US1141470A - Distributing mechanism for concrete-mixers. - Google Patents

Description

E. H. LICHTENBERG. DISTRIBUTINQ MECHANISM FOR CONCRETE MlXERS. APPLICATION FILED 001V 2, m2.

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DISTRIBUTING MECHANISM FOR CONCRETE .MIXERS.

APPLICATION FILED OCT. 21, 1912.

Patented June 1, 1915.

4 SHEETSSHEET 2.

an ua ntoz E. H. UCHTENBERG.

DISTRIBUTlNG MECHANISM FOR CONCRETE MIXERS.

APPLICATION FILED OCT- 21, I912.

1 1 4: 1 ,470. Patented June 1, 1915.

4 SHEETS-SHEET 3.

zwzme witnessed may E. H. LICHTENBERG.

DISTRIBUTING MECHANISM FOR CONCRETE MIXERS.

APPLICATION FILED OCT-21,19.

Patented June 1, 1915.

4 SHEETS-SHEET 4- II IIIIIIIIIIIIIIIIIIIIIIIIIllllllllllllIIIIIIIIIIIIIIIIIIIIIIIIIII EHL' 61 Hozwmgs UNITED STATES PATENT OFFICE.

ERICH H. LICHTENBEBG. OF MILWAUKEE, WISCONSIN, ASSIGNOR TO KOE HRING MACHINE 00., OT MILWAUKEE, WISCONSIN.

DISTRIBUTING MECHANISM FOR CONCRETE-MIXERS.

Specification of Letters Patent.

Patented June 1, 1915.

Application filed fictober 21, 1912. Serial No. 727,017.

To all whom it may concern:

Be it known that I, ERICH LICHTEN- BERG, a citizen of the United States, residing at Milwaukee, in the county of M11- waukee and State of Wisconsin, have invented certain new and useful Improvements in Distributing Mechanism for Concrete-Mixers, of which the following is a specification.

This invention relates to improvements in distributing apparatus and more particularly to trolley apparatus for boom carried distributing buckets,

Of the objects in view the essential object is the effective opening and closing of the dumping doors of the bucket, and a further object is the eflicie-nt control of the dumping operation.

I am not aware that it has heretofore been proposed to construct a concrete distributing machine in accordance with my invention wherein a trolley or carriage and a dumping bucket supported thereby are adapted to operate on a boom or equivalent support, in moving to and from the point of discharge, the operating means comprising a cable controlling the movement of said carriage, and operation of the cable being adapted to cause the dumping of the bucket by actuating certain trip means normally holding the bucket closed, and to also control'the automatic normalizing or restoration of the trip means and bucket to charging condition after the dumping operation. Having in view the foregoing and the scope of the appended claims I do not limit myself to the specific instrumentalities hereinafter set forth because they may be varied in many ways so long as the peculiar combinative action above generally referred to is obtained.

In concrete distributing means of the character of this invention, used primarily for street paving purposes, the necessity of automatic operation of as much of the mechanism as it is feasible to so operate, will be appreciated when the purpose of the machine is borne in mind. The distributing means is-essentially designed to receive mixed materials from a power driven concrete mixer. The capacity of such mixers is usually great and by the use of the present invention therewith the mixed materials may be conveyed to the point of distribution with remarkable celerity, by almost Icon- I an enlarged scale.

tinuous backand forth movement of the bucket. A single operator in charge of the mixer oversees the supplying of mixed materials thereto and by reason of the im: provements of the present invention he furthermore controls the distribution of said materials by this boom and bucketmechanism. \Vere it not for the completeness of the control and the automatic action afforded by certain mechanism to bemore clearly described as to details, the speed with which the mixed materials are handled and conveyed to any desired point of distribution within the range of the machine would be greatly retarded, as well as at least one or more additional operators required.

With these and further obiects in view, as \Vlll in part hereinafter be set forth and in part become apparent, theinvention comprises certain novel constructions, combinations and arrangements of parts as herein specified and claimed.

