专利名称：ENERGY EFFICIENT AND POWER VERSATILE
ELECTRO-PERMANENT MAGNET SYSTEMFOR USE IN A DOOR HOLDER UNIT
发明人：Glen A. Robertson申请号：US15844588申请日：20171217
公开号：US20190186181A1公开日：20190620
专利附图：
摘要：An energy efficient and power versatile electro-permanent magnet system foruse in a door holder unit is an electro-permanent magnet having a permanent magnet for
holding a door open while unpowered and a control coils that can be pulsed powered,locally or remotely, by a pulsed capacitor control circuit for power versatility and forreleasing of the door with little energy.
申请人：Glen A. Robertson
地址：Madison AL US
国籍：US
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