US1181581A - Automatic trip for printing-presses. - Google Patents

Description

NI. A. DROITCOUR.

AUTOMATIC` TRIP FOR PRINTING PRESSES. APPLICATION FILED Nov. 27. 1914.

l 9 l 8 1 ,58 1 Patent-ed May 2, 1916.

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IVI. A. DROITCOUR.

AUTOMATIC TRIP FOR PRINTING PRESSES.

APPLICATION FILED N0V427I1914.

Patented May 2, 1916.

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AUTOMATIC TRIP FOR PRINTING-PRESSES.

Speciicatioil of Letters Patent.

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Application led November 27, 1914, Serial No. 874,273.

To all u1/1.0m z'trmay concern:

Be it known that I, MICHAEL A. DROIT- coun, a citizen of the United States, and a resident of Delphos, in the count-y of Van' Vert and State' of Ohio, have invented a certain new and useful Automatic Trip for Printing-Presses; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in 'the art to which it appertains to make and use the same, reference being hadI tothe accompanying drawings, and to thev characters of reference marked thereon, which form a part of this specification,

My inventionl relates to printing presses or the like, and particularly to automatic trip means therefor.

The primary object of my invention is the provision, in combination With the trip mechanism of a printing press, of simple and efficienty means which' is automatically operable to trip such -mechanism upon the failure to feed a sheet to be printed into position to be gripped by the gripping means of the press. y

Other objects and advantages ofv the invention will be apparent from the following detailed description thereof. v

The invention is fully described in the following specification, and while, in its broader aspect, it is capable of elnbodiment in numerous forms, a preferred embodiment thereof is illustrated in the accompanying drawings, in Which,-

Figure 1 is 'a plan View of a portion of the printing press embodying my invention with a sheet fed into gripping position. Fig. 2 is an enlarged side elevation of the upper portionthereof with parts broken away. Fig. 3 is a similar'side elevation of the invention and the portion of the machine with w'hich it is associated including the connection of the same with the trip mechanism. Fig. 4 is an enlarged rear ele-l vation of the left end portion of Fig. 1 looking in thedirection of the arrow (L, and Fig.r5 is a partial enlarged section on the line zr. :a in Fig. 1.

Referring to the drawings. 1 designates a press frame` and 2 the customary platen cylinder. which is carried by a shaft 3, the ends of which are journaled in bearing blocks 4. mounted for vertical movements in the respective side portions of the frame lintervals torst obstruct to permit vertical movements of the cylinder to place it int and out of operative printing posltion.

5 designates the foottrip lever of a trip mechanism which is operable upon a depression of said lever to effect a throwing out of the cylinder lowering mechanism to prevent the taking of an impression. Numerous forms of trip mechanisms are employed, and as the invention does not reside in the form of such mechanism, the same is not shown herein. It will be sufficient for an understanding of the present invention to refer to the part 5 as the trip mechanism, as its connection with the cylinder by one mechanism or another is well understood in the art.

Mounted over the cylinder 2 in bearing brackets 6, 6, rising from the respective frame sides, is a rock-shaft 7, which carries the customary gage lingers 8 for the sheets 9. When the gage fingers 8 are in sheet obstructing position they .rest on fingers 10a projecting from the forward edge portions of the feed table 10 of the press, and said gage fingers are rocked at predetermined the passage of a sheet over the table and then to free it, as is well understood in the art, by a rocking of the shaft 7, such rocking being effected lby any suitable mechanism, a part of Which is shown at 11 at the right of Fig. 1.

Mounted, in the present instance, in advance of the shaft 7 is a rock-shaft 12, which is rotatably supported at its ends by pin bearings 13 and 14, the bearing 13 being adjustably carried by the right hand bearing bracket 6, and the bearing 14 comprising a rock-shaft which is journaled in bearing arms projecting from a bearing bracket 15 rising from the left hand side of the press frame. The rock-shaft 14 has the endthereotl adjacent to the shaft 12 pointed to form a pin point bearing for said'shaft and` carries rocker- arms 16 and 17 at the outer and inner ends thereof, respectively, which arms coact with the bearing arms for said shaft to prevent endwise movement thereof. A spring detector finger 1 8 projects rearwardly from the rock-shaft 12, at its center portion, in the present instance, and when such linger islowered as hereinafter described, the free end thereof rests upon a sheet 9, which has been fed to the guides 8 and if a sheet is not in position l a registering opening 19 in a registering ing upward from the inner end of the dog,

table finger 10b and effects an automatic tripping of the cylindei tlirow-out oi trip mechanism. as hereinafter described.

