Abstract: An accelerometer has a cantilever beam supported at one end and having an opposite free end with a longitudinal direction between the supported end and the free end, the beam being formed of a piezoelectric layer and a supporting layer. An inertial, sensing mass is mounted at the free end of the beam, and is located eccentrically relative to the longitudinal direction of the beam. The accelerometer has a primary direction of sensitivity to acceleration forces, and a secondary direction of sensitivity, which is orthogonal to the primary direction and in which the sensitivity is negligible. The secondary direction forms an angle relative to the longitudinal direction of the beam such that a line coinciding with a force proceeding through the center of gravity of the inertial mass, and which is directed in the secondary direction, also intersects the beam.

Abstract: An accelerometer has a cantilevered beam supported at one end and having an opposite free end, with an inertial, sensing mass mounted at the free end of the beam. The beam is formed of a piezoelectric layer and a supporting layer. The ratio of the thickness of the piezoelectric layer relative to the thickness of the supporting layer is in a range between 2 and 4. The ratio of the modulus of elasticity of the material forming the supporting layer relative to the modulus of elasticity of the material forming the piezoelectric layer is in a range between 8 and 12.

Abstract: The present invention is related to an electrode for destruction of biological tissue, suitably tumor tissue such as cancer. Prior art electrodes suffers from several disadvantages, such as e.g. a non-uniform current distribution, resulting in a oval and unpredictable destruction zone in the tissue. The present invention provides an electrode for destruction of biological tissue, comprising an electrical conductor (2) with a first thickness (t.sub.1), provided with electrical insulation (3) having a second thickness (t.sub.2), the conductor being connected to a current source at one end and electrically connected to an electrode head (4) at the other end of the conductor, where the electrode head serves for supplying current to the zone of the biological tissue, wherein the electrode head (4) is substantially spherical (5,10) with a diameter (D), where said diameter of the sphere is equal to or larger than said first thickness (t.sub.1).