US857972A - Hoisting-machine. - Google Patents

Description

No. 857,972. 'PATENTED JUNE 25, 1907.

-D. ARTHUR. HOISTING MACHINE.

APPL OATION FILED MAR 7 1907 H-HEETkSHEET L 710/ WW4 13 %wm v%@01/M BY geomwi ATTORNEY No. 857,972. I PATENTBDJUNE 25 190v. n. ARTHUR.

HOISTING MACHINE.

APPLICATION FILED MAR. 7. 1907.

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N0. 857,972. PATENTED JUNE 25, 1907.

D. ARTHUR. HOISTING MACHINE;

APPLICATION FILED MAE. 7. 1907. MHEETSHSHEET 3 HZI i i W I I/JIIIIIL 83 o f a WWW! O 5 w wmv 858 l INVENTOH vmmm No. 857,972. PATENTED JUNE 25, 1907.

' D. ARTHUR.

HOISTING MACHINE.

,APPLIOA'TION FILED MAR. 7. 1907.

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' 73 f'" III" I lllllfl lllllllll llllll II I llllilll IIIIHHIIIIIHIIIHH! A TTORN E Y 11 iTED STATES DANIEL ARTHUR, OF NEW FORK, N. Y.

HOlSTlNG-MACHINE.

Specification of Letters Patent.

Patented June 25, 1907.

Application fil d March 7,1907. Serial No. 861,126.

To all whom it nuty concern:

Be it known that I, DANIEL ARTHUR, a citizen of the United States, and a resident of New York, borough of Brooklyn, in the county of Kings and State of New York, have made and invented certain new and useful Improvements in Hoisting-Machines, of which the following is a specification.

My invention relates to an improvement in hoisting machines, the object being to provide a device of this character which shall be simple and economical in construction, com pact in form, eflicient in use, and practically noiseless when in operation.

Vith these and other ends in view, my invention consists in certain novel features of construction and combinations of parts, as will be hereinafter fully described and pointed out in the claims.

In the accompanying drawings, Figure 1 is a viewin side elevation of my improved hoist. Fig. 2 is a longitudinal sectional view taken on the line 2-2 of Fig. 3, the several parts, however, being in their operative positions. Fig. 3 is a plan view of the hoist. Fig. 4 is a sectional view taken on the line 4-4 of Fig. 2. Fig. 5 is a sectional view taken on the line 55 of Fig. 4', and looking in the direction of the arrow. Fig. 6 is a view in side elevation of a modified form of the device. Fig.7 is a plan view thereof. Figs. 8 and 9 are views showing several devices for shifting the several parts into operative positions. Fig. 10 is a detached view of the circular toggle illustrated in Fig. 9. Fig. 11 is a detached view of one of the driving wheels illustrated in Fig. 9.

Referring to the drawings, 12 reperesents the bed plate of the device secured to the floor 13, and having cast integral therewith or secured thereto the brackets or supports 14 14, formed with the tubular bearing 15 in which latter rotates the driving shaft 16. On one end of this shaft is secured the gear wheel 17, meshing with the gear wheel 18, on the shaft 19 of which is secured the band pulley 20, by means of which power from any suitable source is transmitted to the shaft 16. It will be understood, of course, that the pulley 20 may be secured directly to the shaft 16 or rotated by electric or other motor connected thereto, or may be driven in any other suitable way to which my invention is 1n nowise limited. To the shaft 16, near one end thereof, is also secured the friction drive wheel 21, and to the opposite extreme end is tightly secured the rope sheave 22. To the forward part of the bed 12 is movably secured the lower end of the frame 23, the upper end having cast or otherwise formed thereon the tubular bearing 24, in which rotates the shaft when the hoist is in operation. On one end of the shaft 25 is secured the friction drive wheel 26, arranged to be moved into contact with the similar drive wheel 21, and on the opposite end of the shaft is secured the rope sheave 27, which when the several parts are in their operative positions, grips the hoisting rope 28 between it and the sheave 22, in order to raise it.

On the tubular bearings 15 and 24 are formed the vertical arms 29 and 30, respectively, supporting a frame which operates as one arm of a toggle, said frame consisting of the side bars 3132, rear cross piece 33, and front bar 34. Through the bar 34 passes a screw 35, to the forward end of which, formed with the ring 36, is secured a rope, wire or chain 37 by means of'which the device is put into operation. On the rear end of this screw is supported the other arm 38 of the toggle, the end of the screw fitting in a recess formed in the toggle arm to receive it. The opposite end of the lever 38 fits in a recess formed in the vertical arm 30, the arm or le ver 38 being supported thereby in an inclined position when the hoist is at rest, and in turn supporting in an inclined position, the forward end of the other arm or frame. The rear end of this frame is supported by means of the vertical arm 29 formed with a recess in which fits the cross bar 33, as clearly illustrated in Fig. 2 of the drawings.

