US945335A - Cutter-chain. - Google Patents

Description

N. D. LEVIN. CUTTER CHAIN. APPLICATION FILED MAY 6,1908,

Patented Jan. 4, 1910.

"un'rran s ratus raruntr tilil it fitt.

'NILS DAVID LEVIN, 0F COLUMBUS, OHIO.

CUTTER-CHAIN.

To all whom it may concern:

Be it known that l, l\"n.s 1). LEVIN, a citi' zen of the United States, residing at Colum bus, in the county of Franklin and State of Ohio, have invented certain new and use lul Improvements in Cilttei'-(1liaiI1s, of which the following is a specification.

The invention relates to chains tor supporting coal bits and similar cutting members. The invention has for its primary an jects; the provision of improved means for preventing the bits from tilting backwardly during the cutting operation, and of means whereby the cutters may be held in a predetermined position relative to the material to be cut. One embodiment of the. invention is illustrated in the accompanying drawings,

wherein z- Figure 1 is a side elevation of the chain. F'gures 2 and 3 are sections on the lines IIII and III-III respectively of Fig;-

. ure 1.

c Figure 4 is a plan view of the chain.

Figure 5 is a side elevation of a moditicd form of chain.

Figure 6 is a. transverse section through Figure 5 on the line VL- VI, and

Figure 7 is a side elevation of another modified form of chain.

Referring first to the construction shown in Figures 1, 2, 3 and l, 1-1 are the cutter supporting links or blocks, which blocks carry the bits or cutters 2--2 and 3, .4 are the set screws for holding the cutters in position, 5 are the side plates constituting the links intermediate the cutter supporting blocks 1, and 6 are bracing struts prele ably made integral with the cutter blocks and extending; rearwardl therefrom, which struts are provided wit the transverse end pieces 7 for engaging the top of the adjacent links 5-5.

It will be seen that in the operation of the chain, the resistance of the material being ant 3 backwardly especially when an unusually hard body of material is encountered. In such backward tilting the block moves about a pivotpoint located behind the cutter, which causes the bit to rise and dig into the coal and break. The purpose of the rearwardly extending struts 6 is to prevent this back ward tilting of the cutters, and so insure Specification of Letters Iate nt. Application filed May 6, 1908. Serial No. 481,154.

i 1 t I i l Patented Jan 4, 1910.

a more rapid and uniform reduction of the material operated.upon, and prevent undue strain on the chain bits and other parts of the machine. i

it will also be seen that by oppositely disposing certain of the cutters in pairs, each one ot' which is equidistant from the vertical axis of the cutter block, in combination with the bracing struts rcl'crred to, balances the chain in such a manner that not only is rearward but also sidcwisc tilting obviated, and the entire series ot cutters hcld. in a predcterinined position relative to the material to be cut.

In Figures 5 and (l a modified arrangement is shown wherein additional bracing struts projecting from the trout sides of the cutter blocks l are provided. 'Ihecnds of both the 't'oru'ardly and rearwari'llt extending struts are provided with cross pieces 7 corresponding to the members 7 in the other form oi, device, and in other respects the construction is similar to the construc tion of Figures 1, 3, and t.

In Figure 7 another modilied arrangement is shown wherein the bracing strut J, preferably made integral withthe cutter block and extending rearwardly therefrom, rests upon the top of the following cutter block, 10.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent is the followingzy 1. in combination in a cutter chain, a pin-- ralit'y of links, cutter blocks intermediate the links and having projecting portions extending out past the outer edges of the links, braciilg struts on the projecting portions extendingrearwardly therefrom and engaging the outer edges of the links, and cutters mounted in the cutter blocks.

2. The combination with a chain compris ing blocks each carrying an outstanding cutter and pairs of UPI'JOSlIlg side bars constituting intermediate links, ofbracing'means for the cutter blocks comprising rearwardly extel'uling struts with engaging portions at their rear ends in position to engage the outer sides of both of the opbositc side bars.

3. The combination with a chain having cutter SUIHXHUHQ links and pairs of opposof forwardly and reerwardiy extending the blocks to the tops of the connecting bracing means on each cutter supporting link with engaging portions at their ends ada ted to engage the upper sides of both of t e opposing side bars between their ends. 4. In combination in a cutter chain, bit

I blocks, connecting links alternating with the bit blocks pivotally jointed to the ends of the blocks, bits in the blocks, between the pivotal connections thereof, and bracing means independent of the joints extending fromlinks.

In testimony whereof I have hereunto signed my name in the presence of the sub- 15 scribing witnesses.

NILs DAV-ID LEVIN.

Witnesses:

G- W. CUNNINGHAM, ALEXANDER P. LINDSAY, PAUL CARPENTER.

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