US1979915A - Side by side drum mixing machine - Google Patents

Description

Nov. 6, 1934.

E. L. TRANAAS SIDE BY SIDE DRUM MIXING MACHINE:

Filed Dec.

| Il llll ll Il H Illll Il IQ *D m@ 1WD 4 Sheets-Sheet l dreamy Nov. 6, 1934. E. L. TRANAAS 1,979,915

SIDE BY SIDE DRUM MIXING MACHINE Itter muy! Nov. e, 1934.. E L, TRANAAS 1,979,915

SIDE BY SIDE DRUM MIXING MACHINE "led Dec. l, 1930 4 Sheets-Sheet 3 Nov. 6, 1934. E L. TRANAAS 1,979,915

SIDE BY SIDE DRUM MIXING MACHINE Filed Dec. l, 1950 4 Sheets-Sheet 4 .ak 5 sico/vas a #a /za @a Alaska/vas S14/vento@ dhtml/114 Patented Nov. 6, 1934 ii orrice SIDE BY. SIDE DRUM MIXNG MACHINE Emil L. Tranaas, Milwaukee, Wis., assigner to Kochi-mg Company, Milwaukee, Wis., a corporation Application December 1, 1930, Serial No. 499,353

6 Claims.

The present invention appertains to improvements in 'machines knownas concrete pavers, Whichgenerally comprise today as employed in commercial practice, a concrete mixer including =a mixingidrum supported upon a portable base comprising suitable traction -devices and equipped With'arloading skip adapted to receive dry aggregates of the concrete and then to be elevated Aso as .to discharge these aggregates into the mix- 10-ing drum for admixture with water. The paver includes also a distributing mechanism usually in the form of a bucket traversing` a boom. While the inventionis shown as applied to such a'type of-paving or distributing machine, it is to be understood that the newly invented instrumentalities hereinafter presented may be readily employed in lconnection with other distributing mechanism than the boom and bucket type mentioned.

Now in 4thev operation of paving machines wherein a single drum is employed, it is required by specifications or regulations ofdiierent states that the mixing time in the mixing drum shall be at least sixty seconds and sometimes agreater time is required. yThis requirement is necessary in order to insure the integrity ofthe nal mix increasing itsmixing capacity, to which end I employ a-duplex drum arrangement in which the drums for performing the mixing are arranged side by `side.A I furthermore employ a novel form of loading skip of'a construction adapted to feed or load a batch into one of the drums, and while thexmixing yoperation is being performed therein, this skip 'is adapted to return to its receiving position, receive, and then discharge another batch into lthe second.

While the concrete is being mixed in the second.`

drum, the'skip will return to its receiving position again, receive another charge of aggregates, and in due course, beready to supply this fresh charge Aoi? aggregates to the rst drum referred to been to raise the efficiency of the machine by4 which has been continuously mixing while the operation of loading the second drum is being performed.' In other words, from the foregoing, it will be apparent that by putting two drums into action in my paver, a more continuous supplying and dischargingefA the aggregates is permitted because of the ability to work the loading skip faster and the capability of working the discharging instrumentalities at more frequent intervals, and the further capability of the distributor working to do two times the `Work that it would ordinarily perform.

There are employed in the carryingout of my invention, additionally, certain automatic devices that control thealternate charging of the` mixing drums from the skip, the alternateactuation of the water valves controlling the admission of water to the drums, the alternate actuation of the discharge devices for the respective drums, and certain parts establishing interlocking controls between the said parts in orderv that my machine may work at high eiciency along the lines which I have described above.

l `A fullunderstanding of the present invention will be had upon reference to the `accompanying drawings, in which:-

.Figure y1 is a side elevation of a paving machine embodying the invention.

Figure 2 is a top plan view of the main features of the machine showing particularly the side by side arrangement of the drums, parts being omitted.

Figure 3 is a rear view of the machine looking into the charging skip or device, parts being omitted. l 90'` Figure 4 is a view of the machine looking from the front end, or opposite from the view of Figure 3, and omitting the boom and bucket distributing instrumentalities so that the parts that are desired to be illustrated may be more clearly seen.

' Figure 5 is a diagrammatic showing of the mixing cycles of the machine.

Figure 6 is a detail view of gearing and pawl and ratchet mechanism employed for shifting the deiiector in the loading skip from a position in which itwill cause the skip to supply the aggregates to one drum, to a position in which the skip will supply the aggregates to the second drum.

