Electromagnetic stepping drive for a geared wheel mechanical counter that has coils formed on a stator that is set into a disc rotor

摘要

The counter has a number of wheels (6) that each have a gear wheel (7) engaged by a lug (8) and coupled by pinions (10) to give the decade interconnection. The input is in the form of step actions provided by an electromagnetic drive. This has coils (3) on a stator (2) and interacts with a permanent magnet disc (4).