US761959A - Hoisting-machine. - Google Patents

Description

No. 761,959. PATENTED JUNE 7, 1904 A. 5. HANDY.

HOISTING MACHINE.

- APPLICATION FILED we. 11. 1903 no xomzn.

2 SHEETS-#HBET 2.

I I 3mwvtoz b wwmooeo No. 761,959. 7 Patented June 7, 1964.

UNITED STATES PATENT OFFICE.

ARTHUR E. HANDY, ()F PROVIDENCE, RHODE ISLAND, ASSIGNOR TO THE RHODE ISLAND ELEVATOR AND MACHINE COMPANY, OF PROVIDENCE, RHODE ISLAND, A CORPORATION OF R-HODE ISLAN HOISTINGV-IVIACHIN'E.

SPECIFICATION forming part of Letters Patent N 0. 761,959, dated June '7, 1904.

' Application filed August 11,1903. Serial No. 169,105. gNo model.)

. T all whom y U/007%: a modification adepending linger on the lock- Be it known that I, ARTHUR E. HANDY, a ing-lever to engage and operate the Ibokingresident of the city of Providence, in the bar instead of the cam. Fig. 6 is a detail county of Providence and Stateof Rhode front elevation showing one frame as partly 5 Island, have invented certain new and useful broken away, the locking bar projecting Improvements in Hoistingl\Iachines; and I through it and engaging the lever on the outdo hereby declare that the following is a full, side. clear, and exact description thereof, reference Referring to the drawings, A is the base, to 5 5 being had to the accompanying drawings, and which the side frames B B are bolted.

10 to the letters of reference marked thereon, C is the drum-shaft, journaled ineccentrics which form a part of this specification. D D, said eccentrics mounted to turn in bear- This invention relates to hoisting-machines, ings in each frame.

and has for its object the construction of. a 'FF are two friction-wheels mounted on and machine for hoisting which has a drum mount fixed to the shaft C on either side of the drum [5 ed on eccentrics to be operated by a lever and E, which drum is held to move with and on thrown alternately in and out of frictional the shaft. Said friction-wheels are held to be contact with driving-rolls and a brake-shoe. thrown alternately into and out of engage- This hoisting-drum is locked automatically, ment'with corresponding friction drive-rolls 6:

making it impossible forsaid drum to turn G G and the brake-shoes H. These brake- 20 back and drop the load while the fr-ictionshoes are mounted on the rod H on either wheels are being transferred from the fricside of the machine and in a position to ention holding-shoe to the friction driving-rolls. gage each of the friction-wheels, said rod H Thishoisting-machine is so constructedthat being adjustably held at its ends in each the power-transmitting mechanism is directly frame. The friction-rolls G G are mounted 25 connected to and operated by an electric moon and fixed to shaft r which is journaled in tor,.-which motor is automatically controlled each frame. This shaft g is driven by the in its action by the movement of the drumelectric motorIthrough the pinion J and gear operating lever and is called into action only K. The operating-lever R is made in a U when it is desired to turn the drum in the dishape with its ends extending around on each 30 rection necessary to wind up or hoist the load, side of the machine and connected to each the motor not being required to run when the eccentric D, which project beyond the frames load is lowered. on either side. The loop of the lever extends Theinvention is fullydescribed in this speciout in front of the machine, to which the op fication and illustrated in the accompanying crating-cord R is connected.

3 5 drawings. l The lock controlling or lowering lever W Figure 1 is a plan view of the machine. is formed into a U shape and extends around Fig. 2 is, a side elevation showing the lockthe machine similar to that of the starting-leing mechanism and operating-lever partly verR. (SeeFig. 1.) Itispivoted at both ends broken away to show the electrical contactat w to the frame B and has cams w w fixed 40 pieces. Fig. 3 is a detail of the insulated conat its pivoted ends. This lever W is located tact-arm thrown down, forming a connection below the lever R and is arranged to engage between the contact-pieces, in position to com the latter when it is raised for the purpose of plete the circuit and energize the motor. Fig. unlocking the drum and allowing itto unwind 4 is a detail of a portion of the locking-lever, and lower the load.

