US1480132A

US1480132A - Printing press and method of operating the same

Info

Publication number: US1480132A
Application number: US350339A
Authority: US
Inventors: White Joseph; Eckhard William
Original assignee: HALL PRINTING PRESS Co
Current assignee: HALL PRINTING PRESS Co
Priority date: 1920-01-09
Filing date: 1920-01-09
Publication date: 1924-01-08
Anticipated expiration: 1941-01-08

Description

Jan. 8 1924.

J. WHITE ET AL PRINTING PRESS AND METHOD OF OPERATING-THE SAME original Filed Jan. 9. 1920 :s-sheets-sh'eet 1 f by Jan. 8 1924. 1,480,132 J. WHITE ET AL PRINTING PRESS AND METHOD OF OPERATING THE SAME Original Filed Jan. 9, 1920 3 Sheets-Sheet 2 f 7., 1 o .162 iff 6743 I//IIIIIII sepa WH/ rE AMD M//LL/a/n farma/rn Jan. 8 1924. 1,480,132 J. WHITE ET Al.

PRINTING PRESS AND METHOD OF OPERATING-THE SAME Original Filed Jan. 9. 1920 3 Sheets-Sheet 3 AND 'Patented Jan. 8, 1924.

Imuren STATES PATENT corrieri..`

JOSEPH 0F MIDDLESEX, WILLIAM ECKHARD, 0F PLAINFIELD, NEW JER- SEY, ASSIGNOBS T0 HALL PRINTING PRESS COMPANY, OF DUNELLEN, NEW JER- SEY, CORPORATION OF NEW JERSEY.

PRINTING PRESS AND METHOD OF OPERATING THE Application led January 9, 1920, Serial No. 350,339. Renewed March 21, 1923.

To all whom t may eminem.'

Be it known that we, JOSEPH WHITE, a citizen of the United States, residin at Middlesex, in the count of Union and tate of New Jersey, and l' ILLIAM ECKHARD, a citizen of the United States, residing at Plainfield, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Printin Presses and Methods of Operating the ame, of which the following is a specification.

Our invention relates to methods and apparatus used in printing whereby the character of the register which the printer desires to obtain, will determine the operation of the press and the automatic sheet feeder, if the press has one. and also methods and' apparatus by which the printer operating the4 press or a supervisor, may have knowledge of the conditions of operation of the press without stopping the same or inspecting its product.

Heretofore it has been customary in printing presses provided with automatic sheet feeders and a trip for the printing couple, to provide register detectors which will contact with a sheet being presented to the press, and which will trip the press and suspend or stop the further operation of the automatic feeder when such a sheet is not properly presented to the gages or, in other words, in such a position that it would be printed out of register. Such an arrangement, however, does not provide for the fact that in some classes of work it is not necessary to' suspend the operation of the automatic feeder (which necessarily decreases the output ot' the press) unless the sheet is very considerably out of register.r In other words, it may be that the automatic feeder is delivering to the press gages a sheet which Jis .very closely in registered position, but which nevertheless is suiiiciently out of such position to operate the, sheet detector, parf ticula-rly if such detector is set to operate when the out of register position ""is' 'extremely small, as it must necessarily be con-` structed to form a tine quality of p rinting. j ln such case the failure of evenv an occasional'.A

sheet to reach exact register position will stop the operation of the feeder and consequently cut down the output of the press unnecessarily. Furthermore, in a tine register job it isv desirable that the pressman have knowledge of the registration of the successive sheets without being obligedA to examine each one. It is well understood in the printing art that even with the best of appl'iances, occasionally a sheet will be printed slightly out of register. Sometimes this is so occasional that the printer knows that lie cannot probably reset his apparatus so as to take care of such occasional sheets. On the. other hand, if the number of out-ofreglster sheets is considerable, then the printer knows that adjustment of some sort 1s required, or that some of his adjustments have gotten out of position in the operation of the machine, and it will therefore be neccessary for him to stop the machine to correct the difficulty. lt is another object of our invention to provide a method and apparatus by which the printer will be advised at all times of the registering conditions of the machine so that he can stop the press to adjust the parts or not, in accordance with the character of the work which he is doing.

Another object of our invention is to provide an automatic stop for the automatic sheet feeder which stop will be located preferably at the press, and also an automatic press trip, both ,of which preferably will be controlled by electric circuits in the manner to be more fully described hereinafter. With these and other objects in view, our invention consists of the methods and of certain novel features of construction, combination and arrangement of parts as will be more fully described and pointed out in the appended claims.

