Abstract: An apparatus (1) for applying magnetic field treatment to a biological entity is disclosed. The apparatus has a signal generation unit (6) for generating an electrical treatment signal, and an induction coil mat (5), connected to said signal generation unit (6). A magnetic field is generated by the induction coil mat (5) in accordance with said electrical treatment signal. The electrical treatment signal comprises frequency components of approximately 300 Hz, 600 Hz, 800 Hz and 1,000 Hz in superposition. A further set of frequencies in the range between 2 Hz and 32 Hz can be added. These further frequencies are chosen in accordance with a desired treatment mode of operation.

Abstract: A machine chuck (10) having a base (13) to be rotated about a longitudinal axis. Jaw members (20) move relative to the base (13) and radially with respect to the axis. A scroll member (18) is mounted on the base for angular movement relative thereto, which scroll member (18) engages the jaws (20) to cause the radial movement thereof. The base (13) has an annular passage which receives pistons (17) attached to the scroll member 18. Fluid under pressure delivered to the passage (16) causes angular movement of the pistons (17) and therefore scroll member (18) relative to the base (13). This angular movement causes radial movement of the jaw members (20).