US686376A - Tripping mechanism for cylinder printing-machines. - Google Patents

Description

N0. 686,376. Patenred Nov. I27 I90I.

i .1. WHITE. TRIPPING MECHANISMFOR CYLINDER PRINTING MACHINES.

(Application led Dec. 14, 1900.) (No Model.) 3 Sheeis-Sheef I.

lllu IIIIH I Emi @pui ll III t 13u/anim I No. 685,376. Patentd Nob. l2, |901.

J. WHITE.

TRIPPING MEGHANISM FOR CYLINDER PRINTING MACHINES.

(Application led Dec. 14, 1900.) Y (No Mmm.; I 3 Smets-sheet 2.

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No. 686,376. Patented Nov. I2, 190|.

' J. WHITE.

TRIPPING'MEGHANISM FOR CYLINDER PRINTING MACHINES.

Y I (Application led Dec. 14, 1900.) (No Nudel.) 3 sheets-sheet 3.Y

IM 2 G 2 7 M 2 2 a, i 2 6 nu -m n .I MI h Il@ m, Of ,af/--.T2 ,4 I@ 4 8 e la a I 0 3 w H a M n0l 2 3 .M n l I l 1I e y wd 2 7 M m fer` 1 UNTTED STATES PATENT OFFICE.

JOSEPH-WHITE, OENEW YORK, N. Y.,lAss1GNoR To ROBERT HOE, OE NEW YORK, N r. i y

TRIPPlN-c M EC'HANISM FOR-,CYLINDER PRINTING-MACHINES.

` SPECIFICATION forming part of Letters Patent No. 686,376, dated November 12, 1901.

V i Y Application tiled lJecember 14, 1900. Serial No. 39,815. (Nomodel i To @ZZ whom, it may concern: tripping mechanism throws the positioning Be itknown thatI, JOSEPH WHITE,acitizen devices into'operation; but in the bed-andof the United States, residing at New York, cylinder type ot machines the tripping mechcounty of New York, and State of New York, anism suspends the operation of the position- 55 have invented certain new and useful Iming devices. These tripping devices as ordiprovements in Tripping Mechanism for Bednarily constructed embodyconnections which and-,Cylinder Printing-Machines, fully deare engaged or disengaged, as the case may scribed and` represented in the following be, and the work incident to the tripping opspeciication and the accompanyingdrawings, eration is performed entirely by the operator 6o 1o forming apart of the same. l orpressinan. Furthermore, the tripping op- This invention relates to certain improveeration should only be effected at certain ments in tripping mechanism for printingspecified times inthe operation of the mainachines. I chine-that is, in bed-and-cylinder machines,

Printing-machines as now7 ordinarily con- `for instance, when'thebed has passed out 65 15 structed are usually provided with mechanfrom under the cylinder, since to bring the isms which so position one of themembers `bed and cylinder intoprinting positionat any of the printing-couple as to prevent it from other time would` cause breakage of the macoperating with the other member under chine or unnecessary strain on its parts. In certain conditions, this positioning taking the best constructions, therefore, means are 7o zo place without interfering with the operation provided which absolutely prevent the operaof the machine as a whole. In rotary mation of the tripping mechanism except when chines and incertain machines of the bedthe bed and cylinder are in proper position. andcylindertype-as, forinstance, machines It follows, therefore, that the time during employing multirevolution-cylinders and in which the tripping can be eiected is a limited 75 25 certain classes of stop-'cylinder machinesone, and it will sometimes happen that the the positioning devices operate to move one operator is unable to succeed in completing of the members of the couple, usually the'imthe movement of .the tripping mechanism pression-cylinder, away from its coperating within this timo, so that breakage of the mamember. In another class ot'bed-and-cylinchine results. 3c der machines, which includes the stop-cylin In certain classes of machines it has been der machines, in which the impression-cylin proposed to employ a mechanism by which der hasa low side or a properly-arranged gap, the operator can set the tripping mechanism, the positioning devices operate to bring the leaving the actual work of trippingto be efcylinder to a stop with its low side or its gap, fected by the machine. These mechanisms, 85 3; as the case may be, opposite the bed,'so`that however, have not included a mechanism for `the form on the bed may pass under the cylpreventing the operation of the tripping deinder without touching it. In rotary mavices except at specified times and are obchines the positioning devices are usually enijectionable for that reason. ployed during the time of inking up or when It is one of the objects of this invention to 9o 4o an emergency occurs-such, for instance, as produce an improved means for controlling failure to properly feed a sheet--and are inthe positioning devices of printing-machines operative at other times. In the bed-and` in` which the tripping operation shall be efcylinder type of machines the positioning defected by the machine and in whichthe tripvices usually operatel once during each cycle ping devices cannot be operated except at 95 45 of operations of the machine," and their op specified times.

eration is intermitted when the cylinder is A further object of the invention is to proout of printing relation with the bed in order duce an improved tripping mechanism in to keep the cylinder in this position. In all which breakage shall be prevented in case of these types of machines the positioning deany failure to complete the movement of the Ion 5o vices are cont-rolled through a tripping mechtripping devices within the time allowed for anism. In the rotary type of machines this their operation.

tion.

