US2186472A - Feeding mechanism for shaker or jigging conveyers - Google Patents

Description

Jan. 9,l 1940. l E. R. BERGMANN 2,186,472

FEEDING MECHANISM FOR SHAKER OR JIGGING CONVEYERS 2 Sheets-Sheet l loriginal Filed Jan. 27, 1958 Her/14S M Jan. 9, 1940. E. R. BERGMANN 2,186,472

FEEDING MECHANISM Foa SHAKER muc-Teme coNvEYER's original Filed Jan. 2v. 1938 2 sheets-sheet 2 Patented J an.

MECHANISM Foa SHAKER on i JIGGING CONVEYERS I 4FEEDIG.

PATENTlo'FFiCE l'Ernst R. Bergmann, Chicago, Ill.,jassignor to f Goodman Manufacturing Company, Chicago; l IIL, acorporation of Illinois Application January' 1938, Serial-No.` 187,145 Renewed April 29, 1939 ..1 t

This invention relates to improvements in'feed---l ing mechanisms for shaker or jigging conveyers of the type utilized for picking up and transportingloose material such as "coal, rock, or the like. n. Y

More specifically, .the present invention is an improvement inthe general form of feeding devices dis'closedfin my prio-r application Serial No.

15'@ adapted to automatically extend lorretract 4an of the friction gripping devices and for compen.-

reciprocating trough section HI vis supported at its forward end for'free reciprocable movement Among the objects of my invention isto provide a feeding device of` a simpler .construction extensible trough section with respect to a recip--` rocating. trough sectiony ,by Ireciprocable movement of the conveyor due to resistance .of the extensible trough section against the ground, which includes a more eilcient arrangement of adjustl ing mechanism for changing the gripping action sating for wear of said devices. l v.

Other objects of my invention will appear from time to time astheaccompanying specic'ation mechanism shown in Figure l showing certain parts of the conveyer trough brokeny away,fand.

showing. certain parts of vthe feeding mechanism inhorizontal section;

Figure 3 vis a fragmentary view in side elevation of the feeding ydevice shown in Figure 1 with certain parts broken away'and shown in longitudinal section in order to more clearly illustrate certain details ofv my invention; y

Figure 4 is an enlarged transverse sectional view taken through one-of the clamping devices;

Figure 5 is a plan view of oneof the clamping devices drawn'to substantially the same scale as Figure 4;

l.liigure 6 is substantially along line t--E of Figure 3,;

Figure 7` .isa diagrammaticviewin side eleva-y tionk of the forward end oi 1l,he.panl line showing* the feeding l device.positionedv for. retracting the ring trough section;, and

\ respect to each other.

I t likewisemounted betweenthesideshof said C- a. transverse sectional view taken extensibley .trough section Lwithinvthe. reciprocati Y Figures 8 and 9I are diagrammatic views in side elevation illustratingthe positions'` of the feeding device forextending .or retractingthe extensible trough section. i

In the embodiment of my inventionillustrat'ed in the drawings', the main elements, thereof'include a reciprocating trough sectionv kIll'connect'ed tothe -forward .end of a shakerv conveyer trough line (not shown). An extensible trough section or vpickup member i lg is adapted to be telescopicallyextended or retracted with respect to said reciprocating trough section andisfprovdedwth a forwardly projecting ared gathering. shovel l2 adapted to reston and slidably move along" the ground#rvlrk v .f

