US1007483A - Automatic dumping-elevator. - Google Patents

Description

B- T. PBIRCE.'

AUToMA-no DUMPING ELBvATon'. APPLIUHLQN FILED JULY-29,1916.

1,007,483, Patented Oct. 31, 19,11.

a SHEETV'SHET L v R. T. PEIRCE. AUTOMATIC DUMPING ELIATOR.

\ 3 SHEETS-SHEET 2.

Patented Oct. 31, 1911.

APPLICATION FILED JULY 29,1910.

' ,Z3 I 37:32am@ B.. T. PEIRCE.

AUTOMATIC DUMPING ELEVATOR.

APPLICATION FILED JULY 29,1910.

Patented 001).' 31, 1911.

3 SHEETS-SHEET 3.

me/nto@ UNITED STATES .PATENT .oEEicE ROBERT T. PEIRCE, F NEWPRT NEWS, VIRGINIA. y

AUTOMATIC DUMPING-ELEYATOR.

Specication of Letters Patent. Patented Oct. 31, 1911.

applicati@ filed July 29, 1910. serial No. 574,494..v

To all whom it may concern.'

Be it known that I, ROBERT T. PEmcE,

citizen of the United States, residing at Newport News, in the county of 'Warwick bucket or carrier is used which is automatically rotated upon its .pivot to a dumping and State of Virginia, have invented' certain new and useful Improvements in Automatic Dumping-Elevators, of which the following is a specification.

My invention relates to elevating mechanism and particularly to such hoisting mechanism in which a p ivoted dumping dumped without stopping the ascent of the carrier, thus obviating the shock and strain on the mechanism due to a complete stoppage of the hoisting carrier or bucket when it reaches the place at which it is to be dumped. p

A further object is to provide in connection with the bucket or carrier a chute which when the carrierl is lowered is automatically raised into such position that it will guide the contents of a cart into the bucket or carrier.

L further object is the. provision of a dumping bucket or carrier mountedl between vertical standards or guides which shallbej particularly suitable for elevating materials ol any kind in building construction and delivering said materials into a bin, chute or hopper, or on to the floor of the building, which mechanism shall be simple in construction, light in weight, positive in action and easily adapted to dump `.at any point.4

Broadly considered,- the invention comprises vertical gifiides between which the bucket operates, and a bucket-which is eccentrically pivoted between these guides, both with relation=t aplane cutting its vertical center and a plane cutting its horizontal center, the bucket thus remaining inLLa vertical position-either when it is load loaded, suitable means being provided, adjustably mounted upon the vertical guides whereby the bucket may be rotated upon its axis at any predetermined point.

My invention is shown in the accompanyingdrawings wherein Figure 1- is a perspective view of my elevating mechanism. Fig. 2, is a vertical sectional view showing the bucket or carrier4 raised to its dumping position. Fig. 3 is a like view but showing the bucket or carrier lowered to its receiving position. Fig. 4 is a perspective view of the bucket or carrier detached from the supporting frame. Fig.

manner of supporting the bucket.

.5 is a perspective view showing a modilied Referring to the drawings 2 designates a A base of any desired character but shownas formed of a rectangular frame composed .of

the opposite side bars 3 and the bars 4, Mounted upon the opposite sides of the frame and extending upward therefrom are the vertical standards or guides 5 which are of any desired height and which are connected at their lupper ends by the spaced cross bars 6 between `which are mounted pulleys 7 and 8, the pulley 8 being located midway between the standards or guides 5. It will be seen from Fig. l that the cross. bars 6 extend out on one side beyond the 'adjacent standard or guide 5, and that the pulley 7 is mounted between these projecting extremities of the cross bars so as to be supported beyond the outer edge of the adjacent guide 5.

Adjustably .mounted upon the guides or standards 5 arethe oppositely disposed brackets 9, one for each standard, these brackets being so mounted upon Lthe standards that they may be adjusted vertically to any-'desired position and held in their ad'-V justed position. As shown 'each of the brackets at its base is provided with a U- shaped flange 10 which embraces the c orresponding guide or standard 5 so as to securely hold the bracket in position but at' the same time to permit the bracket to be raised or lowered. The brackets 9 are connected bythe transversely extending beam 'ico or cross piece 11 which may be made of any Y suitable material and. connected to the lbrackets in any suitable manner. This cross piece 11 or beam is beveled upon its upper and outerface as at 12, and suitably supported upon the cross piece 11 1s the downward ly and outwardly inclined chute 13 having the upwardly extending side walls 14;. As shown, the cross piece or beam 11 is attached to the bracket 9 by means of bolts but any suitable manner of joining this cross piece and the bracketamay be employed. The chute v13 may of course be attached to the cross piece or to the brackets in any desired manner, as by the bolts 13.

