US2206841A - Controlling device for printing machines - Google Patents

Description

J 2, 1940- A. J. HORTON I 2,206,84 1

CONTROLLING. DEVICE FOR PRINTING MACHINES Filed Jan. 28, 1938 28 -"1 INVENTOR g Patented July 2, 1940 PATENT OFFICE CONTROLLING DEVICE FOR ram'rmc moms- Albert J. Horton, White Plains, N. Y., assignor to R. Hoe & 00., Inc., New York, N. Y., a corporation of New York Application January 28, 1938, Serial No. 187,345

22 Claims.

possible damage, and inconveniences will be 6 avoided, due to chokes occurring at or adjacent to the folding mechanism of the machine.

In printing machines, wherein the products require folding, the folding mechanism usually includes a pair of cylinders having cooperating means to fold the products as fast as they are delievered from the printing mechanisms. Chokes constituted by the accumulation of products at or adjacent this folding mechanism occasionally occur which may cause considerable damage, due to severe strains being imposed upon the adjacent machine parts, and inconvenience in that considerable time is required to free the choked products from the affected parts.

Before such chokes occur, or at least become suificiently developed to cause damage, one or more of several, conditions become existent. Among these conditions are, the absence of products being delivered, thedelivery of products at an improper time, the absence of a product on 25 one of the folding cylinders at the proper time,

and the presence of a product on the folding cylinder at an improper time. Whenever any of these conditions become existent, a choke may be in the process of development and, due to the rapidity of the machine operation whereby the choke will rapidly develop to troublesome proportions and to the, complicated nature of the printing machine, it-is generally impossible for an attendant to promptly observe these indications of 35 a chokeand to avoid subsequent damage by preventing continuance of the fault in time.

Automatically operable means, including both mechanically and electrically operated mechanisms have been provided,most of which operate 40 only after a choke has occurred, and by using the accumulated products to operate an actuating member to stop the printing machine. These devices require the occurrence of a choke to operate them, which in many instances is suflicient to impose severe strains upon the machine parts, or cause considerable inconvenience and loss of time While the choke is being cleared.

One of the principal objects of this invention is n to provide a control device which is automatically operable to actuate controlling means for a printing machine in time to prevent disastrous and inconvenient chokes, especially at the folding mechj anism of such machines.

Another object is to provide means in a printinc machine to detect the presence of a product at a predetermined position at an improper time and to actuate control mechanism, when the product is so detected, to avoid possible damage, or further irregularities in machine operation.

Still another object is to provide a printing machine control mechanism which is automatically operable upon the absence or presence of 'a product in a position before the proper time therefor, to actuate suitable devices to stop further operation of the printing machine or otherwise to interrupt the feeding of products therethrough or both. i i

A further object is to provide mechanically operated devices arranged to detect the absence or presence of a product at or adjacent to a machine part during an improper interval in the operation of a printing machine and to actuate mechanism to stop the machine, or interrupt the flow of products therethrough or both.

It is also an object of the invention to provide a control device for printing machines, of generally improved construction, whereby the device will be simple, durable and inexpensivein construction, as wellas convenient, practical, service-' able and eflicient in its use. i a

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts, and in the details of construction hereinafter described and claimed.

An embodiment of the invention is illustrated in the accompanying drawing, wherein:

Figure 1 is a more or less diagrammatic illustration of an arrangement, and combination of features and devices constituting a control mechanism embodying thefeatures of this invention shown in cooperating association with the folding and delivery mechanism of a printing machine;

Figure 2 is a view of the same looking in the direction of arrow 2 in Figure 1;

Figure 3 is an illustration of a somewhat modified form of control mechanism: and

Figures 4 and 5 are enlarged end and'side views respectively of certain parts of the form shown in Figure 3 whereby they are adapted to control a printing machine when the products are collected before folding. I

It will be understood that the invention is especially adapted for use with printing machines wherein the products thereof are fed to folding and delivery mechanisms. Herein is shown a continuous web ll being fed between a pair of cylinders and I3 havingcooperating mechanism forsevering the web II as indicated at H.

