US1741960A - Apparatus for cleaning castings - Google Patents

Description

Dec. 31, 1929. w. c. sPEcK ET AL 1,741,960

AI WARATUS FOR CLEANING CASTINGS Filed June 29. 1927 e Sheets-Sheet 1 A TTORNEYS.

Dc. 31, 1929. w, c, 'sp cK ETAL 1,741,960

APPARATUS FOR CLEANING GASTINCTS 0 7M fiINVENTORS 2 ATTORNEYS.

Dec. 31, 1929. w. c. SPECK ET AL 1,741,960

H APPARATUS FOR CLEANING CASTINGS Filed June 29, 1927 6 Sheets-Sheet s Ple' 2 fl M i I ATTORNEYS.

a v w1 J Dec. 31, 1929;

w. c. SPECK ET AL.

APPARATUS FOB CLEANING CASTI'NGS Eiid June 29 1927.

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Da s], 1929.

W. C. SPECK ET AL APPARATUS FOR CLEANING CASTINGS Filed June 29. 1927 6 Sheets-Sheet 5 I IN V EN T0115 (77M M4...

- 'A TTORNEYS.

Dec. 31, 1929. w. c. sPEcK ET AL APPARATUS FOR CLEANING CASTIN 6 Shee'ts-S heet 6 Filed June 29. 1927 INV mom BY 1 M A TTORNEYS.

Patented Dec. 31, 1929 UNITED STATES nnate PATENT ori ice WILLIAM G. senor: AND EUGENE BARKER, or COLUMBUS, OHIO, ASSIGNORS TO THE BUCKEYE STEEL oAsTINGs COMPANY, or COLUMBUS, OHIO, A ooaronnrroiv or OHIO Application filed June 29,

This invention relates to apparatus for cleaning castings, it particularly relating to apparatus for removing core sand from the interior ofhollow castings of large size.

" An object of this invention is to provide vices for carrying the castings from a loading point to a place where the castings are operated upon by a power-operated hammer and from thence to a point of discharge, together with manual means for controlling thepower-operated devices.

A further object of the invention is to provide improved means for loading and suspending the castings upon a revoluble carrier and for automatically discharging the same therefrom.

A turther'object of the invention is to provide power-operated devices together with means for controlling the same for the pul' pose of rotating the revoluble car 'ier and for locking and releasing the carrier at ditlerent points in its rotation.

A further object of the invention is to pro vide means for handling the castings in an economical manner after they have been discharged from the cleaning apparatus.

Further objects of the invention will appear from the accompanying description and claims.

In the accompanying drawings:

Fig. 1 is a top plan view of an apparatus embodying the improvements.

Fig. 2 is an elevation of the forward side of the apparatus.

Fig; 3 is a vertical section of a portion of the apparatus.

Fig. 4. is a transverse section of one of the valves which controls the hoisting cylinders, together with a portion of the common operdevice for the valves in side elevation.

Fig. his a section on the line of Fig. 4;

Fig. 6 is a front elevation of a per-non of APPARATUS FOR GLEANENG CASTINGS 1827. Serial No. 202,447.

the casting suspension devices shown in Fig. 8. i

Fig. 7 is an enlarged side elevation of the lower portion of the apparatus.

Fig. 8 is a section on the line b-b of Fig. 7.

Fig. 9 is a detaii in section oi a portion of the latch for the rotatable carrier, the section being on the line a-a of Fig. 8.

Fig. 10 is an enlarged side elevation of the chute which receives the discharged castings, together with the ram associated therewith, and also showing a portion or": the carrier and one of the suspended devices associated therewith.

Fig. Fig. 10.

Fig. 12 is an elevation of the fluid pressure cylinder which operates the casting carrier.

Fig. 13 is a vertical section showing the pneumatic hammer and its support and the anvil associated therewith.

Fig. 14 is a detail in perspective of a portion of the manual control devices for the. hoisting mechanism.

A pair of parallel beams 1 constitute a support for a stationary hollow cylindrical ver 11 is a section onthe line 0-c of tical standard 2, the lower end of the standard 'being mounted upon and firmly secured to a cross plate 3 (Fig. 3) which in turn is secured to and supported by the beams. Itotatably mounted upon the standard 2 is a long sleeve 4. to the lower end of which is secured the hub 5 of an annular supporting table 5 having strengthening ribs 5"; the sleeve and table being supported on a cylindrical hollow boss formed on a bridge piece 6 riveted to the beams with ball bearings 7 preferably interposed to reduce friction. Located on the upper end of the sleeve 4 is a spider-like member consisting of an inner hub portion 8, fixed to the sleeve and having secured thereto a plurality of laterally projecting arms, each arm being formed of a pair of spaced apart parallel channel irons 9. In the present apparatus four of these arms are preferably employed, being equally spaced as shown.

