Sawing chain for mechanically-actuated chain saws for grinding through hard stone, rock and like hard material

摘要

817,774. Saw chains. STIHL, A. Sept. 10, 1957 [Sept. 11, 1956; Dec. 7, 1956], No. 28472/57. Addition to 815,631. Class 124. The body of each link of a saw chain according to the parent Specification is of rectangular cross-section and has an abrasive element attached in a groove in its outer edge. As shown, a link 1 has an element 6 of hard metal secured in a groove 9 by welding cementing, or brazing, the edges 8 of the element overlapping the sides of the link. The chain may comprise a link 1 coinciding with the longitudinal centre line alternating with double links and joined by rivets passing through holes 3 having interchangeable bushes 2. The elements on the double links 11SP1/SP may extend laterally beyond the link and those on the centre links 1, 1SP1/SP, 1SP11/SP may extend alternately to either side, the path of the centre link elements overlapping that of the double link elements. In a modification, Fig. 17 (not shown) the double link elements may extend on either side of the link with a space of 0À2 mm. between the elements to prevent lateral displacement. The elements may be wider at the leading edge than at the trailing edge and may taper from the free end to the link end.