The pickup .member His similar to that described in.,my `afcunrementioned prior application, and is supported above the grou-ndat its. rearward end on a shoe I3 so that the entirey weightv of said troughsection rests. on the ground. The

along said pickup member by means of two pairs of rollers I6, i6 yadapted vto ride 'along' bearing plates Il, H' extending laterally from the upperv iianges of saidv pickup member and engage the undersurface thereof `upon theY tender'icy` of said trough sections to be vertically.r displaced with 30y Thev ybearingl plates'l'll. gllV are adapted to be selectively engaged by gripping devices I8, |.8 for effecting feeding movement of said pickup member. Each of; said gripping devices includes a set of friction grip blocks 25 and 2.6 mounted in acarrier member 21. Said vcarrier' members are each of aV substantially. C-shaped formation having. the open portion thereof extendingv inwardly kalong thev respective` bearing plate l1. The con.- struction andvoperationof each of said gripping devices is similar so. a description of one will sufce for both. f The lower friction grip block.- 2.5 isfmounted in the f3-shaped, carrier memberllfbeneath the open portion thereofvon a transversely disposed shaft 28 extending throughfsaid carrier member` and herein shown as being a bolt having ay nut on its end;A The upper frictiongrip block 25 is tical slots`3il,. 35i extending above lthe open portion oftfsaid carrier member to permit adjust- .t ment of. said-1 upper friction grip block.

4les

- cated crank 48 on a pivotal pin 4|.

The means for adjusting the upper grip block 25 to compensate for wear thereof includes a pair of pins 3l, 3l mounted at their upperends in a cross member 32. Said pins extend through suitable apertures formed in the upper side of the carrier member 2l :and engage the bolt 29 on opposite `sides of saidl friction grip block. The lower portions of the inner sides of said pins are cut away to accommodate the forked ends of a link 33 pivotally mounted on said bolt on opposite sides of said grip block (see Figure 4). The purpose of said link will be more clearly explained as this specification proceeds. A machine screw 34 is mounted in the cross member 32 at its upper end and is threaded within said carrier member so that rotation thereof will adjustably move v said cross member and pins with respect to said adapted to engage a` squared head 38 disposed above said hexagonal head.

The link 33 'extends rearwardly and downwardly from the bolt 29 and is pivotally mounted at its opposite end to the upper end of a bifur- Said crank is in turn flxedly mounted on a transverse shaft 43 which is mounted in a forwardly extending forked bracket 44. Said bracket is pivotally connected to the lower forward portion of the bracket memberl adjacent one side thereof by means of a pivotal pin 45.

The lower end of the carrier member 2l is connected to the forward end of the forked bracket 44 by means ofa yieldable linkage arrangement which includes an eye bolt 46 threaded for a portion of its length and slidably mounted in an apertured boss 4l, projecting forwardly from said bracket, for yieldable movement with respect thereto in a longitudinal direction. The eye of said bolt'is pivotally connected to the lower end of the carriermember 21 on a pivotal pin 49 and the head of said eye bolt abuts the insideof said bracket. A compression spring 5i! encircles said bolt and apertured boss and is interposed between the forward end of said bracket and aanged sleeve 5I. Said sleeve abuts a nut 53 threaded on said shaft to provide for adjustment of said spring.

Thus` when said pickup member is being extended with respect to said reciprocating trough section as shown by broken lines in Figure 8 and the forward end of the shovel engages an obstruction, the eye bolt 46 will yieldably move inwardly with respect to said bracket which will cause the carrier member to tend to move to a vertical position vand move the associated grip blocks to a disengaged position with respect to the bearing plate H.

The friction grip blocks 25 and 25 and carrier member 2l are maintained in a position for engaging the bearing plate Il by means of a spring link 54 which engages the free end of a crank 55. Said crank is secured to the outer end of the transverse shaft 43 tol move therewith. Said spring link includes av shaft 56 threaded for a portion of its length and secured at its lower end pivotal pin 58 (see Figures 1 and 2).

to a member 51. Said member is pivotally connected to the end of the crank 55 by means of a The opposite end of said shaft is slidably mounted in a member 59 which is pvotally mounted in a projecting end 65 of the bracket 44.- .A spring 6l encircles said shaft and is interposed between a nut 62 threaded on said shaft (for adjusting the compressive force of said spring) and the member 59. Said crank thus reacts against said spring link and saidlink tends to hold the carrier member in a position so that the grip blocks 25 and 26 will engage the bearing plate Il upon the proper stroke ofthe conveyer.

