US724579A - Hoisting apparatus. - Google Patents

Description

No. 724,579. PATENTED. APR. 7, 1903.

. A. v. HYSORE.

HOISTING APPARATUS.

APPLICATION FILED AUG. 13. 1902. N0 MODEL.

UNITE STATES PATENT FFICE;

ALPI-IENAS V. HYSORE, OF PHILADELPHIA, PENNSYLVANIA.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 724,579, dated April 7, 1903.

Application filed August 13, 1902. Serial No. 119,550. (No model.)

To all whom it may concern.-

Be it known that I, ALPHENAS V. HYSORE, of Philadelphia, in the county of Philadelphia 'and State of Pennsylvania, haveinvented certain new and useful Improvements in Hoisting Apparatus; and I do hereby declare the following to be a full, 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.

My invention relates to improvements in hoisting apparatus, and more particularly to an improved road-crane, the object of the invention being to provide a portable crane which can be easily and quickly adjusted in position over an object to be raised and by means of which heavy objects can be raised or lowered with a minimum expenditure of power. A further object is to produce a simple and efficient portable crane which shall be useful in laying sewer-pipes, setting curbs, setting monuments, loading stumps, pulling posts, and for handling various heavy objects.

With these objects in view the invention consists in certain novel features of construction and combinations and arrangements of,

parts, as hereinafter set forth, and pointed out in the claims.

In the accompanying drawings, Figure l is an elevation or a crane embodying my improvements. Fig. 2 is-an end view. Fig. 3 is a section on the line a: a; of Fig. 1. Fig. 4 is a detail view illustrating the brake.

1 represents a frame or arch comprising two parallel semicircular beams 2 2, spaced apart and braced by a series of bridge-blocks 3. The frame or arch 1 is'supported upon trucks 4, one at each end thereof. In constructing each truck I employ a bolster 5, provided at its center with an upwardly-projecting box 6, into which an end of the frame orarch is inserted and secured thereto by means of bolts 7. Each bolster 5 is provided at its respective ends with vertical journal-boxes 8 for the accommodation of the spindles 9 of caster-frames 10, the latter having casterwheels 11 mounted therein. Each casterwheel comprises in addition to its hub and rim a series of hollow spokes 12, and the rim is provided with a series of holes 13, communicating with said hollow spokes, to permit can be adjusted on the chain.

the insertion of a bar by means of which to turn the wheels for the purpose of moving the crane when it is desired to adjust the same plained.

It may be necessary not only to move the crane endwise for the purposes above set forth, but also to move the samelaterally or sidewise. To facilitate this, the spindles of each pair of casters are provided with crankarms 13, the free ends of which are connected together by means of a cross-bar 14, and with each cross-bar a pivoted lever 15 is connected for operating it to turn the two casters of a truck in unison. When the casters shall have been turned to the desired angle, they will be held in such position by means of a pin 16, inserted through a hole in the lever 15 and entering one of a series of. holes in a segment 17, secured to the bolster of the truck. This segment also serves as a handhold by means of which to pull or otherwise move the apparatus. Each lever 15 is also preferably made in two parts, hinged together at 18 to permit said levers to be moved out of the way when not in use.

Suitable bearings are provided upon the top of the frame or archfor the accommodation of a shaft 19, to which a sprocket-wheel 20 is secured. A sprocket-chain 21 passes over this wheel and is'prevented from escape from the sprockets thereof by means of an idle pulley 23, mounted in the frame or arch. This chain is secured at one end to the frame or arch and is then passed down and then up over the idle wheel and around the sprocket and carries at its free end a weight, the latter having a hook by which it Located in the loop of the chain is the pulley 24., carrying the hook 25, which latter is designed to be attached to the object to be lifted.

Two ratchet-wheels 26 26 are secured to the shaft 19 at points beyond the beams of the frame or arch, and adjacent to each ratchetwheel a lever 27 is pivotally attached to the shaft. Each lever 27 is made of considerable length and has pivoted thereto a dog 28 to engage the adjacent ratchet-wheel, said dogs being connected with finger-bars 30 on the levers by means of rods 31 to permit the operator to readily remove them from the ratchetwheels, and each lever extends beyond its ratchet and carries on such extended portion a suitable counterweight, which assists the operator in elevating the levers 27 to a position for another stroke. Retaining-dogs 32 are pivoted to the frame or arch and engage the ratchet wheels to prevent retrograde movementoftheliftingdevices. Hand-levers 33 are pivoted to the frame and connected, by means of rods 34,with the dogs 32 for disengaging the latter from the ratchet-Wheels when the load is to be lowered. In order to regulate the descent of the load, a brake is provided. This comprisesadisk 35, secured to the shaft 19, a Wooden block 36, secured to one of the beams of the frame adjacent to one face of the disk, another block 37, held in a frame 37 and having one face parallel with the other face of the disk, the other face of the block 37 being beveled, and a movable wedge 38, inserted between the beveled face of block 37 and one of the beams of the frame. The wedge 38 is connected by a rod 39 with a hand-lever 40, pivoted to the frame, so that when the latter is operated the wedge will act to crowd the block 37 against the disk 35, and thus retard the rotation of the shaft 19 and the descent of the object attached-to the chain.

Slight changes might be made in the details of construction of my invention without departing from the spirit thereof or limiting its scope,-and hence I do not Wish to limit myself to the precise details herein set forth.

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

1. In a portable crane, the combination with a frame or arch, of bolsters on which the ends of said frame or arch are mounted, caster-frames having vertical spindles mounted in the ends of said bolster, crank-arms on said spindles, a cross bar connecting said crank-arms in pairs, a lever connected with each cross-bar for turning the caster'frames, wheels mounted in said caster-frames, and hoisting devices mounted on said frame or arch.

2. In a portable crane, the combination with two trucks, of a frame or arch mounted at its ends on said trucks, a shaft mounted upon said frame or arch, a sprocket-wheel secured to said shaft, a chain passing over said sprocket-wheel, an idle pulley for preventing disengagement of the chain from the sprocketwheel, means for turning the shaft in one direction, and a brake for controlling the reverse rotation of the shaft.

3. In a portable crane, the combination with two trucks and an arch or frame mounted at its ends thereon, of a shaft mounted upon said frame or arch, a sprocket-wheel secured to said shaft, a chain passing over said sprocket-wheel, means for turning said shaft in one direction, a disk secured to the shaft, a movable block, a wedge for pressing said movable block against a face of the disk, and means for operating the wedge.

4. In a portable crane, the combination with a frame or arch and trucks on which the ends of said frame or arch are mounted, of a shaft mounted upon said frame or arch, a sprocket-wheel secured to said shaft, a chain passing over said sprocket-wheel, a ratchet- Wheel secured to said shaft, a lever pivoted to the shaft, a dog carried by the lever to engage the ratchet-wheel, a retaining-pawl to engage the ratchetwheel and a lever attached to the frame or arch for operating the retaining-pawl, and provided with a counterweight.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

ALPHENAS V. HYSORE.

Witnesses:

JOHN P. ADAMS, ALFRED H. DAWSON.

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