US1254997A

US1254997A - Hoisting and dumping apparatus.

Info

Publication number: US1254997A
Application number: US12810916A
Authority: US
Inventors: Lucien Eaton
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-10-27
Filing date: 1916-10-27
Publication date: 1918-01-29
Anticipated expiration: 1935-01-29

Description

L. EATON.

HOISTING AND DUMPING APPARATUS.

APPLICATION FILED OCT. 27, I916.

Patented Jan. 29, 1918.

2 SHEETS-SHEET I.

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L. EATON.

HOISTING AND DUMPiNG APPARATUS.

APPLICATION mmocr. 27. 1916.

1,25%,997, Patented Jan.29, 1918.

2 SHEETS-SHEET 2- LUCIEN EATON, 0F ISHPEMING, MICHIGAN. k

HOISTING AND D UMPIN'G APPARATUS.

Specification of Letters Patent.

Patented- Jan. 29,1918.

Application filed October 27, 1916. Serial No. 128,109.

and DumpingApparatus, of which the following is a specification.

The invention relates to hoisting and dumping apparatus for elevating and discharging material, and particularly for elevating and discharging rock or ore from mine shafts and the like. The invention seeks to provide an improved bucket and dumping *means therefor which can be safely, easily and rapidly operated, and the invention consists in the features of improvement hereinafter set forth, illustrated in the preferred form in the accompanying drawings and more particularly pointed out in the appended claims.

In the drawings Figure l is a View in elevation of the improved bucket and the dumping means therefor, with the frame work of the hoist shown in section. Fig. 2 is another view in elevation of the bucket and dumping means with the parts shown in section on line 2-2 of Fig. 1. Fig. 3 is a detail view illustrating the construction of one of the dump trunnions of the bucket.

The framework 10 of the hoisting anddumping apparatus maybe of any suitable construction and is provided, as usual, at its upper end, with a pulley 11 over which passes a' hoisting rope or cable 12. Oneend of the 7 cable is'connected to a winding drum (not shown) and the opposite end is connected by a clevis 13 and a series of links 14 or in any other suitable manner to the bail 15 of the bucket 16. I

The bucket is preferably substantially cylindrical, is closed at its lower end and open at its upper end. It is formed of steeland is provided at its upper edge, in the construction shown, with a strengthcnincr-strap- 17.

Bracing straps

18 and 19 exten across the bottom of the bucket and are provided with upturned ends riveted to the side walls thereof. 20 are connected to the side walls of the bucket and are provided with offset cars 21 Short vertically disposed strapsnected through the medium of the bail to the bucket at points well above and in the" vertical plane of its'center of gravity, and

for this reason the contents of the bucket cannot readily be accidentally discharged.

A dumping device is provided for the bucket, the latter and the dumping device being provided with cooperating dumping trunnions and trunnion guides or bearings which are arranged to automatically tilt and dump the bucket as the latter is lowered.

Preferably, the dump trunnions are carried 7 upon the lower portion of the bucket and the cooperating trunnion bearings upon a chute into which the contents of the bucket are discharged. In the construction shown, the dump trunnions 23 are fixed at diametrically opposite points to the side walls of the bucket 16 adjacent the bottom thereof. The trunnions extend through openings in the upturned ends of the bracing strap 18 and in the side walls of the bucket. shoulders or parts 24 on the trunnions abut against the outer faces of the straps 18 and nuts 25 on the inner ends of the trunnions secure the same in position. The outer reduced ends of the trunnions form rivet heads for securing the lower ends of guard straps Enlarged f 26 thereto. The upper inwardly oflset ends w of the guard straps preferably abut againstthe outer faces of the straps 20 andare secured to thebody of the bucket by the same rivets.

The chute into which the contents of the bucket are discharged is trough shaped and comprises a bottom 27 and sides 28. The chute is shiftable intoand out of the path I of the bucket and forthis purpose is preferably pivotally mounted to the frame work.

tion shown in full lines in Fig. 1 andin which position the chute is located in the vertical path of movement of the bucket.

As the loaded bucket is raised, the swinging chute is maintained in the vertical position shown in dotted lines in Fig. 1 out of the path of the bucket.

Suitable bumpers

31 and 32 are fixed to the frame workand limit the movement of the swinging chute. The

chute an be shifted byhand, a suitable counter-balance being provided to aid in effecting the shifting, or power operated mechanism can, if desired, be provided for this purpose.

The guides or bearing members 33 which cooperate with the dump trunnions of the bucket to tilt the latter are fixed to the side walls 28 of the chute and are preferably spaced therefrom by intermediate spacing members In the construction shown the trough-shaped chute and the bearing and spacing members 33 and 3% are formed of wooden boards and the bearing members 33 project above the side walls 28 of the chute and are provided with guide slots or bearings 35 with

parts

36 and 37 on opposite sides of the guide slots, the parts 36 being shorter than the parts 37. T the edges of the slots and the ends of the

parts

36 and 37 are covered by metal straps 38.