Positioning of the carrier member Zl'for feeding the extensible trough section in either a forward orreturn direction with respect to the reciprocating trough section is eected by means of a hand crank 63 mounted on the end of a transverse .shaft 64 which extends transversely beneath' the extensible trough section Il and is mounted in the brackets 44, 44 adjacent its .ends in al manner which will hereinafter more clearly appear. A crank 65 is mounted on and secured tothe shaft `64 between the furcations of `the bracket 44. Said crank in turn is connected to the crank 45 by means of a' link 66, which is pivotally connected to said first mentioned crank by means of a pin 61 and which is pivotally connected to said second mentioned crank vby means of the pin 4|- When the hand cranks 63 are in the position shown by broken lines in Figure 8 and the carrier member 2l is inclined in a rearward direction, the blocks 25 and 26 will be engaged with the bearing plates ll', ll upon the forward stroke of the conveyer. This gripping action is attained by movement of the carrier member 21 about the axis of thebolt 29, effected through forward movement of the bracket 44 and eye bolt 46 through the spring 5U in a direction to clamp said grip blocks on said bearing plates. Upon the return stroke of the conveyer frictional resistance of the trough section Il against the ground will hold said trough section from movement with respect to the ground to an extent sufficient to cause the carrier members 2l, 2l to pivot in a counterclockwise direction about the axes of the bolts 29, 29, aided by return movement of the eye bolts 46, 46, anddisengage said grip blocks from the bearing plates Il, Il. At the same time the spring links 54, 54 will be exerting pressure against the cranks 55, 55 to move said grip blocks to an engaged position with respect to said bearing plates as soon as a return stroke of the conveyer has been completed When either one of the hand cranks 63 is moved to the position shown in Figure 7, the parts are positioned for retracting the extensible trough section within the conveyer trough section. When in this position the carrier members 2l, 2l will be pivoted about the -axesof the bolts 29, 23 by the brackets 44, 44, compression springs 5D, 50, and eye bolts 46, 46, which will engage the grip blocksl 25 and 26 with said extensible trough section upon the return stroke of the conveyer, and tend to move said grip blocks to a released position with respect'to said extensible trough section upon the forward stroke of the conveyer.

The grip blocks 25 and 26 are locked in an engaged position with respect to the bearing plates Il, Il or locking the extensible trough with the reciprocating trough section when the hand crank 63 .is pivoted in a clockwise direction against the 'spring sur anni the crank sa ips-1m a position past.

l ,1 andere' said extensible trougnfsection with respect to dead center, as is shown-inFigure 9. v"The nevel means for adjusting the gripping 'force of the grip blocks 2,5Y andiii, and for compensating for Wear of said blocks and the pins and links in the feeding mechanism is as follows:

The shaft iiiiis mountedadjacent itsends in eccentri'csl'eeves 68 Se. vEach sieeve is mounted in the outer side of the forked bracket-441011 pivotal movement with respect 'thereto so that turning movement thereof' will change the position of the shaft 6d and cranks l65 and liti with respect to said bracket for increasing' or decreasing t'lrievinclination` of the carrier member 251 with` respect to the` bearing plates i'i, I'l, when positioned for either extending or reti-acting the eX- A plurality of vnuts. having bolts thereon andindicated by reference character i2 are adapted to register for engagement'with said vapertures andl said sleeveand hold said sleeve in vfixed relation with respect to said bracket.

' yWhen it is desired to change the force with which the grip blocks 25 and' 26 yengage the 'bearing platesL ii, il, to give 'said grip blocks a greater gripping pressure to 'compensate for .an

vascending grade, or a lesser ygripping pressure whenthe feeding device is arranged down grade or along the level, or to'take care of wear 'of said grip blocks andthe links and pins of the feeding device, the bolts l2 are removedfrom the flange 69 and the eccentric sleeve 68 is turned in the desired direction to inciine the Acarrier.member 2'! at a greater angle with-respectl to the' vertical to obtain a greater grippingforce,4 or at a lesser angle to` decrease the grippingaction of said grip.