Attached to thel inner face of the cross piece in any suitable manner are the vertically adjustable bucket engaging tripping arms 15. rlhese are angular, their upper ends projecting over and in the path of the pins or lugs 22 on the bucket. The arms 15 are spaced from each other to permit the bucket to pass between them and are disposed at opposite ends ofthe transverse cross bar 11. These members 1&5 are vertically slotted so that they may be adjustedvertically upon the cross bar for a purpose to be later described. The bucket 16 is provided with the oppositely disposed trunnions 17 which are located to one side of the middle vertical plane ot the bucket and preferably below the center of gravity. The vtrunnions are nearer to the dumping'side of the bucket than to the opposite side, thus the bucket Vwill normally retain the position shown in Figs. 1 and 3, whether the bucket be loaded or unloaded. Preferably the trunnions are disposed so low down upon the bucket that it requires but very little force to tip it, and

p yet are so disposed that the bucket-will au tomatically return to its vertical position after the load has been dumped. The bucket vis pivoted to a bail 18 forming a supporting yoke, which bail is U-shaped and extends over the bucket and down the sides thereof and is provided at its endsv with the eyes 19 through which the trunnions 17 pass. This bail is provided on each arm with a plurality of U-shaped slides 20 which engage with the inside edges of the standards 5, as shown in Figs. 1 and 4. These slides act as guides for the bucket and are of such dimensions as to -readily slide upward and downward upon the standards or guides 5 whileat the same time holding the bail from any lateral movement.

Projecting outward on each side of the bucket near thel u er end of thesame are the stop lugs 21 w ch when the bucket is in Y its vertical position contact withthebail 18 so as to prevent the bucket rotating in one direction beyond a vertical position, .thus

providn means whereby the weight contained wlthin the bucket, or the weight of the bucket itself, will normally hold it' in a vertical position.v i *D Projecting out from the sides of' the bucket near the front thereof are the o positely disposed lugs or pins 22 whichas tllie bucket is raised are engaged by the inwardly rojecting ends of the arms 215 and thus fldrm a means whereby'the bucket is tipped when.

intimes' A i it has `reached its dumping position. The bail 1.8 is attached to a flexible 'connection as for instance a wire cable 23 which passes up over the pulley 8, across and over the pulley-7 and then downward to any suitable position. It may be left free as illustrated in Fig. 1 so that it may be operated by hand,

-or the depending end of the cable may be attached to any suitable hoisting mechanism,

not shown. 75

rlhe yoperation of this portion of my invention will be obvious. As the cable 23 is `.pulled the bucket will be hoisted until a point is reached where the pins or lugs 22 engage with the inwardly projecting ends of the arms 15. As the bail moves upward, the arms 15 will act to rotate the bucket upon its trunnions and the bucket will take the position shown in Fig. 2', the end of the bucketresting'upon the beveled face of the g5 cross piece 11,the bucket-then being ina discharging position and discharging its contents upon the chute 13. At this point the pins 22 have escaped beyond vthe inwardly turned ends of the tripping arms 15 and the 90 bucket'is free to continue itsn ascent, the pins 22 bearing against the guide 5 and forming stops preventing the further inversion of the bucket. As the bucket moves downward vits `forward end contacts with the cross bar 11 and it is turned upon its'trunnions to a position where the weight of the bucket will tend to turn it into a vertical position, and it will retain this vertical position as shown in Fig. 3 ,until it reaches the bottom of the hoist. It will be seen that both in its loaded and unloaded position the bucket will normally remain vertical and, that itis rotated not by sopivot-ing the bucket that it is in unstable equilibrium and then tripping the bucket, but that it is rotated by coming in Icontact with stops mounted on the cross bar 11 and4 that it is rotated back to its vertical position by contacting with said cross bar. v

