Abstract: A guide arrangement for a drum-type cutting machine is composed of a guide block cooperating with a guide rail and articulated at the lower end of a vertical guide arm of the cutting machine. The guide block has a pocket defined by lateral walls which receives the guide arm. A transverse bolt extends through the pocket in the guide block and is received snugly by a bore in the guide arm. One of the end regions of the bolt forms a pivot journal head with curved surfaces which is received in a pivot journal socket in one of the lateral walls of the pocket in the guide block. The other end of the transverse bolt fits with lateral play in a horizontal guide of the other lateral wall of the guide block. The inner surfaces of the lateral walls incline relative to a horizontal plane to permit the guide arm to cant about a vertical axis.

Abstract: In the driving and guide arrangement according to the invention, the drive chain in a chain channel bounded by a guide rail and a rear wall is supported only on series of spaced, narrow support elements at least some of which may form connecting plates welded between the rear wall and the guide rail. As the narrow support elements are spaced apart from one another, fines getting into the chain channel from above readily drop between them, and emerge freely through face side and gob-side discharge openings in the chain channel. Caking of fines in the chain channel is largely prevented in the arrangements, which are fabricated as welded constructions and are therefore particularly economical to produce.

Abstract: The scraper chain belt according to the invention is preferably intended for scraper chain conveyors of long conveying lengths and correspondingly high drive outputs, and consists of vertical and horizontal chain links (1, 2) which are suspended articulated within one another, wherein the vertical chain links (1) advantageously have a surrounding out-of-round cross-section which is provided with a flat (6) on its external contour, whilst the horizontal chain links (2), which serve for the scraper connection, are formed in the manner of webbed chain links having a central web (12) which passes transversely through their internal opening. The scraper connection is preferably effected with the aid of studs (19) which are fixedly disposed on the scrapers (13) and which point towards the scraper base, and which pass through the insertion openings (20) in the central webs (12) of the horizontal chain links (2), wherein the scraper connection can be secured with the aid of locking elements.

Abstract: The link chain according to the invention is preferably intended for scraper-chain conveyors of long conveyor lengths and correspondingly high drive powers, and comprises vertical and horizontal chain links that are hooked into one another in an articulated manner. The vertical chain links have a non-round, approximately semicircular cross-section provided on the external contour with a flattening, and the horizontal chain links have an oval internal opening whose clear internal width, has a shape corresponding to the cross-sectional contour of the vertical chain links, and is greater than the clear internal width of the vertical chain links. It is preferable that the pitch and the length of the horizontal chain links is greater than the pitch and length of the vertical chain links. The external boundary of the nose parts of the horizontal chain links preferably extend at right angles to the chain axis, with the result that a broad chainwheel bearing surface is formed.

Abstract: The invention relates to a scraper-chain assembly for scraper-chain conveyors, in particular central or double central scraper-chain conveyors, having a scraper connection to horizontal chain links of the single-strand or two-strand chain assembly. Vertical chain links hooked into the horizontal chain links are provided with longitudinal limbs which have a non-round cross-section, and whose thickness dimension is smaller than that of nose parts of these chain links that connect the longitudinal limbs. For the scraper connection, the scrapers have coupling and locking pins, which extend through internal openings of the horizontal chain links, between the hooked-in vertical chain links and which protrude from the internal openings to form locking pieces which serve to secure the scrapers.