发明名称 |
Passer counter |
摘要 |
A device for counting the number of persons entering or exiting a given area including a mat switch having a plurality of normally open independent switches arranged in the form of a ladder and a plurality of resistors each connected to one of the plurality of switches, the switches and the resistors configured such that the output resistance of the mat switch undergoes a monotonic reduction as the switches are successively closed by the pressure of a person's foot as the person to be counted moves in a predetermined direction across the mat switch and a means for converting the change in the output resistance of the mat switch into a signal which is counted.
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申请公布号 |
US4122331(A) |
申请公布日期 |
1978.10.24 |
申请号 |
US19770802568 |
申请日期 |
1977.06.01 |
申请人 |
GIKEN TRADING COMPANY |
发明人 |
TSUBOTA, NAOKI;SATORU, SHIBUYA |
分类号 |
G07C9/00;(IPC1-7):G07C9/00 |
主分类号 |
G07C9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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