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1. 发明授权

US4313105A Encoding switches 失效
标题翻译：编码开关
公开(公告)号：US4313105A
公开(公告)日：1982-01-26
申请号：US94240
申请日：1979-11-14
申请人： Manickam Ananthan , William J. Herring , Thomas D. Williams , Peter B. Page
发明人： Manickam Ananthan , William J. Herring , Thomas D. Williams , Peter B. Page
IPC分类号： G01D5/25 , H01H19/58 , H03M1/00 , H01H67/08
CPC分类号： H01H19/585 , G01D5/25 , H03M1/26
摘要： Where switches are used for encoding decimal digits into binary words for use in processing devices in, for example, postal franking machines where security is essential, failure modes that produce normal codes not corresponding to the input decimal digits have to be detected. The switch described reduces the number of failure modes which the processor cannot recognize as errors in that it produces two 1-out-of-5 coded words for each decimal digit to enable a processing device to test whether each word in fact contains only one "1" (or "0") and then to combine the two words to produce a 2-out-of-5 word corresponding to the selected decimal digit. The switch comprises five contact elements A to E each comprising inner and outer arcuate portions 10, 11 concentric with common rings 13, 14. A rotatable part having ten positions 0 to 9 can be set in any one of those positions to select a decimal digit, and comprises connected contacts for bridging an inner arcuate portion 10 and ring 13 as well as, at a diametrically opposite point, an outer arcuate portion 11 and ring 14. When the rotatable part has been set, the two corresponding 1-out-of-5 codes are signalled by scanning in sequence the common rings and reading the five contact elements A to E.
摘要翻译：在将开关用于将十进制数字编码为二进制字以用于例如在必要的安全性的邮政盖印机中的处理装置中的情况下，必须检测产生不对应于输入的十进制数字的正常代码的故障模式。描述的开关减少了处理器不能识别为故障的故障模式的数量，因为它为每个十进制数字产生两个1-out-of-5编码字，以使处理装置能够测试每个字实际上是否仅包含一个“ 1“（或”0“），然后组合两个字以产生对应于所选十进制数字的2-of-5字。开关包括五个接触元件A至E，每个接触元件A至E各自包括与公共环13,14同心的内部和外部弓形部分10,11。具有十个位置0至9的可旋转部分可以设置在这些位置中的任何一个中，以选择十进制数字并且包括用于桥接内弧形部分10和环13以及在直径相对的点处的外弧形部分11和环14的连接的触点。当可旋转部分已经被设定时，两个对应的1-out -5代码通过顺序扫描公共环并读取五个接触元件A到E发信号。

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