Projecting forward from the left-hand end of the rock-shaft 12 is a dog 20 the nose of which coacts with the upper end of a spring pressed lever or arm 21. b otli when the detector finger 18 rests on the sheet 9 and when it is raised therefrom, the dog being moved to entirely release the arm 21 only when the detector finger 18 passes down into or through the table opening 19.

The arm 21 is fixed to a lrock-shaft 22 that is journaled in the bearing bracket 15, and an arm 23 projects downward from said shaft and is provided with an eye at its lower end through which the free end of a horizontally disposed rod 24 loosely pro- 'ects, the opposite end of said rod being pivoted for vertical swinging movements to the frame side, as at 24a. A coiled compression spring 25 is mounted on the rod 24 intermediate the arm 23 and a stop pin or `inember 2G on the rod. thereby exerting a pressure on the arm 23 which tends to force the arm 21 into coaction with the dog 20 and toward the shaft 12.

The arm 16 which projects from the outer end portion of the shaft 14 cariies at its free end a roller 27. which rides on a. cam 28 that is fixed to a shaft 29, which shaft is journaled ina bracket arm 30 rising from the outer side ofy the respective bearing block 4. A gear 31 on an end of the c vlinder shaft 3 meshes with and drives a larger gear 32 on the cam shaft 29, said gears being so proportioned that the shaft 29 makes one revolution to each two revolutions of the cylinder 2. The cam 28 is provided in its periphery with a depression or recess 28L into which the roller 27 diops at each revolution of the cam 28 to effect a rocking of the shaft 14. The passing of the roller 27 into the cam depression 28a is timed to take place immediately after each sheet 9. when properly feeding, moves into contact with the gage fingers 8. Project- 20 is a pin 33. When the roller 27 is riding on the raised or neutral portion of the cam 28, a pin 34. which projects from the arm 17 engages the pin 33 and retains the rock-shaft 12 in position to elevate the detector-finger 18 above the table 10 and to retain the nose of the dog 20 in engagement with the lever 21. into the cam recess 28a the pin 34 is swung rearward to release the pin 33 and to permit the finger 18 to swing downward by gravity into sheet coacting position. and, if a sheet ,is not in finger obstructing position. to then swing downward through the opening 19 a 'Vhen the roller 27 drops sufficient extent to rock the nose of the dog 20 out of engagement with the arm 21.

An arm 35 fixedly projects from the shaft 22 and carries a roller 36 at its free end for riding on the peripheryvof a cani 3T. which is fixedly carried by the shaft 29 at one side of' the cam 28. The cam 3T is provided in its periphery with a depression 3T:L into which the roller 3G may drop at a predetermined point in a revolution of the shaft 29 if the arm 21 is free to swing under the action of the spring` 25 by reason of the dog 2() being rocked to unobstructing position. which only occurs when the detector finger 18 lowers and there is no sheet in position to arrest its lowering movement. The arm 35 is provided at its` inner end with a wiper nose or extension 38, which upon a rocking of the arm, due to its roller dropping into the cam recess 3T, coacts with and forces the upper end of a catcli-bar 39 from catch engagement with a stationary catch or shoulder 40 on the press frame. The catch bar 39 extends downwardly from the catch 40, being guided for vertical movements by a guide member 41projecting from the frame, and has its lower end pivotally connected to vthe forward end of a horizontally-disposed` lever 42. which extends over the foot lever 5 and is pivoted to the frame, as at 43. The lever 42 has a link 44 pivotally depending therefrom in advance of its fulcrum 43 and provided at its lower end with a vertical slot 45. which receives a pin 46 projecting from a side of the foot trip lever vhen the trip lever 5 isin its normal or raised position, the upper end wall of the link slot 45 bears downward against the pin 46 so that said trip lever 5 will be lowered upon the release of the catch bar 39 from the catch shoulder 40 and a downward movement of the lever 42, thereby operating the cylinder trip mechanism to raise the cylinder from operative position. The downward movement of the catch bar 39 and lever 42 are urged by a coiled contractile spring 4T, which connects the frame and catch bar in a manner to cause a constant downward pulling action on the catch bar. The rear end of the lever 42 is extended rearwardly from the fulcrum 43 to enable the exertion of foot or other downward pressure on such end of the lever to effect a raising of the forward end of the lever 42 and a consequent restoring of the catch bar 39 to its catch engagement with the catch member 40. thus l again placing the trip mechanism embodying my invention in operative position.