Figure '7 is a view showing more clearly the ratchet device illustrated in Figure 6.

There will first be described, the general instrumentalities employed in my machine, after which there will be set forth theoperation of ioo these instrumentalities in their regular order so as to supply a full understanding of the invention.

Now referring to Figures 1 and 2 particularly, A denotes traction devices illustrated diagrammatically, which carry the base B of the paver frame, the superstructure frame of which is designated C. Supported upon the base of the machine, in any well known manner, and preferably by means of antifriction rollers, are the drums 16 and 17 arranged side by side, in aligned disposition. At the rear end of the machine where it will be supplied with the dry concrete aggregates, is the loading skip 1 which has the usual supporting arms pivotallyccnnecting it with an axis 20 about which the skip is adapted to be raised to discharge its contents into the charging openings of the respective drums 16 and 17. There is mounted in the discharge portion of the skip 1 a deflector 24 adapted to swing about a pivotal point 24a so that in one of its positions, it will cause the aggregates in the skip to discharge through the discharge spout 1b into the drum 17, and this position is illustrated in full lines in Figure 2. When the deflector 24 is moved to the other position of the dotted lines of Figure 2, the contents of the skip may be discharged through the spout 1c into the mixing drum 16.

'Ihe mixing drums are preferably of the type in which annular gear rings 16a and 17a for the respective drums 16 and 17 are utilized. A drive pinion 40, see Figure 3, meshes with a gear ring 16a of the drum 16 and is operated from an engine shaft to turn the drum. Where two gear rings are employed, two driving pinions may be utilized obviously. The gear rings of the drums 16 and 17 have their teeth in mesh so that the drive to the drum 16. may be transmitted to the drum 17. However, if desired, separate drive pinions for the two drums may be utilized and operated from the engine shaft by suitable gearing.

The drums 16 and 17 arefside by side and a water tank 25 is provided to supply water to the drum 16 while a tank 26 correspondingly supplies water to the drum 17. I contemplate utilizing any well known form of three-way Valve 25a to control the passing of water fromthe tank 25 to the drum 16 and to control the admission of water to the tank for replenishment purposes, said water coming from a main line supplying the customary way. Such valve mechanism is known and illustrated by Lichtenberg Letters Patent No. 1,525,100 issued February 3rd, 1925. .A similar valve 26a to the valve 25a is provided for the tank 26 and the drum 17, and to operate the valves aforesaid, there is provided a trip arm 8 which is carried by the axis member 24a of the deflector 24 and movable from a position to actuate the valve 25a to a position to actuate the valve 26a by adjustments caused by the movement of the deflector 24 from one of its positions to the other.

The trip arm 8 is adapted to strike the upper arm 2a of the T-shaped lever 2 carried on the framework of the mixing machine to thereby actuate through a link 25D the valve arm of the valve arm 25a on the upward movement of the skip, thereby to open the supply of water from the tank 25 to the drum 16. On the downward movement of the skip, the trip arm 8 will hit a second arm 2b of the lever 2 and close the water Valve 25a so as to replenish the water in the tank 25. This identical arrangement of trip 'means 2, 2a, 2b. and a linkA 26h is provided for the valve 26a of the tank 26, see Figure 2, and it will be obvious that dependent upon the position of the deector 24, a certain one of the levers 2 will be actuated so as to operate the water valve that is associated with the mixing drum that Ais being charged by the skip 1.

Now it is obvious that it is desired that the skip 1 supply a charge of aggregates to the drums 16 and 17 alternately, and therefore, it is simply necessary that upon each operation of lowering the skip, the defiector 24 shall be shifted from the position wherein it will supply aggregates say to the drum 16, to a position in which it will next supply the aggregates to the drum 17 and so I utilize the up and down movement of the skip for alternately shifting the deflector 24 from one position to the other for the purpose described.

This means employedis very simple and consists of a stationary shaft 20, a stationary gear 19 carried thereby, a pinion 18 actuated by the gear 19 and mounted on a suitableA shaft 18a carried by skip supporting arms. aflixed thereto, a pawl carrier 21 of ratchet mechanism including the ratchet wheel 21a, thefpawls of the pawl carrier being vdesignated 2lb. The pawl carrier 21 and the pinion or gear 18 are a unit and are loose upon the shaft 18a, said shaft 18a carrying fixed thereto the ratchet wheel 21a, previously mentioned. Also fixed on the shaft 18a is the deflector actuating arm 23 connected by a link 23a to the lever 23h pivoted on the frame of the machine, said lever 23h having a link 23c connecting it pivotally with a crank arm 23d affixed to the axis member or shaft 24a that formsthe pivot of the deflector 24.