` blocks. Figure lk shows this sleeve inoneextiem'e position of adjustment and Figure 3l shows it in another extreme` position ci adjustment. An indicating lug ibi projects outwardly from the a-nge of each `oi said eccentric sleeves to form a means for indicating the position of I adjustment of said sleeve so` that each sleeve on each lside of the conveyor maybe" inthe lsaine position of adjustment to enablev a uniform' gripping pressure to be attained by'ea-ch set of grip blocks.

It will be seen from the foregoing that a new and improved form of automatic lfeeding mechanisni for a vshaker conveyerhas been provided which is of la simplifiedv construction and which includes a novel arrangement of links and levers for effecting engagement or disengagement of iorm in which 'my invention may be embodied',

' itedin the appended claims.

the gripping devices of the extensible trough section and whichaiso. includes a novel and efficient form of adjusting means to enable the gripping force ofvsaid gripping devices to be uniformly adjusted in a. simplified manner.i a

While I haveherein shown and de cribed one it willbe understood that the construction thereof 'and the :.,ngernent ofthe various parts may be altered without departing iromthe spirit and scopethereof. Furthermora do not.` wish to bev construed as limiting myself to thespecific emi bodirnent illustrated,'excepting as'it may be Iini- I claiml as my invention; l i. In a 'feeding device for shaker cc-nveyers',

a reciprocating trough section, an extensible trough section, means for extending or retractsaidreciprocatingtrough section including a carrie'rmemrberia pairY of friction -grip blocks mount- 'edi-therei'n,` a bracket pivota-lly connected to the i forward end" of said kreciprocating trough section,`

a link mounted' in saidbra'cket for yieldable movement with respect'theretoin alongitudinal directionA andV a" pivotal connection between said' link andiy one endv of saidv carrier member, a

, `crank pivotally mounted in said' bracket and a connection between saidcrank and the other end* of said carrier member, means for positioning saidcarrier member toextend or retract said extensible' trough sectienincluding ano-ther crankr pi'votall'y' mounted insaid'bracketfand a connection between saidl crank 'andi said 'first mentioned' `crank, and other lmeans for adjusting said carrier 'memberto change the 'gripping force of said grip,

blocks yincludingv an eccentric member frnounted f i in said bracket and `forming a` support for said mi' secondi mentioned' crank'.

l -21 In'afeedingA device for shaker ccnveyers', a reciprocating trough section, arr-extensible trough section,` meansior extending or retracting said extensible'troughf-sectionfwith respect to said reciprocatingtrough section including a carrierl k member, a pair of friction;l grip blocks mounted therein, va brackebiivotaiiy ,connected tc the f or- *W'ard end yof 'said reciprocating trough section', a

link mounted in said bracket for yieldable movement withrespect thereto in a longitudinal direction and a pivotalv connection between said link and one end oi saidfcarrier member, a crank in nivotally` mounted iny said"bracketl and a connec-A tion between said crank'andtheother end of said carrier member, Ameans for positioning said carrier member to extend or retract said extensible trough section including another ycrank pivotally mounted in said bracket and a connection betweensaid crank andsaid ilrstmentioned crank,

and other means for adiusting said carrier mein-fr ber toV change the gripping force lof said grip" blocks including an eccentric member mounted insaid bracket and' forming a supportffor said second mentioned crank, rand means permitting saidmember to be rotatably ,moved to vary the angulary position of said crank with respect to said bracket, said means'also forming a means.,

for lholding said member from rotation.