In the drawings, Figure 1 is a side sectional elevation of a portion of a, well-known type of press to which our present invention has been applied; Fig. 2 is an enlarged elevation. of a portion of our operating mechanism with one .of the members in section; Fig. 3 is a side elevation of a portion of Fig'. 2 and Fig. tisA a vdiagram offour preferred form' of electric circuits which we use in carrying out our inventlon.

c rlhe corresponding parts are referred to l"both-in the specifica-tion and in the drawings White, No. 1,178,563, patented April 11, 1916,

to which the ne detector mechanism disclosed in the application of Joseph White, No. 330,023, tiled @ctober 11, 1919 has been applied, to ether with a coarse detector .mechanism or the front gages, which is ot beam 15 extending across the cylinder 10.v

'lhe usual apparatus for opening and closing the grippers 12 is provided and in Figure 1 the grippers are shown as having just closed on a sheet positioned against the front gages 13. As shown in Figure 1, the front gages are provided with a coarse registering device which consists in the illustrative form of a lower contact member 16 and an upper movable contact member 17, the member 17 being attached to a lever 18 pivoted at 19 and controlled through suitable connections by a cam lever 20 operated by a cam 21 connected to the shaft 60 of the cylinder 10.

Normally, the contacts 16 and 17 are open,

but just prior to the closing of the grippers 12, contact 17 is moved by the cam 21 downward so as to touch ythe contact 16 if there is no sheet placed between them. llt will be noted, however, that because of the shape of the contacts 16 and 17, a sheet may have considerable latitude in its position in relation to the gage 13, and still be capable of holding the contacts 16 and 17 apart. ln other words, a sheet may be considerably out of register and still prevent the operation of the coarse detector constitutedby the contacts 16 and 17.

A line register detector which will have exceedingly small detection limits so as/to be operated when a sheet presented to the gages 13 or taken by the grippers 12 is only slightly out of registered position `is also provided. As a suitable form of such device, we have shown the arrangement disclosed in the said White application No. 330,023, in which a detector blade 22 is pivoted at 23 in the cylinder 10 and weighted by the weight 24: so as to move normally counter-clockwise around 23, ,when permitted 1to do so, to bring the blade 22 against the front edge of' a sheet after the latter has been positioned against the gage 13 and taken by the grippers 12. lt the sheet has been exactly positioned then the arm 25 connected to the blade 22 will fall intothe deep groove 26 on the switch lever 27, this switch lever bein moved in the manner shown in the saidte application so as to move clockacechan wise around its shaft 23 at each cycle ot the press. llt the sheet is not in proper position then the arm 25 will be thrown either too high or too low so as to stop the motion ot the arm 27 in its turning around the shaft 28. @n the cylinder 10 is a pair oi switch Vbars 30, 31 spannednormally by a contact pad on the lever 27. 'lhe bars 30, 31 are in turn respectively connected to bars 32,Y

33 on the exterior ot the cylinder 10 and arranged to contact at a predetermined point in the rotation of thecylinder 10 with a pair ot pins 3d, 35 on the side trame or the machine. When the lever 27 is in the position shown in Figure 1, it will be clear that a current may pass through a circuit which includes the bars 30 and 31, but that it the lever 27 can swing suiciently to the right of Figure 1 so as to clear the bar 30, as will be the case when a sheet has been properly positioned and taken by the ngers 12, then no circuit can be established throughv these bars.

The pins 3d, 3 5 are connected through

wires

36, 37 to the trip-controlling mecha-` actuating member which'A will operate the Y devices which cause the printing couple to separate in the usual manner. 'lhis coupleseparating mechanism has not been illustrated because it is ndt part of our present invention and anyone oil many forms of such apparatus may be used. For instance, the printing couple may be moved apart by the apparatus shown in the prior patent to Joseph lllhite No. 1,112,665, granted @ctober 6, 1914, the rod 40 being moved vertically in the form shown in Figure 2 to raise the operating orlr, shown in said patent,

into position to separatethe printing couple. @n the end of the cylinder 101, constituting the other member of the printing couple, we fasten a cam d1 contacted by a roller i2 on a lever t3 pivoted at l/l and having at its opposite end a trip-controlling lever d5 pivoted at t6 and held in the position shown in Figure 1 by a spring t7 against a stop pin d8. '.lhe lower end ot the rod d() is notched and the upper end of the arm d5 is angled so that when it engages the notch in the rod 410 it will be held therein. lt. will be noted, however, that as the lever 13 is swung to raise the arm d5 upward, the upper end of the arm l-5 will clear the lower end ot the rod t0 when the parts are in the position shown in Figure 2.

'lhe arm 45 has an arm t9-fastened thereto and extending over a pin 50 which is connected to the movable core 51 of a solenoid 52 to which the

wires

36, 37 connected to the pins 311, 35 (see Figure 1) are connected. lt will be understood that a source of power is' placedin this circuit.

When a sheet has been properly positioned lill so that the arm 25 connected to the blade 22 enters the deep slot 26 to permit the lever 27 to swin v to its extreme position to the right of igure 1, nocurrent can pass through thev solenoid 51 because of the break in the circuit between thevbars 30 and 31. On the other-hand, if the sheet has not been properly positioned, then lever 27 vwill be prevented from moving a suicient distance to break the connection between 30 and 31 so that when the bars 32, 33 contact with the pins 34, 35 a current will pass through the solenoid 52 to operate it and to move the pin upward. This motion will take place just prior to the upward motion'of the arm 45 so that the upper end of this arm will now enter the notch in the lower end of the rod 40 to trip the press. As soon as the bars 32, 33 pass the pins 34, 35 the circuit is broken so that the parts are returned to the position shown in Figure 2 for the next cycle commencer.

