Abstract: A magnetic latching solenoid having a coil assembly, a ferromagnetic core slideably fitted to linearly translate upon excitation of the coil assembly by a pulse of electric current, a stationary electromagnetic pole positioned in line with the ferromagnetic core, at least one flux conductor and a frame, all forming a magnetic flux circuit. A contact area between a face of the ferromagnetic core and a face of the stationary electromagnetic pole is reduced by respective recesses in the ferromagnetic core and the electromagnetic pole, each recess having opposing inclined walls extending from the respective face to a common apex defining a depth of the recess, and forming a residual planar surface of concentrated flux density surrounding the recesses.

Abstract: A magnetic latching solenoid having a coil assembly, a ferromagnetic core slideably fitted to linearly translate upon excitation of the coil assembly by a pulse of electric current, a stationary electromagnetic pole positioned in line with the ferro-magnetic core, at least one flux conductor and a frame, all forming a magnetic flux circuit. A contact area between a face of the ferromagnetic core and a face of the stationary electromagnetic pole is reduced by respective recesses in the ferromagnetic core and the electromagnetic pole, each recess having opposing inclined walls extending from the respective face to a common apex defining a depth of the recess, and forming a residual planar surface of concentrated flux density surrounding the recesses.

Abstract: The invention provides an electronic warning system, including an electrical line of a fence extending along a protected area; a pulser; a transmitter for transmitting pulses through the line; a receiver for receiving the pulses after being transmitted along at least a portion of the line; an impedance having a resistance substantially identical to the line characteristic resistance and connected at the end of the line, for absorbing the pulses when the pulses are received thereby at the end of the line so that the pulses do not return to the receiver; a plurality of sensors disposed at spaced-apart locations along the line and actuated responsive to phenomenon occurring in the vicinity thereof, for, when actuated, causing the pulses to return to the receiver; and a processor for operating the transmitter and receiver and for actuating a warning signal upon the detection, by at least one of the sensors, of the phenomenon.

Abstract: The invention provides an electronic warning system, including an electrical line of a fence extending along a protected area; a pulser; a transmitter for transmitting pulses through the line; a receiver for receiving the pulses after being transmitted along at least a portion of the line; an impedance having a resistance substantially identical to the line characteristic resistance and connected at the end of the line, for absorbing the pulses when the pulses are received thereby at the end of the line so that the pulses do not return to the receiver; a plurality of sensors disposed at spaced-apart locations along the line and actuated responsive to phenomenon occurring in the vicinity thereof, for, when actuated, causing the pulses to return to the receiver; and a processor for operating the transmitter and receiver and for actuating a warning signal upon the detection, by at least one of the sensors, of the phenomenon.

Abstract: The invention provides an impact armature for a solenoid device, adapted to move and perform a working stroke when the solenoid device is activated, the armature including a ferromagnetic armature provided with shoulder means; an effector member made of a non-ferromagnetic material and provided with counter-shoulder means whereby the effector member is engageable by the shoulder means of the armature; characterized in that, in operation, the armature performs a two-phase working stroke, wherein, in a first phase, the armature moves relative to the effector member for a relatively short, predetermined distance while the effector member remains stationary, and, in a second phase, the armature completes its working stroke, the shoulder means engaging the counter-shoulder means, thereby carrying along the effector member.

Abstract: The invention provides an impact armature for a solenoid device, adapted to move and perform a working stroke when the solenoid device is activated, the armature including a ferromagnetic armature provided with shoulder means; an effector member made of a non-ferromagnetic material and provided with counter-shoulder means whereby the effector member is engageable by the shoulder means of the armature; characterized in that, in operation, the armature performs a two-phase working stroke, wherein, in a first phase, the armature moves relative to the effector member for a relatively short, predetermined distance while the effector member remains stationary, and, in a second phase, the armature completes its working stroke, the shoulder means engaging the counter-shoulder means, thereby carrying along the effector member.

Abstract: A brake release lock interposable between the master cylinder of a hydraulic vehicle braking system and the wheel cylinders, including a first connecting element for connection to the master cylinder, a second connecting element for connection to the wheel cylinders, a first passageway connecting the first and second member, having a valve seat and bore for a check valve spring-biased against the seat and configured in such a way as to permit fluid to flow from the master cylinder to the wheel cylinders, but to prevent fluid from returning from the wheel cylinders to the master cylinder, a second passageway connecting the first and second connecting elements, bypassing the first passageway, and a solenoid valve responsive to signals producible by an authorized user of the vehicle, for cutting off the second passageway after the vehicle has been parked, and for re-establishing the second passageway prior to driving off the vehicle.

Abstract: An electronic, code-operable lock attachment, having a shank adapted to fit, and be fixedly attached to, a standard mortise lock, and having a flange-like rim portion, a housing fixedly attachable to the rim portion of the shank, an actuating shaft passing in an axial direction through the housing and the shank, a bolt-operating arm fixedly mounted on one end of the shaft and adapted, in the mounted state of the electronic lock attachment, to engage the bolt of the mortise lock. The lock attachment also includes a handle fixedly attached to the second end of the shaft.

Abstract: An electro-mechanical locking device, including a dead bolt having a slot at one end portion and having at its other end portion a tip configured to enter a preformed shaped aperture while assuming at least one orientation and to be blocked by rim portions of said aperture while assuming at least one other orientation and an electrically operable means for applying a rotary movement to a guide member for the dead bolt. The guide member is coupled to the bolt by means of the slot. The device further includes a key operated unlocking and locking actuator means connected to said bolt for effecting linear retraction and extension movements of the bolt when acted upon by the key, while allowing rotary movement of the bolt by said guide member when the guide member is acted upon by the electrically operable means.