Each ofithese arms, together with the table 5 carries a hoisting andsupporting mechanism for the castings constructed as follows: Located on the table 5 are four vertically-ar ranged fluid pressure cylinders 10, one for each arm, to the piston rod 11 of each of which is connected a yoke 12 carrying a rotatable sheave 13. Mounted upon the inner end of the arm 9 is a support 14 for a pair of rotatable sheaves 15 having a cover 15 and mount ed upon the outer end of the arm is a support 16 for a single sheave 17 in a cover 17. Passing about these sheaves is a cable 18 which has one end connected to the yoke 12 and the other end provided with a hook 19. A pair of bell-crank levers 20 having cooperating jaws 21 are pivoted to a crosshead consisting of a pair of spaced apart connected bars 22, with the inner ends of the levers engaged in open recesses formed on the sides of a link 23 which has an eye to receive the hook 19. \Vhen it is desired to suspend a casting from an arm of the carrier, the cable 18 of that arm islowercd by controlling the cylinder in the manner hereinafter explained, the jaws 21 engaged with the casting and the cable again hoisted, the weight of the casting swinging the jaws together so as to firmly grip the casting. Means are associated with each hoisting mechanism for releasing the jaws of the weight of the casting at the point of discharge so as to permit the discharge of the casting and to that end there is provided a pair of trip rods 24 carried by the free ends of the crank arms 25 mounted on the shaft 26 which has bearings on an inclined supporting plate 27 secured to the lower end of arms 29 suspended from the channels 9. The shaft 26 also has a crank arm 30 the free end of which is provided with a weight 31 in the form of a ball, which norinally holds the rods in retracted position. Located at the point of discharge is a curved trip bar 32 having inclined ends upon which the ball 31 rides so as to rock the shaft 26 and project the trip rods beneath the crosshea d 22. The operator then by lowering the cable by means of the fluid pressure cylinder 10 associated therewith, rests the crosshead 22 upon the rods 24, thus releasing the lovers 20 from the weight of the load of the castings. Further lowering of the cable and link 23 permits the inner ends of the levers to aproach and the jaws 21 to reccde thereby reliiasing the casting.

Control of the fluid pressure cylinder 10 is effected through a valve, the details of which are shown in Figs. 4 and 5. The casing of this valve is indicated at 33 and connected with it is an air supply pipe 35, an exhaust pipe 36, a pipe 37 communicating with the upper end of the cylinder, and a pipe 38, communicating with the lower end of the cylinder. The bore of the casing has a stationary. liner in the form of a two-part bushing 39, provided with a series of perforations to communicate with annular ports 40, 41 and 42. A cylindrical valve 43 is slidably mounted in the bushing and has annular passages 44, 45 and 46, the passage 45 being of a width capable of bridging the ports 41 and 40 or41 and42 so as to place the supply pipe 35 in communication with either of the pipes 37 or 38. Vhen the supply pipe communicates with the pipe 37 and pipe 38 is put in communication with the exhaust pipe 36 through a by-pass 47, whereas when the supply pipe 35 is put in communication with the pipe 38, the pipe 37 is put in communication with the exhaust pipe 36 directly through the openings in the bushing and the bore of the valve casing. The valve 43 has a valve stem 48 which passes through a suitable stuffing box in the end of the valve casing and is provided with a ball 49 by which it may be engaged with a manually operated device located at the loading point and common to all of the valves (see Figs. 1, 2, 3, 4 and 14). This manually operated device consists of a hand lever 50 to the lower end of which is pivoted a link 51 having bolted thereto a reduced flattened extension 52 which is pivotally connected by a transversely extending pin 53 with the flat shanks of a pair of aws 54 shaped to receive the ball 49. These jaws are bolted to an arm 55 to which is connected a brace 56, the free ends of the b ace and arm having connected therewith a sleeve 57 which is journaled upon the reduced upper end 58 of an upright post 58. 1V hen the carrier comes to rest, the ball 49 of the valve mechanism is engaged with the jaws 54 and the operator is then enabled to manipulate the hoisting and supporting mechanism to hoist the casting and discharge it in the manner explained.

