US1478945A - Boom and bucket for concrete pavers - Google Patents

Description

Dec. 2-5 1923.

C. E; FOOTE BOOM AND BUCKET FOR CONCRETE PAVERS Filed March 21 1922 4 Sheets-Sheet l 8 nuzmtoz (hag/Zea 5'. F601? Dec. 25 1923.

C. E. FOOTE BOOM AND BUCKET FOR CONCRETE PAVERS Filed March 21. 1922 4 Sheets-Sheet 2 Iai -l Z:-

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C. E. FOOTE BOOM AND BUCKET FOR CONCRETE PAVERS Filed March 21. 1922 4 Sheets-Sheet 5 3 mm: 1 1 oz k mrlgs EEOZ? Dec. 25 1923.

C. E. FOOTE BOOM AND BUCKET FOR CONCRETE PAVERS Filed March 21. 1922 4 Sheets-Sheet 4 Snow M01, C/zanles E. Eat-e 3% M az u ZHI

Patented cc. 25, 192.

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CHARLES E. FOOTE, OF NUNDA, NEW YORK, ASSIGNOR TO THE FOOTE COMPANY, OF NUNIDA, NEW YORK, A CORPORATION 0]? NEW YORK.

BOOM AND BUCKET FOR CONCRETE PAVERS.

Application filed March 21, 1922. Serial No. 545,458.

To all whom it may concern:

Be it known that CHARLES E". Foo'rn, a citizen of the United States of America, residing at N nude, in the county of Livingston and State of New York, has invented certain new and useful Improvements in Booms and Buckets for Concrete Pavers, of which the following is a specification.

My invention relates to new and useful improvements in concrete pavers and more particularly to the boom and bucket thereof, andthe manner of driving and operating the bucket on the boom.

In an application filed by me on the fifth day of March, 1920, Serial No. 450,014, and resulting in Patent Number 1,443,354, Jan. 30. 1923, there is shown a boom and bucket of very similar construction, the invention in the present application consisting of a different form of drum for the operation of the cable for operating the bucket in its inward and outward movements, a difierent sort of drum for the operation of the tripping cable, and also a different form of antomatic means for assuring that the bucket will be in its closed position when at the innermost end of its travel.

It is desirable in concrete pavers wherein a boom and bucket is used to provide a drum for the cable which operates the bucket in its forward and rearward movements which is relatively small in width for two essential reasons, one being that the space on the carriage of the paver is necessarily limited and the second, and possibly greater reason being that there must be as little angular deflection of the driving cable as possible, as the vertical bights of the cable at the inner end of the boom must be centrally of or in vertical alignment with a vertical pivotal axis of the boom so that the boom may be swung either to the right or left as desired without affecting the cable. Also, a second drum is necessary for the operation of the trip (able of the bucket and this drum must also be so constructed that there is as little angular deflection of the cable as possible.

One of the present objects, therefore, of the present invention is to provide a boom and bucket wherein one cable is used for moving the bucket forwardly and rearwardly on the boom and to provide a special form of drum for operating this cable so that when the bucket is in its innermost position the end of the cable will be practically central of the drum, while on the other hand, when the bucket is in its outermost position, the ends of the cable will be at the opposite ends of the drum, which of course Wlll cause the greatest angularity of the cable, but the distance now between the bucket and the drum is such that the slackness in the cable is great enou h. to allow for this angularity and the cab e will keep its correct position around the drum and no slig towards the center thereof.

till another object of the present invention is to provide a second drum for the cable which trips the bucket, this drum being similar in all respects to the former drum, but of a smaller size; and in a like manner by attaching the ends of the cable to the drum as to the former mentioned drum, the maximum angularity of the cable will oc ur when the bucket is at the outer end of the boom, while the ends of the cable will be centrally of the drum when the bucket is in its innermost position.

Still another object of the invention is to provide a means of automatically closing the door of the bucket as the bucket approaches the innermost end of its travel so that by no possibility can the concrete be poured into the bucket with its doors open.

With these and other objects in view, the invention consists in certain new and novel constructions and combination of parts as will be hereinafter more fully described and pointed out in the claims.

Referring now to the drawings showing a preferred form of the invention- Fig. 1 is a view in elevation showing a portion of a paver, the boom-and bucket, together with the cables for operating the same, parts of the boom and bucket being shown in section and parts broken away for the sake of clearness.

Fig. 2 is a similar diagrammatic view of the cables and drums and the arrangements for moving and tripping the bucket.

Fig. 3 is a top plan view of the boom and bucket showing the bucket approaching the innermost end of its travel.

