US2149130A - Sheet feeder - Google Patents

Description

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" l.. BAKER SHEET FEEDER Filed July 25, 19:55` '-3 Sheets-Sheet l mvp. wm

m. m m m Feb. 2s, 1939;'

Leonard Bake/f'.

44M ya ATTORN L. BAKER SHEET FEEDER Feb. 28, 1939.

3 Sheets-Sheet 2 Filed July 25, 17935 5 NVENTOR Leonard Baker' ATTO L. BAKER SHEET FEEDER Feb. 28, 1939.

Filed July 25, 1935 s sheets-sheet s ...l.,.. Re. 0K Y EMM JWM .IP WIA 2m.. o d

Patentes Feb. 2s, 1939 UNI-Tfno s'rArl-:srA'rsNr oFfrlcE reemrannker,nlnesue,1v.r..mlmnem ter Foldercompony, New York, N. Y., a corporation of New York Applicaties .my 25.19.15, sei-m No. sanz'- zo chime. (ci. zii-sz) invention vrelates te sheet feeders, and while capable of general use. is more particularly adapted for embodiment in feeders that move a a supply of sheets during feeding of the latter suc-- l cessively from the supply .to-a printing press or otherainstrumentality to be fed. A

One object of the present invention is. to provide a' sheet feeder having'improved and sim" plified mechanism for operating the supply mov- 10 in! means. Another object of the present invention is'to provide a sheet feeder having feeding or forward- (ing means constructed and arranged so that it may be utilized to actuate the operating mech- A16 -anism for the supply moving means.

- therefor so arranged and constructed that it may be actuated by the operating 'means for said mechanism and controlled by movement o'f vthel supply and removal of sheets therefrom.

-These and other objects of the present invention will appear as the following description thereof proceeds. y

In order to more clearly understand this ini vention reference may be had to the accompanyingl drawings which illustrate one embodiment of the inventive idea.

In. Said dliawln! ing a pile elevator; Fig. 2 is atopplan view thereof;l

` 5o elevator is about to be raised;

ng. s is s fragmentary eide elem-.lem

in section, of. pawlv and ratchet mechanismeme.

ployed to raise the pile elevator;

Fig. 6 is anendviewof the mechanismshown 55. in m. s, loosing `from the lleft thereof;

r1-lg. use see elevation-ef e sheet feeder im` ne. 3 is e side elevation. verily 'innemenof control -means for the pile'elevator, the parts projecting inwardly from' 'in empplan viewzerftne showninFig.6'; and

mg.s1seneuav1eweim11ertem.s,enewing control means for the pa'wl and ratchet'mech- Referring-to the arewinsswnerem-.uxe reference characters designate like parts throughout the several'vi'ews, the various instrumentalities of. the feeder are mounted on a frame comprised by .front uprightsi and rear unrishts I connected 1o together by side members 1 and l (Figs. 1 and 2).

"I'heuprightsiandl areboltedorotherwise suitably secured to the machine foundation, the front uprights i .being connected together by cross members! bolted or otherwise suitably l5- seclu'edvthereto, and the rear uprights 6 being connected together by a cross member'or-stay 'shaft Il bolted or otherwise suitably secured thereto. The cross members 9 have bolted or otherwise suitably secured thereto a. plate Ii for '20 guiding the front side of a supply or pile of sheets I2 that is supported on and lifted by mechanism ablebearingsonthe front uprights i. This shaft Il has fixed thereon a spur pinion I6 which 30'4 thereof ere n which engege muere n thas-.40" are Jour-nailed in any suitable manner t front ends of forwarder bars 24. These for-`- warder bars are slidably mounted onand betweenguide rollers Il'that'engage the tops and bottoms'of the bars andare journalled in any 45 suitable manner on thesid'e members] andl.

Thforwarder bars Il have secured thereto on" studs ,spring rods 21 that pass through suitable 4openings in guide pins 28 secured to and sidemembers '1 and The rods 21 have lsecured thereon '2l and the springs 3l for said rods are mounted thereon between. said collars and the guide pins 2l. It will thus appear that theforwarderbars of the feeder and are cam operatedl in one direction and spring operated in the opposite direction when the cam shaft 2| is driven from the source of power through the described driving connections therebetween.

