US1882440A - Apparatus for handling sand and similar material - Google Patents

Description

Oct. 11, 1932. w. E. NAYLOR APPARATUS FOR HANDLING smn nn smm MATERIAL 4 Sheets-Shet 1 Filed Aug. 1. 1929 Oct. 11, 1932. "w. E. NAYLOR APPARATUS FOR HANDLING SAND AND SIMILAR MATERIAL Filed Aug. 1. 192's v 4 Sheets-Sheet 2 Oct. 11, 1932. 1,882,440;

nrm'ws FOR HANDLING slum Ann sun-1m u'raam.

W. E. NAYLOR 4 she'ets-sneet 4 Filed A 1. 1929 Patented Oct. 11,- 1932 UNITED STATES PATENT OFFICE WALTER E. NAYLOR, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE BEABDSLEY & PIPER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS APPARATUS FOR HANDLING SAND AN'I) SIMILAR MATERIAL Application filed August 1, 1929. Serial No. 882,659.

'from the conveyor into a tank so that the delivery of sand will be discontinued when the tank has been filled-to a predetermined level.

' Another object is to provide a system of this type with means for automatically controlling the operation of the 'conveyor, so

that the conveyor will remain operative only when required to fill the tanks.

Another object of the invention is to provide a system in which one or more tanks are supplied with sand from an endless con veyor with means for automatically controlling the operation of the -conveyor, and mechanism for supplying sand tothe conveyor, so that they will be operated only when sand is required to fill one or more of the tanks, and so that the operation of the conveyor and said mechanism will be discontinued when the tanks have-been filled.

Other objects of the invention will appear from the detailed description.

The invention consists in the several novel features hereinafter set forth and more particularly defined by claims at the conclusion hereof. l

In the drawings: Fig. 1 is an' elevation of a system embodying the invention. Fig. 2 is a transverse section on line 2-2 of Fig.

1. Fig. 3 is a section through a portion of,

one of the tanks and the associated switch mechanism controlled by the load in the tank.

' Fig. 4 is a side elevation of one of the. sand deflecting devices. Fig. 5 is a plan ofone of the deflecting devices. Fig. 6 is a diagram of the electrical connections for automatical- 1y controlling the operation of the system. The invention is exemplified in a system comprising a storage tank or reservoir A which is adapted to hold a supply of sand sufiicient in quantity for supply the system. An endless slat-conveyor a at the bottom of this reservoir is adapted to feed the sand in regulated quantity from the reservoir to an elevator B. An electric motor a is suitably connected to drive the conveyor a by means of a sprocket chain a and speed reducing gearing a between said sprocket and the shaft a for the ulley which drives said conveyor. The san -elevator B comprises a leg I) and an endless chain bequipped with 5 buckets 6 a lower idler sprocket b and an upper drive sprocket b for chain 6 An electric motor'b is connected to drive the shaft of elevator-sprocket b through suitable speed-reducing gearing b. The conveyor a" discharges the sand into a hopper b which directs it into elevator-buckets b which convey it upwardly in leg 6- and deliver it into a discharge spout b. An endless conveyor C, supported on a suitable framework 0', 7 is provided to convey the sand along the room for distribution and delivery into tanks D which are suitably supported under said conveyor. An electric motor 0 is connected .to drive the distributing-conveyor G, by 0 means of a sprocket-chain 0 and speedreducing gearing 0, which drives a pulley 0 around which the conveyor-belt O passes. At its other end said belt passes around an idler pulley c. This conveyor is supported 5 at its ends by said pulleys 0 0 and therebetween by upper rolls' 0 and lower rolls 0", which are mountedin bearings secured to longitudinal beams 10 of frame-work 0 Above each tank D is a discharge-device E m for striking or deflecting the sand from the conveyor belt C so it will fall over the sides of the belt and into, the tank. Each discharge device E comprises a V-shaped plow. or deflector 11 which is adapted to overlie, 05 and extends across the upper face of the conveyor-belt C, so that the sand carried by the moving belt will be deflected. oil the margins of the belt and fall into the subjacent tank D. The plow 11 is fixed to arms 12 and f over the belt C or raised above the sand on the belt, so it will be inoperative to dis+ I charge the sand into the subjacent tank.