In the accompanying drawings: Figure 1 is a view in side elevation of an apparatus embodying the features of the present invention. Fig. 2 is a vertical transverse section taken on the plane indicated by line 2-2 of Fig. l and looking in the direction indicated by the arrow. Fig. 3 is a detail end view of the convever bucket, shown on Fig. 4 is an enlarged, detail, fragmentary view partly in elevation and partly in section, illustrating the shuttle and adjacent parts of the trolley. Fig. 5 IS a top plan view of the shuttle detached. Fig. 6 is a detail transverse section taken on the plane indicated by line 6 6 of Fig. 4. Fig. 7 is a fragmentary detail section through parts of the clutch throwing levers and showing the shield in plan. Fig. 8 is a view similar to Fig. 1 of a somewhat modified embodiment. Fig. 9 is a vertical section therethrough taken on the plane indicated by line 9-9 of Fig. 8. Fig. 10 is a detail view showing more clearlythc clutch operating handle and connected linkage.

Referring to the drawing by numerals, 1 indicates a mixing drum which may be of conventional type and mounted in the usual manner on the truck 2. From the discharge end of the drum 1 extends the discharge chute 3, and the drum is surrounded bv a gear 4 which meshes with a pinion 5 fixed to a, shaft 6. Upstanding from' the truck 2 is a framework 7 and extending rearwardly from the framing 7 are beams 8 formed with bearings for the shaft 6, the said shaft being disposed preferably substantially midway of the width of framing 7, and at its forward end carrying bevel gear 9, which bevel gear meshes with bevel gears 10 and 11 journaled on shaft 12. Shaft 12 is in turn journaled in bearings 13, 13 supported by forwardly extending brackets 14 fixed to the framing 7. Each bevel gear 10, 11 is fixed to a clutch 15 each of conventional type and provided with a power transmitting sleeve keyed to the shaft 12. A link 17 is pivoted at its upper end to one of the brackets 14 and is formed with a collar surrounding the circumferential groove in the sleeve 16 of the clutch fixed to gear 11 and a similar link 18 is pivoted at its upper end to the other bracket 14 and similarly engages the sleeve 16 of the clutch for the gear 10.

The lower ends of links 17 and 18 are linked together by a pivotally connected link 19, and one of the pendent links, 17, 18, preferably 17, is provided with an operating handle 20 so that the operator may shift thelinks 17, 18 in one direction for operatively connect ing gear 11 to driving shaft 12 in one direction, or the lever 20 may be shifted in the opposite direction for operatively connecting gear 10 to shaft 12 for driving the same in the opposite direction, the gear 9 meshing with bothgears 10 and 11. I

Preferably between the gears 10. and 11 a grooved pulley or sheave 21 is fixed to the shaft 12, and lyingwithin the grooves of and wrapped about the sheave 21 is a cable 22 which extends upwardly from the sheave and is passed about a similarly constructed sheave 23 sustained by a shaft 24 journaled in bearings 25 vertically slidinglymounted in brackets 26 fixed to the upper part of framing 7, said bearings 25 beingengaged by set screws 27 for adjusting the elevation of the shaft 24 and thereby adjusting the tension of the cable 22.

Bolted or otherwise rigidly fixed to the upright framing 7 is a forwardly extending bracket 28 having an outstanding bearing plate 29 on which is mounted the inner bearing end of a boom 30 the said bearing end of the boom being provided with a worm gem 31 meshingwith a worm 32 fixed to a shaft 33 journaled inbracket 28 and carrying a hand wheel 34 for enabling manual swinging of theboom 30 horizontally about its vertical axis, the said boom being pivotally connected-to the bracket 28 by a pivot bolt 35 extending through the bearing plate of the boom and the bearing plate of the bracket. Boom 30 preferably consists of an I-beam, as clearly seen in Fig. 2, the inner or rear end of the beam being fixed to a casting 41 constituting the bearing plate of the boom and affording journals for the shafts of pulleys 36, 37 and 38, the pulley 36 being disposed above the upper edge of the I- beam and the pulley 37 serving merely as a guide, while pulley 38 is disposed with its lower edge below the lower edge of the-I- beam, each of the pulleys 36, 37 and 38 being preferably grooved. The cable 22, or any equivalent means, extends from one side of pulley 23 downwardly and about pulley 36 and thence forwardly or outwardly to the outer end of the boom and is there passed about a guiding pulley 39 journaled in a bracket casting40 fixed to the outer end of the I-beam, the cable extending thence inwardly along the under edge of the I- beam to and being passed about the pulley 38 and thence about the pulley 37 into substantial alinement with pulley 23 and thence upwardly to and about the pulley 23. The cable 22 may thus be endless in its nature but, as hereinafter pointed out, an ordinary cable is employed having its ends fixed to a moving shuttle to be described.

