US1645942A - Apparatus for elevating and distributing material - Google Patents

Description

7 J. E. BUSHNELL APPARATUS FOR ELEVATING AND DISTRIBUTING MATERIAL 2 Sheets-Sheet 1 Filed March 13, 1925 hweutoz 1,645,942 Och 1 J. E. BUSHNELL APPARATUS FOR ELEVATING AND DISTRIBUTING MATERIAL Filed March 13, 1925 2 Sheets-Sheet 2 w/A /Av/A /AY/AY/ V/ YAW gwuemtoz 33 flank/tom W .65 4 5 13 W I Patented Oct. 18, 1927.

UNITED STATES PATENT OFFICE.

JAMES E. BUSHNELL, OF NORTH PLAINFIELD, NEW JERSEY, ASSIGNOR TO RANSOME CONCRETE MACHINERY COMPANY, OF PLAINFIELD, NEW JERSEY, A CORPORATION OF NEW JERSEY.

APPARATUS FOR ELEVATING AND DISTRIBUTING MATERIAL.

Application filed March 13, 1925. Serial No. 15,211.

The present improvements relate primarily to apparatus designed for the purpose of hoisting loose material, such as freshly mixed concrete, to various elevations on a mast or tower and depositing them at such elevation in suitable chutes or other conduits so that they will travel to the point of placement by gravity, the apparatus being so constructed and arranged that the materials may be raised and chuted at successive floors or stages of a building or other construction, as the work progresses.

In apparatus of this character, the materials are usually mixed at or near the ground. and hoisted therefrom in a tub or bucket which is arranged to automatically open and dump its load at the proper height into a chute supported at that point in position to receive the contents of the bucket and convey them to the distributing conduit.

The most convenient and efiective arrangement is to have the bucket travel up one side of the mast or tower, which must be free of any obstruction tending to interrupt its travel, and to have the distributing conduit and its receiving hopper and support on the opposite side of the mast, to have the chute arranged so that it will receive the contents and convey them to the opposite side of the mast and deposit them in the hopper of the conduit. But considerable difficulty has been experienced in arranging the parts so that the bucket will be dumped at exactly the proper point in its upward path of travel and will not be damaged or cause damage to any of the other parts through overtraveling, and will return by its own gravity quickly and infallibly when released from the pull of the hoisting cable. The present 4 improvements are designed to overcome these difliculties, and accomplish other ends.

The improvements are illustrated in the accompanying drawings. in which Figure 1 is a side elevation of the hoisting bucket with a trip lever forming a part of the present improvements;

gigure 2 is a front or inside view thereof; an

Figure 3 is a side elevation of the same parts mounted on a mast or tower, on which are also mounted the trip for operating the lever. a discharge chute and a receiving hopper for the distributing conduits.

Fig. 4 is another side elevation showing the trip for operating the lever, a discharge chute and receiving hopper.

In the said drawings, 1 represents the body of the bucket, 2 and 3 the upper and lower flanged rollers on each side thereof and which engage and travel on the track 4 of the mast 5. 6 is a cable attached to the bucket and by which it is raised and permitted to lower. Any suitable means of propulsion may be employed, and the cable may be run over one or more sheaves at the upper part of the mast. 7 indicates a chute for conveying the contents of the bucket to the conduit hopper 8 pivotally supported on a bracket 9 mounted to slide on the mast. The chute is hung from a pivot 10 on the mast by means of arms 11 secured thereto, one on each side of the chute at their upper ends and extending on inclined lines into the path of the bucket, so that when the bucket passes over the end of the chute the hopper will be swung out of the path of the bucket, but will return to said path immediately by gravity. These parts are all described and shown in the copending application of John P. Faber, filed August 5, 1924, Number 730,161, upon which the present invention is in part an improvement, and to which reference may be had for further details, if desired.

A hanger 12 on each side of the bucket supports a lever 13 pivoted at 19 and having an elbow joint 14 which permits its forward arm 15 to move upwardly without moving its rearward arm 16, while the laterally projecting lug 25 coming in contact with the extension 28 of the rear arm 15 prevents such movement in a downward direction. The link 17 is pivoted to the rear end of the lever 13 and also, at its lower end to the gate 18 of the bucket, so that downward movement of the forward portion of the lever causes upward and opening movement of the door. After the lever has been depressed, and as soon as it is released, the gravity of the bucket gate 18 will restore it to normal position. The extreme forward end 20 of the lever is downwardly curved so that it will slide over the trip on its upward journey, and has an eye 21 to which a line may be attached for the purpose of manually opening the bucket at any desired point. A strap 22 is secured to each side of the bucket and extending over the forward arm of the lever guards it against lateral movement. The links 17 are in effect a bail, extending from each side to the gate 18 beneath the bucket and being rigidly secured thereto and connected with each other thereby.

