SOLENOID WITH MAGNETIC CONTROL OF ARMATURE VELOCITY

摘要

A low-noise solenoid has an armature (15) with a projecting ridge (23) receivable within a groove (25) in a pole piece (17). As the ridge (23) enters the groove (25), the magnetic force which opposes a return spring (21) decreases until there is equilibrium whereat the armature (15) remains suspended without impacting upon the pole piece (17).