With these and other objects in view the invention consist-s in certain constructions and in certain parts, improvement-s, and combinations, as will be hereinafter fully described and then specifically set forth in the claims hereunto appended.

In the accompanying drawings,wl1ich form a part of this specification, and in which like characters of reference indicate the same parts, Figure 1 is a detail side elevation of so much of a bed-and-cylinder printing-machine as is necessary to illustrate the inven- Figs. 2, 3, and 4 are views similar to Fig. 1, but showing the parts of the mechanism in different positions. Fig. 5 is a view of a part of the mechanism shown in Fig. 1, on an enlarged scale, the view being partly in section and showing the parts in a still dierent position from those of the other iigures. Fig. 6 is a horizontal section on the line 6 6 of Fig. 2. Fig. '7 is ahorizontal sec- `tion on the line 7 7 of Fig. 5.

Referring to the drawings, the invention is shown as applied to a bedand-cylinder machine of the type in which the positioning devices operate to move the cylinder toward and away from the bed for each reciprocation of the bed. The frame of the machine, which may be of any usual or desired construction, .is indicated at 1. The frame (see Fig. 2) is provided with the usual standards 2, in which are mounted the boxes 3, which support the cylindershaft 4. Vhile any usual or desired type of positioning devices may be employed, in the construction shown the boxes have connected to them rods 5,which at their lower ends carry cross-bars 6. A shaft 7, which extends across the machine, rests in bearings in these cross-bars, said shaft being provided on each side of the machine with togglearms 8, which coperate with similar arms 9, journaled on studs 10, mounted in the sides of the frame. Springs 11, which rest against the boxes and against suitable bearings in the frame, are provided, which act in opposition to the toggles before referred to. In this type of positioning devices, which is a common one, when the toggles are broken the springs lift the boxes and carry the cylinder away from the bed. When, on the other hand, the toggles are straightened, the cylinder is brought down into printing position against the stress of the springs. Vhile any suitable means may be provided for breaking and straightening the toggles, in the construction shown the shaft 7 is provided with arms 12, to which is secured, by means of a pin 13 or in any other suitable manner, a gab-hook 14. This hook engages a pin 15, which is carried on a rock-arm 16, journaled in a bearing 17, secured to the machine-frame. It is apparent that by rockingthe arm a reciprocating movement of the gab-hook will be produced, which movement will make and break the toggles.

The means for rocking the arm 16 in the form of construction selected to illustrate the saev invention consists of a disk 18, provided with a cam-groove 19, said disk being mounted on a shaft 20, which is suitably located in bearings in the frame. This shaft is so geared as to make one revolution for each complete reciprocation ofthe bed, or, if the cylinder be a tworevolution cylinder, one revolution for each two revolutions of the cylinder. The rock-arm 16 is provided with a bowl 2l, which engages the cam-groove 19, before referred to.

The construction so far described is a common and ordinary form of operating'mechanism. When the gab -hook is engaging the stud 15, it is obvious that the positioning devices will be operated once for each complete revolution of the shaft 20. When, as in the present instance, the positioning devices are raising and lowering devices and the shaft 2O is arranged to make a revolution for each reciprocation of the bed, the cylinder will be raised and lowered once for each such reciprocation. Normally, therefore, when the present class of positioning devices is employed the cylinder will be regularly raised and lowered.

In order to interrupt the normal condition of the positioning devices, a controlling mech- -anism is employed which may be variously constructed and which will vary in its operation according to the particular function to be discharged by it. Vhen positioning devices such as have been before described and which normally operate to raise and lower the cylinder are employed, thecontrolling mechanism will be arranged to interrupt the connections by which the positioning devices are operated. In the form of construction which has been chosen to illustrate the invention the controlling mechanism consists of a bellcrank lever having arms 22 23, said lever being pivoted at 24 to the frame of the machine. The arm 22 of the lever preferably carries a lifting-pin 25, said pin being arranged to lift the gab-hook. In the preferred form of the construction the gab-hook is provided with an angle wear-plate 26, which is bolted to the hook, the pin 25 taking under the edge of the plate. In constructions like the one which has been chosen to illustrate the invention the controller-lever will preferably be operated by a moving part of the machine and is normally positioned so as not to operate upon the connections leading to the positioning devices. Inasmuch, furthermore,'as it is important that the controller-lever should not operate except at specified times in the operation of the machine, means are provided which will prevent the movement of the lever except at the time when the positioning devices may be safely operated. The means for preventing the movement of the lever except at specified times may be varied widely in form. In the present construction, however, the disk 18 is provided with an annular guard 27, a space being left between the ends of this guard. The arm 22 of the controller-lever is provided with a roller 28, and the parts are IOO IIC