L In connection with my improved hoisting and dumping apparatus I have provided means wherebythe contents ofa cart may be guided into the bucket when the bucket' or carrier has rtached its lowered position. To this end I have mounted upon the bar 4 of the base 2 the upwardly projecting supports 25 which are formed wlth eyes at their upper ends within which, is carried the rock lshaft 26 havino o positely disposed pul? leys 27 on its en s. ounted upon this shaft 120 is a chute 28 having sides- 29 and passing over the pulleys 27 1s aviiexible connection 30 which passes downward over a pulley or through an eye31 attached to the base, then upward, then outward and over a pulley 32 attached to the standard and then downward, the ends. of the iexibleconnections being attached to a freely swinging bail 33v which depends beneath the path of travel of the bucket or carrier so that when the 130 I bucket or carrier is lowered to it-s lowest position it will engage the bail 33 and-the weight of the bucket or carrier will depress the bail, thus drawing upon the Hexible connections 30, rotating the shaft 26 and raising the chute 28 to the position shown in Fig. 3

so that a cart 34 may have its contents directed immediately into the bucket. .l/Vhen the bucket or carrier is raised as shown in Fig. 2, the weight of that portion of the chute 28 which projects beyond the rock shaft 26 will cause the chute to fall to the position shown in Fig. 2, that is to a vertical position. It will be obvious that this 115 chute 28 may be easily disconnected from the remainder of the mechanism when it is not desired to use it.. j V In Fig. 5 I show a modified form of my construction in which the elevator bucket, eccentrically pivoted as above described, is so mounted upon an ordinary elevator platform that it can be easily lifted olf and theplatform used for carrying other materials. The elevator platform is designated 35 and '25 is provided with the usual vertical shaft -slides 36 designed to engage vertical standards or guides upon which the elevator is mounted and connected at their upper ends by a cross bar 37 to which a exible connec- 3o tion 38 is attached.- The vertical members 36 are provided with the outwardly projectingbrackets 39 which are slotted as at `40 for the supporting structure-illustrated in Fig. 5. In other words that in Figs. 1 to 4 the'bail 18 forms a supporting yoke for the bucket having a cross-piece and depending legs, and in Fig.- 5 this supporting structure also consists of a cross-piece 37 and .depending legs 36. The means for dumping the bucket 42 are precisely similar to those previously described and therefore need no speciic illustration or description. The supporting members 36 of the elevator are intended to run between the guide supports 5, vand the operation of the dumping bucket is precisely the same as that previously described. lVhen the elevator has vreached a predetermined point the arms 15 on the cross bar l1 will engage the pins 44 and rotate,

the bucket upon its trunnions to dump the same. In this construction .the legs 36 extend down below the bucket and therefore the pins 44 contact with the legs 36 to act as vided for engagement with the bail or sup.

Aor shock, however, can be easily adjusted porting yoke or whether these stops engage with the vertical guides. It is sufficient that means be provided to preventY the overturning of the bucket to a position shown in Fig. 2. Upon a downward movement of the elevator the bucket will be returned to its vertical lposition as illustrated in Fig. 5.

When .it is desired to use the elevator for 'the bucket must be used. ,It will be obvious that this bucket and the supporting brackets may be attached to any ordinary elevator or platform hoist. n

It is to be noted that the modified form of my elevator is in essentials precisely rthe same form as that shown in Figs. l to 4. The supporting members 36 of the platform correspond in function tothe bail shown in Figs. .1 to.4, and these supporting meme bers 36 are guided upon the guides 5 in any suitable manner. In other words,. in the modified construction the bail carries upon it a platform. It is particularly to be notedl 10e that there'will be only a very slight jar. (if desired) when the bucket is tripped. The pins 22 strike the inwardly projecting ends of the tripping arm 15 and the bucket is gently swung over against the weight of the load until it becomes overbalanced. At this point the front face of the bucket is but very slightly above the cross bar 11 and as a consequence has but little way to fall, if the tripping arms are adjusted at a rela-v tivelylow point. If, however, theftripping arms are adjusted to their highest point the bucket will strike the cross bar with a greater shock. This is sometimes necessary where materials such asgrouting or liquid cement are being dumped from the bucket as` the jar will cause the detachment of cement or particles of grouting from the interior' face of the bucket. This matterof the jar by adjusting the tripping members 15, as above referred to. Neither will there be any jar or shock as thev bucket lifts. The face of the bucket will be supported upon the cross bar 11 as the rear end of the bucket continues its movement upward. The bucket will turn as the bail continues its movement upward until such a time as the pins or stops 22 engage with the standards 5,

as shown in Fig. 2. -This engagement occurs just as the bucket is about to leave the cross bar. rI'hus there is no shock againstthese pins 22 and no liability to bend the same, as there would be if the bucket had left the cross bar 11 before the pins 22 came in contact with the uprights 5.l

It will be seen in the position shown in Fig. 2 or any position after the bucket is dumped that upon a lowering of the bucket the front face of the `bucket first strikes the cross bar 11. rIhis holds the forward end of the bucket from any downward movement While the 'rear end moves down with the bail. As a consequence the bucket is given an easy rotative movement until a point is reached where the bucket is overbalanced and returns to a vertical position. :As the bucket becomes verticall the stops 2l engage with the bail 18, but as the bucket at this time has deposited its load and is therefore relatively light, very little shock is communicated to the lugs 2l.

