US2399166A - Cutter chain - Google Patents

Description

April 30, 1946. J. R. CARTLIDGE I 5 CUTTER CHAIN Filed Jan. 18, 1943 INVENT BY wq AM Patented Apr. 30, 1946 PATENT OFFICE "CUTTER CHAIN John R. Car tlidge, Cincinnati, Ohio, assignor to The Cincinnati Mine Machinery Company, Cincinnati, Ohio, a corporation of Ohio Application January 18, 1943, Serial No. 472,691 7 2 Claims. (01. 74-251) My invention relates to cutter chains for mining machines and particularly to the pintle means for fastening the same which joins the bit carrying link to the connecting links.

Inasmuch as cutter chains of the above type aresubject to very heavy and rough wear, it has been found advisable to position the pintles in theside bars of the bit carrying link so that they will not revolve. This type of pintle and the mannerof retaining it in position are disclosed and described in United States Letters Patent 2,280,502, issued April 21, 1942, to Edwin P. Steng'er.

It is an object of my invention to provide a pintle retainer for use with a non-revolving pintle, such as described in the above patent, and which prevents the pintle from endwise or longitudinal movement after it has once been placed in position.

It is a further object of my invention to provide such a pintle and retainer wherein the retainer completely seals the pintle in position and thus prevents the entry of moisture with its resulting tendency to etch away any part of the pintle and permit it to slip out.

These and other objects of my invention, which will be set forth hereinafter or will be apparent to one skilled in the art upon reading these specifications, I accomplish by that certain con struction and arrangement of parts, of which I shall now describe an exemplary embodiment. Reference is made to the drawing which forms a part thereof and in which:

Figure 1 is a side elevation of a cutter chain including a bit carrying link and connecting links.

Figure 2 is a perspective view of the pintle shown in Figure 1 and before being placed in position.

Figure 3 is a cross-section of the cutter chain and a link with my pintle and. pintle retainer in position, taken on line 3-3 of Figure 1.

Figure 4 is a section on line 4-4 of Figure 3 through the link, pintle and cast pintle retainer.

Figure 5 is a plan view of my pintle before the retainer has been cast therein.

Figure 6 is a perspective view of a. cast pintle retainer.

Briefly, in the practice of my invention I provide a pintle having such a cross-section that it will not revolve or turn in the spaced side bars of the bit carrying link and as exemplified by the pintle in the above referred to Patent 2,280,502.

In order to prevent my pintle from sliding longitudinally out of the apertures in'the side bars, I have provided a channel longitudinally in the side of the pintle which doesnot receive active wear, and I provide a countersunk hollow or bevel at the ends of this channel as well as one or more indentures within the. channel. The portion of the apertures within the side bars registering with the bevel at the ends of the channel in the pintle is also beveled in a some what similar manner as that shown in Figures 1 and 2 of Patent 2,280,502. a

The pintle is inserted in place in a similar manner as shown in Patent 2,280,502 and then an alloy, havingfa relatively low melting temperature, is poured into the space formed by the channel of the pintle and. theedge of the apertures in the side bars. Fromthis it is apparent that since the aperture in the connecting link is circular, that the complete space between the. pintle and the apertures in the side bars and the connectinglink will be filled withthis alloy. When the alloy hardens, it is apparent that the cast retainer will fill the indentures in the channel as well as the space between the pintle and the circular aperture in the link, which willprevent longitudinal movement of the retainer as well as of the pintle. Also, the head formed on the retainer by reason of the beveled portions of the channel will assist in preventing longitudinal movement of the retainer and the pintle.

I do not wish to be limited to any specific form of cast retainer or any specific configuration of the pintle, since it is apparent that numerous difierent shapes may be used, and it is only necessary to have apertures or cut-outs which, when filled with cast metal after the pintle has been placed in position, will prevent its longitudinal movement. 7

, Referring to the drawing, I provide as an exemplary embodiment a pintle 4 having a channel 6 cut therein on its flattened face 5. I also provide indentations l0 within the channel as can be clearly seen in Figures 2 and 5. The ends of the channel 6 are beveled as at 12 and the shoulder 8 of the side bar aperture contains a registering beveled portion II.

As seen from Figure 3, as well as Figure 1, the pintle 4 is inserted through the apertures I in the side bars 2 and through the circular aperture l3 in the connecting link 3.

Any alloy or Babbitt metal having a melting point sufiiciently low as to prevent changing the temper in the machined parts may be used. As an example, Babbitt metal having a; melting point of 500 F. has been used successfully. The alpintle 4. It is also apparent that the portion [4 of the cast retainer which consists of frozen ale,

10y is so positioned in reference to the circular aperture [3 that it is not positioned on'the ,active wearing surface of the :bearing "on-pintle.

In order to remove a pintle, it is necessary merely to drive the pintle onthrough with a sledge hammer. This, of course, shears portions of the cast retainer, which are relativelyscifth and permits easy removal. Anew pintle is then put in placeand anew retainer poured. j

7 As willbe apparent, it isposs'iblato place a channel onidifferent portions of the pintle. it is evenpossible'to drill a channel through the pintle and have branches'communicating with the space. between thecircular aperture [3' to the connecting'link'3 and the pintle 4. It is also possibleyto use a channel which does not go' completely through the pintle, but merely'cormnunicates with oneend thereof anda closed aperture betweenthe side bars so' that-the pintle, the bearing surface of" the connectinglink, and the side bars; will form a" mold for the retainer.

I haveifound-that 'my novel retainer safely holdsflthe pintle-against endwisemovement, and safely-retains it"in" position at all'timesduring the'operation'of the cutter chain. I have also found that the use of arelatively soft alloy-seals the channel and prevents 'excessive etching of the cast-retainer 'due to the acids in the water contained :within a mine shaft.

It is to be understood that modifications may be made in my invention without departing from the spirit thereof and I do not intend to limit myself otherwise than in the claims which follow.

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

'1; In ,a'mini-ngymachine cutter chain, avbit carrying link: haying:v spaced side. bars permanently held in position between which a connecting .link is introduced, said side bars having aligned segmental shaped apertures and said connecting "link having a circular aperture, a pintle having asegmentalcross-section positioned within said raperture, :means .for preventing longitudinal V :movement'..oit said'lpintle which comprises a 1ongitudinal channel in the flat surface of the pintle defined by the chord of the segment, pockets in the, pintle: communicating with said channel and.

alloy metal within said channel, pockets and said circular aperture unfilled by said pintle.

'2. In a chain-or the-like; relativelypivoted structures, one comprising a-perforated' link, and the other a pairof 'perforated-bars, one'lying on each side of thelink with the perforations of the several elements in alignment, a pintle extending through thesaid perforations'and pivoting the structures, said pintle-being cut away at one side, and'a'pintle'-retainingmember in'the formof a cast-in-place structure: of" relatively lower'melting point metalextendingthrough said perforations with said pintle, and'having such engagement with said pintle and said'barsfasto prevent relative longitudinal movement or vsaid pintle retaining member; and saidtpintlethaving at least one recess-extending inwardly toward itscenter'from the cut-away portion, saidp'intle retaining member also filling said recess,

" JOHN 'CARTLIDGE.

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