-arm 23 of the controller-lever.

so arranged that when the controller-lever is in itspinoperative position the roller 28 will run on the inner or under side of the guard 27, so that the lever cannot be moved except at the time when theroller 28 is opposite the opening between the ends of the guard. This opening inwthe guard', when the positioning devices are raising and lowering devices, will be so arranged that it comes opposite the roller 28 at about the time when the cylinder is reaching or has reached its upward position under the action of the raising and lowering devices. Furthermore, it will be noted that when the roller 28 passes out of the annular guard it cannot return to its normal position until the disk 18 has made a complete revolution or until the parts of the machine have resumed substantially the position which they occupi ed when the controller-lever was moved. The controller-lever may be variously operated in order to move it in the manner described. In the construction shown, however, a setting mechanism is employed which in the present construction includes a rod 29,

which passes through an opening in the The rod 29 is provided with a `nut or collar 3l, which is secured to it on one side of the arm 23, and

on the other side of the arm the rod carries a washer 34, which is loose thereon.

will slip through the opening 30, thus compressing or loading the spring. If the rod be held in its forward position, it will be seen that the spring will raise the controller as soon as the opening in the guard comes opposite the roller1 28.

In the construction shown, however, the rod is connected to one of, the arms 37 of a bellcrank 37 38, which is pivoted` at 39 to the machine-frame. The arm 38 will preferably be located so that it can be actuated by the foot of the operator. -A latch 40 is preferably provided which takes over the end of the arm 38 of the bell-crank, so as to hold the rod in its forward position whenever it is desired that the machine remain tripped for any considerable length of time. In the present construction, as has been before indicated, the actual work of disengag ing the connections is performed by the ma-` chine itself. In other words, the setting mechanism so far described simply operates vto place the controller-lever in position to be operated, after which its operation is effected A col-` lar 35 is rigidly secured to the shaft, and bey tween the collar 35 and the washer 34 is ar- Vith this construction Any suitable means` may be provided for operating the rod 29.`

by other means. The means by which the actuation of the controller-lever is effected may be varied widely. In the present construction, however, this means consists of a cam 4l, which, as shown, is integral with the disk 18 vand the annular guard 27. This cam 4l comes in contact with the roll 28 of thecontroller-lever after the lever has been raised by the spring 36 and raises the lever, and with it the gab-hook, thus disconnecting the hook from the pin l5 on the lever 16,`the parts being shown in their raised position in Fig. 4. 'lhe connection between the lever 16 and the hook being thus broken, the lever moves idly without affecting the operation of the positioning devices. An annular guard similar to that which has j ust been described has been heretofore used in the best classes of constructions coperating .with 'a stud mounted directly on the gab-hook, the gabhook being raised by a mechanism actuated `directly by the operator. With this construction it was found, however, that should the operator not start to move the gab-hook at precisely the right timo he might not'suc- `ceed in moving the hook far enough to cause the roller when it was opposite the opening between the ends of the guard to move completely out. of the opening. Whenthishappened, the end of the guard would strike the stud and breakage resulted. In the present construction the peculiar form of setting mechanism and the introduction of the controller obviates these difficulties to a considerable degree. In order, however, to posi tively` insure against breakage in case the controller leverY is not moved with sufficient quickness to cause it to pass out of the opening in the annular guard,the mechanism is so constructed that 'one of the parts may yield should the controller -lever be struck by the lifting mechanism. The construction by which this yielding is effected may be varied widely in form. As shown, however, (see Fig. 7,) the roll 28 has connected to it a stem 42, and surrounding this stem is a spring 43, this spring being preferably iocated in the socket 44 in the lever 28. One of the ends of the guard 27 is preferably beveled or chamfered off, as indicated at 45. With this construction it will be seen that should the controller-lever fail to be operated at precisely the right time the beveled end 45 of the guard 27 striking the spring-mount ed roller 28 will push it back against the stress of the spring and the guard will continue its rotation without breaking the stud or being itself broken, as sometimes happens in the constructions heretofore employed.

A locking mechanism is preferably employed which serves to hold the controller in the position it assumes after it has been operated by the cam 4l. The construction of this locking mechanism may be varied within Wide limits. ln the construction shown, however, a locking-dog is employed, said dog consisting ofa bell-crank lever having arms IOO IIO

50 51, said lever being pivoted to a bracket 52, suitably secured to the frame of the machine. This locking bell-crank lever is so arranged that when the controller-lever is in its inoperative position the arm 50 of the bellcrank rests upon the top of the arm 23 of the controller-lever. When, however, the controller-lever has been operated by the cam 41, the arm 50 drops in behind the arm 23 and holds the controller-lever in the position in which it is placed by the cam. It is apparent that the movement of the controllerlever which is produced by the cam causes its arm 23 to move away from the spring 36, the power of this spring being exhausted when it has raised the controller. Since, however, the arm 23 has moved away from the spring, there would be nothing to prevent the controller-lever from dropping when the low part of the cam comes under the roller 28 if this locking mechanism were not employed. Any suitable means may be employed for controlling the locking-lever. Preferably, however, the locking-lever will be controlled from the setting mechanism. As shown, the arm 5l of this lever has connected to it a rod 54, which passes loosely through an arm 55, suitably mounted on the rod 29 of the setting mechanism. The rod 54 has a nut 56 secured to the end thereof.

