Magnetised ring for the protection of speed detection devices.

摘要

A magnetised ring (17) for retaining ferrous particles for the protection of devices (13,14) for detecting the speed of rotation between two relatively rotatable members (10,11); the ring (17) is mounted on the same ring as carries the said detection device (13,14), outside and close to the chamber (19) in which the detection device (13,14) is contained.