US961585A

US961585A - Paper-feeding machine.

Info

Publication number: US961585A
Application number: US44275308A
Authority: US
Inventors: Talbot C Dexter
Original assignee: Dexter Folder Co
Current assignee: Dexter Folder Co
Priority date: 1908-07-09
Filing date: 1908-07-09
Publication date: 1910-06-14
Anticipated expiration: 1927-06-14

Description

Patented June 14, 1910.

8 SHEETS-SHEET l.

T. C. DEXTER.

PAPER EEEDING MACHINE.

APPLIOATION FILED JULY 9,1908.

Panted June 14, 1910.

8 SHEETS-SHEET 2.

A n, W5

r @krom/e136 4 T. G. DEXTER.

PAPER FEEDING MACHINE.

APPLIOATON FILED JULY 9,1908. 96 1,585. Patented June 14, 1910.

8 SHEETS-SHEET 3.

T. C.- DEXTER, PAPER Emmer MACHINE.

PLIOATION FILED JULY 9,1908. 961,585. Patented June 14, 1910.

8 SHEETS-SHEET 4.

T. EXTER.

PAFER PEEDING MAGHNE.

APPLIUATIDN FILED JULY 9,1908.

` Patented June 14,1910.

SHEETS-SHEET 5.

@www 1x1/what ...www H f T. G. DEXTER.

PAPER EEEDING MACHINE.

APPLICATION FILED JULY 9,1908. 961,585.

Patented June i4, 1910.

8 SHEETS-SHEET 6.

x E QQ @gi/hammam M mm. w Q

T. G. DEXTER.'

PAPER FEBDING MACHINE.

APPLIOATIGN FILED JULY 9,1908. A

Patented June14,191o.

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ANDREW a www co. Pnoraunoampnzns. v/AsmNGTO T. G. DEXTER. PAPER PBEDING MACHINE.

- APPLICATION FILED JULY'9, 1908.

Patented June v14., 1910.

UNITED STATES PATENT liTTtl/E.

TALBOT C. DEXTER, OF PEARL RIVER, NEVI YORK, ASSEGNO?, TO DEXTER FOIIDER COMPANY, 0F PEARL RVER, NEW YORK, A CGBPC'RATION OF NET/i7 YORK.

PAPER-FEEDING MACHTNE.

To all 'whom it may concern.'

Be it known that T, TALBOT C. DEXTER, a citizen of the United States, and a resident of Pearl River, in the county of Rockland and State of New York, have invented certain new and useful improvements in Paper-1F` ceding Machines, of "which the following is a specification.

My present invention relates generally to improvements in paper feeding machines, and particularly to feeding machines of the sheet combing type, in which the pile of sheets is acted upon by combing feeding devices Which comb or feather out the top sheets of tl pile to gradually separate the successive sheet-s near the top so they may be drawn from the pile periodically and fed to any machine arranged to operate upon the individual sheets.

In combing feeding machines as heretofore constructed, the operation of the combing instruments has been controlled by suitable sheet actuated devices. Tn some cases the combing instruments are continually7 rotated and thrown into and out of operation by moving them into and out of engagement With the pile of sheets. ln other machines the combing instruments are controlled through suitable sheet actuated devices, Which arrest their movement Without raising them aivay from the pile of sheets, in Which case it is necessary to so arrange the combing devices that they will rest just behind the rear edge of a separated and registered sheet when their motion is stopped so that the top sheet Will be free for the operation of the delivery mechanism, and the next under or second sheet Will be engaged and held against motion when the top separated sheet is drawn off by the delivery mechanism. ln both of these forms of feeding machine just referred to, it is necessaryT to the successful operation of the machine, that some means be provided for holding the separated sheet during the interval elapsing between the arrest of operation of the combing devices and the engagement of the separated sheet by the delivery mechanism. rThis means for holding the separated sheet during the stated interval has, in the past, been in the form of a sheet engaging arm operating alternately With the combing devices, or lingers or straps, resting continually upon the top sheet of a combed out pile. The necessity for such devices for holding Speccaton of Letters Patent.

