US840129A - Hoisting-machine. - Google Patents

Description

PATENTED JAN. 1, 1907.

A.'.E.HANDY.

HOISTING MACHINE.

APPLICATION FILED MAR.27, 1906.

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UNITED/ STATES PATENT -o FIon.

Aernua i nwian HAN-DY, on Pnovmnnon, 'RHODEYIS'L'AND, ASSIGNOB To RHODE' ISLAND ELEYATORAND MACHINE COMPANY, OF PROVI- I DE NCE, .RHQDEISLAND, CORPORATION or RHonn ISLAND.

' holsri'uemAoi-lins.

" specification of Letters Patent-.

Patented J an. 1, 1907.

Applioation filed March27,il906. Seriallfhts .3031252- To o/ll whom it ma concern."

san it known that I, ARTHUR EDwARt' HANDY, a citizen of the United States, re-

siding at the cityof Providence, in the county of Providence and State of Rhode Island,-

have invented certain new and useful 1111-. proveinents in Hoisting-Machines, of which the following is a specification, reference being had therein tothe accompanying drawln s.

" lhis invention relates to hoisting-machines, and has for its object the construction of a machine for'hoisting, saidmachi'ne being provided with an eccentrically-mounted drum arranged to be moved-at the will of the operator by'nieans of an operating-lever either to be rotated by engagement with a set of rotating driving-rolls or'moved into engagement with a set of brake-shoes to hold said drum from turning.

A further object of the invention is that this drum shall be driven through suitable gears and friction-rolls by an electric motor,

. also that the motor shallstart slowly and then increase its speed gradually by cutting out resistance step by stop all by theniovement'of one operating-lever.

Another feature of the invention is that a permanent wire connection is made. and maintained from the last plate of the rheostat to the pivot-point of the contact-arm for the purpose of assisting the said contact-arm in conducting the initial current when in its normal position. This permanent wire connection also renders it impossible to get an poor contact of *invention consists of certain novel features of '5: To 1 in section.

for-adjustment. Fig. 5 is a diagram view construction, as will be more fully described,

and particularly pointed out in the appended claiins.

' In the accompanying drawings, Figure l is a pla n view of the hoisting-machine. Fig. 2 is a side elevation of the same, illustrating rollarm, illustrating the supported portion illustrating the wiring arrangements for the hoisting device. I

Referring to the drawings, at I is the frame of the machine, that may be made in any convenient form. At 2 is the drum-shat t journaled in eccentric blocks 3 3, that are mounted to be turned in bearings in each side-of said'frame. The two friction-wheels 4 4 are bolted or otherwise securely fastened one to each side of the winding-drum 5, and then the whole three are mounted on the shaft 2,

to be moved together longitudinally in the I frameby the turning of the eccentric blocks,-

as hereinafter described.

The brake-shoes 6 6 are fixed to the rod 7,

and. thus held in a position to bev engaged b.

the friction-wheels 4 4 when they are set bac 'by the movement of the eccentrics 3 3, and

the ends of the said rod 7 are mounted to be longitudinally, adjusted in slots in the side frames.

1 The driving friction-rolls 8 are mountedon and fixed to shaft 9, which is journaled in each frame. 'This-shaft 9 is driven by the electriemotorlO through the pinion 11 and gear 12. I

