US70122A - Improvement in hoisting appaeatus - Google Patents

Description

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To ALL WHoM Ir MAY coNcEnN:

Be it known that I, J. F. ROCHOW, of No. 213 East Broadway, in the city, county, and State of New York, have invented a new and improved Hoisting Apparatus :1nd Power-Gear; and I do hereby declare that the following is a full, clear,` and exact description thereof, which will enable those skilled in the art to make and use the same, reference-being had to the accompanying drawing forming part of this specification, in which- Figure 1 represents' a longitudinal central section of this invention, the line a: a', fig. 2, indicating the plane of section. Y

Figure 2 is a transverse vertical section of the same, the plane of section being indicated by the lineyy, fig. 1r

The remaining figures are modifications of the same, showing its application to diiferent machines, which will be referred to as the description progresses.

Similar letters of reference in these views indicate corresponding parts.

This invention consists inl the arrangement of acrank-shaft, on the wrist-pin of which are mounted loosely two cog-wheels or pinions, which are secured to or cast solid with one and the same hub. One of these pinions meshes in 4an internal gear, which is either rigidly connected'with the frame of the apparatus, or so arranged that it can be held stationary while the second pinion meshes in a gear in the interior of a rotary drum, and the proportion of' these pinions and their respective gears is so adjusted that by imparting a revolving motion to the crank-shaft a slow and powerful motion is imparted to the'drum, anda hoisting apparatus is obtained which is very compact, strong, dura-ble, andfapplicable to a greatanany different purposes. Y

A represents a frame, of cast iron, or any other suitable materiah-and provided with boxes B, which form the bearings for the gudgeons of the drum D. One ofthese gudgeons is boredout to receive the shaft C, I

while the other gudgeon is bored out to lit upon the hub of the stationarygcar E, which hub is bored out to admit the shaft C, as clearly shown in tig. 1 of the drawing. The stationary gear. E is held in position by a gland, F, which is secured to the frame A by screws 'or in any other suitable manner, and in which the hub of said stationary gear is fastened by a key or any other suitable means. The shaft C is provided with av crank, G, and on the wrist-pin of this crank are mounted two pinions', HI, which'are rigidly secured to or cast solid with one andthe samehub, J, that turns loosely on the w1ist-pin of the crank. The pinion 4I meshes into the coge of the internal geariE, and the. pinion H into an internal gear, K, on the inner surface of the drum D. On the outer circumference of this drum winds the hoisting-rope or chain.- The proportion of the pinion I to the sta tionary gear E is different from the proportion of the pinion H to the internal gearK.

The operation is as follows: If the pinion I has eight cogs, the stationary gear fteen, the pinion H ten, and theinternal gear K eighteen, and if a revolving motion is imparted to the shaft C, each revolution of-said shaft produces g5 revolutions ofthe pinion I, and since this pinion is rigidly corinected to the pinion H, this pinion also makes 1g? revolutions, or, in other 'words, it advances g5 10=18 cogs. If the proportion were such that the pinion H-would advance only eighteen cogs, the drum D'would remain stationary; but since said pinion advances eighteen and three-fourths cog's,the drum has to advance three-fourths of a cog for each revolution of the shaft C, or it has to make one twenty-fourth of a revolution, giving a purchase of Atwenty-four to one; If the pinion I has nine, and the pinion H eleven cogs, the numberof revolutions of the pinion I for each revo lntion vof the shaft C is equal to Vlg, and the pinion H advance gXll :18% cogs for each revolution ofthe shaft,

and consequently the drum has to advance one-thirdv of a cog or one fifty-fourth of a revolution for each revolution of the shaft, giving a purchase of fifty-fourto one.

From these examples it will 'be Areadily understood that by a slight change in the proportion of the gears a hoisting apparatus can be made with any desired purchase. The apparatus is very simple in its construction, easily put up, and it is applicable to a great many different purposes.

In Figures 3 and 4 I have represented my hoisting apparatus in connection with a steam engine, and in -this case the crank-shaft C may be made to extend only partially through the drum, with a bearing in one head only.

In Figures 5 and 6 a hoisting apparatus is represented, which is constructed like that shown in gs. 1 and 2, but arranged to be operated by a belt and pulleys.

In Figures 7 and 8 I have shown my invention in its application to a hand-hoisting machine, and in this case the stationary gear E is not rigidly attached to the frame A, but it is held by means of a brake-wheel and lever,- and by releasing the brake-wheel the gear E is released, and the drum D is free to turn back.

In Figures 9 and 10a similar apparatus is shown, which is intended particularly for a truck-holster. In this ege the stationary gear is released by. a vspring-lerer or clutch, so that the drum can be allowed to turn back or `arrested at any desired moment.

Figures 11 and 12 show the application of myinvention toa crane, and in this'case the drum D is provided with two or more different speeds which connect in such a manner that the hoisting-rope or chain can be readily changed from one to the other, according' to the power required.

Figure 13 represents a longitudinal central section of the internai gear of my hoisting apparatus. While in figs. 1 and 2 bevel-gears are used, the gears used in g. 13 are dat, and the drum is madewith two speeds, as in gs. 11 and 12.

The same apparatus is also applicable as a power-gear for turn-tables, draw-bridges, turning-lathes, and

other machines Where great force is to be exerted with a comparatively small expenditure of power. In these cases the drum D will be replaced hy a cog-wheel or pulley, with an internal gear to mesh into the pinion H, or the internal gear K may be secured to a shaft, which serves to transmit the motion.

What I claim as new, and desire to secure by Letters Patent, isl The crank-shaft C, carrying pinions or cog-wheels H I, in combination with the gear E and internal gear K, all. constructed and operating substantially as and for the purpose set forth.

J. F. noel-low.-

i Witnesses:

W. HAUFF, RUDOLPH Wiisrn.

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