, The hoisting cylinders 10 are supplied with air from common source and to that end each of the supply pipes 35 is projected through an opening in the hub 8 of the carrier and is secured to and communicates with a hollow distrilmting head 59 open at its lower end, which is mounted for rotation in the upper end of a chest 60, a suitable stufiing gland being interposed to prevent leakage. The chest 60 is stationarily supported in the upper end of the standard 2 and supplied with air under pressure from any suitable source through a pipe 61.

Power-operated means are provided for rotating the casting carrier from one point to another and means are also provided for locking the carrier in different positions of rotation (see Figs. 3, 7, 8 and 9). There are provided a series of equally spaced arms 62, these arms projecting from an annular flange 63 depending from the under side of the supporting table 5, this flange also serving to retain the races for the ball bearings 7 and being journaled upon the cylindrical boss 6. A fluid pressure cylinder 64 is arranged horizontally on the base, as shown in Fig. 1 and has a piston rod to the outer end of which is pivoted by a horizontal pivot 66 a pawl-like member 67 which has its free end provided with a downwardly extending beveled nose 68, the pawl also having in line with the nose a roller 69 journaled on a pin 70. The piston rod is provided with a bracket 71 which has a square opening to receive a stationary guide rod 72, and the pawl 67 also has secured thereto a bracket having a recess open on its under side to receive the square guide rod 72 when the pawl is in operative position, but permitting the pawl to be raised therefrom for the purpose to be explained. The cylinder 6 1, shown in detail in Fig. 12, has connected with the respective ends thereof air pipes "Mr-and 75 which lead to an operators station S, and provided with suitable valves so that the piston of the cylinder may be controlled. When air is admitted in through the pipe 74 the piston rod is projected out wardly, or to theright in Fig. 8 and Fig. 9, and the beveled nose 68 of the pawl, striking that arm 62 which is in position to be engaged thereby, raises the roll 69 to permit it-to ride over the arm and thereafter drop on the rear side of the arm, considering the direction of rotation. By then admitting air through the pipe 75 and opening the pipe 74 to atmosphere, the piston rod is drawn in the opposite direction, carrying with it the rotatable casting support to the next position of oper-- ation.

' ated latch 7 6 which is pivoted on a pintle 7 7 carried by ears 78 formed integrally with the bridge piece 6, the latch preferably having an inserted metallic bearing block 79 and resilient cushion 80, as shown in Fig. 9, to cushion the shock of arresting the carrier. The latch has a beveled nose 81 normally standing in the path of movement of a lug 820:1 the lower side of each of the arms 62 and also has a recess 83 to receive this lug to thereby lock the carrier. To release the latch. there is provided a small fluid pressure cylinder 84 secured to the under side of the bridge piece 6 to which is connected an air pipe 85 leading to the operators station S, where it is provided with a controllmg valve. The piston rod 86 of the piston of this cylinder extends through the bridge piece 6' and cooperates with the tail 87 of the latch to disengage the latch from the lug 82. The tail of thelatch has a weight 88 to normally hold the latch in the path of the lugs 82 and which also acts to restore the piston to normal po'sit1on.

The sand is loosened and freed from the castings by means of a pneumatic hammer, the 1 details of which are illustrated in Figs. 1, 2 and 13. A horizontally-arranged fluid pressure cylinder is indicated at 89, to the valve mechanism of which air is supplied through the pipe 89 leading from the ope'rators station, where it is provided with a controlling valve; 90 representing the piston rod which is provided with an enlarged head 91. The cylinder is secured to a slide 92 by straps 93. The slide 92 is slidably mounted for horizontal movement upon a support 92, a screw 94 threaded in the slide and held against axial movement by a yoke 95 being employed to adjust the slide and cylinder horizontally relatively to the support. The yoke is loosely mounted upon a pair of rods 96 projecting from the support and coil springs 97 are intel-posed between the yoke, the support and the heads of the rods to cushion the shock. The support 92 is slidably mounted for vertical adjustment upon a pair of hollow standards 98 and counter weights 99 located within the standards and connected to the supports by cables 100 which pass over sheaves 101 are employed to counter-balance the weight of the support and cylinder. The vertical adjustment of the cylinder 89 is efiec ted by a fluid pressure cylinder 102 whose piston rod 108 is connected to the support and which receives air under pressure through pipes 104 leading to the operators station, where they are equipped with controlling valves. An anvil 105, mounted upon a suitable support 106 cooperates with the pneumatic hammer; this support 106 being preferably connected with the support 107 for the standards 98 by the plates 108 and the upper ends of the columns further connected by a cross member 109, so as to lend rigidity to the structure. To discharge the castings the hoisting devices are manipulated by a manually operated lever 50 similar to the lever 50, located at the operators station as shown in Fig. 1. This lever 50" is connected with a pair of jaws 5 1 by a link 51 the jaws being formed and supported similar to the jaws 54-.