The mechanism for raising and lowering the plow 11 comprises an electric torque motor 14 which is mounted at one side of the belt C on a cross-beam 15 which is fixed to'lon- 'tudinal beams 10; a sprocket-wheel 16 xed to the shaft of said motor; a chain 17 driven by said sprocket and a sprocket wheel 18 which is fixed to one end of rockshaft 13. The plow 11 and arms 12 are adapted to fall by gravity. and an arm 19 with an adjustable weight 20 serve to provide suflicient counterweight to prevent the sudden dropping of the plow. Motor 14 is torque wound so that when current is supplied there- Y to its' armature will be energized to rotate sprocket 16 in one direction until the. low 11 is lifted into its inoperative'position a ove the sand on belt C, and to retain it in raised positionuntil the current is cut off so that the plow will be free to fall by gravity. A suitable stop 21- is provided for limiting the lifting of the plow by the motor. Stops 21 are adjustablfsecured by nuts to bar 21 which is fixed to the plow, so the plow when lowered will be held over the belt C without resting thereon. A plate 22 underlies the conveyor belt C to keep it flat under 'each plow-11. Each plate 22 is supported by cross-bars 23 which are fixed to the beams 10. Shaft 13 is mounted in bearing brackets 24. which are fixed to the beams 10. This construction exemplifies a device forstriking or deflecting sand from the distributing endless conveyor C, and raising and lowering mechanism therefor which comprises an electric motor, which may be automatically controlled as hereinafter set forth.

Each tank D is equipped in one of its sides with a diaphragm d which may be of flexible material, such as cloth or suitable rubber. An

opening (1 is formed in the tank D, across which the diaphragm d is extended, so it will be deflected outwardlyby the pressure of the,

sand. in the tank to automatically control -switch-mechanism. The margin of this diaphragm is clamped by bolts (1 between the contiguous sidewall of the tank and the flange dof a rectan lar frame or box 41. The central or de ectable portion of the diaphragm is connected to operate swich-mechanism for controlling a circuit for the operation of onev of the torque motors 14 and also circuits for controlling the operation of the motors a, b, and -c. This switch-mechanism' comprises a slidable sleeve 30, a pair of stationary contacts 31 and 32 which are adapted to be electrically connected by a flange 33 on sleeve 30, and a pair of stationary contacts 34 and 35 which are adapted to be electri- All of these stationary contacts are-.mounted cally dbnnected by a flange 36 on said sleeve. 7

on a bar 37lof insulatin material whichis'.

secured in the box 12.

leeve 30 is slidably mounted in bar 37. A stem 38, fixed'toa plate 39 which'is secured by bolts 40 to the f diaphragm d, is adapted to slide in sleeve30,

the outward movement of the diaphragm by the sand in the tank D until it has been apj.

roximately filled or a predetermined quanity of sand has been delivered into the tank,

so that the'stem 38 will, when the tank has been filled, be moved outwardly bythe pressure of the sand in. the tank'against diaphragm d, to shift the sleeve 30 to establish a circuit through the torque motor 14, to

raise the deflector 11 which discharges sand into said tank. Contacts 34 and 35 also control a circuit for causing the motor a to drive conveyor C to deliver sand to. the deflectors 11 while the associated tank D is not full, and flange 36 is separate from said contacts when the sleeve 30 is shi ed outwardly by a full load in the tank. Flange 33 is normally 1 separated from contacts 31 and 32 so that circuit forthe motor 14 for operating the associated deflector will remain open until the diaphragm d has been shifted by a full load in the tank. When the tank has been :filled, the flange 33 of sleeve 30 will bridge contacts 31 and 32 to close a circuit for the operation of the motor 14 to lift the associated deflector 11 and discontinue the disphragm d to prevent excessive pressure against the stationarycontacts, by the material which falls into the tank after the deflector has been raised, or bythe spring 41 when the tank is empty.

