Abstract: Disclosed is a tape-laying mechanism and method for constructing sheet layments of composite resin-embedded filamentous material in incremental tape form. A pair of tape-laying heads are mounted side by side for simultaneous operation with their tapes spaced apart an integer multiple of the tape-width. Controlled movement of a tape-laying subcarriage of each mechanism draws tape from a supply before implanting it progressively on the laying surface by return movement of the subcarriage. Tape is laid without movement of the mechanism as a whole other than for lateral indexing, and the mechanism allows lateral indexing while the tape is being drawn out to length above the laying surface before it is implanted.

Abstract: A machine tool head having a spindle nutatable about a center at the front of the spindle and at or closely adjacent to the front face of the machine tool head so that the radial reaction to the cutting forces is transmissible from the spindle to the machine-tool head essentially in the plane of the front face of the machine tool head.

Abstract: An on-edge indexable cutting insert in which each end of the insert is formed with a convexly curved surface which gradually decreases in area per unit of length as the curved surface proceeds away from the cutting edges so as to form each cutting edge with a convexly curved tip of relatively large radius while leaving a flat and planar locating surface of substantial area on each end of the insert.

Abstract: A machine tool head in which a rotary spindle is adapted to nutate by virtue of the spindle being mounted in a housing supported to rotate about a predetermined axis and by virtue of the housing being mounted in another housing adapted to rotate about an axis which is inclined relative to the first axis. A train of bevel gears connects the spindle to a non-nutating drive motor and maintains a rotary drive from the motor to the spindle in all positions of the spindle.

Abstract: A cutting insert is disposed in a pocket formed in a cutter body and having a side wall and an angularly related bottom wall. A first wedge engages one face of the insert and includes a pin which extends into a hole in the insert. A second wedge engages the first wedge and, when the second wedge is shifted inwardly, the first wedge clamps a face of the insert against the side wall of the pocket while the pin clamps the inner edge portion of the insert against the bottom wall of the pocket.

Abstract: A cutting tooth is carried on the outer end portion of a shaft which is eccentrically mounted within a power-rotated boring bar and which may be selectively turned within the bar to enable the tooth to be adjusted between an inactive retracted position and an active cutting position. By sliding the shaft in one direction, serrated rings mounted on the outer end portion of the shaft and within the outer end portion of the bar may be uncoupled to permit turning of the shaft. When the shaft is slid in the opposite direction, the rings are recoupled to establish a torsionally stiff rotational drive to the tooth by way of the outer end portions of the bar and the shaft. Turning of the shaft to adjust the tooth to its cutting position also effects outward adjustment of support pads for maintaining the outer end portion of the bar in a stable radial position during the boring operation.

Abstract: Upper and lower milling cutters scalp the top and bottom surfaces of an ingot as the ingot is advanced between the cutters by a carriage. The carriage comprises a pair of laterally spaced and longitudinally movable slides which support sharp-pointed plungers adapted to dig into the sides of the ingot to clamp and support the ingot for movement with the slides. The carriage formed by the slides and the plungers is of open-ended construction and is adapted to move into and out of straddling relationship with the ingot in order to reduce the dwell time of the carriage when picking up and releasing the ingot.

Abstract: A mounting for supporting a cutter tooth in a boring bar for fine adjustment outwardly to compensate for tooth wear, the mounting including a cartridge insertable into a hole through the boring bar to support the tip of the cutter tooth in a cutting position with respect to the bar. The cartridge comprises a slidable holder connected by means of a differential screw to a nut so that, as the screw is turned, the length of the cartridge is increased to provide fine adjustment in the position of the cutter tooth. Coarse adjustment in the position of the cutter tooth is provided as an incident to assembling the parts of the cartridge by threading the screw into the nut until the lower end of the screw is flush with the lower end of the nut and by then mounting the holder on the upper end of the screw.