While the construction which has been described illustrates a preferred form of the invention, it is to be understood that the invention is not to be'limited thereto, as the mechanism by which the various features are carried into leffect may be widely varied. Furthermore, while the invention has been shown in connection with the positioning devices of a cylinder which is moved toward and away from the bedfor each reciprocation of the bed it is not limited to use in such connection, but may be applied to the positioning devices of other cylinders.

What I claim is-- 1. The combination with a cylinder, of positioning devices therefor, operating mechanism for said devices, controlling mechanism for said operating mechanism, means operated from a moving part of the machine for actuating the controlling mechanism, a setting mechanism for the controlling mechanism, and means for preventing the setting mechanism from operating on the controlling mechanism except at specified times, substantially as described.

2. The combination with'a cylinder, of raising and lowering devices therefor, operating mechanism for said devices, controlling mechanism for said operating mechanism, means operated from a moving part of the machine for actuating the controlling mechanism, a setting mechanism for the controlling mechanism, and means for preventing the setting mechanism from operating on the controlling mechanism except at specified times, substantially as described.

3. The combination with a cylinder, of positioning devices therefor, a cam for operating said positioning devices, connections including separable parts between the cam and the positioning devices, a controlling 'mechanism for the connections, a setting mechanism for the controlling mechanism, and means for preventing the setting mechanism from operating on the controlling mechanism except at specified times, substantially as described.

4. The combination with acylinder, of raising and lowering devices therefor, a cam for operating said raising and lowering devices, connections including separable parts between the cam and the raising and lowering devices, a controlling mechanism for the connections, a setting mechanism for the controlling mechanism, and means for preventing the setting mechanism from operating on the controlling mechanism except at specified times, substantially as described.

5. The combination with a cylinder, of raising and lowering devices therefor, a cam for operating said raising and lowering devices, connections including separable parts between the cam and the raising and lowering devices, a controlling mechanism for the connections, means operated from a moving part of the machine for actuating the controlling mechanism, a setting mechanism for the controlling mechanism, and means for preventing the setting mechanism from operating on the controlling mechanism except at specified times, substantially as described.

6. The combination with a cylinder, of positioning devices therefor, operating mechanism for said devices, a controlling mechanism for said operating mechanism, means for operating the controlling mechanism, a setting mechanism for the controlling mechanism, means for preventing the setting mechanism from operating the controlling mechanism except at specilied times, and a locking device for retaining the controlling mechanism in position after it has been operated upon by the setting mechanism, substantially as described.

7. The combination witha cylinder, of positioning devices therefor, operating mechanism for said devices, a controlling mechanism for said operating mechanism, means operated from a moving part of the machine for actuating the controlling mechanism, a setting mechanism for the controlling mechanism, means for preventing the setting mechanism from operating the controlling mechanism exceptat specified times, and a locking device for retaining the controlling mechanism in position after it has been operated upon by the setting mechanism, substantially as described.

8. The combination with a cylinder, of raising and lowering devices therefor, operating mechanism for said devices, a controlling mechanism for said operating mechanism, means for operating the controlling mechanism, a setting mechanism for the controlling IOO IIO

mechanism, means for preventing the setting ism, a setting mechanism for the controlling mechanism, means for preventing the setting mechanism from operating the controlling mechanism except at specified times, and a` locking device for retaining the controlling mechanism in position afterit has been operatedupon bythe setting mechanism, substantially as described.

l0. The combination with a cylinder, ofpo-` sitioning devices therefor, operating mech-` anism for said devices, a controlling mechanism for said operating mechanism, means for operating the controlling mechanism, a setting mechanism for the controlling mechanism, means for preventing the seftingfmech-` anism from operating the controlling mechanism except at specifiedtimes, and a lock-` ing devicecontrolled by the setting mechan-l ism for retaining the controlling mechanism l in position after it has been operated upon by the setting mechanism, substantially as de-4 scribed. i

1l. The combination with a cylinder, of positioning devices therefor, operating mechanism for said devices, a controlling mech-` anism for said operating mechanism, means operated from a moving part of the machine for actuating the controlling mechanism, a setting mechanism for the controlling mechanism,means forpreventing the setting mecht anism from operating the controlling mechanism except at specified times, and a lock-- ing device controlled bythe setting mechanv ism for retaining the controlling mechanism in position after it has been operated upon 'by the setting mechanism, substantially as described.

l2. The'combination with a cylinder, of`

raising and lowering devices therefor, operating mechanism for said devices, a control-.

ling mechanism for said operating mechanism,means for operating the controlling mechanism, a setting mechanism for the controlling mechanism, means for preventing the setting mechanismfrom operating the controlling mechanism except at specified times, and a locking device controlled by the setting mechanism for retaining the controlling mechanism in position after it has been operated upon by the setting mechanism, substantially as described.