From the foregoing description it will be understood that when the rope 37 is pulled downwardly, the two arms of the toggle will be lowered from the positions as illustrated in Fig. 1, to those illustrated in Fig. 2, the result being that the frame 23 will be swung backwardly, carrying with it the friction wheel 26 and rope sheave 27, and causing the former to be frictionally driven by the wheel 21, and the latter, that is, the rope sheave 27, to tightly grip the rope 28 between it and the sheave 22, as before described. As the two friction wheels 21 and 26, and the two rope sheaves 22 and 27 are thus rotated, by means of power transmitted through the pulley 20, and gears 17 and 18, the hoisting rope 28 will be raised, the several parts remaining in their operative adjustment so long as the pull on the rope 37 is continued and the friction wheels 21 and 26 held in contact. WVhen, however, the rope is released, the parts are returned to their normal position by means of the coiled spring 39, one end of which fits around and impinges against an enlargment formed on the arm 39, and the other against a similar enlargement formed on the arm 30, the tendency of the spring being to force the latter forward into its upright position, and thereby separate the friction wheels 21, 26, and the rope sheaves 22,27, as illustrated in Figs. 1 and 3.-

As illustrated in Fig. 8 of the drawings, the device may be so constructed and arranged that a pullon the rope 37 in either direction, will operate to throw the several parts in their working positions, so that instead of securing the bed plate 12 to the floor, as previously described, it may be supported on or hung from the ceiling or overhead platform.

In case it be desired to have the machine operate either from the floor or ceiling, the vertical arm 40, cast or otherwise formed on the cylindrical bearing 24, will be provided with two recesses in which fit the ends 4142 of the bifurcated lever 43, the same forming one arm of the toggle, the frame 44 forming the other arm thereof, one end of said lever 43 being pivoted on the bolt 46 forming the front cross bar of the frame or lever 44, the rear end of the latter being supported by means of the screw 45 passing through the rear cross bar 33 of the frame or lever 44 and fitting in a recess formed in the vertical arm 29, formed on or cast integral with the cylindrical bearing 15.

From the foregoing it will be understood that when the lever 43 is either raised or low ered, the vertical arm 40 will be forced rearwardly, bringing the frictional wheels into contact, and causing the sheaves to grip the hoisting rope. as before described. the spring 39 returning the parts to a position of test when the rope 37 is released and the two arms of the toggle allowed to assume their horizontal positions.

Other modifications may be made in the device, as for instance, in Figs. 6 and 7 I have shown three rope sheaves instead of two, namely, sheave 47, corresponding to the sheave 22 of Figs. 1, 2, 3 and 4, and sheaves 48 and 49, the sheave 48 being placed directly above the sheave 49 in order that the hoisting rope 28, in passing between the three shall be given an extra turn or bend, and thereby held tightly gripped by said sheaves. If the device be thus constructed with the three rope sheaves, it will also be provided with the three-frictional drive wheels, to wit: 50, 51 and 52, the wheel 51 being secured to one end of the shaft 53, to frictionally contact with the wheel 50, and the sheave 48 secured to the opposite end of said shaft to grip the hoisting rope 28 between it and the sheave 47. The friction wheel 52 is secured to one end of theshaft 54 to also contact with the wheel 50, the sheave 49 being secured to the opposite end of the shaft 54, in order to grip the hoisting rope 28 between it and said sheave 47. These shafts 53 and 54 are journaled in the cylindrical bearings 55 and 56, respectively, formed on or secured to the vertical frame 57, through the central portion of which passes the rod 58, and on which said frame 57 is permitted to slide in a horizontal direction. hen this frame is forced backwardly on the rod 58, it carries with it the rope sheaves 48 and 49, which as before described, grip the hoisting rope 28 between them and the sheave 47. The friction wheels 51 and 52 are also moved rearwardly into contact with the friction wheel 50, thereby throwing the device into operation.

The parts are returned to their normal positions by means of the spring 59, coiled around the bar 58, one end of said spring impinging against the cylindrical bearing 15, and the opposite end against the frame 57, the tendency of the spring being to force the latter forwardly in a direction away from the sheave 47 and friction wheel 50.

Instead of having the shifting device constructed as before described, it also may be modified as illustrated in Figs. 6 and 7,

wherein it consists of the bifurcated lever 60 9 pivoted at 61 to the bar or rod 58, the forward end being formed with a ring 62 to which the operating rope 37 is secured. This bifurcated lever, as in the former instance, forms one arm of a toggle, the ends 62, 63 being formed with recesses in which to receive the trunnions 6465 formed on or secured to the triangular lever 66, which forms the other arm of the toggle. The triangular lever has its forward end or corner rounded as illustrated in dotted lines, Fig. 6, and adapted to fit in recesses formed in the vertical frame 57 to receive it.

