| 摘要 |
An AC solenoid apparatus of the armature-in-tube type for operating valves such as hydraulic/air valves, or other machines. The apparatus comprises a solenoid having a sealingly closed part including a pressure proof tube preferably made from a thin nonmagnetic material, and an exciting assembly having a coil encompassing the closed part and a yoke having a generally rectangular cross section. A slotted annular magnetic ring made from a magnetic material is inserted between the pressure proof tube and at least one part of the yoke. The solenoid of this invention is small in size and of low cost, and yet is endowed with a high force and a capability of restraining heat by being generated from the solenoid. |
