US690774A - Hoist. - Google Patents

Description

i). la.` BowLANn.

HOIST.

(Application led July S0, 1960.)

(No Model.)

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' provements in Hoists; and I do hereby declare that the following is a full, clear, and

UNITED STATES PATENT OFFICE.l

DAVID E. ROWLAND, OF CANTON, OHIO.

v I SPECIFIGATION forming part of Letters Patent No. 690,774, dated January 7, 1902.

Application filed July 30, 1900.

T0 all whom, 1225 mayconcern.:y

Be it known 'that I, DAVID E. ROWLAND, a Y citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented certain new and useful Imexact description of the same, reference being had to the annexed drawings, makinga part of this specication, and to the gures of reference marked thereon, in which- 4 Figure 1 is a perspective view showing the different parts properly'assembled. Fig. 2 is a side elevation of the hoist-head, showing an edge view of the pulleys. Fig. 3 isa vertical section of the hoist-head and its different parts 'on a linelwith the pulleyaxle,ex cept theaxle is not shown in section. Fig. 4 isa detached view of the rsupporting-hook. Fig. 5 is a detached view of the hook-connecting head or flanged collar. Fig. 6 is a detached view of the hook-connecting-head sections. Fig. 7 is a detached view of the collar-shifting yoke and lever. Fig.V 8 is a detached view of the sliding collar and its pins. Figs. 9 and v10 are detached views of the larger hoist-pulleys. Figs.A l1 and 12 are detached views of the smaller hoist-pulleys.

The present invention has relation tol hoists; and it consists in the diderent parts and combination of parts hereinafter described, and particularly pointed out in the claims.

Similar numerals of reference indicate corresponding parts in all the figures of the drawings. i

In the accompanying drawings, 1 represents the hoist block or head, the upper end of which is yoke-shaped and the lower end or portion provided with the chain-guides 2,said chain-guides being located and arranged substantially as shown in Fig. 1.

To the head or frame 1 is connected the pulley-shaft 3, and upon which pulley-shaft are mounted the pulleys 4 and 5, said pulleys being located side by side, as illustrated in Figs. 1, 2, and 3. The pulley 4 is somewhat larger in diameter than the pulley 5, said pulleys being so formed for the purpose of imparting a differentiated movement to the different members of the endless chain 6,

said endless chain being located and arranged serial 110.215.238. (No modela substantially as shown, and, as shown, the members are located over the pulleys 4 and 5 and two members thereof located under the o pulley 7 ,which pulley is properly j ournaled to the elevating head or block 8, said head or block being provided with the ordinary connecting-hook 9 or its equivalent.

It will be understood that by forming` the 6o pulleys 4 and 5 of different diameters and moving the elevating-chain over said pulleys in the direction to elevate the hoist head or block 8 a slow upward movement will be imparted to the head 8, together with the load connected thereto, thereby providing a`means for easily elevating by hand heavy articles.

By my peculiar arrangement I am' enabled to lower the elevating-head after it has been carried to the desired height without locking 7o the elevating-chain backward.

For the purpose of overcoming the slow manner of lowering the elevating-head 8, as above described, I employ the single pulleys '4 and 5 and locate them side by side and 75 mount them upon the shaft 3, and for the purpose of causing the pulleys4 and 5 to rotate in unison when itis desired to have them so rotated the sliding pins 10 are provided, which sliding pins are located in the aper- 8o tures 11, being formed through the pulley 4, and the pins extended into the apertures 12, v formed in the pulley 5, when they registerl with the pins 10, or, in other words, said pins enter the apertures 12 at the time they regis- 85 ter with the apertures l1, thereby rotatably connecting the pulleys 4 and 5 together. When it is desired to have the pulleys 4 and 5 rotated independently upon the shaft 3, the` lever 13 is pulled downward atits outer end 9o by meansv of the chain or cord 14, saidchain or cord being extended downward to a point where it can be conveniently reached by the hand of an operator. As the outer end of the lever 13 is moved downward the bottom 95 or lower end of the yoke 15 will bemoved laterally and away from the outerrface of the pulley 4 and carry with it the grooved collar 16, to which grooved collar the pins l0 are securely attached, and as the grooved collar roo 16 is moved away from the pulley 4 it will carry with it the pins 10, thereby disconnecting said pins from the apertures 12, at which Y time the pulleys 4 and 5 are free to rotate independently of each other. It will be understood that the grooved collar 16 rotates at all times with the pulley 4, inasmuch as the pins 10 are never disconnected from the pulley 4.

