US769232A - Take-up device for hoisting-buckets. - Google Patents

Description

No. 769,232. 7 PATENTED SEPT. 6, 19 I E. B. PERRY & W. BASSETT.

TAKE-UP DEVICE FOR HOISTING BUCKETS.

' APPLIGATION FILED MAY 23, 1904- N0 MODEL. a SHEETS-SHEET No; 769,232. PATENTED SEPT. 6, 1904. E. B. PERRY & W. BASSBTT. TAKE-UP DEVICE FOR HOISTING BUGKETS.

APPLICATION FILED MAY 23, 1904.

3 SHEETS-SHEET'Z.

Y N0 MODEL.

WITN ESSES:

INVENTOR ATTORNEY No. 769,232. PATENTED SEPT. 6, 1904.

E. B. PERRY & W. BASSETT. S I TAKE-UP DEVICE FOR HOISTING BUOKETS.

APPLICATION FILED MAY '23. 1 4- 8 SHEETS-SHEET 3.

no MODEL.

fiffimoa i WITNESSES:

- ATTORNEY UNITED STATES Patented September 6, 1904.

PATENT OFFICE.

ERNEST B. PERRY AND WILLIAM'BASSETT, OF BAY CITY, MICHIGAN, ASSIGNORS TO INDUSTRIAL WORKS, OF' BAY CITY, MICHIGAN.

TAKE-UP. DEVICE FOR HOISTING-BUCKETS.

SPECIFICATION forming part of Letters Patent No. 769,232, dated September 6, 1904.

" Application filed May 23, 1904. Serial to. 209,350. (No model.)

hereby declare'the following to be a full,v clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains to make and use the same. This is a device for steadying hoisting-buckets of cranes and like machines, and pertains more particularly to means for preventlng rotation of the bucketwhile being hoisted and consequent twisting of the hoisting ropes or cables.

The invention consists in certain mechanisms designed to attain these results.

The apparatus is attached to the hoistingshaft or other suitably-located revolving part of the hoisting mechanism.

The invention consists in the devices illustrated in the accompanying drawings, in which I I Figure 1 is a side elevation of a locomotivecrane to which our invention is applied. Fig, 2 is a vertical section broken away in part, the section being'taken parallel with the axis of the hoisting-shaft. section taken on the line y y of Fig. 2. Fig. 4 is a top plan view, of the parts shown in Fig. 2, the brake-band being omitted. Fig. 5 is a detail of the bracket that supports one of the pawls. Fig. 6 is avertical section on the line m m of Fig. 2; showing the relative arrangement of the ratchet-wheels that control the movement of the bucket-steadying cable.

As is clearly shown in the drawings, the invention consists in the following -elements: A drum 1 is revolubly mounted on the hoisting-shaft 2 or other suitably-revolving shaft- 'of the hOisting engine, and to the drum-is secured the steadying-cable 3, the outerend of which is secured to the hoisting-bucket I. The cable 3 may be guided in any suitable manner, as by means of an idler-pulley 5, ca r' ried by the crane-jib. When the bucket is Fig. 3 is a vertical lowered, the cable 3 pays out from the drum 1, which revolves loosely on its shaft. Its revolution is retarded, however, by means of a band-brake 7 carried by a brake-face 7 on the drum. The'ends of the band-brake are mounted on the face of the ratchet-wheel 8, which is mounted to revolve freely on the shaft 2. To prevent rotation of the wheel 8 while the cable 3 is being paid out and to thereby bring into action the resistance of the brake 7, we provide the pawl, 9', adapted to engage the teeth of the ratchet 8 and prevent its rotation while the cable is being unwound from the drum.

the machine-frame. One end of the brakeband 7 passes through a lug carried by the wheel 8, and has at its end a nut 8". Between the nut and the lug 8 is a compressible spring 8, the tension of which maybe regulated by the nut, thereby increasing or decreasing frictional resistance between the brake-band? and the drum 1, and consequently increasing or decreasing the maximumpull that can be exerted by the drum while the bucket is being lowered. In practice this resistance is adjusted to keep the bucket steady under normal conditions of load and speed of hoisting.

