Abstract: An oscillating disc cutter including a cutting disc and a drive mechanism. The drive mechanism includes a drive shaft to effect eccentric oscillation of the cutting disc and a radial bearing disposed to permit relative rotation between the drive shaft and the cutting disc. The cutter further including a hydrostatic axial bearing disposed to react axial forces while accommodating induced rotation of the cutting disc when operatively engaged and to induce a rotational drag thereby limiting rotational peed of the cutting disc when free running. A water pressurized fluid bearing induces a predetermined axial load in the hydrostatic bearing such that a predetermined maximum running clearance in the hydrostatic bearing is maintained.

Abstract: A rock cutting machine including a boom rotatably mounted at a proximal end to a chassis adapted to be placed adjacent a rock face to be cut. The boom extends from the chassis to a distal end adjacent the rock face. A longitudinal boom axis extends between the proximal and the distal ends of the boom and a cutting device is pivotally mounted about a pivot axis adjacent the distal end of the boom. The pivot axis enables wrist movement about the pivot axis by a drive mechanism and is offset from the longitudinal axis of the cutting device.

Abstract: An assembly (10) for a stringed musical instrument, the assembly (10) including an elongate neck (11) to which one end of a string arrangement (41) of the instrument can be anchored and a structural member (17) depending from the neck (11). The structural member (17) being substantially aligned with the lengthwise extent of the neck (11) and extending in the opposite direction thereto so as to overlie a sound box to which in use, the assembly (10) is connected. The structural member (17) is arranged to cooperate with and to bear string tension load of the string arrangement (14) applied to the assembly (10). A bridge (30) for a stringed musical instrument, which bridge (30) includes first and second parts (31, 32) which are pivotable relative to one another.

Abstract: A rock excavating or cutting device including a disc cutter that is driven by drive means to rotate in an oscillating and nutating manner by driving the disc cutter about separate oscillating and nutating axes aa, bb which are angularly offset from one another and which intersect at a point ahead of the disc cutter.

Abstract: A rock excavating or cutting device including a disc cutter that is driven by drive means to rotate in an oscillating and nutating manner by driving the disc cutter about separate oscillating and nutating axes aa, bb which are angularly offset from one another and which intersect at a point ahead of the disc cutter.