As the skip 1 is raised, the pinion18 is rotated and also the pawl carrier 21 in a` contra-clockwise direction. At such time, the pawls 2lb freely escape over the ratchet teeth of the ratchet wheel 21a. On the down movement of the skip 1however, the gear 18 rotates in a clockwise direction, turns the p-awl carrier 21 likewise, and the pawls 2lb turn the ratchet wheel 21a and rotate the arm 23 180 degrees thereby actuating the deflector 24 to shift it about 90 `degrees from one extreme of movement to the other, so that the trip arm 8 previously referred to is Vcornespondingly adjusted by such action. f y l This brings us to the discharge devices for the drums and to the batchmeters which are utilized, these parts as separate units, `being well known in this art, and being of suitable construction. Typ-ical of power dischargeA devices such as may be used, are the constructions in the Robb Letters Patent No. 1,660,301, issued February 21st, 1928, Webb Letters Patent No. 1,628,378, issued May 10th, 1927, and Menningen Letters Patent No. 1,648,144, issued November 8th, 1927. Thus there` is a batchmeter 14 for the drum 16, a batchmeter 13 for the drum 17, and a power discharge 5 which is common to the two discharge chutes ofthe mixers 16 and 17, said chutes being designated. 6 and 7.

Now there is employed as a part of thepower discharge, as usual, an actuating member or bar 5a. Instrumentalities are provided to alternately interlock this bar to operate the discharge chute 6 at one adjustment, and thereafter, the discharge chute 7 at a different adjustment of parts. The parts controlling these operations will now be set forth.

The actuating member or bar 5a is pivotally connected at 5b to a sleeve-like coupler bar 15 provided at its ends with pawls or arms 15a and 15b. The arms or pawls 15a and 15b are angularly vdis- The shaft 18a carries,-

rposed;relativeitoxeachzother;so thatwhen'the arm i 15a :isiwoutiofV engagement with'. the .actuating :hook oharai forthechuter, the member lhwi-llbe in :engagement with the corresponding bar 'l 'la l for The coupler bar 15 .'is' rotative forl ladjustment relatively to;thelpartslaand!15b-bye link 12 ftconnecinngaxentral arm 15o of the coupler' har with thearmlZa carried-bya yshaft'12b-'ondas .fiiamework` C. :The shaftfmb carries also arms '10a connected with. alo-.actuating rod 1G andflarm 1:29a connectedswithantactuating rod 29, Ythe 'right ends-f of; whichrods: as seen. inv Figure l, are guided by aeguide bracketil. f-On' the right hand ends of' the rods;101and.29fare` carriedrollers` or similar iabutmentparts) and 28; withfwhichfthe trip arm g8l carrieduhysthe skip isf-adapted to alternately engage, fdependngv upon fits" position of adjustment. Inthefabove manner, by reason of actua- :tioniof the :parts 10 and 29 iroin'the skip, the ,couplerbar lemay be v"properly adjusted to 'ce `preesettoizactuatea particular one or 'the chutes 6 and 'l dependingtuponthe cooperation of the ,parts laand h. "The'shaftlb alsolh'as links ,11; and 11a connected-withthe armsloc and 29s -so thatttheactuation.ofithelrods 10 and 29 may actuate.thetusualpartsofthe hatchmeters 13 and .ilfiewfrereloyl to set eachbatchmeter into operation fwheniitsfarmisiactuatedfor such purpose, after the well knownzrnanner. The batchmetersl and ,14z1nay;be;of,the types shown'by Lichtenberg Lette1-s,;lE?aten`t1 JN0.' Vl,32lglieiLwissued November 11th, 1919zand Winkler: vet al. lPatent/No. 1,282,558, issuedyctober `22nd, 1918.. :Thebatchmeters are,

1 of course, esetitherefore lincidentto actuation of ythepartsli) yand 29 fromthe skip l.

