US1824580A - Control mechanism for concrete paving machines - Google Patents

Description

Sept. 22, 1931. E. 1.. TRANAAS 1,824,580

CONTROL MECHANISM FOR CONCRETE PAVING "MACHINES Filed Dec. 10. 1929 "I-Shgets-Shet 1 [MENTOR Sept. 22, 1931. a. L. TRANAAS 1,324,530

CONTROL MECHANISM FOR CONCRETE PAVIKG MACHINES Filed Dec. 10, 1929 7 Sheets-Sheet 2 Ti Ej- -9, 46- I IN MEN 70R EfiJiWS ATT ORN EY5 Sept. 22, 1931. E. L. TRANAAS 1,824,530

CONTROL MECHANISM FOR CONCRETE PAVING MACHINES Filed Dec. 10, 1929 '7 Sheets-Sheet 3 Sept. 22, 1931. E. TRANAAS, 1,824,580

CONTROL MECHANISM FOR CONCRETE PAVING MACHINES Filed Dec. 10, 1929 7 Sheets-Sheet 4 Sept. 22, 1931-. 5.1.. TRANAAs 1,824,580

CONTROL MECHANISM FOR CONCRETE PAVING MACHINES Filed Dec. 10. 1929 7 Sheets-Sheet; 5

wri/vro/e BY 23: 1, fi'ms Q I": d A, I, I6 I I ATTORNEYS E. L. TRANAAS 1,824,580

CONTROL MECHANISM FOR CONCRETE PAVING MACHINES Sept. 22, 1931.

Filed Dec. 10. '1929 7 Sheets-Sheet 6 l/VVENTOR Sept. 22, 1931.

CONTROL MECHANISK FOR CONCRETE PAVING MACHINES Filed Dec. 10. 1929 7 Sheets-She'et 7 j 45- 56 o O 21a .93 5 i: 3/ o 0 356 5. E I

If 0 /9 l5 E. L. TRANAAS 1,824,580

. Patented Sept. 1931 or MILWAUKEE, Wisconsin, ASSIGNOB r'o iron-name EMIL I. TBANAAS,

1mm; OFFICE COMPANY,

OF MILWAUKEE, WISCONSIN, A CORPORATION conrnor. nn'cmmsu non concnn'm ravmc mciaznms Application filed December 10, 1029; Serial No. 413,029.

crete mixed bythemixer, acharging skip or' device for elevating the combmed aggregates to charge them into the mixer, and suitable time controlling means determining the discharge action of the machine.

The purpose of the invention is to carry forward by way of improvements and spe- 1'5 cial controls intermediate the various parts of the machine, the inventions embodied in Robb Patents No. 1,370,497 of March 1st,

1921 and No. 1,660,301- of February. 21st,

1928, and Webb Patent No. 1,628,378 of May '10th, 1927, the last patent including particularly a special automatic discharge control mechanism for improving that part of the machine embodied in Robb Patent No. v1,37 0,497, aforesaid.

N ow in the operation of machines for paving-purposes of the type referred to, certain interlocking or cooperative-sequential operations of the various mixing, chargin and discharging instrumentalities are desirable. Again, the overlapping of the operating times of certain operations is necessary as is presented in the Robb Patent No. 1,660,301.

Improved devices for obtaining these results are the subject matter of this invention, and

- anisms so that they will not work in automatic succession, or with automatic overlapped actions, are nowprovided. O

In carrying outthis invefition,.the machine has been-designed to afford what may be called a full automatic operation performing a full automatic cycle to the extent that the action of the u'ward movement of the p trol mechanisms of the machine such that skip, u on charging, starts what is known as the liatchmet'er time control into action and causes the subsequent proper timed op- '-erations of the discharging device of themixing drum, and the later actuation of the skip or charging devicecontrol to'raise the skip to I. lits cliarging'position and thus complete'said additional devices for controlling the mech-- automatic cycle, the supplying of water to the mixing drum for mixing with the dry aggregates being taken care of by the skip operation, as has been previously roposed 1n Y the prior art patents'lierein re erred to.

In the further carrying out of the invention, the'full automatic cycle just above mentioned may be discontinued by operation of a manual controlled instrumentality to the extent of placing the skip raising movement for charging action under the control of the operator. I

Likewise, the automatic cycle above outlined is susceptible of modification by a manual operator, control of the discharge of the mixer which is a power driven ty e of discharge, an instrumentality being mterposed so that if desired, a manual operation of the power discharge may be employed. However, provisions are made so that this manual control cannot be called upon or put intoaction at any time whenthe automatic cycle has been started to the extent of placing the control of the discharge under the action of the batchmeter timin device.

Another phase of the invention is vinvolved inthat portion of the control operationv in which the power discharge chute mechanism is placed under manual control so that the 1 discharge chute may under certain condi tions be moved to discharging or non-discharging positions. When this control is established by the action of proper instrumentalities the operator has withinhis power to hook up the'discharge action of the chute power discharge for the mixer with the automatic means for initiating the raising movement of the charging skip. He need A not necessarily interlock these two actions because provisions are made so that the hook up may be effected or not effected.

A manual provision is made in the conthe automaticinstrumentalities maybe incapacitated to actually cause an operation of the power discharge to effect discharging of the mixer, in which. event these instru mentalities will merely serve to unlock the power discharge to place it under the manual control which has been suggested above as one of the features of the invention.

