US818078A - Electric hoist. - Google Patents

Description

No. 818,078. PATENTED APR. 17, 1906.

P. J. DARLINGTON. ELECTRIC HOIST.

APPLICATION FILED DIS-0.19. 1904.

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P. J. DARLINGTON.

ELECTRIC HOIST.

APPLICATION FILED 13110.19, 1904.

2 SHEETSSHEET 2 Mum z frde razor! full '0 fkz iz' PHILIP J. DARLINGTON, OF CHICAGO, ILLINOIS.

ELECTREO HOIST.

Specification of Letters Patent.

Patented April 17, 1906.

Application filed December 19,1904. Serial No. 237.425.

I!) all whom zit may concern:

Be it known that I, PHILIP J. DARLINGTON, a'citizen of the United States, residing at Chi- ('ago, in the county of Cook and State of Illinois, have invented a certain new and useful improvement in Electric Hoists, of which the following is a full, clear, concise, and exact description.

My invention relates to electric hoists, and has for its object to provide an improved structure which will be compact and efficient in operation with which the maximum amount of power may be obtained, while the minimum amount of head-room is occupied.

My invention consists, broadly, of an electric hoist having a hoisting-drum with a suitable housirg or frame therefor, together with a motor mounted outside the housing upon one of the end walls thereof and having a shaft extending within the housing external to the drum, the drum and motor shafts being connected by reduction-gearing mounted on the other end wall of the housing. An. electric hoist so corstructed and assembled will occupy the greatest amount of space in a horizontal direction or in the direction of its width or length, so that its height or amount of head-room will be made small.

Other featureslof the invention. relate to the manner. of supporting the motor-shaft.

and reduction-gearing to the means for controlling a load retaining clutch and to the construction of the hoist-frame or housing, whereby it may support trolley-wheels at its sides or top, as desired, in order to use the hoist with tracks of different type.

I will describe my invention particularly by reference to the accompanying drawings, wherein Figure 1 is a vertical sectional view of an electric hoist embodying my invention, and Fig. 2 is an end view thereof.

The same letters of reference indicate like parts wherever used.

The hoistingdruma, which is adapted to wind up the cable to lift a load carried by the hook a, is mounted in a housing or frame I), the horizontal shaft a of the drum being j ournaled in the vertical end walls of the housing. A motor 0 is mounted on the outside of the housing on one of the end walls thereof, the shaft 0 of the motor extending within and through the housing external to the drum (1 and being connected with the drum-shaft a by reduction-gearing G, placed at the end of the housing opposite the motor 0. Preferably the gearing is mounted on the outer surface of the end wall of the housing opposite the wall supporting the motor, being protected by a cover Z), secured to said first-mentioned'wall. Said gearing may comprise a pinion d, rigidly mounted upon the motorshaft and meshing with a gear-wheel d, screwed upon a threaded shell d carrying a pinion. (1 the shell being loosely mounted upon the drum-shaft. The pinion d meshes with a gear (1 loosely mounted upon the motorshaft and rigidly secured to a pinion d also loosely mounted upon the motor-shaft and meshing with a gear d, rigidlymounted upon the drum-shaft. The motor-shaft c is journaled in a quill 6, supported by the housing or frame. A number of the reductiongear members are rotatably mounted upon said quill'as, for example, gear (1 and pinion d which forms a convenient support therefor.

A load-retaining friction-ratchet brake is provided and comprises a ratchet-wheel f, loosely mounted upon the shell d between an annular collar 9, rigidly secured to the shell and the laterally-projecting side of the gear d,which is loosely screwed upon the threaded shell. The operation of the brake is controlled by a spring-actuated pawl 72, engaging the teeth of said ratchet-wheel f, the pawl being mounted upon the cover 12', preferably upon the inner surface thereof. As the drum is rotated in a direction to lift the load carried by the cable the pawl h slips over the teeth of the ratchet f, but when the movement is reversed for lowering the load, if the motor exerts suflicient effort, the gear d, mounted upon the screw-threaded portion of the shell d draws away, thus freeing the ratchet-wheel f, allowing said ratchet-wheel to remain stationary during the descent of the load. In case of the load tending to drive the motor, however, the gear (1 binds against the ratchetwheel f, locking it-securely between the collar g and the gear (1, and said ratchet being thus locked and held against rotation by the spring-actuated pawl h will prevent a lowering movement of the drum.

The frame or housing is so constructed as to support trolley-wheels at its sides or top, as desired, so that the hoist may be employed with tracks formed by a single rail located above the hoist or tracks comprising two rails located on opposite sides of the hoist, as shown in dotted lines in Fig. 2. As shown, the housing carries upon its top or crown a pair of trolley-supporting brackets and may be provided with trolley-supports upon its side walls, which may consist of a pair of trolley-shafts passing through both side Walls and supported thereby. With this arrangement the trolley-wheels may be mounted either upon the brackets or side sup orts, as desired. A motor i may be carrie by the frame to drive the trolley-wheels upon the tracks.

I claim 1. In an electric hoist, the combination with a hoisting-drum, of a housing therefor in the end walls whereof the horizontal drumshaft is journaled, a motor mounted outside the housing upon one of the end walls thereof with its shaft passing through the housing external to the drum, and reduction-gearing supported on the other end wall of the housing and connecting the drum and motor shafts; whereby a powerful hoist is obtained occupying small head-room.

2. In an electric hoist, the combination with a hoisting-drum, of a housing for said drum in the walls whereof the shaft of the drum is journaled, a motormounted on the outside of the housing with its shaft extending therein external to the drum, a guill supported by the housing in which sa'i shaft is journaled, and reduction-gearing supported at one end of said drum and connecting the drum and motor shafts, a portion of said geafling being rotatably mounted upon said ui I q 3. In an electric hoist, the combination with a hoisting-drum, of a housing therefor, a motor carried by the housing for driving said drum, and trolley-wheels provided with supports, the sides and to of said housing being adapted to carry sai supports; Whereby the hoist may be interchangeably employed upon overhead and side tracks.

4. In an electric hoist, the combination with a hoisting-drum, of a housing therefor, in the vertical walls whereof the drum-shaft is journaled, a motor on the outside of said housing with its shaft extending therein, re-

duction-gearing mounted u on the outer surface of one of said end wal s and connecting the drum and motor shafts, a cover for said end wall, a load-retaining friction and ratchet brake, associated with the hoistingdrum and motor, and a spring-actuated pawl mounted upon the said cover and controlling said brake.

5. In an electric hoist, the combination with a hoisting-drum, of a housing therefor, a motor carried by the housing for driving said drum, trolley-wheels and tracks there.

therefor, and supports carried upon the sides of said housing or frame adapted to support said Wheels.

7. In an electric'hoist, the combination with a hoisting-drum, of a housing therefor, in the vertical end wallswhereof the drumshaft is journaled, a motor mounted on the outside of the frame with its shaft extending therein external to the drum, reduction-gearing supported at one end of the drum, said gearing connecting the drum and motor shafts, and trolley-wheels with their supports, the top and sides of said housing being adapted to carry said sup orts.

In witness whereof I iereunto subscribe my name this 16th day of December, A. D.

PHILIP J. DARLINGTON. Witnesses:

WINFIELD W. LEAcH, IRVING IVIAODONALD.

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