The severed web portion I5 is carried by the cylinder |2 as it rotates with its shaft 26, into position to be acted upon by a folding blade l6 which .directs it between a pair of folding rollers l1 and I8. After passing between the rollers l1 and I8, the folded products are received one at a time by a fan wheel, or fly l9, and delivered therefrom onto a suitable receiving member (not shown). Suitable means, generally an electric motor indicated diagrammatically at 2| is provided to drive the operating parts of the printing machine and suitable interconnecting mechanism insures the proper timing of the various components of the machine for operating on the web and delivering the products in proper timed relation.

The particular point at which most chokes occur in printing or similarly operating machines is after severing the web, and as the severed product is folded. The products at this position occasionally accumulate, choking the mechanisms, whereby considerable damage thereto may result. At such times, the product may not be carried beyond the rollers l1 and I8 (as shown at 22) into proper position to be acted upon by the blade IS. The product, under the above conditions, will not pass between the rollers IT and I8. Such irregularity in operation, when it occurs,'is an indication that a choke is being developed, and immediate interruption of the machine operation is desirable.

A mechanism for automatically detecting the above mentioned irregularity and to actuate devices to stop operation of the printing machine or an affected portion thereof is herein disclosed. This mechanism is operated by the absence of a product at a time when it should be present, or its presence at an improper time below the rollers l1 and I8, or by'its presence at animproper time or absence at the proper time, upon the cylinder l2 at 22.

The mechanism contemplates, in one instance, the interruption of the operation of the printing machine, and, therefore, provision is made for interrupting an electric circuit which controls the operation of the main driving motor 2| by opening a switch 23. It is also contemplated to interrupt the feeding of the web II, and an elec- I trically operated websevering means, or knife 24, is provided for this purpose. The electrically operated actuating means for the knife 24 is under control of a solenoid switch 25.- A single solenoid 26 is arranged to operate both switches 23 and 25 but it is obvious that one or the other switch may be omitted if itis not desired to both stop the machine and sever the web.

Referring particularly to Figure 1, the printing machine is driven by the motor 2|, when it is in regular operation. Another motor shown diagrammatically at 21 is used to drive the machine at slow speed while preparing the machine for operation, including the threading of the web therethrough. Provision is herein included to prevent the operation of the devices of this invention while the motor 21 is being used, and to automatically place them in operative condition as soon as the motor 2| is put in operation. This arrangement includes switches 28 and 29 operated by a solenoid 3|, the switch 28 being in control of the solenoid 26 to maintain it deenergized until the motor 2| is started, and the switch 29 being in control of the circuit through the switch 25 controlling the web severing means 24.

, The motors 2| and .21 are shown connected to a line wire Ll by a conductor 32 and through rethem for spective resistances 33 and 34 by a movable contact 35 connected by a conductor 36 to one terminal of the switch 23, the other terminal of which is connected to the line wire L2, When the contact 35 is moved into contact with the resistance 33, controlling the motor 2|, a circuit from the same through a conductor 31 to the solenoid 3|, from which a conductor 38 leads to the motor terminal connected to the line wire M is closed to energize the solenoid 3| and close the switches 28 and 29.

The mechanism shown for controlling the energization of the solenoid 26 and through it the opening of the switch 23 to stop the motor 2| and to close the switch 25 to actuate the knife 24 to sever the web comprises a pair of mechanically operated devices adapted to detect the presence and absence of a product, on the cylinder |2 at 22, in one instance, and below the rollers l1 and I6 at 39, in another instance. Each device is arranged in control of the solenoid 26 so as to energize it to stop the motor 2|, or actuate the knife 24 or both, when a product is present at the respective positions 22 and 39 and also when a product is absent at these positions at an improper time.

The devices are herein shown in Figures 1 and 2, as being operated by a common actuating means constituted by a cam 4| mounted on the shaft 42 of the cylinder l3. The cam 4| has two camming points 43 and 44 formed on its periphery whereby twice every revolution of the cylinder l3, a forked member 45 is given a downward stroke by means of a roller 46 carried thereby, which cooperates with the camming points 43 and 44. A spring 41 reacting between the forked member 45 and a machine frame part 48 maintains the roller 46 in engagement with the periphery of the cam 4|. The lower end of the forked member 45 is provided with a cross arm 49 (Figure 2) having spaced apart studs 5| and 52 extending therefrom and through arms 53 and 54 respectively, of a pair of bell cranks 55 and 56. Springs 51 and 58 are provided to react between the cross-arm 49 and the arms 53 and 54 respectively, t resiliently connect them for movement of the arms in a downward direction, and a collar 59 is secured to each stud and 52 below the respective arms 53 and 54 to connect movement of the arms in an upward direction.

