US888695A - Hoisting apparatus. - Google Patents

Description

,180. 888,895. PATBNTED MAY z8, 1908.

l E. A. COLLIN. HoIsTING APPARATUS.

APPLIOATION FILED MAY 4. 1807. BENBWBD MAR. 28.1908.

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No. 888,895. BATBNTBD MAY 28, 1908.

B. A. COLLIN.

HOISITING APPARATUS.

APPLICATION FILED MAY 4, 1907. RENEWBD MAR. 23, 1908.

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ERIK A. COLLIN, OF TURNER, NEBRASKA.

HOISTING APPARATUS.

Application filed May 4, 1907,1Seria1 No. 371,858. Renewed March 23, 1908.

To all whom it may concern:

Be it known that I, ERIK A. COLLIN, a citizen of the United States, residing at Turner, in thecounty of Holt and State of Nebraska, have invented certain new and useful Improvements in Hoisting Apparatus, of which the following is a specification.

This invention embodies an improved machine for hoisting purposes and comprehends novel features of construction in mechanism of this type, designed to increase the utility and serviceability thereof to a maximum degree.

The various details of construction of my invention above referred to, are set forth in a preferred embodiment hereinafter, but it is to be understood that the same may be modified in accordance with the true spirit of invention involved as defined by the claims appended hereto.

For a full understanding of the invention and the merits thereof and also to acquire a knowledge of thedetails of construction of the means for effecting the result, reference is to be had tothe following description and accompanying drawings, in which:

Figure 1 is a side elevation of the device in o erative osition' Fig. 2 is a lan view of t) the same g Fig. 3 is a vertical longitudinal sectional view en the plane of the drum shaft, and Fig. 4 is a front elevational view.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

In carrying out this invention it is contemplated that the mechanism utilized in the practical embodiment thereof shall be mounted upon a suitable support which in this instance consists of two longitudinal sills 1 connected by transverse beams 2. The members 1 and 2 may be of any substantial. form suitable for supporting the mechanism comprising this invention. Projecting upwardly from the sills 1, intermediate yof their ends, are spaced uprights 3 in which are journaled the opposite ends of a windlass-shaft 4, the uprights being provided with suitable bearings for said shaft. A drum 5 is mounted upon the shaft 4 for rotation therewith beingy secured to the shaft by any desirable means. Interposed between each end of the drum 5 and the adjacent upright 3 are ratchet wheels 6 and 7 the wheel 6 being of larger diameter than the wheel 7. In other words, a set of the wheelsw andg', one each, isfilocated at Specification of Letters Patent.

Patented May 26, 1908.

Serial No. 422,735.

each end of the drum 5, the ratchet teeth of each wheel 6 being opposite to those of the adjacent wheel 7. The opposite extremities of the shaft 4 projects slightly beyond the Outer sides of the uprights 3 and suitably. attach-ed to said extremities are the wormwheels 8 and 9.

Attached to the u per portions of the uprights 3 is a suitable frame 10 at the opposite end portions of which are provided suitable bearings receiving end portions of screws or worms 11 and 12, the worm or screw 11 having the threaded portions thereof engaging the teeth of the worm gear 8 while the similar worm or screw 12 has its thread or spiral portions in engagement with the worm gear 9. Bearings in the frame 10, in which the screws 11 and 12 are mounted, are provided at'opposite sides of the frame, one of said bearings for each screw being open as shown at 13 to admit of ready removal of those elements whenever found necessary or desirable, under actual conditions of service. Opposite extremities of the screws 11 and 12 roject outwardly from the opposite sides o the frame 10 and have operating wheels 14 attached thereto, which are turned, in order to actuate the worm gears 8 and'Q and thereby rotate the drum 5 mounted on the shaft 4.

