, no sheet isfed forwardly during such raised condition of the roller.

'The feeding mechanism of the top table is also equipped above the shaft 41 with a shaft 55 carrying a finger 56 ad'aptedt o berocked' into and out of the path of travel of the r emaini-ng arm 57 of the member 44,'which is supplied near its. end. with a notch or recess 58. :It should therefore be, apparent that if the shaft 55 is rocked so asto swing the projection or finger, 56; into the notch 58, then descent of the roller 36 into sheet-engaging position is prevented so long as the. finger 56 is held in such lowered position. 011- this shaft 55 is loosely mounted a handle 59 normally pulled tothe left, as viewed in Fig. 1, by a coiled contractile spring 60, The function of this spring60 is to keep the rod 72 normally elevated, the foot-piece v71 being normally out of engagement with the projection'TO; In Fig.1 the handle 59 and rod 72 are shown in the completed act'of depressing thearms 61 and 66,1nto locking engagement with the hooks 62. and 67, respectively.

The shaft 55 has fixed theretoan arm 61, engaging which is the hookend62 of a lever 63 loosely fulcrumed on the shaft 34 and normallypulled by a spring 64 to cause the, book 62 to engage the arm 61, and when thescpartsare so engaged, rocking "of the shaft 55 to the left to bring, the finger or pin 56 in the path of travel of the arm. 58 is prevented. I 4 The shaft 65 of. the lower feeding mechanism, corresponding to the shaft 55 of the upper mechanism, has fixed thereto an arm '66, coacting with which is the hook end 67 of falever 68 fulcrunied on the lower shaft 34.-

and operated'upon by a coiled spring 69. The arm '66 has a rounded projection 70,

hearing on the top of which is a foot piece 71 on the bottom endof a rod 72- slidable in" a bearing 73. The upper end ofrod '72 passes through an .apertured block 74 swiveled on an arm 75 constituting apart or lateral extension of the handle 59. The rod 7 2 has fixed thereto a collar. 7 6, between which and the block 74, and surrounding the rod, is interposed a coiled expansion spring '77, the upper end of the rod protruding be yond the block 74 having pinnedthereto a collar 78 limiting the downward-movement of the rod. a

The arm 61 is provided withan out-standing pin 61 in the downward path of the'e'xtension 75 of the handle 59. In practice I preferably employ a spring surrounding the shaft for turning the same, but for the sake ofblehrness there is illustrated a- I compression spring 61 pressing against'the under sideof the arm 61 and adapted to rock 1 "the shaft "55 having the pin 56 when the.

arm 61 is released from the hook 62'. A-

similar spring-66 has the same function with respect to the arm 66. It will'be seen that whenthe. handle 59 is pulled to the right, as shown in final position in Fig. l,

the extension 75 thereofwill have engaged; the pin 61% and forced the arm 61 into en- 1 ga'gement with the book 62, the foot-piece 71 similarly forcing the arm 66 into engagement with the hook 67.

On releasing the handle 59, the spring 60 draws the parts 75 f and 7-1 out of engagement with the pin' 61'. 9

and projection 70, so thatwhen thehooks 62 and 67 are drawn away-from the arms61 and 66 respectively the compression ,springs 7 61 and 66 are free to rock the shafts 55 4 and 65 respectively, thus lowering. the pins 56 into locking contact with the arms 57.

. Leaving the operating. mechanism for these paper-feeding rollers 36 for the time being andturning our attention to the .de-.''

.tector mechanism, it will be noticed that each feed table is provided with a series of" detector fingers, and inasmuch as their con-, strhction and that of their operating mecha nismare substantially. alike, I will describe: I

only thatfor the upper table. O'n a suitably supported cross-shaft 79. at the lower end of the feed table 23 (Figs. 1, 3, 4 and 5), a I

sleeve 80 is loosely mounted, such sleeve hav v ing fixe lthereto a plurality of dependingj" arms'81, only one of which is shown inlli'g.