Mounted on and fixed to eachof the eccentrics 3 3 on either side of the machine is a frame 15, each of which extends out rearwardly from the center of the eccentric, form ing an car '16, to which the operating-lever is pivoted at 17. The frame then extends upward for a shortdistanceona line-forward of the center of the eccentric, and at its'u er end is formed a cap 18 down through who a set-screw 19 is threaded. A shelf or bracket 20 extends outward from the lower portion of this frame beneath the operating-lever to form a rest or stop for said lever to rest on. At 21 is astiff coil-spring that is su ported on the said operating-lever through '0 e shoe 22 and receives its tension against the same by the adjusting-screw 19 through the me: dium of its upper late 23, against which said screw rests. l lie operating-lever 13 is formed in a U shape, with its ends extendin around to either side of the machine 'an'c pivotally connected at 17, as above stated, slightly in the rear of the center of the eccentric blocks 3 3, and the loop of the lever extends around in front of the machine, andt'o its front portion is attached the operatingcord 14. The spring 21 described and the chine, the action of which springs are hereinafter described. On the forward end of the machine-frame is fixed the startingswitch, that is composed of two spring-- pressed fingers 24- 24, pivotally mounted at 25 on the slate base-plate 26. Connectedto the-operating-lever 13 in a position to engage the said starting-switch fingers 24 is the connecting roll bar' 27, the detail of which is shown in Fig. 3, which bar is for the purpose of making the connection between the two fingers to complete the circuit to the motor. Thls rollbar (see Fig. 3) is constructed of a shell 36- of conducting material mounted to turni're'ely on a core 27 of non-conducting material, both of which are secured to the plate 38 by the bolt 39, said'plate being slotted at 40, near its lower end, to provide for vertical adjustment on the operatingle er. c 4

On the side of the machine frame is mounted the rheostat 28, through which the.

resistance to the motor may be cut out step by step by means of the movement of the contact-arm 29, that is pivoted at 30 to the frame. This contact-arm is connected to the operating-lever through the connections 31, 32, and 33. This latter connection is pivoted at 34 to the said operating-lever at a point directly over the center of the eccentric block 3, so that by the first movement of the said lever to rotate this block and start the motor-there will be no movement of, the

contact-arm to out out resistance.

Another feature of this construction is the wire connection 50, leading i'rom-the pivoting-point of the rhe'ostat-arm to the last plate 51 in the rheostat. Thiswire is made a permanent connection between these two points and serves to assist in conducting the initial current 'when the rheostat-arm is in its normal position. This connection also renders it impossible to get an'open circuit by reason of apoor contact being made by the said rheostat-arm' while in any'position on the rheostat.

The ordinarilyconstructed electricallyoperated hoistin machines of the class described are usual y arranged to startv the load,

at the full speed of the motor, thereby bringing an undue strain on both the motor and .the rest of the machinery. To obviate the lever, t

quick starting of the machine, I have arranged to send the current to the motor through a rheostat, and after-the motor has started to hoist the load the resistance is cut out ste by step by raising the operatingh reby starting the motor slowly and maximum speed. a

. When it is desired to start the machine, the

first thing to be done is to close the cut-out I switch 41 (see Fig. 5,) and then by raisingthe operating-lever 13 the connecting-har 27 'engages both of the fingers 24 24 and completes the circuit to the solenoid 44, which is thus energized to raise and close the main switch 43. The current by this action is then allowed to pass by the way of the wire 52 through the Iheostat 28, arm 29, wires 45 and 46 to the motor 10, which is at oncestarted" 1 slowly. Atthe same time the friction-wheels, 4 4 are brought forward by a continued up-t ward movement of the lever 13 until they engage the driving friction-rolls 8 8, when the drum 5 commences to turn, and slowly hoist the load from the motor,'the current passing through the series field 47 and wire 48 out'through the main switch 43 and cutout 41.

On account of the permanent connection of theirame 15 to the eccentric blocks 3 the first upward motion of the. lever ivoted thereon instead of compressing t e stifl springs 21-natur'ally acts to rotate the blocks,

and thus move the frictiomwheels 4 4 from the friction-shoesto engage the driving friction-rolls 8 8, by which said wheels are started to rotate. The movement of this operat- -ing:lever either up or down so long as the springs 21 arenotcompressed do not affect the rheostat arm. As before stated, the first upward movement of this lever starts the motor, connects the drum thereto through its friction-wheels, 'and'the' load is started slowly to be lifted. Afnrther upward movement of the said lever then com resses the springs 21, sets the friction-whee s harder against the driving-rolls,and also through the connections 33, 32, and 31'. causes the rheostat+arm 29 to rise and cutout the resistance step by step, thus causing the motor to speed up gradual y until the maximumspeed is reached.