Specifically new instrumentalities are employed for causin the movement of the power discharge ute to non-dischargingposition, if it be previously in a discharging position, invariably efiected under the action of the raising of the skip to charge.

, chided means such that whenthe discharge chute is in non-discharging position, it wlll not .be controlled-or caused to move to a discharge position under any circumstances by the rising action of the skip. In other words, the purpose of the invention in this aspect is to maintain the discharge chute under absolute control to move to discharging osition as a part of the function of the batc meter timing control device, or under manual control when said chute is not controlled by the batchmeter. But never is it desired to ermit the rising movement of the skip to e ect a discharging action of the discharge chute.

This invention also involves certain other features of construction and operation in charge casing, showing certain o in? the positlon which they occupy during one way or another, related to the foregoing features, and which will appear more fully as this description proceeds.

For a full and more complete understand: ing of the invention reference mayhad to the following description and accompanying drawings,'in whichigure 1 1s a side elevation of the concrete paving machine showing my invention applied thereto, a portion of the distributing boom and the sk1p being broken away and the skip shown in charging position in full .lines and receiving position in dotted lines.

Figure 2 is a fragmentary enlarged elevation of the discharge end of the paver showing the connection between the power discharge unit and the discharge chute for the mixing drum. p

Figure 3 is a vertical, sectional view through the power discharge casing, certain, of the parts being broken away and shown in section, the release mechanism beeased position in dotted lines. Figure 4 is a sectional view taken approximately on line 44of Figure 3, 100 mg in the direction of the arrows.

igure 5 it an endview-of thepower discharge, parts of the casing being broken away to show more clearly certain details of the internal mechanism, i Figure 6 ,is a diagrammatic sectional view through the upper portion of the fpower disthe parts the mixingcycle of thepaver.

shown in set position in full lines and;

Figure 7 is a diagrammatic view similar to Flgure 6, showing the batchmeter control release lever cammed out of operating position, showin the parts in mixing cycle position in full ines and showing the parts at the end of the mixin cycle when the batchmeter has tripped o in dotted lines.

Figure 8 is a diagrammatic plan view of the skip hoist lever push rod actuating mechanism.

Figure 9 is a horizontal sectional view showing the power discharge push rod for actuating the skip hoist lever and the shiftable pin for connecting the power discharge with the skip hoist lever.

Figure 10is av diagrammatic perspective view of the skip hoist lever mounting and the skip actuated mechanismfor the power discharge release lever.

Figure 11 is a vertical sectional view taken approximatelyon line 11-11 of Figure 9, showing the skip hoist lever retractable pin in engaging position in full lines and isengage posltion in dotted lines.

Figure 12 is a view similar to Figure 11, showing a modified form of the invention wherein the ski hoist lever is normally disengaged with relation tothe power discharge pushrod assembly and must be manually engaged to cause automatic engage; merit of the skip hoist clutch, the dotted lines of the figure showing the manually actuated foot lever indepr'essed position;

Figure 13 is a somewhat dlagrammatic showing of the operating parts of the ower 100 discharge as shown in'Figure 3, disc osing the manual means for rendering the batchmeter ineffective to operate the power discharge, certain of the parts and the casing being omitted for the sake of clearness.

'- Geneml features of- 'machrine Like reference characters refer to. like parts in the several figures of the drawings.

A representsthe traction support on 1-10 which is mounted the frame B. The skip C is pivoted at D to the frame and is adapted in one of its ositions to receive aggregates to be mixe and elevated to discharge the aggregates into the mixing drum which is 'revolvabl carried within the frame B. A boom F ispivotally supported by the frame B at the rear of the machine and carries the spreading'bucket G which receives the aggregates after they have been 1% mixed in the inixing druxn'E. A discharge 1 ychute H is ivotally supported by thev frame B and is a aptedto be' swung into discharging position at theen'd of 'th e' mixing 'period by the power discharge mechanism I, forming a partof my invention. 4

A batchmeter J of the usual type is rovided which controls the. mixing perio of. the aggregates within the mixing drum.

I The frame earriesthe engine housing K,

within which is located the power plant for supplyin operating power to the machine.

The sha t L, operated by the engine, car- 1,451,483 of April 10th, 1923.

lever P. The lever Power discharge The power discharge mechanism now to be described may be of different types and the specific devices whichconncct the actual power instrumentalitie's with the discharge chute of the mixer form the basis of a separate application for patent and will, therefore, be very generally referred to below. The power discharge mechanism itself, as hereinafter set forth however, forms a part of the present invention.

vReferring to Figure 2 of the drawings, it will be noted that a shaft 17 extends out of the power discharge case I and carries the crank N affixed thereto, to which crank is attached a link 0 at one end, the other end of the link bein secured to a T-shaped is secured to the link Q, connected to the off-standing arm R of the discharge chute H.' Reference is now made to Figures 1,3, 5, 6 and 7 for an understanding of the mechanical parts within the power discharge casing.

The internal mechanism just mentioned,

I in the casing I, is arranged to shift the crank N throughan-arc of 180 degrees and this action through the linkage O, P and Q causes the discharge chute H to move either to nondischarging positionas shown in Figure 2, or discharging position in which it inclines oppositely and permits the materials mixed in the drum E to flow out of the same into the distributing bucket G.

