US57850A - Improvement in hoisting apparatus - Google Patents

Description

UNITED STATES PATT @nieren HENRYBLAOK, OF OARROLLTON, ILLINOIS.

IMPROVEMENT IN HO'ISTING APPARATUS.

Specification forming part of Letters Patent No. 57,850, dated September l1, 1866.

To all whom it may concern:

Be it known that I, HENRY BLAcK, of Garrollton, in the county of Greene, in the State of Illinois, have made certain new and useful Improvements in Hoisting Apparatus; andI do hereby decla-re that the following is afull, clear, and exact description thereof, reference being had to the accompanying drawings,'and to the letters of reference marked thereon.

Figures l, 3, et, and 5 are sectional side elevations of the improved apparatus. Fig. 2 is a transverse sectional elevation of it. Fig. 6 is a detailed elevation of a brake which is or may be used.

The object of this invention is to produce an apparatus for hoisting goods of any kind, such as bales, boxes, orloose hay in forkfuls, and after such goods have been hoisted to the required elevation, by an automa-tic action of the machinery they are made to travel in a lateral direction any required distance to the point of delivery. The construction of the traveling carriage or pulleys is such that the load, on arriving ata certain point, will cause the carriage to start forward automatically, and when the load has been delivered at the proper point the carriage will return to its former position, also by an automatic action. The hoisting-rope is prevented from ruiming over the pulleys too rapidly by means of an automatic brake.

To enable those skilled in the art to make and use my improved hoisting` apparatus, I will proceed to describe its construction and operation.

A A are the beams of a building or the timbers of a frame constructed for the purpose of sustaining this apparatus. B is an iron rod stretched tightly between two or more of the timbers A, and so arranged that the wheels O O can travel back and forth upon it as upon a track. D is a metallic carriage, formed of two side pieces, one of which is placed on either side of the rod B. In the present design these side pieces are shaped somewhat in the form ofthe shoe of a horse, with the open part upward, and the bearings for the axles of the wheels O O in the upper ends. Of course this precise form is not an arbitrary matter in the construction of this carriage; but it is simply introduced as being a convenient and economical form.

That portion of the fall F which is between the sheaves E and'E must of necessity be parallel, or nearly so, with the iron rod B.

G is a brake, which is arranged to press against the rope or fall F where it passes over the sheave E, so as to regulate the motion of the carriage after the weight has been raised high enough to cause the carriage to move forward on the track Btoward the sheave E', as will be hereinafter more fully explained.

a-is a lever, attached to the journal of the brake outside of the carriage D, for the purpose of operating the brake. The rope or cord H is attached to one end of the lever a, from which point it passes over the sheave E2, and

thence down to the weight IV', which weight, applied to the brake through the medium of the rope H and lever a, produces the required amount of friction upon the fall F. rIhe lever a is connected with the lever a by means of a pivot-joint at x, and the upper end of it is long enough to extend up above the stop b, which it strikes as the carriage arrives at its rear station, as shown in the drawings, and the brake is thereby thrown up oit of the rope or fall,which will then run freely over the sheaveE.

I is a pawl, attached to the carriage D at t', and arranged to drop automatically into the hook I( when the carriage is run back to the position shown in the drawings, for the purpose of holding` the carriage station ary during the hoisting of the load. 1 The pawl is jointed at fi', so that it may be easily released from the hook I', even when there is a strain upon it. The two ends ofthe pawl are keptin line with each other when in the hook, as showuin Fig. 3, by means of the spring 2 and link i3. There is a rod, l2, connected with the pawl at i', and from this point it extends downward to the ring 4, which forms its lower end7 and through which the fall F is conducted.

.The operation of the machine is as follows:

" rod or track B toward the pulley E.

e sasso The weight to be hoisted is to be attached to the hook W, which will then be drawn up by means of some power--no matter what-applied to the other end of the fall F. When the weight has been hoisted so high that the hook W will strike against the ring it it will thereby raise the rod I2, and so raise andrelease the pawl from the hook I. The carriage thus released will start forward on the The tendency of the action of the yload at Wwould then be to run rapidly downward, and at the same time the carriage would shoot rapidly forward toward E, thereby subjecting the machine to imminent danger by breakage, were it not that at the very moment that the earriage commences to move forward the brake G is applied to the fall when it passes over the sheave E, and, completely locking the fall and sheave, holds the weight up to the highest point to which it has been raised, while thc steady force applied to the opposite end of the tall causes the carriage and its suspended load4 to advance steadily toward the point of delivery, which is in the direction of the sheave E. The brake is applied by means of the carriage moving forward sufficiently to release the lever c from the stop b, when the weight W is allowed to act by its own gravity upon the brake. When the load has been deposited "andthe hook W released, and the power disconnected from the opposite end of the fall,

Ythe weight W will be sufficient to draw the carriage back to its first position, at which, when. it arrives, the pawl will drop into its hook to retain it there, and the lever a will strike the stop b, and release the brake, as has already been described. As soon as the brake is released the weight of the hook WV may be suiiicient to lower the fall for another load;

or a small cord may be attached to the hook for that purpose.

The brake should be adjustable by some means, so it can be made to press on the fall at the proper point, and also hard enough to produce the desired result. In Fig. 1 this adjustability is effected by constructing the brake in two parts, c and c', so arranged and combined together that the part c may be extended outward or contracted at pleasure by means of the set-screw c2. The rope or fall, at the point where the brake would rest upon it, should be covered with some strong material, such as leather, for the purpose of preventing undue wear.

The abovefdescribed are the general features of my invention; but the construction of the various parts may be widely varied hy-any ordinary mechanic. j

Figs. Al, 5, and 6 represent some of the variations, which readily suggestthemselves.

In Fig. 4c the device for operating the brake consists of a segmental cog-wheel attached to the outer end of the brake-shaft. This cog Wheel gears into another section of segmental cog-gearing cnt on one of the peripheries of a counter-wheel having two radii, and that pe riphery of it which is described by the longer radius is also indented with cogs or` teeth, which gear into a rack, which, as the carriage returns to its position to receive its load, strikes against some stationary stop provided to receive it, and then, running back, as the carriage advances, acts through the counter` wheel with a leverage upon the brake to withdraw it. The brake is applied in this case, asin the one already explained, by means' of a weight.

Fig. 6 is a plan of brake with curved and corrugated front, designed to be used with the machinery as described for Fig. 4.

Fig. 5 represents another construction of the pawl for holding the carriage in position during the time the load is being raised to the ring i4. In this construction the spring applied to the hack end ofthe pawl and the i hook to which the pawl connects is a simple stop fastened upon the rod B behind the station of the wheels C C.

Having described my invention, what I cla-im isl. The combination of the carriage D, having the wheels C C, arranged to travel upon the rod or track B, and the automatic pawl I and automatic brake G, or their equivalents, when used as and for the purpose set forth.

2. The construction of the brake G in an adjustable manner, so it may be set to any required distance from the sheave E.

, HENRY BLACK.

Vitn esses:

M. RANDOLPH, H. KRAATZ.

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