.Application led July 9, 1908.

Patented June i4, 1910.

Serial No. 442,753.

the separated sheet during the said interval, is due to the danger of the sheet being shaken out of registered position by the vibrations of the machine, it being essential in such machines to provide a certain interval of time between the arrest of operation of the combing devices and the start of operation of the delivery devices in the normal operation of the machine for the purpose of insuring' a sufficient period of operation for the combing devices to surely separate and place in registered position each successive sheet in spite of the variations in the sheets that are presented to the combing' devices.

The main object of my present invention, is to improve and simplify sheet combing machines of the general type referred to, by providing a mechanism which Will accurately separate the successive sheets and place them in registered position under the control of sheet actuated trippers or gages, Without t-he necessity of providing separate means for engaging and holding the successive separated sheets during the interval elapsing between the arrest of operation of the combing devices and the start of the operation of the sheet delivery mechanism. ln carrying out this main object of my invention, l combine the features of the two old types of machines referred to, and arrange an intermittently operating driving mechanism for the combing devices under the control of the sheet actuated tripping fingers or gages, so that the movement of a sheet into registered position preparatory to the operation of the delivery mechanism, will arrest the operation of the combing devices, Without elevating said devices from the pile, the combing devices remaining in engagement With the separated sheet until the moment of engagement of the sheet delivery mechanism, at Which instant the combing devices are elevated from the separated sheet, and the remainder of the combed outpile is held by suitable tail grips Which are throvvn into engagement With the next under or second sheet of the pile just back of the rear edge of the separated sheet simultaneously with the disengagement of the combing devices and the engagement of the sheet delivery mechanism. As stated above, this arrangement enables me to construct a` perfectly satisfactory and accurate sheet combing machine of a simpler type, in which the combing devices themselves take the place of the auxiliary devices heretofore used for holding the separated sheet in the interval following the arrest of operation of the combing devices above referred to.

In order that my invention may be fully understood, I will first describe the same with reference to the accompanying drawings, and afterward point out the novelty more particularly in the annexed claims.

In said drawings Figure l is a vertical longitudinal sectional view of a paper feeding machine embodying my improvements, showing the sheet combing device in operation. Fig. 2 is a similar view showing the sheet actuated controlling device in tripped position with the comber still in engagement with the pile, but out of operation. Fig. 3 is a similar view taken from the opposite side of the machine, showing in full lines, the parts in the same position illustrated in Fig. 2, and showing in dotted lines the succeeding step in the operation of the machine, in which the comber is elevated and the drop roller delivery mechanism is thrown into action. Fig. 4 is a detail view similar to Figs. 1 and 2, showing parts of the mechanism in the position assumed when the resetting cam comes into play for restoring the sheet actuated tripping mechanism to normal position. Figs. 5 and 6 are respectively detail side elevation and detail edge view of parts of the clutch operating mechanism, Fig. 5 showing in dotted lines a shifted position of some of these parts. Fig. 7 is a plan view of the mechanism shown in Figs. l, 2 and 3, the comber driving clutch being in engaged or operative position. Fig. 8 is an end view of the mechanism the combing wheel being omitted for the sake of clearness. Fig. 9 is a side elevation of the machine showing particularly the relation and operation of the tail grips and sheet combing devices. Fig. l0 is a vertical transverse sectional view showing the comber controlling and operating clutch mechanism. Fig. ll is a vertical sectional view taken on the line X X of Fig. l0. Fig. l2 is a detail plan view illustrating the trains of gears for transmitting power from the driving shaft to the combing wheel.

Sheet feeding machines of the type to which my present invention relates are provided with two sets of sheet moving devices arranged to operate at opposite sides of the machine. In the accompanying drawings, I have shown only one-half of the machine, including only one of these sheet moving devices, but it will be understood that two such devices of the same construction are employed, each being independently controlled by a sheet actuated tripping device, as hereinafter explained.