Extending laterally from the main body of the casting 41 are guiding sleeves 42, 42 in which are slidingly mounted guiding bars 43, 43, to the upper ends of which is fixed a shield 44 which shield is of sufficient dimensions to overhang certain of the moving parts and shield them against falling for eign substances. As best seen in Fig. 7, the shield 44 extends beneath the link l9, and fixed to link 17 is an angular arm 45 whose' horizontal arm overhangs the shield 44, and the free end of said horizontal arm is provided with a pin or bolt 46 adjustable vertically into position for being engaged by the shield when the free end of arm 45 is lowered, whereby, when the shield is elevated into contact with said arm the arm 45 and connected parts are adapted to be thrown thereby to the neutral position, as hereinafter set forth.

A trolley or bucket carriage 47 is mounted to run on the boom30, the carriage being preferably provided with flanged wheels 48, 48, journaled on pins carried by upstanding arms of the trolley carriage, the several wheels 48 being mounted to roll upon the lower flanges of the I-beam comprising the boom 30. Bail-like arms 49 are fixed to and depend from carriage 47 and at their lower ends are fixed to and support bucket 50. J ournaled transversely in the carriage 47 is a shaft 51 to which are fixed crank arms 52 which are preferably disposed within the planes of the outline of the carriage and beneath the boom, said arms being carried by a sleeve 52 fixed to shaft 51 between the sides of carriage 47. Bucket 50 is of the openable or dumping type, having the bottom doors 50 which are engaged by links 53, 53', said links extending upwardly and being connected to a link 53, the upper end of which isrfixed to an arched; rigid linksection 54. Link section 54 extends between arms 52 and has its free end pivoted to the free ends of said arms by pivot pin 55, the rigid link section 54 being arched to extend past shaft 51 for allowing the free, upper ends of arms 52 to lie at one side of the vertical plane of the axis of shaft 51 while the lower end of link section 54 lies at the same side of said plane, and an intermediate portion of the link section engages the sleeve 52" at the other side of said plane, arms 52 being thus held by weight against movement in one direction and being positively held by the engagement of link section 54 with sleeve 52" against movement in the other direction.

The shaft 51 extends beyond the trolley carriage 47 at one side and the extension of the shaft carries a trip arm 56 which is limited in the amount of its swing by stops 56', 56' outstanding laterally from carriage 47. The free end of arm 56 is preferably provided with a handle 57 enabling manual manipulation. Extending inwardly from the free end of arm 56, that is extending in an opposite direction from the handle 57, is a. boss 58 which, when the handle is disposed in its forward position, that is when the doors 50' are opened, is positioned for enaging a cam or trip arm 59 depending row a bracket 60 which is fixed to the I- beam of the boom adjacent the inner or rear end thereof, the arm 59 being disposed to engage the boss 58 just rior to the arrival of the trolley carriage 4 at its innermost position.

As best seen in Figs. 4, 5 and 6, the carriage 47 has its respective .side members formed with longitudinal guiding grooves 61, 61, and lying transversely of the carriage 47 with its ends extending into and adapted to be guided by said rooves, is a shuttlelike sliding block 62, t e extent of possible movement of the block 62 being limited by the length of the grooves 61. Cable 22 has its end portions fixed to the block 62, preferably as illustrated in Figs. 4, 5 and 6 wherein the end portions are shown as wrapped about the block and bound in place by a clamping plate 63 pressing the engaged portions of the cableinto a recess 64 in the block, the plate 63 being retained in lace by a clamping bolt 65 extending throng the plate and block 62. Beneath block 62 is arranged a plate 66 through which bolt 65 extends, said plate 66 being also engaged by bolts 65', 65' also assed through block 62, the end portions of cables 22 bein clamped between plate 66 and block 62. late 66 is formed with a forwardly extending portion terminating in a bearing 67 in which is journaled a shaft 68 carrying a pair of trip fingers 69, said fingers 69 bein fixedly connected together by a cross web 0 which may fingers being tapered, as at 71, for readily passing beneath and causing the fingers 69 to engage the projecting ends of the pin 55. The upper portions of fingers 69 which extendabove and beyond shaft 68 are provided with inwardly extending bosses 72, 72 in the path of inovement of which bosses are disposed cams 73 fixed to the under faces of the lower flanges of the boom.