After the castings have been cleaned they are discharged from the hoisting device and fall on a chute (see Figs. 1, 2, 10 and 11). The chute has an inclined portion 110, a horizontal portion. 111 and vertical sides 112 which are riveted to a pair of channel irons 113. These channel irons rest upon a base plate 114 which in turn is supported by the beams 1, the channels being held against lateral movement by clamps 116 but permitted longitudinal movement. Also secured to the channels 113 at the discharge end of the chute is a bumper 117 and cooperating with the bumpers are shock absorbing coil springs 118 which are carried by a block 119 carried by the base plate 114. Under the impact of the casting against the bumper the entire chute structure is permitted longitudinal movement which is resisted by the springs 118.

The castings come to rest in front of a pair of rams 120 each of which is provided with to engage the next succeedin releases the latch 76 by admitting air to the a nose 121. The rear ends-of these rams are connected with a cross-head 122 to which is secured the piston rod 123 of the piston 12 1 of a fluid pressure cylinder 125 mounted in suitable supports 126 on the bed plate 114. Air lines 127 and 128 lead to the respective ends of this cylinder from the operators station S. A pair of rails 129 extend laterally from the chute in parallel relation with the rams 120. After the casting has been deposited in front of the rams, the operator y admitting air to the rear end of the cylinder 125, projects the rams outwardly through openings in the side walls of the chute, cans ing the rams to shove the casting .upon the rails 129, which lead to a suitable point of discharge.

The operation is as follows: The cylinder of the pneumatic hammer is adjusted to the proper position to adaptit to the castings to be cleaned by adjusting it horizontally by means of the screw 94: and vertically by the cylinder 102. The castings to be cleaned which in the present case are the bolsters of railway trucks, indicated at C, are loaded onto the carrier at that end of the apparatus shown in the bottom of Fig. 1. lVhen. the carrier comes to rest by the automatic engagement of the latch 76 with one of the lugs 82, the hoisting devices at loading position are lowered, the jaws 21 adjusted to one end of the casting and the casting hoisted so as to hang downwardly as indicated in dotted lines in Fig. 3. The operation of lowering and raising the hoisting device is accomplished by admitting and exhausting air from the respective ends of the cylinder by the operator manipulating the hand lever (-0 at the loading position. The next step is to swing the casting to a position to be operated upon by the pneumatic hammer and this is accomplished by an operator stationed at the operators station S who admits air into the cylinder 64 to move the pawl 67 to a position g arm 62, then cylinder 84;, and then admits air to the opposite end of the cylinder 6a to swing the carrier until it is againarrested by the automatic engagement of the latch 76 with the lug of that stop arm which is engaged by the pawl 67. The operator at the station S then admits air to the cylinder 89 which causes a series rapid blows to be imparted to the casting by the head 91 cooperating with the anvil to loosen and eliminate the core sand from the casting which drops to a suitable point of discharge beneath the hammer. In the meanwhile another casting is being placed upon the carrier at the loading position in the manner before described. After the casting at the cleaning position has been thoroughly freed from sand, the carrier is again rotated in the manner previously de* scribed to bring the cleaned casting to the discharging position above the chute and the next succeeding casting to the cleaning position. As the hoisting device carrying the cleaned casting moves to discharging position, the weight 31 rides upon the inclined track 82 and projects the rods 2% beneath the cross-head 22. The operator at the station S, then, by manipulating the hand lever 50, lowers the hoisting device suspending the cleaned casting so as to permit the cross-head 22 to rest upon the rods 2i and slacken the cable, thus permitting the jaws 21 to spread apart sufiicient-ly to release the casting which drops upon the chute and slides to a position in front of the rams 120. The operator then by admitting air to the rear end of the cylinder 125 pushes the cleaned casting up onto the rails 129, which action also pushes castings which have been previously deposited upon these rails a step further toward a suitable point where they may be removed by the workmen.