45 showing the cam attached thereto, which cam The arm V is for the purpose of carrying controls the movement of the locking-bar. the locking-bar V and keep it in the proper Fig. 5 is a detail side elevation showing as relation to the friction-wheelsFF, with which itcomesin contact. Thisarmishungatoneend to the drum-shaft C and pivoted to the frame B at its lower end through a slotted hole, which allows said arm an endwise movement to follow the movement of the driven rolls F F when carried by the cams D D. In this arm is a transverse tapering slot V, in which the locking-loar V works. When the lever W is lowered, the natural tendency of this round bar V is to roll down the inclined surface of the slot V by gravity and wedge between the periphery of the driven rolls F and the lower side of the slot, thus effectually preventing the drum, which is connected to the same shaft as the friction-wheels, from turning back in the direction of the arrow and lowering the load.

a is the dog-actuating pin, which projects inward through the lever B to engage and operate the dog M and throw the contactarm to make and break the connection to the driving-motor, the upper ear on being set off at such an angle to the lower ear m that it is impossible for the lever B to be raised way up, which is the position required to bring the frietion-wheel F in contact with drivingrolls G G, without throwing the dog M and contact-arm L into the contact-fingers N N, as illustrated in Fig. 3 and also in dotted lines in Fig. 2, which position completes the circuit and starts the motor. Itis almost impossible to drop the lever from this position Without reversing the movement of the dog drawing the arm L from the contact-plates N N and stopping the motor. This contactarm L and dog M are pivoted to the frame at i, the arm being connected to the dog M through insulating-pieces Z. At 0 is a doublespring finger which receives and retains the lever when drawn out of the contact-fingers N N and thrown up by the movement of the leverR as it is lowered from its raised position.

The operation of the machine is further explained, as follows: The hoisting-drum and the larger friction-wheel connected thereto are eccentrieally mounted in the frames to be operated by a lever and thrown into and out of engagement with either the driving-rolls Gr Gr to wind up the drum or thrown against the shoe H and held with sufficient pressure to hold the load and prevent the drum from turning back.

In this class of hoisting-machine it has been customary to construct the machine so that during the time the large friction-wheels are being carried by the hoisting-lever from the friction holding-shoe H to small driving-rolls and back again the drum is entirely free to turn back and drop the load which is its purpose to hoist and hold. In using a machine of this character acareless operator or a slight catch in the controlling-rope has often allowed the load to fall, causing serious damage. By the use of my automatic locking device the danger of dropping the load is entirely obviated, as the hoisting-drum is never released except when the load is desired to be lowered. In using this locking attachment .I employ two controlling-ropes, one for hoisting and one for lowering. When it is desired to hoist, lever It is raised and the friction-wheel F is transferred from the holding-shoe H to the driving-rolls G G. By the arrangement. of the lock roll or rod V the drum may turn forward, but is held from turning backward by the wedging of the roll against the periphery of friction wheel F. When the load has been raised, the lever B is dropped and the friction-wheels return to the friction holdingshoes H. hen it is desired to lower the load, the lever \V is raised, which draws the locking-roll V out of contact with the friction-wheel F by the pressure of the cam or finger V against it. The lever \V continues upward until it engages the lever R, which it also draws upward, raising the friction-wheels F F from the holding-shoes H II, and the load is allowed to descend at the will of the operator. The current to the motor comes in on the wire 1, and when the contact-arm L is down and the circuit is completed between the lingers N and N the electric switch '1 is energized, drawing up the bar 1' against the points (a a, and the circuit is completed, the motor energized, and the friction drivingrolls revolved.

I construct my machine with two large friction-wheels FF and a corresponding number of small friction (l1'lVO-l'OllS(i (i to increase the efficiency of the machine.

It is considered of great practical advantage to have this hoisting mechanism connected to and driven direct by an electric motor and have this motor controlled automatically by the movement of the drum-operatinglever R, this motor being called into action only when it is desired to hoist the load, being at all other times entirely disconnected from the drum and also from the electric current.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a hoisting-machine the combination of a hoisting-drum, friction-wheels eccentrically mounted, friction holding-shoes arranged to engage the periphery of said wheels, l'rietion driving-rolls also arranged to engage the periphery of said wheels, means including eecentrics for transferring said friction-wheels alternately from said shoes to said drivingrolls, means for automatically energizing a motor to rotate said driving-wheels and drum to hoist the load when said wheelsarebrought in contact with said rolls, substantially as described.