Secured to and projecting inwardly from the uprights 5 are lugs or pins 3| that support the rear ends of longitudinally extending bars 32. The

front ends of these bars 32 are supported in, and secured by any suitable means to, brackets 33 which, in turn, are bolted or otherwise suitably secured to the side members 1 and 8. 'I'he longitudinally extending bars 32 have adjustably mounted thereon near the rear ends thereof, as by set screws 34. brackets 35 which are bolted or otherwise suitably secured to a square cross bar 36 carrying sheet separating devices 31. The bar 36 and separating devices 31 are thus adjustable forwardly and rearwardly of the feeder in accordance with the length of sheets being handled therein. The separating devices 31, as shown in the drawingaare preferably of the suction type and constructed and operated in any well known manner needing` no detailed explanation herein. 'I'hey act to lift the rear portion of the top sheet of pile l2 at the proper time during a cycle of operation of the feeder so that air may be blown under the sheet by suitable means (not.

shown) and so that the lifted and winded sheet may be advanced by forwarding devices 35 to feed and drop rollers 38 and respectively or other suitable means for delivering the sheets from the feeder to a printing press or other instrumentality to be fed.

The feed roller 39 is xed on and rotatedV by shaft I5 and the drop rollers 45 are mounted on and operated by mechanism (not shown) that `serves to move said drop rollers toward and away from the feed roller at proper intervals during the operation of the feeder. The sheet forwarding devices 38, as shown in the drawings, are preferably of the suction type and are constructed and operated in a well known manner needing no detailed explanation herein. Said sheet forwarding devices are mounted on cross bars 4| that extend transversely of the feeder in parallel relation and are bolted or otherwise suitably secured on the forwarder bars 24. The suction separating devices 31 and the suction sheet forwarding devices 38 may be adjusted toward and away from each other along the cross bars 36 and 4| respectively in accordance with the width of sheets being handled in the feeder. l

Bolted or otherwise suitably secured on one of the forwarder bars 24 is a bracket 42 provided with a stud 43 on which is journalled a roller 44 engaged in the lower forked end 45 of a pawl carrier 46. `This pawl carrier 46 is journalled for oscillating-movement by the forwarder bar aforesaid, on a collar or bushing" that is fixed by a counter-sunk set screw 48, on a shaft 49. This shaft 49 extends transversely of the feeder and is journalled in extensionsl 50 of brackets 5| that are bolted or otherwise su'itably secured to the uprights 5 at the tops thereof. The pawl carrier 46 has pivoted thereon at the top thereof,

A" as by a stud 52, a pawl 53 having a laterally and inwardly directed projection 54 on the nose thereof. This pawl 53, through oscillation of the carrier 45 by the forwarder bar connected therewith acts, under certain conditions, to engage the teeth of a ratchet 55 and thus raise the pile cf sheets 2. For this purpose, the ratchet 55 is preferably fixed on a hub 56 of a member 51 of a clutch 58 the other member of which is indiauaiso t cated at 53. The clutch member 51 is loose on the shaft 43 and the clutch member 53 is xed thereon. This clutch is of well known construction having elements (not shown) on one part thereof which may be engaged with and disengaged from the other clutch part thus enabling the shaft, 49 to be driven by the pawl and ratchet or to remain inactive during operation of the pawl carrier, as desired.

The clutch 58 may be rendered operative or inoperative by any suitable means such, for example, as a sleeve-like operating member 50 provided with a groove 5| in which is engaged a fork 62. The fork 62 is fixed on a rod 63 extending transversely of the feeder and slidabiy mounted in suitable bearings in the brackets 5|. The rod 63 is provided on one end thereof with a grooved collar 54 in which is located one end of an operating handle 55 pivoted in any suitable manner on one of the uprights 5. It will thus appear, that by actuating the handle 5v5 the described parts connected therewith may be operated to engage or disengage the clutch parts 51, 53 to enable shaft 48 to be driven or to prevent driving of the same, as desired.

Loosely mounted on the hub 56 of clutch part 51 is a pawl mask 66 disposed between said clutch part and the ratchet 55. 'This mask 56, under certain conditions, acts to prevent the pawl from engaging the ratchet 55, and under other conditions enables said pawl to engage said ratchet.