The bell cranks 55 and 56 are rockably mounted upon a suitably supported shaft 6| and are provided with other arms 62 and 63 respectively, the arm 62 on the bell crank 55 extending upwardly, and the arm 63 on the bell crank 56 extending downwardly. The arm 62 is connected by a bar 64 to an arm 65 extending upwardly from a sleeve 66, secured upon a suitably supported shaft 61. A product engaging finger 68 is secured to the shaft 61 and extends therefrom toward the cylinder l2. The finger 68 is adapted to enter a peripheral groove 69, provided in the cylinder 2 for this purpose, when no prodnot is present at the position 22, and to be prevented from entering the groove 69 by a product when one is present at 22.

Anelectric switch lever 1| (Figure 1) herein shown connected to the sleeve 66, is operated by rocking movement of the sleeve 66 (when this is permitted by the finger 68 entering the groove 69), to engage a switch contact 12 and close a circuit between it and an elongated contact 13.

When no rocking movement of the sleeve 68 is permitted (due to the finger 68 encountering a product at 22 a circuit through the lever 'II from the contact I3 and a switch contact I4 is maintained closed. From the above, it will be understood that, when the forked member 45 is forced downwardly by-either of the points 43 or 44, the bell crank 55 will tend to be rocked by the pressure imposed upon the arm 53 by the spring 51, and through the bar 64, the sleeve 66 will tend to be rocked to move the finger 68 into the groove 69 in the cylinder I2. Should a product be present at 22 at the proper time the circuit between the contacts I3 and I4 will remain closed and that between contacts I2 and I3 open, but if a product is absent at 22 when it should be there, a reverse arrangement of the circuitsis made due to the sleeve 66 being permitted to rock. Reversely, if the sleeve 66 is prevented from rocking due to a product being present at 22 at an improper time the circuit between the contacts I3 and I4 will not be opened and the circuit between contacts I2 and 13 will not be closed.

In order to time the device so that the solenoid 26 will be energized to actuate the switches 23 or 25 or both when a product is either absent at 22 at the proper time or present at an improper time, a cam I5 (Figure 1) is provided having a raised peripheral camming surface I6 and a depressed surface 11. An electric switch arm I8 having a roller I9, riding on the periphery of the cam I5 is adapted to be swung between a pair of contacts 8| and 82. The arm 18 engages the contact 9| when the roller I9 is riding on the raised cam surface I6, and engages the contact 8| when the roller I9 is riding on the low surface 11. The contact 8| is connected by a conductor 63 to the contact I4 and the contact 82 is connected by a con- ,ductor 84 to the contact I2. The contact .13 is connected by aconductor 85 to one terminal of the switch 29, the other terminal of this switch being connected by a conductor 86 .to the line wire L2. The switch arm 18 is connectedby a conductor 81 to one terminal of the switch 28, the other terminal of this switch being connected by a conductor 88 to the coil of the solenoid 26, which is connected to the line wire LI by a conductor 89.

The cam I5 is suitably arranged to be rotated in synchronism with the cylinder I3 and the surfaces I6 and II are positioned to be presented to the roller I9 to actuate the switch arm I8 to engagethe contact 82 during the interval a product should be present at 22, and to engage the contact 8| during the interval no product should be there. From the above, it will be understood that the solenoid 26 might be energized twice during a revolution of the cylinder I3 and cam 4|, should the proper contacts be engaged by the switch lever II and arms I8, to complete the circuit through the solenoid 26, first due to the improper presence, and secondly, due to the improper absence of a product at 22, but will not be energized if a product is present at, or ,absent from 22, at the proper time. i i

In order to similarly control the. energization of the solenoid 26, should a product be absent or present at improper times at the position 39 belowthe rollers I1 and I8, the arm 54 of the bell crank 56 is connected to a bar 9| suitably supported to be reciprocated towardand away from the line of travel of a product passing from the rollers I1 and I8 to the fan wheel or fly I9. A roller 92 is supported upon the end 93 of the bar 9| and is adapted to enter a groove 94 provided in a roller 95 mounted upon a machine frame part 96 disposed between the axially spaced apart portions 91 and 98 of the fan wheel I9. The roller 95 is disposed adjacent the line of travel of the products between the rollers I I and I8 and the fly I9 onthe opposite side thereof from the roller 92, so that'a product disposed therebetween will prevent the roller 92 entering the groove 94.