When it is desired tojstop the machine, the reverse action takes place. The resistance is first'cut in again to gradually slow down the motor, then the friction-wheels are carried over" against the brake-shoes to hold the load, after which the motor is stopped,

and the whole is'being' done by the movementof but one lever. By the above arrangements the motor is called into action only when it is desired to hoist the load and is at all other times entirely disconnected from the drum by the movement of the eccentrics.

The motor is also-disconnected from theelectric'current by the withdrawing of the connectin -bar 27 as soon as thedrum engages and-is eldbythe friction brake-shoes.

This machine by its practical construction is rendered extremely simple and efi'ective in its operation. I

Having thus described my invention, What I claim as new, and desire to secure by Let-- ters Patent, is' Y 1. In a hoisting-machine, a drum, frictionrolls for driving said drum, a motor for actuating said rolls,'an actuating-lever, means including said lever by the movement of which said drum is operatively connected tovsaid rolls and said motor and drum may be startedz'slowly and speed.

2. In a hoisting-machine, a drum, fixed friction-shoes, rotatable driving means,- means for moving said drum whereby-it will be released from said, shoes to be engaged and rotated by said drivii g means, a motor for rotating said driving means, an operating-lever, and means whereby the movement of said lever shall start the motor, cause the drum. to rotate and subsequently accelerate the speed of the motor.

3. ,In a hoisting-machine, a drum, fixed friction-shoes, rotatable driving means, means for moving saiddrum whereby it will be released from said shoes to be engaged and rotated by said driving means, an electric subsequently accelerated in motor for rotating said driving means, a rheostat placed in-the electric circuit, an operating-lever, and means whereby the movement of said lever in one direction shall first start the motor then. releasethedrum from the brake-shoe to be rotated by saidmot'or and subsequently accelerate the speed of said motor and drum by cutting out the resistancein' the rheostat.

4. In a hoisting-machine, a drum, fixed" frictionshoes, rotatable driving means, means formoving said drum whereby it ,will be released from said shoes to be engaged and rotated by said drivin means, an electric motor for rotating said riving means, arheo stat placed in the electric circuit, an operating-lever, and means whereby the movement of said lever in one direction willfirstcause the'motorto start and then move the drum to be rotated by the driving means, and means for cutting out the resistance in the rheostat increase its speed.

step by step to cause said motor to gradually 5. In a hoisting-machine, a drum, fixed friction-shoes, rotatable driving means, means for moving said drum whereby it will be released from said shoes to be engaged and rotated by said driving means, an electricmotor for rotating said driving means, a rheostat placed in the electric circuit, an operating-lever, means actuated by. said lever for.

completing the circuit to start the mo tor, and. means connected to said lever whereby the rheostat-arm will be actuated to cut out the resistance step by step after the current has been completed to start the motor and the drum connected thereto. a

6. In a hoisting-machine, a drum mounted in eccentrics, fixed friction-shoes, rotatable driving means, means for. moving'said drum whereby it will be released from said shoes to be engaged and rotated by said driving means, an electric motor for rotating said driving means, a rheostat laced in the electric cir cuit, an operatingever pivotally connected to said'eccentrics, a yieldable connection also continue to rise after said eccentrics have engagement with said driving means, and means whereby the continued upward movement of said lever cuts out the resistance in the rheostat to speed u the motor.

7. Ina hoisting-mac in eccentrics, fixed friction-shoes, rotatable tated by said driving means, an electricinotor for rotating said driving means, a rheostat placed in the electric circuit, a frame connected to each eccentric, an operatingthe rear of the eccentric centers, springs in said frames resting on said lever whereby said lever is allowed to continue to rise after said eccentrics have been turned to bring the drum into-rotatable engagement with said driving means, and means whereby thecontinned upward movement of said lever cuts out the resistance in the rheostat tospeed up the motor.

in eccentrics, fixed friction-shoes, rotatable tric, an operating-lever pivotally connected centers, springs in said frame resting on said lever forward of said eccentric centers, a condirectly over the center of the eccentric when said lever is in its normal position, whereby the first raising of said lever starts the motor and rotates said eccentric, and a further-u ward movement of said lever compresses t e spring, and raises said rheostat-arm to cut out the resistance step by step.