Figures 3, 4, 13 and 5 perhaps show the parts within the casing I to best advantage. At the top of the casing I is mounted the batchinetenoperated lever 1, connected with the batchmeter aswill'be later described and pivoted to be rocked on the casing'I upwardly and downwardly, upwardly when the batehmeter is to release the mechanism to causethe discharge chute to assume a discharging position; downwardly, when the batchmeteris reset preliminary to a subsequentrelease action for causing the discharge of the mixer. \The lever 1 is carried by a sleeve 2 shown in dotted lines in Figure 5 and similarly in Figure 3 asloose upon the shaft-41. On the shaft 41 is car'- ried the fixed arm 42 which pivotally supports near its upper end, the latch bar3 .g

ving an abutment or shoulder 4 arranged to engageand rock the bell crank release lever 5. The lever 5 has its left arm equipped with a lock lug 6 movable into and out of engagement with a horizontal detent lever 7 pivoted in the casing. The detent lever 7 is adapted to en age at. its free end, the upperend of the cIutch engaging lever 8, and said clutch engaging lever is pivoted at its lower end at 8a in the casing, and is provided with an off-standing arm'8b normally acted upon by the upward expansive acwith the detent 8b underneath which the spring 9 is seated. In effect, therefore, the rollers 10 and the lever 8 rock together, said rollers engaging the thrust disc 11 which is mounted slidably upon the shaft 14, said thrust disc being cooperative with the discs 12 of a multiple disc clutch device to establish a driving relationbetween the driving sleeve 13 and the driven shaft 14 which supports said thrust disc. The driving sleeve 13 is designed to be constantly driven by any suitable connection with the driving shaft L which has previously been referred to and to this'end thesleeve 13 has a driven clutch member 13a.

The shaft 14 has keyed thereon a pinion 15 which meshes with the pinion 16 fixedly carried by the hollow shaft 17. The crank N is secured to the outer end of the hollow with the pinion 19 secured to the thrust disc 11. The thrust disc 11 and the pinion 19 are fixed with respect to'eaeh other but are loosely carried by the, shaft 14. The

thrust disc 11 has diametrically opposite depressions 20 arranged in alignment with the rollers 10 to permit the rollers to relieve the pressure on the multiple disc clutch when the.

lever 8 is-latched to the left, as shown in full lines in Figure 3. A latch member 21 is pivotally carried by the casing and is adapted to drop into the diametrically opposite notches 22 between the flanged extensions 23 of the gear 16, see Figures 3 and 4. This latch member is adapted to holdthe gear 16 and the crank N in mixing or discharging position. As the lever 8 is released by the rocking of the bell crank 5, andthe spring 9 rocks. this lever to the dotted line position in Figure 3, a push rod 24 above the arm 8?) ear 16 to rotate. With the parts in the dotted line position,

is actuated to-lift the'latch 21, permitting the the shaft 17 carrying the gear 16, this shaft drives the pinion 18 which in turn rotates the thrust disc 11 and pinion 19 and an inclined wall 19' leading from the'base of depressions 20 in the disc 11, camsthe lever 8 to the left, permitting the latch 21 to be lowered by gravity and the down pressing spring 21a whereupon it will ride on the flanged periphery of the pinion 16 until the next notch 21 is reached when the latch will drop into the opposite notch 22 and stop rotation of-the chute operating shaft 17; Gaming of the lever 8 to the left will permit the lever 7 to be depressed under the influence of the spring 25 which will allow the bell crank 15 to swing into latching relation with respect to the lever 7 As the latch bar'3 is lowered to shift the bell crank 5, cam member 3 on the bar 3 moves this bar to the rightby coaction with a shaft 46, to thereby disengage it from the bell crank after the bell crank is moved sulficiently to release the lever 7.

When thesrollers 10, associatedwith the lever 8, have moved out of the depressions 20, they ride on the thick portion of the thrust lever 8. abuts with the detent lever 7 which thereafter supports the rollers slightly out of engagement with the base of the depressions 20, thus relieving pressure on the disc 11. and clutch discs 12. At this'time, also, the latch member 21 engages one of the notches 22 to arrest the movement of .the crank N.

The foregoing briefly sets forth the action of controlling 180 degree movements of the crank actuating shaft 17,- and thereby controlling themovement of the discharge chute either from its discharging position to nondischarging position, or vice versa.

Skip operating cm ttrol from power discharge mechanism Referring now. to Figure 8 and also Figures 3 to 7 of the drawings, it is notable that the object now to be accomplished is the operation of the clutch instrumentalities by which the hoisting means for the skip C are thrown into action to raise the skip, through the medium of the power discharge mechanism hereinbefore set forth. With this in mind the description proceeds. 4

The pinion 16 carries on the opposite side from the notched flanged portion a cam 26.

This cam has two functions First, it is the actuating means for a push rod 27 operating the hand lever 51, which throws in the skip hoist clutch, and second, it actuates a crooked I lever 28, see Figures 6 and 7, to move the forked lever 29 to the right to swing the knock-out bar 3a out of, the path of the bell crank release lever 5. The" bar 3a operates in a manner similar to the latch bar 3, but this bar 311 is under the control of the skip.