"The batchmeters 13'1and l'4f`control the power discharge mechanism 5 in the well known manner, presented in .the Robb, Webbfahd-lx/icnningen yp'atents'hereinset forth,so as fto set the power ,discharge .intofoperation at a predetermined time, lnamely when Hthe "oatchmeter-controlled-'period of mixing has terminated 'thus causing the power discharge to operate and 'move the actuating bar or member 5c, and thus'turn the particular selected one 'of theidischargechutes 6 andr'lftc fitsproperposition of adjustment; The connecting',` means between Athe ,batchmeter A13 i and the -power:.discharge 5 is elink-15a and the correspondingiconnecting means Vbetween the thatchmeter `114i andipower discharge 5 is the link 14a, see Figures l and 4. i Certain of these connections are ratherdiagrammatically illustrated in the V.drawings because the-constructionsfof power di charge f devices and hatchmeters arefwell known to those versed in the art.' In this connection, reference may be made to the type of power discharge shown by theBathrick Patent No. 898,171, issued SeptemberVr 8th, 1908, and Shafer Patent No. 1,415,411, issued. May 9th, 1922.

When. the power discharge unit 5 is operated, an'arm :31a of the mechanism, seeFigui-e 1, 'actue ates a `link 31 Yconnected Lby 'a loellv crank with a rod 30 that. leads to and is connected with the lower end of a lever e, the upper end or which is beneath the crank 3 which carries a rolleror contact with said lever 4.

At the time of contact between the parts 3 and 4, the lever d will be rockedto the leit at its upper end, see Figure 1. Thisv happens hy reason of the fact that the arm 3 is rigid with theleit pivot bracket of the skip 1,. andthereiiore tilts downwardly when the skip is raised thus come municating to the lever ,fila rocking movement that operates the parts 30, 31 and 31o/to set the power discharge finto action under the control of "the skip, at certain predetermined times. This is for-the purposeoi restoring to non-discharging positions lthatone of the discharge chutes 6 -or 7 which 'happens at the time to be in discharging position. The power discharge mechanism 5 therefore is operable both from the batchmeters and from the skip, to be operated yby the skip vto effect a non-discharging adjustment of a chute, vand to 1be operated from the batchmeters to place 'one or the other of. the chutes in V discharging position for emptying of a particular ymixing drum, lvasinay be required. When in the `operation of the machine a discharge chute 6, or 7, asv the case may he, is moved through operation initiated oy the skip 1 `from a discharging'position to a non-discharging position, the other chute is not aiected.

The preferred operation of my twin mixer, as described, involves maintaining the aggregates being mixed in each drum for a period of sixty seconds according to the diagram of the mixing cycle given in the drawings, but this period may be iixed at whatever time desired, according to the regulations under which the concrete is be*- ing made.

When the sixty second mixing period is em'- ployed for each drum, the discharge chute for the drum 17 will be operated at the completion of the sixty second mixing cycle insaid drum. 34.5 secondeI after the discharge of the drum 1'?, the chute 'l of the drum 16 will be turned over to `discharging position and discharge the contents of that drum. In more simple words, there is an elapsed time of 34.5 seconds between the discharges yof the batches from the two drums. The diagram of Figure 5 shows that the mixing operations of the two drums overlap for a few seconds, the overlapping period being approximately 25.5 seconds.

Now a full cycle ofthe operation of my ma,- chine will he described to 'convey a iinal understanding of the advantages and special operaf' tions, Let us assume that the engine or motor of the machine has been started and the skip hoist clutch 42 has `been thrown in by the manual causes the skip 1 to raise and carry'its contents into one of the mixing drums.

As the skip approaches its upper limit of movement, the roller 3 strikes the cam member or lever f1 and trips the power discharge unit 5 which thereby moves Jche chute 6 into its non-discharg ing position. The trip lever S on the skip ultimately hits the roller 9 of the rod 10 pushing the rod so as to set the batchmeter 1li through the rod 11, also pushing pler bar 15 into engagement with the swing chute operating bar 7o, for the chute '7, and out of engagement with the corresponding bar for the discharge chute 6. The skip, then through well known clutch knock-out mechanism customarily the rod l2 turning the cou- The" actuates the clutch 42 but also controls the brake acting upon the hoist drum 45, so as to permit mixing period for the drum 17 has now been.

started, and the skip is lowered by the operator as above described under the control of the lever' 43. In its down movement, the skip operates the gear 18 to turn the latter in a clockwise direction, and thus cause the pawls 21 and ratchetwheel 21a to move the crank 23 exactly 180 de grees of its lower limit of movement. The crank. 23 is connected, of course, to the deflector or gate 24 and thus thedeflector 24 will swingV from the position shown in full lines in Figure 2 to the dotted line position of Figure 2.