It willv be understood in the operation of my invention that a sheet 9 is gripped by the cylinder gripping means at every other revolution of the cylinder, and that the cams 28 and 37 are geared to make a single revolution for each two revolutions of the cylinder; and also that the cam recess 28 in the cam 28 is positioned to permit a lowering of the detector finger 18 into sheet engaging' position immediately after each sheet 9 is or should have been fed into coaction with the gage-fingers 8, and that the cam depression 37a in the cam 37 is positioned to permit a `dropping of the roll 36 therein and a consequent tripping of the cylinder trip mechanism at the in a cycle of operations of the press. Should a sheet be missed in the feeding action, the detector finger 18 will be permitted to pass through the opening 19 in the table finger 10b, thus effecting a sufficient upward rocking of the dog 2O to move it out of register with the arm 21 and permitting the roller 36 to be forced into the cam depression 37a by the action of the spring 25 when said cam depression is moved into register with the roller. The rocking of the arms or lever parts which are carried by the shaft 22, which rocking is effected upon the movement of the roller 36 into the cam depression 37a causes a kicking of the catch bar 89V from catch" engagement with the stationary catch 40, thus permitting said catch bar and the forward end .of the lever 42 to lower under the action of the spring l17 and to force-the trip -lever 5 downward to tripping position. It will be understood that the detector finger 18 lowers within the peripheral opening of the cylinder., and the raising of such finger takes place in time to prevent an interference or clashing of the finger and cylinder.

I wish it understood that my invention is not limited to any specific construction, arrangement or form of the parts except in so far as such limitations arespecified in the claims.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is,--

1. The combination with a cylinder trip mechanism of a printing press, of a rocker member carried independently of the press cylinder and movable into and outof sheet coacting position and movable beyond such position when the feeding of a sheet in proper order is missed, means operable to periodically raise said member from sheet coacting position and then to release it to permit an automatic lowering thereof to sheet coacting position or beyond the same, means automatically operable to trip said mechanism, and a part ,for coaxial rocking movements with said member and coacting with said mechanism tripping means to prevent tripping movements thereof except when said member has moved beyond sheet gripping position.

` In a printing press, the combination with a movable sheet picking up part to which sheets are intermittently fed, and a trip mechanism for the press,-of a member proper tripping period.

vertically movable into and out of sheet coacting position when sheets are at a predef termined point in their feeding movements and prior to being engaged by said part, said member having an abnormal movement when its movement in one direction is not stopped by a sheet, means-operable to control the movements of said member, means having connection with and operable to trip said mechanism, a part fixedly attached to and movable with said member and coacting with said trip meansto prevent tripping movements thereof except when the member has moved to abnormal position, and means coperating with said trip means to prevent tripping movements thereof except at a predetermined point in a cycle of operations of the press. l

3. In a printing press, the combination with a cylinder, and a trip mechanism therefor, of a member separate from said cylinder mounted for rocking` movements and normally movable lto sheet coacting position and beyond such position if the movement of the member is not obstructed by a sheet, means having a operable to periodically move said member from sheet coacting position, meanshaving connection with said member and automatically operable to effect a tripping of said mechanism upon a movement of said member beyond sheet coacting position, and means having a rotatable control part and operable to permit mechanism tripping movements of said tripping means to take place at a predetermined point only in a cycle of operations of the press.

Inv a printing press, the combination with a cylinder, and a trip mechanism therefor, of a catch part, means for catch engagement with said part and operable upon its release from the part to effect a tripping action of said mechanism, means operable to effect a release of said catch means from said part at a predetermined point in a cycle of operations of the press, and means normally locking said release means against movement and having a sheet-feed detector part and being operable to release said release means upon the missing of the feeding ofeach'sheet in proper order to the cylinder.

5. In a printing press, the combination with a cylinder, and 'a trip'mchanism therefor, of rotary cam means, trip means having a part for coaction with said means and operable at a predetermined point in a movement of said cam means to effect a tripping of said mechanism, and means having a rocker part periodically movable into and out of sheet Vcoacting position and beyond such position when its movement is not obstructed by a sheet, said last means having locking connection with said trip means except when said part has movedlbeyondsheet coacting position,

rotatable control part and ingl locked thereby against catch releasing' Amovement except when said first rocker rocking movements 6. Ir a printing press, the combination with a cylinder, and a trip mechanism therefor, of mechanism having a rotary control part operable to effect a tripping of said trip mechanisml at a predetermined point in a cycle of operations of the press, rocker means carried independently of said cylinder normally locking said second mechanism in inoperative position and automatically operable to release said second mechanism .upon a missing in the feeding of a sheet in proper order to the cylinder, and means operable to impart predetermined rocking movements to said rocker means.

