1,064,533. Digger tooth-mounting means for endless chain trenchers. G. A. PETERSEN. July 8, 1965, No. 28963/65. Heading E1F. To facilitate distribution of forces encountered by digger teeth of an endless chain trenching machine through the chain to the boom of the trencher each tooth support, which is designed for connection in or to the chain comprises apertured parallel legs abridged (by a tooth-supporting table having a rearwardly extending arm formed with a curved surface that bears against a roller on the rear connecting pin of the following link to which the support or the link to which it secured is pivotally joined.