3,1111 a feeding device `for shaker conveyer var reciprocating trough section, an extensible.

trough section, means for extending or retracting said "extensible trough. 'section with' respect toy saidreciprocating trough section including a carl riermernbcr, a pair of friction grip blocks mounted therein, abracket pivotally connectedl to the forward end of saidreciprocating trough section, a link mounted in said bracket for yieidable movement with respect theretoA in va longitudinal direction andA a. pivotal connection between said link-and the lower end of said vcarrier member, a

crank pivotally mounted in bracket and a connection between saidl crankland the upper end ofsaid carrier member, means for adjusting the K position of said'carrier member vforfextendil'ig ory retracting the extensible trough section including another crank pivotally mounted in said k bracket and a connection between said crank and said first mentioned crank. and other means for adjusting said carrienrnember and the gripping force off-said grip blocks including eccentricA sleeveforming a support for said iast mentioned crank. .y j

erin la feeding device for shaker conveyors,

a reciprocating trough section, an extensible trough section, means for extending yor retracting said extensible trough vsection with respect to said reciprocating trough section including a carposition of said carrierimember for extendingor retracting the extensible trough section including another crank pivotally mounted in said bracket and a connection between said crank and said rst mentioned crank, and other means for adjusting said carriermember and the gripping force of said grip blocks including aneccentric sleeve forming `a support for said last mentioned crank and means permitting said sleeve to be rotatably moved to vary the angular Vpostion'of said crank with respect to said bracket, said meansalso forming a means for holding said support from rotation.

5. In a feeding device for shaker conveyers, a reciprocatiog trough section, an extensible trough section, means for extending or retracting said extensible trough section with respect to said reciprocating trough section including a carrier member on each side of said extensiblertrough section having friction grip blocks mounted therein, a bracket pivotally connected to the forward end of each side of said reciprocating trough section and projecting forwardly therefrom, la link mounted in each of said` brackets for yieldable movement with respect thereto in al longitudinal direction, and pivotal connections between said links and the lower ends of said carrier -mernbers a cranklpivotally mounted in each of brackets and connections between each of said cranks and the upper ends of said carrier members, means for positioning said carrier members to extend or retract the extensible trough section including a shaft mounted adjacent its ends in said brackets and extending beheath said extensible trough section, a pair of cranks mounted on said shaft, each of said cranks being adjacent one of said brackets, and links connecting said rst mentioned cranks with said last mentioned cranks, and other means for adjusting the gripping force of said grip blocks invmovement with respect thereto in a longitudinal direction and pivotal connections between said links and one of the ends of said carrier members, a crank pivotally mounted in each of said brackets and connections between said cranks and the opposite ends of said carrier members, means for adjustably moving said carrier members toextend or retract the extensible trough section including a shaft'mounted adjacent its ends in said brackets and extending beneath said extensib-le trough. section, a pair of cranks mounted on said shaft, each of said cranks being adjacent one of said brackets, connections between said first mentioned cranks and said last mentioned cranks, and other means for adjusting the gripping force of said grip blocks including an eccentric sleeve mounted in each of said brackets and forming bearings for said shaft, and means permitting said sleeves to be rotatably moved to vary the angular position of said cranks with respect to said brackets, said means also forming a means for holding said sleeves from rotation. v

7. In a feeding device for shaker conveyers, an extensible trough section supported so that its entire weight rests on the ground independently of the rest of the conveyer, a reciprocating trough section mounted for free movement along said extensible trough section, means actuated by reciprocable movement of the conveyer due to resistance of said extensible trough section on the ground for automatically extending or retracting said extensible jtrough sectionwith respect to said reciprocating trough section including iriction gripping means and a carrier member forming a support therefor, a forwardly extending bracket pivotaily connected to the forward end of said reciprocating trough section and a link mounted in said` bracket for yieldable movement with respect thereto in a longitudinal direction, a pivotal connection between said link and one end of said carrier member, a link connected to the other end of said carrier member, a crank pivotally mounted in` said bracket and having pivotal connection with said second mentioned link, another crank mounted coaxial with said rst mentioned crank for movement therewith and a spring link engaging the end of said crank and forming a Imeans against which said cranks react, a third crank spaced from said rst two cranks and having connection 4with said first mentioned crank for positioning said carrier member to extend or retract the conveyer, and means for adjusting the position of said third crank with respect to said bracket and adjusting the gripping action of said gripping means including an eccentric sleeve within which said last mentioned crank is mounted.