4g-each of such arms having pivoted thereto a forwardly-extending detector-finger 82, the arm in addition having a projecting pin 83 constituting a stop for the downward swinging of the detector finger. As is well understood in this art, these fingers ride back and forth on top of the sheets, and so long as the sheets are properly fed the detector fingers are inoperative, but if no sheet is fed or a sheet is improperly fed, one or more of the fingers drop into a depression or recess of the tongue over which'it slides, so that further'forward travel of the detector finger or fingers is temporarily prevented. In order to bring about this constant oscillation of the sleeve 80 and continuous backward and forward travel of the pivoted detector-fingers 82, I fix to the sleeve a bent arm 81-, spring-pulled to the right as the parts are viewed in Fig. 3,that is, to the left as the parts are viewed in Fig. by a coiled contractile spring 85, the upper end of this arm having a substantially semicircular cavity 86 adapted to accommodate a pin 87 projecting from the side of a pawl 88 pivoted at 89 to the upper end of an arm 90 loosely mounted on the shaft 79 and oscillated on such shaft by means of a rod 91 pivoted to the arm at 92, the other .end of the rod being pivoted to one end of a lever 93 fulcrumed at 94 and carrying at its upper end a roller 95 coacting with the faceof a cam 96 on the power-drivenshaft 48.. Between the arm 90 and the 'bearin 97 of the shaft 79 there is fixed to such sha a ratchet sector 98, the teeth of which are disposed below the pawl 88, as is clearly illustrated.

As the rod 91 is shifted back and'forth by the action of the cam 96, the arm 90 is oscillated on the shaft 79 and thesleeve 80 is oscillated and its detector fingers 82 caused to travel back and forth with the arm 90-, being pulled in one direction by the spring 85 as/the arm 90 travels in the same direction, and being pulled in the opposite direction against the action of this spring by'the arm 90 and the pin.87 in the recess 86 of the berlt arm 84. During such oscillation of the parts,that is, as long as the sheets of paper are properly fed beneath the detector finger,sthe pawl 88 does not engage with the ratchet 98, being held elevated away from the teeth of the ratchet by the pin 87 resid-' ing in the recess 86. If, however, one of the d etec .or fingers drops into the recess of the tongue beneath it because of the fact that no sheet has been fed or a sheet has been improperly fed, then the travel of the detector finger, the sleeve 80 and the arm 84 is ar- -rested, so that as the arm 90 continues its 60 travel in the same direction, the pin 87 of the pawl passes out of the recess or cavity 86, thereby permitting the pawl 88 to drop into engagement with the teeth of the. ratchet 98, the result being that as the arm 65 90 continues its movement, the shaft 79 to detector fingers discover that no sheet has.

been fed or that a sheet has been improperly I advanced, the arm 99 swings to the left,

carrying with it the rod 102, which in turn rocks the lever 63 so as to uncatch the hook 62 from the arm 61, permitting the shaft 55 to turn in a counter-clockwise direction under the action of the compression spring 61 to bring the finger 56 into the recess 58 of arm 57 rendering inoperative the paperfeeding function of the roller 36 by prevent ing its descent into contact with the top sheet of the pile beneath it.

The gripper-operating elements for the cylinder 25 will now be described, reference being had more especially to Figs. 3 and 6. As is customary, the gripper-shaft of this cylinder, as is shown in Fig. 6, is supplied with the usual tumbler 104, which cotiperates with two pins or rods 105 and 106 slidably mounted in bearings 107 and 108 on the machine frame. These rods or pins are connected together by a yoke 109, which also has fastened thereto a third or intermediate rod 110 sliding in a bearing 111,