As best seen in Fig. 2, the guiding bars 43 are provided, each on its inner face, with plates 74, 74 whose lower edges terminate above the lower guiding eyes 42, and rearwardly extending arms 75 project from and are fixed to carriage 47 and have their inner or rear ends tapered, as at 76, for forming cams adapted to pass beneath the lower edges of the plates 74 for elevating the same and correspondingly elevating all the connected parts, with the result that the shield 44 is elevated when the carriage 47 is moved inwardly from the position seen in dotted lines in Fig. 1 to the position seen in full lines therein, the upward movement imparted to the shield being suflicient for elevating the free end of angular arm 45 and thus throwing the lever 20 and connected parts to the neutral osition whereby the inward movement of t e carriage 47 is automatically stopped. -It is tobe observed from the structure illustrated that outward movement of the carriage is adapted to be controlled by manual manipulation of lever 20.

' The outer or free end of the boom 30 may be sustained in various well known and conventional ways, but by preference the frame work 7 ivotally sustains a pair of links 77 in the ree ends of which is journaled a pulley 78, preferably of the groove type, about which is passed a sustaining cable 79. one end of which cable is fixed to a casting 80 which latter is fixed to the forward portion of the boom 30. A Windlass 81 is sustained by casting 80 and the opposite end of cable 79 from that fixed to the casting is attached to the Windlass so that a portion of the cable is adapted to be taken up or paid out according to the elevation desired for the boom 30, the Windlass being provided with a ratchet wheel 82 engaged by a pawl 83 adapted for sustaining the boom in a given adjusted position. A hand wheel 84 or other suitable operating means may be provided for actuating the Windlass.

In operation, the parts being in the position indicated in full lines in Fig. 1, as the drum 1 is rotated, the requisite charge of concrete or other matter to be delivered is and thereupon the operator throws the lever 20 inwardly or toward the left as viewed in Fig. 2, whereupon the sheave 21 is rotated in the direction for hauling in on the portion of cable 22 above boom 30 and paying out the other portion thereof, whereby the carriage 47 is moved outwardly along the boom. The first effect of this movement of the cable is to move the slide block 62 from its rear position to its foremost position, and the next effect of the continued movement of the cable is to draw the carriage 47 and connected parts outwardly, in the continued movement of which the bosses 72 pass beyond the cams 73 and thus the inner ends of fingers 69 are permitted to drop below the planes of the extended end portions of pivot pin 55 in position for engaging said pin when movement of the cable 22 is discontinued. The outward movement of the carriage 47 continues until the bucket 50 arrives at the desired point, whereupon the operator moves the lever 20 outwardly to its neutral position. The movement of the cable 22 thus ceases but the momentum of the bucket 50 and carriage 47 causes the carriage to continue its outward movement until the sliding block 62 is disposed at the inner end of the guideways 61. Thus the continued movement of the carriage under its momentum has the same relative effect as if the slide 62 were moved inwardly or rearwardly, whereby the fingers 69 are caused to engage the projecting ends of pivot pin 55 and swing the connected parts rearwardly past the vertical plane of the axis of shaft 51, whereupon the doors 50 are free to drop to their open position and the parts fall to the position indicated in dotted lines in Fig. 1. While this dumping of the bucket is usually accomplished by the momentum of the bucket and carriage so that the ends of pin 55 actually engage the fingers 69 and remain comparatively stationary while the carriage continues its movement, thus accomplishing the tripping action, it is apparent that if the operator desires to hasten the tripping of the door supporting devices he may readily do so by throwing the lever 20 outwardly past the neutral position and thus not only stopping the movement of the cable 22 in the direction for moving carriage 47 outwardly but imparting a return impulse to the carriage, and in that event the fingers 69 will not only be relatively disposed to engage pin 55 but will also be movedin an active sense toward the projecting ends of pin 55 and thus actively swing the crank arms 52 over beyond the axis of their pivot. The relative disposition of the slide means including the block 62. and the tripping device including the crank arms 52, namely in spaced relation to one another normally so i that the slide means is movable a certain distance independently of the trip means, is highly important to this invention. It is evident that the weight of the load in the bucket 50 is sustained by the doors of said bucket and by the connections intermediate said door and the arms 52. Therefore, in the discl a 'ge of the bucket the load contained the latter must be slightly elevated so as to permit the pivot 55 to move upward as it passes from one side of the axis 51 t the other side to open the doors of the biifket. A very considerable amount of force hould be exerted against the arms 52 under these conditions in order to disa charge the bucket, and such force is obtained primarily on account of the provision of the slide means 62 which on stopping of the cable will impinge the parts 52 with a hard hammerlike blow and thus effect the desired operation of the tripping mechanism to open the bucket. After the discharge, the operator moves the lever 20 outwardly for throwing in the other clutch and reversing the direction of movement of the sheave 21. with a resultant reverse in the direction of movement of cable 22. If he so desires, the operator may then disregard the mechanism and leave it to take care of itself, with the result that as the carriage 47 approaches the inner end of the boom the cams 76 will pass beneath plates 74 and elevate the shield 44, striking the downwardly extending inner end of angular arm 45 and elevating the same, at the same time moving lever 20 inwardly to its neutral position and of course releasing the clutch. Should the operator so desire, he can, of course, throw the lever 20 to its neutral position during the inward travel of the bucket before it reaches the inner end of the boom and thus stop the inward movement of the parts. As the carriage 47 approaches the inner end of the boom, the bosses 72 of fingers 69 first strike the cams 73 which elevate and sustain the fingers in their elevated position, and the boss 58 next strikes the cam 59 and throws the lever arm 56 over to the position indicated in full lines in Fig. 1, the parts connected to the shaft 51 being thus elevated to the full line position seen in Fig. 1, the doors 50 being moved by such elevation to their closed position, and the parts are then in condition for the next cycleof operation.

