US1078082A - Cutting-bit for chains of mining-machines. - Google Patents

Description

. C. N. BARTON.

CUTTING BIT FOR CHAINS 0P MINING MACHINES.

APPLICATION FILED IEB.10, 1913.

1,078,082. I Patented No 11,1913.

CHARLES N. BARTON, or HARRISBURG, ILLI'NoIs, AssIGRoR or TED STATES PATENT OFFICE.

ONE-HALF '10 AMES B. .BLACKMAN, OF HARRISBURG, ILLINOIS.

CUTTING-BIT FOR GHAIN$ OF MINING-MACHINES.

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Specification of Letters Patent.

Patented Nov. 11, 1913.

Application filed February 10, 1913. Serial No. 747,397.

has for its primary object the provision of a bit which may be reversed in its mounting and which will be provided with a plurality of efiective cutting ends or points whereby when one becomes worn or destroyed, the l other one' may be readily and effectually presented for use.

Another object of the invention is the provision of means traversing the axis of the bit-way and provided with a coacting surface which may be advanced into mutual engagement with ,a similar surface of the bit and held, so as to hold the bit operatively projected to perform its function.

A further object of the invention is the provision of a bit having two of its surfaces provided with teeth; a mounting provided with a bit-way and having one of its walls provided with co-engaging teeth, and an iminging or'clampingmember traversing the hit-way and provided with a surface coacting with one of the toothed surfaces of the the bit, so as to ing the other surface of the bit and the coacting surface of the mounting into operative engagement.

With these and other objects in view, the invention consists of certain novel features of construction, combination and arrangement of parts, as will be hereinafter described and claimed.

In the accompanying drawings :Figure 1 is a side view of a chain link, showing the bit in its applied position thereto; Fig. 2 is a vertical section therethrough, showing the bit in' elevation; Fig. 3 is a top plan View of the link andbitf Fig. 4 is a perspective view of the bit; and Fig. 5 is a perspective view of the impinging or clamping member.

The link 1 isprovided at one side w1th bit and operating to effect adjustments of van integral lug 2, in which is formed a bitway 3 disposed diagonally to the longitudinal plane of the link and provided with a wall having transversely arranged teeth or corrugations 4. The blt-way opens onto the opposite sides of the link, and as illustrated said bit-way is adapted to adjustably receive a correspondingly formed bit 5 having identically constructed points 6 which extend ,beyond the opposite ends of the bit-way when so that one of the points will be operatively projected to perform its function.

A guide slot 7 is formed in the lug or mounting 2 and is arranged to traverse the bit-way 3 and to slidably accommodate an impinging member 8. The impinging member is preferably of rectangular configuration, conforming transversely with the slot 7, so that the member will be positively held against turning. The impinging member is provided with a longitudinally extending slot 9 having a length exceeding the width of the bit 5, so that the latter may be freely advanced through the slot in the operation of initially fixing the hit upon the link. The

end wall 10 of the slot 9 lies parallel with the toothed wall 4 of the bit-way 3, so as to form a guiding surface to properly deflect one of the points 6 into the branch 3 of the bit-way when the impinging member. is adjusted to a released position. This construction is desirable in that the bit may be advanced into the bit-way with facility and freedom. A wall 11 of the impinging memher 8 lies parallel mounting or lug 2, and is provided with transversely extending teeth which are adapted for interfitt-ing engagement with either set of teeth or corrugations 12 on two edges of the bit. The toothed wall 11 of the impinging member is disposed to one side of the plane of the toothed wall 4: of the mounting 2 whereby when the impinging member is adjusted to an operative clamped position the surface 11 Will be drawn into mutual contact with one of the surfaces 12 and then tend to tilt the bit and cause the surface 4 to be brought into interlocking engagement with the other set of teeth 12 on the bit. The impinging member is provided with a reduced cylindrical shank 13, which is threaded for the reception of a clamping u nut 14. The shank extends through a passage 15 in one endof the mounting 2, and

as illustrated in Fig. 2 the nut may be adeffective cutting the key is applied '65 with the wall 4 of the 90 justed to bear against one end of the mounting and thereby retain operative adjustments of the impinging member and bit respectively.

From the construction described, it is evident that the cutting bit may be reversed at the discretion of the operator, so that when one of the cutting points 6 is worn or destroyed another point may be quickly substituted therefor. The fact that the impinging member 8 is provided with a toothed surface 11 mutually cooperating with similar surfaces of the bit, insures operative retention of the bit and affords means for effecting such retention Without resulting in injuring the toothed surfaces of the bit during the clamping operation.

Having thus described my invention, what I claim is I p The combination of a chain link having a lug formed with a key-way of rectangular cross section passing through the body of the lug, and in th lengthwise direction thereof," and an intersecting and longitudiof the first named key-way being prov1 nally disposed slot of rectangular cross section; said keyway provided on a portion of one wall thereof with a plurality of corrugations; a'block of rectangular design slidably mounted in said longitudinal slot of rectangular cross section, and provided with a key-way adapted to register with the keyway in the lug; the wall of the key-way of the slidable block opposite the corrugatigns ed with corrugations; a bit fitting Within said registering key-ways and projecting at either end beyond the lug and link, said bit having a pair of opposite Walls thereof formed with corrugations adapted to engage with the corrugations of said key-Ways; and a device for clamping said slidable block to secure the bit in position.

In testimony whereof I afiix my signature in presenceof two witnesses.

CHARLES N. BARTON. Witnesses H. H. BYRNE, R. S. PERSON.

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