In the arrangement shown in Figure 1 the sheets are carried to the gages 13, which in this instance are shown as stationary, b

a series of endless tapes engaging pu leys 561, 571, all in the usual manner. Preferably, the sheets are fed to this bank of tapes 55 by any of the well-known automatic sheet separating and feeding devlces, and, as is usual, such automatic sheet feeder will be driven through suitable connecting mechanism from the printing press. ln our illustrative form of machine, this drivlng connection is illustrated as a driving cham 56 engaging a sprocket 57 and turnlng loosel on the center 58, a gear 59 being connecte to the sprocket 57.

Keyed to the end of the shaft 6.0 of the cylinder 10 is a driving member 61 having a driving notch 62. The gear 63 meshing with the gear 59 is loosely mounted to turn on the member 61. On a pin 64 extending through the gear 63 is mounted a driving pawl 65 having a h'ook end which is adapted to engage in the driving notch 62 and' an end opposite the hook which is contacted by a spring-operated pin 66 which tends to turn the pawl 65 counterclockwise on the pin 64. Normally, therefore, the pawl 65 would be in engagement with the driving notch 62 so that the gear 63 would be driven from the shaft to drive the chain 56, and from this the automatic sheet feeder: Loosely mounted on theouter end 'of the gear 63 is a notched member 67 having a slot 68 in which engages a pin 69 attached to an arm 7 0 of the driving pawl. The exterior of the member '67 is provided with a multiplicity of notches, as shown in Figure 2, any one of which is .adapted to be engaged by a stop member 71 mounted to slide toward and away from the notched member 67 and controlled by a lever 72 linked to the movable core 73 of a solenoid 74 which is connected into a circuit, as will be more fully explained hereinafter. When the solenoid 74 is excited the core 73 will be drawn `.up-

suspend the driving of the chain 56 and' stop the automatic sheet feeder until the press operator breaks the circuit through the solenoid 74, in which case the drivingY pawl will be 'again engaged by the notch 62 and the operation resumed.

Preferably, we provide a coarse side relgister detector in the form illustrated in igure 1. On the same shaft with 'the pulleys 571 and at either one or both sides of the ysheet is positioned a contact roller with the surface of which a brush 81 contacts. Above the member 80 is an upper contact member 82 mounted on the end of an arm 83 controlled through proper links by the cam lever 20. The members 80, 82 are interposed in a suitable electric circuit to be described more fully hereinafter, and the member 82 is raised and lowered at appropriate times in the operation of the press. lf a sheet is properly positioned laterally so as to prevent the members 80, 82 from contacting, then no current can pass through this circuit. 0n the other hand, if there is no sheet or if the sheet is so out of place -laterally as not to come between the members 80, 82, then these members will contact and the circuit is closed. This side register device is preferably a coarse one; that 1s, its detection limits are such as to permit a considerable variation in the position of the sheet without ailecting the operation or nonoperation of the detector. In other words, it is of the same characer as the coarse front sheet detector made up of the contact-s 16, 17.

The front gages 13 in the form illustrated are mounted on a shaft 85 connected through suitable links with the cam lever 86 operated by a cam 87 attached to the shaft 60 so as to swing these gages out of position when the grippers 12 close, all in the well-known manner. lt will be understood, of course, that any other form of gage may be used in the place of that illustrated, and particularly it should be understood that the ga e 13 may be mounted on a moving chain or e like, as is shown for instance in the prior patent to Joseph White, No. 1,158,761,

granted November 2, 1915.

With the mechanism which we have just described it will be obvious that a sheet presented tothe tapes 55 will first pass the coarse side registerl sheet detector 80, 82,

fand will holdfopen or cause to be closed,

Y 'tact from strilring the lower contact 16, the

Ycircuit through these two contact members mately correctly positioned, then the grippers 12 will close thereon, the gage 13 at the same time swinging ont of the way so that the sheet is now carried by the cylinder 10. Now the lever 27 turns to ermit the blade 22 to swing to the ri ht of igure 1 to contact with the 'onte ge et the sheet as it is held by the its predetermined normal or registered position, contact therewith by the blade 22 will brealr the circuit/through the bars 30, 31, as has been heretofore explained. lf, on .the other hand, the sheet is .not properly positioned under the grippers 12, eit er because the sheet was not properly positioned against the gage 13 or because the grippers 12 did not taire it properly from the gage 13, or for any other reason, then the circuit through the bars 30, 31 remains closed to permit a current to pass 'when the bars 32, 33 contact with the stationary pins 3d, 35.