Imposition of pressure by means of the spring 58 upon the arm 54, due to either of the cam points 43 or 44, will tend to slide the bar 9| to cause the roller 92 to enter the groove I4 when a product is not present at 39. A switch bar 99 carried by the bar 9| constantly engages a contact I9I, connected by a conductor I92 to the switch 29 through the conductor 85. The bar 99 is adapted to engage a contact I93 (connected to the contact 82 by a conductor I94), when the roller 92 is prevented from entering the groove 94 by a product passing from the rollers II and I8, and to engage a contact I 95 (connected to the contact 8| by a conductor I96), when no product is present at 39 and the roller 92 passes the line of travel of the product and enters the groove 94.

In cooperation with the timing cam switch arm I8, the roller 92 will enter the groove 94 I 92 will be permitted to move and carry the bar 99 into engagement with the contact I95 and through the contact 8|, engaged by the arm I8 at this time, cause the solenoid 26 to be energized. While only one cam I5 is required in this instance, due to the control surfaces I6 and 11 thereof being adapted to be positioned in respect to the arm I8, in correspondence with the presence and absence, or reversely, of a product at 22 and 39 respectively, it will be understood that a similar control cam may be provided for each device and also that either device may be omitted if found desirable. It will also be understood that all of, the switches shown diagrammatically in the drawing may be of known commercial types.

By associating either or both of the devices with a printing machine, especially in cooperation with the folding mechanism thereof, possible chokes may be detected before theyidevelop and the machine stopped before-any damage or inconveniences are experienced. For instance, the improper absence and presence of a product at 22 and 39 is subjected to two tests for every product cut from the web I and these tests are made, one before, and one after, folding. The detecting devices, constituting the control device of this invention are not necessarily limited for use in association with the folding devices-of a printing machine, as they are obviously adaptable for use In connection with other parts or mechanisms thereof, or of like machines, to detect the presence or absence of a product at improper inter-- vals, at any position where chokes are liable to occur, during machine operation.

The modified arrangement shown in Figures 3,

In this arrangement the forked member 45 is'reciprocated by a cam II I mounted on the shaft 28 of the cylinder I2 to rotate therewith. The cam I II has four similar camming surfaces H2, H3, H4 and H5 upon its periphery, upon which a roller II6 rides. The roller H6 is carried by one arm of a lever I I1 pivoted at I I8. The other arm I I9 of. the lever I I1 is secured to,the forked member 45 to move it downwardly to compress the springs 51 and 58 for the purposes above described in respect to the arrangement shown in Figures 1 and 2'.

In this modified arrangement, one of the folding blades I6 on the cylinder I2 is adapted to be silenced and the cylinder I3 is provided with product engaging pins I I8. When products are to be collected, one of the blades is made inoperative and the pins I III are made operative to take every other product and carry it around the cylinder I3 and transfer it to the cylinder l2 in assembly with the next product thereon. The collected products on the cylinder I2 are then folded by the folding blade I6 and delivered to the delivery mechanism. When both of the blades I6 are arranged to be operative and the pins III) are made inoperative, the products are not collectedbut follow through the same operations as in the arrangement shown in Figures 1 and 2.

' In order to adapt the arrangement shown in Figures 3, 4 and 5 for use when either collected or non-collected products are to be acted upon, the cam for actuating the switch lever 18 is constructed by abutting three discs I2I, I22 and I23, each of which is adjustably secured to a shaft I24, driven in unison with the shaft 28 of the cylinder l2, and the roller 19 is made sufiiciently long to extend across the three cam surfaces I23, I26 and I25. The disc I2I is provided with a raised camming 'surface I25 upon its periphery upon which the roller. 19 is adapted to ride to swing the switch lever 18 to the contact 8i to insure the detection of the presence of a product at 39 and the absence of. a product at 22 when the forked member 45 ispressed down by the camming finger I I 3. The disc I22 islikewise provided with a raised camming surface I26 upon its periphery to similarly act upon the switch lever 18, and when the discs are adjusted as shown in Figure 3, it insures a similar detection of the next product at points 22 and 39 when the forked member 45 is pressed down by the camming finger II5. With the discs thus arranged, when the depressed cam surfaces of the discs are engaged by the roller 19, the lever 18 is permitted to engage the contact 82 to insure detection of the presence of a product at 22 and the absence of one at 39 when the forked member 45 is pressed 7 down by the camming fingers H2 and III.

