The USE OF LINKS AND ROLES ON A PRE‐CO‐ORDINATION BASIS IN OPTICAL COINCIDENCE SYSTEMS Available to Purchase

Links and roles have been judged to be of doubtful value, but it is agreed that the devices substantially reduce noise. These devices have been employed on a pre‐co‐ordination basis in an optical coincidence system, without any of the concomitant difficulties of comprehensive usage. The devices are closely related to the generic structure of the system described.