Fig. 4 is an enlarged top plan view of the drum and cable for operating the bucket, the sheaves for the cable, and the inner drum on the boom and its cable for tripping the bucket.

Fig. 5 is a view partly in elevation, and partly in section, of a portion of the boom and bucket, the tripping mechanism of the bucket being open and the tripping mechanism about to be automatically operated for the closing of the doors of the bucket.

Fig. 6 is a sectional view of the boom and showing the bucket in elevation, the dotted lines showing the doors in their open position.

Fig. 7 is a detailed end view of the trippirliqg mechanism, and supporting yoke.

1g. 8 is a detailed view of the sector.

As heretofore mentioned the boom and bucket are similar to that shown in my previous application with" the exception of the construction of the drums and the automatic means for tripping the bu ket when approaching its innermost position, and only that much of the boom is shown and described which is similar to the previous invention as is thought necessary to understand the parts and functions of the present invention.

Referring now to Fig. 1 there is shown a fragmentary forward portion of a paver 1, which is provided with a suitable bracket 2, on which is pivotally supported the boom 3 which is preferably formed of the two angles 4 which form a track for the carriage 5 having the rollers 6 and from which *arriage is hung the bucket 7.

This bucket is provided with the pivotal bottom doors 8 which are held in the closed position through the medium of the rods 9 whichare fastened to a plate 10 which in turn is supported by a spring retainer 11 which in turn is supported by an offset yoke 12, which offset yoke is pivoted eccentrically to the sector 13 as at 14, which sector is mounted on the shaft 15 which extends across the carriage 6. This sector 13 has a depressed rim 16 over which passes the two ends 17 and 18 of the tripping cable A, the one end of the cable 17 encircling and fastening to the lower end of the sector by. the bolt 19, and the end 18 fastening to the upper end of the sector 13 by the bolt 20. It will be seen that the end 17 of the cable (see Fig. 1) passes up over the sector and extends inwardly towards the paver and is fastened to the small drum C in a manner which will hereinafter be described. The other end of the cable 18 passes over the top of the sector and out over the sheave 21 at the end of the boom and extends rearwardly of the boom and is also fastened to the small drum C, as will be also hereinaftermore fully described.

It will be understood that the arrangement so far described is similar to the arrangement shown in my former application with the exception of the specific construction of the drum C. The operation is the same also, and as the bucket moves forwardly and rearwardly of the boom, the cable A will also wind up and pay off the drum until the pressure is applied to the drum when, the bucket continuing in its movement will be tripped through the medium of the now stationary cable A and the sector to which its ends are connected; the

opening or closing, of course, depending on the direction of travel of the bucket.

In other Words, the cable A moves with the movement of the bucket and a stopping of the cable will cause the sector to tri or sheaves 22 and under one of the two sheaves 23, mounted on the inner end of the boom, over the rollers 24 and the sheave 25 at the end of the boom and is connected to the rear end of the carriage 5 by a bolt 26. The other end of this cable D is connected to the forward end of the carriage 5 by a bolt 27 and extends inwardl under the sheave 28 and upwardly over t e sheave 22, and under the drum and is connected to an end portion thereof, as may be clearly seen in the diagrammatic view of Fig. 2. The drum D will be provided with a gear 29 which will be driven by a small pinion 30 which latter will be driven by a small motor (not shown). A part of the means are shown for revolving the boom, but this forms no part of the present invention.

The small drum 0 is provided with a space for a brakeband 31, which in turn may be operated through the arm 32, which in turn is operated by a foot lever 33 so that a pressure on the foot lever 33 will apply pressure on the brakeband 31 and to the small drum C to cause the tripping of the bucket as just described.

Located on one of the tracks or angles of the boom, there is shown an arm 34 which extends inwardly and is forked through which passes a portion of the cable A, and in fact that portion that has its end 17 fastened to the sector 13. Clamped, or otherwise secured to this portion of the cable and spaced a slight distance from the sector is thestop 35; the position of this stop being such that when it contacts with the forked arm 34, the bucket will be nearly in its innermost position and when the sector 13 is swung from the position as shown in Fig. 5,-to the position shown in Fig. 1, the bucket will have reached its innermost position and be under the spout 36 of the paver 1.