Thus in the ordinary'operation of the machine, in a full automatic cycle, it is contemplated that the cam 26 of the pinion 16 shall cause the rising movement of the skip C. Figure 6 shows the pinion 16 with the cam 26; also Figures 7 and 8. It will be apparent, therefore, that at a" predetermined time in the rotation of the gear 16 in the power discharge operation, as the chute is turned I from the non-discharging to discharging position, the cam. 26' will act on the roller 48 carried by the push rod 27 and hung on a horizontal arm 56 of the shaft 57, see Figure 8. In this manner,"the cam 26 forces the push rod 27 'rearwardas-see'n in Figures 6 to 8, and since the push rod 27 is attached to a rigid arm 50 on the clutch lever rocker 1 shaft 50a, by a yielding connection, seen best in Figures 9 and 19, as the'spring means 49, the clutch mechanism for causing the operation of the skip C to rise will. go into action.

. It is desired, as previously stated, to incapacitate the skip, so far as its raising operation is concerned, to have any effect upon the power discharge mechanismexcept only in the event that the power discharge chute happens to be in discharging position when the skip goes up. a

With the foregoing in mind therefore, and referring to Figure 10, there are shown provisions such that the upward movement of the skip cannot affect the action of the power discharge mechanism to cause it to operate,

and in this connection see also Figures 6 and 7. In Figure 10 there is illustrated at 30 a roller abutment member supported by an arm fixed to the pivot axis 31 supporting the skip C. The said arm 30 is cooperative with an abutment arm 32 on a stub-shaft 33 which in turn carries a rocker arm 34, spring retracted in action, the rocker arm 34 being connected by a rod 35 with a bell crank lever 36.

The lever 36 is journaled on a stub shaft 36a projecting from the lower portion of the casing I and said lever 36 is furthermore connected by a rod 37 extending upwardly and attached to an arm 38 supported by a shaft 39 which is slightly above the shaft 41 carrying the batchmeter controlled lever 1. The connections just mentioned place under the control of the rising movement of the skip, the rocking of the shaft 39 and this shaft 39 carries an arm 40 supporting the short knockout bar 3a'which has been previously referred to as arranged to connect withthe bell crank release lever 5. Normally the knockout bar.

3a is above the bell crank release lever 5 and capable of rocking the lever5 to release the detent lever 7 and therefore release the 5 clutch engaging lever 8. This knockout bar 3a is norma ly arranged-to actuate the lever 5 so as to make sure that on the upward movement of the skip if the dischar e chute is at its dischar 'ngposition, it wi be returned 1 to its nonscharging position. Since, however, it is not desired to have the knockout bar 3a act upon the arts 5 and 7 in the above manner, if the disc arge chute is already in its non-discharging position, the cam 26 will under such a condition be so adjusted that it will act upon the lower crooked 'end of the crooked lever 28 and will have shifted said lever to the right, as seen in Figure 6, thereby causing the floating link 29 attached'to said 2 lever 28 to abut with and swing to, the ri ht the knockout bar 3a into such a position t at the bar even tho'later swung downwardly by the normal operation of the parts supporting same, will be inefiective and'will not in any way disturb the ad'ustment ofthe discharge chute because of ailure of the ower discharge mechanism to act upon suc chute.

I Manual control to operate discharge chute We have seen that the discharge chute may be caused to operate first by the ,batchmeter actuation of the lever 1 and downward movement of the latch bar 3; secondly, by the operation of the knockout bar 3a controlled 85 by the skip when the chute is in its discharging position as the skip moves upward. There is a third control of this discharge chute action which is manual and is de endent upon the movement of a foot peda 43, seen in 40 Fi ure 5, and in Figure 1,- which foot pedal is xed with the shaft 41 of the upper portion-of the casing I, said shaft 41 sing the axis of the sleeve shaft 2'that carries the lever 1 and also the axis of the arm 42.

I Obviously, if the foot pedal 43 is depressedi it will rock the shaft 41 and cause a thir knockoutbar '35 seen best in Figure 3, to move downwardly and thereby tn the release lever 5.so as to release the clutc engag- 5 ing lever 8 and permit the clutch devices 12 s and 13 to go into action to efiect a 180 degree movement of. the shaft 17 'andits arm N, The foot pedal action just described is therefore simple and may' -be rformed at all times except when the hate eter has taken control, so to speak, of the power discharge mechanism. e

Under the last condition, that is during the time'period that the batchmeter is gov- 6 erning the action of the ower discharge mechanism, the latch bar 3 IS in the position of Figure 6, wherein the toe 44 of the latch 'bar isbeneath the right hand end of the bell crank release lever. 5. Obviously .under this condition, it is impossible for the foot said lever at the end of t -the .allow the foot pedal 43 to take-control of the away from the batchmeter 1 control is established. But after the;batchmeter has completed its period,

'tion be immediately charge of the drum.

pedal to" depress its knockout bar 35 to rock the lever 5 sufliciently to effect a release of the detent lever 7 so that the power discharge chute operating clutch is maintained inoperative by the foot pedal action as previously outlined.

Each'of the parts 3, 3a and 35 has a cam 3' formed upon its inner edge arranged to slide against the shaft 46 to thereby upon downward movement of the particular part having such cam, cause the part to be swun outwardly from a point above the right han end of the crank lever 5 disengaging from he operating .stroke of the parts 3, 3a or 3b, and leaving the lever 5 and associated parts controlling the clutch, lever 8 in a condition to be normalized by means previously described.