'Ihe frame-work of my improved machine may be of any suitable construction to properly support the working parts hereinafter referred to.

In the drawings, 1 represents one of the vertical side frames. The side frames are suitably braced to make them rigid by means of stay rods 2, 3, and other frame parts not shown, and within the frame is provided a suitable table or support for carrying a pile of sheets, indicated by the reference letter P.

5 is a constantly driven shaft carrying the lower grooved feed rollers 6, the shaft being braced at intervals by suitable bearing brackets (not shown). The rollers 6 are formed with a peripheral groove 6a into which the sheet actuated tripping lingers project as hereinafter explained.

l0 are the drop rollers journaled in the rock arms 11 mounted upon a transverse rock shaft l2. The drop rollers l() are supported above two or more of the under feed rollers 6, with which they coperate. The rock shaft 12 extends transversely of the machine, above the constantly running lower shaft 5, and is suitably braced between its ends by two or more bracket arms, (not shown), rigidly secured to the auxiliary longitudinal frame pieces or saddles l5. The rock shaft l2 is operated by any of the usual forms of mechanism, whereby the drop rollers l0 are periodically lowered and raised into and out of engagement with the coperating under rollers 6, for performing their function of delivering or feeding off the successive sheets.

The main cam shaft 20 extends transversely of the machine and is suitably journaled in the main side frames l and the auxiliary longitudinal frame pieces l5. This shaft 20 is provided with a driving pulley (not shown), or it may be driven in any other suitable manner, said shaft being the shaft from which all other parts of the machine are driven. Each auxiliary frame piece or saddle 15 is provided with the downwardly projecting bracket arms, indicated at 15a, l5b and 15C, to properly support the main comber operating shaft 25, which is journaled in the lower ends of said bracket arms and in one of the main side frames of the machine. This comber operating shaft 25 is driven by suitable gearing (not shown) from the main cam shaft 2O of the machine.

40 is the combing wheel journaled freely at 42 upon the forward end of the connected supporting rock arms 43, which are freely journaled upon the shaft 25. Formed integral with and projecting upwardly from the connected comber supporting rock arms 43, is a rock arm 44, the upper end of which is pivotally connected at 45 to the rear end of a pitman or link 46, formed between its ends with a horizontal guide loop or slot 47, through which the cam shaft 20 extends for supporting and guiding the pitman. The rear end of this pitman 46 carries an antifriction roller 46a, which runs in peripheral engagement with a cam 48 keyed to the shaft 20 along side of the pitman 46. The purpose of this cam and pitman connection with the comber supporting rock arms, is to intermittently raise the combing wheels from the pile of sheets at times corresponding with the operation of the sheet delivery drop roller mechanism with which the combing wheels cooperate. These cam mechanisms for raising the combing wheels operate independently of the automatic tripping mechanisms, which arrest the operation of the combing wheels without elevating them, it being necessary to provide some such -periodically operating mechanism for the combers to permit the feeding of sheets from the pile at proper times.

The combing wheel 40 has keyed to it upon one face a gear 50 which meshes with a similar gear 51 keyed to a short shaft 52 journaled in the comber supporting rock arm 43 and carrying at its opposite end a similar gear 53 which meshes with and is driven by the gear 54 loosely journaled upon the shaft 25 and in turn driven by a gear 55 keyed or pinned to a clutch shaft 56. This clutch shaft 56 is journaled in forward eX- tensions or arms of the bracket arms 15a, 15b and 15C and carries the automatically controlled clutch mechanism by which the combing wheel is thrown into and out of operat-ion. Journaled centrally upon said clutch shaft 56 and having a bearing partly within the bracket arm 15", is a loose clutch sleeve 60 having formed integral with its inner end a toot-hed clutch member 61 and at its outer end a grooved wheel member 62 carrying a ring of some suitable friction material 03. The loose clutch sleeve 60 also carries between its ends the driving gear 64e, which meshes with and is driven by a gear 65, keyed to the comber driving shaft 25 above referred to. Since this shaft 25 is constantly driven, it will be clear that said sleeve 60 and the parts carried thereby will also be constantly driven, but that inasmuch as the sleeve 60 is loose upon the shaft said shaft 56 will not rotate with the sleeve, excepting when it is clutched thereto, which clutch action is accomplished in the manner which will now be explained. i