As has been explained, on some jobs 1t is not necessary to carry out the same operation in the pressv in the event of the sheet not being in tine register, although being in coarse register, as there will be if the sheet.l

were ont ci coarse register, and we provide an arrangement by which the press operator or a supervisor at some distant point may have knowledge or the operating conditions an automatic feeder, so that the press will' be tri pecl when the sheet presented to it is out o register within the limits of the fine detector or within the limits of the coarse detector. In .other words, by our arrangement the press ma be tripped to prevent the printing of vany s eet which is not in ne register. In such connection, however, we provide 'an arrangement by which, if desired, the tripping of the press when a sheet grippers 12. llt thesheet is in ,f'

inedita is outside 'of the detection limits ot the iine detector but within the detection limits ot the coarse detector, will be prevented. Such an arrangement will be used 4where large output is desired'without tine register. We also preferably connect'the detectors with the feed stop so that if the sheets presented 'to the press are so far out'of register as to be outside of the detection limits of the coarse detectors, either front or side, the

further feeding of sheets will be suspended,

the presentation of sheets so far out of 'register being an indication that somethingI 1s grossly wrong with the automatic feeder and itis therefore necessary to suspend its operation and prevent a clogging up of the press. Preferably, we arrange the signalling device so that it is not operated by the coarse detectors, it being suicient to stop the dow of sheets from the automatic detector, which is direct visual evidence t0 the press operator that'something is wrong and needs adjustment.-

ln lFi re 4 we have illustrated a wiring diagram or the illustrative-form of our invention ,in which the solenoids 52 and 7 t, operating respectively the press trip and the feeder stop, are indicated diagrammatically. 'lhe switch 130 is the equivalent of the circuit making and breaking arrangement shown in Figure 1 as being controlled by the lever 27. Switch 180 is the equivalent of the side register circuit making and breaking contacts 80, 82 of lFi urel. Switch 117 is the equivalents oi t e coarse front sheet detector made up ot the contacts 16 and 17 of Figure. 1. The/source of current is` indicated by the mains X, Y, and switches 101', 102 represent the usual main-starting switches for the operation ot the press. Switch 103 indicates diagrammatically a hand-operated switch for stopping the automatic sheet feeder when it is desired to operate the press without sheets as is done in preparing Iprinting forms for the job, and switch 104 is a switch controlled by the usual two-sheet detector. We have not illustrated such a two-sheet detector, but any 'ot the usual types of such detectors may be used. 105 represents a signallin device which may be either a lamp or a ell and which may be located directly on the press and in fact on some of the moving parts thereof, but preferably will be stationary, and it desired, may be' placed a considerable distance from the press. 106 is a snap switch in the tine detector circuit, and 107 is a snaw switch in the circuit of the ne detector the signalling device 105. 108 is a composite lto some of the circuits and normally closed as to others, as will be explained hereinafter. Assuming that the press is provided with the complete apparatus which we have just Cil Cil

' v tacts indicated, and to open the two lower contacts. A circuit will now be established from the rmain Y through the wire 110, the switch 102, the switch 108, the wire 114, the switch 101, the wire 115, the solenoid 74 and the'wire 116. lhe solenoid 74 will thus be actuated to operate the automatic sheet feeder stop. At the same time a circuit will be established from the main Y through the wires 110, 111, the switch 180, the wire 116,

the switch 108, the wire 118, the lsolenoid 52 and the wire 119 to the main X. The solenoid 52 will operate the press trip to separate the printing couple. Similarly, if the sheet is within the detection limits .of the coarse side register detector and is out of the detection limits of the coarse front sheet detector represented by the contacts 16 and. 17, then the switch 117 which is the equivalent of the contacts 16, 17 of Figure l, will be closed and the same operation will take place since, as will appear from Figure 4, switches 117 and 180 are in parallel between the wires 111 and 112.

Assuming. however, that the sheet presented is within the detection limits of the coarse side and front detectors, then the switches 117 and 180 will remain open and the sheet feeder will continue in operation and the printing couples in contact. If, however, after -the sheet is taken by the grippers 12 the front edge is out of the 'de- 'tection limits of the fine sheet detector, then switch 130 will be closed to establish a circuit from the main Y through the wires 110` 111, through switch 130, the wire 120, and through the

switches

106 and 107, both of which usually will be closed, and from the switch 107 through the ,signalling device 105 through wire 121. to switch 108 and the wire 123 tothe main X. The signalling device 105 will, therefore, be actuated if the sheet is outside of the detection limits of the ine detector. Similarly, the current will fiow through the switch 106, the wire 122 and the wire 118 to the solenoid 52 and from thence through the wire 119 to the main X to trip'the press.

With the arrangement described, it will be seen .that the signalling device will opv, erateuonly when the sheet is outside of the v detection limits of the fine detector but lwithin the detection limits of the coarse detectors, that the press will be tripped if a sheet' is outside of'the detection limits of any one ofthe detectors and that the automatic sheet feeder will be stopped only when the sheet 1s outside of the detection of one of the coarse detectors.