8. A feeding device in accordance with claim 'I wherein means registering for engagement with the sleeve and bracket are provided for holding said sleeve in fixed relation with respect to said bracket or permitting said sleeve to be adjustably moved with respect to said bracket.

9. In a feeding device for shaker conveyers, an Y extensible trough section supported so that its entire weight rests on the ground independently of the rest of the conveyer, a reciprocating trough section mounted at its forward end for free movement along said extensible trough section, means actuated by reciprocable movement of the conveyer due to resistance of said extensible trough section on the ground for automatically extending or retracting said extensible trough section with respect to said reciprocating trough section including friction gripping devices and a carrier member mounted on each side of said extensible trough section in advance of said reciprocating trough section and forming supporting means for said frictiongripping devices, means for connecting said carrier members with said reciprocating trough section including a forwardly extending bracket pivotally connected to each side ,g1-sense fithe 'forward end. of said reci-proeatin'g rtrough section, connecting members mounted-Sv in ,,said

brackets for yieldable movement withrespect thereto in a longitudinal direction, pivotal .connections between said membersand the lower vends of said carrier members, ai crankjpivotally mounted in eachv of said brackets' and links'connecting the upper ends of said carrier members with said cranks, another crank mounted coaxial with each of said first-mentioned .cranks and spring links engagingftheends of Vsaid cranks,

means for positiningsaid carrier 'members tov/extend or retract the' conveyor including-a transi verse shaft mounted f adjacent'its gendsin said brackets,a third crank on said. 'shaft adjacent each endfthereof, a connection between each of said first and thirdv` mentioned cranks, and means for adjusting the position of'said third mentionedcranks with respect lto said brackets andadjust- Ving the gripping--action-gof said gripping means including an eccentric sleeve mounted in each of vsaid brackets and forming bearings for said shaft. l

. l0. A feeding device in accordance with. claim 9 wherein means registering for engagement with the sleeves and brackets are provided for holding said sleeves from rotation or permitting adjustable movement thereof with respect to said brackets.

l1. A feeder head for shaker conveyers including an extensible trough section, a carrier Vmember mounted for rocking movement' with respect to said extensible trough section, 'a pair of friction grip blocksinounted in said carrier member and adapted to grip said extensible trough section above and below a portion there# of upon certain strokes of the conveyer, means for positioning said carrier member tov cause said grip blocks to extend or retract said extensible trough section at will including a crank yarm, a

connection from said crank arm'to said carrier member, and means for` adjusting the position of said carrier member with respect to said extensible trough section to change the gripping force of said grip blocks including 'an eccentric member mounted for adjustable movement about atrans verse axis and formingva pivotal support for` said crank arm,

12. A feeder head for shaker conveyers including an extensible trough `section'ajfcarrier member mounted for rocking 'movement with re'- spect to said extensible trough section, a pair of friction grip blocks mounted in said vcarrier member and adapted to grip said extensibleftrough section above and below a portion thereof uponl :certain strokes of the conveyer, means for posifly tioning'said carrier memberv to 4cause said 'grip blocks to extend or retract said extensible trough section at will including a crank arm, a connection from said 'crank arm to said carrier member, means for adjusting the position` of said carrier member with respect to said extensible trough section to change the gripping force of saidgrip blocks including an eccentric member mounted for adjustable movement about a transverse axis and forming a pivotal support for said-crank arm," and means for permitting; adjustable turningmovement of said eccentric member, to Vary the angular position of said crankarm, vsaid means also forming a means for 'holding said eccentric member from rotation.

