US1713365A - Shaft and elevator construction for handling material - Google Patents

Description

May 14 l929 y R. BEGlcH ETAL 1,713,365

SHAFT AND ELEVATOR CONSTRUCTION FOR HANDLING MATERIAL Filed Jan. 19, 1928 7 Sheets-Sheet 1 Z7"` 6 7f` :A .v' 9

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SHAFT AND ELEVATOR CONSTRUCTION FOR HANDLING MATERIALv Filed Jan. 19, 1928 f7 Sheets-Sheet 3 May 14, 1929.

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SHAFT AND ELEVATOR CONSTRUCTION FOR HANDLING MATERIAL Filed Jan. 19, 1928 7 SheetsvSheet 7 70'/ l l i fww A TTORNEYS Patented May 14, 1929.4

PATENT OFFICE.y

ROBERT BEGICH AND GEORGE .'I'AXOIPEC, OF CHICAGO, ILLINOIS.

SHAFT AND ELEVATOR CONSTRUCTION FOR HANDLING MATERIAL.

Application led January 19, 1928. Serial No. 247,990.

This invention relates to certain new and useful improvements in a shaft and elevator construction for handling material. L

The primary object of the invention is to provide a shaft and elevator construction for handling material and is intended for various uses as in excavation work or mining for elevating material lto a point of discharge.

A further object of the invention is to provide of shaft and elevator construction for handling material in which the elevator for raising the material effects o eration of a pivotally mounted chute into w ich the elevator dumps the material for lateral discharge, trap doors in the shaft adjacent the ground line being-'operatively connected to the chute for shifting movement to closed position when the chute is disposed to receive the charge from the lelevator to prevent the material from falling downwardly in the shaft. A still further object oflthe invention is to provide in apparatus of the above type, a locking device for the elevator when in dumping position, the locking device automatically releasable upon upward movement of the elevator followmg lts 4 dumping operation.

characters With the above and other ob'ects in view that will become apparent as t e nature of the invention is better understood, the same consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed. p v l In the drawings, wherein like reference indicate corresponding parts throughout the several views,

Figure 1 is a side elevational view, partly broken away 'of a shaft and elevator construction-for handling material, a stationary engine being fragmentarily illustrated and having a cable connection-with the elevator;

Figure 2 is a side elevational view of the shaft construction showing the shiftable discharge chute ostioned outwardly of the runway of the s aftand with the elevator adjacent the ground line of the shaft with the trap door for the shaft in open position;

Figure 3 is a side elevational view, similar to Figure 2,' showing the discharge chute shifted into the runway of the shaft and the elevator disposed above the chute in dum ing positionwith the trap doors for tge shaft closed;

Figure 4 is a fragmentary elevational view of an indicatordevice associated with the hoisting mechanism for determining the position of the elevator in the shaft;

Figure 5 is a detail sectional view taken on line 5 5 of Figure 4;

Figure 6 is a vertical sectional view taken on line 6-6 of Figure 1 showing the elevator at the upper end of the shaft with one of the parts carried thereby engaged with an operating member for the discharge chute, with the chute shifted outwardly of the runway of the shaft;

Figure 7 is a detail sectional view, similar to Figure 6 showing the elevator. supported in the shaft against descendin movement and the discharge chute shifted into the runway of the shaft beneath the elevator, the bottom doors of the elevator being illustrated in dotted lines in open position;

Figure 8 is an enlarged detail sectional view taken on line 8-8 of Figure 3 showing the elevator disposed above the dischar e chute and locked to the guard rails for te elevator; A

Figure 9 is a sectional view similar to Figure 8 showing the bottom doors of the elevator in open position;

Figure 10 is a horizontal sectional view taken on line 101O of Figure 8; and

Figure 11 is a horizontal sectional view taken on line 11-11 of Figure 3. i

As show-11 in Figures 1 to v3, the invention would relate to a shaft and elevator construction for the handling of material comprises a shaft structure designated by the reference numeral 1 in which an elevator 2 is ver. tically movable, the shaft 1 and elevator 2 having cable and pulley devices associated therewith that extend to a stationary en ne A 3 for operating the elevator. The sha 1 has a discharge -chute 4 shiftably mounted thereon, normally assuming a position outwardly of the runway of the shaft and to be shifted into the runway of the shaft to receive the. contents of the elevator for lateral discharge thereof as shown in Fi re 3, the discharge chute 'being automatica y operated by devices arranged Iin the path of movement ofthe elevator while locking devices 5 carried by the elevator are engageable with the shaft for holding the elevator against movement during a dumping operation. The details of construction and the complete operation o the shaft and elevator oon- CII bottom closure doors of the hoist bucket 11 struction will be clearly set forth in the tollowing s ecic description.