.For this purpose, the mask 55 is provided with a notch 51 on the periphery thereof. This notch 61 terminates at one end in a shoulder or abutment 65. 'I'he mask 55, which is of 4slightly greater diameter ,than the ratchet 55, is provided adjacent the shoulder 55 with a portion 58 beveled inwardly toward the same. When the pawl carrier 46 is oscillating and the pile of sheets I2 is stationary, the projection 54 on the nose of pawl 43 rests on the mask 55 as shown ln Fig. '1, and said mask is oscillated with said pawl carrier. For this purpose, the mask 55 is provided with a pin 18 to which is attached one end of a coil spring 1|. I'he opposite end of the spring 1| is secured to a pin 12 on the pawl carrier 45. A third pin 13 is secured on the mask 55 and normally maintained in engagement with the pin 12 by the spring 1| so as to hold the parts in the positions shown in Pigs. 5 to '1, inclusive, wherein it will be noted that the pawl 53 is held out of engagement with the teeth of the ratchet 55 by the mask 55. The pin 13 is so positioned on the mask 55 that when it is engaged with the pin 12 through contracting action of the spring 1I, the shoulder 68 is in allnement with the back of one of the teeth of the ratchet 55. The pawl 53 is thus supported to engage the iirst tooth of the ratchet to the rear of the shoulder 55 when the mask 66 and carrier 45 are moved relatively as hereinafter described. During clockwise movement of the pawl carrier 45 (Flg. 5) the mask 55 is moved therewith through engagement of the pins 12, 13, this of course being the case when the pawl 53 is held out of engagement, with the ratchet 55 by the mask. During counterclockwise movement of the pawl carrier 46, and with the pawl 53 held out of engagement with the ratchet 55 by mask 65, said mask moves in said direction with the pawl carrier through the action of spring 1| Aand is prevented from overrunning the pawl carrier by engagement of pin 12 with pin 13.

The pile of sheets I2 is raised at intervals as sheets are fed oil.' the top of the same by the ed and passes through a suitable opening in a 'l arcaico.

suction separatingy and forwarding devices 21 and Il. Raising of the pile of sheets isenected 'by the ydescribed pawl and ratchet mechanism the. operation of which is controlled as hereinafter described. The pile supporting and elevating mechanism may be of any suitable construction and as hei'ein'shcwn, is operated by and consists of the following devices.

Fixed on the shaft 42 are right and left hand worms 'I4 and 1I. which Amesh with similar wormwheels'ilandllthatarenxedonshafts".

I y These shuts n extend longitudinally of the Y feeder at opposite sides thereof and are lournalled insuitable bearingsy in the brackets il and brackets 1l, the 'latter being bolted or otherwise -v suitably secured to the rear uprights l.

mounted on the rock shaft 2i adjacent the innermost bracket 84 is a lever 86, the lowerend of which has journalled thereon a detector or feeler away fromthe top of pile of sheets y Jugend lowering of the detectorfmay, de.

wheel or roller l1 for engagement with the top of the pile of sheets I2. The upper end of levert has pivotally connected therewith a small spring pressedrod IIl the upper end of which is threadsmall lever I l that is fixed'on the rock shaft Il. An adjusting nut SI is threaded on rod lb above lever 2l, and a coil spring 9| is positioned on said md between lever and lever 29. IBy turning the nut ll the lever '8l and feeier roller `r2`| may be raisedor lowered slightly to adjustA the operation as hereinafter described.

Fixed on the rock shaft Ibis' a thlrd'lever 22 the amper end of which has iournalled thereon in superposed spaced relation al pair of rollers 02. A bar I4 having around top siuface extends between the rollers fand is provided with arms Si pivotcd at" on the side' member 1. '111e bar v I4 is provided at the-front thereof with a laterally, .upwardly and forwardly directed detent Il which extends over the mask Il in suchposition that it may, under certain conditions. be ensued with and disengaged from the shoulder of said mask.v 'Ihe bar I4 has journalled thereon a roll'- er Il which, during reciprocation of the forwarder carriage comprised by the bar 24 v and cross bars 4 I is engaged intermittently by a cam l! bolted or otherwise suitably secured on cross bars-4|. A'l'.he bar I4 has 'attached thereto one end of a spring Ill, the opposite end of which is attached v toa pin III that is secured in any suitable manner on the. side member 1. It will `thus appear that when the forwarder carriage is reciprocated thebarl4anddetent ll ther'eouwill.becamV operated in one direction and spring Operated-in the opposite direction to swing the detent towardl and away from the mask It. It will further appear'that when the bar I4 and detent ,areswung as aforesaid. the detector or feeler wheel '-orrollerwilLthrlhthcdeecrib'edconnections therefor'with saidfbar. toward and n. naisif beassistedbysswinginthathaeoueend .and the springiu. pile ofsheeu nested with the lever er and the eppesite'end connected with one of the brackets 24.

