US488044A - John e - Google Patents

Description

(No Model.)

"J. E. WALSH.

HOISTING APPARATUS. No. 488,044. Patented Dec. 13, 1892.

UNITED STATES PATENT OFFICE.

JOHN E. WALSH, on NEW YORK, N. Y.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 488,044, dated December 13, 1892.

' Application filed August 24., 1892. Serial No. 443,977. (No model.)

To all whom it may concern:

Be it known that I, JOHN E. WALSH, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Hoisting Apparatus, of which the following is a specification.

My invention relates to improvements in hoisting apparatus; and its object is to provide an automatic mechanism for the speedy return of the trolley carrying the hoistingrope after the load has been deposited from either end of a crane, thus saving considerable time and labor.

In the accompanying drawings, Figure l is a side elevation of an apparatus showing my improvements. Fig. 2 is a front view of the same, partially in section.

Similar letters of reference designate corresponding parts in all the figures.

Although one crane or arm could be arranged with my improvements attached to it, I preferably employ two slotted arms D, one at each side of a mast A, mounted thereon by means of an adjustable sleeve B, and capable of being swung up and sidewise. A trolley R, carrying the roller r guiding thehoisting-rope h, is mounted upon each arm and free to travel thereon from one end of the arm to the other. In a stirrup-shaped forging or casting O, in front of each arm D, are preferably mounted two sets of rollers r and '1, one above the other, and upon the end of each arm a roller r is secured by means of the stirrup E. Below each side of the sleeve B is secured one block of a hoisting-tackle H, and a weight w, guided in the groove a of the mast A, is suspended from the other block. The end of the guide rope or fall h is given several turns around a drum d, connected with a brake-wheel d, and in the case of loading from the dock into a vessel (represented in Fig. 1 of the drawings) the end is guided up and over a roller r to the front end of the trolley R and is there secured in its proper position. The drums d d, with the brakewheels d cl, are mounted one upon each end of a shaft f secured to the mast A, and are free to turn thereon, although the motion of either one can be arrested by the depression of a treadle 25, whereby a brake-band d is thrown in contact with its respective brakerope h, after leaving the drum 7c of its re- I spective hoisting-engine, will be passed up and over a roller r and from there to and half-way around the roller r and back over the pulley r mounted in the trolley R, to the place of loading. The weight w will be selected in such a manner that it will return the trolley to its starting position when the load is delivered, an adjustable stop .9 checking the motion of the weight, and thereby regulating the point at which the trolley stops on its return.

The operation of one side of my hoisting apparatus is then as follows: The trolley R is held in its starting position, while the Weight w is resting upon the stop 8 (in the case represented in Fig. 1 the starting position of the trolley will be nearest to the mast) and the load is attached to the hoisting-rope h. Before starting the hoisting motion the engineer will press with one foot upon the corresponding treadle t and start the hoisting-machine and continue to hoist till the load approaches the crane D. At this moment the engineer releases his hold upon the 'treadle t, whereupon the trolley R will travel forward,slightly dropping the load, which at the same time will raise a weight w. The hoisting is continued without intermission during this operation. If the forward motion of the trolley or the dropping of the load becomes too rapid, the foot is placed upon the treadle again, and this is repeated till the trolley arrives at its end point over a hatch of a vessel, whereupon the load is lowered to the bottom of a vessel. As soon as the load is detached from the hoisting-rope and also the pressure from the brakeband 01 is released, the weight w will automatically return the trolley R to its startingpoint, (the hoisting-rope having previously been raised to a position high enough to prevent injury to attendants on the vessel.) If the load is to be taken out of ayessel and transferred to a dock, the positions of the ropes h and h are exchanged. The rope h is then guided from the drum d over a roller 7" to and half-way around the roller r and secured to the outer end of the trolley R, while the rope h is passed from a hoisting-drum 710 over a roller r in the trolley R anddropped at the opposite side of r to the ground below. In this case the Weight w will return the trolley automatically to a desired point at the outer end of an arm D over the hatch of a vessel, and the load will be deposited upon a dock in the same manner as described above. As each arm is worked independently by a separate attendant, it is evident that one arm can be worked loading into the hatch of a vessel, while the other unloads the vessel from another hatch, although the entire apparatus, instead of being mounted upon a dock, may be mounted upon a float, and thus be made transferable.

I am aware that weights have been employed to return the trolley in one direction after the load has been deposited, and do not claim this mode of returning the trolley,broadly';but

What I claim, and desire to secure by Letters Patent, is r The combination of a mast erected on a from there over the pulleys of two blocks of a hoisting-tackle, to one of which blocks the other end of a tackle-rope is secured, and Weights guided in the mast and suspended each from one of the blocks, while the other is secured to the mast, as and for the purposes herein shown and described.

Signed at New York, in the county of New York and State of New York, this 23d day of August, A. D. 1892.

' JOHN E. WALSH.

Witnesses:

PHILIP J. RYAN, PETER ROGERS.

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