Secure entry system with radio communication.
作者： John M. Kniffin , Ron Mccauley , John W. Sherman , Wayne F. Larson , Ralph H. Wells
DOI:
关键词:
摘要: A secure entry system (10, 44, 50, 60) makes use of radio transmissions to communicate with locks (12, 12'), keys (46), and related components throughout the system. The can be made using a paging system, cellular telephone (52, 54), or any other RF carrier (26). Some embodiments (50) employ (52) in lieu an electronic key (46). Others integrate receiver (14) within provide unit dual functionality. is illustrated reference exemplary applications industrial site security, real estate lockbox, transportation fields (60).
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