| 摘要 |
1,157,641. Selective signalling. MOORE REED (INDUSTRIAL) Ltd. 15 July, 1966 [28 July, 1965], No. 32250/65. Heading G4H. A shaft 64, Fig. 6, position digitizer includes a 10<SP>-3</SP> stage 61 in which brushes 0/9, 1/8, 2/7, 3/6, 4/5 and A, B, C, C o , C e and COM, Fig. 5, are moved over stationary conductive segments 53, 54, 55, and 10<SP>-2</SP> and 10-1 stages 62, 63 in which coded scales (e.g. as in Fig. 7, not shown, or as in Specification 1,135,204, which is referred to) are moved past stationary brushes, the arrangement being such that each stage produces a " choosing signal " which selects which brushes in the next higher stage are to be operative. The lowest denominational stage 61, Fig. 6, includes two brushes A, B, Fig. 5, whose outputs when suitably combined (Fig. 2, not shown) produce inverse signals a, b, Fig. 3a, which are used to energize the C e and C 0 brushes respectively, Fig. 5, so that each numbered brush (e.g. 0/9) produces a signal when in a position corresponding to either of its numbers, the ambiguity being resolved by reference to brush C. |