The disc I22 is also provided with a median camming surface I 21 adapted to hold the lever 18 in a neutral position I3I (Figure 3) intermediate the contacts 8| and 82. The surface I 21 is positioned diametrically opposite to the camming surface I 26. The disc I23 also is provided with a median camming surface I28, similarly adapted to hold the lever 18 in'the neutral position I3I intermediate the contacts 8| and 82.

When the form of mechanism shown in Figures'3, 4 and 5 is to be used in detecting the presence and absence of a product at 22 and 39 of products that are not collected, the parts are arranged as shown in Figure 3. In this arrangement, both of the folding blades I6 are made operative and the pins III) are made inoperative 11D. the usual manner. The cam discs I2I, I22 and I23 are adjusted on the shaft I24 with the raised cam surface I25 on the disc HI and the raised cam surface I26 on the disc I22 disposed diametrically opposite and with the median surface I28 on the disc I23 in axial alignment with the raised cam surface I26 on the disc I22, so as to be inoperative. The cam surface I21 on the disc I22 will likewise be inoperative by being disposed in axial alignment with the cam surface I25 on the .disc I2I. When-the parts are so arranged and adjusted, the mechanism will act as in the preivizously described form shown in Figures 1 an When the mechanism is to be used in detecting the presence and absence of collected products at 22 and 39, the parts are arranged as shown in Figures 4 and 5. In this arrangement, only one of the folding blades I6 on the cylinder I2 is operative, the other one being either removed or otherwise silenced, and the pins IIII are made operative so as to collect products as above described. The cam discs I2I, I22.and I23 are adjusted on the shaft I24 with the raised cam surface I25 on the disc I2I and the raised surface I26 on the disc I22 in axial alignment to act on the lever 18 as one surface. The median camsurface I28 on the disc I23 is disposed to form in effect, a continuation of the cam surface I21- on the disc I22 which is now disposed diametrically opposite in respect to the surfaces I25 and I 26. This arrangement will dispose the surfaces I28 diametrically opposite depressed portions of the discs I2I and I22 which permit the lever 18 to engage the contact 82.

From the above, it will be understood that during one-half of a revolution of the cylinder I2 I when a product is taken by the pins IIII on the cylinder I3 and no product is carried about the cylinder I2 nor folded therefrom, the mechanism is inoperative, due to the lever 18 being maintained in the neutral position I3I by the cam surfaces I21 and I28. The mechanism operates to detect the presence and absence of the collected products at 22 and 39, as above described, during the following half revolution of the cylinder I2, due to the lever 18' being acted upon by the depressed portion I29, to cause engagement with contact 82, and then by the raised surfaces I25 and I26 of the discs I2I and I22 to cause engagement with the contact 8|.

It will be understood that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore desired that the present embodiment be considered in all respects as illustrative and not restrictive, and it will be further understood that each and every novel feature and combination present in or possessed by the device herein disclosed forms a part of the invention includedin this specification.

What I claim is:

1. In a control device for a printing machine having a cylinder upon which a product is disposed at timed intervals, means to successively detect the presence of a product thereon in an interval when no product should be present and the absence of a product thereon in an improper interval when a product should be present, and to stop the machine.

2. In a. control device for a printing machine having a cylinder upon the periphery of which a product is disposed at timed intervals, means to successively detect the presence of a product thereon in an interval when no product should be present, and the absence of a product thereon in an interval when a product should be present, and to prevent; further disposition of products on said cylinder.

3. In a control device fora printing machine having a pair ofcooperating devices between which the printed material is passed from one to the other at regular intervals, and means to detect the presence of the material between said devices at a time when no material should be present, and alternatively to detect the absence of the material between said devices at a time when material should be present, and when such detection occurs, to stop the machine.