It willbe seen that it is necessary that the distance between the pivotal point of the bucket and the upper-edge of the front side should e greater than the distance between the standards 5 and the cross bar 11 soy that when the bucket is turned the front end thereof k will project beyond the plane of travel. of the front face of the bucket, in other words, shall. project across the cross bar l1\so as to contact with' the same when. i

' i into the chute 2.8, and the buckets are raised and dump their contents into a' wagon'.

drawn beneath the chute 13. It'will be obvious also that the construction is capable of use in a large variety of other circumstances. j

What I claim is:

l. In an automatic dumping elevator, a supportingyoke, hoisting means connected to the yoke and a tilting carrier mounted on the yoke, the pivotal point of said carrier being below and between the center of gravity vof the carrier and the dumping side thereof, and a stop on the carrier contacting with the yoke when the carrier is in a vertical position to limit its rotative movement in one direction but permitting it to be rotated to a dumping position.

2. In an automatic dumping elevator, a

supporting yoke, hoisting means connected momes means projecting into the path of movement of the dumping side'of the carrier for enga ing the carrier as it is elevatedand rotating the same to a dumping position and engaging the carrier as it is lowered and rotating it toits vertical position.

3. In an automatic dumping elevator, a supporting yoke, hoisting means connected to the yoke, a tilting carrier pivotally mounted on the yoke, the pivotal point of said carrier being located between avertical plane cutting the center of gravity of the carrier and the dumping side thereof and below a horizontal plane cutting said center, a stop on the upper portion of the carrier vertically disposed above the pivotal axis of the carrier and engaging-the yoke to support the carrier in a vertical position but permitting a rotation of the carrier to a dumping position, and means projecting into the path of movement of said dumping side of the carrier and for engaging the carrier as it is elevated to rotate the same tofa dumping positionl but permitting' the upward. passage of the carrier above said means and engaging the carrieras it is lowered to rotateit to its vertical position.

4. In an automatic dumping elevator, a supporting yoke, hoisting means connected to the yoke, a tilting carrier in stable equilibrium pivotally mounted on the yoke, and relatively fixed means disposed in the path of travel of the dumping side of the carrier for engaging the carrier as it is elevated, rotating the carrier to a dumping position but permitting the upward passage of the carrier above said means and rotating the carrier to its vertical position as the carrier is lowered. 5. In an automatic dumping elevator, a supporting yoke, a carrier pivotally mounted on the yoke eccentric to the center of gravity of the carrier, a stop on the carrier contacting with the yoke when the carrier is in a vertical position but permitting the carrier to be rotated to a dumpingposition, a stop preventing the undue rotation of the carrier,

oppositely disposed vertical guides with' which the yoke engages, hoisting means connected to the yoke, and a tripping device supported upon the guides and engaging said carrier as the carrier moves upward to rotate the same into a dumping position but permitting the continued movement of the carrier and engaging 'said carrier as it moves downward to return it to its vertical position, said vertical the tripping device.

guides extending above moins.

6.- In.a'n automatic dumping elevator, oppositely disposed vertical guides, a supportingvyoke moving between said des and having sliding engagement therewith, a carrier, eccentrically pivoted between the arms of the yoke, hoistin means connected to the yoke, a tripping evice vertically adjustable upon the guides, said tripping device projecting into the path of movement of the carrier and acting to rotate the same to a vertical position as the carrier is raised but permitting the further upwardY movement of the carrier and engaging said carrier to return it to its vertical position upon a downward ovement of the carrier. l

