Abstract: A method and machine for hammering circular saw blades automatically, to correct uneven distributions of residual stresses, and distortions of the blade surfaces from true planes, so that the blades will run true. This operation has previously only been performed manually, by highly-skilled craftsmen. The saw blade is elastically deflected so that its normally-planar surface lies in a curved surface of a predetermined contour. A proximity sensor passes over the blade to detect deviations of its surface from the predetermined contour, which occur at points of uneven stress distribution or surface distortion. At such points, the blade is arrested and hammered until the fault is corrected.

Abstract: A support member positioned between a receiver assembly and the rear end of a removable barrel assembly having "C" sections on each side of the support member to support the rear end of the fore-end and also to permit sliding movement of an action bar assembly therein. At the rear of the support member is a spring section which is positioned between the receiver assembly and the barrel assembly to compensate for variations of tolerances between the barrel assembly and the receiver assembly.

Abstract: A flexible base metal strip has a strong, tough and adherent abrasive armoring coating produced thereon in situ from abrasive particles of hard, high melting material selected from the group consisting of metal carbides, borides, nitrides, silicides and combinations thereof, and particles of a matrix metal, said matrix metal particles being in said armoring coating and fusion bonded to each other, to the base metal strip and to the abrasive particles to anchor and partially embed the abrasive particles therein with the particles projecting therefrom in the form of a series of sharp cutting edges. When such a strip is provided at one end with a suitable handle, it forms a convenient hand file and its flexibility permits use in a variety of situations. Attachment means may be provided at each end of the coated strip as shown in a co-pending application for attachment of the strip to a suitable frame such as a standard hack saw frame.

Abstract: A plurality of tubular projectiles are held in a container. A stem is withdrawn from one end of the container until it engages a plunger. After the other end of the container is placed in a launcher, the stem is pushed into the container forcing the plunger to move the projectiles toward the launcher, the projectile closest to the launcher being transferred from the container and properly positioned in the launcher for firing.