By opening switch 106, the operation of the switch 130 will be suspended so far as the tripping ofthe press when sheets are presented which `are in coarse register but not in line register. If at this time the switch-107 remains closed, then the signalllng device will operate as before. In other words, the sheets will be printed whether in or out of fine register, but the printer will be advised at all times whether or not the sheets are in register. Consequently, if the out-of-register condition persists he can then stop the press and readjust, if he desires to do so. If, on hathe other hand, only an occasional sheet is out of line register, he, may continue the operation of the machine/if the work is not such as to require fine register. Similarly, by opening the switch 107 the operation of the signalling device can be suspended at any time.

The solenoid 74 controlling the sheet feeder is also in a circuit including the switch 103 so that when this switch is closed,

Y as by hand, the operation of the feeder ma be suspended at any time Without suspen lng the other operations of the press. The two-sheet detector switch 104 is also normally open but; will be closed when two sheets are fed at a time to actuate the solenoid 74 in a manner similar to the closing of the switch 103.

While preferably we operate our signalling device and also the vfeeder stop and press trip by means of the circuits which we have illustrated and described, it will be understood that any other forms of connections between'the detectors and the various operating parts of the press may be used. It will also be obvious that if desired a ine sheet detector may be applied to the side register of the sheets as well as to the front register as illustrated. It will be also understood that the arrangement of circuits may be widely varied to carry out our invention and that the one which we have described is merely illustrative.A

By placing the sheet feed stop adjacent the point of drive from the press, all of the operating parts of the feed are suspended which would not be the case if such disconnection took place at the front.

It will be understood that, while we preferably operate the line detector to. contact with the sheet after the grippers are closed on it, such detector maybe arranged to contact with the sheet as it rests near or against the sheet front gage, whether this latter is of the stationary form illustrated, or moving` with the sheet.

While we have illustrated' separate coarse deteetorn'itshonld he understood that he ctionsot the two detectors may loe combined in one device., Thus the detector blade may he arranged to cause a switch blade to contact `with a pairoi short harfsr,so that when the sheet contacting with Acontant withthe hars hy thesheet or is lld is open .if the sheet is ontside the detection moved through its entire throw and'od the hars when the sheet is properly against the gage. 'ln other words, the detector and l switch will he arranged so that the switch limits of coarse detection and Wit the -limits of tine detection, lont Will he closed when it isV between the two. Similarly, either in combination `1with the foregoing or separately, the blade, `when within the ne detection limits hut not in registersd position, may he made toclose a switch to operste the signag device and the trip or each separately,`and when outside the coarse detection limits, may he made to close another switch to operate the feed stop and the trip or either oi them separately. lt should he understood, therefore, that Where, in the following claims, we specify a coarse register detector and a Ene register detector, We do not Wish to he limited to entirely separate devices, but intend to include any arrangement hy which the position ont a sheet in relation to two predetermined limits isascertained.

l. rlhe method of operating a printing press which consists in presenting a sheet to the press, determining its relation to the press gage and giving a signal only when the sheet is nearer than predetermined large distance o'm the gage and farther than a predetermined mailer distance from the gage.

2. 'lhe method of operating a printing `.press which consists in presenting a sheet to the press, determining its relation to the press gage, givinga signal and separating the printing couple when the sheet is nearer than a predetermined large distance from the gage'and farther than a predetermined small distance from the gage, and only separat the printing couple when a sheet is farther thanthe predetermined large distance trom the gage.

3. The method oi operating Aa printingV press which consists in presenting a sheet to the press, determining its relation to the press gage, giving a signal when the sheet is nearer than a pnedetermined large distance from the gage and farther than a predetered small distance from the gage, and separating the printing couple when a sheet is farther than the predetermined large distance from the gage.

d. 'lhe method of operating a printing press having an automatic sheet feeder which consists in presenting a sheet to the press, determining its relation to the press gage, only giving a signal and separating the printing couple when the sheet is nearer than a predetermined large distance from the age and "farther than a predetermined sma distance from the gage and only separating the printing couple and stopping the automatic feeder when the sheet is farther than the large distance from the gage.

5. The method of operating a printing press having an automatic sheet feeder 'which consists in presenting a sheet to the press, determining its relation to the press gage, giving a signal when the sheet is nearer than a predetermined large distance from the gage and farther than a predetermined small distance from the gage and separating the printing couple and stopping the automatic feeder when the sheet is farther than the large distance fromv the gage.

t. rllhe. method of operating a printing press havingan automatic sheet feeder which consists in presenting a sheet to the press, determining its relation to the press gage, only giving a signal when a sheet is nearer than a predetermined 4large distance from the gage and farther than a predetermined small distance from the gage and only stopping the automatic feeder when the sheet is farther than the predetermined large distance from the gage.

