Patent ID: 8231151
Filing Date: 2012-07-31
Classification: E05B,E05C,G08B,Y10T

Abstract:
1. A system for securing and releasing doors, the system comprising: a first electromagnetic latch for securing and releasing a first door, the first electromagnetic latch including a first coil configured to be energized by a power signal to create a first magnetic field; to maintain the first electromagnetic latch in either a locked or unlocked state; a second electromagnetic latch for securing and releasing a second door, the second electromagnetic latch including a second coil configured to be energized by the power signal to create a second magnetic field to maintain the second electromagnetic latch in either a locked or an unlocked state; and a controller operable to apply the power signal sequentially to the first electromagnetic latch and the second electromagnetic latch such that the power signal energizes only the first coil during a first time period and energizes only the second coil during a second time period while each of the first and second electromagnetic latches continue to maintain either the locked or unlocked state.