The details of the driving mechanism, drum, bucket and boom being the same in the structure seen in Figs. 8 and 9 as that above described, the same reference numerals have been applied and the same description is applicable. Only the modified features will be set forth in detail. Carriage 47' differs only in contour from carriage 47 and sustains bucket 50 in the same manner as above described except that cables 53 are provided and their upper ends are connected with curved link sections 54' whose upper ends are pivotally sustained by laterally extending bosses 55' projectin from the free ends of crank arms 52' fixed to pivot or rock shaft 51, a laterally projecting portion of which is engaged by trip arm 56 having a boss 58 whose path is intercepted by trip cam 59, the arm 56 being provided with the operating handle 57. o slide or shuttle block is employed in this construction, but instead a tripping finger 85 is preferably formed integral with the lower ends of arms 52', the free end of the finger 85 being bifurcated and pivotally engaged by links 86, 86 each of which is engaged by the respective end portion of cable 22.

In operation, when the parts are in the position indicated in full lines in Fig. 8, the clutch is thrown for moving the carriage 47 outwardly, the relative position of the parts remaining the same during outward travel, and when the bucket 50 has arrived at the desired location the operator throws the clutch to the neutral position, and the cable 22 thus discontinues movement, the momentum of the carriage 47' and bucket 50 being sufiicient to cause the carriage to move past the point at which the cable 22 discontinued movement, whereby the connection of the links 86 with the finger 85 causes the arms 52 to be swung rearwardly beyond the vertical line-of the axis of shaft 57, whereupon the bottom doors of the bucket are permitted to drop to the open position. Or reverse movement may be imparted to the cable for actively forcing finger 85 to trip arms 52. The return movement of the carriage 47 is accomplished by throwing in the other clutch, the bottom doors remaining open during this return movement and until the boss 58 engages cam 59 and causes the arm 56 to elevate the connected parts and thus close the doors, the final closing movement being accomplished just as the carriage 47 arrives at its innermost position.

It will be observed that the arrangement of the trip arm 59 is such that when the carriage 47 is at the inner limit of its movement on the boom 30, the means controlling the opening of the bucket 50 is locked from operation. In other words, in the normal position of the parts of the apparatus, during the process of filling the bucket 50 from the mixer 1, the members 56 and 59 so abut with one another that there is no liability of accidental opening of the bucket since the engagement intermediate the arts 56 and 59 is practically a locking relation until the carriage 47 moves outwardly sufliciently to separate the parts 56 and 59.