7. The method of operating a printing press having an automatic sheet feeder which consists in presenting a sheet to the press, determining its relation to the press gage, only separating the printing couple when the sheet is less thana predetermined large distance from the gage and farther than a predetermined small distance from the gage and only separating the printing couple and stopping the automatic feeder when the sheet is farther than the large distance from the gage.

8. ln a printing press, a sheetv detector, a signalling device, connections between the detector and the signalling device, and means, controlled -hy the detector, to actuate said connections to operate said signal only when a sheet presented to the press is less than a predetered large distance and greater than a predetermined small distance from the predetermined normal position of the sheet.

9. ln a printing press, a coarse register sheet detector, a ne register sheet detector, a signalling device, connections between each ot the detectors and the signalling device, and means, controlled by the detectors, to actnate said connections to operate said signal only whep a sheet presented to the press is iur outside the detection of the tine detector and within the detection limits of the coarse detector. A 10. In a printing press, aA coarse register .sheet detector. a line register sheet detector,

a device,.'an electric circuit including said signallingL device, end means, controlled by the detectors,. to energize. said circuit to operate said signalling device .only

when a sheet presented tothe press is outside the detection limits of the line detector and Within the detection limits 'of the coarse detector.

11; In a printing press, a coarse register sheet detector, a fine register sheet detector, a signalling device, and an electric circuit including the signalling device, a rst switch controlled by the fine etector, and a second switch controlled by the coarse de-tector, the

` lf'switches being arran ed to close the circuit to operate the`-A signa ing device only when a sheet presented to the press is outside the detection limits of the fine detector' and within the detect-ion limits of the coarse detector. l

12. In a printing press, a coarse register sheet detector, 'a line register sheet detector, a signalling device, and an electric circuit including the signalling device, .a first switch controlled by the fine detector, andl a second switch controlledl by the coarseA detector, the iirst switch being normally open and arranged to be closed when a sheet presented to the press is outside the detection limits of the line detector, and the second switchl being normally closed and arranged to be opened when such sheet is Voutside the detection limits of the coarse detector.

13. In a printing press, a moving sheet conveyor, a coarse register sheet detector, a line sheet detector on the conveyor, a stationary Vsignalling device and connections therebetween constructed and arranged to operate the signalling device only when a sheet presented to the conveyor is outside the detect-ion limits of the line detector and within the detection limits of the coarse detector.

14. In a printing press, a moving sheet conveyor, a stationary coarse register sheet detector, a ine sheet detector on the conveyor, a stationary signalling device and connections therebetween constructed and arranged to operate the signalling device only when a sheet presented to the conveyor is outside the detection limits of t-he tine. detector and within the detection limits of the coarse detecter.

15. In a printing press, a sheet conveyor, a coarse register sheet detector and a fine register sheet detector, the coarse detector being arranged to contact with a sheet on the conveyor before the sheet contacts with the fine detector, a signalling deviceand connections' vice constructed and arranged to operate the slgnalling' device only when a sheet on the conveyor is outside the detection limits `of the fine detector and within the detection limits of the coarse detector.

16. In a printing press, a sheet conveyor, a coarse register sheet detector and a fine register sheet detector, the coarse detector belng arranged to contact with a sheet on the conveyor before the sheet contacts with the 'fine detector, a signalling device and an electrlc circuit including the signalling device, thelcircuit being arranged to be whenasheet on'the conveyor is outsi e the I detection limits ofthe coarse detector and \to 'be closed to operate the signalling device limits of the coarse detector and voutside the detection limits of the fine detector.

17 In a printing press, a press trip, a coarse register sheet detector, a line register sheet detector, a signalling device and connections therebetween constructed and arranged to operate only the press trip when a. sheet presented to the press is outside the detection limits of both the line detector and the coarse detector and to operate only the signalling device when such sheet is Within the detection limits ofthe coarse detector and outside the detection limits of the iine detector.

1,8.-In a printing press, a gpress trip, a coarse register sheet detector, a. fine register sheet detector, a signalling device and connections. therebetween constructed andl arranged to operate only the press trip when a sheet presented to the press is outside the detection limits of both the fine detector and the coarse detector and to operate both the signalling device and the press trip when such sheet is within the detection limits of the coarse detector and outside the detection limits of the fine detector.

19. In a printing press, a press trip, a coarse register sheet detector, a fine register sheet detector, a signalling device and connections therebetween constructed and arranged to operate only the press trip when a sheet presented to the press is outside the detection limits of both the line detector and the coarse detector and to operate both the signalling device and the press trip when such ,sheet is detection limits of the coarse detector and outside the detection limits of the fine detector, and means under the control ofthe operator whereby the operation of the press trip may be suspended when such sheet is outside thedetect'ion limits of the fine detector but Within the detection limits of the coarse detector. f

20. In a printin ress, a sheet detector, a press trip, a sign 1mg device, and connections therebetween constructed and arranged to operate only the press trip when a sheet opened lIO within the Bil . detection limits of both the nel detector anddetermined small distance from such normal position.

