公开(公告)号：US3710120A

公开(公告)日：1973-01-09

申请号：US3710120D

申请日：1970-10-28

Applicant: BECKMAN INSTRUMENTS INC

Inventor： ROBINSON D

IPC: G01R7/08 ,  G01T7/08 ,  G01T1/20

CPC classification number: G01R7/08 ,  G01T7/08 ,  Y10T74/18056 ,  Y10T74/1828

Abstract: A sample changing and light sealing mechanism is illustrated and described for moving a sample from one vertical plane to another into a counting chamber while maintaining the light integrity within the chamber. Upon movement of the control arm toward a loading position, a cam on said control arm rotates an actuator wheel and arm to raise the elevator table from a counting position to within an elevator passageway and make a light tight seal at the chamber end of the passageway. The actuator wheel is stopped during further movement of the control arm which then opens an outer shutter over the passageway. The actuator wheel is then again rotated to raise the elevator still further so that the sample may be removed and replaced. Movement in the opposite direction reverses the sequence such that the chamber is at all times sealed against ambient light.

Abstract translation: 示出和描述了样品改变和光密封机构，用于将样品从一个垂直平面移动到另一个垂直平面进入计数室，同时保持室内的光完整性。 当控制臂朝向装载位置移动时，所述控制臂上的凸轮使致动器轮和臂旋转，以将升降台从计数位置升高到电梯通道内，并在通道的腔室端部进行不透光的密封 。 执行器轮在控制臂的进一步运动期间停止，其然后在通道上打开外快门。 然后再次旋转致动器轮以进一步升高电梯，使得样品可以被移除和更换。 相反方向的运动反转了序列，使得室始终被密封抵抗环境光。