US1377744A - Hoisting apparatus - Google Patents

Description

M. N. BAKER..

HOlSTiNG APPARATUS.

APPLICATION FILED MAR. 5, 1920.

Patnted- May 10,1921.

2 SHEETSSHEET 1.

avwawlio'a MORE/AN MBA/(ER s 3 r 6M M. N. BAKER.

HOISTING APPARATUS.

APPLICATION FILED MAR. 5. 1920- LWFJM. P te ted May 1m, 1m.

2 SHEETS-SHEi-IT 2- 2 i /7 20 1; E, .4 N20 3- is b 5' /7 9 I- /9 4 I 4 a "I Mam/AN N BAKE r2 WJi/Maoo v MORVAN ll'. BAKER, F DORCI-IESTER, NEBRASKA.

HOIS'IING APPARATUS.

Specification of Letters Patent.

Patented llllay ME, 1921.

' Application filed March 5, 1920. Serial No. 363,540.

To aZZ whom it may concern Be it known that l, lriionvAN N. BAKER, a citizen of the United States, residing at Dorchester, in Ealine county, in the State of Nebraska, have invented certain new and useful improvements in Hoisting Apparatus, and have described the same in the following specification, illustrated by the accom mnyin g drawings.

ltiy invention relates to that kind of hoistapparatus which individually comprises bucket and means for tipping the same to pour out its contents, and which is commonly used for elevating and for discharg ing from an elevated position successive quantities of water, sand, grain, ensilage, broken ore, or other disunited or liquid material. It is the main object of the invention to simplify the construction of this kind apparatus; to adapt the same to be operated by a single attendant stationed at the level where the bucket is filled; to guide the loaded bucket to its discharging position; to cause the bucket, after it has been emptied, to right itself automatically while going down to be refilled; and in general to produce a superior apparatus of the specified kind. To accomplish these objects I incorporate in my improved apparatus, as parts thereof, a bucket body having late *al trunnions normally positioned higher than its center of gravity, a swinging bail spanning the bucket body and having terminal bearings around the trunnions respectively, a pair of projecting lugs on opposite sides of the bucket body in parallelism with the truunions, suspending means, attached to the bail, for pulling up and lettin down the bucket, and an overhead two-rail track, adapted to be engaged and traveled by the lugs and trunnions when the bucket is drawn up.

In said drawings, illustrating the best manner in which 1 have contemplated applying the principles of the invention, Figure 1 is a side elevation of ahoisting apparatus which is constructed in accordance with these principles, and adapted to hoist and deliver ensilage from a silo. Fig. 2 is av front elevation of the same apparatus. Figs. 3 and t are details.

In this illustrative specimen of the in vention, the bucket body, denoted by the numeral 1, is a sheet-iron cylinder open at the top and closed at the bottom. It has the diametrically opposite trunnions 2 and 2 parallel therewith.

extending therefrom ata level slightly above its gravitational center, and the diametrically opposite trunnion-like lugs 3 and 3' similarly projecting from opposite sides of the bucket body above the trunnions and The hail of the bucket comprises a pair of convergingly bent bars 4: and 4:, which have terminal eyes encircling the trunnions respectively, and are riveted, at the middle of the bail to opposite sides of the interposed shell 5 of the sheave, or grooved pulley, 6. In order that the bucket when free may hang true in its upright position, shown in broken lines in Fig. 1, each of these bars has a backward incurvation, as at 7, for the accommodation of the radial lugs. The bucket is shown mounted in a rectangular frame comprising the front corner posts 8 and 9, which may be parts of a ooorcase of a silo, the back corner posts 10, the front and back crossbars 11, and the bar 12, which spans the crossbars 11 con trally as a simple beam at the top of the frame. To the central bar 12 is attached by the bracket 13 the rope, or chain 14, which runs in and suspends the described sheave '6 and thereby operates the bucket; while to the same bar, and directly back of the sheave, are attached by the hangers 15, the loose grooved pulleys 16 over which this rope runs either to the hand of the attendout below or to some convenient source of tension regulated by him.

