US1232051A - Chain for mining-machines. - Google Patents

Description

I Patented July 3, 191?.

H A KUHN CHAIN FOR MINING MACHINES. APPucAmw man MAY-1a. 1914.

l awm "may a. noun, or PITTSBURGH, rnnnsvnvan'ini.

I To all whom it may concern:

' cutters or a suitable chain suitable rolled State of Pennsylvania,

Be it known that'lI, HARRY A. KUHN, a

citizen of the UnitedStates, and resident of Pittsburgh, in the county o'tAlleghenyand have invented a new and useful Improvement in Chains for Mining-Machines; and I do hereby declare the following to be a full, clear, and exact descri tion thereof.

y invention relates to chains for mining or like machines where said chains are driven by sprocket wheels, and are mounted in guides, and where the flights carrying the dislodging devices are connected at' intervals to said chain and adapted to enter the mass of coal and dislodge the same.

The object of bit on the end of a cutting tool as if the bit were a part of a chain traveling in tension and to provide for the relieving of the strain on these flights and'for theholding of the links in alinement, so that the links are held from bearing against the chain guides and creating riction which retards the movement of the chain .and increases the power required to drive the same.

' In the accompanying drawing, Figure 1 is a. plan view of a portion of a chain show ing my improved .chain arranged-therein; Fig. 2 is an outside edge view partly in section; Fig. 3 is a section on the line 3-43, Fig. 1; Fig. 4 is a section on the line M Fig. 2, and Fig. 5 is a modified form of my invention.

In the drawing, the numeral 2 designates guide which is made up of sections and comprises the bottom plate 3, the channel member 4 and the angle member 5. The angle-member 5 is supported on the channel member 4;- and has the downwardly extending flange 6 which leaves the opening 7 for entrance to the space 8 containing the chain 9. The

chain 9 is made up of links in the usual manner connected by the bolts 10. The lower links'll are thicker than the upper links 12 and said lower links are adapted to rest on the bottom plate 3 of the cham guide. The lower links lfnave the lugs 13 which project out through the opemn 7 and pivotally secured to said lugs by t e bolts 14 are the flights 15. The flights 15 have the arms 16 which carry the idle rollers 17 which bear against the flange 6 of the angle member 5. The idle rollers 17 are held within the bicnam ron MINTNG-MACHINES.

Specification of Letters Iatent.

my invention is to make the flight as effective as a chain guide.

Patented-July a. we *2.

Application filed May 18, 1914. Serial No. 839,336.

furcated end portion 18 of the arm 16 and the lower portion of said bifurcated end has i the PIOJBCtlOIl 1.9 which extends within'the opening 7 and is adapted to bear againstthe lower link 11 of the chain and thepivotal point of said link. 11 at this point has the flat face 20 with which the projection 19 engages. The flights 15 are provided with the cutpreferably at ters 21 which are secured thereto by bolts or if desired, said cutters may be formed integral with the flights. The flights 15 form part of a conveyermechanism in connection with a' mining-machine such as set The said link forth and claimed in an application of mine of even date'herewith, Serial No. 839,325, and said flights move over the pan 23. Where the chain is employed in connection with the dislodging and conveying away of coal which has been undercut, and then separated along its lines of cleavage, so as to drop into the undercut, the said chain is adavanced into the coal and the flights with the cutters 21 pass in under the coal and thecoal is dislodged, and, by the movement of the flights 15, is moved along the pan 23 to be conveyed back to the pitcar in the rear of the machine, all as clearly set-forth in the above application. As the force the flights backwardlyand by having flights enter the coal, the strain will tend to the arms 16 which engage the chain guide, l

I obtain a greater levera e corresponding reduction 0 the strain on the flights as well as on the chain carrying the same. Where the flights are moving on the straight jections 19 engage the links 11 and prevent the chain from buckling. or kinking, and the links of the chain are held from moving in frictional contact with the inner face of the flange 6, thereby reducing the friction, and the power required to drive the chain. The arms 16 are slightly curved so as to conform substantially to the curve of the In Fig. 5, I have illustrated a modified form of my inventionin which the arm 16 projects rearwardly sufliciently to engage the succeeding flight carrying link at a point between the pivots. The projection 19 engages a shoulder 20 on the link 21% By engaging the link between the pivots there is no opportunity for the buckling of the chain.

What I claim is:

1. In a mining-machine, the combination and'there is a I portion of the chain-guide, the pro- 4 of a chain-guide, a chain therein,

flights pivotally connected to said chain,

and reargaglng said chain-guide and said chain at polnts between the chain-link pivots of the following link.

2. In a mining-machine, the combination of a chain-guide, a chain thereln, flights chain, rearsaid chain.

3. Ina mining-inachine, the combination of a chain-guide, achain therein, flights pivotally connected to said chain, inwardly en- .tendmg arms in said flights engaging said I chain-guide, a projection onsaid arm enterextending arms on said flights ening said chain-guide, and engaging the lower links of said chain.

4:. In a mining-machine, the combination of a chain-guide, a chain therein, links on said chain having lugs projecting out from said chain-guides, flights pii'otally connected-to said lugs, rearwardly extending arms on said flights engagingthe chain-guide and projectionson said arms engaging the links point between the pivots on said chain at a of the link. succeeding flight-carryin link.

In testimony whereof, I the'said nnr aio A. KUHri-ihave hereu' to set my hand.

. ,HARRY A. KUHN.

- Witnesses:

JOHN F. WILL, RoBnD. To'rrEN."

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