this rod being hollow, in part at least, to v accommodate and receive a coiled expansion spring 112 in the bearing 111, one end of which. bears against the rod and the other end against a plate 113 fixed to the bearing. It should'be clear that this spring tends to slide the two tumbler-shifting pins 105 and 106 out of the path of travel of the tumbler. The yoke 109 also has formed as a part thereof an apertured boss 114, slidable in which is a rod 115. This rod or sliding pin 115 is recessed on one side at 116 for the accommodation of the inner end of a retaining screw 117 extended inwardly through the wall of the boss 11 1, thereby. removably but slidingly holding the pin or rod 115 in the boss. On one end, rod or pin 115 carries a roller118 cotiperating with the face of'a cam 119 attached by means of t screw 120 and centering pin 121 to the'end of the shaft 122 on which the cylinder 25 is mounted. This pin 115 has 'a cayityj 123 on one side which receives and accommodates the foot or laterally-extended end 124 of a lever 125 fulcrumed at 126 and acted'iipon by a spring 127 attached to the leyr at one end and to the frame of the machine at the pivoted thereto at 128 ahohk member 129 other end. The upper end o f d ver'l25 has I hooking over or coacting with'a pin130re1Xf- 1s hook, near its central portion, has a straight, edge 131 adapted for cooperation with thetended laterally from the arm 90.

.armlOO disposed directly beneath it. A pin 115 projects fromfthe, side of the machine frameand acts to stop rod or pin 115 from sliding out ofaction from cam'119 and t 1 preventmember 109 from being pushed in when roller 118 is-ou't, of the cam. Theoperation of this partfof the mechanism 3 "takes place substantially as follows: The

- and 106 will be pushed-inwardly intooperative relation with the grippersti 'mbler 104 i only when the roller 118 is pushed up by the foot 124 on lever 125 into coactive relation with the cam face of cam 119. This is brought about, however, only at every other revolution of the feeder cylinder 25, Inas-' much as the pin 130 is fastened to and travels back and forth with the arm- 90, which is, oscillated by'means of the cam- 96 and the connecting rod 91, this pin, because of itsfengagement with the hook'129,,will

- shift. the pin or rod 115 and its roller 118v upwardly into operative engagement with the cam each time that the arm 90 is shifted tothe right as the parts are'v ewed. in Figs.

1 and 3, and every time that this is brought gripper tumbler.

sired'to prevent the gripping of a sheet. im-

about the pins 105 and 106 will be pushed inwardly into the ath of travel of the bviously, if it is, de-

' properly advanced to the gages on the feeder table, this may be done by causing the de-' tector fingers to prevent the inward sliding of the tumbler-actuating pin' 106, which operation would, of course, prevent the grippers fromclosing and prevent the cylinder from taking a sheet from the feed-table. This connection between the detector "fingers and the grippers. operates as follows: As vhas beennoted above, when the detectorfim ger's discover that a sheet has been improperly advanced on the feed table, the-arm 100' swings to the right as'the parts are viewed in Fig. 3, and in so doing its'endrides under the surface 131, raising the hook 129 out of engagement with. the pin 130,

' that is, this movement of the parts breaks the connection between the arm ,90, and the lei' er '125,so that the movement of the for:

mer is n'ottransmittedto the latterand the pin 115," the latter being retained-in dcpressed pd'sition with its'roller out of Lens *gageinent' with cam-119, the result being tionof "the pins 105 and 106 will continue so long as the arm 1-09 is maintained in elethat neither ofthe pins 105-,106 is pushed into tumbler-engaging position. This inacvated position, which will be as long as the detector fingers-discover trouble in the registration of the sheet ofpaper with the gages,

.or discover that no sheet at all hasbeenfed.

Consequently, an improperly-fed sheet will be retained on the table until it isproperlyregistered with the gages, for" thereason. that the grippers of the cylinder 25 willsnot take it away. 4

It is onef'of the obj ects of thisinvention to stop the feeding on both tables if thedetector fingers of either discover that no sheet has been fed orthat one has been fed 4 incorrectly, and in order 'to -establish this n'isms, or, viewed in another light, between the two cylinders 25 and 2G, thefollowing parts are employed: At the side of-the machine I rotatably mount in a pair of bearings 132 and 133 an upright shaft13-i (Figs.