71 is the movable member of the comber driving clutch formed upon a hub or sleeve 70, which is splined at 72 to the shaft 56, so as to cause said shaft 56 to rotate with it, but at the same time permit the movement of the clutch 71 longitudinally upon said shaft. This comber driving clutch and the braking clutch presently to be referred to, is thrown into and out of operation by the sheetcontrolled tripping mechanism hereinafter explained. Formed integral with the clutch sleeve 70, is another clutch member 75, which constitutes the movable member of the brake clutch. This clutch member 7 5 is adapted to be moved into clutched engagement with a clutch member 7 6 formed on the inner end of a sleeve 77 journaled upon the shaft 56 within the bearing of bracket arm 15C. This sleeve or hub 77 projects to one side of the bracket arm 15c to receive the adjustable brake band 7S carrying a strap or other friction lining 79 and secured to the bracket arm 15C by means of a finger S0 projecting from said bracket arm and an adjusting screw S7 passing through the radial lugs 82 of the brake band 78.

Secured to the shaft 56 within the recessed inner end of the hub or sleeve 77, is a collar 85 against which abuts the eXpansion spring 86, which engages the movable clutch sleeve carrying clutch member 71 and for tending to throw the clutch meinber 71 into clutched engagement with the clutch member 61. Secured to the extreme inner end of the clutch shaft 50, is a ring or collar 90, confining an expansion spring 01 upon shaftagainst the end of the hub or sleeve 77 of the brake mechanism. The operation of this clutching and braking mechanism for rotatingand stopping the combing wheel, will be hereinafter explained.

A bifurcated arm extends from the bracket arm 15b of the auxiliary frame or saddle and supports at its inner end a short rock shaft 101 carrying an upwardly projecting clutch operating yoke 102 having the inwardly presented blocks or lugs 103, which engage the annular groove in the clutch sleeve 70, so that by rocking the short shaft 101, the

clutch members

71 and 75 may be shifted inwardly and outwardly upon shaft 50. Keyed to the rear end of short rock shaft 101 is a transversely projecting rock arm 105 pivoted at its outer end to the lower end of a pitman 106, which projects upwardly and is pivotally mounted at 107 to a bell crank lever 108, which is journaled upon a pin 109 mounted in the auxiliary frame piece or saddle 15. The forwardly projecting arm 10SaN of the bell crank lever 10S, carries an antifriction roller 108, which is presented in the path of a cam 110 mounted upon the cam shaft 20. The cam 110 is adapted to rock the bell crank lever 108 once in each revolution of shaft 20 for the purpose which will hereinafter be explained.

From the description given above, with particular reference to the clutch mechanism, it will be observed that (S2-63 constitutes a continuously running friction wheel. This friction wheel is the driving member of the automatic clutch throwout, the driven member being under the control of the sheet actuated tripping devices in the manner which will now be explained.