For the purpose of guiding and tipping the bucket, the duplicate side rails 17 and 17 are immovably mounted in the upper part of the described frame by the rear brackets 18 and the brackets or forward extensions 19. They are positioned side by side in vertical planes that form right angles with the trunnion axis; they are spaced to admit the bucket body freely between them and to engage, through the antifriction rollers 20, the outer end portions of the described trunnions-and radial lugs; each of them has a forwardly ascending rear portion, a descending forward portion and an intermediate and higher arcuate portion; and both of them constitute an overhead track on the underside of which these rollers may run. To hold the descending lugs and their rollers to the rails 17 at the forward end of this track, bent metallic plates 21, riveted to the rails respectively, form vertical retaining channels 22, for these rollers respectively. One of these plates and channels is shown in detail in Figs. 3 and 4E. At'a convenient distance above the silo floor 23, and between the posts 8 and 9, is mounted the forwardly directed chute 24, which is positioned and adapted to avoid contact with the ascending bucket, and to hit and cooperate with the descending bucket, in the manner hereinafter described.

The attendant, standing in the silo, loads the bucket, positioned as shown in broken lines in Fig. 1. Then he pulls down the free endof the rope, and thereby hoists the bucket, bringing first the lugs and then the trunnions up to the overhead track. As he continues pulling the rope, the lugs and trunnions, with their respective rollers, travel forward on the underside of the track. This tilts the bucket forward rotatively on its trunnions and advances the same to the stopping position of partial inversion shown in full lines in Figs. 1 and 2, and pours and empties its contents onto the chute below. By relaxing the rope the attendant then lowers the bucket, which, being righted by its own weight, aided, as occasion may require, by contact between the upper end cf the chute and that part of the bucket which is hidden by the post 8 in Fi 1, descends to its original position ready to be refilled.

I claim as my invention- 1. Hoisting apparatus comprising a bucket body having trunnions and self-righting thereon, a bail spanning the bucket body and having terminal eyes wherein the trunnions may turn, a grooved pulley mounted on the bail, a rope running on the pulley, for raising and lowering the bucket, a pair of lugs projecting from the bucket body in parallelism with the trunnions, and an overhead single-course two-rail track adapted to be traveled by the trunnions and the lugs.

2. Hoisting apparatus comprisinga bucket body having trunnions and normally poised upright thereon, a bucket bail having bearings for the trunnions respectively, a grooved pulleycarried by the bail, a suspending rope running in the grooved pulley for the purpose of raising and letting down the bucket, a pair 01" lugs projecting from the bucket body in parallelism with the trunnions, a single-course tworail track adapted to be traveled simultaneously by the lugs and trunnions, and a chute at the front end of the track.

' 3. Hoisting apparatus comprising a bucket body having trunnions and normally selfrighting thereon a bucket bail having end bearings wherein the trunnions may turn, a pulley shell forming a middle part of the bail, a grooved pulley therein axially parallel with the trunnions, a suspending rope running in the grooved pulley and adapted to raise and lower the same in a vertical plane, a pair of lugs projecting from opposite sides oi? the bucket body in parallelism with the trunnions, and an overhead singlecourse two-rail track positioned to be en gaged and traveled by the lugs and trunnions when the bucket is drawn up by the suspencing rope.

l. Hoisting apparatus comprising a bucket body having trunnions and normally selfrighting thereon, a pair of projecting lugs on opposite sides of the bucket body in parallelism'with the trunnions, a bucket bail adapted to swing on the trunnions and to engage the lugs, a pulley shell forming a middle part of the bail, a grooved pulley therein normally in axial parallelism with the lugs and trunnicns, a suspending rope running in the grooved pulley and adapted to raise and let down the same in its normal plane, and an overhead two-rail track, adapted to engage the lugs and trunnions when the bucket body is drawn upward by the suspending rope, and having a forwardly ascending rear portion, a descending forward portion and an intermediate arcuate portion.

\Vitness my signature at Dorchester, Nebraska, February 27, 1920.

MORVAN N. BAKER.

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