'1, 3, 7 and 8), and on this shaft are fixed upper and lower sectors 135 and 136, each- 'lconnection'between the two detector mecha- 1 i equipped with a substantially central notch" or reoess 137, and in addition the shaft has fixed thereto a locking. ratchet ornotched' member. 138, with which, coacts a spring tongue 139 adapted to ride-over the projection between the notches and hold the shaft in5either one of two positions, As has been explained. hereinabove, when the detector fingers act, the rod 102 is'shifted to the left asthe parts are viewed in Figs. 1. and 8,

and each of these rods (that is, two for the upper and lower tables) has fastened thereto ablock 140, pivoted to which" is a. finger'or arm 141 carrying an upwardly-extended pin 142,; such arm being pressed toward the frame of thc1machine,:that is, toward the.

corresponding sector1'35-or 136,- by'a leaf. spring 143 Each detector'mechanism has the hub 1&4: of its bent arm 84 supplied with a sideprojection 145, it .beingremembered that .the hub H4: is either integral withior fixed to the sleeve 80, and the vertical shaft 134 has fastenedthereto two "arms .146. ;and

i the path of travel of the two projections'145',

14'? adapted to be swung simultaneously iinto Figs-.1, '3, 7 and 8( When, for example, the

detector Ifingers of. the'upper feed-tables are-f i i j arrested intheir; movement, that is, detect or discover an improperly-fed sheet, the rod 102 shifts-to the left, -and', in so traveling, theprojection 14.2 on the spring-pressed arm --as is perhaps more clearly illustrated" in 141' passes into .the notch 137 and acts throughthe sector 136 to rock the shaft 131 so as to bring both of'therarms 146 and 147 into the plane oftheir coactin arms 1 15, Assuming that the fingers of the upper feedtable have detected a sheet impro erlyfed,

this swinging of the arm 14,7 into t r 6 Path of 3 about the. disengagement of the "hook 129' from the pin 130 of the lower detector mechanism, which results in rendering the gripper fingers of the lower cylinder 26inoperative to feed the sheet to the cylinder 22. If, on the other hand, the fingers of the lower feed-table had discovered an improperlyplaced sheet, the movement of the shaft 134 would bring the arm 1 16 under the projection 145 and. prevent further feeding of sheets from the upper table, so that if the feeding is not proper on either table the feeding is stopped from both tables, and at the same time, owing to the movement of the rods 102, the feeding of the sheets from the piles upon the two tables is stopped, the two hooks 62 and 67 being moved, as has been described above, so as to prevent the descentof the rollers 36 into paper-engaging position. Consequently no 'sheets will be fed to the tables and no sheets will be fed from the tables to the cylinders 25 and 26 until the cause of the trouble has been removed, and then to start themechanism into operation again it is necessary for the person having the machine in charge to shift the handle 59 to the right as the parts are viewed in Fig. 1, so as to cause an engagement of the hooks 62 and 67 with their coacting parts to maintain the fingers 56 in elevated position. Since this hooking engagement for the two hooks cannot occur simultaneously, the sliding connection between the rod 72 and the block 74 is provided. when thetwo rods 102 shift to the right, they move their sectors 135 and 136 in the same direction by means of the arms 141. and rock the shaft 134 and arms 146 and 147 into normal inop erative position.

\Vhen the detector fingers act because of the discovery of an improperly-fed sheet, it is desirable to throw the impression cylinder oil of impression, regardless of whether the improperlyl sheet is on one table or the other. or tn o sheets improperly advanced onto the feed tables simultaneously. To accomplish this result. I employ the mechanism illustrated in Fig. 2, which is located at the opposite side of the machine from that part f the construction shown in the other figures. Each bearing block 150 for the shaft of the impression cylinder 22 is slidably' mounted in the frame of the machine toward and away from the form cylinder 33 by tween which andt e correspondin bearin means ofa slightl eccentric shaft 151 beblock 150 there is interposed a saddlei 152;

this shaft having also, integral therewith or fixed thereto, an arm 153 connected by a link 154 to onearm 155 of a double-armed member 156 fulcrumedat 157, the other arm- 158 of suchmember having pivoted thereon at 159 a double-ended pawl 160. Also oscillatory about the center 157 I use a notched or ratchet member 156 provided. on its periphery with a, recess havingvat its ends the twooppositely-facing shoulders 161 and 162',

a projecting arm 163 of the member 156 carrying a roller 164traveling in a cam groove 165 of a suitably-rotated cam 166 geared in any approved manner to theoperating mechanism of. the press so as to revolve about its axis. 167 one revolution for each half revolution of the double-impres sion cylinder 22.