The electrical equipment comprises a line composed of conductors 41, 42, and 43 connected to a suitable source of current; athree blade switch 44, connected to the line conductors respectively; conductors 45, 46 and 47 which are connected to the blades of said switch and respectively to the motor-a for driving the belt a which feeds sand to the elevator from reservoir A, the motor 5, which drives the elevator B, and the motor 0 which drives the distributer belt C; overload relays 48 included in conductors 45, 46, and 47 to cut off current when the load becomes excessive; a relay for closing switch 44 comprising an armature 50' connected to switch 44 a helix 49 included in a conductor 51 which is connected to the line conductor 43 and through the overload relays to the con-- tacts 34 of all the pressure-operated switches associated with the tanks D; a switch 52 for each motor 14 having three blades included respectively in branch conductors 41*, 42" and 43 which are connected to the line-conductors; relays for closing switches 52, each comprising a helix 53 included in a conductor 54 which leads from the conductor 43 to a contact 31 and an armature 56; and conductors 55, each connected to one of the conductors 42and to contacts 32 and of each of the pressure-operated switches. Switch 44 is held normally open b a spring 58. A switch 59 is included in con uctor 51, so that the system may be manually controlled and stopped when desired.

The operation of the system is as follows:

Assuming tanks D to be empty, the electrical connections will be as shown in Fig. 6. The circuits through motors 14 will be open and deflectors 11 will be lowered. A circuit through helix 49 for shifting armature 50 to close the switch 44 and circuits through motors a", b", and a will be established as follows: line conductor 42, branch conductor 42', conductors 55, contacts 35, flange 36 of sleeve 3Q, contact 34, conductor 51, in which helix 49 is included, and line conductor 43. As a result, helix 49 will be energized, and armature 50 will close switch 44 and establish circuits which will simultaneously cause the motor a to drive belt a for delivering sand from tank A to the elevator, the motor 6 to drive the elevator B which will deliver the sand onto the conveyor belt C and the motor 0 which will drive the distributer' belt a C. As long as any of the pressure operated the tanks D, the circuits for the operation of the torque motors 14 being open at switches 52. When any of the tanks D has been filled, the pressure of the sand therein will operate its diaphragm d and shift the associated switch sleeve 30 outwardly to close a circuit through the associated helix 53 to operate its armature 56 and close switch 52 to connect the associated motor 14 to the line and cause it to lift the deflector 11 to which it is connected, into its inoperative position, and thus cause the'discharge of sand into that tank to be discontinued, These circuits, through helices 53 will be as follows: conductors 42, 42, conductor 55, contacts 32, flange 33 of sleeve'30, contact 31, conductor 54, inwhich a helix 53 is included,'and conductors 43* and 43. This will cause the helices 56 to shiftswitches 52 and close the circuits for motors 14. As lon as the ressure operated switches remain 1n their s ifted positions, the motors 14 will be operative to hold the deflectors 11 raised or. inoperative. As soon as the sand is discharged from any of the tanks D, spring 41 will retract sleeve 30 to interrupt the circuit through its associated helix 53, and switch 52 Wlllbe opened by its spring 57, to cutoficu'r int from the associated motor 14, so it will? ermit the deflector 11, connected thereto, .to drop. So long as any of the pressure-operated switches remains in its normal position, the circuit through helix 49 will remain closed to continue the operation of motors a 6 and 0 so that the delivery of the sand 'will be continued until all of the tanks D have been filled. When all of the tanks D have been. filled, the delivery of sand by the conveyor C will be discontinued, because the circuit through helix 49 will be interrupted at all contacts 34, and 35, so that the switch 44 will be released and restored to its open position by spring 58. Thereupon, the cirthen shift switch 44 to automatically start the operation of motors (1 ,5 and c for delivering sand to the deflectors 14. When this occurs, the switch 52, associated with the empty tank D, will be open so the deflector above the tank will be lowered, and the switch 52 associated with a full tank D will be closed, so the deflector 11 associated with the latter tank will be inoperative. Each tank D is usually equipped with a motor driven conveyor 60 for discharging sand therefrom into receptacles.

