Fundamental Concepts in the Design of the Flying Spot Store

1.1 Application in Electronic Switching Systems The flying spot store has been developed to meet the needs in electronic telephone switching systems for high capacity semipermanent memory arranged for rapid random access to stored words. In its present form the flying spot store meets all the requirements of the system described elsewhere in this issue.1 The original suggestion for the use of a flying spot store was made by C. E. Brooks, leading to the development described in this paper. Electronic switching systems of the future will also require memory of this type. Directory-to-equipment number translations alone will require millions of bits. In the form now under development, the flying spot store appears capable of meeting the memory requirements of these large systems. 1.2 Form of the Flying Spot Store In the flying spot store information is stored as a pattern of transparent and opaque spots on developed photographic emulsion. Access 1161 1 1 6 2 T I I E H E L L SYSTEM T E C H N I C A L J O U R N A L , S E P T E M B E R