when the feeder is loaded and ready for operation the cam shaft 2| is driven from the source of'power therefor and the clutch parte I1. Il

drlveshaft 4i. Dining rotation of cam shaft- 2i, forwarder frame 24, 4i is reciprocated bythe described means for this purpose so that the detent l1 is rocked toward land away from the mask -areengagedbythedescribedmeansforthispurposesoastoconnecttheratchet llwiththe io? g il and the 'feeler or detector wheel or roller 21 is rocked 'toward and away from the vpile of sheets I2. 'As long as the top of the pile. i2 is at a height vwhere the sheet separating and forwarding devices 3l, 2 2 can act to separate and deliver sheets from the pile, the feeler or detector wheel or roller I1 will, as shown in Fig. 3;

be prevented from moving downwardly a sumclent distance to enable the detent l1 to enter the notch l1 of mask I6 and engage the shoulder il thereof.

The pile of sheets I2 ,.the platform 23 and its `elevating mechanism, and the driving connections for the latter will thus remain stationary because the pawl I2, through the action of spring 1i and pins 12, l2 in maintaining the mask` and the pawlfcarrier 4G in the relative positions thereof shown in Fig. 5 ofthe drawings, will be prevented by the mask from engaging ratchet 44 and driving shaft 49. Under these conditions the mask the pawl carrier 48 and the pawl I3 will be oscillated as a unit by the forwarder frame .42, 4I1 with only an idlingmovement of the mask, carrier and pawl resulting therefrom.

When, through removal of sheets from thetop of pile i2, the height thereof decreasesv to a certain extent the detent l1, through increased downward movement 'of the feeler or detector wheel' or roller l1, as shown in Fig. v4, is enabled to enter the notch 61 of mask 66 back of the shoulder 42. The mask is thus prevented from vcompleting a counter-clockwise turning movement (Fig. 4) with the pawl carrier 4l. 'Ihe pawl carrier, however, completes said movement during which the spring 1i is expanded, the pawl projection 5l drops'into the notch 61 back of ,shoulder Il, and thev pawl 53 drops into the ratchet 55 at the back of the rst tooth thereon rearwardly oftsaid shoulder. The pawl carrier 44 then turns in a clockwise direction (Fig. 4) during whichjllke movement ls imparted to the ratchet l! by' pawl 52 andto the mask I4 by engagement of pawl projectionv 54 with the shoulder Il. lruring.y thisclockwise turning ymovement kof the parts, the spring 1i remains expanded and the shaft 49 is partially rotated p to raise the platform 83 and pile of sheets i2 through. the described vdriving `connections between said shaft and said platform. f

Upon reverse or'co'unter-clockwise movemen of the pawl carrier 44 the pawl 53 will ride up over the teeth eil ratchet si and the spring 1| will vmofve the mask 4I counter-clockwise faster than the pawl carrier until the bevel. on said engages under the pawl vprojection 84 andl ,thepin 13 engages the pin 12. The pawl 5f is thulheld out of engagement with ratchet Il and the parte, in this position.v then complete the counter-clockwise turning movement. While the ratchet Il isbeing operatedas above described.

'theuete'nt e1 is rnlsedfbythe'cem si. and when the paw! I! moves reversely over the teeth of the ratchet Ii. detent l1 is lowered by glravity 2 has not been elevated suinciently, the detent 91 will again enter the notch 8l of mask I6 back of shoulder 55 and the described operations of the pawl and ratchet mechanism and the pile elevating mechanism will be repeated until the top of the .pile reaches the proper and predetermined height. In this event, the detent 91 will be prevented from entering the notch 61 of mask 55 through failure of the feeler or detector wheel or roller 81 to lower a sufficient distance. carrier 45, pawl 53 and mask 6G then operate idly, as before described, until the height of the pile again decreases to an extent such as to require further elevation thereof..