Having thus described the invention, what is claimed is:

1. In combination, a boom, a cam carried thereby, a carriage mounted to travel along said boom, a bucket supported by the carriage, discharging means for the bucket comprising a trip arm engaged by said cam when the bucket is in its charging position so that the discharging means cannot be operated while the carriage is in its charging position, and a cable connected with the carriage to move the latter along the boom to a bucket discharging position so as to disengage the trip arm from the cam whereby to render the discharging means operative.

2. In a concrete distributing machine, in combination, a boom, a carriage arranged to travel along the boom, a bucket suspended from the carriage and having bottom doors, discharge means for said doors comprising a trip arm pivotally mounted on the carriage, a cam so positioned on the boom that when the carriage and bucket are in their normal charging positions said cam is maintained in engagement with the trip arm aforesaid to prevent liability of operation of the latter and discharging of the bucket, and cable means connected with the carriage to move the carriage and bucket on the boom to a discharging position wherein the trip arm is released from said cam and the d scharg ng means therebv rendered operable.

3. In a concrete distributing machine. the combination, with a boom. of a carriage movable lengthwise thereof. a bucket supported thereby, trip means for discharging the bucket, actuating means sustained by the carriage and shiftable independentlv of the bucket and .trip means to impinge against and actuate the latter and leave the same free to be normalized, a bucket sustained by the carriage, means for operating the carriage and connected with the actuating means to thereby cause the latter to impinge the trip means to discharge the bucket, and means to automatically normalize the trip means.

4. In a concrete distributing machine, in combination, a boom, a carriage mounted thereon and provided with spaced guides, a slide mounted for movement in said guides, a cable permanently connected with said slide to shift the slide relative to the carriage and to move the slide and carriage simultaneously, a bucket supported by the carriage and having bottom, doors and means intermediate the slide and said bottom doors of the bucket com rising a trip member engageable by the sli e in its moveand bucket move toward discharging position. 4

5. In a concrete distributing machine, in combination, a supporting structure, a carriage mounted thereon, a bucket supported by the carriage, a cam ofistanding from the said structure at a side thereof, bucket discharging means including a trip device supported on the carriage, an arm connected with said trip device and normally engaging said ofi'standing cam to hold the trip device in a position maintaining the bucket closed and preventing discharging of the same, cable means for operating the bucket, a slide supported within the carriage and housed thereby so as to coact with the trip means to discharge the bucket, said carriage having guides in which the slide is mounted, and a connection intermediate the cable means and the s ide so that relative movement of the carriage and slide may be effected as well as simultaneous movement of these parts under the control of the cable means.

6. In a concrete distributing machine, the combination, with a boom, of a carriage movablelongitudinally thereof, a cable for actuating the carriage having a shiftable connection with the carriage and being shift- ,able independently of the carriage relative to the boom, a bucket sustained by the carriage, means controlled and actuated by the shiftable connection for dumping the bucket when the cable and carriage are moved relatively independently of each other. and a device for normalizing the last mentioned means to thereby close the bucket preliminarv to recharging the same and locking said means from operation-until the bucket is mo ed in a direct on to discharge same.

7. In a concrete distributing machine, the combination with a boom, ofa trolley carriage movable longitudinally thereof, an openable bucket sustained by said trolley carriage, an arm pivotally carried by the carriage, means connecting the' openable port on with the arm for sustaining the bucket closed when the arm is disposed at one side of the axis of its pivotal mounting, a member shiftably mounted between the sides of the carriage to coact with the arm whereby said arm may be swung to the other side of said axis for opening the bucket, cable means connected with said shiftable member to actuate it and also to move the carriage on the boom, and means including an automatically operable member connected with the pivot of said arm for restoring the arm to the bucket closing position during movement of the trolley carriage in one direction.

8. In a concrete distributing machine, the combination with a boom, of a trolley carriage movable longitudinally thereof, a cable for operating the carriage, an openable bucket sustained by said trolley carriage, an

arm pivotally carried by the carriage,means connecting the openable portion with the arm for sustaining the bucket closed when the arm is disposed at one side of the axis of its pivota mounting, a cable-controlled means freely ovable on and connecting the carriage and {said cable and engageable with said arm to swing it to the forward side of said axis for opening the bucket, an arm fix d to the ivot of the first mentioned arm and a member cooperative with the second mentioned arm for moving the same in a direction for restoring the first mentioned arm to the door closing position during movement of the carriage.