is an arm or lever j ournaled upon the pin 100 along side of the bell crank lever 108. This arm or lever 115 has pivoted to its upper end at 11G a tension-rod 117, which passes forwardly through an opening in a guide bracket 118 and supports between said bracket and an adjustable collar 119, an expansion spring 120. By the action of this spring 120, the arm or lever 115 is held in engagement with the stop 121, which is its normal position for supporting the parts presently to be described. Freely j ournaled at 125 upon the lower end of the arm 115, is a wheel 13() formed with a segmental frictional surface 131 and supported just above the constantly rotating friction wheel 62-63 and normally out of peripheral engagement therewith. This driven wheel .130 carries upon one face the laterally projecting pins 132 and 133, to the former of which is pivotally connected the lower end of a short link or pitman 134 formed at its upper end with a slotted loop 135 in the slot of which engages a pin 136 projecting from the face of the bell crank lever 108. Pivoted to the other pin 133 of wheel 130, is a forwardly extending rod 140 which is pivotally connected at 141 with the sheet actuated tripping lever 142. This tripping finger 142 is freely pivoted to the auxiliary frame piece 15 at 143, and is formed with a forwardly presented weighted arm 144 for holding it normally in sheet engaging position, in which position the vertical gaging face 1423, at its lower end, is presented within the peripheral groove of one of the under feed rollers 6 as shown in Fig. 1 of the drawings. The bell crank lever 108 has a laterally projecting lug or finger 1081, which projects beneath the rearwardly presented angular projection 115b of the pivotally supported arm 115 for the purpose of engaging said arm and rock it upon its pivot to slightly elevate the driven wheel 130 from the driving wheel 62-63 when it is desired to restore the parts to normal position.

Referring to Fig. 9 of the drawings, 150 represents one of a plurality of weighted tail grips having sheet engaging rubber blocks 152 at their lower ends and freely hung upon pivots 153 at the forward ends of rock arms 154 mounted upon a rock shaft 155 which extends transversely of the sheet supporting table and is journaled in the side brackets 156. These brackets 156 are adjustable longitudinally of the machine to present the tail grips 150 in proper alinement to engage the under or second sheet of the pile just in rear of the rear edge of the top sheet. Said rock shaft 155 carries a depending Yrock arm 156, to which is connected at 157 a tension rod 158 passing forwardly through a guide bracket or lug 159 on the inner face of the side frame 156. An expansion spring 160 is confined upon the rod 158 between the bracket or lug 159 and an adjustable collar 161, the action of the spring 160 being to throw the tail grips 150 into engagement with the pile when unrestrained. Thelower end of the rock arm 156 carries an antifriction roller 165, which is intermittently engaged by a tappet block or finger 166 adjustably mounted upon a rod 167 extending longitudinally of the machine at one side and suitably supported in bracket arms, one of which is shown at 168. This longitudinally extending rod 167 supports an expansion spring 169 between the adjustable collar 170 and the bracket arm 168. The forward end of the rod 167 is pivoted at 171 to the lower end of the rock arm 17 2 keyed to a rock shaft 173 carrying an upwardly presented rock arm 174 having journaled in its upper end an antifriction roller 175, which operates in peripheral contact with a cam 176 keyed to the cam shaft 20. The cam 176 has an active high portion of approximately one-half of a circumference in extent, which engages the antifriction roller 175 of the rock arm 174 during half of each revolution of the cam shaft 20, to cause the tappet block or finger 166 to engage the antifriction roller 165 upon rock arm 156 and hold the tail grips 150 raised from the pile of sheets while the combers are operating.