The aforesaid operations are repeated until it is desired to stop the operation of the pile elevating mechanism or until the supply of sheets is exhausted and it is desired to stop and reload said mechanism. Stopping of the pile elevating mechanism is accomplished by disengaging the clutch members 51, 59 through the medium of the handle 85 and parts connected therewith. When the clutch 55 is thus rendered inoperative, the pawl can'ler l5, pawl 53 and mask 65 may continue to move if the forwarder is operating as, in thiscase, the ratchet 55 is disconnected from shaft 49. 'I'he chains 8| and platform 85 may `then be moved downwardly to reload the feeders by imparting reverse rotation to the shaft 49, shafts 15, the gears 'II- 11 by a hand crank or other suitable means for this purpose (not shown). It will thus appear that it is not necessary to stop the operation of the forwarder frame 2l, il during reloading of the feeder although this may be done, if desired by shutting oif the source of power connected therewith. After the feeder has been reloaded, the clutch is rendered effective by the described means for this purpose, the cam shaft 2| is driven from the source of power, and the operation proceeds as before.

The present invention may be embodied in various types of feeders and while'a pile type embodiment of said invention is herein illustrated and described with more or less particularity it is to be expressly understood that the invention is not limited to said embodiment or otherwise than by the terms of the appended claims.

What I claim is:

l. In a sheet feeder, means for moving a supl ply of sheets, pawl and ratchet mechanism for operating the same, reciprocating means for feeding sheets from the supply and for operating the pawl and ratchet mechanism, a pivoted device for controlling the operation of the pawl and ratchet mechanism by the reciprocating means, a cam on the reciprocating means for oscillating the pivoted device, and supply controlled means connected with said device for rendering the same effective or ineffective.

2. In a sheet feeder, means for moving a supply of sheets, a shaft for operating said means, mechanism for driving the shaft comprising a clutch thereon, a ratchet fixed on the clutch, a. carrier loosely mounted on the shaft, and a pawl pivoted on the carrier, a mask loosely mounted on the clutch for preventing engagement of the pawl with the ratchet when said mask is continuously oscillated with the carrier, means for oscillating the carrier, pawl and mask, means for stopping the mask and enabling the pawl to engage the ratchet and drive said shaft through continued oscillation of the carrier, and connections between the carrier and the mask providing for stopping of the latter and continued oscillation of said carrier.

3. In a sheet feeder, means for moving a supply of sheets, a shaft for operating said means, mechanism for driving the shaft comprising a clutch thereon,A a ratchet fixed on the clutch, a carrier loosely mounted on the shaft at one side of the ratchet, and a pawl pivoted on said carrier, a

mask loosely mounted on the clutch at the opposite side of the ratchet for preventing engagement of the pawl therewith when said mask is continuously oscillated with the carrier, and connections between the carrier and the mask providing for stopping of the latter and continued oscillation of said carrier.

4. In a sheet feeder, means for moving a supply of sheets, a shaft for operating said means, mechanism for driving the shaft comprising a clutch thereon, a ratchet xed on the clutch, a carrier loosely mounted on the shaft, and a pawl pivoted on said carrier, a mask having a notch therein and loosely mounted on the clutch, said mask supporting the pawl out of the notch and away from the ratchet when the mask is continuously oscillated with the carrier, means for removing sheets from the supply and for oscillating the carrier, the pawl, and the mask, supply controlled means for engaging the notch of the mask to stop movement of the latter in one direction and enable the pawl to engage the ratchet and drive said shaft through continued oscillation of the carrier, and connections between the carrier and the mask providing for stopping of the latter and continued oscillation of said carrier.

5. In a sheet feeder, an elevator for a supply of sheets,'means including a shaft for raising the elevator and the supply of sheets, mechanism for driving the shaft comprising a ratchet, means for connecting the ratchet with the shaft, a carrier loosely mounted on said shaft at one side of the ratchet, and a pawl pivoted on said carrier and havingv a projection, a notched mask extending under said projection and of slightly greater diameter than the ratchet, said mask being loosely mounted on the shaft at the opposite side of the ratchet and engaged by the projection of the pawl to hold the latter out of engagement with the ratchet when said mask is continuously oscillated with the carrier, suction means for forwarding sheets from the pile and for oscillating the carrier, pawl and mask, a pivoted device adapted for engagement with and disengagement from the notch of the mask to start and stop the operation of the latter and the ratchet and thereby start and stop movement of the shaft and the elevator, means for oscillating the pivoted device, and a pile controlled detector connected with said pivoted device for rendering the same effective or ineffective.