From this it will be seenthat by using the previous construction of the boom and bucket including the tripping means and by providing the fork arm, as above mentioned and the clamp correctly positioned on the Inn cable, that even though the operator should forget to apply pressure to the pedal 33 during the return of the bucket, still when the stop 35 strikes the fork, the cable will be retarded and the sector automaticall returned to its initial position which wil therefore close the doors as the bucket reaches its innermost position under the spout. In addition to this automatic means for insuring the closing the doors of the bucket, reference is now made to the manner in which the drums are formed and the manner of fastening the cables A and B to their respective drums C and D. Taki up first the drum D, it is shown as mounte on a shaft 37, and provided with a central partition 38 and with surface grooves 39 on the right hand side thereof, Ssee Fig. 4) which extend in a slightl angu ar position with respect to the centre axis of the drum, while the other half of the drum is provided with grooves 40 which also extend in an angular position, but in-an opposite direction to the grooves 39. One end of the cable B passes over the to of the drum and is fastened at a oint 41 a jacent the central artition 38 whi e the other end of the cable passes under the drum and is wound around the same and is fastened at a point 42 adjacent the one end of the drum; it being remembered that an end of the cable B which extends out over the boom and then under the same connects to the rear of the carriage 5, while another end of the cable B passes under the boom and is connected to the forward end of the carriage 5.

I have spoken of this cable B as having its ends fastened to the drum and its ends fastened to the carriage and it is to be remembered that there are in reality two parts of the cables and four ends, but they are so connected as hereinbefore described as to provide one continuous cable B.

In Fig. 4 I have shown the drum D with the cable B associated therewith and the bucket 7 would, in this instance, be at the inner end of the boom. It will be noticed that both bights of the cable B are now nearly at right angles to the central axis of the drum or in other words there is very little angularity. As the carriage 6 and the bucket 7 move outwardly to the end of the boom, the cable would pay ofi from'the one side of the drum (see Fig. 4) and take up on the far side of the drum so that when the bucket is in its outermost position the angularity of the bi hts of the cable B will 7 be at its greatest, ut the length of the cable now between the bucket and the drum is such that the slack in the cable will allow for this angularity and the cable will remain in its proper grooves. It might be mentioned that the sheaves 22 are slidingly mounted on their shaft 43 and likewise the sheaves 23 and 28 are slidingly mounted on when the bucket is in its innermost position there is ve little angularity in the bights of the cabe B and when the angularity does occur the bucket is at its outermost position at the end of theboom, and the slackness in the cable between the bucket and the drum will be great enough to overcome the ordina disadvantages of angularity which won d otherwise tend to pull the cable out of its groove.

In a like manner the drum 0 is formed, it having a central partition 44 and the grooves 45 extending in the one direction; and the grooves 46 extending in the other direction, the one end of the cable A being fastened to the upper-portion of the drum at a point 47 adjacent the central partition 44 while the other end of the cable is fastened at a int 48, it having been first passed under t e drum and wrapped around a number of turns and secured adjacent the-end of the drum as shown- In a like manner when the bucket is near'the inner end of the boom there will be but little angulamty in the cable and when the bucket is at its outer end of the boom, the angularity of the cable will not effect the operation of the drum due to the length of the cable between the drum and the bucket.

The operation of the device is as follows: assuming that the bucket is in its innermost position, the cable B will be in the position on the drum D as shown in Fig. 4, and as the drum D is revolved, the carriage and bucket will move outwardly, the cable B taking up and paying oil as heretofore described. Likewlse the cable A will take up and pay 03 on the drum C, it travellin freely with the carria e 5 until. halte When it is desired to trip the doors of the bucket, pressure will be ap lied to the footpedal 33 which will stop t e drum C from rotation and its cable A will rock the sector 13, it being remembered that the carriage 5 is still continuing in its outward movement, and the rockin of the sector forcing the pivotal point 0 support of the yoke 12 past the vertical arms of the shaft 15 will allow the opening of the doors of the bucket by the weight of material in the bucket.

When the drum 1) is revolved in the o posite direction, if pressure is again a peied to the foot-lever 33, the drum C Wlll held against rotation causing the sector 13 to assume its normal position and close the doors.

So far it will be seen that the operating of the bucket and the tripping of the doors is similar to that shown in my previous application with the exce tion of the formation of the drums and t e way the cables are attached thereto. The operation of the means and the means themselves for the automatic closing of the doors, when the bucket is approachin its innermost position, however, is di erent and assuming that the operator should for at to apply the brake to the drum C whi e the bucket is returning to its filling position, the stop 35 will contact with the forked arm 34 and as the bucket continues to travel inwardly, the cable A bein by the stop and ork, rather than by brake to the drum C, will cause the sector to rock to its normal position, thereby automatically closing the doors. In other words if the cable is stopped from movement when the bucket is travelling inwardly, either through the medium of the drum B or by the fork 34 and the stop 35, the sector 13 will be rocked, pulling the doors to their closed position.