The sliaft 1 comprises a base plate or ground platform 6 upon which the upper structure of the shaft that comprises the corner post 7 is mounted, the corner post being connected by suitably spaced cross braces 8, the cross braces at the extreme upper end of the shaft supporting a. cross beam 9. rlhe opposite sides ot the shaft 1 at the ends of the cross beam 9 have guide rails 10 that extend from the upper end ot the shaft downwardly below the ground line to the desired depth to act as a guide for the elevator 2.

The elevator 2 comprises a hoist bucket 11 that is open at its upper side with the lower end thereof closed by doors 12 hinged thereto as at 13, the doors being normally retained in closed position by devices to be presently described. The elevator or hoist bucket 11 is carried b an inverted U-shaped :trame comprising si e bars 14 and a cross head bar 15, the side 'bars 14 being grooved at their outer sides 'for sliding engagement with the guide rails 10. As shown more clearly in Figures 8 and 9, the bottom clo- -surev doors 12 for the hoist bucket 11 are hinged at their outer edges to opposite side wal s of `the bucket while the meeting edges of the bottom closure doors at 10 carry outwardly directed pins 16 that have flexible connections 17 that extend upwardly through passages formed in the side bars 111 for attachment as at 18 to the lcross bar 19 that is movably mounted atl its end in grooves formed in the inner faces of the side bars 14 between the upper end of the hoist bucket 11 and the upper cross bar 15 ofthe inverted U-shaped frame. When the cross bar 19 is lowered as shown in Figure 9 to occupy a position adjacent the upper end of the hoist bucket 11 as shown in Figure 9, the flexible connections 17 are lowered to permit the bottom closure doors 12 of the hoist bucket to open. When the cross bar 19 is raised as shown in Figure 8 to occupy a position adjacent the upper cross bar 15, the

lcross beam 9 as shown in Fi ure 1, the cable travelling in a downward direction from its anchored end 21 through anropening 22 in the cross bar 15 to enclose the pulley 23 journaled in an opening formed in the vertically shiftable cross bar 19 and then upwardly and kover the pulleys 24 and 25 at the u perl end of the shaft 1. The cable 20 exten s downwardly from the ulley 25 at the outer side of the shaft 1 and) asses around the pulley 26 that is fixed to t e shaft 27 with the end thereof secured to the drum 28 of the stamisses tionary engine 3. 1t will therefore be seen that when the cable 2() is wound on the drum 28, the cross bar 19 will be moved upwardly in a direction toward the cross bar 9 ot the elevator to close the bottom doors 12 ot the hoist bucket. Devices are provided and are adapted to be moved into the path of depending movement ot the hoist 4bucket 'for arresting such movement whereby the weight of the contents of the hoist bucket will automatically open the bottom doors 12 and low-- er the cross bar 19 away trom the cross bar 15, the separation of the cross bars rendering safety lock devices operative tor the elevator to prevent accidental descent of the elevator during a dumping operation.