For the purpose of providing for the sliding movement of the grooved collar 16 the pulley 4 is provided with the-hub 17, which hub is formed of such a length that the grooved collar 16 can move back and forth or to and from the outer face of the pulley 4. For the purpose of reducing the friction of the grooved collar 16 and at the same time carrying said collar the outer portion of the hub 17 is provided with the fins or ribs 18, and upon which ribs or tins the collar rests or moves. It will be understood that the ribs or tins should be so formed that they will engage the inner periphery of the aperture formed in the sliding collar, thereby allowing a free movement back and forth upon the hub proper.

The pulley 4 is provided with a chamber 19, which chamber is for the purpose of holding the antifriction-rollers 20, said antifriotionrollers being located and arranged substantially as shown in the drawings. The pulley 5 is provided with the hub 21, and said pulley is also provided with the chamber 22, which chamber is for the purpose of receiving the antifriction-rollers 23, said rollers being located and arranged substantially as shown in the drawings.

The top or upper end of the hoist frame or head 1 is provided with the recess or chamber 23nl and into which chamber or recess are placed the coupling-head members 24, which coupling-head members are each provided with the semicircular groove 25, and when said members are placed together the grooves 25 will form a complete circle, which grooved circle is for the purpose of receiving the ange 2G, formed upon the lower end of the head 27, as illustrated in Fig. 3. Y

To the head 27 is connected the suspending-hook 2S, said suspendinghook being headed at its bottom or lower end, thereby securely connecting the head 27 to the hook 28, and by providing the groove 25 in each member of the coupling-head 24 said coupling-head will be connected to the head 27 by means of the flange 26, thereby producing a swivel connection between the hook 28 and the head or frame 1.

The coupling-head members 24 are each provided with the downward-extending arm 29, to which arms is pivotally connected the lever 13, said lever being also pivoted to the head or frame l by means of the rivet or bolt 30 or its equivalent at a point directly over the downward-extending yoke 15.

It will be understood that by providing two pivotal points for the lever 13 when said lever is moved downward at its outer end its inner end will move upward, carrying with it the head 1, and in order to provide for this movement of the head 1 the chamber 23"L is so formed that it will allow the head 1 to come and go or move in a limited sense up and down upon the members of the coupling-head 24, it being understood that the chamber 23 will at all times hold the members 24 in proper contact with each other. The only object in making the coupling-head 24 in two separate pieces or halves is to provide a means for connecting said members orhead with the head 27.

For the purpose of providing a brake for the pulley 5 the lever 13 is provided with the shoe 31, which shoe is preferably formed integral with said lever and is so located that it will engage the periphery of said pulley 5 at a time when the lever is moved downward at its outer end. The shoe 3l should be so adjusted that it will stop the downward movement of the lever 13 at a point or time when the pins 10 are disconnected from the pulley 5, thereby allowing the pulley 5 to be held against rotation and allow an independent rotation of the pulley 4.

For the purpose of insuring the engagement of the pins 10 with the apertures 12 the inner face of the pulley 5 is provided with the inclines 32, or, in other words, recesses having inclined seats are provided, said recesses being illustrated in Fig. 1l. In the drawings I have illustrated two pins 10, said pins being arranged as shown; but it will be understood that a single pin will bring about the same result as the two pins-that is to say, by the longitudinal movement of a single pin in the same manner that the two pins show the pulleys 4 and 5 can be connected and disconnected rotatably one from the other.

It will be understood that by pivotally connecting the lever 13 to the coupling-head 24 or to the integral arms thereof and also pivotally connecting said lever to the hoist block or frame 1 the weight of said head or frame, together with its different parts, except the coupling-head 24, the flange-head 27, and the hook 28, is utilized, together with the chain and the elevating-head, to force the outer end of the lever 13 upward and at the same time forcing the collar 15 toward the pulley 4, by which arrangement the pulleys 4 and 5 are rotatably connected together by the longitudinal movement of the pin or pins 10.

Having fully described my invention, what I claim as new, and desire to secu re by Letters Patent, is-

1. In a hoist of the class described, a frame provided with a chamber atits upper portion, v

a coupling-head located in the chamber, a head journaled to the coupling-head, a lever pivotally connected to the coupling-head and to the frame, a downward-extending yoke, a sliding collar operatively connected to the yoke and provided with a pin, a hub carrying the sliding collar, pulleys mounted upon the shaft and provided with apertures to engage the pin of the sliding collar, an elevating pulley-block and an endless chain, all arranged substantially as and for the purpose specified.

2. In a hoist a frame, means for suspending the frame, a shaft carried bythe frame, a

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neeted to the frame and to the coupling-head and an elevating chain, and an elevatingblock, substantially as and for the pupose 15 specified.

In testimony that I cla-im the above I have hereunto subscribed my name in the presence of two witnesses. A

DAVID n. RoWLAND.

Witnesses:

J. A. JEFFERS, F.1W. BOND.

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