Applicants have made a divisional application Serial No. 399,681, filed October 1441i. 1929, for the means for supporting and adjusting the power-operated hammer.

Having thus described our invention, we claim:

1. In an apparatus of the character described, a rotatable upright support, radially extending arms carried by the upper end of said support, a plurality of fluid-pressure cylinders, one for each arm, arranged about the lower portion of said support and rotatable therewith, and hoisting devices on each arm connected with the piston of the corresponding cylinder.

2. In an apparatus of the character described, a stationary upright member, an upright rotatable support mounted on said member, radially extending arms carried at the upper end of said rotatable support, a plurality of fluid-pressure cylinders, one for each arm, carried by the lower end of said support and rotatable therewith, and hoisting devices on each arm connected with the piston of the corresponding cylinder.

3. In an apparatus of the character described, a rotatable upright support, radially extending arms carried at the upper end thereof, a fluid-pressure cylinder for each arm arranged about the lower portion of said support and rotatable therewith, hoisting de vices on each arm connected with the piston of the corresponding cylinder, valve mechanism for each cylinder including a projecting valve stem, and a manuallvopcrated controlling device common to all of said valve stems located in proximity to the loading position of said apparatus.

L'In an apparatus of the character described, a rotatable carrier including a plurality of radially extending arms; a plurality of power-operated load hoisting and supporting mechanisms for castings mounted on said carrier, including a-fluid pressure cylinder and control valve for each mechanism, sheaves mounted on each arm, a cable for each mechanism passing over saidsheavesand connected With the piston of the corresponding cylinder, and clamps hung from said cable; and a manually operated controlling device common to all of said valves located in proximity to the loading position of said mechanism.

the loading position of said devices.

, 6.In an apparatus of the character described, a rotatable carrier, a load hoisting and supporting mechan sm mounted on said carrier, including connecting devices -lor the load, and an automatically-operated support adapted at one point in the rotation of said carrier to relieve said mechanism from the weight of the load prior to the release of the load by said connecting devices to permit said connecting devices to be released from the load.

7. In an apparatus of the character de scribed, a rotatable carrier, load hoisting and supporting mechanism mounted on said carrier, including releasable connections for connecting the load to said mechanism, a normally inoperative device for relieving said mechanism from the weight of the load prior to the release of the load by said releasable connections, and means at one point in the rotation of said carrier for throwing said device into operative position.

8. In an apparatus of the character described, a movable carrier,a load hoisting and supporting mechanism mounted on said carrier, said mechanism including a cable and a pair of pivoted clamping members suspended by said cable, and a normally inoperative support for relieving the cable from the weight of the load, together with means at one point in the movement of the carrier for placing said support in operative position.

9. In an apparatus of the character described, a movable carrier, a load hoisting and supporting mechanism mounted on said carrier, said mechanism including a cable, a pair of pivoted clamping members suspended by said cable and a head to which said clamping members are pivoted; and means at one point in the movement of said carrier cooperating with said head for relieving the cable from the weight of the load to permit the clamping members to release the load.

10. In an apparatus of the character de scribed, a movable carrier, a load hoisting and supporting mechanism mounted on said can rier, said mechanism including a head, a pair of clamping members pivoted to said head and a cable suspending said clamping members; and a movable normally inoperative support for said head mounted on said carrier, together with means at one point in the movement of said carrier for projecting said support beneath said head whereby the cable may be relieved from the weight of the load topermit the clamping members. to release the load.

11. In an apparatus of the character described, a movable carrier, a load hoisting and supporting mechanism mounted on said carrier including a cable, a head and a pair of clamping levers pivoted to the head and supported by the cable, and a normally inoperative support for said cable mounted on said carrier, said support including a pivoted arm, and a member located atone point in the movement of said carrier for engaging said arm to project said support-in the path of said head. a

12. In an apparatus of the character deseribed,a movable carrier, a hoisting and sup porting mechanism mounted 011 said carrier including a cable, a head and a pair of clamp-. ing leverspivoted to the head supported by the cable; a normally inoperative support for said head mountedon said carrier, said support including a rock shaft, arms connected with said shaft,frod s carried by said arms, and a third arm connected with said shaft; and a member located at one point in the retation of said carrier to engage said third arm to rock said shaft and project said rods beneath said head.