6. In a sheet feeder, an elevator for a pile of sheets, suction means for forwarding sheets successively from the top of the pile, a bar located horizontally above the pile and carrying the suction sheet forwarding means, guide means for the bar supporting it for right line reciprocating movement, means for imparting horizontal right line reciprocating movement to the bar and the suction sheet forwarding means, a shaft connected with the elevator for operating the same, means for driving the shaft including pawl and ratchet mechanism mounted thereon, and means for operating the pawl and ratchet mechanism comprising a carrier for the pawl thereof pivotally mounted on said shaft and pivotally connected with and actuated by said bar.

"iti

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y '1.1m e sheet feeder. en elevator for s pue of sheets, suction means for-forwarding sheets successively from the vtop of the pile, a bar located horizontally above the pile and carryingl the suction sheet forwarding means, guide means for the bar supporting it for right line reciprocating movement', means for imparting horizontal right line reciprocating movement to the bar and said suction sheet forwarding means, pawl and ratchet mechanism for operatingsaid elevator, means for operating the pawl and ratchet mechanism connected with and actuated by said bar, and pile controlled means controlling the operation of the pawl and ratchet mechanism and pivoted Il independently of the bar on an axis extending n transversely oi' the axis of rotation ofsaid mech- .8. In a sheet feeder, an elevator for a pile of sheets, suction means for forwarding sheets successively from the top of the pile, a bar located horizontallyabove the pile and carrying the suction sheet forwarding means, guide means for the bar supporting it for right line reciprocating movement, a driven cam and spring means both operatively engaged with the bar for imparting horizontal right line reciprocating movement to the same and said suction sheet forwarding means, a shaft connected with the elevator for operating the same, means for driving the shaft including a pawl and ratchet mechanism mounted thereon, means for operating the pawl and ratchet mechanism comprising a carrier for the pawl thereof mounted on said shaft and connected with and actuated by said bar, and pile .controlled means controlling the operation .of the pawl and ratchet mechanism and pivoted independently' of the bar on an axis extending transversely of the axis of rotation of said mechanism.

means for operating it including adriving element, a ratchet -iixed on the driving element, an oscillating pawl carrier mounted at one side of the ratchet independently thereof, a cylindrical ratchetindependently thereof and having a cutout portion and a shoulder in its periphery, connections between the cylindrical member and4 ratchet, said cylindrical member. Iand said drivingv element during movement of said pawl carrierin the opposite direction. 10.111 a sheet feederhaving meamfor operating it-including a driving Aelement, a ratchet fixed on-.the driving element, an v pawl carrier'pivotally mounted adja- .Icent'the ratchet independently Athereoiha cylinmember rotatably mounted adjacent the ratchet independently thereof and having a cutout portion and a shoulder in its periphery, a pawl the proiee'une over the ratchet and the cylindrical member, a yieldableeonnection between the carrier and the cylindrical member Il normally the relative to 9. In a sheet feeder having a pile elevator and member mounted'at the opposite 4side of the sage the ratchet and shoulder and drive said eene examina;

so that the pawl rests on said member adjacent said shoulder and removed from said .cut-out portion and the ratchet, said connection providing for continuous oscillation of the pawl carrier with or without corresponding oscillation of the cylindrical member, and pile controlled A means for engaging the shoulder of the cylindrical member to stop it and enable the pawl to drop into engagement withthe ratchet through -said cut-out portion and drive said ratchet and said driving element during continued oscillation -of said pawl carrier. 11. In a sheet feeder having a pile. elevator l and means for operating it including a driving element, a ratchet fixed on the driving element, an oscillating pawl carrier mounted at one side f of the ratchet, independently thereof, a cylin drical member of slightly greater diameter than the ratchet mounted at its opposite side independently -thereof and having a cut-outportion.l and a shoulder in its periphery, a yieldable connection between the cylindrical member and the pawl carrier enabling the latter to h e continuously oscillated with or without corresponding oscillation of said member, a pawl on the carrier extending therefrom across .the ratchet over the cylindrical member and held thereon adjacent its shoulder out of the cut-outportion and ratchet by action of' said yieldable connection,` and pile controlled. means for engaging the shoulvder of the cylindrical member t'o stop it .during movement of the same and th carrier in one direction and enable the pawl to engage the ratchet and said shoulder through said cut-out portion and drive `the ratchet, the cylindrical member, and said driving element during movement of the pawl carrier in the opposite direction, said pawl being raised out of engagement with the ratchet and overgsaid shoulder through movement of the pawl c'arrler and cylindrical member in the iirst named direction and overrunning action of said member relative to said carrier produced by the yieldable .connection therebetween. s i

