US829057A

US829057A - Means for hoisting and conveying two-rope grab-buckets.

Info

Publication number: US829057A
Application number: US30045506A
Authority: US
Inventors: Alexander E Brown
Original assignee: BROWN HOISTING MACHINERY CO
Current assignee: BROWN HOISTING MACHINERY Co
Priority date: 1906-02-10
Filing date: 1906-02-10
Publication date: 1906-08-21
Anticipated expiration: 1923-08-21

Description

N0. 829 057 PATENTED AUG. 21, 1906. A- E. BROWN. MEANS FOR HOISTING AND CONVEYING TWO ROPE GRAB BUGKBTS.

APPLIOATION FILED FEB.1D.1906.

4 SHEETSSHBET 1.

1 E ST- o i: ATZZT/ZY.

No- 829,057. PATENTBD AUG. 21, 1906; A E. BROWN. MEANS FOR HOISTING AND CONVEYING TWO ROPE GRAB EUOKETS.

APPLICATION FILED FEB 10. 1906.

I. I r- By ATTORNEY.

No. 829,057. PATENTED AUG. 21, 1906. A E BROWN. MEANS FOR HOISTING AND CONVEYING TWO ROPE GRAB BUGKETS.

APPLIOATION FILED I'BB.10, 1906.

4 SHEETB-BHEBT 3.

' mmvron er/fi az y ATTORNEY No. 829,057. PATENTED AUG. 21, 1906.

A. E. BROWN. MEANS FOR HOISTING AND CONVEYING TWO ROPE GRAB BUOKETS.

APPLICATION FILED FEB- 0. 1

4 SHEETS-SHEET 4.

WIN/58558.- {/WENZUR change and shifting of grasp UNITED STATES PATENT oFFIoE.

ALEXANDER E. BROWN, or CLEVELAND, orno, ASSIGNOR BROWN HOISTING MACHINERY COMPANY; OF CLEVELAND, onic.

MEANS FOR HOISTING AND CONVEYING TWO-ROPE GRAB-BUCKETS.

Specification of Letters Patent.

Patented Aug. 21, 1806.

Application filed February 10. 1906. Serial No. 300,455.

To all whom it may concern.-

Be it known that I, ALEXANDER E. BROWN, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a new and fuseful Means for Hoisting and. Conveying Two- Rope Grab -Buckets in Connection with Overhead Tramways, as to which Ihereby declare the followin to be a full, clear, and exact descri tion, ue reference being had and intends to the drawings accompanying and made a part of this specification! My invention relates to and involves the special kind of appliances chiefly employed in hoisting and conveying what is known as the two-rope type of grab-bucket on and in connection with overhead tramways for the purpose of transferring ore, coal, or other gross material from car or boat to stock-pile,-

and vice versa. In this operation the bucket is raised and lowered b the alternate winding up and paying out o the so-called hoisting and hue et-sustaining or shell ropes, respectively, and is then traversed along the bridge-tramway that spans the field of operations by means of a special racking rope and drum, which drum, as well as drums, respectively, for the hoisting and the shell rope referred to are each controlled through clutches and brakes that are controlled by electric circuits manipulated by levers located at a common point. In prevailing methods a given grab and dump involves the exercise of no less than six distinct lever movements on the part of the operator, each in prescribed and rapid sequence, and with a and posture each time. The bucket being above the hatch, with jaws distended ready for its load, the operator first presses a foot-lever to free the hoisting-drum and allow the buc'kets descent by gravity. He next moves a second lever to throw out the clutch between'the hoisting and shell or bucket-sustaining drum and at the same time pushes out a third lever to clutch the hoist-rope drum to the driving-shaft A fourth lever must now be seized to start the shaft, and when the latter's revolutions have caused enough of the hoistrope to be wound up toclose thc buckets jaws or blades it is necessary to at once actuate the levers that clutch both hoist and drums together on their shaft, so that their respective ropes or cables shall thereafter take in at equal pace. When by ,this process the bucket is raised to its trolley, the drums must then be unclutched from the shaft and at the same time a lever be moved to rack the load along the tramwa'y to the dumping-point, when by separate move' ments brakes are set in order to firmly lock the racking and the shell-rope drum, while the bucket empties itself.

