Patent ID: 7481126
Filing Date: 2009-01-27
Classification: F16H,Y10T

Abstract:
1. In a precision table comprising a base, a table moveable relative to said base, and means operatively connected to said table for moving same which comprises a lead screw, a nut on said screw moveable therealong as said screw is rotated, and a part operatively connected between said nut and said table, the improvement which comprises a support for one end of said screw, said support comprising a bearing in which said one end of said screw is operatively rotatably received and from which said screw extends, a tube mounted on and extending from said support and surrounding said screw, said tube having an opening through which said part extends from said nut to said table and along which said part can move as said nut moves along said screw, and a second bearing in said tube remote from said first bearing in which the other end of said screw is operatively rotatably received, in which said part is secured to said nut and extends toward said table, in combination with a member operatively connected to said table against which said part is adapted to abut, said member comprising a pair of spaced abutments between which said part is adapted to be received, and resilient means active on said part to urge it against said member, further comprising means in said tube beyond said second bearing for exerting pressure on said second bearing toward said first bearing, thereby to reduce play in one or both of said bearings.