`2l. ln a printing rese, a' sheet detector, a press trip, a sign ling device, and connections therebetween constructed and arranged to operate only the press trip when a sheet presented to the press is farther than a predeteined i distance `from the predetermined norma position oi the sheet and to operatethe signalling device when the sheet is nearer than such large distance but farther than a predetermined small distance from such normal position. y

22. lln aprinting ress, a sheet detector, a press trip, a signa ing device, and connections therebetween constructed and arranged to operate only the prem trip when a sheet presented to the press is farther than a predetermined large distance from the predetermined normal position of the sheet and to operate both the signalling device and the press trip when the sheet is nearer than such large distance but farther than a predetermined small distance from such normal position, and means under the control of the operator whereby the operation of the press trip may be suspended when such sheet is nearer than such large distance but farther than such small distance from such normal position.

23. lln a printing press, a press trip, a coarse register sheet detector, a ne register sheet detector, a signallin electric circuit including t e signalling vice and the press trip and construed arranged to operate only the press trip when a sheet presented to the press is `outside the electric circuit including the signalling device and the trip and a tirst switch controlled by the line detector and a second switch controlled by the coarse detector, and a second electric circuit including the trip and the ne detector switch, the switches being arranged to close the rst circuit to ,operate the trip and the signalling device when a sheet presented to the press is outside the detection limits of the line detector and Within the detection limits of the .i detector and to close the second circuit to operate the trip when Such t is outside device, and an needles the detection limits ol' either the coarse or of the nue detector.

25. ln a printingpress, a press trip, a.

coarse register sheet detector, a line register sheet detector, a device and cony nections therebetween constructed and arran to operate only the press trip when a sheet presented to the press is outside the detection limits of both the fine detector and the coarse detector and to operate only within the detection limits of the coarse cietector and outside the detection of the tine detector, and means under the control of the operator whereby the operation of the press trip may be suspended when such. sheet is outside the detection limits of the line detector but Within the detection limits Vof the coarse detector.`

26. ln a printing press, a press trip, a coarse register sheet detector, a fine register sheet detector, a signalling device,and an electric circuit including te signallin device and the press trip and constru and ari-an to operate only the press trip when a sheet presented to the press is outside the detection limits of both the ne detector and the coarse detector and to operate only the signalling device when such sheet is within the detection limits of the coarse detector and outside the detection ts of the fine detector, and a d-ope-rated switch Wheref loy the operation of the press tri may be suspended when such sheet is outsie the detection limits or the ne detector but Within the detection limits of the coarse detector.

27. lln a printing press, an automatic sheet .feeder having a drive stop, acoarse register and arranged to operate the drive stop when a sheet presented to the press is outside the detection la of the coarse detector and to maintain vthe feeder drive in operation when such sheet is Within the detection limits of the coarse detector and: outside the detection limits of the tine detector.

28. ln a printing press, an automatic sheet feeder having a drive stop, a coarse register sheet detector, a due register sheet detector, and an electric circuit including the drive stop and constructed and arra to operate the drive stop vwhen a sheet presented to the press is outside the detection limits of the coarse detector and to maintain the feeder drive in operation 'when such sheet is within the detection limits of the coarse detector and outside the detection limits of the tine detector.

29. ln a printing press, an automatic sheet feeder having a drive stop, a coarse register sheet detector, a ne register sheet detector, a press trip, and connections therebetween constructed and arranged to operate the drive stop andthe trip when a sheet pre- Athe signalling device when such sheet is lll) im y

sented to the press is outside the detection limits of the coa-rse detector and to operate only the press trip when such sheet is within the detection limits, of the coarse detector and outside the detection limits of the fine detector. s

30. In a printing press, an automatic sheet feeder having a drive stop, a sheet detector, a press trip, and connections therebetween constructed and arranged to operate the drive stop and the trip when a sheet presented to the press is farther than a predetermined large distance from the predetermined normal position of the sheet and to operate only the press trip when such sheet is nearer than such large distance but farther than a predetermined small distance from such normal position.

31. In a printing press, an automatic sheet feeder having a drive stop, a coarse register sheet detector, a fine register sheet detector, a press trip, and a first electric circuit including the press trip and a switch controlled by the fine detector, a second electric circuit including the press trip and the drive stop and a switch controlled by the coarse de tector, the switches being arranged to close the first circuit to Operate the press trip when a sheet presented to the press is outside the detection limits of the fine detector and within the detection limits of the coarse detector and to close the second circuit to operate both the trip and the drive stop when such sheet is outside the detectionlimits of the coarse detector.

32. In a printing press, an automatic sheet feeder havlng a drive stop, a. coarse register sheet detector, a fine register sheet detector, a press trip and a signalling device and connections therebetween constructed and ar ranged to operate only the drive stop and the press trip when a sheet presented to the press is outside the detection limits of the coarse detector and to operate only the press trip and the signalling device when such sheet is within the detection limits of the coarse detector and outside the limits ofthe iine detector.