13. In an apparatus of the character described, a revoluble upright support, a plurality of arms extending radially from the upper portion of said support, a plurality of fluid-pressure cylinders connected with said support to rotate therewith and located beneath said arm, hoisting mechanism carried by each of said arms and connected with the piston of the corresponding cylinder, valve mechanism for each of said cylinders, a manually-operated controlling device common to all of said valve mechanism located in proximity to the loading position of said apparatus, and a second manuallv-operated controlling device common to all of said valve mechanisms located in proximity to the load discharging position of said apparatus.

14:- In an apparatus of the character described, a rotatable carrier, a plurality of power-operated load hoisting and supporting mechanisms mounted on said carrier each including a fluid pressure cylinder and controliso ling valve for same, a manually operated controlling device common to all of said valves located in proximity to the loading position of said mechanisms, and a second manuallyoperated controlling device common to all of said valves located in proximity to the load discharging position of said mechanisms.

15. In an apparatus of the character described, a rotatable carrier; a plurality of power-operated load hoisting and supporting mechanisms mounted on said carrier, each mechanism including a fluid pressure cylinder, a controlling valve for same, a cable having one end connected with the piston of said cylinder, and clamps connected with the other end of said cable; a manually-operated controlling device common to all of said valves and located in proximity to the loading position of said mechanisms, and a second manually-operated controlling device common to all of said mechanisms located in proximity to the load discharging position of said mechamsms.

16. In an apparatus of the character described, a rotatable carrier including a plurality of radially-extending arms; a plurality of power-operated load hoisting and supporting mechanisms mounted on said carrier, including a fluid pressure cylinder and control valve for each mechanism, sheaves mounted on each arm, a cable for each mechanism passing about said sheaves and connected with the -piston of the corresponding cylinder, and

clamps hung from said cable; a manuallyoperated controlling device common to all of saidvalves located in proximity to the loading position of said mechanism, and a second manually-operated controlling device common to all of said mechanisms located in prox imity to the load discharging position of said mechanisms. I y

17. In an apparatus of the character described, a vertical supporting standard, a sleeve rotatably mounted on said stant ard, a plurality of radiallv-extending arms at the upper end of said sleeve, a support at the lower end of said sleeve, a plurality of fluid pressure cylinders mounted on said support, one for each arm, load hoisting devices can ried by each arm and connected with the piston of the corresponding cylinder, a valve for controlling each cylinder, common manually-operated controlling means for controlling said valves located in proximity to the loading position of said devices, and a second manually-operated controlling device common to all of said mechanisms located in proximity to the load discharging position of said mechanisms. I i c 18. In an apparatus of the character described, a movable carrier, a load hoisting and supporting mechanism mounted on said carrier, including a fluid pressure cylinder and a controlling valve for same, a normally inoperative auxiliary support for receiving the load, together with means to placing said auxiliary support in operative position at the discharging position of said mechanism, and manuallyoperated means for controlling the valve at the load discharging point.

19. In an apparatus of the character described, a movable carrier, a load hoisting and supporting mechanism mounted on said carrier, including a fluid pressure cylinder and a controlling valve for same, a manuallyoperated device for controlling said valve at the loading position of said mechanism, a second manually-operated device for controlling said valve at the discharging position ot said mechanism, a normally inoperative auxiliary support for receiving the weight of the load, and means for placing said auxiliary support in operative position at the discharging position of said mechanism.

20. In an apparatus of the character described, a movable carrier, a load hoisting and supporting mechanism mounted on said carrier including a fluid pressure cylinder and a controlling valve for same, manual means for controlling said valve at the load ing position of said mechanism, a second manual means for controlling said valve at the discharging position of said mechanism, a normally inoperative auxiliary load support mounted on said carrier, and means for placing said auxiliary support in operative position to receive the load at the discharging point of said mechanism.

21. In an apparatus of the character described, a movable carrier; a load hoisting and supporting mechanism mounted on said carrier including a fluid pressure cylinder and a controlling valve for same and also including a head, a pair of load clamping levers pivated to said head, a cable, and a connection between the levers and the cable; nianually-operated means for controlling said valve at the loading position of said mechanism to hoist and support the load, a normally inoperative auxiliary support mounted on said carrier, means for projecting said support under said head at the discharging position of said mechanism, and a second manually operated means for controlling said valve at the discharging position or said mechanism whereby the head may be lowered upon the said auxiliary support and the cable slackened to permit the lovers to release the load.

