Patent ID: 6735269
Filing Date: 2004-05-11
Classification: G01D,G01P

Abstract:
A revolution counter; comprising:a base body; a rotary element intended for connection to a revolving member and rotating relative to the base body about a rotation axis; a reference element intended for connection to the base body for providing a reference for the revolving element; a sensor arrangement accommodated in the base body; a power supply device disposed on the base body for supply of energy to the sensor arrangement; a magnet arrangement disposed on the rotary element and so interacting with the power supply device that the sensor arrangement is supplied with energy during each revolution of the rotary element in at least three rotary positions of the rotary element regardless of a rotation speed of the rotary element to thereby allow the sensor arrangement to ascertain a rotary position of the rotary element; wherein the rotary element is positioned with respect to the base body in a manner selected from the group consisting of without connection to the base body, and held by the base body at three-dimensional play, to thereby prevent a transmission of mechanical forces from the rotary element onto the base body, when the rotary element is connected with the revolving member and the base body is connected with the reference member.