The invention exemplifies means for automatically controlling the operation'of devices for discharging the material from the conveyor-belt into the tanks. tion also exemplifies means which, when the tank has been filled, will automatically discontinue the discharge of sand from the belt into the subjacent tank, and which, when the material in the tank falls below a predetermined level, will be automatically rendered operative to fill the tank. The invention also exemplifies a sand delivery system adapted for discharging sand into a plurality of tanks, with means-for automatically con trolling the delivery of sand by the-conveyor, so that the delivery of sand will be automate ically discontinued when the tanks are filled and automatically started when thetanks The invenare empty. The invention also exemplifies means comprising an electric-motor for shiftthe discharge device into and out of ope'r 1. In a system of the character described,

the combination of an endless conveyor for continuously supplying material, a receptacle for receiving the material from the conveyor, a deflector for discharging the material from the conveyor into the receptacle,

positioned above the conveyor and pivoted to swing upwardly into and out of its operative position, means for swinging the deflector upwardly out of operative position-with respect to the conveyor comprising an electric motor, and switch-means, controlled by the material in the receptacle, for controlling the operation of the motor.

, 2. In a system of the character described,

the combination ofan endless conveyor for supplying material, mechanism for delivering the material to saidconveyor, a receptacle for receiving the material from the conveyor, a movably mounted deflector for discharging the material from the conveyor into the receptacle, mechanism for driving the conveyor, mechanism for driving the de-v livery mechanism, means for shifting the deflectorinto and out of operative position, controlled by the material in the receptacle, and means, also controlled by the material in the receptacle, for conjointly controlling the operation of the driving, conveyor and delivery mechanisms.

3. In a system of the character described, the combination of an endless conveyor for supplying material, an elevator for delivering the material to the conveyor, a receptacle for receiving the material from the conveyor, a movablymounted deflector for discharging the material from the conveyor into the receptacle, mechanism for driving the conveyor, mechanism for driving the elevator, means for shifting the deflector into and out of its operative positionflcontrolled by the .material in the receptacle, and means also controlled by the material in the receptacle for conjointly controlling the operation of driving mechanisms .for the conveyor and elevator. Y

4. In a system of the character described, the combination of an endless conveyor for supplying material, mechanism for deliver: t e material onto the conveyor, a plufity of receptacles .for receiving the material fromthe conveyor, movably mounted deflectors for discharging material from the conveyor into the race tacles respectively,

for e conveyor, mecha- 1 ni'sm for driving the delivery mechanism, 'means for shifting the deflectors into and out of their operative positions, controlled by the material in the receptacles respectively, and means, also controlled by the material in the recgptacles, for conjointly controlling the operation of said driving mechanisms to stop automatically the conveyor and delivery mechanism when all of the receptacles have been filled, and to start them when the material in any receptacle falls below a prependently shifting-the @eflectors into and.

out of their operative positions controlled by the material in the receptacles, and switch- ,means controlled by the material in all the receptacles, to control conjointly the motors for driving the conveyor and the delivery mechanism.

6: In a-system of the character described, the combination of an endless conveyor for supplying material, an electric motor for driving the conveyor, mechanism for delivering material to the conveyor, an electric motor for driving the delivery mechanism, receptacles for receiving the material from the conveyor at different points, movably mounted deflectors for discharging the ma-' terial from the conveyor into the receptacles respectively, electric motors for independently shifting the deflectors into and out of their operative positions, switch means, controlled by the material in the receptacles, for controlling the deflector shifting motors to render the deflectors inoperative, and switchmeans, also controlled by the material in the receptacles for conjointly controlling the motors for driving the conveyor and the delivery mechanism.

Signed at Chicago, Illinois, this 26th day of July, 1929.

WALTER NAYLOR.

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