22. In an apparatus of the character described, a movable carrier, a hoisting and supporting mechanism mounted on said carrier including a fluid pressure cylinder and a controlling mechanism tor same havlng a movable part, and manually-operated devlces located at one point in the movement of said carrier for controlling said valve including a lever and means for connecting said lever to said movable valve part.

said carrier for controlling said valve including a lever, a swiveled member to engage said movable valve member, and a link connecting said lever with said swiveled member.

24. In an apparatus of the character described, a rotatable carrier, a plurality of load hoisting and supporting mechanisms mounted on said carrier in spaced relation to each other, a fluid pressure cylinder having a piston rod for rotating said carrier a pre-determined distance upon each reciprocation of said piston, and means for connecting said piston rod with said carrier at the end of its nonworking stroke.

25. in an apparatus of the character de scribed, a. rotatable carrier, a plurality of load hoisting and supporting mechanisms mounted on said carrier in spaced relation with each other, radial arms, one for each mechanism, projecting from said carrier, a fluid.

pressure cylinder for rotating said carrier having a reciprocating piston rod, and means for engaging said rod alternately with said arms.

26. In an apparatus of the character described, a rotatable carrier, a plurality of load hoisting and supporting mechanisms mounted on said carrier in spaced relation with each other, radial arms, one for each mechanism, projecting from said carrier, a fluid pressure cylinder for rotating said carrier having a reciprocating piston rod, and a pivoted pawl on said rod engageable alternately \VltllSfilCl arms upon the non-worklng stroke of said piston.

27. In an apparatus of the character de: scribecha rotatable carrier, a plurality 0t load hoisting and supporting mechanisms mounted on said carrier in spaced relation with each other, radial arms, one foreach mechanism, projecting from said carr er, a horizontal fluid pressure cylinder having a reciprocating piston rod, a pivoted pawl on the outer end of said rod, a guide rod in parallel relation with said piston rod, a guide block connecting said piston rod and guide rod, a second guide block open on the under side connecting said pawl wlth said guide rod, a roller carried by said pawl, and a beveled nose on the end of said pawl engageable alternately with said arms to lift said roller over said arm and permit it to engage the rear side of the arm.

28. In an apparatus of the character described, a rotatable carrier, a plurality of load hoisting and supporting mechanisms mounted on said carrier in spaced relation to each other, a fluid pressure cylinder having a piston rod for rotating said carrier a predetermined distance upon each reciprocation of said piston, means for connecting said piston with said'carrier at the end of its nonworking stroke, a pivoted gravity-operated latch automatically engageable with said carrier to arrest its movement, and a fluid pressure cylinder to release said latch.

29. In an apparatus oi the character described, a rotatable carrier, a plurality of load hoisting and supporting mechanisms mounted on said carrier in spaced relation with each other, radial arms, one for each mechanism, projecting from said carrier, a fluid pressure cylinder tor rotating said carrier having a reciprocating piston rod, means for engaging said rod alternately with said arms, a gravityoperated latch for automatically engaging said arms to arrest the rotation of said carrier, and a fluid pressure cylinder for releasing said latch.

30. In an apparatus of the character de scribed, a-rotatable carrier, a load hoisting and supporting mechanism mounted on said carrier, an inclined chute located at the discharge point of said carrier terminating in a horizontal portion, and a pair of power-operated rams movable across said horizontal portion.

31. In an apparatus or" the character described, a rotatable carrier, a load hoisting and supporting mechanism mounted on said carrier, an inclined chute located at the discharge point of said carrier terminating in a horizontal portion, a pair of rams movable across said horizontal portion, a fluid pressure cylinder, a cross head connecting said rams, and a connection between the piston of said cylinder and said cross head.

32. In an apparatus of the character described, a rotatable carrier, a load hoisting and supporting mechanism mounted on said carrier, an inclined chute terminating in a horizontal portion at the discharge point of said carrier, a bumper at the outer end of the horizontal portion of said chute. means for supporting said chute, said chute and bumpor being capable of a limited movement longitudinally of said support under impact upon said bumper, and shock absorbing means cooperating with said chute and bumper to limit the movement thereof and restore them to normal position.

In testimony whereof, we have hereunto set our hands this 21st day of June, 1927.

I WILLIAM C. SPEGK.

EUGENE BARKER.

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