The operation of the machine will be clear from the following description: It being understood that a paper feeding machine embodying my improvements must be provided with two sets of automatic sheetcombing devices as above described, and it being further understood that the machine as shown is particularly designed to operate on a bank of sheets which have been given a preliminary fanning out to partially separate them, such for instance as in machines having the double table communicating through a curved throat; the machine is started in operation with both sets of combing separating devices in the position shown in Figs. 1 and 9. In this position of the parts it will be understood that each driving clutch 61-71 is in operative position so that each combing wheel will be rapidly rotated through its shaft 25, gears 65--64, shaft 56, and gears 55, 54, 53, 51 and 50. At the same time it will be observed that each roller 62-63 is rotating rapidly, and that the driving member 130 of each throwout is supported out of engagement with the friction wheel 63, and that the tripping fingers 142 are in the position shown. It will also be understood that the tail grips 150 are raised above the pile of sheets. The combing wheels 40 continue to comb forwardly the sheets until the tripping fingers 142 are actuated, it being understood in machines of this type that each combing wheel is independently controlled so that its tripping mechanism will be separately operated by the part of the forward edge of the sheet coming into registered position. The operation of both of these mechanisms is identical. As each tripping finger is engaged by the forward edge of the separated Y or combed out sheet the forward movement of the tripping finger 142 will rotate the wheel 130 slightly to bring the segmental frictional surface 181 of said wheel into peripheral engagement with the rapidly rotating friction wheel 68. .As soon as friction wheel 68 is engaged by said segmental friction surface 181, the wheel 180 will be rapidly rotated, with the result that through the link 18d the bell crank lever 108 will be rocked to pull upwardly onA link 106 for throwing the clutch member 71 away from clutch member 61, and simultaneously throw into engagement the braking clutch member 75 with the corresponding brake clutch member 7 6. Immediately after the power is disconnected from the combing wheel, the shaft 56 will be stopped by having the brake 78 clutched thereto. rl`he provision of this brake for arresting the rotation of the combing wheel is important in that it relieves the combing Wheel and its driving mechanism from the shock which it would otherwise be subjected to. Each combing wheel is thus instantly stopped without stopping the driving shaft 25 while the combing wheel is in engagement with the top sheet of the pile when the sheet reaches registered position. This throwout operation also moves the sheet tripping fingers 142 into throwout position as shown in Fig. 2, so that the tripping fingers will be raised out of the path of the sheets. Immediately following the throwing out of the two combing wheels, the cams 48 come into play to elevate the combing wheels from the pile and simultaneously with this operation the drop roller delivery mechanism is operated for engaging the separated sheet and rapidly feeding it away from the pile. Also simultaneously with this operation, the controlling cams of the tail grips permit the tail grips to engage the second sheet just in rear of the top separated sheet for holding the pile intact while the delivery mechanism is taking the top sheet off.

Immediately following the delivery of the separated top sheet, the cam 110 comes into play for moving the bell crank lever 108 slightly farther upon its pivot for the purpose of causing the finger 108b to engage the projection 115b of arm 115, and raise the roller 180 slightly so as to disengage the friction segment 181 from the friction roller 63, and thereby permit the wheel 180 and connected tripping nger 142, to gravitate back to normal position, the slot in the link 185 permitting this return movement. As the bell crank lever 108 is given this nal motion by the action of cam 110, it will be understood that the clutch operating yoke 102 which is positively connected with the bell crank lever 108, must be rocked farther to the left of Fig. 10, which action is permitted by the spring 91, the sleeve 65 yielding in its bearings for this purpose. Immediately following this operation the rotation of the cams 110 reset the clutches for again driving the combing wheels which are again lowered into engagement with the next sheet of the pile and simultaneously therewith the cam raises the tail grips so that the parts will again be in the position shown in F ig. 1 in readiness for a repetition of the described operation. lt will, of course, be understood that the action of the cam 110 in resetting the clutch, will rst permit the arm 115 to return to its normal position under the action of its tension spring 120, said arm returning to its normal position just prior to the re-clutching of the comber driving clutch.

