Micrometer screw adjuster for sights on sporting guns has sprung ball or pusher mechanism to modify movement

摘要

The adjuster incorporates a mechanism to modify the sight regulating regulating movements, comprising a number of spring-loaded balls (4) or pushers in precise angular positions to engage with indexing notches in a drum (1) or support (2). The number of balls or pushers employed varies the number of indexing points for each revolution of the screw (5), and drums with different numbers of notches can be fitted.