13. The combination with a cylinder, of raising and lowering devices therefor, operating mechanism for said devices, a controlling mechanism for said operating mechanism, means operated from a moving part of the machine for actuating the controlling mechanism, a setting mechanism for the controlling mechanism, means for preventing the setting mechanism from operating the controlling mechanism except at specified times, and a locking device controlled bythe setting mechanism for retaining the controlling mechanism in position after it has been operated upon by the setting mechanism, substantially as described.

14. The combination with a cylinder, of positioning devices therefor, a cam for operating said positioning devices, connections including separable parts between the cam and the positioning devices, a controller, a setting mechanism therefor, and a guard moving with the cam for preventing the setting `mechanism from operating the controller eX- cept at `specified times, substantially as described.

l5. The combination with a cylinder, of raising and lowering devices therefor, a cam for operating said devices, connections in- -cluding separable parts between the cam and the raising and lowering devices, a controller, a setting mechanism therefor, and a'guard moving with the cam for preventing the setting mechanism from operating the controller except at specified times, substantially as described.

16. The combination with a cylinder, of positioning devices therefor, a cam for operating said positioning devices, connections including separable part-s between the cam and the positioning devices, a controller, a setting mechanism therefor, a guard moving with the cam for preventing the setting mechanism from operating the controller except at specified times,and a locking device for retaining the co'ntroller in position after it has been operated u pon `by the setting mechanism, substantially as described.

i7. The combination with a cylinder, of raising and lowering devices therefor, a cam for operating said raising and lowering devices, connections including separable parts between the cam and the raising and lowering devices, a controller, a setting mechanism therefor, a guard moving. with the cam for preventing the setting mechanism from operating the controller except at specified times, and a locking device for retaining the controller in position after it has been operated upon bythe setting mechanism, substantially as described. t

1S. The combination with a cylinder, of positioning devices therefor, a cam for operating said positioning devices, connections including separable parts between the cam and the positioning devices, a controller, a setting mechanism therefor, a guard moving with the cam for preventing the setting mechanism from operating the controller except at specified times, and a locking device controlled by the setting mechanism for retaining the con- IOO IIO

troller in position after it has been operated upon by the setting mechanism, substantially as described.

19.. The combination with a cylinder, of raising and lowering devices therefor, a cam for operating said raising and lowering devices., connections including separable parts between the cam and the raising and lowering devices, a controller, a setting mechanism therefor, a guard moving with the cam for preventing the setting mechanism from operating the controller exceptl at specified times, and a locking device cont-rolled by the setting mechanism for retaining the controller in position after it has been operated upon by the setting mechanism, substantially as described.

20. The combination with a cylinder, of positioning devices therefor, a cam for operating said positioning devices, connections including a rock-lever operated by the cam and a gab-hook between the cam and the positioning devices, a controller-lever for lifting the gab hook, means actuated from a moving part of the machine for operating the controllerlever to lift the gab-hook, a setting mechanism for positioning said lever so as to be actuated by its operating means, and a guard for preventing the setting mechanism from acting upon the controller-lever except at specified times, substantially as described.

2l. The combination with a cylinder, of raising and lowering devices therefor, a cam for operating said devices, connections including a rock-lever operated by the cam and a gab-hook between'the cam and the raising and lowering devices, a controller-lever for lifting the gab-hook, means actuated from a moving part of the machine for operating the controller-lever to lift the gab-hook, a setting mechanism for positioning said lever so as to be actuated by its operating means, and a guard for preventing the setting mechanism from acting upon the controller-lever except at specified times, substantially as described.

22. The combination with a cylinder, of p0- sitioning devices therefor, a cam for operating said devices, connections including a rocklever operated by the cam and a gab-hook between the cam and the positioning devices, a eontroller-leverfoi-lifting thegab-hook,means actuated from a moving part of the machine for operating the controller-lever to lift the gab-hook, a setting mechanism for positioning said lever so as to be actuated by its 0perating means, a guard for preventing the setting mechanism from acting upon the controller-lever except at specified times, and a locking device for retaining the controller in position after it has been operated upon by the-setting mechanism, substantially as described.

23. The combination with a cylinder, of raising and lowering devices therefor, a cam for operating said devices, connections including a rock-lever operated by the cam and a gab-hook between the cam and the raising and lowering devices, a controller-lever for lifting the gab-hook, means actuated from a moving part of the machine for operating the controller-lever to lift the gab-hook, a setting mechanism for positioning said lever so as to be actuated by its operating means, a guard for preventing the setting mechanism from acting upon the controller-lever except at specified times, and a locking device for retaining the controller in position after it has been operated upon by the setting mechanism, substantially as described.