In practice when the lever 60 is lowered, the end 63 will be raised, thereby raising the trunnion 65 and operating with the triangular lever 66 as a toggle, the result being that the frame 57 carrying with it its attached friction wheels and rope sheaves, will be forced backwardly as before described, the frame with its attached parts being returned to its normal position by means of the coiled spring 59. The same result will be produced should the arm or lever 60 be raised, the end 62 of said lever being lowered and carrying with it the trunnion 64, the frame in this instance being forced backwardly in exactly the same manner as when said lever 60 is lowered. Again, this shifting device may also be substituted by what I term a circular toggle, illustrated in Figs. 9, and 10, wherein one end of the rods or pins 70 will fit in recesses formed in the frame 57, their opposite ends fitting in similar recesses formed in the disk 71 rotating loosely on the rod or bar 58, these ICC rods or pins being arranged in a circle and in a slanting position when the machine is at rest, as illustrated in Fig. 10. If the disk 71 be partially rotated by means of the handle 7 2, Fig. 10, the pins 70 will assume positions nearly or quite parallel with the shaft 58 as illustrated in Fig. 9, forcing rearwardly the frame 57 as before described, and throwing the several parts into their operative positions. If the handle 72 be released, the spring 59, arranged as before described around the bar or rod 58, will return the parts to their positions of rest. Again, instead of relying upon the frictional contact of the driving wheels, to operate the device, I may provide their outer edges with the teeth 73, as illustrated in Fig. 11, whereby when the parts are thrown into operative position, the drive wheels 74, 75, 76, willin addition, be rotated not only by frictional contact, but also by means of the teeth on the wheels 75, 76, meshing with those on the wheel 74.

It will now be understood that the device is exceedingly simple in construction, consists of but few parts, economical to construct and arrange, compact in form, and that when the hoist is at-rest, the frictional drive wheels, as well as the rope sheaves, are separated and rotation thereof prevented, so that the device when at work or at rest is practically noiseless. Furthermore, by constructing and arranging the device as described, the shifting devices are centrally located, thereby causing an equal pressure to be exerted on the rope sheaves and the frictional drive wheels when the same are forced rearwardly into operative positions.

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

1. In a device of the character described, the combination with a bed plate provided with a stationary cylindrical bearing, of a rotating shaft journaled in said bearing and having tightly secured thereto and near one end thereof, a frictional drive wheel, and at the opposite end a rope sheave, a support movably mounted on said bed plate and provided with a cylindrical bearing, a rotating shaft journaled in said latter bearing and having secured thereto a frictional drive wheel in alinement with said former drive wheel, and a rope sheave in alinement with said former rope sheave, means for moving said latter shaft rearwardly, thereby throwing said drive wheels and rope sheaves into operative positions, and a spring acting on said bearings for returning the several parts to their normal positions of rest, substantially as described.

2. In a device of the character described, the combination with a bed plate provided with supports carrying a rear cylindrical bearing, a rotating shaft journaled in said bearing, a frictional drive wheel secured to said shaft near one end thereof, and at the opposite end a rope sheave, a forward cylindrical bearing movably mounted on said bed plate, a shaft journaled in said forward bearing and having secured thereto and near one end thereof, a frictional drive wheel, and at the opposite end thereof a rope sheave, a toggle, one arm of which is fulcrumed on said rear bearing, and the other arm on said for- Ward bearing, whereby when said toggle is operated, said forward bearing is moved rearwardly, and a spring operating onsaid bearings to return said forward bearing to its normal position, substantially as described.

3. In a device of the character described, the combination with a bed plate provided with supports carrying a rear cylindrical bearing, a shaft rotating in said bearing and having secured near one end thereof a frictional drive wheel, and at the other end a rope sheave, a forward cylindrical bearing movably mounted on said bed, a shaft rotating in said latter bearing and having secured thereto near one end thereof a frictional drive wheel, and at the opposite end thereof a rope sheave, shifting devices located centrally between said rope sheaves on one side of the device and frictional wheels on the opposite side of said device, whereby to force said forward bearing rearwardly, and means for returning the parts to their normal positions, substantially as described.

4. In a device of the character described, the combination with a bed plate, of a rear rotating frictional drive Wheel and rope sheave mounted thereon, of forward friction wheels and rope sheaves movably mounted on said bed plate, shifting devices centrally located on said device and adapted to move said forward friction wheels and rope sheaves rearwardly, and spring actuated means for returning the parts to their normal positions of rest, substantially as described.

Signed at New York, borough of Brooklyn, in the county of Kings, and State of New York, this 5th day of March, A. D. 1907.

DANIEL ARTHUR.

Witnesses:

M. VAN NORTWIGK, JOHN B. WHITE.

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