On the down movement of the skip, the lever- 8 hits the valve lever arm 2b closing off the water' supply to the drum 17 and opening the valve to supply water from the main supply to the tank 26..

The skip is loaded again as before. After the: drum has been mixing for a period of 25.5 sec.- onds, a warning bell, of a known type in the art, such as shown by Lichtenberg Patent No. 1,770,-` 176, issued July 8th, 1930 sounds, thus telling the operator that it is now time to again raise the skipy in order to synchronize the operations for the. rest of the day on which the machine is to work.. (It will be understood that as thus far described, the machine is being set into operation so as tolargely work automatically so far as synchronizingy the action of the skip to the actions of the discharge chutes is concerned, the only manual operation that needs to be performed thereafter being the lowering of the skip by the operator of the machine, and also the operation of the boom bucket 46 which travels out on the boom 47 todeliver the material to the site where it is to bey laid.)

As stated above, the skip is now loaded, and is caused to be raised thereby turning on the water by the actuation by the lever 8 of the proper valve lever for the tank 25, the actuating rods 4, 30 and 31 being operated as the skip goes up, but without tripping the power discharge unit, as this cannot be done when the discharge chute is already in mixing position.

This lack of operation is due to the fact that the lever 4 is not in the path of movement of the arm 3. The trip lever 8 having now been turned to cooperate with the roller or abutment part 28 of the rod 29, hits this rod and pushes on the same so as to set the batchmeter 13. At the same time, the rod 12 is pulled thereby operating the coupler bar l5 disconnecting the same from the chute 7 and connecting it with the chute 6 rendering the latter operative by the power discharge. The skip is then lowered by the operator who handles the lever 43, this closing the valve for the water tank 25 and shifting the deflector 24 to the position shownby full lines again.

The skip is again loaded. The mixing period for the aggregates in the drum 17 has now lapsed. The batchmeter 14 releases by its automatic action well known, thus tripping the discharge unit 5, and this being at such time connected to the discharge chute 6, causes turning of the discharge chute 6 to discharge position. The power discharge unit simultaneously under these conditions commences automatically to control the skip and engages the skip hoist clutch through the rod 32, working on the lever 43, thus causing the loaded skip to be'raised automatically trom such time on, though of course, manual interference can be interposed at any time to such automatic upward, movement of the skip if for some reason the opertaor of the machine wishes again to take control.

The automatic operations described above are now repeated, and the skip is brought to the ground manually ready for a new charge. The mixing period in the drum 16 next lapses and the batchmeter 13 releases tripping the power discharge unit 5. The power discharge 5 being now connected to the chute 7, turns this chute to discharging position and automatically engages the skip hoist clutch through thepush rod 32 aforesaid. From this time on the paver works fully automatic, with the exception of the lowering of '.the skip and the operation of the bucket 46 as previously stated, these two operations being manually controlled. 'I'he times of the various `operations are synchronized by the batchmeters :after being established by the operator, when :raising the skip with the second batch.

The foregoing sets forth the preferred mode of :arranging the mechanisms and providing for the .automatic operations, but I wish it to be under- ;stood that my machine might be equipped if de- .sired with one power discharge unit for each drum, instead of using the power discharge unit l5 as a common operating means for the discharges of both drums. Or again, it is Within the purview of my invention to substitute a timing :gear set into operation manually and thereafter possible of working automatically to control the -opening and closing of the valves and the general 'timing of the action of the parts under which conditions, I would do away with the batchmeters.

