US71257A - Improvement in harvester guard-fingers - Google Patents

Description

@uitrit gratos` @anni @titre .WILLIAM ANSON .Vl/'001), 0F HOOSICK FALLS, NEW YORK.

Letters Patent No. 71,257, dated`Novcmbe'r 19, 1867;

IMPROVEMENT IN HARVESTER GUARD-FINGERS.

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Be it known that LrWrnnr'nM'ANsoN Woon, of Hoosick Falls, county of Rensselaer,and State of New York, have invented certain new andusei'ul Improvements in the Mode of Constructing Guard-Fingers for Harvesting Machines, and I do declar'ethe following to be a full, clear, and exact description ofthe construction and operation of the same, reference being had teithe accompanying drawings7 making a part of this A specification, in which- Figure 1 represents the lower portion'of the guard-linger before the cap and lining to the cutte/r cavity is fastened to it, and is a top view thereof.

Figure 2-is a longitudinal sect-ion through the centre of tig. 1.

Figure 3 is a side view of the piece which forms the cap, and the lining to the cavity through which the cutters vibrate. l

Figure 4 isa longitudinal section of the guard-finger, when completed, through the centrethereof.

Figure 5 is an elevation of` the chill used in casting the lcap and lining piece, when the same is made of Acast iron.

Figure l'iis a transverse section of fig. 5.

My invention relates to the combining, in the construction of guard-fingers for harvesters,y two kinds of metal, or two varieties ofthe same metal, insuch a way that the larger portion thereof shall have for its char, acteristic quality toughness or strength, to withstand the strain of constant use and the shocks of accidental collision with foreign matter, to which, from the nature ofthe case, it must be subjected; while the'other portion has for its characteristic quality, hardness, to make a sharp cutting edge, to withstand the vibrations ot' the cutters, and their action thereon, in severing the stalks ofthe crop to be eut; the whole forming a cheap, efectivo, and durable guard-finger.

A To enable others skilled in the art to make and use my invention, I will proceed to describe the same with referenceto the drawings.

A is the main part ofthe guardinger, made of malleable or wrought iron, as the case may be, provided with a hole, a, at its heel, for the reception of the bolt, to hold it to the linger-bar, and may be attached tothe nger- 'bar in4 any ofthe well-known ways, and is' constructed, ,as shown ings. l and 2, with a solid point, but is-hollowed out from a point, just in front of the point of the cutter, to the heel of the guard-linger, orto a point near to where it joins the yhoger-bar. B is a piece of east chilled iron or hardened steel, which is made in such form that its lower surface ts into the upper surface, made for its reception in the -Inain part of the guard-finger A, the depression b, in the main part, receiving the swell e of the harder partB. The cavity or depression d in the main part A of the finger towards the point, receivingthe round part e of the portion B, while the projection f passes through the hole g in B5 or, if deemed advisable, a rivet may be used, passing'through both A and B, instead of the projectionf. In case malleable iron is used, the .projectionfis preferable, as 'it'can readily be headed down and used in place of a rivet, and save drilling for a rivet. On each side of the depression eZ is left a lip, t, and of su'ch height and thickness that, after the piece B is inserted, these two lips may be readily closed down over the end e of the par't B with a hammer, makingal closefit, and holding the forward end of the cap or hardened piece securely in its place, while its rear end is held either by heading 'down the projection f into the countersunk portion of-the hole `q,'or by passing through both a rivet, and riveting each end thereof. Figure 4 shows the two pieces fastened together and the guard complete. e i

As beforer stated, this style of guard-nger maybe made from malleable or wrought iron, for the main part,- combined with common chilled cast iron or, hardened steel for the other, or any substance lwhereby suilicient strength is attained `in the one, and a durable cutting edge in the other. My preference, however, is for a malleable lower part for securing strength, and an upper part, c'ast over a chill of cast iron, of goodquality.l When this material is used, the chill U, figs. 5 and 6, is inserted in the sand in the usual way, and thus the interior surface of the cavity a' is made as hard as hardened steel; and when the guard-finger is properly ground, theedges of the guard-nge1'cxposed to the knife,will present an edge which will not be rounded over by use, or 'be' eut into by the knife, as is frequently the case, and thereby 4stop entirely the action ofthe cutters. IIt is also desirable that that portion vot the guard-finger which overliesthe cutters should be hard for, although the most of the crop is cut between the lower limb of theVguard-nger and the cutter, yet the top portion, or that portion which overlies the cutters, has also to do its share towards holding up the crop to be cut, and not unfrequently in stony or uneven lands the cutters are forced up, either by the small stones getting under thea cutter or by the rolling o1 twisting of the finger-bar, so as to bring the cutting edge in contact with the upper limb or cap of the guardfdnger. Of course, if the upper limb is made hard, there will be as good a cutting edge above as below the knife, and thus all emergenciesv of this kind will be provided for.

I am aware that guard-fingers have been made of two kinds of material, one soft and another hard, and the cutting cavity through which tbe cutters vibrate has been lined with hard iron or hardened steel, and I do not claim this device broadly; and I do not claim the simple lining, asv the'cap or upper limb is too thin to admit of any practical lining. My plan 'is to make the whole guard-cap or upper limb of the guard-finger, together with the facing of the `entire cavity, of one'kind of metal, and in one piece, and the remainder of the nger of another. v

Having thus fully described the nature and object of my invention, what I claim therein as new, and desire to secure by LettersV Patent, is- I 1.v Inserting in the main body of a guard-finger for a harvesting machine a piece of metal, harder than the main body of the guard-finger, when.the piece so inserted shall form the entire guard-cap, and also a complete lining to the cutting cavity, through which the cutters vibrate.

2. Constructing a guard-nger with lips L 7L, in combination with the hardened piece B, or their equivalents, substantially as and for the purpose set forth;

l ,WM. ANSON WOOD.

Witnesses: l

C. A. CHENEY', JOHN E. WILcoX'.

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