lt is understood by those skilled in the art that it is of great importance in feeding machines to provide means for straightening the successive sheets in registered position just prior to the operation of the sheetdelivery mechanism. ln prior machines this straightening of the sheets has been effected by the action of the sheet moving instrumentat one side of the machine, moving that side of the sheet into registered position while the previously registered side of the sheet is held against movement by engagement with the front gage, the whole sheet being shifted upon said opposite front gage, which acts as a pivot for straightening the sheet. ln my improved machine it will be observed that the automatic sheet controlled mechanism for arresting the operation of the combing wheels at opposite sides of the sheet also serves to raise the tripping fingers out of the path of the sheets, so that these tripping fingers cannot be used as points upon which the leading edge of the sheetis straightened. In other words, as the leading edge of the sheet in front of each combing wheel comes into registered position and actuates the tripping nger atthat side of the pile, the actuated sheet tripping finger is moved out of engagement with the sheet, while the tripping finger at the opposite side of the pile against which the leading edge of the sheet has not been registered, remains in operative position until the sheet at that side of the pile has been moved up to registered position by the continued action of the combing wheel at that side of the pile. This straightening of the sheet is accurately accomplished in my improved machine by reason of the continued engagement of the combing wheels with the pile of sheets after their feeding action is arrested until they are simultaneously raised by the described cam mechanism. This operation takes place in the following manner: As the leading edge of the separated sheet in front of one of the combing wheels reaches and actuates the tripping finger, the tripping finger is moved away from the sheet and the combing wheel l in rear of that actuated tripping Enger is arrested, but still `remains 1n engagementwith the sheet. The combing wheel at'the opposite side Vof the machinefcontinues to operate until it moves the leading edge of the sheet in front of it into registered position, the whole sheet turning under the first arrested combing wheel, which acts as a pivot upon which the separated sheet turns until the leading edge of the sheet actuates the second tripping finger and arrests the operation ofthe second combing wheel.

From the above explanations it will be observed that thecombing wheels in my improved machine perform two important functions in addition to their function of feeding and separating the sheet, in that they hold the separated sheet during the interval between the arrest of the feeding operation and the start of the delivery operation, and further act independently as pivots upon which the successive separated sheets may be straightened prior to being delivered from the machine.

While the foregoing description emphasizes the action of the combing wheels vin engagement with the pile after their feeding motion has been arrested, as mainly for the purpose of holding the separated sheet until the sheet delivery mechanism operates, it will, of course, be understood that the arrested combing wheels in fact :hold the entire combed out pile of sheets during this interval so as to avoid the danger of the vibrations of the `machine shifting any part of the pile within the influence of the combing wheels.

It will be observed from this description of the construction `and operation of my improved machine that I have produced an automatic combing feeding machine, in which the operation of the comber is such that it will do away with the Anecessity of the holding fingers or clamps, which in the past have been found necessary to hold the top separated sheet of a pile during the interval elapsing between the arrest of operation of the combing devices and the start in operation of the sheet delivery mechanism.

What I claim is:

l. In a paper feeding machine, the combination of a sheet support, a rotary sheet separating instrument, driving mechanism for said separating instrument, a brake for stopping said instrument, a clutch mechanism for coupling said instrument with said driving mechanism or said brake, and a sheet actuated device controlling said clutch mechanism.

2. In a paper feeding machine, the combination of a sheetl support, a rotary sheet feeding instrument, driving mechanism for said instrument including a clutch shaft, a brake, a clutch `upon said clutch shaft adapted fto connect Yor disconnect said driving mechanismrand clutch shaftrand saidiclutch shaft and bralre,an`d a'sheetfactuated .device controlling saidclutch.

3. In a paper feeding machine, thezcombination/of a sheet-moving instrument, with a driving shaft, mechanism drivenfby said shaft for operating said instrument, a moving frictionalsurface, a sheet-'controlled frictional member arranged to be thrown into engagement with said frictionalsurface lby the actionof a/sheet and tobe actuated'by said frictional surface, andfmeans .actuated by said sheet controlled frictional member adapted to arrest the operation of said instrument without stopping said shaft.

4. AIn-a paper feeding machine, the combination of a sheet support, a sheet .feeding instrument, driving mechanism including a shaft, a brake for arresting the operation of said instrument, a rotating friction wheel, a cooperating friction'device adapted to be thrown yinto .engagement with said rotating wheel, a sheet actuated device controlling said friction device, and brake operating meansrendering inoperative said shaft and connecting said .friction device with ysaid brake.

5. Y'In a paper `,feeding machine, the-combinationof a sheet support, a sheet moving instrument, a driving shaft, mechanism driven bysaid shaft for operating Ysaid -in strument, a brake for arresting the operation ofsaid instrument,a moving frictional surface, a sheet controlled frictional ymember arranged to be thrown finto engagement withsaid frictional surface by theaction of a sheetlto be actuated bysaid frictional surface, and 'brake operating means rendering inoperative said sha-ft and Iconnecting said frictional member with said .brake for arresting the operation of said instrument without stopping said shaft.

