首页>
外国专利>
Punched card system for coding numbers - has perforation positions arranged as grid to punch characteristic patterns which may be sensed by appropriate equipment
Punched card system for coding numbers - has perforation positions arranged as grid to punch characteristic patterns which may be sensed by appropriate equipment
展开▼
机译:用于打码的打孔卡系统-具有排列为网格的打孔位置,以打孔特征图案,可通过适当的设备进行感应
展开▼
页面导航
摘要
著录项
相似文献
摘要
A punched card is used esp. for specifying which resonators of a responder in a microwave railway control system are to be activated. The system permits an observer to check easily from visual observation of the card, what code number it represents. The card is provided with an orthogonal grid of perforations (P) separated by intermediate zones (Z) which are marked off by boundary lines. The perforations may be pre-prepared by crossed slits to facilitate manual marking by a blunt tool to produce a characteristic pattern representing a given code.
展开▼