13. kIn a feeding. device for shaker` conveyors, f a reciprocatingl trough section,an extensible trough section adapted to be nested therein, a

lcarrier member havinga. pair of friction grip said crankarm; 144 In feeding .devi@ blocks mountedtherein forextending orf-retract# 'y ingsaid-.extensible trough section withrespect ,tioningf said carriers-member to cause saidfgrip blocks tofextend or retract said extensibletrough, -sectionlincluding a crank arm, a connection; from said crank arrnto said carrier member,l fand.

to A said reciprocating trough section, abracket .piw'itallyconnected to said reciprocatingv trough 1 section, operative connections :fromsaid bracket) to said-carrier :member yforuengaging said grip l blocks `with said extensible ytroughsection }1 1p oncerta-in strokesof theconveyer, means for posi.

means for adjusting the y'angle of said-carrier `5 member with respect Ito' said extensible trough 1 section to change the gripping force of said grip., blocks including aneccentricsleeve mounted-inf) saidbracket' and forming @a pivotal supportfor y b forv shaker conveyors,

carrier member'ha'ving a -pair' of friction gripfblocks mount'edtherein for extending or retracting said vextensible troughsection with respect..

-to 'said reciprocating troughsection, a bracket having pivotal connection'with said reciprocating trough s`ection,1operative connections from .said` vbracket to said carrier member for engaging'said i grip blocks with said extensible trough section upon certain strokes of the conveyor, means kfor positioning said carrier ymember to cause said grip'blocks toextend or retract said extensible troughsection including a crank arm, a connection from said crank arm to said carrier inem-I ber,pmeans'for adjusting the angle of said carrier member with respect to said extensible trough section -to change the -grippingforcecf f said grip blocks including an leccentric sleeve mounted in said bracketl and forming av pivotal `Y support for saidcrank arm, and means pern'iitting said sleeve to be rotatably'moved to .vary the angular position of said crank arm. with respect tosaid bracket, said mea-ns also forming a means for holding said sleeve from rotation.

15.v Acarrier vmember for feeding vi'ievices-yforl shaker conveyers including a frame having an open central portion, apair of friction grip blocks, a pivotal pin for mounting each ofsaid I grip blocks v in` said frame above and belowthe said lower grip block and holding it in adjustandhaving engagement with said pin whichsupy yports said'u'pper Ig-rip block, on opposite sides of, f

Geol i together,"and.a threaded member having engage- Y said grip block, a member vvconnecting said pins ment with said member and frame for moving said'member and upperl grip block towards said-y L l'lower grip block upon turning movement of saidvk threaded member. y f l' 16. A carrier memberlfor feeding devices for lshaker `.conveyors` ir1cludingja vframe having an f above and belowthe open j iortionthereof, said grip blocks being adapted to engagea shaker conveyer trough section above and below a portionthereof upon vcertain strokes ofthe conveyeizh and means for adjustably moving said upper grip .open central `portion, a pair of friction grip 'I 'I blocks .mounted in said frame, a pivotal pin for y mountingeach of said grip blocks in said frame 70y y a reciprocating'trough section, an 4v'extensible trough sectionadapted toibe nested therein, af

lblock including apair of parallel spaced pinsY slidably mounted in said frame and having engagement with said pin whichsupports said upper grip block, on opposite sides of said' grip block, a member connecting said pins together, a threaded member having engagement with said member and frame for moving said pins towards said lower grip block upon turning movement of saidthreaded member, and means for selectively holding said threaded member `from turning movement. l o l 17. A carrier member for feeding devices for shaker conveyers including a frame having an open central portion, a pair of friction grip blocks mounted in said frame, a pivotal pin for mounting each of said grip blocks in said frame above and below the open portion thereof, said 392'() grip blocks being adapted to engage a shaker conveyer trough section above and below a portion thereof upon certain strokes of the conveyer, and means for adjustably movingsaid upper grip block towards said lower grip block and holding it in adjustment with respect to said lower grip block including a pair of parallel spaced pins slidably mounted in said frame and having engagement with said pin which supports said upper grip block, a member connecting said pins together, and a threaded memberhaving engagement with said member and frame `for moving said pins towards said lower grip block upon turning movement of said threaded member, said threaded member having an irregularly formed portion, 15

selectively holding said threaded member from rotation.A

i ERNST BERGMANN. 20

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