Abstract: A method for carrying out deep holes and/or bottle-boring, in particular borings, with a high ratio between final linear depth and hole diameter, higher than 14:1, comprises the steps of: carrying out a reference hole, having axis and diameter linked to the deep hole to be carried out by a predetermined spatial relationship; making a deep hole of a diameter smaller than the hole to be carried out, so that said reference hole and said first deep hole be in spatial communication; and prearranging a guiding and supporting element internal to said reference hole and connecting thereto a tool shaft and a related tool to obtain a contour internal to the deep hole and/or a deep hole of diameter and axis according to said predetermined spatial relationship.

Abstract: A safety method and safety apparatus of an electric installation (2) that is powered through an electric supply line (3), and has a ground wire (9). The safety apparatus comprises a means (400A) for automatically measuring (71) the voltage (?V) that is established between the neutral point (1,23) of the transformer (26) of an electric supplying network and the ground wire (9). A comparison (74) is then made between the measured voltage (?V) and an alarm voltage value (?V). Finally, a switch (33) is activated (79) by means of a control device (370), when the measured voltage (?V) exceeds an alarm voltage value (?V), and the electric supply line (3) is automatically disconnected from the electric installation (2). The invention is adapted to prevent, in particular, dangerous contact voltages from building up on the a ground terminal that is shared by all the electric installations of a living unit of multifloor building that would be transferred to all the electric installations that are connected to ground.

Abstract: The apparatus allows measuring the presence of damages to the induced circuit (15) of a residual current circuit breaker (200), or of a blocked electromechanical releasing device (11) of residual current circuit breaker (200), and to operate in one qf said two cases a releasing device (20) additional to that (11) of residual current circuit breaker (200). This can be obtained, on the one hand, determining if there is or less a current flow in the induced circuit (15) of the residual current circuit breaker beyond a minimum threshold, or if there is on the other hand a current flow beyond a maximum threshold. The absence of this minimum current in the induced circuit (15) causes the opening of additional releasing device (20). In the latter case, it is possible to obtain this feature by establishing when induced circuit (15) of residual current circuit breaker (200) is flown by a current beyond the maximum threshold.

Abstract: A method for carrying out deep holes and/or bottle-boring, in particular borings, with a high ratio between final linear depth and hole diameter, higher than 14:1, comprises the steps of: carrying out a reference hole, having axis and diameter linked to the deep hole to be carried out by a predetermined spatial relationship; making a deep hole of a diameter smaller than the hole to be carried out, so that said reference hole and said first deep hole be in spatial communication; and prearranging a guiding and supporting element internal to said reference hole and connecting thereto a tool shaft and a related tool to obtain a contour internal to the deep hole and/or a deep hole of diameter and axis according to said predetermined spatial relationship.

Abstract: A mechanism for providing a cycloidal output motion for an output member in a linear direction using a constant velocity rotary input motion driving an off-center input shaft and drive gear and utilizing a secondary motion to influence the position of the drive gear in relation to the output member and the acceleration and deceleration of the output member. A compact embodiment utilizes a ring gear and planetary and a reaction motion to provide the secondary input.

Abstract: Felts and non-woven fabrics comprising glass fibers and unstretched polyester fibers having a titer higher than 3 dtex, a break elongation higher than 100%, a modulus lower than 200 g/tex, a crystallinity lower than 20%, and a toughness lower than 20 g/tex.