It is the object and aim of my present in vention to substitute for the arrangement just described a mechanical method of accomplishing the same results, but with a greatly-reduced number of levers and a corresponding reduction and simplification of -the movements that an operator is called on to make.

In the accom is a longitudina rope and a lated in their normal place upon a driveshaft, together with the lever and lever connections that control their movements. Fig. 2 is a like view of a single racking-drum as employedinmy said method. Fig. 3 is an enlarged detail of the hand-lever, controller, and electric connections thereof shown in Fig. 1. Fi 4 is a like detail of similar parts shown in ig. 2, together with the brakeband and bell-crank connection pertainin to the same, the said band being represented as set. Fig. 5 indicates the lever, bell-crank, and band connections shown in Fig. 4, when the brake-band is off. Fig. 6 is a diagrammatic plan view of a preferential order for the placing of the levers shown. Fig. 7 is a side elevation of a hoisting and conveying 'machine or overhead system containing aselements thereof various features shown in the preceding figures when such features are located in the supporting-frame of said machine, and Fi 8 is a similar view when. the trolley-track is arranged horizontal y f'said frame (instead of on an inclir. with? I. set thereto, as in Fig. 7) and certain of the-deatures previously shown are located iii-the trolley carried by such track.

Similar reference characters are used on the same parts throughout the drawin s.

B is the hoisting and conveying mac e or overhead s stem as a whole.

sliellrope drum as mutually rerying, respectively, the hoist and the bucketsustaining or shell ropes d and d. Around their outer ends braking facilities are provided, as indicated by the brake-shoes b b and brake bands b b. Said drums are mounted through their hubs 1i and h, respectively, and, as shown, have their inner ends in close juxtaposition one to the other.

He? eath and concentric with the drum 1) at its outer end there is mounted the disk (1 of a friction-clutch device. The clutch shown in the drawings is of that order of such devices where the circumferential surface of an annular band or fillet that surrounds and is fastened to a shaft-wheel is moved into forcible contact with a peripheral surface of the part to be driven by distending such band oppositely from its ends. Between the perimeter of the wheel C and the drum D is the band of such clutch, (denoted in the draw ing by 0,) and fastened to the under surface of the drum 1) is a thicker fillet or band of wood, vulcanized fiber, or like material 0, which serves as the shoe or bearing-surface with which the clutch-band comes in contact when the clutch is thrown in.

As indicated by dotted lines, the wheel 0 is keyed or splincd to the shaft A throu h its hub h. A similar clutch-wheel C, wit cor responding clutch-band c and shoe 0, is indicated as concentric with the opposite exterior end of the drum l), or, rather, with an annular flange that projects from that end within. and concentric .with the end of the drum D. The wheel C differs, however, from the wheel C in thatits hub is aprolongation of or is fixed toand within the hub proper of the drum D, and consequently is not keyed to the shaft A, but is mounted loosely thereon and turns with and as a part of said drum. 4

d is a sliding collar around the hub h, adapted to throw the clutch in and out as it is reciprocated, and d is a corresponding collar connected by the rods 1' r with the outer sliding collar D.

L is a forked clutch-lever that straddles the collar d and is pivoted at the fixed point The branches or forks of said lever emrace and engage the collar (1 and its lower arm is connected by the link-pieces l l with.

the solenoid S. Similarly L is a forked clutch-lever that embraces the collar D Its up er arm is connected, as with the linkpiece with an operative handle H, and when said handle is used 7) becomes the fixed point for the lever L. When operated by the solenoid S, as hereinafter explained, its fixed p t will be at p.