As the filled bucket is elevated the swinging chute is maintained in the vertical position shown in dotted lines in Fig. 1 out of the path of the bucket. The bucket hoisted to a point a little above the top of the chute and the latter is then lowered to the inclined dumping position with its upper free end resting on the stop or bumper 32 as shown in full lines in Fig. 1. In this position it should be noted that the guide slots or bearings 35 are inclined and that the adjacent side of the part 37 and the end of the part 36 of each guide member form flaring guide surfaces which aid in directing the dump trunnions 23 of the bucket into the guide slots or bearings 35 as the bucket is lowered. After the chute is placed in dumping position the bucket is lowered and turned, if necessary, to bring the trunnions in line with the slots 35. As the lowering movement is continued the trunnions move into the lower ends of the slots and the bucket tilts into the dotted position shown in Fi l to discharge its contents into the chute. The slotted bearings 35 of the bearing members 33 not only act as bearings for the dump trunnions but, because inclined, they act as cams to move the trunnions and the lower end of the bucket laterally toward the upper end of the inclined chute and out of the vertical plane of the hoisting rope and center of gravity of the bucket so that the bucket will be invariably dumped in the same predetermined direction 71. 6., in line with the chute and toward the lower end thereof. It should be noted that the dump trunnions of the bucket are below the center of gravity of the bucket and substantially in line therewith, 2'. 6., these trunnions lie substantially inthe same vertical plane with the center of gravity of the bucket and with the points of connection of the bail with the bucket. With rotate the bucket through more thana quaro avoid wear,

ter of a revolution in bringing the dump .trunnions thereof in line with the guides or bearing slots 35 of the members 33. Moreover, since the bearings are arranged to shift the lower end of the bucket laterally toward the upper end of the chute as the bucket is lowered, the latter will be invariably tilted and dumped in proper direction even though the dump trunnions are arranged in line or in the same Vertical plane with the center of gravity of the bucket, when the latter is in normal upright position.

The length of the working portions of the trunnions 23 between the guards 3G and the shoulders 24 is preferably slightly greater than the thickness of the bearing members 33. The outer faces of the shoulders Q l which are opposed to the inner face of the guide members 33 during the dumping operation, are conical. as shown and these conical faces aid in accurately centering the bucket with respect to the chute.

To prevent the material from passing over the side walls of the chute as the bucket is dumped the lower ends of the latter are preferably provided with sheet metal guards 39 which project above the edges thereof. From the swinging chute the material passes into a fixed chute 40. After the bucket is dumped it is raised above "the chute, the latter is restored to its normal vertical position and the bucket is lowered.

With the improved apparatus large heavy buckets, such as used in mine shafts, can be easily and rapidly dumped. Furthermore the chute covers the shaft during the dump ing operation and guards against the dropping of material therethrough. The bail which connects the hoisting cable to the bucket is connected to the latter at the points well above its center of gravity so that material cannot readily be accidentally discharged from the bucket during the hoisting operation. The upper portions of the guards 26 are inclined so that the projecting dump trunnions cannot be caught upon or strike against anything in the mine shaft during the hoisting operation. For these reasons the improved hoisting and dumping apparatus can be operated with great safety.

It is obvious that changes may be made in the details set forth without departure from the essentials of the invention.

1 claim as my invention 1. The combination of a bucket, hoisting devices connected to said bucket above and in line with its center of gravity, a support movable into and out of the path of said bucket, and cooperating dumping guides and trunnions mounted on said support and on said bucket at points below and in line with the center of gravity of the latter, said dumping guides having means to shift the lower end of the bucket in one direction as the latter is lowered and thereby tilt the bucket in the opposite direction, substantially as described.

2. The combination of a bucket for mine hoists and the like having a bail connected thereto above and in line with its center of gravity and dump trunnions at diametrically opposite points below and in line with its center of gravity, and guides for engaging said trunnions as the bucket is lowered, said guides having inclined cam faces to shift the lower end of the bucket in one direction and automatically tilt the bucket in the opposite direction, substantially as describe 3. The combination of a bucket, hoisting devices connected to said bucket above its center of gravity, a chute shiftable into and out of an inclined position in the path of said bucket and dumping means associated with said chute and adapted to engage said bucket below and substantially in line with its center of gravity, said dumping means being arranged to shift the lower end of said bucket toward the upper end of the in clined chute as the bucket is lowered and thereby automatically tilt the latter in line with and toward the lower end of said chute.

4. In a hoist and dump, the combination of a bucket, hoisting devices connected to said bucket above its center of gravity, a. chute shiftable into and out of an inclined position across the path of said bucket and cooperating dump guides and trunnions mounted on said chute and on said bucket below its center of gravity, guides having means to move the lower end of the bucket toward the upper end of said chute and automatically dump said bucket into and toward the lower end of said chute as said bucket is lowered.

5. The combination of a bucket, hoisting devices connected to said bucket above its center of gravity, a chute shiftable into and out of an inclined position in the path of said bucket and cooperating inclined guides and dumping trunnions mounted on said chute and on said bucket below the center of gravity thereof and arranged to automatically shift the lower end of the bucket toward the upper end of the inclined chute as the bucket is lowered and thereby tilt the bucket in line with and toward the lower end of said chute.

6. The combination of a bucket, hoisting devices connected to said bucket above its center of gravity, a chute shiftable into and out of an inclined position in the path of said bucket, cooperating dumping trunnions and bearings therefor mounted on said bucket and said chute and arranged to tilt the bucket as the latter is lowered, and conical parts on said trunnions arranged to cooperate with said guides and center the bucket relatively to said chute.

LUCIEN EATON.

Copies of this patent may he obtained for five cents each, by addressing the "Commissioner of Patents,

Washington, D. O.