rlhe locking devicest'or holding the elcvator or hoist bucket against movement during a dumping operation are shown more clearly in Figures 8 to 10 and comprise a looking device at each end of the cross bar 15 that is engageable with the adjacent side guide rails 10. A bracket 29 projecting upwardly from each end of the cross bar 15 pivotally supports a lever 30, one end of which is biturcated and toothed as at 31 for gripping the adjacentside guide rail 10, while the other end thereof has a link connection 32 with the lever 33 that is pivotally mounted in a slot in the cross bar 15 with one end of the lever 33 normally projecting beneath the cross bar 15 under the influence of the spring devices 34C interposed between the cross bar 15 and the inner ends of the lever 30. When the cross bar 19 is in its raised position as shown in Figure 8, the same enga es the levers 33 to move the levers 30 upon t eir pivotal mounting -or disengaging thev` toothed end 31 from the side guide rails 10. When the cross bar 19 is lowered as shown in Figure 9, the spring devices 34 exert a force on the inner end of the levers 30 to lower the toothed end 31 ot the levers 30 and move themJinto engagement with the side guide rails 10. ln this manner, the elevator or hoist bucket is locked in the shaft 1 against movement during its dum ing operation. `When the cross bar 19 is raised by the cable 20 tol a position adjacent the cross bar 15, the levers 33 are operated for moving the levers 30 against the tension of the spring'devices 34, this movement of the levers 30 disengages the toothed ends 31 of the side guide rails 10. Upward movement of the cross bar 19 causes the ilexible connections 17 between said cross bar and the bottom closure doors to move the doors 12 upwardly to closed position, a further pull on`the cable 20 moving the U- shaped frame comprising cross bar 15 and the hoist bucket in an uiward direction.

In addition to the locking devices for the elevator or hoist bucket that are carried by the cross bar 15 of the inverted U-shaped frame that carries the elevator, there is propositions illustrated in Figure 6 that are,

disposed outwardly of the path of movement of the elevator or hoist bucket and said supporting bars are adapted to be moved upon end bearings 36 to dispose the ledges 37 in the depending path of movement of the side blocks 38 upon the hoist bucket. The mechanism for moving the supporting bars 35 is shown more clearly in Figures 2, 3 and 10 and com rises a vertically shiftable rod 39 mova le through openings formed in cross bars 8 at one side ofthe shaft structure 1, the upper end of the rod 39 being longitudinally slotted as at 40 for the reception of the pin 41 that pivotally connects adjacent ends of the links 42 that have their upper ends pivotally connected as at 43 to the supporting bars 35.

The vertically shiftable rod 39 is operatively engaged with a pair of tra doors 44 that are pivotally mounted at t eir outer edges as at 45 upon cross bars 8 adjacent the ground platform 6 to be operated for opening the doors to permit descending movement of the hoist bucket to a point below the ground line and further operating to close the trap doors during a dumping operation of the hoist bucket. The lower end of the rod 39 has the'adjace'nt ends of a pair of links 46 pivotally connected thereto as. at 47 while the other ends of the links are attached as at 48 to the trap doors 44 adjacent their swinging edges. ance weights 49 are associated with the trap doors 44 to aid the operating rod 39 in opening the doors.

The mechanism for operating the rod 39 comprises devices associated with the chute 4 and said devices are operated by the. elevator or hoist bucket. The chute 4 comprises a bottom wall 50 and side walls 51, the forward edge of the bottom wall 50 of the chute being hingedl mounted as at 52 upon a cross `ar 8. other end of the chute includes link and lever devices connecting the same to a shaft clearly supported outwardly of the elevator shaft' 1. As shown. in Figures 2, 3, a

pair'of blocks 53 are carried by the shaft 1 on the corner posts 7 thereof above the 'hinged mounting 52 for the chute and ro-` tatably supports a shaft 54. A bell crank Counter-balhe support for the lever is fixed to one end of the shaft 54 and has one leg 55 thereof directed toward the chute 4 and connected thereto by the link 56 that is pivoted to the adjacent side wall 51 of the casing. An arm 55a fixed at one of its `ends to the other end of the shaft 54 has a linkconnection with the other side wall of the chute. When the shaft is rotated, the chute is caused to swingupon its hinged `mounting 52 to be disposed either outwardly of the runway lof the elevator shaft 1 or within the runway, and when disposed within the runway, the transverse -bar 57 carried by the bottom 50 of the chute has the projecting ends thereof moved into engagement with the side guide rails 10 to supportthehute in discharging position as shown in Figure 7. The outer end of thel shaft 54 adjacent the arm 55a has another arm 58 fixed thereto with the projecting end thereof pivotally connected to one end of a rack bar 59, the rack bar being normally inluenced downwardly by the spring 60 into engagement with the toothed wheel 61 that in turn meshes with the rack bar 62 carried by the operating rod 39, this mechanism comprising the operating means for the rod 39, previously referred to. The other leg 63 of the bell crank lever that is fixed upon the shaft 54 has a link rod connection 64 with the lever 65 that is pivotally mounted as at 66 upon the adjacent side -guide rails.

