专利名称：Key sensor alarm for door locks发明人：Raul Guim,Elena Guim申请号：US08/310577申请日：19940922公开号：US05461360A公开日：19951024
摘要：A key reminder device for use in combination with a key lock mechanism havingan adjustable timer with a predetermined timer interval electrically coupled to a replacedpower supply. The timer is energized upon detection of a conventional key inserted intothe key lock mechanism. Should the key remain in the key lock mechanism beyond apredetermined time, the timer will activate an audible alarm to remind the owner of thekeys to remove them. Should the timer be set at a low level, the device operates toindicate the presence of a key. When used in combination with a visual indicator, the keyreminder provides an indicator of door entry to the hearing impaired.
申请人：GUIM; RAUL,GUIM; ELENA
代理机构：McHale & Slavin
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