Abstract: The present invention relates to a protection circuit for MOS-technology field-effect transistors. The circuit comprises at least one MOSFET protected by a module for blocking said MOSFET, the module being placed between the gate of the MOSFET and an electrical conductor, the module comprising switched connection means having at least two states: a first state which connects the gate of the MOSFET to the conductor, which is maintained at an electrical potential suitable for blocking the MOSFET, this first state being activated in the presence of an alarm signal; and a second state which disconnects the gate of the MOSFET, this second state being activated in the absence of the alarm signal. The invention applies notably to the protection of the power MOSFETs included in the amplification stages of electronic systems.

Abstract: The present invention relates to a protection circuit for MOS-technology field-effect transistors. The circuit comprises at least one MOSFET protected by a module for blocking said MOSFET, the module being placed between the gate of the MOSFET and an electrical conductor, the module comprising switched connection means having at least two states: a first state which connects the gate of the MOSFET to the conductor, which is maintained at an electrical potential suitable for blocking the MOSFET, this first state being activated in the presence of an alarm signal; and a second state which disconnects the gate of the MOSFET, this second state being activated in the absence of the alarm signal. The invention applies notably to the protection of the power MOSFETs included in the amplification stages of electronic systems.

Abstract: The device is a clamp (1), designed to hold a construction piece, including a clamping lever (2), which climbs by pivoting around a transverse axis (3), in a case (4) formed by two half-shells (4a, 4b) with mirror symmetry along their joining plane and containing the clamping mechanism of the device (1), which is operated, by an intermediary shaft of a fluid cylinder (6) and (7) and of a system of a connecting rod (8) and a crank (9), or directly, between two positions, the first activates the release of the piece and the second activates the clamping of the piece, characterized in that each of the two half-shells (4a, 4b) forming the case (4) are made of a material that includes at least one reinforcement insert (10) made of a distinctively more rigid material and inserted into each half-shell (4a, 4b) in a zone subjected to high stress during clamping, so as to confer a resistance to stress in that zone, augmented in torsion, traction, or compression.

Abstract: The device is a clamp (1), designed to hold a construction piece, including a clamping lever (2), which climbs by pivoting around a transverse axis (3), in a case (4) formed by two half-shells (4a, 4b) with mirror symmetry along their joining plane and containing the clamping mechanism of the device (1), which is operated, by an intermediary shaft of a fluid cylinder (6) and (7) and of a system of a connecting rod (8) and a crank (9), or directly, between two positions, the first activates the release of the piece and the second activates the clamping of the piece, characterized in that each of the two half-shells (4a, 4b) forming the case (4) are made of a material that includes at least one reinforcement insert (10) made of a distinctively more rigid material and inserted into each half-shell (4a, 4b) in a zone subjected to high stress during clamping, so as to confer a resistance to stress in that zone, augmented in torsion, traction, or compression.

Abstract: An embossing head (2) is mounted on an embossing device (1) for movement between an inactive position and a position in which it is pressed against a sheet of metal supported on an anvil (5) to emboss an identification or serial number. The embossing head includes a series of serrated rollers (6a, 6b, 6c, 6d, 6e, 6f) which are rotatably mounted on a transverse axle (7). The rollers are stacked immediately adjacent each other without intervening space. A one piece operating pawl (13) includes a series of staged teeth (29a, 29b, 29c, 29d, 29e, 29f) descending in height from a first to a last of the teeth. The pawl further includes a side projection (30) which lifts the teeth over numbers on the rollers to limit wear.