10 at the upper end thereof in proximity of the cross beam 9, the lever 65 being moved upon its pivotal mounting 66 by a device carried by the hoist bucket for shifting the discharge chute and operating the rod 39 which in turn brings the supporting bar 35 in position to support the hoist bucket and operate the trap doors 44.

As shown in Figures 8 to 10, one side bar 14;'of the inverted U-shaped frame that carries the elevator or hoist bucket .has arrod 67 journaled in bearings 68 carried by the rod, the lower end of the shaft 67 carrying an offset arm 69 while theu per end of the rod 67 carries a cross hea comprising side arms 70 and 71. One side wall 51 of the chute 4 has an arm 72 projecting upwardly therefrom with an inclined cam end 73 as shown in Figure 6 that is adapted to be engaged by the oifset arm 69 of the rod 67 to effect rotation of the rod at thedesired time for shifting the arms 70 and 71 comprising the head of the rod 67.

When the chute 4 is in the position shown in Figure 2, the trap doors 44 are in their open positions and the rod 39'retained 1n its upwardly shifted position by the counter-balance weights 49 as well as the rack and gearing connections between the rod 39 and the shaft 54 and when the hoist bucket is lowered by the cable 20 that is controlled by the stationary en ine 3, said bucket asses downwardly throng the shaft 1 to t e dev dental falling of the hoist bucket.

sired point below the ground level for charging. rllhe hoist bucket after being charged is then raised in the shaft 1, the rod 67 having been shifted in a manner to be presently described for disposing the arm O of the cross head of said sha-ft in a positionto engage the lever at the side of its pivot adjacent the link rod 64. Continued upward movement of the hoist bucket will cause ivotal movement of the lever 65 and operatlon of the shaft 54 for moving the chute 4 upon its hinged mounting 52 to a position within the shaft 1 and to dispose the same beneath the hoist bucket as shown in Figure 7, the chute being supported in this position by the cross bar 57 upon the bottom thereof having its ends engaged with the side ide rails 10. During inward movement of the chute 4, the rack bar 59 operates the gear of the toothed wheel 61 which in turn engages the rack 62 for lowering the operating rod 39,the lowering movement of the operating rod 39 closing the trap doors/14 and also moving the supporting rods 35 upon their eccentric mountings 36 to dispose the ledges 37 thereof in position to receive the blocks 38 carried by opposite sides of the hoist bucket 11. The trap doors 44 being closed prevent the falling of material downwardly through the shaft to a pit beneath, while the supporting bars 35 prevent acci- The stationary engine 3 is then reversed in its o eration to permit lowering movement o the hoist bucket to dispose `the side blocks 38 thereof u on the ledges 37 of the supporting bars 35. glack in the cable 20 will permit the weight of the material in the hoist bucket to automatically open the bottom closure door 12 of the hoist bucket and in so doing, will lower the cross bar 19 away from the cross bar 15, which will permit the tensioned levers associated with the cross bar 15 to be operated and moved into clamping engagement with the side ide rails 10 for positively locking the holst bucket against movement. When the hoist bucket is lowered into supporting engagement with the bars 35, the offset arms 69 upon the lower end of the shaft 67 engages the cam end 73 of the arm 72 upon the chute 4 for shifting the shaft and also the cross head at the upper end thereof to dispose the arm 71 of the cross head in a position to engage the inner end of the lever 65 upon subsequent upward movement of the hoist bucket which will operate the arm lever 65 for -moving' the shaft 54 to displace the chute 4 laterally of the shaft, this movement also operating the rod 35 to elevate the same .for opening the trap doors 44 and laterally displacing the supporting bars 35 out of the path of descending movement of the hoist bucket. During the downward movement of the hoist bucket, the arm 71 of the cross head of the shaft 67 maratea engages the abutment 72 carried by a cross bar 8 for shifting the cross head and shaft 67 to dispose the arm 70 of the cross head in a position to engage the outer .end of the lever 65 upon the following upward movement of the hoist bucket.