6. In a paper feeding-machine, fthecombination of a sheet support, a sheet moving instrument operating above saidsupport, a

drivin()` shaft, mechanism ydriven by said' shaft r2for operating said instrument, xa -rotating friction wheel, a cooperating ffriction device 4adapted to be Ythrown 4into engagement with said friction wheel, a sheet actuated device controlling said friction-device, a brake for arresting the operation ofsaid instrument, means connecting said friction device with said brake, and means for-automatically restoring the parts to foperative position.

7. In a paper feeding machine, the/combination of a sheet movinginstrument, with a driving shaft, mechanism driven by said shaft for operating said instrument,a brake for arresting the operation of said instrument, a moving frictional surface, a sheet controlled frictional member adapted l'to be thrown into engagement with said frictional surface by the action of a sheet to be 0perated thereby, means connecting said sheet controlled frictional member With said brake, a movable support for said sheet controlled frictional member, and means for periodically moving said support for disengaging said frictional member from said moving frictional surface and restoring the parts to operative position.

8. ln a paper feeding machine, the ccmbination of a sheet support, a sheet feeding instrument, driving mechanism therefor, a brake for arresting the operation of said instrument, a rotating friction Wheel, a sheet controlled segmental frictional surface adapted to be moved into engagement With said rotating friction Wheel, and means rendering inoperative said driving mechanism and connecting said sheet controlled segmental frictional surface With said brake.

9. in a paper feeding machine, the combination of a sheet support and a sheet feeding instrument, With a driving shaft, mechanism driven by said shaft for operating said instrument, a rotating friction Wheel, a sheet controlled Wheel having a segmental frictional surface adapted to be rotated into engagement With said rotating friction Wheel, a movable support for said sheet controlled Wheel by which it may be moved bodily aivay from said rotating friction Wheel, and means actuated by said sheet controlled Wheel adapted to arrest the operation of said instrument Without stopping said driving shaft.

l0. in a paper feeding machine, the combination of a sheet support, a sheet feeding instrument, driving mechanism therefor, a brake for arresting the operation of said instrument, a rotating friction Wheel, a sheet controlled segmental frictional surface adapted to be moved into engagement with said rotating friction Wheel, a brake operating lever, means operated by said lever for rendering said driving mechanism inoperative, and a limi connecting said lever with said sheet controlled segmental frictional surface.

ll. ln a paper feeding machine, the combination of a sheet support, a sheet feeding instrument, driving mechanism therefor including a shaft, controlling mechanism adapted to arrest the operation of said instrument Without stopping said shaft, a rotating friction Wheel, a sheet controlled segmental frictional surface adapted to be moved into engagement vvith said rotating friction Wheel, a link connecting said controlling mechanism With said sheet controlled frictional surface and a resetting cam acting upon said controlling mechanism and c0nnected parts.

l2. In a paper feeding machine, the combination of a sheet support, a sheet feeding instrument, driving mechanism including a clutch, a rotating friction Wheel, a sheet controlled Wheel having a segmental frictional surface adapted to be moved into engagement With said rotating Wheel, a clutch 0perating lever, a linlr connecting said lever With said sheet controlled tvheel, and a resetting cam adapted to engage said lever.

13. In a paper feeding machine, the combination of a sheet support, a rotary sheet separating instrument, driving mechanism including a clutch, a rotating friction Wheel, a cooperating friction device adapted to be thrown into engagement With said rotating Wheel, a sheet actuated device controlling said friction device, a clutch operating lever, and a link pivoted to said friction device and having pin and slot connection With said lever.

TALBOT C. DEXTER.

Vitnesses:

A. C. HAMMOND, LENA J. TYGERT.