9. In a hoisting-machine, a drum mounted in eccentrics, fixed friction-shoes, rotatable driving means, means for moving said drum whereby it will be released from said shoes to be engaged and rotated by said driving means, an electric motor for rotating said driving means, a rheostat placed in the elecconnection in said rheostat to assist said arm in carrying the current, an operating-lever, and means whereby the movement of said lever in one direction will first cause the motor to start and then move the drum to be rotated by the driving means, and means for cutting out the resistance in the rheostat step by step to cause said motor to gradually increase its s eed.

10. In a oisting machine, a hoistin drum, friction-Wheels eccentrically mounteil, frictiondriving-rolls arranged toengage the on said leverwhereby the same is allowed to lever pivotally connected to said frames 1n 8. In a hoisting-machine; a drum mounted a 9 driving means, means for moving said drum to said frames in the rear of the eccentrictric circuit, a rheostat-arm, a permanent wire" been turned to bring said drum into rotatable e, a drummounted driving means, means to be engaged and ro- 95 tric circuit, a frame connected to each eccen- KOO 'nection to said rheostat pivoted to said lever -,periphery of said wheels, means including an operating-lever and said eccentrics to move said fr ction-wheels into and out of engage- 7 "merit w'vi-t-h sa id driving-rolls and said friction- ";shoes, 'a;nd n1ea1rs whereby one movement of said leverwill start the motor, connect the dnvnig-drunrthereto and subsequently acio tion of a 01 1 fcntri'cally nOu-n'ted, friction holding-shoes cele'ra't'e the speed of'the motor. I "1 111- 111- '*hoisting machine, the combina- 's'ting'-'dru1n,' friction-wheels ecerial-aged: -to -e1j1ga ethe periphery of said --wheelsgfriction-"drivin rolls also arranged .o en'gage-the periphery of said wheels, means neat-the drum thereto and subsequently cut "ibut tlieresistancc from the rlreostat step by step ,t o"'-"increasethe speed of the motor.

'1'23In;a"hoisting machine, a drum, fixed -fr'icti'o1'I-shoes, means including friction defilivei'y rol'lsfor rotatin'g said drum, means whereby, said drum may be moved to be engaged-and rotatedby said rotating means and also moved to engage and be held by the said friction-' shoe's, a driving motor and nej'ans fors'tarting'a'nd stopping said motor (gag ed and rotated by said rotating means and also moved to'engage'and be held by the saidfriction--shoe's,- meal-1's in cluding friction de- ,livery rolls/fiorrotating said drum, means I "whereby saiddruln'may be moved to be enin presence of two witnesses.

' "friction-shoes, and means whereby the hoistlug-drum m'ay becaused to start the load :Slo'wlyfand be graduallyincreased to its maxif mum speed, and means whereby said drum and load may be caused to stop gradually,

14. In a hoisting-machine, a drum, fixed friction -shoes, rotatable driving means, means formoving said drum wherebyitwill be released from said shoes to be engaged and rotated'b'y said driving means, "a motor for rotating said driving means, an operatinglever, means whereby anupward movement of said lever shall start the motor, cause the drum to rotate and subsequently accelerate the speed of the motor, and means whereby when said lever is returned the speed of the motor is first reduced, the drum detached from the rotary means to beheld by said shoes and finally the motor stopped.

15.' In a hoisting-machine, a drum fixed friction shoes, rotatable driving means, means for moving said drum whereby it will be released from said shoes to be enga ed and rotated by said driving means, an e ectric motor for rotating said driving means, rheostat placed in the electric circuit, an operating-lever, means whereby the movement of said 'lever in one direction shall first start the motor then release the drum from the brake-shoe to be rotated by said motor and .subsequently accelerate the speed of said motor and drum by cutting out the resistance in the rheostat, and means whereby the return movement of said lever shall first cut the resistance into the rheostat'to reduce the speed of the motor then return the drum from the a driving means to engage said shoes and finally stop the motor. a

In testimony whereof- I affix my signature ARTHUR EDWARD HANDY. Witnesses:

I-IowARn E. BARLOW, v E. I. OGDEN.

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