Devices are associa-ted with the shaft 27 that carries a pulley 26 over which the hoisting cable 2O passes, for indicating the exact position of the hoist bucket in the vshaft and are shown more clearly in Figures 4, 5 and 11. The shaft 27 has a belt and pulley connection 73 with the worm shaft 74 of an indicator that comprises a dial 75 and an indicator finger 76, l,the dial having numbers thereon indicative of differential elevations in the shaft. Y

From'thc above detail description of the invention, it is believed that the construction and operation of the invention will be fully understood, and while there is herein shown and described the preferred embodiment of the invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

What we claim as new is 1. In a shaft and elevator construction for handling material, a shaft, an elevator comprising a hoist bucket movable in the shaft, a pair of trap doors in the shaft, a chute hinged to the shaft, operative devices connecting the chute and trap doors, and cooperating devices carried by the chute and hoist bucket for operating the chute and trap doors for moving them into and out of operative positions.

2. In a shaft and elevator construction for handling material, a shaft, an elevator comprising a hoist bucket movable in the shaft, a pair of trap doors in the shaft, a chute hinged to the shaft, operative devices connecting the chute and trap doors, cooperating devices carried by the chute and hoist bucket for operating the chute and trap doors formoving them into and out of operative positions, and means operated by the chute and trap door connecting means to be moved into a osition to receive and support the hoist ucket during a dumping operation.

3. In a shaft and elevator construction for handling material, a shaft, an elevator comprising a hoist bucket movable in the shaftfa pair of trap doors in the shaft, a chute hinged to the shaft, operative devices connecting the chute and trap doors, cooperating devices carried by the chute and hoist bucket for operating Vthe chute and trap doors for moving them into and out of operative positions, and means forlocking the hoist bucket against movement.

4. In a shaft and elevator constructionfor handling material, a shaft, an elevator comprieing a hoist bucket .movable in the shaft,

a pair of trap doors in the shaft, a chute 'hinged to the shaft, operative devices connecting the chute and trap doors, and cooperating devices carried by the chute and hoist bucket for operating the chute and trap doors for moving them into and out of operative positions, guide rail in the chute for the hoist bucketl and the chute being moved into supporting engagement with the rails when in discharging position.

5. In a shaft and elevator construction for handling material, a shaft, an elevator coinprising a hoist bucket movable in the shaft, a chute hinged to the shaft and normally occupying a position outwardly of the runway, cooperating devices carried by chute and hoist bucket for moving the chute into and out of operative position and cooperating devices carried by the bucket and shaft vrendered operative when the chute f moves into the shaft for supporting the the chute, a lever bucket while in dumping position. l

6. In a shaft and elevator constructionfor handling material, a shaft, an elevator comprising a hoist bucket movable in the shaft, a chute hinged to the shaft and normally occupying a position outwardly of the runway, cooperating devices carried by the chute and hoist bucket for moving the chute into and out of operative position, said `cooperating devices including a journalled s aft having link and lbar connections with ivoted on the elevator shaft, connections between the journalled shaft and lever, an arm on the hoist bucket to operate the lever for moving the chute and cooperatin 'devices carried by the bucket and sha rendered o erative when the chute moves into the sha t for supportin the bucket while Ain dumping position.

g. In a shaft and elevator construction for I handling material, a shaft, an elevator comprising ahoist bucket movable in the shaft', a chute hinged to the shaft and normally occupying a position outwardly of the runway cooperating devices carried by the chute and hoist bucket for moving the chute into and out of operative position, said cooperating devices including a journalled shaft having link and bar connections with the chute, a lever ivoted on the elevator shaft, connections etween the journalled shaft and lever, and an arm on the hoist bucket to operate the lever for movin the chute, the arm on the hoist bucket movable to engage opposite ends of the lever for moving the chute in opposite directions.

