公开(公告)号：US3834243A

公开(公告)日：1974-09-10

申请号：US33672673

申请日：1973-02-28

Applicant: BECKMAN INSTRUMENTS INC

Inventor： BURKE R

IPC: G01N21/00 ,  G05D3/12 ,  F16H55/04

CPC classification number: G05D3/12 ,  Y10T74/1812 ,  Y10T74/19879

Abstract: Apparatus for slidably positioning a sample tray biased in a first direction by restoring means, the sample tray being coupled to a rack member coacting with a small motor driven gear for driving the sample tray in a direction opposite to the first direction, the small gear being coupled to a large gear having a plurality of position determining protruding fingers engaging a pawl member. The pawl member is configured for limited pivotal movement about an axis, the pawl having a pocket configured in one end thereof for sequentially engaging the protuding fingers, while the other end of said pawl has a shoulder portion engaging a solenoid actuated stop lever for selectively determining the engagement of the pocket with a predetermined protruding finger. Mechanically coupled to the sample tray is a piston engaging a fixed cylinder, the sample tray being initially motor driven to the extreme limit of its first direction with the solenoid energized to permit pivoting of the pawl member, the sample tray then being precisely positioned in the opposite direction to one or more selected positions under action of selective energization of the stop lever, under the force of the restoring means, the speed of return being controlled by the piston and cylinder. Limit switches are provided for selective sequential control.

Abstract translation: 用于通过恢复装置可滑动地定位沿第一方向偏移的样品托盘的装置，所述样品托盘联接到与小马达驱动齿轮共同作用的齿条构件，用于沿与第一方向相反的方向驱动样品托盘，小齿轮 联接到具有多个位置的大齿轮，所述多个位置确定突出的指状物接合棘爪构件。 棘爪构件被构造成围绕轴线进行有限的枢转运动，棘爪具有在其一端中构造的袋，用于顺序地接合突出指，而所述棘爪的另一端具有接合螺线管致动的止动杆的肩部，用于选择性地确定 口袋与预定的伸出的手指接合。 机械地联接到样品托盘的是活塞，其与固定的圆筒接合，样品托盘最初被马达驱动到其第一方向的极限，螺线管通电以允许棘爪构件的枢转，然后将样品托盘精确定位在 在恢复装置的力作用下，在停止杆的选择性激励的作用下，与一个或多个选定位置相反的方向，返回速度由活塞和气缸控制。 限位开关用于选择性顺序控制。