33. In a printing press, an automatic sheet feeder having a drive stop, a sheet detector, a press trip, a signalling device and connections therebetween constructed and arranged to operate the drive stop and the press trip when a sheet presented to the press is farther than a redetermined large distance from the pre etermined normal position of the sheet and to operate the press trip and the signalling device when such sheet is nearer than such large distance but farther than a predetermined small distance from such normal position.

34. In a printing press, an automatic sheet feeder having a drive stop, a sheet detector, a signalling device and connections therebetween constructed and arranged to operate a predetermined small distance the drive sto whenv a sheet presented to the istance from the predetermined normal position of the sheet and to operate the signalling device when such sheet is nearer than such large distance but farther than from such normal position.

35. In a rinting press, an automatic sheet feeder-havlng a drive stop, a coarse register sheet detector, a fine register sheet detector, a press trip and a signalling device and a first electric circuit including the drive sto and the press trip and a switch controlled by the coarse detector, and a second electric circuit including the press trip and the sig-A nalling device and a switch controlled by the fine detector, the switchesebeing arranged to close the first circuit to operate the drive stop and the trip when a `sheet presented to the press is outside the detection limits 'of the coarse detector and to close they second circuit to operate the trip and the signalling device when such sheet is Within the detection limits of the coarse detector and outside the detection limits of the fine detector,

36. In a printing press, .a coarse sheet register detector, ay fine sheet register detector, an electric circuit including an operating device and a normallyl closed switch controlled by the coarse detector and adapted to be opened when a sheet presented to the press is outside the detection limits of the coarse detector, and a normally open switch controlled by the line detector and' adapted to be closed when such sheet is outside the detection limits of the fine detector.

37. In a printing press, a coarse sheet register detector, a tine sheet re 'ster detector, a first electric circuit inc udin an operating device and a normally c osed switch, a second circuit including a solenoid arranged to open the normally closed switch when the second circuit is closed, and a normali open switch controlled by the coarse etector and arranged to be closed when a sheet presented to the press is outside the detection limits of the coarse detector, the first circuit having a normally open switch controlled by the ne detector and arranged to be closed when such sheet is outside'the detection limits of the fine detector.

38. In a printing press having an automatic sheet feeder, a driving member on the press, a driven member, connections between the driven member and the feeder, a clutch pawl carried by the driven member and normally engaging the driving member, an operating member normally moving with the driven member and capable of independent motion in relation thereto, a connection between the last-named member and the pawl, the last-named member being press is fart er than a predetermined large loo provided with notches and a detent adapted to be moved into engagement with one of the notchesto retard the last-named member, whereby the pawl is disengaged from Feeder while the driving member to stop the the press continues in motion.

39. ln a printing press having an automatic sheet feeder, a driving member on the pressgaidriven member, connections be- ,tween the driven member and the feeder, a

clutch pawl 'carried by the driven member` and normally Iengaging the vdriving mem` i ber, an operating member normally moving withl the driven member and capableA oil independent -motion in relation thereto, a connection between thev lasti tfd member and the pawl, the last-named tion, a solenoid connected to the detent, and

means to energize the solenoid to move the detent into engagement with one of the notches. f

40. lin a rinting press having an automatic sheet feeder, a driving member on the press, a driven member, connections between the driven member and the feeder, a movable clutchingv member between the driving and dri-ven members and carried by the driven member, a circular member normall movingwith the driven member and capa le of independent rotation in 'relation thereto, the circular member having a plurality of notches extending around its periphery, connections between the clutching member and the circular member adapted to move the clutching member out of clutching engagement when the circular member is rotated relatively to the driven member and a detent 'adapted to enter any v pivoted Macnee one of the notchesy aud retard the rotation of the circular member, whereby the operation ot the feeder maybe stopped at any point in the cycle of the press.

41. ln a printing press, a press trip-operating meansincluding a trip-'operating member, an actuating device operating at each cycle of the press-and normally out of position to engage with said member, a solenoid arranged to move said device into engaging positlon when the solenoid is operated, a sheet detector and an electric circuit including the solenoid and a normally open switch arranged to be'closed when a sheet is outside the detection limits of the detector.

42, ln a printing ating means inclu ing a trip-operating member, a reciprocating actuating device normally out of position to engage with'said press, a press trip-opermember, a solenoid arranged to move said4 device into engaging position when the solenoid is operated, a sheet detector and an.

electric circuit includin the' solenoid and a normally open switcgh arranged to be closed when a sheet is outside the detection limits oi'f the detector.

t3. ln a printing press, a'press trip-oper- I ating means including a trip-operating member, an actuating device operating at each cycle of the press and normally out oi position to engage with said member, a reciprocating actuating' device normally out of position to engage with said member, a solenoid arranged to turn saiddevice on its point into engaging position when the solenoid is operated, a sheet detector and an electric circuit including the solenoid and a normally' open switch arranged to be closed when a sheet is outside the detection. limits of the detector.

JSEPH WEMPE. WlLLlAM ECKHARD.