It will be seen that the operation of the drum and the cable 3 so far as above described is independent of the movement of the shaft 2, which may be going fast or slow and yet have no appreciable effect on the pull exerted by the cable 3 upon the bucket I. When the bucket is being hoisted, it is necessary to keep the requisite tension in the cable 3 and at the same time to wind up the cable at a speed corresponding to the speed with which the bucket is raised. From Figs. 2 and 3 it will be seen that the brake-band 7 will permit the drum to slip if the pull on the cable is greater than a predetermined amount, and this condition If it revolves in the direction indicated by the arrow in Fig. 3, it will wind up the cable 3 until the resistance on the cable equals that atwhich the brake-band 7 is set, and continued The pawl 9 is pref- 1 verably mounted on the bracket 9, bolted to movement of the wheel 8 will result in the i wheel 10 are inclined oppositely from those of wheel 8- and are engaged by the pawl 11, pivotally secured, by means of a pin 12 or otherwise, to the face of the wheel 8, as shown in Fig. 6. If shaft 2 turns in the direction indicated by the arrow in Fig. 6, pawl 11 locks wheels 8 and 10 together, causing the brakeband 7 to revolve, carrying with it drum 1 until the resistance of the cable 3 overcomes the friction of the brake-band, and thereafter the band slips around its bearing-face 7, serving to maintain tension in the cable, as previously described. V hen the shaft revolves in the opposite direction, pawl 11 is inoperative and wheel 8 is prevented from revolving by pawl 9, which is carried by the bracket 9 or any other suitable stationary support.

By the means above described we have produced a take-up device that maintains constant tension on the bucket-steadying cable regardless of movement of the shaft 2. yet so constructed that only a predetermined amount of pull can be exerted by the steadying-cable, thus insuring steadiness and uniform movement of the bucket in its work of hoisting and lowering.

What we claim as our invention, and desire to secure by Letters Patent, is as follows:

1. In a steadying device for hoisting-buckets and the like, the combination of a cable secured to the bucket; a winding-drum for said cable; said drum being loosely mounted on a revoluble shaft; a brake-band engaging said drum; a ratchet-wheel loosely mounted on said shaft and carrying the ends of said brakeband; a pawl carried by a fixed support and engaging said ratchet-wheel; a pawl pivotally mounted on said ratchet-wheel; together with a second ratchet-wheel keyed to said shaft and adapted to be engaged by said pawl.

2; In a steadying device for hoisting-buckets, and the like, the combination of a cable secured to the bucket; a winding-drum for said cable; said drum being loosely mounted on a revoluble shaft; a ratchet wheel loosely mounted on said shaft; a friction-brake carried by said ratchet-wheel and adapted to engage said drum with a predetermined amount of frictional resistance; a pawl carried by a fixed support and engagingsaid ratchet-wheel; a pawl pivotally mounted on said ratchetwheel; together with a second ratchet-wheel fixed to said shaft and adapted to be engaged by said pawl.

3. In a steadying device for hoisting-buckets, and the like, the combination of a cable secured to the bucket; a winding-drum for said cable, said drum being loosely mounted on a. revoluble shaft; a ratchet wheel loosely mounted on said shaft; a friction-brake carried by said ratchet-wheel and adapted to engage said drum with a predetermined amount of frictional resistance; means for adjusting the frictional resistance of said brake; a pawl carried by a fixed support and engaging said ratchet-wheel; a pawl pivotally mounted on said ratchet-wheel; together with a second ratchet-wheel fixed to said shaft and adapted to be engaged by said pawl.

4. In a steadying device for hoisting-buckets and the like, the combination of a cable secured to the bucket; a winding-drum for said cable, said drum being loosely mounted on a revoluble shaft; a wheel loosely mounted on said shaft; a friction-brake carried by said wheel and adapted to engage said drum with a predetermined amount of resistance; a looking device carried by a fixed support and adapted to engage said wheel, said device being adapted to permit the wheel to rotate in one direction only; a second wheel fixed to said shaft; and a locking device carried by said wheel, said last-mentioned locking device being adapted to rotate the loosely-mminted wheel in one direction only, for the purposes set forth.

5. In a steadying device for hoisting-buckets and the like, the combination of a cable secured to the bucket; a winding-d rum for said cable, said druln being loosely mounted on a revoluble shaft; a friction-brake mounted to revolve loosely around said shaft and adapted to engage said drum with a predetermined amount of frictional resistance; means for locking said brake against rotation in one direction; together with means carried by said shaft for rotating said friction-brake in one direction only, for the purposes set forth.

In testimony whereof we afiix our signatu res in presence of twowitnesses.

ERNEST B. PERRY. \VILLIAM BASSE'lilT.

\Vitnesses: V

A. A. EAs'ruRLr, W. l. GA'ruoAu'r.

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