Electronic reset for solenoid activated control in an...

E - Fixed Constructions – 05 – B

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E05B 47/00 (2006.01) G07C 9/00 (2006.01) E05B 47/06 (2006.01)

Patent

CA 2236278

The technique for electronically resetting a magnetically sealed solenoid to an unattracted, unactuated position is described for use with solenoids which have either a residual magnetic or a permanent magnet holding force necessary to retain the armature of the solenoid in its actuated position until such time as the armature is either physically displaced by a mechanical force or an electronic signal is applied to the solenoid. This displacement creates a reverse polarity magnetic field, effectively overcoming the magnetic field acting to hold the armature in its actuated position, permitting a small mechanical force to reset the armature. In order to prevent a lock or similar device from being conditioned for opening and possibly left in that condition for a significant period of time while unattended jeopardizing the security of the container and its contents, the actuation of the armature in the reset or release phase may occur a relatively short time following its actuation.

Cette invention concerne une technique de réarmement électronique d'un solénoïde à blocage magnétique du type nécessitant la force de maintien en position opérante soit d'un aimant à aimantation résiduelle soit d'un aimant permanent jusqu'à ce que l'armature soit ramenée à sa position de départ soit par une force mécanique soit sous l'impulsion d'une signal électronique. Ce déplacement engendre un champ magnétique à polarité inversée qui annule effectivement le champ magnétique de maintien de l'armature en position opérante de sorte qu'il suffit d'une petite force mécanique pour réarmer celle-ci. Afin de prévenir le maintien prolongé du mécanisme intérieur d'une serrure ou d'un dispositif analogue en position permettant l'ouverture de la serrure par une personne non autorisée, ce qui met en danger le contenant et son contenu, le réarmement de l'armature par déblocage ou libération peut survenir après un temps d'ouverture relativement court.

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