8. In a shaft and elevator construction for handling material, a shaft, an elevator comprising a hoist bucket movable in the shaft, a chute hinged to the shaft and normally occupying a position outwardly of the runway, cooperating devices carried by the chute and hoist bucket for moving the chute into and out of operative position, said .oo-

the

` shaft, connectionsv ing operating devices including a journalled shaft having link and bar connections with -the chute, a lever ivoted on the elevator shaft, connections etween the journalled shaft and lever, an arm on the hoist bucket to operate the lever for movin the chute, the arm on the hoist bucket being movable to engage opposite ends of thelever for moving the chute in opposite directions, and lmeans onA the chute and elevator shaft to be engaged by the arm for setting the arm in position to engage the proper end of the ever.

9. In a shaft and elevator construction for handling material, a shaft, an elevator comprising a hoist bucket movable in the shaft, a chute hinged to ,the shaft and normally occupying a position outwardly of the runway, cooperating devices carried by the chute and hoist bucket for moving the rchute into and out of operative position, said cooperating devices including a journalled shaft having link and bar connections with the chute, a lever pivoted on the elevator shaft, .connections between the journalled shaft and lever, an arm on the hoist bucket to operate the lever for moving the chute, a pair of trap doors for the elevator shaft when the hoist bucket is in dumping position, and operative connections between the trap doors and 'ournalled shaft.

10. In a sha t and elevator construction for handling material, a shaft, an elevator comprisin a hoist bucket movable in the shaft, a c ute hinged to the shaft and normally occupying a position outwardly of the run-way, cooperatin devices carried by the chute and hoist buc et for moving the chute into and out of operative position, said cooperating devices including a journalled shaft having link and bar connections with the chute, a llever ivoted on the elevator tween the journalled shaft and lever, an arm on the hoist bucket to operate the lever for movin the chute, the arm on the hoist bucket being movable to englage opposite\ends of the lever for mov- .t

ing t e chute in op of tra doors for t e elevator shaft the hoist bucket is in dumping operative connections between t and journalled shaft.

11. In a shaft and elevator construction for handling material, a shaft, an elevator comfprising -a hoist bucket movable in the sha t mallyoccupying a position outwardl of the run-way, coo erating devices carri by the chute and hoist bucket for moving the chute into and out of operative position, said co`- operating devices including aV journalled shaft having link and bar connections with the chute, a lever ivoted onthe elevator shaft, connections tween the journalled shaft and lever, an arm on the hoist bucket when ition and e trap doors site directions a pair f a chute hinged to the shaft and norto operate the lever for movin the chute,

the arm on the hoist bucket being movable to engage opposite ends of the lever for moving the chute in opposite directions, means on the chute and elevator shaft to be engaged by the arm for setting the arm in position to engage the proper end of the lever, a pair of trap doors for the elevator shaft when the hoist bucket is in dumping position and operative connections between the trap doors and journalled shaft.

l2. In a shaft and elevator construction for handling material, a shaft, an elevator comprising a hoist bucket movable in the shaft, a chute hinged to the shaft and normally occupying a position outwardly of the run-way, cooperating devices carried by the chute and hoist bucket for moving the chute into and out of operative position, said cooperating devices including a journaled shaft having link and bar connections with the chute, a lever pivoted on the elevator shaft, connections between the journalled shaft and lever, an arm on the hoist 'bucket to operate the lever for moving the chute, the arm on the hoist bucket being movable to engage opposite ends of the lever for moving the chute in opposite directions, a pair of trap doors for the elevator shaft when the hoist bucket is in dumping position, operative connections between the trap doors and journalled shaft, including a vertically shiftable rod, link connections between the lower end of the rod and trap doors, and rack and gear connections between the upper end of the rod and the j ournalled shaft.

13.. In a shaft and elevator construction for handling material, a shaft, an elevator comprising a hoist bucket movable in the shaft, a chute hinged to the shaft and normally occupying a position outwardly of the run-way, cooperating devices carried by the chute and hoist bucket for moving the chute into and out of operative position, said cooperating devices. including a journalled shaft having link and bar connections with the chute, a lever pivoted on the elevator shaft, connections between the journalled shaft and lever, an arm on the hoist bucket to operate the lever for moving the chute, the arm on the hoist bucket being movable to engage opposite ends of the lever for moving the chute in opposite directions, means on the chute and elevator shaft to be engaged by the arm for setting the arm in position to engage the proper end of the lever, a pair of trap doors forthe elevator shaft when the hoist bucket is in dumping position and operative connections between the trap doors and journalled shaft, including a vertically shiftable rod, link connections between the lower end of the rod and trap doors, and

lrack and gear connections between the upper.

end of the rod and the journalled shaft.