4, I show a hand lever 45 as carried outside the casing I and fixed to the shaft 46 previously described. The shaft 46 has a semicircular cam 47 fixed thereto within the easing, see Figure 4 particularly, and by swinging the lever 45 in one direction the cam 47 acts on the latch bar 3 to shift this latch bar rearward as seen in Figure 7 whereby it is inefiective to depress or rock the lever 5 and virtually incapacitate it-so far as afiecting the clutch lever 8 is concerned. Since the latch bar 3 establishes the control between the batchmeter' and the clutch engaginglever 8, obviously when the parts are ad usted as in Figure 7 the batchmeter is powerless to trip the power discharge mechanism into action to operate the chute. Even under the conditions just stated, however, where theparts are as in Figures '7 and 13, the toe 44 of the latch bar 3 still remains in a position beneath the ri ht hand end of the lever 5 and prevents. a s cient amount of downward movementof the right arm ofthe lever 5 to disengage the abutment portion 6 of the left arm of the lever from the ,detent lever 7 Later when the batchmeter performs its release operation at the end of the mixing Ill period, the latch bar 3 will move down as in dotted lines in Fi ure 7Vand render the power dischar the foot al43.' e

.The reason for the above cooperation of parts is that never is it permissible to power discharge once the batchmeter control action at the end'of a it issometimes dedred that the discharge chute though turned over to discharge p061 'canbe mec anism controllable. from nevmt dis- 4 'done readily,owing to the above interlocking of control, and of course, when the batchmeter is not hooked up by its controlof the power discharge mechanism, the foot lever 43 is free at any time to take charge of the tion, the upward movement of t e sk p C would be compelled unless some provision were made to prevent this which rlngs us to the mechanism for the latter purpose, and

for the general urpose of enabling a man-' ual control of t e upward movement of the skilp at any time should it be desired. e

ber resiliently .connected to the rod 27 by' ferring again to Figures 9, 10 and 11,

there has been described already the action of the rod 27 by which the short rocker mems ring 49', may actuated from the cam 26.

he rocker lever 50 is freely mounted upon the shaft50a alongside an auxiliary or complemental rocker lever 51a which directly carries the hand lever 51 previously mentioned. The lever structure 51, 51a is con- =nected to throw'the clutch yoke lever 51?) of rod 51f is directlyattached to a lever 51g of theclutch and brake unit previously inentioned, the action of which-is known and conventional.

With the parts just referred to in mind,

the. problem of this mechanism being described is merely to connect or disconnect .the push rod 27 operatively in relation to the'clutch and. brake unit and especially the clutch feature of the latter. To this end, there is employed amanual control device that is shown best in Figure 11 as comprising a locking pin 52 normally spring pressed by a spring 53 and mounted -upon tlie lower part of the lever structure 51, 51a. 'The pin 52 normally extends intoth e path of movement} of the rocker lever 50 as effected under the 'movementof the rod 27, see Figure 9, and when so extending or projected, obviously the lever structure 51, 51a will be rocked by the movement of the part 50. This will communicate to the clutch means a clutchingoperation initiated from the rod 27, the latterin turn dperated at a certain time in the operation-of the power discharge mechanism including the parts 16 and 26.,

Specifically this operation takes place when position .to the dischargin position so t at the operation of raising t e skip C for charging. the mixer is compelled-to overlap the operation of emptying the mixing drum of, its contents by means of the discharge chute H.

Under the foregoing conditions the action of the skip C to move upwardly is part of a normal automatic cycle of the machine but it ma be desired at times not to have the skip rise to charge the mixing drum under the automatic control of the power discharge mechanism. The skip might not be loaded, or if loaded from a truck, the truck 7 51a, said lever 54 being fixed by a set screw 'to the lock pin 53. Thus as the lever 54 is turned, its cam 54a will act to retract the p1n52 from a position in the path ofmovement of the rocker lever 50 and thereupon if the fpower discharge mechanism operates to shi the push rod 27 there will be no throwing in of the skip hoist clutch by the clutch yoke lever 51b, and no upwardmovement of the skip will automatically ensue.

The manual lever 54 is formed with a cam extension 540 which by a sufiicient movement of the lever 54 may be turned to engage the fixed bracket structure 54d of the machine and by the impinging action of the cam 546' the lever structure 51', 51a is positively held. in a position with the skip hoist clutch disengaged a'nd the skip bracket 510 previously referred to rendered operative so that the skip will be ositively heldin any desired elevated positlon and locked from being lowered until these manually controlled parts are released. It should be noted at this time that the pin 52 would be held out of engagement with the rocker lever 50, and therefore, incapacitated for any action from the power discharge mechanism. 1

The reason for providing the spring 49 is' to be specially noted, because by its use, if

the operator should suddenly observe that the skip C whileunder automatic control of the power discharge, should not be elevated. to charge the mixer, he may quickly grasp the automatic cycle ofoperation to this extent, the spring 49 in these circumstances merely becoming compressed and the rod 27 zlading through its bearing in the rocker lever as a means to doing, the pin 52' will be forced. into the (path rSkz'p rising action nomautonwtz'c There is provided according to Figure 12 aconstruction in which the upward movement of the skip of the machine is not a part of the automatic cycle of operation as hereinbefore set forth. That is to say, the clutch mechanism including the part 516 known as the skip hoist clutch, is normally not susceptible of bein actuated automatically from the power disc arge and must be rendered operative under the control of said discharge by a manual intervention.

, To this end, according to Figure 12,the lockin pin 52 previous y set forth, is normally held out of engagement with respect.

to the path of movement of the rocker lever 50 by means of the spring 53. ,Thus the power discharge may operate as much as it will, and no action is compelled on the part of the skip hoist clutch means. But there is provided a manual lever 58, preferably foot operated which the operator of the machine may depress any time he wishes and by so of movement of the rocker lever 50' an the power for causin the skip hoist clutch to be thrown in, will e now transmitted to the lever structure which comprises the. parts 51a and 51 which hre like those previously described.

