Revolution counter comprises has radial magnets on pivoted magnetisable stubs to form a magnetic circuit with a ring and coil cores so that passage of the gaps between segments creates a voltage impulse in the coils

摘要

A revolution counter has radial magnets (5) on pivoted magnetisable stubs (9) to form a magnetic circuit with a ring (8) and coil (16-18) cores so that passage of the gaps (22) between segments creates a voltage impulse in the coils.