' 12. In a sheet feeder having a pile elevator and means for operating it including a driving element, a ratchet fixed on the driving element, an oscillating pawl carrier pivoted at one side of the ratchet independently thereof, a cylindrical member rotatably mounted on the opposite side of the ratchet independentlythereof and ,having a cut-out portion and a shoulder in its periphery, a pawl on' the carrier having a nose extending therefrom across the ratchet and over the cylindrical member, connections between the pawlcarrier and the cylindrical member normally holding. the latter relative tothe pawl carrier so that the nose of the pawl'rests on said shoulder above the cut-out portion, and the ratchet, said connectionsproviding for oscillation of the pawl carrier' with or without corresponding oscillation .of the cylindrical member,

and 'pilecontrolledmeans for` waitin! the shoulder on the cylindrical to stop it on movement `of the 'same in one direction with the pawl carrier and. enable the nose of the pawl to. engage the ratchet and said shoulder through -said cut-out portion and drive said ratchet, said member, and said driving element during movement of the pawl carrier in the opposite direction. 13.I n asheet feeder havinga pile elevator and means for operating it including a driving element,.a ratchet fixed on the driving element.' an oscillating pawl carrierjandja' rotatable cylindriearner en .member both with r?- 1s'.

spect to the ratchet and movable independently thereof, said cylindrical member having a cut out portion and a shoulder in its periphery, a pawl on the carrier extending therefrom over the ratchet and the cylindrical member, a pin on the pawl carrier projecting laterally therefrom across the ratchet and the cylindrical member, a

spring connecting the p in with the cylindrical member enabling the pawl carrier to be oscillated with or without corresponding oscillation of the cylindrical member and normally holding the cylindrical member relative to the pawl carrier so that the pawl rests on said shoulder and is removed from said cut-out portion and the ratchet, and pile controlled means for engaging the shoulder of the cylindrical member to stop it on movement of the same and the pawl carrier in one direction and enable the pawl to engage said shoulder and the ratchet through said A the ratchet and over the shoulder on the cylindrical member, a pin on the pawl carrier extending laterally therefrom across the ratchet and the cylindrical member, a spring connecting said pin and the cylindrical member providing for continuous oscillation of the pawl carrier with or without corresponding'oscillation of the cylindrical member, a pin on the cylindrical member normally engaged with said first named pin by said spring and acting therewith to normally hold the cylindrical member relative to the pawl carrier so that said member supports the pawl on said shoulder and removed from said cut-out portion and the ratchet, and pile controlled means for engaging the shoulder on the cylindrical member to stop it on movement of the same in one direction with the pawl carrier and enable the pawl to engage said shoulder and the ratchet through said cut-out portion and drive said ratchet, said cylindrical member and said 'driving element on movement of said pawl car- -rier in the opposite direction.

e jacent the opposite side of the ratchet pivoted independently thereof and having a pawl extending thereacross over the shoulder on the cylindrical member to drop into the ratchet through said cut-outportion when said member is stopped on idle movement thereof with the pawl carrier in one direction, means adapted,

when the pawl has engaged the ratchet, to move the cylindrical member relative to the pawl carrier on idle movement thereof so that the shoulder on said member removes the pawl from the ratchet and prevents it from riding thereon, said means comprising a yieldable connection between the cylindrical member and the pawl carrier enabling continuous oscillation of the latter with or without corresponding oscillation of the cylindrical member and normally holding the cylindrical membervrelative to the pawl carrier so that 'said shoulder'supports the pawl above said cut-out portion and removed from the ratchet, and pile controlled means for engaging the shoulder of the cylindrical member on idle movement of the same and the pawl carrier in one direction, whereby said pawl may drop through the cut-out portion of the cylindrical member, engage the shoulder thereon and the ratchet, and turn said ratchet, said cylindrical member and said driving element on following movement of the pawl carrier in the opposite direction.