14. In a shaft and elevator construction misses for handling material, a shaft, an elevator comprising a hoist bucket movable in the shaft, a pair of trap doors in the shaft, a chute hinged to the shaft, operative devices connecting the chute and trap doors, cooperating devices carried by the chute and hoist bucket for operating the chute and trap doors for moving them into and out of operative positions, said hoist bucket comprising a body and an inverted lll-,shaped frame carried thereby, a cross bar slidable in the side bars of the frame, a hoist cable for the bucket associated with the slidable cross bar "and normally positioning the cross bar adjacent they upper end of the frame, guide rails for the hoist bucket, and tcnsioncd locking devices for the hoist'bucket carried thereby and adapted to be engaged with the guide rails when the cross bar is lowered and the .hoist bucket is in dumping position.

connecting the chute and trap doors, cooperating devices carried by the chute and hoist bucket for operating the chute and trap doors for moving them into and out of operative position, means operated by the chute and trap door connecting means to be moved into a position to receive and support the hoist bucket during a dumping operation, said hoist bucket comprising a body and an inverted U-shaped frame carried thereby, a cross bar slidable in the' side bars of the frame, a hoist cable for the bucket associated with the slidable cross bar and normally positioning the cross bar adjacent the upper end of the frame, guide rails for the hoist bucket, and tensioned locking devices for the hoist bucket carried thereby and adapted to be engaged with the guide rails when the cross bar is lowered and the hoist bucket is in dumping osition.

16. In a s aft and elevator construction for handling material, a shaft, an elevator comprising a hoist bucket movable in the shaft, a pair of trap doors in the shaft, a chute hinged to the shaft, operative devices connecting the chute and trap doors, cooperating devices carried by the chute and hoist bucket for operating the chute and trap doors for moving them into and out of operative positions, said hoist bucket comprising a body and an inverted U-shaped frame carried thereby, a cross bar slidable in the side bars of the frame, a hoist cable for the bucket associated with the slidable cross bar and normally positioning the cross bar ad- 'acent the'upper end of the frame, hinged ottom doors for the hoist bucket havlng flexible connections with the slidable cross bar and 'closed when the cross bar is at its limit of upward movement engaged with the head of the frame and opened when the cross bar is lowered and the hoist bucket is in dumping position, and means for holding the hoist bucket against movement rendered operative during dumping operation of the hoist bucket. f

17. In a shaft and elevator construction for handling material, a shaft, an elevator comprising a hoist bucket movable in the shaft,a pair of trap doors in the shaft, a chute hinged to the shaft, operative devices connecting the chute and trap doors, cooperating devicescarried by the chute and hoist bucket for operating the chute and trap doors for moving theminto and out of o'perative position, means operated by the chute and trap door connecting means to be moved into a position to receive and support the hoist bucket during a dumping operation, said hoist bucket comprising a body and an inverted U-shaped frame carried thereby, a

'cross bar slidable in the side bars of the frame, a hoist cable for the bucket associated With the slidable cross bar and normally posihoist bucket having flexible connections with the slidable cross bar and closed when. the cross bar is at its limit of u war'd movement engaged with the head o the frame and opened when the cross bar is lowered and the hoist bucket is in dumping position, and means for'holding the hoist bucket against movement rendered operative during dumping operation of the hoist bucket.

18. In a shaft and elevator construction for handling material, a shaft, an elevator comprising a hoist bucket movable in the shaft, a chute hinged to the shaft, operating devices for the chute comprising a lever pivoted on the shaft and an arm on the hoist bucket to engage and operate the lever for moving the chute into and out of operative positions, the arm being pivotally mounted on the hoist bucket, and means on the shaft and chute to engage and move the arm on its pivot to cause engagement of the arm with the desired end of the level` for the proper movement of the chute.

In testimony whereof we aiiix our signatures.

ROBERT BEGICH. GEORGE JAKOPEC.

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