A handle 50 is shown mounted on one end of the sector supporting shaft 15 which handle may be used for rocking the sector to'o en and close the doors of the bucket, shou d its primary mechanism for suc operation become disabled.

From the foregoing it will be. seen that I have provided a drum and cable for the driving of the bucket, and a second drum and cable wholly mounted on the boom .for the operation of. the trip and doors of the bucket, each of the drums occupyin but a minimum amount of space, which rums are so constructed as to allow for the angularity of the cablewhich is at its greatest when the bucket is in its outermost position and when there is plenty of slack in the cable.

Furthermore, I have provided an automatic means for closing the bucket doors as the bucket approaches its filling position so that even though the operator should fail to close the doors, the automatic means will come into action.

The device is one which has proved very effective in service, easily operated, and eflicient in action.

I do not claim broadly the construction of the tripping mechanism, the sector, and the arrangement of the connection of the cables to the sector, as this is claimed in the previous application of mine, as above referred to.

What I do claim, however, and desire to secure by Letters Patent is:

1. In combination with a. concrete paver having a boom and bucket, a carriage on said boom for su porting said bucket, a cable endless in orm connected to said carriage for operating the carriage and bucket in a forward and rearward direction, a horizontal positioned drum mounted on held against movement,

the paver for operating said cable, a portion.of the cable passing over the drum and a portion of the cable passing under the drum, the ends of said cable being so fastened to the drum that the greatest horizontal angularity of the inner bights of the cable wil occur when the carriage and bucket are in their outermost position on the boom.

2. In combination with a concrete paver having a boom and bucket, a carriage on said boom supporting the bucket, a cable endless in form connected to said carriage for operating the carria e and bucket in a forward and rearward direction, a horizontally positioned drum mounted on the paver for operating said cable, the said drum provided with two sets of grooves angularly positioned with relation to each other, one end of the cable being fastened'centrally of the drum, and the other end of the cable being fastened at the outer end of said drum. one end of the cable passing under the drum, the other end of the cable assing over the drum so that the inner big ts of the cable horizontally diverge and approach as the carriage and bucket move outwardly and inwardly on said boom.

3. In combination with a concrete paver having a boom and bucket, a carriage on said boom supporting the bucket, said bucket provided with doors, tripping means mounted on said carriage and connected with the doors, cable means for moving the carriage along said boom, a second cable connected with the tripping means on said carriage and a drum mounted on said boom, the inner ends of said second cable being secured to said drum so that the inner bights of the cable will horizontally diverge as the bucket and carriage travel outwardly and approach as the bucket nears the said drum and means for temporarily halting the said second cable in its movement as the carriage is propelled by the first mentioned cable to thereby operate the tripping mechanism connected to said doors.

4. In combination with a concrete paver having a boom and bucket, a carriage on said boom for supporting said bucket, a cable endless in form, connected to said carriage for operating the bucket to a forward and rearward position, a drum for operating said cable, a portion of the cable passing over the drum and a portion of the cable passing under the drum, the ends of said cable being so fastened to the drum that the greatest angularity of the inner bights of the cable will occur when the bucket is in its outermost position on the boom, tripping means carried by the carria e, a tri ping cable mounted on the boom an travel in freely with said bucket, a second drum for halting said last mentioned cable to operate the tripping means and said iii second cable also so fastened to said drum that the greatest point of angularity of the bights of the cable will occur when the bucket is at its outermost position on the boom and centrally of the drum when the bucket is in its innermost position.

5. In combination with a concrete paver having a boom" and bucket, a carriage on said boom and supporting said bucket, tripping means for the doors of said bucket mounted on said carriage, a cable connected to the front and rear of said carriage for operating the bucket in its forward and rearward movement, a drum for operating said cable. said drum having a central partition and oppositely disposed grooves on the surface of the drum, a portion of the cable passing over the drum and connected to the drum adjacent the central partition, a portion of the cable also passing under the drum, wrapped around said drum and fastened near the outer end of saiddrum so that as one part pays ofi, the other. takes up, and so that the bights of the cable are central of the drum when the bucket is in its innermost position and at the opposite sides of the drum when the bucket is in its outermost position; a second drum of similar construction mounted on the boom, and a cable similarly attached thereto, said cable being fastened to the tripping mechanism and free-running with the bucket, and means for applying pressure to said second drum for haltin the same to thereby open and close the oors as the bucket travels in its inner and outer directions.