In order to oscillate the shaft 159 having fixed thereto the double-ended pawl 160 so asto obtain an operative connection to throw the impression cylinder off of and on to impression, I employ in combination the following elements: At.168;I fulcrum a-lever 169 'counterweighted at 170 and provided with a notched projection-171 coiiperating with which is a fixed leaf spring 172 to 'hold the lever in eitherone of two positions. A rod 173 is pivoted to the lever 169 at 174 and extends through an apertured boss 175 on an arm 176 fast onshaft 159. Fixed to the rod I use two collars 177 and 178, and employ between the collars and the boss 17 5 the two coiled expansion springs 179 and 180,

which act normallyto center the pawl 160,

of support 181 by means of a link 188 pivoted to the fork at 189, and at 190 to an arm 191 fixed on the upper detector shaft 79. The lower fork 183 is correspondingly associated and connected to an arm 192 fastened to'the lower detector shaft 79 by means of a similar link 193. e

The shaft 21 of the impression cylinder 22 carries a cam 194: having in its face a-camgroove 195, and pivoted to any suitable support at 196a bell crank 197 is used, one arm of which has a roller 198 traveling in the cam groove .195, while the other arm has pivoted at 199 a pawl or dog 200. equipped at its opposite sides with oppositely-facing teeth \orshoulders 2 01 and. the; vertiiiu.

cal plane of the fork 182, this'jp'awlQor jdog being normally held incentral position by a bowed leaf-spring- 203; Also the 'con'stru'c 'l tion" contemplates the -'e'mploy1nent' of' a I largr bell crank 204 fulcrumed'fat: 2Q 5,one arm otthesame having ,a'- "roller 206 coiSpcrating with the cam slot 195,.the other arm having a spring-controlled pawl 20? with the opposite teeth or shoulders 268 and 209,"-

such pawl'being adapted gfor'direct associa- .tion with the upper bifurcated end of the fork 183, as is clearly illustratedin- Fig. 2. 4

If the. detector fingers 82' of the upper table discover or detect the fact that a sheet of paper has been improperly fedor no sheet has been advanced whenit' should have been fed, the movement of such fingers --willbe arrested, as has been explained above, bringing about the oscillation of the upper-de-- tector shaft 7 9 and the swinging of the arm 191 in the counter-clockwise direction-as the parts are viewed in Fig. 2. The result of 7 this action is that, through'fthe instrumentality ofthe connecting link 188, the fork '182is swung to the lefit, bringing the 'shoul der'187 into the path of trave of-theMt-ooth or shoulder'202, which tantlyllfecip- .rocated up and downbecause-of the rocking. of the bell crank on which it is mounted by the cam groove 195. During the upward strokeor travel of the pawl 200, under these circumstances, its shoulder or tooth 202 en-- gages. the shoulder 187,; carrying the fork 182 upwardly "with th e-v pawl, which, of course, swings the lever 1169 on its fulcrum 168, pushing the m1 173"toward the right.

Such movementof the rodoscillates the-pawl 160 bringing its left-hand end into the path of travel of the shoulder 162, and as soon as such shoulder engages the pawl, it being understood that-the'member 156 on which.

theshoulder 162 is formed is constantly oscillated by the cam.'165, thedouble-armed member 156 will be swunguto the right, the link 154 will be pushed up, the shaft. 153 will be rocked, and the bearings of the shaft 21 on which the impression cylinder is mounted will be lowered, shifting the impression cylinder into oif-impression position. The cylinder will stay off of impressionuntilthe defect in the feeding of the sheets of paper has been remedied, and when this occurs the arm 191 will rock to the right,

and by 'means'of link 188 will push-the shoulder 186 into the path of travel of the tooth or shoulder 201, and when the pawl 200 descends by the coiiperationof these two shoulders, the fork 182 will be pushed down,v rocking the lever 169 around its fulcrumagainst the action ofthe counterweight- 170. which movement will swing the other end ofv "the double pawl 160 into the field of action or path of travel of the shoulder 161, and

