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1. 发明授权

US3766452A Instrumented token 失效
标题翻译：仪器仪表
公开(公告)号：US3766452A
公开(公告)日：1973-10-16
申请号：US3766452D
申请日：1972-07-13
申请人： BURPEE L , BURPEE C , PAYNTER D
发明人： BURPEE L , BURPEE C , PAYNTER D
IPC分类号： G06K19/067 , G07D7/00 , G07F1/06 , G07F7/08 , G08B13/24 , G09F3/00
CPC分类号： G08B13/242 , G06K19/067 , G06K19/0672 , G07D7/00 , G07F1/06 , G07F7/086 , G08B13/2445 , G09F3/00 , Y10S283/901 , Y10S283/904
摘要： Disclosed is an instrumented token or chip representative of value. Concealed within or on the surface of the token is a passive resonant circuit which responds to incident electromagnetic radiation in a preselected frequency to produce and radiate a unique detectable signal indicative of the token''s presence in the incident field.
摘要翻译：公开了代表价值的仪表化令牌或芯片。隐藏在标记内或表面上的是无源谐振电路，其以预选频率响应于入射电磁辐射，以产生和辐射指示令牌在入射场中的存在的唯一可检测信号。

2. 发明授权

US3810172A Detection system 失效
标题翻译：检测系统
公开(公告)号：US3810172A
公开(公告)日：1974-05-07
申请号：US27283172
申请日：1972-07-18
申请人： BURPEE L , PAYNTER D
发明人： BURPEE L , PAYNTER D
IPC分类号： G08B13/24 , G01S9/02
CPC分类号： G08B13/2414 , G08B13/2471 , G08B13/2474
摘要： A system for detecting the presence of resonant circuit targets in a field of electromagnetic radiation. The system includes means for generating a burst of a predetermined single frequency and a detector enabled after the termination of transmission. The detector is sensitive to continued presence of the predetermined frequency indicative of resonant ringing of a target in the field. Time sharing of a common transmitter and detector is accomplished employing a time division multiplex arrangement. Counterfeit target detection is also accomplished employing a test fixture with valid and invalid target indicators controlled by the system. In one embodiment, the antenna means is positioned in obstructions or doors which are moved aside by a person passing through the portal. This provides close coupling of energy and the system is provided with an enabling switch operated by displacement of the obstruction or door.
摘要翻译：一种用于检测电磁辐射场中谐振电路目标的存在的系统。该系统包括用于在传输结束之后产生预定单个频率的突发和启用的检测器的装置。检测器对于指示场中的目标的共振振铃的预定频率的持续存在敏感。使用时分复用布置来实现公共发射机和检测器的时间共享。

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