In the construction of Figure 12, the lever 54 is adapted to act in an obvious manner ositivel lock the foot lever 58 from being gepresse and whenthe lever 54'- is so adjusted, it is not ossible for the skip C to be raised by the action of the power discharge, and through any depression of the lever 58.

In all constructions of my machine as above proposed, it is evident that the operation of the skip C is always under the control of.the lever 51, thisbeinga highlydesirable feature because of possibilities arising that the skip G should not be raised due to the upsprmging of a peculiar condition occurring in the practical use of the machine.

In accordance with this invention, "it is contemplated to supply water to the mixing drum from a suitabletank or source of supply. From the cycle of operation of the machine, furthermore, t 0 water suppl is turned on to cause water 0 pass into t e mixing drum as an incident to the upward movement of the skip. The water is caused to pass to the drum until the amount required is therein, after which the valve' is turned off when the skip descends.

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

1. In apaving machine, in combination, a concrete mixer, chargin means therefor, di chargin means there or, power operated means or actuating said eharging'and discausing it to act after a predetermined mixing period, power mechanism under the control of they batchmeter for directly operatiw the discharging device, a connection operated by said power mechanism for initiating the operation of the charging device and normally inoperative, and means manually to render said last mentioned connection active.-

3. Ina concrete paving machine, a concrete mixer, a charging device therefor, a discharging device therefor, a single power unit, connections between the power unit and the discharging and charging devices for the actuation of the latter, and separate means associated with the power unit and the charging means for setting said power unit into action, said means beinginitiated into operation b the charging means.

4. Iii

a concrete paving machine, a concrete mixer, a charging device the'refor',a dischargmg device therefor, a power unit, means operatively associated w1th said charging device to be operated thereby for automatically setting said power unit into -act-ion, the power unit including a driving member, connections from the driving member to the discharge device and to the'charging device, and means for resetting the parts of the power unit for "a subsequent operation when said power unit is set into actlon to cause operations of the charging device and discharging device. v 5. In a paving machine, in comb1nat1on, a concrete mlxer, a discharge device therefor, a

eharging'devie therefor, apower unit comprising a dr ving member, an operating connection forinitia ting charging action of the charging device leading from said driving member and'normally inactive with respect to the operation of the driving member, means manually to render said connection active to initiate operation of the charging device by the driving member, and means for setting the power unit into action.

6. In a paving machine, in combination, a concrete mixer, a. discharge devlce therefor,

- a charging device therefor, a power unit comprising a driving, member, abatchmeter,

means between the batchmete'r and said driv-- ing member for setting the latter into operation a manual 7 means separate from the III batchmeter for setting the driving member into action and connections vleading from the driving member to the discharging device for the operation of the latter.

7 In a paving machine, in combination, a

concrete mixer, a discharge device therefor, a Y

charging device therefor, a power unit comprlsmg a drivlng member, a batchmeter,

. means between the batchmeter and said drivtion and connections leading from the driving member to the discharging device for the operation of the latter, and means whereby the action of the driving member, may be caused to initiate the operation of the charging device and normally inactive, together with means manually to render the said last mentioned means active.-

8. In a paving machine, in combination, a concrete mixer, a discharging device therefor, a charging device therefor, a power driving member, an operating connection between the power driving member and the charging device for causing operation of the discharging device ur der a certain condition, and means to prevent operation of the discharging device by the charging device under other conditions.

9. In a paving machine, in combination, a concrete mixer, a discharging device therefor, a charging device therefor, a power driv-- ing member, an operating connection between the power driving member and the charging device for causing operation of the discharging device under a certain condition, means to prevent operation of the discharging device byflthe charging device under other conditions and a batchmeter timing device cooperating with the power driving memberto cause operation of the discharging device after apredetermined time period.

10. In a'pavingmachine, in combination, a

concrete mixer, a discharging device therefor, a charging device therefor, a single powerdriving unit, means intermediate the charglng device, and said power driving unit to cause the dischargingdevice to be operated to i assume non-discharging position when the charging'device is operated to'charge' the mixer, and means to prevent operationof the discharging device by the charging device when said discharging device is in non-discharging position. I

11. In a pavlng mach1ne,a-n combination, a concrete mixer, a dlscharging device there-' for, a charging device therefor, a power dI'iV',

ing unit, means intermediate the charging device and said power driving unit to cause the power unit to operate the discharging device causing the same to assume non-discharging position when the charging device is operated'to charge the mixer, means whereby the charging device is rendered normally in inoperative relation to' the operation of the power driving unit and therefore incapable of operating the latter, and means manually to render sa1d charging device operative relatively to the power driving unit.

' 12. In a paving machine, in combination, a concrete mixer, avdischarging device therefor, a charging device therefor, a owerdriving unit,means to'operate the disc ar e chute from said unit, means to operate thec arging device from said unit, means operable from the charging device to set the power drive unit into operation for the purpose of actuating the discharging device, an instrumentality for preventing the charging device from causing the power unit to operate the discharging device when said discharging device is in non-discharging position.