4. Ina control device for a printing machine having a pair of cooperating devices between which the printed material is passed from one to the other at regular intervals, means to prevent the feeding of the material between said devices, and means to detect the presence of the material between said devices at a time when no material should be present, and alternatively to detect the absence of the material between said devices at a time when material should be present, and when such detection occurs, to actuate said feed preventing means to interrupt the material feeding operation.

5. In combination in a machine wherein material is fed at regular intervals to a given point,

means to stop the feed of material to the given point, and a member movable across the path of the material to detect the presence of material at said point at improper intervals and alternatively the absence of material at said point when it should be present, and when such detection occurs, to actuate said material feed stopping means. i

6. In a printing machine controller, means to operate said machine, a cylinder to which printed webmaterial is fed, means to cut products from the web and remove them from the cylinder at regular intervals, meansto interrupt the feed of material to said cylinder, means to detect the presence of cut products on said cylinder in an interval when no productsshould be present, and to actuate said machine operating means to stop the machine and to actuate said material feed interrupting means to stop the feed of material to said cylinder.

7. In a mechanism for controlling a printing machine, first means to operate said machine at slow speed, second means to operate said machine at higher speed, a member to whichprinted material is fed at regular intervals to be cut and folded, means to detect the presence of material on said member at an improper interval and to actuate said second machine operating means to stop the machine, and an interlocking control between said detecting means and said machine operating means to prevent operation of said detecting means when said first machine operating means isin operation.

,8. In a control mechanism for a printing machine, a relay operableto stop said machine, a folding cylinder to which printed web material is fed to be cut and folded at regular intervals, a member moving to and from the path of the material to alternately detect the presence and absence of material on said cylinder at improper intervals and arranged to operate said relay.

9. In a control device for a mechanism adapted to fold a product, a motor for driving the said mechanism, an electrically operated controller for the motor, a member having a regular movement into and out of the path of the product and moved in synchronism with the machine, and a m member.

switch operated by said member to affect the controller to stop operation of the motor when a product is so positioned that it interferes with the normal movement of the said member.

10. In a control device for a mechanism adapted to fold a product, a motor for driving the said mechanism, an electrically operated controller for the motor, a first member and a second member each having a regular movement into and out of the path of the product and moved in synchronism with the machine, a switch operated by each of said members to affect the controller to stop operation of the motor when a product is so positioned that it interferes with the normal movement of either of thesaid members, and means to move each member into the path of the product while the product is passing the other 11. In a control mechanism for a printing machine having a folding cylinder to which printed Web material is fed to be cut and folded, a detector member driven in synchronism with the machine and moving to and from the path of the material to detect the presence of material on the cylinder during an improper interval, and alternatively to detect the absence of material from the cylinder during an improper interval, a relay operable to stop the machine, a detector switch operably connected to the detector member, and a timing switch driven in synchronism with the machine and cooperating with the detector switch to operate the relay.

12. In a control mechanism for a printing machine having a folding cylinder to which printed web material is fed to be cut and folded, a detector member driven in synchronism with the machine and moving to and from the path of the material to detect the presence of material on the cylinder during an improper interval, and alternatively to detect the absence of material from the cylinder during an improper interval, a relay operable to deflect the material away from the folding cylinder, a detector switch operably connected to the detector member, and a timing switch driven in synchronism with the machine a and cooperating with the detector switch to operate the relay.

13. In a control mechanism for a printing machine having a folding cylinder to which printed web material is fed to be cut and folded to form products, folding rollers associated with the folding cylinder, a delivery fan to which the products pass from the folding rollers, a detector member driven in synchronism with the machine and moving to and from the path of the folded products passing from the folding rollers to the fan, to detect the presence of a product between the folding rollers and the fan during an improper interval, and alternatively to detect the absence of a product during an improper interval, a relay operable to stop the machine, a detector switch operably connected to the detector member, and a timing switch driven in synchronism with the machine and cooperating with the detector switch to operate the relay.