adaptedto' hold the lever 169 either in the 'normal positiom-show'n in Fig; 2,, withT-t-he' cylinder onimpresslon, or in the pos1t1on of the'parts'assumed'avhenthe cylinder is off ofi'mpressioni Erom the above it should be quite clear that a corresponding action a will take place if thedetectorfingers' of the lower table discover an impro 'aerly-fed sheet, so that if either detector mechanism is 5 vope'rate d,.the cylinder will be thrown. off of impressionand maintainedofi" of implies sion It should befapparent from'the above that mechanism engage the .recesses'of the tongues until thedefect in the feeding is re-me ifthe. detector fingers of either detect-or beneath them because, a sheet is improperly fed'to the gages,'or due-.toqthe factth'at no sheet is fed, then the other detector Im'echa-= nism will besimilarl'y operated-through the .mediumof the shaftr134 and. associated parts. Also 'the' gripper operating mechanisms ofboth of the transfer cylinders 25 I and 26, whichlfeed the sheets fromthe ta- U blesto the common impression cylinder, will be unclutched. from their actuating mechanism, so that no sheets will begripped by 'eitherof these cylinders Furthermore, both rollers 36 of the two tables will be rendered inoperative to feed sheets-from the piles tojthe corresponding tables, and the impression cylinder will be thrown ofi of impression and maintained 'ofi" of impression remedied and the machine again set into.op erat-ion by the manipulation of the handle 59.

.until the trouble with the feeding has been I lVhile I' have herein setforth and described. with some degree of particularity the features of construction and operation of a preferred and desirable embodiment of the inventi0n,'it should he understood that the latter is not limited and restricted to these precise and exact details, because the inventionQis susceptible of embodiment inmany different forms, and the mechanical features of the device herein described may be varied within wide limits without'departiu-e from the substance of theinvention.

'Iclaim: i

1. In a printing press, the combination with an impression cylinder 10f a plurality of feed tables therefor, a detectorfor eachtable, and-means to actuate one dffs'aid dctectors so as to stop feeding withoutstop- I tially as described.

ping the press when the other detects a defeet in the feeding of its sheets, substan- 2. In a printing press, thevcombination with an impression cylinder of a pair of feed tables therefor, a detector for each table, and a connection between the detectors. whereby to actuate the companion detector so as to stop feeding without stopping the press when either of the detectors detects a defect in the feeding of its sheets of paper, substantially as described.

3. In a printing ress, the combination of a plurality of feed tables, detector fingers for each of said tables, means to reciprocate said detector fingers, means to arrest the movement of said detector fingers if the feeding of the sheets of paper thereto is defective, and means to arrest the movement of the detector fingers of all of the remaining tables if'the detector fingers Of. anyiable are' arrested in their movement because of -im-'- proper sheet feeding, substantially as described. 7

4. In a printing press, the combination with an impression cylinder of a plurality of feed tables therefor, means to remove the sheets from each of said tables, a detector for each of said tables, and means connecting the several detectors whereby to render all Copies of this patent maybe obtained for five cents of said paper-removing means inoperative without stopping the press when any of said detectors discovers a defect in the feeding of its sheets scribed.

5. In a printing press, the combination of a pair of feed tables, a feed cylinder for each of said tables to remove the sheets therefrom, a detector for each of said tables, and means to render both of said feed cylinders inoperative if either detector discovers a defeet in the feeding of its sheets of paper, substantially as described.

6. In a printing press, the combination of animpression cylinder, a plurality of feed tables, a feed cylinder for each of said tables to remove the sheets therefrom and deliver them to said cylinder, means to feed sheets of paper to each of said tables, a detector for each of said tables, and means to of paper, substantially as detrip said cylinder off of impression and to "render all of said feed cylinders and means to; feed the sheets to said tables inoperative if any of the detectors discovers a defect in the feeding of its sheets of paper, substan' tially as described.

SIVERT MOE. 'Witnesses:

WALTER M. FULLER, C. I. MANSUR.

each, by addressing the Commissioner of Patents,

Washington, 1). C.

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