13. In a paving machine, in combination, a concrete mlxer, a discharging device therefor, a charging device therefor, a power driving unit, connections from the power driving unit for the actuation of the discharging device and for the actuation of the char ing device, an instrumentality cooperating etween the charging device and said power driving unit for causing the unit to operate the discharge device during charging action of the charging device, and another instrumentality rendered operable when the charging evice is doing its charging work to cause the discharging device to move from a discharging position into a non-discharging position, and means manually to render the condition betweenthe power driving unit and the charg ing device active, so that the operation of the power driving unit may initiate a charging movement of the charging device.

15. In a paving machine, in combination,

a concrete mixer, a discharging device therefor, a charging device therefor, a sin le power driving unit for operating the dischar e device and the charging device, and a hate meter controlled by the charging device and in turncontrolling the operation of the pow- .er driving unit.

16. In a paving machine, in combination, a concrete mixer, a discharging device therefor, a charging device vtherefor, a .power driving unit-comprising a clutch controlling device for starting the driving action of the unit, connections from the pbwer driving unit to the discharging device and the charging device for the operation of these parts, a detent lever for normally maintaining the a, concrete mixer, a dischar clutch controlling device so that the power driving unit is inactive and a: batchmeter connected with the power driving unit to release said detent an render the unit active.

17. In a paving machine, in combination, a concrete mixer, a dischar 'ng device therefor, a charging device t erefor, a power driving unit comprising a clutch controlling device for starting the driving action of the unit, connections from the power driving unit to the discharging device and the charging device for the operation of these parts, a detent lever for normally maintaining the clutch controlling device so that the power driving unit is inactive and a batchmet'er connected with the powerdriving unit to release said detent and render the unit active, and means controlled by the char ing device for releasing the said detent an thus rendering the power unit active.

18. In a paving machine, in combination, g device there for, a charging device t erefor, a power driving unit comprising a clutch controlling devicefor starting the driving action of the unit, connections from the power driving unit to the discharging device and the charging device for the operation of theselparts, a detent lever for normally maintaining the clutch controlling device so that the power driving unit is inactive and'a batchmeter connected with the power driving unit to release said detent and render the unit active, and means controlled by the charging device for releasing, the said detent and. thus rendering the power unit active, the power unit,

' comprising a part cooperating with the last mentioned means so as to prevent at certain, tunes the charging unit from releasing said to become active. v 19. In a paving machine, in combination, a concrete mixer, a discharging device therefor, a charging device therefor, a power driving unit comprising a clutch controlling device for starting the driving action of the unit, connections from the power driving unit to the discharging device and the charging device for the operation of these parts, a detent lever for normally maintaining the clutch controlling device so that the power driving unit is inactive and a batchmeter connected with the power driving unit-to release said detent and render ,the unit' active, means controlled by the charging device for releasing the saiddetent and thus rendering the power unit active, and a manual device operable to directly'release the detent and render the power driving unit active.

20. In a paving machine, in combinatibn,

a concrete mixer,'a discharging device therefor, a charging device therefor, apower driving unit comprising a clutch controlling vice for starting the driving action 0 e deth unit, connections from the power unit to the discharging device and the charging'device for the operation of these parts a detent lever for normally maintain ng clutch controlling device so that the power driving unit is inactive and a batchmeter connected with the power driving unit'to release said detent and render the unit active, means controlled b the charging device for releasing the said etent and thus rendering a concrete mixer, a.- discharging device there-- for, a charging device therefor, a ower unit comprising a clutch for connecting a constantly driving part therewith so as to drive the power unit, a detent for normally maintaining said clutch disengaged, a batchmeter,

a connection from the batchmeter including a latch bar for releasing thedetent and causing the clutch to become engaged to set the power unit into operation, and means operated from the power unit when it is set into action adapted to cause operation of the I charging device. '22. In a paving machine, in combination, a

, concrete mixer, a discharging device there for, a charging device therefor, a wer unit comprising a clutch for connecting a constantly driving part therewith so as to drive the power unit, a detent for normally mam- Qtainmg said clutch disengaged, a batchmeter, detent and causing thepower driving unit a connection from the batchmeter including a latch bar for releasing the detent and caus- -ing the clutch to becomeenga ed to set the with the power unit, instrumentalities whereby the manual device on operation ma also release the-detent coacting with the c utch, andconnecting means between the charging device including an instrumentality for causing release of said detent at a certain time in the operation of the charging device.

23. In a paving machine, in combination, a concrete mlxer, a discharging device therefor, a charging device therefor, a power unit comprising a clutch for connecting a constantly driving part therewith so as to drive the ower unit, a detent for normally maintaining said clutch disen aged, a batchmeter, a connection from the atchmeter including a latch bar for releasing the detent and causing the clutch to become enfaged to set the (power unit intooperation, an means operate from the power. unit when it isset intoaction adaptiao ' means between the charging device includin detent at a certain time in the an instrumentality for causing release of sai ration of the charging device, means where y the operatinginstrumentality between the charging device and the said detent cannot be actuated to cause release of the. detent when the batchmeter contrivances for the same purpose are set to control the detent, together with other means which prevents the manual device from operating the detent under the same condition of control of the detent when the batchmeter is set:

24. In a concrete paving machine, comprising a concrete mlxer, a charging device and a discharging device together with a batchmeter for controlling the o eration of the discharging device, a power riving unit comprising a normally constantly rotating part, driving gearing, a clutch for connecting said constantly driven part to the gear: ing, a clutch lever, a spring tending to move said clutch lever to engage the clutch, a detent for normally holding the clutch disenga'ged, and a connection between the batchmeter and said detent for releasing the latter at a predetermined time. p

