Patent ID: 7111413
Filing Date: 2006-09-26
Classification: G01B

Abstract:
1. A precision distance measming instrument comprising: a housing defining a measuring axis, a measuring spindle disposed rotatably and shiftably in the housing in such a manner that a certain rotary motion of the measuring spindle results in a corresponding shift of the measuring spindle along the measuring axis, a sensor device for detecting the rotary motion of the measuring spindle; the sensor device has a stationary sensor element which is immobile relative to the housing and a movable sensor element which is connected to the measuring spindle to rotate therewith and which is shiftable relative to the measuring spindle along the measuring axis; between the stationary sensor element and the movable sensor element a clearance of predetermined width is set, and a guiding device for guiding the relative shifting motion between the movable sensor element and the measuring spindle; the guiding device includes a guiding sleeve connected to the movable sensor element for rotation therewith; the guiding sleeve has an inner groove which extends parallel to the measuring axis and a guiding member which is connected to the measuring spindle for rotation therewith and which projects shiftably into the inner groove.