9. In a concrete distributing machine, in combination, a support, a carriage movably mounted thereon, actuating means for the carriage, a bucket sustained by the carriage, a dumping door for said bucket, means connected to the door for retaining said door in closed position and operable for discharging said bucket, and means for rendering the last-mentioned means inoperative while the bucket is in its charging position, and for restoring the bucket to normal condition after discharge of the same.

10. In a concrete distributing machine, the combination, with a support, a carriage movably mounted thereon and an openable bucket sustained by the carriage, of a trip device adapted to sustain the bucket in closed condition, a block slidingly mounted on the carriage, and a trip finger pivotally carried by the block and adapted when the block is slid on the carriage to engage the trip device for tripping the same to a position effecting opening of the bucket.

11. In a concrete distributing machine, the combination, with a support, a trolley carriage movably sustained thereby and an openable bucket sustained by the carriage, of a trip device mounted on the carriage and adapted to sustain the bucket in closed condition, the carriage being formed with guideways, of a sliding block mounted in the guideways and adapted to be limited in its movement thereby, a finger pivotally carried by the sliding block and adapted to at times underhang the trip device for tripping the same and at times to overhang the same, and means for moving the slide in its guideway to and from a position with the finger extending past the trip device to a position with the finger at one side thereof.

12. In a concrete distributing machine, the combination, with a boom, a trolley carriage mounted thereon and movable longitudinally thereof, and an openable bucket sustained by said .ca'rriage, of a trip lever sustained by the carriage and connected to normally retain the bucket in closed condition, a slide movably carried by the carriage, a trip finger pivotally sustained by the slide, meansfor moving the slide to and from a position with the finger extending past the trip lever for enabling the finger to engage and trip the lever, and means on the boom for at times elevating the finger out of the path of the lever.

13. In a concrete distributing machine, the combination, With a boom, a carriage movable longitudinally thereof, and sustained thereby, and an openable bucket sustained by the carriage, of a trip lever connected to sustain the bucket in closed condition, a slide movably carried by the carriage, a cable for actuating the carriage connected with the slide for moving the same relatively to the carriage, a finger pivotally sustained by the slide and movable to and from a position extending past the trip lever whereby the finger is adapted to trip said t'rip lever for opening the bucket, means for moving the trip lever to a position closing the bucket, and means for elevating the finger out of the path of the trip lever.

14. In a concrete distributing machine, the combination with a boom pivotally mounted at its inner end, a carriage movable longitudinally of and sustained by the boom, and an openable bucket sustained by the carriage, of a slide movably sustained by the carriage, a cable connected to the slide for moving the same independently of the carriage and for moving the carriage along the boom, a trip arm pivotally sustained by the carriage, connections for the trip arm with the bucket for sustaining the bucket normally in closed condition, a pivoted finger carried by the slide and adapted to be moved thereby to and from a position extending past the trip arm, said finger being adapted to engage the trip arm during certain movement of the slide for tripping the arm for opening the bucket, a cam adjacent the inner end portion of the boom for elevating the finger out of the plane of the trip arm, means for restoring the trip arm to its bucket-closing position, and a cam sustained by the boom in position for actuating the last mentioned means.

15. In a concrete distributing machine, in combination, a supporting boom, a carriage movably mounted thereon, a bucket supported by said carriage, a dumping door for the bucket, means for moving the carriage back and'forth on the boom to bucket charging and discharging positions, trip means, connections between the trip means and the door, said moving means including means for operating the trip means to open the door of the bucket when the carriage reaches its discharging position, and means supported independently of the carriage and trip means for restoring the bucket to its normal condition as the carriage returns to charging position and locking the trip means from actuation.

16. In a concrete distributing machine, in

combination, a supporting boom, a carriage movably mounted thereon, an openable bucket supported by said carriage, means for actuating the carriage, trip means to cause opening of said bucket after moving the same, and means for restoring the trip means to a position enabling charging of the bucket and locking the trip means against being operated while the carriage remains in its charging position.

17. In a concrete distributing machine, in combination, a supporting boom, a carriage movable on said boom, a cable for operating said carriage, a bucket supported by the doors,'trip mechanism sustaining theload i'n said bucket and normally holding the doors in closed position, an operating cable for causing movement of the carriage, back and forth on the support, a member connected with the cable in close relation to the trip mechanism and movable on the carriage independently of said trip mechanism to engage the latter and trip same to open the bucket, means 'to automatically normalize the bucket after dumping. and means for actuating the cable.