S is a solenoid connected by the links I l with the lever-arm L at). Its circuit (re resented by the lines 6 e (comprehends t e handle-bar H and a switch or current-interrupter therein '01, (in dotted lines,) actuated by an electric button 7c, located on said hanloosely on the drive-shaft A.

dle-bar. Said circuit further comprehends an intermediate switch w and an. operative solenoid therefor s. Said handle-bar H is dul r fitted to be oscillated about a point 0 anrf has its lower end provided with a shoe U of any suitable conductive material. Said shoe is preferably given a convexity at its outer face or surface corresponding with. its orbital movement around the center 0 and is duly connected with the circuit (represented by the lines e e) of the solenoid S. In the same circuit and so located that when the handle-bar H is reciprocated the shoe U will be traversed acrossthe same in bearing or contact therewith is a second concen.tric shaped shoe U. The circuit is further in.- terrupted by an intermediate switch to and an operative solenoid therefor s.

M is a motor for driving the shaft A. It is governed by the controller N through the circuit represented by the lines m m. Said controller is adapted to be actuated by oscillating the handle-bar H, with which it is connected by the lever-arm or linkiece Gr, sup; ported in the guides g g and the iioot-lever To compensate for the parallel motion of the lever-arm G at the same time insurin as will be seen, that the clutch on. the hoist drum D is in before the shaft A is started,.a slot t, with a pro ortioned u turn (see Fig. 3) is formed in sai boot, in w iich slot the end of the lever-arm G is duly seated and slides.

P represents the trolley, of a kind suitable for use on an inclined track, as indicated in Fig. 7 by V, and P a trolleyin this case of the so-called man-trolley typc-carry ing within itself the hoist-drum, bucket-sustaining drum, motors, clutching devices, circuit-breaking apparatus, and levers for controlling the same, described.

D is the 'usual rackin -drum for taking in and lettingout the writing-rope d. It is fast to the shaft A, which is driven by the motor M and is provided with a brake, (indicated by the brake-shoe f and the brakeband b.) l The latterthe brake-band b is connected with the handle-bar H by the bell-cranks e and link-pieces e" in any suitable manner, as shown in Fi s. 4 and 5, to enable it to be actuated at wil The motor M is governed by the controller N through a circuit re resented by the lines m lit by means of the handlebar I l and the sliding lever-arm G and boot-lever g, connecting the same. R is a reversing-lever on said controller adapted to be moved from a normal by the solenoid S, whose circuit (represented by the lines f) is connected with the handle-bar H and is there subject to a circuit-interrupter or switch 1', (shown in dotted lines) actuated by an electric button It in the handle roper or grasp of said handlebar. Althoug 1 there are shown the two switches W and W as o crating, respective] y the solenoids S and by which arranged 'Tnent-alesser current is required, nevertheg it is evident that either or both of said switches could be dispensed with and the vided'wi'th the necessary facilities for setting ,hoist and shellro 'tli em at ,willin their respective quadrants'ta-nds, so as to afford the necessary resistance, through their various bell-cranks and levers, to and against any opposite action of thesolenoids with whichthey are connected, also that said levers are assembled in the order perhaps indicated in Fig. 6 at some comnion point convenient for their handling.

Having thus described my said invention, its operation is thus ex lained: Assume, as to the drawin s, that the bucket is empty and suspends immediately below its tramway above the loadingoint with jaws distended and hoist an bucket sustaining drums, as shown, in clutch together. Under these conditions the bucket is allowed to descend by gravity under control of the brake ofthe drum D, durin which 0 eration both es and cl will be paid out at equal pace. n reaching and restin on the stock-pile, by pressin the button on the handle-bar H the so-ca led shell-clutch will be thrown out and the hoist-drum D, the drum whereby'the bucket is closed and hoisted, will be free to move and close the jaws without a' corresponding movement of the bucket-sustaining or shell drum D and its rope. Without releasing his rasp at all the operator, by simply throwing orward the lever H to an upright position, will bring the shoes U and U in bearing throu bout a portion of their surfaces, and there y close the circuit e and actuate the small intermediate solenoid s, so that the switch 11) will be closed, the solenoid S actuated, and the hoist-drum D clutched to the drive-shaft A. B now further pushing the lever H forward t e last anotion of the lever-arm G will be taken u the boot-lever T propelled and the motor Ki started. The hoist-drum now takes up its rope d and both closes the bucket and brin s it upto the trolley on the tramwa overhea pressure being removed from the utton K at the moment of closing in order to lock the two drums together and insure the winding in of both ropes at the same rate. The operator nextpropels thelracking-lever H to a vertical, "which releases the racking-drum brake, and then by a further pro ulsion the controller may be actuated and t e rackingdrum motor M started. The trolley and its suspended bucket is in this manner traversed along the tramway to the proper point for discharge, whenthe operator has but to rei all that is required for its return to-the controlled drums to said shaft, and eac verse his previous movements LU accomplish sup- lyoint. p W hat I claim, and wish to secure by Letters Patent, is