24. The combination with a cylinder, of positioning devices therefor, a cam for operating said devices, connections including a rocklever operated by the cam and a gab-hook between the cam and the positioning devices, a controller-lever for lifting the gab-hool,means actuated from a moving part of the machine 'for operating the controller-lever to lift the gab-hook, a setting mechanism for positioning said lever so as to be actuated by its operating means, aguard'for preventing the setting mechanism from acting upon the controller-lever except at specified times, and a locking device controlled by the setting mechanism for retaining the controller in position after it has been operated upon by the setting mechanism, substantially as described.

25. The combination with a cylinder, of raising and lowering devices therefor, a cam for operating said devices,connections including a rock-lever operated by the cam and a gab-hook between the cam and the raising and lowering devices, a controller-lever for lifting the gab-hook, means actuated from a moving part of the machine for operating the controller-lever to lift the gab-hook, a setting mechanism for positioning said lever soas to be actuated by its operating means, a guard for preventing the setting mechanism from acting upon the controller-lever except at specified times, and a locking device controlled by the setting mechanism for retaining the controller in position after it has been operated upon by the setting mechanism, substantially as described.

26. The combination with a cylinder, ofpositioning devices therefor, a rotating cam for operating said devices, connections including a lever and a gab-hook between the cam and the positioning devices, a controller-lever for lifting the gab-hook, a setting mechanism for said lever, a guard rotating with the cam for preventing said setting mechanism from operating on the controller-lever except at specified times, and a rotatingl cam for operating said controllerlever, substantially as described. Y

27. The combination with a cylinder, of raising and lowering devices therefor, a rotating cam for operating said devices, connections including a lever and a gab-hook between the cam and the raising and lowering devices, a controller-lever forl ifting the gab-hook,a setting mechanism for said lever, a guard rotating with the cam for preventing said setting IOC IIO

mechanism from Operating on the controllerlever except atspecihed times, and a rotating cam for operating said controller-lever, substantially as described.

28.l The combination with a cylinder, of positioning-devices therefor, a rotating cam for operating said devices, connections including a lever and a gab-hook between the cam and the positioning devices, a controller-lever for lifting the gab-hook, asetting mechanism for said lever, a guard rotating with the cam for preventing said setting mechanism from operating on the con troller-lever except at specified times, a rotating cam'for operating said controller-lever, and a locking device for retaining the controller in position after it has been operated upon by the setting mechanism, substantially as described.

29. The combination with a cylinder, of raising and lowering devices therefor, a rotating cam for operating said devices, connections includinga leverand agab-hook between the cam andthe raising and lowering devices, a controller-lever for lifting the gabhook,a setting mechanism for said lever, a guard rotating with the cam for preventing said setting mechanism from operating on the controllerlever except at specified times, a rotating caml for operating said controller-lever, and a lock` ing device for retaining the controller inA position after it has been operated upon by the setting mechanism, substantially as de! scribed. i

30. The combination with a cylinder, of positioning devices therefor, a rotating cam for operating said devices, connections including a lever and a gab-hook between the cam and the positioning devices, a controller-lever for lifting the gab-hook, a setting mechanism for said lever, a guard rotating with the cam forV preventing said setting mechanism from op-l erating on the controller except at specied' times, a rotating cam for operating said con-l troller-lever, and a looking device controlled by the setting mechanism for retaining the controller in position after it has been operated upon bythe setting mechanism, substantially as described p 31. The combination `with a cylinder, of raisingand loweringdevices therefor, arotating cam for operating said devices, connections including a leverand a gab-hook between the cam and the raising and lowering devices, a controller-lever for lifting the' gab-hook, a setting mechanism for said lever, a guard rotatingwith the cam for preventing said set ting mechanism from operating on the controller except at specified times, a rotating cam for operating said controller-lever, and a locking device controlled by the setting mechanism for retaining the controller in position after ithas been operated upon by the setting mechanism, substantially as described.

32. The combination with a cylinder, ofipositioning devices therefor, an operating mechanism for said devices, devices for rendering Said operating mechanism inoperative, a mov- Ving guard forpreventing the operation of said last-named devices except at specified times, and means whereby a yielding action is permittedbetween the guard and said devices `in case they come in contact, said fmeans infor rendering said operating mechanism inoperative, a moving guard for preventing the operation of said last-named devices except at specified times, and means whereby a yielding action is permitted between the guard and said devicesiin case they come in contact,`

substantially as described.

34. The combination with a cylinder, ofpositioning devices therefor, an operating mechanism for said devices, a controlling mechanism for said operating mechanism, a moving guard for preventing the operation of said controlling mechanism except at'specitied e times, and means whereby a yielding action e is permitted between the guard and said controlling mechanism in case they come into contact, said meansincluding a part which isi capacitatedto moveat an angle tothe plane `of the guard, substantially as described.