2. In a hoisting-machine, the combination of a hoisting-drum, friction-wheels eccentrically mounted, friction holding-shoes arranged lOO 3. In a hoisting-machine, the combination of a hoisting-drum, friction-Wheels eccentrically mounted, frictlon holdlng-shoes arranged to. engage the periphery of said Wheels, friction driving-rolls also arranged to engage the periphery of said wheels, means including eccentrics for transferring said friction-wheels alternately from said shoes to said drivingrolls, means for automatically locking said drum While being transferred between said shoes to said driving-rolls, means for auto- 'matically energizing a motor" to rotate'said driving-wheels and drum to hoist the load when said wheels are brought in contact with said rolls, substantially as described.

4:. In a hoisting-machine, the combination of a hoisting-drum, friction-wheels, friction holding-shoes arranged to engage the periphery of said Wheels, friction driving-rolls also arranged to engage the periphery of said wheels, eccentrics in which said wheels are mounted, an operating-lever engaging said eccentrics by which they are turned to move said wheels alternately into and out of engagement withsaid shoes and said driving-rolls, a contact-arm, contact-finger, means for throwing said arm into and out of engagement with said lingers to make and break the circuit for the purpose of starting and stopping a drivingmotor when said lever is raised or lowered respectively.

5. In a hoisting-machine, the combination of a hoisting-drum, friction-wheels, friction holding-shoes arranged to engage the periphery of said wheels, friction driving-rolls also arranged to engage the periphery of said wheels, eccentrics in which said wheels are mounted, an operating-lever engaging said eccentrics by which they are turned to move said wheel's alternately into and out of engagement with said shoes and said driving-rolls, a contact-arm, a dog connected to said contactarm, contact-fingers, a pin in said operatinglever to engage said dog and throw said arm into and out of contact with said fingers by the movement of said lever up and down, thereby making or breaking the electric circuit to stop and start an electric driving-motor, substantially as described.

6. In a hoisting-machine the combination of a hoisting-drum, friction-wheels, friction holding-shoes arranged to engage the periphery of said wheels, friction driving-rolls also arranged to engage. the periphery of said wheels, eccentrics in which said wheels are mounted, an operating-lever engaging said said wheels alternately intoand out of engage- .ment with said shoes and said driving-rolls, a

contact-arm, contact-fingers, means for throwing said arm into and out of engagement with said fingers to make and break the circuit for the purpose of starting and stopping a driving-motor when said lever is raised or lowered respectively, means for automatically locking said drum while'being moved between said shoes and said driving-rolls, substantially as described.

-7. In a hoisting-machine, the combination of a hoisting-drum, friction-wheels eccentricall y mounted, friction holding-shoes arranged to engage the periphery of said wheels, friction driving-rolls also arranged to engage the periphery of said wheels, means including eccentricsfor transferring said friction-wheels alternately from said shoesto said drivingrolls, a roll lock-bar arranged to engage and be wedged against the periphery of the fric-' of a hoisting-arm, friction-wheels eccentrically mounted, friction holding-shoes arranged to engage the periphery of said wheels, friction driving-rolls also arranged to engage the periphery of said wheels, means including eccentrics for transferring said friction-wheels alternately from said shoes to said drivingrolls, a gravity-roll lock-bar arranged to engage and be wedged against the periphery of the friction-wheels to hold said wheels from turning in one direction, a controlling-lever, means on the end of said lever by which said bar is drawn out of engagement with said wheel, substantially as describec. V

9. In a hoisting-machine, the combination of a hoisting-drum, friction-wheels eccentrically mounted, friction holding-shoes arranged to engage the periphery of said wheels, friction driving-rolls also arranged to engage the periphery of said Wheels, means including eccentrics for transferring said friction-wheels alternately from said shoes to said drivingrolls, means for automatically locking said drum from turning in one direction while being moved between said shoes and said drivsaid drum, means by which said drum is unlocked and said wheels raised from the friction-shoes by the upward movement of said controlling-lever, substantially as described.

10. In a hoisting-machine, the combination of a hoisting-drum, friction-wheels eccentrically mounted, friction driving-rolls arranged to engage the periphery of said wheels, means including eccentrics for moving said frictionwheels into and out of engagement with said IIO II 5 ing-rolls, a controlling-lever for unlocking drivii'ig-rolls, means for automatically locking said drum from turning backward, means for releasing, the lock to lo ve r the load, means for ART] [U h! E HA N DY. automatically energizing a motor to rotate 5 said driving-Wheels and drum to hoist the load When said wheels are brought in contact with In testimony whereof I have hereunto set my hand this 1st day ol August, A. 1). 191K).

in presence of HOWARD E. Bauiiow,

said rolls, substantially as described. E. l. OGDEN.

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