US660685A - Hoist, winding-gear, &c. - Google Patents

Description

No. 660,685. Patented Oct. 30, |900.

' J. C. HDWELL.

HDIST, WINDING GEAR, 4&0.

(Applicztion led Sept. 26, 1899.)

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UNrrED l STATES PATENT OFFICE.

JOHN CHARLES HOWELL, OF LONDON, ENGLAND.

HOIST, WINDING-G EAR, `doo.`

SPECIFICATION forming part of Letters Patent No. 660,685, dated October 30, 1900. Application led September 26, 1899. Serial No. 731,736. (No model.)

To all whom it may concern.-

Beit known that LJ CHN CHARLES HOWELL, a subject of Her Majesty the Queen of Great Brit-ain, residing at London, England, have invented a certain new and useful Improvement in Hoists, Vinding-Gear, and the Like, of which the following is a specication.

Thisinvention relates to a certain improvement in hoists, winding-gear, and the like, the object of the invention being to provide a compact and handy hoist or the like capable of being operated from au electric motor through a reducing-gear and so arranged that the hoist or the like may be self-sustaining as to its load and that the motor may be capable of being started without any load, which can be afterward gradually put on.

The invention is illustrated in one form in the accompanying drawings, which represent, 1n-

Figure l, an elevation, partly in section, of the motor, red notion-gear, braking and driving rings, and hoisting-drum, and in Fig. 2 a detail sectional view of the lower portion of the controlling-lever, &c.

In the drawings, a represents an electric motor; b, the reduction-gear; c, the braking and driving rings, and CZ the hoisting-drum.

The reduction-gear b is of the class described in Letters Patent of the United States granted to Thomas Humpage on the 11th of July, 1899, under No. 628,469, and consists of a bevel gear-wheel B, carried by the fast-running shaft ct of the motor, a bevel gear-wheel D, loosely mounted on a stud at an angle to said Wheel B and gearing therewith, and a stationary gear K, secured to the coverplate ZJ of the gear-casing b2. The gear D carries a gear E, fixed to it or forming part of same and both run freely on the stud, which is in turn carried by a spindle bs, which can turn freely in the fast-running shaft a and in the slow-running shaft b4, which carries a bevel gear-wheel M, engaging with the bevelgear E. The wheels E and D are duplicated, as shown, to secure a better balance for the gear. The shaft b4 carries a driving disk or ring c', between which and a similarly-shaped braking disk or ring c2 is situated a togglearm c3, having two friction holding-faces c4 c5, one being adapted to engage with the interior surface of the driving-disk c and the other with the interior surface of the brakingdisk c2 alternately. The toggles c3, of which there are preferably a set arranged on opposite sides of the shaft d of the drum d, arepivotally att-ached to a boss d2 on the end of said shaft and are provided with a projection or rounded nose c6, which separates the two disks and the rounded surfaces of which Work against the edges of the disks when the toggles are rocked, the object of the device being to support and steady the toggles at their outer ends. The disk c2 is fixed-in some suitable Way, as by bolting, to a lug c7 on one of the bearing-pillars.

The shaft d' is supported in bearings e c and is capable of longitudinal movement therein. The drum d is secured on such shaft, or the shaft mayslide in the drum, so long as it is capable of turning it, and said shaft is provided with a collar cl3, which is partly embraced by the operating-lever f. This lever is bolted to a disk g, which is provided with cross-slots g', by which the lever may be set in dierent positions according to the position in which the hoist is fixed. The lever maybe operated by a rope or chain, so that it l may be worked from adistance. The disk g is provided with a stud or shaft g2, journaled in a bearing-block g3, and to the end of the shaft an arm h is rigidly connected. The arm h projects into a hollow base-plate t', and toit is connected one end of a spring k, the other end of which is secured to a hook Z, bolted to a block m, secured to the base or otherwise attached to some fixed point. The pull of this spring forces outwardly the end of the lever f, embracing vthe collar d2 of the drum, th us moving the drum to the right, with the result that the faces c5 of the toggles c3 are pressed against the inside of the brake disk or ring c2 and the drum is held, this being the` normal position of the parts, so that a load carried by the drum maybe sustained at any point,which is of advantage in the event ofa breakage of any part of the driving mechanism.

The driving mechanism, which includes the disk or ring c', may be kept constantly running, if desired, and to put the hoistin action the lever is pushed over, so as to remove the face c5 from disk c2 and put the face c4gradually into contact with the rotating disk or ring o. To lowerfthe load,the same operation is performed, but thel lever i1s= only put over sufficiently far to partly release the face c5 of the toggle from the braking-disk, by which means the load can be gradually lowered, the operator keeping the same Well under control by increasing the braking action when desired. n

What I claim is- In a hoist the combination with a reductiongear and a drum of a part driven through the gear a fixed part separated from the irst a shaft on which the drum is supported means for shifting said shaft longitudinally toggles carri-ed by saidshaft and friction-faces on said toggles adapted to be brought'into contaet alternately with the driven part and the fixed part substantially as described.

In testimony whereof I have hereunto set my hand inI the presence of two subscribing zo Witnesses:

ALLEN PARRY JONES, H. LoUs CLARK.

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