X-ray inspection device and method Patent #: 4020346
ApplicationNo. 05/945097 filed on 09/22/1978
US Classes:378/57, Inspection of closed container250/358.1, With means to inspect passive solid objects250/515.1, Shields318/135, LINEAR-MOVEMENT MOTORS378/117For safety or protection
ExaminersPrimary: Smith, Alfred E.
Assistant: Howell, Daniel W.
Attorney, Agent or Firm
International ClassesG01N 23/02 (20060101)
G01N 23/04 (20060101)
Foreign Application Priority Data1975-11-03 DE
AbstractAn apparatus for inspecting or screening articles, such as closed luggage and parcels, having a moveable shield to enclose selectively a monitoring duct area in which the articles are placed for screening by X-ray or similar radiation. The shield moves in a fixed housing (which may in turn be mobile) on wheels. A linear drive motor has a stator fixed in the bottom of the housing. The shield carries a rail electromagnetically reactable directly with the stator. Proximity switches in the housing activated by a magnet on the shield control the travel of the shield. A switch located between the end of travel switches may be employed to vary the speed of the linear motor to provide quick, safe cycling of the apparatus.