14. In a control mechanism for a printingmae chine having a folding cylinder to which printed web material is fed to be cut and folded to form products, folding rollers associated with the folding cylinder, a delivery fan to which the products pass from the folding rollers, a detector member driven in synchronism with the machine and moving to and from the path of the folded products passing from the folding rollers to the fan, to detect the presence of a product between the folding rollers and the fan during an improper interval, and alternatively to detect the absence of a product during an improper interval, a relay operable to deflect the material away from the folding cylinder, a detector switch operably connected to the detector member, and a timing switch driven in synchronism with the machine and cooperating with the detector switch to operate the relay.

15. In a control device for a printing machine having a folding cylinder and operated by a motor, an electrically operated controller for the motor, a detecting member having a movement toward and from the folding cylinder, a switch connected to the detecting member, a timing mechanism driven in synchronism with the machine and in circuit with the switch; said switch and said timing mechanism being arranged to cooperate to control the circuit of the said controller to stop the machine when the detecting member moves toward the cylinder, and its motion is not impeded by a product on the cylinder,

if a product should normally be there at that time.

16. In a control device for a printing machine having a folding cylinder and operated by a motor, an electrically operated controller for the motor, a detecting member having a movement toward and from the folding cylinder, a switch connected to the detecting member, a timing mechanism driven in synchronism with the machine and in circuit with the switch; said switch and said timing mechanism being arranged to cooperate to control the circuit of the said controller to stop the machine when the detecting member moves toward the cylinder, and its motion is impeded by a product on the cylinder, if a product should normally not be there at that time.

1'7. In a control device for a printing machine operated by a motor and having a folding cylinder, an electrically operated controller for the motor, a detecting member having a movement toward and from the folding cylinder, a switch connected to the detecting member/a timing mechanism driven in synchronism with the machine and in circuit with the switch; said switch and said timing mechanism being arranged to cooperate to control the circuit of the said controller to stop the machine when the detecting member moves toward the cylinder twice in succession, and its motion is not impeded by a product on the cylinder.

18. In a control device for a printing machine operated by a motor and having a folding cylinder, an electrically operated controller for the motor, a detecting member having a movement toward and from the folding cylinder, a switch connected to the detecting member, a timing mechanism driven in synchronism with the machine and in circuit with the switch; said switch and said timing mechanism being arranged to cooperate to control the circuit of the said controller to stop the machine when the detecting member moves toward the cylinder twice in succession, and its motion is impeded each time by a product on the cylinder.

19. In a control device for a printing machine driven by a motor and having folding rollers and a delivery fan, an electrically operated 'controller for the motor, a detecting member having a movement into and away from the path of a product passing from the folding rollers to the fan, a switch connected to the detecting member, and a timing mechanism driven in synchronism with the machine and in circuit with the switch; said switch and said timing mechanism being arranged to cooperate to control the circuit of the said controller to stop the machine when the detecting member moves toward the path of the product, and its motion is not impeded by a product if a productshould normally be there. at-that time.

20. In a control device for a printing machine driven by a motor and having folding rollers and a delivery fan, an electrically operated controller for the motor, a detecting member having a movement into and away from the path of a product passing from the folding rollers to the fan, a switch connected to the detecting memher, and a timing mechanism driven in synchronism with the machine and in circuit with the switch; said switch and said timing mechanism being arranged to cooperate to control the circuit of the said controller to stop the machine when the detecting member moves toward the path of the product, and its motion is impeded by a product if a product should normally not be there at that time.

21. In a control device for a printing machine driven by a motor and having folding rollers and a delivery fan, an electrically operated controller for the motor, a detecting member having a movement into and away from the path of a product passing from the folding rollers to the fan, a switch connected to the detecting member, and a timing mechanism driven in sychronism with the machine and in circuit with the switch; said switch and said timing mechanism being arranged to cooperate to control the circuit of the said controller to stop the machine path of the product twice in succession, and its motion is not impeded of the product.

22. In a control device for a printing machine driven by a motor and having folding rollers and a delivery fan, an electrically operated controller for the motor, a detecting member having a movement into and away from the path of a product passing from the folding rollers to the fan, a switch connected to the detecting member, and a timing mechanism driven in synchronism with the machine and in circuit with the switch; said switch and said timing mechanism being arranged to cooperate to control the circuit of the said controller to stop the machine when the detecting member moves toward the path of the product twice in succession, and its motion is impeded each time by a product in the path of the product.

ALBERT J, HORTON.

by a product in the path

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