16. In a sheet feeder having a pile elevator and means for operating it including a driving element, a ratchet fixed on the driving element, an oscillating pawl carrier mounted at one side of the ratchet independently thereof, a member mounted at the opposite side of the ratchet independently thereof and having a shoulder or abutment thereon, connections Vbetween the member and the pawl carrier enabling the latter to be continuously oscillated with or without corresponding oscillation of said member, a pawl on the pawl carrier extending therefrom across the ratchet and the member and normally maintained out of engagement with said ratchet by sai'd connections, and pile controlled means or engaging the shoulder or abutment of the member to stop it during movement of the pawl carrier in one direction, allow the pawl to engage the ratchet when the member is stopped and during movement of the pawl carrier in said direction, and enable the pawl to drive said ratchet and said driving element during movement of said pawl carrier in the opposite direction.

17. In a sheet feeder having a pile elevator and means for operating it including a driving element, a ratchet fixed on the driving element, an oscillating pawl carrier pivotally mounted adjacent the ratchet independently thereof, a member rotatably mounted adjacent the ratchet independently thereof and having a shoulder or abutment thereon, a pawl on the carrier projecting over the ratchet and the member, connections between the carrier and the member` normally holding the latter relative to the carrier so that the pawl rests on said shoulder or abutment and is removed from the ratchet, said connections providing for continuous oscillation of the pawl carrier with or without corresponding oscillation of the member, and pile controlled means for engaging the shoulder or abutment of the member to stop it and enable the pawl to drop over the shoulder or abutment into engagement with the ratchet and drive said ratchet, said member and said driving element during continued oscillation of said pawl carrier.

18. In a sheet feeder having a pile elevator and means for operating it including a driving element, a ratchet xed on the driving element, an oscillating pawl carrier mounted at one side ofthe ratchet independently thereof, a member mounted at the opposite side of the ratchet independently thereof and having a shoulder or abutment thereon, a yieldable connection between the member and the pawl carrier enabling the latter to be continuously oscillated with or without corresponding oscillation of said member, a pawl on the carrier extendingtherefrom across the ratchet over the member and held adjacent its shoulder or abutment out -of enin one direction with the pawl carrier and engagement with the ratchet by action of said yieldable connection, and pile controlled means for engaging the shoulder or abutment of the member to stop it during movement of the same and the carrier in one direction and enable the pawl to engage the ratchet and said shoulder or abutment and drive the ratchet, the member, and said driving element during movement of Athe pawl carrier in the opposite direction, said pawl being raised out of engagement with the ratchet and over said shoulder or abutment through movement of the pawl carrier and member in the first named direction and over-running action of said member relative to said carrier produced by the yieldable connection therebetween.

19. In a sheet feeder having a pile elevator and means for operating it including a driving element, a ratchet xed on the driving element, an oscillating pawl carrier pivoted at one side of the ratchet independently thereof, a member rotatably mounted on the opposite side of the ratchet independently thereof, said member havingv a cut-out portion and a shoulder thereon, a pawl on the carrier having a nose extending therefrom across the ratchet and the member, connections between the pawl carrier and the .member normally holding the latter lrelative to the pawl carrier so that the nose of the pawl rests on said shoulder above the cut-out portion and the ratchet, said connections providing for oscillation of the pawl carrier with or without corresponding oscillation of the member, and pile controlled means forengaging the shoulder of the member to stop it on movement of the same able the nose of the pawl to engagelthe ratchet through said cut-out portion and drive said ratchet and said driving element during movement of the pawl carrier in the opposite direction.

20. In a sheet feeder, a pile elevator and means for operating it including a driving element, 'a l ratchet fixed on the dirving element, an oscillating pawl carrier mounted at one side of the ratchet independently thereof, a member rotatably mounted on the opposite side 4of the ratchet independently thereofl and having a shoulder or aubtment thereon, a pawl on the carrierextending therefrom across the ratchet and the member, a pin on the pawl carrier extending laterally therefrom across the ratchet and the member, a spring connecting said pin and the member providing for continuous oscillation of the pawl carrier with or without corresponding oscillation of the member, a pin o"n the member normally engaged with said first named pin by. said spring and acting therewith to normally hold the member relative to the pawl carrier so that said shoulder or abutment supports the pawl out of engagement With-the ratchet, and pile controlled means for engaging the shoulder or abutmentl of the member to stop it on movement of the same in onedirection with the pawl carrier, allow the pawl to engage the ratchet when the member is stopped and during movement of the pawl carrier in said direction, and enable the pawl-to drive said ratchet and said driving element on movement of said pawl carrier in the opposite direction.

`LEONARD BAKER.

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