| 摘要 |
1,207,628. Traffic control systems. E. W. BLISS CO. 11 Dec., 1967 [24 March, 1967], No. 60042/68. Divided out of 1,207,625. Heading G4Q. The Specification contains the same subject matter as that of Specification 1,207,625, but the claims are for a traffic control apparatus having means for providing signals representing a characteristic of the traffic in two directions, means for multiplying one signal with a reference ratio and comparing the result with the other signal, and bi-stable means normally connecting the result to one output but changing over to a different output when the multiplied first signal exceeds the second signal. |