1. In a doble drum for overhead tramways, the com ination, with a drive-shaft of a hoist-drum and motor mechanism for driving the same, of a bucket-sustaining drum, and suitable means, respectively, for clutching said drums, one to the other, which means are controlled b a circuit-breaking apparatus on a handever provided for. the pose, and a solenoid o eratively relate to the same, together witli suitable means for clutching said hoist-drum to said shaft, the said means being controlled by an electric circuit connected with said hand-lever, which is made and broken according as said lever is reciprocated, substantially as shown and described.

2.. In combination with an overhead tramway system for hoisting and conveying, a hoist-drum, and a bucket-sustaining drum mounted on a shaft, adapted to drive the same when actuated by an electric motor provided for the purpose, suitable means for, re s ectively, clutching one of said drums to said sllaft, and each to the other, one of the means so rovided, and said motor, being y a circuit-breaking hand-lever containing a second circuit-breaking apparatus that controls the other of said means,

-together with a suitable actuating appliance for said latter means on said lever accessible to the o erators grasp, substantially as shown an describe 3. In a double drum for overhead tram- Wa s, the combination, with a drive-shaft and an electric motor for driving the same, of a hoist-drum and a bucket-sustaining drum, suitable means for elutchin one of said l to the other,

when electric circuits, with which each is connected, are made, switches in said circuits, and solenoids to operate the same, a lever-arm so related to the circuits of said motor and shaft-clutching means as to enable said circuits to be successively made and broken and said solenoids to be operated according as said lover is reciprocated, the said lever being also rovided with an appliance in or on the han le thereof to break the circuit, with which it is connected, that actuates said means for clutching said drums together, substantially as shown and described. 4. In a double rum for overhead tramwa s, the combination with a drive-shaft an an electric motor for the same, of a hoistdrum and a bucket-sustaining drum, suitable means for clutching one of said drums to said shaft, and each to the other, when an electric circuit with which they are connected, is made, a lever-arm so related to the cir-.

cuits of said motor and shaft clutching mounted on a shaft, adapted to drive the same, when actuated by an electric motor provided for the purpose, suitable means for respectively clutching one of said drums to said shaft and each to the other, one of themeans so controlled containing a second circuit-breaking apparatus that controls the other of said means, together with a suitable actuating appliance on said lever for the same, substantially as shown and described. I

6. The combination, with an overhead tramway, of a drive-shaft and actuating electric motor therefor, ahoist-drum andbucket sustaining drum on said shaft, provided with suitable means for clutching one of said drums to said shaft, and each to the other, when an electric circuit, with which each is rovided, and said motor, being y a circuit-breaking hand-lever electric circuit with which it is connected, is

made, a bucket -'sustainin with a suitable device for c utching the same to said hoist-drum, when an electric circuit with which it is connected, :is made, together with a-hand-lever arranged to make and break successivelyelectric circuits connected with said motor and said hoist-drum device when said lever is reciprocated, and, also,

drum provided carrying an apparatus to make and break the electric circuit connected with said bucket-sustaining drum, substantially as shown and described.

ALEXANDER E. BROWN.

In presence of A. M. MERRYWEATHER, MELVIN PATTISON.