' 35. The combination with a cylinder, of

raising and lowering'de'vices therefor, an operating mechanism for said devices, a controly ling mechanism for said operating mechanism,

a movingguard for preventing the operation of said controlling mechanism except at specie tied times, and means whereby a yielding ac tion is permitted between the guard and said controlling mechanism in case they come into contact, substantially as described."

36. The combinationwith a cylinder, of positioning devices therefor, an operating mechanism for said devices, a'controlling mechanism for said operating mechanism, a rotating guard for preventing the operationof said 3 controlling mechanism except at specied e times, and means whereby a4 yieldingaction is permitted between the guardand said controlling `mechanism"in casegthey come into contact, said means including a 'part Which-is capacitated to move at an angle to the plane of the guard,substantiallyA as described'.Y

37. The combination with a cylinder, of positionin g devices therefor, an operating mechanism for said devices, a'controlling' mechan- IIO ism fonsaid operating mechanism, means operated from a moving part of the machine for actuating said controlling mechanism, a moving guard for preventing the operation of the controlling mechanism' except at specified times, and means wherebya yieldingaction is permitted between'the guardiand said controlling mechanism in case they com'e into contact, substantially as described.

38. .The combination Awitha cylinder, ,of positioning devices therefor,an operating mechanism for said devices, a controlling mechananism, a rotating guard for preventing theoperation of said controlling mechanism eX- cept at specified times, and means whereby` a yielding action is permitted between the guard and said controlling mechanism in case they come into contact, substantially as de? scribed. y

40. The combination with a cylinder, of positioning devices therefor, a cam for operating said devices, connections including separable parts between the cam and the positioning devices, a controller, asetting mechanism therefor, a rotating guard for preventing the setting mechanism from operating on the controller except at specified times,and means whereby a yielding action is permitted between the guard and said controller in case they come into contact, said means including a part which is capacitated to move atan angle to the plane of the guard, substantially as described.

4l. The combination with a cylinder, of raising and lowering devices therefor, a cam for operating said devices, connections including separable parts between the cam and the raising andlowering devices, a controller, asettin g mechanism therefor, a rotating guard for preventing the setting mechanism from operating on the controller except at specified times, and means wherebya yielding action is permitted between the guard and said controller kin case they come into contact, substantially as described.

42. The combination with acylinder, of positioning devices therefor, a cam for operating said devices, connections including separable parts between the cam and the positioning devices, a controller, a setting mechanism therefor, a rotating guard for prevent-` ing the setting mechanism from operating the controller except at specified times,"means for permitting a yielding action between the guard and the controller, and a locking device for retaining the controller in position after it has been operated upon by the settin g mechanism, substantially as described.

43.- The combination with a cylinder, of raising and lowering devices therefor, a cam for operating said devices, connections including separable parts between the cam and the raising and lowering devices, a controller, a setting mechanism therefor, a rotating guard for preventing the setting mechanism from operating the controller except at specified times, 'means'for permitting a yielding action between the guard and the controller, and a locking device for retaining the controller in position after it has been voperated upon by the setting mechanism, substantially as described.

4A. The combination witha cylinder, of positioning devices therefor, a cam 'for operating said devices, connections including separable parts between the cam and the positioning devices, a controller, means for operating said controller to separate the. connections, a rotating guard for preventing the operation of the controller except at specified times, said controller carrying a yielding part upon which the guard operates, substantially as described.

45. The combination with a cylinder, of raising and lowering devices therefor, a cam for operating said devices, connections including separable parts between the cam and the raising and lowering devices, a controller, means for operating said controller to separate the connections, a rotating guard for preventing the operation ofthe controller except at specified times, said controller carrying a yielding part upon which the guard operates, substantially as described.

46. The combination with a cylinder, of positioning devices therefor, a cam for operating said positioning devices, connections including separable parts between the cam and the positioning devices, a controller-lever, a setting mechanism therefor, a rotating guard, and a yieldingly-mountedstud on the controller-lever with which the rotating guard cooperates, substantially as described.

47. The combination with a cylinder, of raising and lowering devices therefor, a cam for operating said raising and lowering devices, connections including separable parts between the cam and the raising and lowering devices,a controller-lever, a setting mechanism therefor, a rotating guard, and a yieldingly-mounted stud on the controller-lever with which the rotating guard cooperates, substantially as described.

48. The combination with a cylinder, of positioning devices therefor, a cam for operating said positioning devices, connections including separable parts between the cam and the positioning devices, a controller-lever, a setting mechanism therefor, an operatingcam for the lever, a rotating guard, and a yieldingly-mounted stud on the controllerlever with which the rot-ating guard coperates, substantially as described.