The trips consist of brackets 23 detachably secured to each side of the mast and su porting a trip proper 24, in the path of t e outer arm of the lever, with a downward inclined lower part and an upwardly inclined upper part and vertically connecting portion, so that the said arm will slide thereon in ascending, be depressed, move along the same in depressed position and then be released to permit the bucket gate to close. YVhen the bucket descends the end of the arm will swing upwardly, as indicated by dotted lines in Fig. 1, on the joint 14 and pass over the trip, falling immediately to its normal position when the trip is assed.

t will be seen from the foregoing description that the bucket immediately after passing the end of the chute 7 is opened and held open for a moment by the trip 24 acting to depress the lever 13 and open its gate 18, and then closed, by the gravity of the gate, and that if the bucket continues to move upward for a short distance, no harm can be done, and further that when it returns it will pass over the trip no matter how high it has ascended. This guards against accidental injury to any of the parts by careless operation, and also ensures an accurate and smooth opening of the bucket, without danger of a rebound or any other unintended action.

The side of the bucket next to the mast is provided with spring shoes 26 preferably formed of steel straps secured to the front of the bucket extending above the same and inclined slightly away from its face and then turned backwardly and downwardly to the cable anchor 27 where they are secured to the double-angle cross bar 29. The object and purpose of these shoes is to engage the arms of the chute, and swing the chute out of the path of the bucket while sliding thereover.

The vertical surface of the trip 24 may be of any desiredlength, so that the bucket will be held open long enough to insure the discharge of its contents, and the trip may be placed at any point in the height of the tower, and adjusted with reference to the chute so as to act upon the lever 13 at exactly the right moment.

lVhat I claim is:

1. In a hoisting apparatus a mast, a bucket mounted to travel up and down said mast, a door mounted to swing upwardly to open position for opening said bucket, an arm carried by said bucket and connected $5 with said door to open the same, and a trip device secured to the mast in the path of said arm, said trip device having an inclined surface over which the end of the arm passes in ascending, and by which the said arm is moved.

2. In an apparatus as specified in claim 1, the said trip device also having a vertical portion above the said inclined portion over which the said end of the arm passes while in depressed position and which prevents the return of the arm and the closing of the door.

In an apparatus as specified in claim I, the said trip device also having a vertical portion. above the said inclined portion over which the said end of the arm passes while in depressed position and which prevents the return of the arm and the closing of the door, and said trip device also having an inclined portion above the vertical portion to permit the said arm to return to normal position.

4. In an apparatus as specified in claim 1, the said arm having a downwardly inclined end which comes in contact with the trip device.

5. In an apparatus as specified in claim 1, said trip device bein movable independently to different positions vertically on the tower.

6. An apparatus as specified in claim 1, in combination with a chute for receiving the contents of the bucket mounted on the tower adjacent to the trip device, and said trip device being adjustable with reference thereto.

7. In an apparatus as specified in claim 1, the said arm having a joint which permits it to move upwardly independently of the door but prevent independent downward movement from normal position.

8. The combination of a tower, a bucket mounted to travel up and down the same, a chute for delivering the contents of the bucket hung on a pivot on said tower and normally projecting into the path of the bucket, an inclined contact member on the portion of said chute in the path of said bucket, and a spring shoe secured to the ortion of the bucket toward the said inclined contact member and arranged to come in contact therewith when the bucket passes thereover, said spring shoe extending above the bucket and away from the said face thereof.

9. In the construction specified in claim 8, the said spring shoe having a downwardly turned upper portion spaced backwardly from the contact portion thereof and secured on the bucket.

10. In a hoisting and distributing apparatus for concrete or the like, an upright supporting member, a container for material to be distributed mounted to travel up and down said member, a door for opening and closing said container, an arm carried by said container connected with said door and operable to open the same and hold the same in open position, a trip device secured to said member in the path of a portion of said arm, said trip device extending longitudinally of the upright supporting member in the path of said portion of the arm, a chute for receiving the contents of the container when the door is opened, a swinging support mounted on the said upright member to which said chute is secured, the parts being so constructed and arranged that the container is out of engagement with the chute when the arm is in engagement with the trip, and vice versa.

11. In the mechanism specified in claim 10 the trip being constructed and arranged to be adjusted vertically on the upright supporting member independentlv of the chute.

12. In the mechanism specified in claim 10 the trip being constructed and arranged to be adjusted vertically on the upright supporting member independently of the chute and the construction and arrangement of the parts also being such that the container traveling upwardly first moves the chute out of its path, then releases it and permits it to return to normal position, and then brings the arm into contact with the trip, and on its return movement first releases the arm from the trip to cause closing of the door and then moves the chute out of its path.

Witness my hand this 10th day of March, 1925, at Plainfield, New Jersey.

JAMES E. BUSHNELL.

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