6. In combination with a concrete paver having a boom and bucket, a carriage for supporting said bucket, tripping mechanism for the bucket on said carriage, a cable endless in form connected to said carriage for operating the carriage and bucket in a'zforward and rearward direction, a drum mounted horizontally on the paver for the operation of said cable, a portion of the cable passing over the drum and a portion of the cable passing under the drum, the ends of said cable being so fastened to the drum that the reatest horizontal angularity of the inner ights of the cable will occur when the bucket is in its outermost position on the boom, a tripping cable connected to the said tripping means and a'drum mounted on said boom for operating said cable, as the first mentioned cable operates the said carriage.

7. In combination with a concrete paver having a boom and a bucket, a carriage on said boom for supporting the bucket, tripping means for the doors of said bucket, mounted on said carriage, means for moving the carriage and bucket forwardly and rearwardly along said boom, means mounted on said boom for operating said tripping mechanism comprisin a drum and a cable endless in form, a portion of the cable being secured to the tripping mechanism and the inner ends of the cable fastened to the drum so that the greatest point of angularity of the inner bights of the cable occurs when the carriage and bucket are at their outermost portion on the boom, and the said tri .p1n mechanism operating the doors of tlie buc at when the said drum is momentarily held against rotation during the movement of the said carriage.

8. In combination with a concrete paver: havlng a boom and bucket, a carriage for supporting said bucket, tripping mechanism mounted on said carriage for operating the doors of said bucket, means for moving the carriage inwardly and outwardly on said boom, a drum mounted on said boom and a cable endless in form connected to said drum and said tripping mechanism, means for holding the drum momentarily against rotation to thereby cause the tripping mechanlsm to operate as the bucket continues in its movement and further independent trippmg means comprising a stop mounted on sa1d boom and a clam on said cable for causing said cable to ha t when the carriage approaches its innermost path of travel to thereby operate said tripping means.

9. In combination with a concrete paver hav ng a boom and bucket, independent driving and tripping mechanisms comprismg in part two cables and two drums, one cable and one drum for operating the bucket, and one cable and one drum for operating the tr1pp1ng mechanism, each of said drums havinga central partition and oppositely disposed grooves on each side of thepartlt1on, each of the cables being connected respectlvely to one end of the drum and to a point adjacent the central partition, and

a each of the cables having its ends respectively passing over and under the said drums so that when the bucket is in its outermost position, the inner bights respectively of both of said cables will be centrally of the drums and at the opposite ends of the drums when the bucket is in its outermost position.

1Q. In combination with a concrete paver hav ng a boom and bucket. independent drlv ng and tripping mechanisms comprising In part two cables and two drums, one cable and one drum for operating the bucket, and one cable and one drum for operating the tripping mechanism, each of said drums having a central partition and oppositely 1 disposed grooves on each side of the partition, each of the cables being connected respectively to one end of the drum'and to a point adjacent the central partition, and each of the cables having its ends respectively passing over and under the said drums so that when the bucket is in its outermost position, the inner bights respectively of both of said cables will be centrally of the drums and at the opposite ends of the drums when the bu lfet is in its outermost position, and a member secured to the trippirg; cable and a stop secured to the boom, sai member engaging saidstop as the bucket approaches its innermost end of travel to thereby stop the tripping cable in its movement and automatica ly operate the tripping mechanism and thereby close the doors of the bucket.

11. In combination with a concrete paver having a boom and bucket, a carriage mounted on said boom for supporting said bucket, driving and tripping mechanisms for sand bucket comprising in part two drums and two cables endless in form, one of said drums being mounted on the paver and the other of said drums being mounted on the boom, two independent cables connected respectively to said drums, one for driving said bucket and one for tripping the doors of said'bucket and both of said cables being connected respectively at their one end near the end of the drums and the other end near the center of the drums, so that when the bucket is in'its outermost position, the inner portions respectively of the cables will be at their. greatest point of angularit with respect to the drums and centre ly of the" drums when the bucket is in its innermost position, a rocking sector mounted on the carriage and means connected with the sector and the doors of'the bucket for normally holding the doors in their closed position, portions of the tripping cable connected to the upper and lower portions of said sector, means for stopping the rotation of the drum mounted on the boom to thereby rock said sector and open the doors of the posed to the sides of said central partition,

a cable endless in form, one end of the cable passing. over the drum and secured adjacent the central partition and the other end of the cable passing under the drum and looped around sa d drum and secured near one end thereof so that as the bucket approaches the paver, the inner bights of the cable adjacent the drum will approach each other and will diverge as the bucket travels in its outward movement, and a tripping means comprising in part a freely running cable, endless in form, and a drum mounted on the boom, the arrangement of the latter drum and the connections of the inner ends of'the cable with said drum being identical with the arran ement of the drum and the connection of t e innerends of the cable of the driving means.

In testimony whereof I aflix my signature.

CHARLES E. FOOTE.

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