7 In an au atic dumping elevator, opposed vertical guides, a supporting yoke slidingly mounted between said guides, hoisting `means connected to said yoke, a carrier eccentrically pivoted to the yoke and having oppositely dlsposed pins projecting outward from its sides, a chute adjustably mounted upon the guides, and inwardly extending oppositely disposed tripping members mdnnted at't'he entrance to the chute and projecting into the path of movement of the said pms upon the carrier whereby the ca rrier may be rotated into-a dumping position when it is lifted into engagement with the pins 8. In\an automatic dumping elevator,'op-' c positely disposed guides, a supporting yoke mounted betweeu the' guides and having sliding engagement therewith, hoistingv means attached to the yoke, a carrier bucket pivotally mounted between the arms. of the yoke and having pins projecting out rom its opposite sides, stops on the bucket engaging with the yoke to limit the rotative movement of the bucket in one direction, brackets adjustably mounted upon the guides, a chute mounted upon the brackets, and tripping members also supported by the brac ets and projecting inward into the path of movement of the ins on the-bucket, said tripping members being adapted to engage with the pins to rotate the' bucket to a dumping position but permitting `the further upward movement of thebucket and means engaging the said bucket to rotate the same to a vertical position upon a downof, and oppositely disposed angular tripping members spaced from each other a distance suiicient to permit the bucket to pass between them, the angular ends Vof the trip a ping members extending into the path of movement of the lugs on the bucket, and a bar extending between the tripping members and supporting the bucket as the bucket is rotated by engagement with the tripping members, said bar acting to returnthe bucket to its vertical position upon a downi ward movement of the bucket.

10. In an automatic dumping elevator, oppositely disposed guides, a supporting yoke mounted between the guides and slidingly engaged therewith, hoisting connected to the yoke, a bucket pivoted to means said yoke, the pivotal axis of the bucket be- 'i ing located to one side of the center of gravity of the bucket, oppositely disposed lugs projecting out from the opposite sides of the bucket near the front thereof, brackets mounted on the vertical guides, a cross bar-v connecting the'brackets, and angular members mounted on the ends of the cross bar and spaced from each other a distance slightly greater rthan the width of the bucket, the angular ends of said members being adapted to engage with tle pins on the bucket as the bucket is raised to rotate the bucket into a dumping position, said cross bar supporting the bucket when so rotated and acting to return the bucket to its original vertical position when the bucket is lowered.

Y 11. In an automatic dumping elevator, oppositely disposed vertical guides, a supporting yoke having sliding engagement with the guides, hoistlng means connected to the v yoke, a tilting carrier pivotally mounted on ice the yoke, the pivotal axis of the carrier be-y y lng eccentric to the center of gravity of the carrier, a 'stop on the side of the carrier engaging with the yoke to limit the rotation of the bucket in one direction but permitting its rotation in the opposite direction, an outwardly projecting lug on the side of the Ycarrier near the front thereof; adjustable brackets mounted upon the guides, across bar'connecting Tsaid brackets, the face of said cross bar being downwardly and outwardly beveled, a downwardly and outwardly extendingV chute attached to the cross bar, an angular tripping member ati tached to one end of the cross bar, the angular end of the member extending inward in the path of travel of the lug on the bucket and adapted to engage the lug to rotate the bucket to a` dumping position but permitting the continued upward passage of the bucket, said cross bar engaging the bucket upon its descentto rotate it into a vertical position.V

12. The combination with oppsitely disposed vertical guides and a carrier vertically movable between said guides, of a rock-shaft supported adjacent to the lower posed vertical guides and a bucket verti-l ends -of the guides and to one side of the path of travel of the carrier, a chute mounted intermediate of its ends upon said rockshaft, said ichute 'being counter-balanced at its outer end so as to hold the chute in a depending vertical position, and means connectedto said rock-shaft for rotating the rock-shaft upon the descent of the carrier to its lowermost position to bring the chute into an upwardly extending angularY position with its end projecting over the mouth of the carrier.

13. The combination with oppositely disposed vertical guides, of a bucket vertically movable between said guides, one side of said bucket being shorter than the other, a rock-shaft supported adjacent to the lower ends of the guides and to one side of the path of travel of the bucket, a chute pivotally supported upon the rock-shaftand having a counter-weighted outer end, Iand means disposed at the lower ends of said guides and in the path of movement of the bucket for rotating said rock-shaft when the bucket has fully descended to move the chute into an angular position with its end lprojecting over the shorter side of said bucket.

14. The combination with oppositely discally movable therein, of a rock shaft mounted parallel to the path of movement of the bucket but to one side thereof, a chute attached to the rock shaft and the inner end 'of said chute projecting beyond the rock shaft, means for holding the chute in a vertical position, ulleys mounted. upon the ends of the'roc shaft, flexible connections passing over said pulleys and adapted vto be wound u on the same, and a bar suspended from said) flexible connections and extending across the path of movement of the bucket ada ted to be depressed by the bucket when the ncket is lowered to rotate the rock shaft and raise the chute intoan upwardly and outwardly inclined position.

