Patent ID: 6298603
Filing Date: 2001-10-09
Classification: E05G,E05Y,G01V

Abstract:
An access control vestibule, comprising:a metal frame including a side wall frame section;the side wall frame section comprising a cutout section;the side wall frame section comprising a first portion and a second portion;an entrance door and an exit door mounted on opposite ends of the access control chamber to permit access into and exiting from the access control chamber;lock means for locking both of the doors;the metal frame defining an access control chamber;a metal detector disposed to detect metal within the access control chamber;a bullet resistant transparent glass mounted in the side wall frame section;control means for preventing both doors from being opened at the same time;said control means being operatively connected to said lock means to control locking and unlocking of both doors;seismic detector means for determining if an earthquake or an explosion is occurring;the seismic detector means being operatively connected to the control means; andwhereby upon the seismic detector means determining that an earthquake or an explosion is occurring, the control means unlocks both doors.