US60372A - Nathan m - Google Patents

Description

@uitrit tutes @sind ffirr.

iursovnMrNT ni STUMP nxrnicrons.

@the .rbehnle referat in .in there trtter atmt `:mit making part nf the tame.'

TO ALL WHOM IT MAY CONCERN: y y

Be it known that I, NATHAN M. HEALY, of Flushing, in the county of Genesee,.and State of Michigan,

have invented a new and improved Stump Extractor; andI do hereby declare that the following is a full, clear,

and exact description thereof.

The nature of this invention 'consists in so arranging an upright hoisting-bar and levers on anupright` l frame, and operating them by chains and ropes, that a. very great lifting power shallbe imparted to `thebar, thereby enabling me to extract stumps from the ground in a cheap and simple manner.

To enable others skilled in the art to make and use my invention, I will proceed `to describe 'the same,` reference being had to the accompanying drawings which form a part of this specification, `and to the lettersiof reference marked thereon. i i

Figure 1 represents a. front elevation of .the machine. Figure 2 is a vertical sectional elevation through the line x :c of fig. 1. Figure 3 is a view of the hold-fast bar; and` Figure 4 isa top or plan view of the machine. The same letters of reference refer to like parts.

A represents runners, or foundation-timbers of the machine; B, the posts or supports, standing-in a 1` bracing or inclined position from the corners towards the centre. C represents the cap-pieces, resting horizontally on the top of Bf I) is an upright piece attached to oneot` the cap-pieces C; E is'the hoisting-bar,

to which the power exerted on the lever is applied. Frepresents the levers. G, the chains which communicate the power from the levers to the hoisting-bar. H is the rope (orchain)`to which the power is applied which operates the machine.' I is a rope by which theouter ends of the levers are elevated. The hoisting-baii being of properlength andsize, has a strong hook upon the lower end, (the-bar standing in au upright position, but hanging loosely,) to which the chain is attached that is fastened to the stump when the machine is in use. The edges of this hoisting-bar are notched, ratchet-like, as at c", the notches being at suitable distances l apart, and alternating from one side to the other, so that the bar may be sustained from either edge, and` the shoulder, or the deepest part of the notches, shall not he directly opposite.` l-There are two pulleys i or;` sheaves near the lower end of tliisbamone on each side, opposite each other, and working on the ends of the 1 same pin.l The hold-fast bars, (which act like pawls in a ratchet,) are simply pieces of round iron, with the i ends turned up, and rest in` recesses formed in blocks, which are ixed upon the cap-piece C. These hold-fast bars A E are represented by the iig. 3, with a section. The blocks having the recesses in which these 4bars rest, are i represented by the letter C. The recesses incline inwardly as they descend, so that the holdfast bars constantly rest againstthe hoisting-bar, and drop intolthe notches on the bar by their own gravity, the bar playing up y and down between them.l There arefour posts or braces to theV frame, two in frontand two in rear, each pair supporting one of the caps C. These caps C support the blocks G', and also the boxes for the lever fulcra J. The levers F work upon fulcra J. The inner ends of these levers formeircles, the4 fnlcrum being placed below i `1 the centre, so that the end formsan eccentric. The periphery df this circle or ,eccentric is grooved or hallowed out. The outer ends have pulleys or sheaves attached to them. The chains`G have long links at their lower y ends, which surround the hoisting-bar,and which lift against the shoulders or notcheswin the bar, upon opposite sides, as seen ih the drawing. The other ends of these chains are firmly attached to .the top` of the levers F, l resting in the grooves before mentioned. The power of the levers is transmitted to the hoisting-bar by these z chains. The upright piece D, which is attached to the rear cap-piece` C, has 'also tw'o pulleys, one on the upper f i .y end, and the other pulley just below it. The rope H (it may be a chain) is first` attached to thelowe end "of i` the hoisting-bar, drawing against the lowest notch in the bar. It `then passes upward and around the pulley on the end of one of the levers, at a, thendown under one of the pulleys, near Athe lower end of the`hoisting-ba.`r,

at b then upwards and around the 'pulley on the other lever at c and then down and around thefothier pulley` l on the hoisting-bar, extending thence in a horizontal direction, when in use, and to which the power is attached` which operates the machine, The ropes and k are attached to each of` the levers, at d and The` rope i `passes from d over one of the pulleys on the upright pieces D, and the rope k passes from the other lever, at f,

, over the other pulley on D. These ropes join at n, and are operated by I. Itwill be seen that, by pullingupon` 'the rope I, the ends ofthe levers will be elevated. This is done whenever it is necessary to lower the hoistingbar to take a new hold. 'lhc operation or effect of drawing upon the rope will be, to depress the ends of the levers and draw them together. This, of course, draws upon the chain G, and the effect is to raise the hoistingbar E. The hold-fast bars, lying loosely against the edges of the bar, drop into the ratchets or notches, and when the power ceases to be applied, they (either one or the other,)catch the bar and hold it. It will be noticed that these levers act with the greatest power as they descend, it being an increasing force, and this being the `case :it n, time when the greatest force or power 'is necessary, (that is, after all the slack has been teken up.) The advantages-of my arrangement will be understood at once. Y

Having thus described my invention, what Iclaim as new, and desire' to secure by Letters Patent, is-

The hold-fast bars E', slotted blocks C', levers F, and chains G, in combination with the notched bar E, Cap-piece C, upright D, inclined supports B, and runners A, arranged and operating substantially as herein shown and described.

NATHAN M. HEALY,

Witnesses:

JOHN HUNTER, E. GRAY.

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