25. In a concrete paving machine, comprising a concrete mixer, a char ing device and a discharging device together with a batchmeter for controlling the o eration of the discharging device, a power riving unit comprising a normally constantly rotating part, driving gearing, a clutch for connect ing said constantly driven part to the gearing, a clutch lever, a sprin tending to move said clutch lever to engage t e clutch, a detent for normally holding the clutch disengaged and a connection between the batchmeter and said detent for releasing the latter at a predetermined time, a manual device on the power unit, a knockout member operable thereby to releasethe detent, and means such that the knockout member is inactive to release the detent when the batchmeter has been set and is controlling the detent accordingto a fixed period of-time of mixing.

In a concrete paving machine, com- PIlSlIlg a concrete mixer, a charging device and a discharging device, together with a batchmeter for controlling the o eration of g the discharging device, a power riving unit comprising a normally constantly rotating part, driving caring, a clutch for connecting said constant y driven part to the gearing,

a clutch lever, a spring tendin to move said clutch lever to'engage the clutci, a detent for normally holding the clutch disengaged, and a connection between the batchmeter .and said detent for releasing the latter at a predeterminedtime, a manual device on the power unit, a knockout member operable thereby to release the detent, and means such that the knockout member is inactive to release the detent when the batchmeter has been set and is controlling the detent according to a fixed period of time of mixin a separate means on the power unit opera ly connected with the char ing device to be actuated thereby at a predetermined time, a knockout membercarried by said separate means for releasing the' detent from the clutch lever, and means to render the last mentioned knockout member inactive when the batchmeter is set as above. described.

27. Inaconcrete pavin machine, comprising a concrete mixer, a c arging device and a ischarging device to ether with a batchmeter for controlling the operation of the discharging device, a power driving unit comprislng a normally constantly rotating part, driving gearing, a clutch for connecting said constantly driven part to the gearing, a clutch lever, a spring tending to move said clutch lever to engage the clutch, a detent for normally holding the clutch disengaged, and a connection between the batchmeter and said detent for releasing the latter at a predetermined time, a manual device on the power unit, a knockout member operable thereby to release the detent, and means such that the knockout member is inactive to release the detent when the batchmeter has been set and is 'controllin the detent according to a fixed period 0 time of mixing, a separate means on the power unit operably connected with the charging device to be actuated thereby at a predetermined time, a knockout member carried by said separate means for releasing the detent from the clutch lever, and means to render the last mentioned knockout member inactive when the batchmeter is set as above described, and still other means for manually incapacitatin the batchmeter connection to the power unit to prevent it from releasing the-detent so as to thereby prevent the discharge device from being operated by the action of the batchmeter.

28. In a paving machine, in combination,

a concrete mixer, a dischargin device there-. -for, a charglng device there or, a hoistlng lever for the o ration of the charging device 'a ower rivin unit connections be- -lever, and a second manual device cooperative with the first manual device to prevent the operation of the latter for rendering said connections active.

30. A mixer, means whereby to discharge the mixer and means for charging the mixer, the power discharge unit cooperative with the discharge means aforesaid, automatic control mechanism for causing operation of the discharge means, manual means for causing action of the discharge means to move it into and out of operative positions for discharging at will and as many times as desired, and an instrumentality for preventin the actionv of the manual means aforesai when the discharging means is under the control of the automatic means. I

31. A mixer, means whereby to discharge the mixer and means for charging the mixer, the power discharge unit cooperative with the discharge means aforesaid, automatic control mechanism for causing operation of the discharge means, manual means for causing action of the discharge means to move it into and out of operative positions for discharging at will and as many times as desired, and an instrumentality for preventin the action of the manual means aforesai when the discharging means is under the control of the automatic means, the said automatic means including a signal to indicate the time of completion of a lapsed-period of mixing.

32. A mixer, means whereby to discharge the mixer and means for charging the mixer, the power discharge unit cooperative with tion of the means for discharging the mixer in an automatic manner a manual control so connected with the said power discharge unit that after the timing device has been actuated, the ower dischar unit ma be controlled to dlscharge a portion or all 0 the batch from the mixer.

34. In a paving machine, in combination, a concrete mixer, a discharge device therefor, a charging device therefor, a single power driving unit, means for automatically, and means for independently manually causing actuation of the power unit, means connecting the said unit to operate the discharging device, connections leading from the unit for the operation of the chargin device, and manual means for rendering t e power unit inoperative with respect to the automatic actuating means to permit manual control at will thereof. In testimony whereof I aflix my si EMIL L. TRA AAS.

ature.

the discharge means aforesaid, automatic control mechanism for causing operation of the d1scharge means, manual means for causing action of the discharge means to move it into and out of operative positions fordisf charging at will and as many times 'as desired, and an instrumentality for preventin the action of the manual means aforesai when the discharging means is under the control of the automatic means, the said automatic means including a signal to indicate the time of completion of a la sed period of mixing, and a manual device or preventing the discharging means from becoming operative when the signal is operated.

\ 33. In ama'chine of the class described, in combination,a mixer comprising instrumentalities for causing discharge actionthereof and means for charging the same, a timing device under the control of the charging means for timing the period of mixing operation, a power discharge unit associated with the timing device and adapted to be placed in operation thereby for causing ac-

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