A type of clutch knock-out and brake control :means usuable for the purposes of this invention is shown in Lichtenberg Patent No. 1,328,635, is- ;sued January 20th, 1920. A

Having thus described my invention, what I Iclaim as new and desire to secure by Letters Patent of the United States, is:-

1. In a concrete paving machine, a plurality of concrete mixers, a charging instrumentality for said mixers movable from receiving to discharging position comprising a control member movable to cause the instrumentality to supply its contents to one mixer on each charging operation of the charging instrumentality, and then another mixer on the next operationl of the charging instrumentality, mechanism to set the control member on each operation of the charging instrumentality automatically so that it will cause alternate charging of the mixers on successive operation of the charging instrumentality, discharge devices for the mixers, means interposed between the charging instrumentality and the said discharge devices to cause the discharge devices to alternately operate for the discharging of their respective mixers, means for synchronizing the action of the discharge devices with the action of the control member of the charging instrumentality, operating mechanism for moving the charging instrumentality to its charging position, mechanism to connect said operating mechanism with the charging instrumentality to move the latter to charging position, and means to synchronize the action of said operating mechanism with the actions of the discharging devices so that automatic action of the operating mechnism may be effected, and manual means whereby to manually initiate the action of the operating mechanism preliminary to synchronization of the working of said operating mechanism with respect to the discharging devices.

2. In a concrete paving machine, in combination, a plurality of mixers, a charging device therefore arranged to perform mixer charging operations, a controlling instrumentality forming a part of the charging device to cause it to supply each mixer at a certain time separate from the time when the other mixer is supplied, discharge devices for the mixers including a power discharge unit, mechanism carried by the charging device for moving the controlling member thereof to proper positions for supplying the mixers at diierent times, and connectingr parts for synchronizing the action of the controlling member of the charging instrumentality with the actions of the discharging devices so that the latter will be operated at different times to discharge the contents of their mixers, the connecting parts for the synchronizing purpose above mentioned including a power discharge unit, a coupler for coupling the power discharge unit to either Aone of the discharge devices of the mixers, and control connections between the controlling member aforesaid and said co-upler substantially as set forth.

3. In a concrete paving machine, in combination, a plurality or" concrete mixers, a charging skip for said mixers movable from receiving position to discharging position, a controlling member on the skip for defiecting the contents of the latter alternately into the mixers upon successive operations oi the skip to charge the mixers, water supply means for the mixers to separately provide a measured quantity or" water for each mixer, discharge devices for the mixers to separately discharge the same, and connections between the water supply means and said discharge devices leading to the controlling member of the charging skip so as to synchronize the actions of the discharge devices and the Water supply means with the movement of the controlling member of the charging skip.

4. In a concrete paving machine, in combination, a plurality of concrete mixers, a charging skip for said mixers movable from receiving position to discharging position, a controlling member on the skip for deilecting the contents of the latter alternately into the mixers upon successive operations of the skip to charge the mixers, water supply means for the mixers to separately provide a measured quantity of water for each mixer, discharge devices for the mixers to separately discharge the same, connections between the water supply means and said discharge devices leading to the controlling member of the charging skip so as to synchronize the actions of the discharge devices and the water supply means with the movement of the controlling member of the charging skip, and other means for controlling movements oi' the discharge devices of the mixers including parts operable by the skip in its charging action.

5. In a concrete paving machine, in combination, a plurality of mixing drums, a charging skip therefor movable from receiving to' =dis charging position, comprising a controlling member movable to one position to cause supplying of the contents oi the skip to one drum, and to another position to cause supplying of the contents of the skip to another drum, mechanism on the skip operable automatically incident to its movement to set the controlling member into the position stated by alternate movements of the controlling member, water supply means for each mixing drum, control connections between the controlling member of the skip and the water supply means to operate the Water supply means for each drum alternately according to the position of the controlling member, batchmeter timing mechanism for each drum, connections between the batchmeter timing mechanism and the controlling member of the skip for alternate operation of said timing mechanism, discharge devices controlled by the timing mechanism of each drum alternately set into operation thereby and including a discharge power unit, manual means to control the movement of the skip after its discharging operations including a hoisting clutch, automatic means intermediate the power unit and said clutch for operating the clutch in synchronized relation to the operations of the discharge devices, and connections intermediate the power discharge unit and the skip independent of those previously referred to whereby certain operations of the discharge devices to assume non-discharging positions may be compelled in timed relations to the operations of the other parts of the machine.

6. In concrete mixing apparatus, a plurality of mixing drums, a charging skip common to said mixing drums and movable to and from receiving and discharging positions, a delector coacting with said skip for deflecting the contents of the skip into one of said drums upon charging movement of the skip, and means for automatically adjusting the deflecting means in the lowering movement of the skip to a position for deiiecting the contents of the skip into the other of said drums upon subsequent charging movement of the skip.

EMIL L. TRANAAS.

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