7. In a printing press, the combination with a cylinder and a trip mechanism therefor, of rocker means having a finger movable into and out of sheet coacting position and beyond said position when not obstructed by a sheet, control means for said rocker means periodically operable during a running ofthe press to impart predetermined to said rocker means, a stationary catch-part, catch means adapted to engage said catch part and being operable when released from said catch' part to effect a tripping of'said trip mechanism, a second rockenmeans Which is normally urged to coact with land move said catch means from yengagement with said catch part, said second rocker means having connectionl with said first rocker means and bemeans has moved beyond sheet coacting position, and cam means coacting with said second rocker means to prevent a catch releasing movement thereof until a predetermined point in a cycle of operations of the press has been reached. A i

8. In a printing press, the combination with a cylinder, and a trip mechanism therefor, of a rock shaft carried independently of said cylinder, a detector linger projecting from said shaft and normally movable into position to coact with a sheet when in cylinder gripping position and to have abnormal movement beyond such position when a feeding of a sheet is missed, means periodically operable to rock said shaft to raise the finger from sheet coacting position and then to release the shaft, rocker means normally movable in one direction, means locking said rocker means against movement from normal position of its movement and operated to release the same upon an abnormal movement of said finger, means coacting with said rocker means to prevent a movement thereof from its locked position until a predetermined point in a cycle of op,

erations of the press has been reached, and

means whichl is rendered operable by a movement of said rocker means from ,locked position to effect a tripping of said mechanism. 9. In il machine of the class described, the

speed with respect to combination with a trip mechanism therefor, of rocker means having a stationary axis and having a detector finger movable into and out of position to coact with articles when at rest and in position to be picked up by the machine for subsequent operation, said member having an abnormal movement upon the failure in feeding of an article in proper order to the machine, a locking finger carried by-said rocker means for rocking movements therewith, means operable to periodically impart predetermined rocking movements to `said rocker means, and a control mechanism for said trip mechanism, said control mechanism being normally locked against trip releasing movements by said lock finger and being released upon an abnormal movement of said detector finger. l0. In a printing press, the combination with a cylinder trip mechanism, of a rock shaft having a lock finger and a detector finger projecting therefrom, the detector finger serving to limit the rocking movements of the shaft in one direction by contact with a sheet disposed in cylinder picking up position, means periodically operable to rock said shaft in one direction to effect a raising of the detector finger and then to release the shaft to permit a lowering movement of the detector finger into sheet coacting position, and means operable to trip said mechanism, said last mentioned means being normally locked against mechanism tripping movement by said lock'finger and released upon a movement of the detector finger beyond sheet coacting position.

11. Ina printing press, a. cylinder, a trip mechanism for the cylinder, rocker means having a detector finger'an'd a lockV finger, the rocking movements of said means in one direction being limited by ,contact of the detector finger with a 'sheetlwhen in cylinder picking up position,:cam'ricontrolled means periodically operablef` to;I rock said rocker means in one direction and then to release it to permit a movementvl of the detector finger to sheet coacting position and past such position if not obstructed by a sheet, a second rocker means urged to have rocker movements in one direction to effect a tripping of said trip mechanism and prevented from movement in such direction by the lock finger of said first rocker means except when the detector finger of said first rocker means has moved past sheet coacting position in a sheet detecting movement thereof.

12. In a printing press, the combination with a cylinder. and a trip mechanism therefor, of a pair of rotating cams, means for driving said cams at a predetermined the rotation of the cylinder, rocker means having a detector finger for coacting with a sheet when in cylinder picking up position to limit the rocking movements 0f said means in one direction, means coacting with and operated by one of said cams 'to intermittently rock said rocker means in one direction and then to release it to permit a movement of the detector linger to sheet coacting position, releasing means for said trip mechanism normally urged to have mechanism releasing movements and coacting with said other cam and with said rocker means whereby it is prevented from movement in the direction from which it is urged until the coacting cam has' reached a predetermined point in a revolution thereof and until the detector finger of said rocker means has moved past sheet coaeting position.

13. In a printing press, the 'combination with a cylinder, and a trip mechanism therefor, of a rock shaft having a detector linger and a lock finger projected therefrom, the detector finger being .adapted to coaci with a sheet when in cylinder picking up position to limit the rocking movements' in one direction of said shaft and to permit abnormal rocking movements of the shaft when the movement of the detectorl finger is not stopped by a sheet', cam controlled means periodically operable to rock said slaft and fingers in one direction and then to release them to permit a return .thereof tonormal sheet coacting position, rocker 'means normally locked against rocking movements in one direction by said locking linger, means urging a movement of said rocker means in lthe direction vin which it is locked by said lock finger, a cam coacting with said rocker means and operable to prevent the rocking movement thereof except at a predetermined point in a cycle `of operations of the press, said lock finger being moved to release said rocker means by a movement of the detector finger past sheet coacting position in a sheet detecting movement thereof, and "said rocker means beingoperable when released to effect a tripping of said mechanism.

In testimony whereof, l have hereunto signed Amy name to this speciication in the presence of two subscribing Witnesses.

MICHAELV A. DRITCOUR. `Witnessesz` M; F. Weens, N. A. Wmmms

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