49. The combination with a cylinder, of raising and lowering devices therefor, a cam for operating said raising and lowering devices, connections including separable parts between the cam and the raising and lowering devices, a controller-lever, a setting mechanism therefor, an operating-cam for the lever, a rotating guard, and a yieldingly-mounted ICO IIC

stud on the controller-lever with which the` rotating guard cooperates, substantiall y as described. i

50. The combination with a cylinder, of positioning devices therefor, a cam for operating said positioning devices, connections including separable parts between the caln andv` the positioning devices, a controller-lever, a setting mechanism therefor, anoperatingcam for the lever, a rotating-guard, a yieldingly-mounted stud on the controller-lever with which the rotating guard cooperates, and' vices, connections including separable parts tions, a rotating guard for preventing the opbetween the cam and the raising and lowering devices, a controller-lever, a setting mechan-l ism therefor, an-operating-cam for the lever, a rotating guard, a yieldingly-mounted stud on the controller-lever with Which the rotating guard cooperates, and alocking device for the controller-lever controlled by the setting mechanism, substantially as described.

52. The combination with a cylinder, of positioning devices therefor, a cam for operat-` ing said devices, connections including separable parts between the cam and said positioning devlces, a controller for said conneceration of the controller except at specified times, said guard having a beveled end, a

yieldingly-mounted stud with which the guard cooperates, and means for operating the controller, substantially as described.

53. The combination with acylinder, of positioning devices therefor, a cam for operating said devices, connections including separable parts between the cam and said positioning devices, a controller for said connections,`a rotatingguard for preventing the op-A eration of the controller except at specified times, said guard having a beveled end, a yieldi ugly-mounted stud with which the guard coperates, and a cam for operating the controller, substantially as described.

54. The combination with a cylinder, of positioning devices therefor,a cam for operating said devices, connections including separable parts between the cam and said positioning devices, a controller for said connections, a setting mechanism for the controller, a rotating guard for preventing the setting mechanism from operating the controller except at specified times, said guard having a beveled end, a yieldingly-mounted stud on the controller with which said guard coperates, and means for operating the controller, substantially as described.

55. The combination with a cylinder, of positioning devices therefor, a cam for operating said devices, connections including separable parts between the cam and said positioning devices, a controller for said connections, a setting mechanism for thercontroller,

'stud on the controller-lever with which the guard coperates, substantially as described.

57; The combination with a cylinder, of positioning devices therefor, a rotating cam for operating said devices, connections including a lever and a gab-hook between the cam and said devices, a controller-lever forflifting the gab-hook, a setting mechanism for said lever,

a rot-ating guard, a yieldingly-mounted stud on the controller-lever with whichthe guard cooperates, and a locking device for retaining the controller-lever in position after it has been operated upon by the setting mechanism, substantially as described.

58. The combination with a cylinder, of positioning devices therefor, an operating mechanism for `,said devices, a bell-crank controller-lever for said operating mechanism, means for operating said lever, and a pivoted dog operating to hold the controller-lever in positio'n after it has been acted `upon by its operating mechanism, substantially as. described.

59. The combination with a cylinder, of positioning devices therefor, a cam for operating said devices, connections including a lever and gab-hook between the cam and positioning devices, a bell-crank controller-lever for operating the gab-hook, a setting mechanism for the controller-lever including aspringrod, a pivoted locking-dog operating to hold the controller-leverl yin position after it has been acted upon by the setting mechanism, and connections between the dog and-the rod, substantially as described.

60. The combination with a cylinder, of positioning devices therefor, a cam for operating said devices, connectionsincludinga lever and a gab-hook between theLcam and the positioning devices, a bell-crank controller-lever for the gab-hook, airotating cam for operating the lever, a rotating guard for preventing the operation of the lever except at specified times, a yieldingly-mounted stud on the lever with which the guard cooperates, a setting mechanism including a spring-mounted rod, a pivoted locking-dog for the controller-lever, and connections between the dog and the spring-rod, substantially as described.

6l. The combination with a cylinder, of positioning devices therefor, a cam for operating said devices, connections including separable parts between the cam and said de- IIO vices, a controller-lever for said connections, a .rotating cam for operating the lever, a settingV mechanism including a spring-pressed rod for the lever, actuating devices for the rod, means for locking the rod in its operative position, and means for preventing it from operating on the controller-lever except at specified times, substantially as described.

62. The combination with a cylinder, of positioning devices therefor, a cam for operating said devices, separable connections between lthe cam and said devices, a controllerlever, an operating-cam therefor, a setting mechanism including a spring-pressed rod,

means for actuating the rod, a locking device for said actuating means, a rotating guard for preventing the actuation of the controllerlever except at specified times, and a yieldingly-mounted stud on the lever with which the guard coperates, substantially as described.

63. The combination with a cylinder, ofpositioning devices therefor, a cam for operat- 'JOSEPH WHITE.

VWitnesses:

F. W. H. CRANE, L. RonHM.

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