| 摘要 |
<p>1,110,205. Road traffic signals. SIEMENS A.G. 13 April, 1966 [13 April, 1965], No. 16111/66. Heading G4Q. Two sets of signal lights Sg 1-2 and Sg 3-4 at different road junctions are controlled from programmes stored in a store Hs p1 by counting one-second pulses from a generator Tg and changing the lights when the count corresponds to a stored count. The generator Tg feeds a 40 kc./s. generator Ge which, through a distributer Tv and address register Ar1, samples all the storage cells. Fig. 3 shows one form of store comprising four sets of cells, two for each set of signal lights; the active cells have L in the last column and the inactive ones O. The signal cells (e.g. z2) contain a code S in the first column, the times at which changes are required in the second and third columns, a code (e.g. A) in the fourth column controlling a corresponding contact (a) in unit Sch, Fig. 2, thereby selecting the appropriate signal (Sg1). The time storage cells (e.g. zl) contain a code zz in the first column, the time in the second column, which is advanced by one each sampling cycle, and the length of the signal cycle in the third column. The second column is connected by line V8 to a time store ZSp, Fig. 2 and the second and third columns are connected to a comparator Vg1 which detects coincidence and resets the second column and the store ZSp at the end of a cycle via line V9. Coincidence units Vg2 and Vg3 detect coincidence between the time store ZSp and the times at which the signals should change (supplied on lines V8 and V10 from the second and third columns of the signal stores) and energize lines V15 and V16 thereby changing over the appropriate bi-stable switch T1-T4 selected by the fourth column of a signal store via lines V1 and V12, address register Ar3, and contacts a to d. The store is provided with an input device E and address register Ar 2. The input may be derived from punched cards or the like, a teleprinter, or a data-processing installation responsive to traffic data. In an alternative form of main store, Fig. 4 (not shown), each storage cell is provided with a final column giving the address of the next cell to be sampled. There are twenty time storage cells (Z1-Z20) and 180 signal storage cells (Z21-Z200).</p> |