15. In an automatic dumping elevator, vertical guides, a supporting member vertically movable along said guides, a carrier 4pivoted to the supporting member for a rotative movement into a vertical or dumping position, the pivotal point of said carrier being below the center. of gravity of the carrier and between said center and the dump-,

ing side thereof, and fixed means mounted on the guides for engaging said carrier to rotate t e same toa dumping position but A permitting the carrier to move ,upward above said means and engagin with the carrier as it is lowered to rotate 1t to a vertical position.

16. In an automatic dumping elevator, vertical guides; a supportin member verti-' cally movable -between sai guides, ar carneonata rier pivoted to the supporting member for a rotative movement`r into a vertical or dumping position, the pivotal-point of said carrier being located' below the center of gravity thereof and between said center and the dumping side' of the carrier and means mounted on the guides disposed within the path of movement of the carrier for engaging said carrier to rotate the same to a dumping position but permitting the car' 75, rier to move upward above said means and engaging with the carrier as it is lowered to rotate it reversely into its vertical position.

17. In an automatic dumping elevator,

:vertical guides, a supporting member mov- 30 able between said guides, a carrier pivotally mounted upon the supporting member, the pivotal axis of said carrier being to one -side of a vertical plane cutting the center of gravity of the carrier and below a horizong5 'tal plane cutting said center of gravity, a stop engaging with the supporting member for limiting the rotation of the carrier in one direction, a projection on the carrier disposed adjacent to the front thereof, and a fixed tripping member located in the path of movement of the carrier and adapted to engage with said projection to tip the carrier to a dumpingposition as the carrier moves upward, said projection when the carrier is tipped to a dumping position engaging with the supporting memberto form a stop preventing the further rotation of the` carrier.

18. In an automatic dumping elevator, oppositely disposed vertical guides,'a supporting member vertically movable between said guides, a carrier pivoted to the supporting member for rotative movement, the pivotal axis of the lcarrier being disposed be-i low and to one side of the center of gravity of the carrier, a stop projecting out from the carrier adapted `to engage the supporting memberv to normally hold the carrier` in a vertical position, a projection on the carrier; located, near the front of the same, a transversely extending bar supported adjacent to the path of travel of the carrier but notl in said path, a tri ping member mounted on said transverse ar and projecting intox the path of movement of the projection on the carrier and adapted to trip the carrier as the carrier moves upward, said bar acting to return the carrier to its normal position as it moves downward after being 120 tripped, the projection on the carrier acting as a stop limiting the rotative lmovement of the carrier.

19. In an automatic dumping elevator, a supportingyoke, hoisting means connected to the yoke, a carrier pivotally mounted on the yoke, the pivotal point of said carrier being on one side of a vertical plane cutting the center of gravity of the carrier and toward'the dumping side of the carrier, and 130 a stop on the carrier, between the dumping side and said vertical plane, contacting with theyoke when the bucket is in a vertical position to limit its rotative movement in one direction and hold the carrier in a vertical position but permitting the carrier to be rotated toward the dumping side to a dumping position.

20. In an automatic dumping elevator, av

.stop on the carrier contacting with the yoke when the' carrier is in a vertical position to limit its rotative movement in one direction but permitting it to be rotated to a dumping position, a stop on the carrier preventing the completeinversion thereof,` and a tripping membcr disposed adjacent to the dumping side of the carrier and engaging the inverted carrier as it moves downward to return it to a vertical position.

21. In an automatic dumping elevator, a bail, hoisting means connected to the bail, a tilting carrier pivotally mounted on the bail, the pivotal point of said carrier being located between avertical plane cutting the center of gravity of the carrier and the dumping side ofthe carrier, a stop on the upper portion of the carrier vertically disposed above the pivotal axis thereof and engaging the bail-supporting carrier in a vertical position but permittinga rotation of the carrier in' one direction to a dumping position, a transversely extending bar mounted to one side of the path of travel of the carrier and having tripping members projecting to points on' either side of the path of travel, and lugs projecting Afrom the carrier adapted to be engaged by said tripping ingers as the carrier moves upward to invert the carrier, said lugs limiting the dumping movement of the carrier.

22. In an automatic dumping elevator,

bail, a carrier pivotally mounted on the.

bail eccentric to the center of gravity of the carrier, a stopy on the carrier engaglng with the bail when the carrier is in a vertical position but ermitting a rotation of the carrier to a umping position, ho1st1ng means connected to the bail, lugs projecting later-z RQBERT T. ruimen.` [1.. 8.]

Witnesses:

FREDERIC B. WRIGHT, l W. N. WooDsoN.

Images