19. In a concrete distributing machine. in combination. a support. a carriage movable along the same, a bucket sustained by the carriage, dumping doors on said bucket, trip mechanism for opening said bucket; and normally holding the doors in closed position, an operating cable for causing movement of the carriage back and forth on the support, a slide mounted on the carriage in spaced relation to the trip mechanism but close thereto, av connection between the slide and cable, and means for controlling the op-- eration of the cable to cause the slide to impinge and trip the trip mechanism to open the bucket.

20. In a concrete distributing machine, in combination, a support, a carriage movable alon the same, a bucket sustained by the carriage, dumping doors on said bucket, trip mechanism for opening said doors and normally holding the latter in closed position, an operating cable. for causing movement of the carriage back and forth on the support, a movable connection intermediate the carriage and cable and having an operating portion spaced from the trip mechanism in close relation to the latter, means controlling the cable adapted to place the latter under tension to thereby cause cooperation of the said connection with the tri mechanism to automatically open the hue et, and means coacting with the trip mechanism to forcibly restore the same to normal position and closing the bucket under the control of the cable. a

21. In a concrete distributing machine, in combination, a boom, a carriage mounted to travel along said boom, a bucket supported by said carriage and adapted to be dumped when the carriage reaches a desired position in its travel along the boom, a cable for moving the carriage backand forth on the boom, and cable controlled means for dumping and automatically restoring the bucket, said means comprising a shaft mounted on the carriage, trip mechanism including an arm on said shaft movable to cause dumping of the bucket, a connection intermediate the carriage and cable including a pivoted member mounted for movement on the carriage independently of the said arm and having an arm-engaging portion shiftable by said cable into positions wherein said arm-engaging portion is spaced from the arm and wherein said arm engaging portion is caused to impinge against the arm to operate the trip mechanlsm, and means including a member connected with said shaft for normalizing the bucket when the carriage reaches a-certain point in its travel on the boom.

22. In a concrete distributin machine of the class described, the combination of a boom, a carriage mounted to travel back and forth along said boom, a cable for effecting said movement of the carriage on the boom, a bucket supported by the carriage and having dumping doors, trip mechanism for said dumping doors including a shaft mounted on the carriage, a trip arm projecting from said shaft and adapted to assume a position at one side of its axis to holdthe dumping doors of the bucket closed, connections between the trip arm and the dumping doors, an operative connection between the cable and the carriage comprising a pivoted member connected with the ca 1e and shiftable on the carriage into positions wherein said member is spaced from the trip arm but capable of movement separate from the movement of the carriage to act on the trip arm and thereby move the same to the other side of its axis to dump the bucket, a second arm fixed to the shaft carrying the trip arm, and means cooperating with the second mentioned arm to act on the trip mechanism to restore the bucket to charging condition under the control of the carriage by the cable.

23.,In a concrete distributing machine, in combination, a support, a carriage mounted to traverse said support, a dumping bucket supported by the carriage, trip mechanism on the carriage for causing dumping of said bucket, an operating cable for moving the carriage on the support, a shiftable connection intermediate said cable and carriage and comprising a pivoted finger adapted for movement on the carriage independently of the trip mechanism to impinge against the latter and cause dumping of the bucket, and means under the control of the carriage by the cable for automatically restoring the trip mechanism to a position to normalize the bucket for charging purposes.

24. In a machine for distributing mixed materials for making pavements, the combination with a boom, of a carriage movable along the same, a distributing bucket sustained by said carriage, trip mechanism on the carriage co-acting with the bucket to normally hold the latter in charging condition, an operating cable for moving the carriage back and forth on the boom, means intermediate said cable and the trip mecha nism for controlling dumping of the bucket by operation of the cable at will during movement of the bucket and leaving the trip mechanism in a condition to be normalized, and means to normalize the trip mechanism to restore the bucket to charging position also cooperative with said trip mechanism under the control of the said cable.

In testimony whereof I affix my signature in presence of two witnesses.

ERIGH H. LIGHTENBERG.

Witnesses:

E. F. HOLLENSTEINER, G. H. MILLER.

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