The forms of the screws 11 and 12 are slightly dierent, the screw 11 being the larger of the two and being provided with a greater number of spirals or threads than is the screw 12. The threads or spirals of the screw 11 may be described to have a quick pitch the obj ect in this construction being to permit of action of the worm gear S coperating with the screw 1 1, at a'greater speed than is obtainable in the action of the screw 12 at the expense of the same power, the last mentioned screw having a less number and less abrupt pitch of threaded portions in coperationA with the worm gear 9, whereby the drum 5 will be connected at as lower speed when the screw 12 is operated. Of course the provision of the screw 12, having a more gradual pitch of threaded portions gives greater power in the operation of the worm gear co-acting with said screw, in the hoisting operation. A suitable cable passes over a suitable sheave or pulley 16 mounted at the outer portion of a pivoted derrick su port 17 which is connected with adjacent ends of the longitudinal sills 1. The pivoted support 17 is adapted to be operated so as to assume a position in which the pulley 16, over which the cable 15 passes, is nearer to or farther from the hoisting mechanism hereinbefore described, according to the necessities arising in the actual operation of the mechanism. In order to hold the pivoted support 17 at a desired adjustment, an adjustable bar 18 is pivotally connected with its lower portion and said bar is formed with a plurality of vertical openings 19. A vertical pin or member 20 is adapted to pass through any one of the openings 19 to engage with an adjacent one of the beams 2, whereby the support 17 will be held rigidly in a predetermined position. For each set lof the ratchet wheels 7 and 8 are provided a set of cooperating ratchet pawls 21 and 22 the pawls 21 cooperating with the wheels 6 while the pawls 22 cooperate with the wheels 7. The pawls 21 are pivoted to blocks 23 attachedto the adjacent uprights 3 while the pawls 22 are directly pivoted to said uprights.

dien a load is being hoisted by the machine as above described, that is, the cable 15 is wound upon the drum 5 connected by either one or both of the screws 11 and 12. Under such conditions the ratchet awls 21 are engaged with the ratchet whee s o, freely rotating over the teeth of said wheels 6 as the drum 5 rotates, and forming safety lock means to hold the drum 5 from movement at any point in the rotation of the members 11 or 12. If it is desired to prevent the load from being elevatedit will be obvious that the ratchet pawls 22 may be engaged with the wheels 7 to prevent winding movement of the cable 15 on the drum 5, virtually locking the drum if the pawls 21 are also in cooperation with their ratchet wheels o, from rotating in either direction. By the provision of the peculiar forms of screws 11 and 12 it will be apparent that the load connected with the hoisting cable 15 may be lowered or raised faster or slower as may be desired.

rThe machine hereinbefore described is very simple in its construction and operation and various advantages are derived from the peculiar construction of the parts employed, as will be apparent from the foregoing description. The provision of the peculiar form of worm gears and cooperating worms or screws is an important factor in obtaining certain desirable results in the practical operation of the mechanism. At opposite sides ofthe machine the frame 10 is braced or reinforced by the vertical members 24.

Having thus described the invention what is claimed as new is:

1. In a hoisting machine of the type described, the combination of supporting means including supporting sills, a framework carried by said sills, a windlass-shaft mounted in bearings in said framework, a drum attached to said shaft for rotation therewith, sets of oppositely toothed ratchet wheels arranged between the opposite ends of the drum and adjacent sides of the framework and secured to the windlass-shaft, oppositely arranged pawls located upon the framework and arranged for cooperation with the sets of ratchet wheels aforesaid, worm gears attached to opposite ends of the shaft above mentioned, worms or screws mounted in the framework of the machine and engaging with the aforesaid worm gears, handles for operating said screws, the screws being provided with spirals or threaded portions of different pitch for the purpose described, and a cable adapted to be wound upon the drum.

2. In a hoisting machine of the class described, the combination of a framework including longitudinal sills and connecting cross beams, a windlass-shaft mounted in bearings in said framework, a drum mounted on said shaft, a set of oppositely toothed ratchet wheels arranged between each end of the drum and the adjacent side of the framework, a set of oppositely disposed ratchet pawls cooperating with each set of ratchet wheels, a worm gear mounted upon each end of the windlass-shaft and secured thereto for rotation therewith, worms or screws of different pitch mounted in the upper portion of the framework and engaging with the worm gears, handles applied to said worms or screws for operation thereof, a pivoted support connected with adjacent en s of the longitudinal sills, a pulley carried by said support, a cable connected with the drum and extending over said pulley, and an adjusting bar pivotally connected. at its outer end with the pivoted support and adjustably connected at its inner end with one of the cross beams of the machine for the purpose specified.

In testimony whereof I affix my signature in presence of two witnesses.

ERIK A. COLLIN. i

Witnesses:

J. G. KLoKn, Emo Bone.

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