Abstract: A breaking detector for a shear pin having a central bore, comprises an electrically conductive element forming an elongated loop extending on a length of the bore of the shear pin and having upper ends defining contact surfaces adjacent to each other. An electrically insulating element extends in the loop, to prevent the conductive element from short-circuiting. Power supply cables are connected respectively to the contact surfaces and are provided with connectors facilitating connection of the breaking detector to other breaking detectors or to an alarm panel. An electrically insulating body removably supports the elements of the detector in the bore of the shear pin. An identification circuit having a light indicator connected between the contact surfaces and projecting at an upper end of the body allows to locate a defective shear pin having broken the conductive element.

Abstract: A breaking detector for a shear pin having a central bore, comprises an electrically conductive element forming an elongated loop extending on a length of the bore of the shear pin and having upper ends defining contact surfaces adjacent to each other. An electrically insulating element extends in the loop, to prevent the conductive element from short-circuiting. Power supply cables are connected respectively to the contact surfaces and are provided with connectors facilitating connection of the breaking detector to other breaking detectors or to an alarm panel. An electrically insulating body removably supports the elements of the detector in the bore of the shear pin. An identification circuit having a light indicator connected between the contact surfaces and projecting at an upper end of the body allows to locate a defective shear pin having broken the conductive element.

Abstract: The voltage variation between the electrodes of the tube of a microwave amplifier (1) causing a phase Shift of the output wave from the microwave amplifier (1), the process according to the invention consists of creating a phase shift of the wave entering the tube of the microwave amplifier (1) that is substantially proportional to the voltage variation and in the direction opposite the phase shift of the output wave caused by this voltage variation.