Method for determining the contact angle (α) of a rolling element bearing (10) comprising an inner ring (12), an outer ring (14) and a plurality, P, of rolling elements (16) interposed between the inner ring (12) and the outer ring (14). The method comprises the step of determining the relative speed of P−1 or fewer of said plurality, P, of rolling elements (16) with respect to the inner ring (12) and/or the outer ring (14) and determining the contact angle (α) of said rolling element bearing (10) therefrom.

The present invention relates to an apparatus, system, and method of using the same for connecting and spacing grating and the like. Specifically, the present invention relates to connecting and spacing wire gratings, for example wire gratings used as vehicle tire support material or for mounting wheel chocks thereon in the transportation of automobiles. Even more specifically, the present invention may be used to connect a plurality of wire gratings together and to space in a first direction the plurality of gratings apart from each other at multiple selectable distances in one configuration. In a second configuration, the present invention may be used to space in a second direction the plurality of gratings from other objects, such as a wall or guard rail. The second configuration may be used in multiple orientations in order to provide multiple different spacing distances.

Systems are disclosed for the combined measurement of linear and angular displacements, with high sensitivity, wide measurement band at low frequency based on the configuration of the folded pendulum, and a linear and angular displacement sensor for applications of monitoring and control. Examples of possible applications of the combined sensor subject-matter of the present invention are sensor for the seismic monitoring, sensor for systems of monitoring and/or control of civil and industrial buildings, dykes, bridges, tunnels, etc., sensor for system of monitoring and/or control for the realization of systems of seismic attenuation and inertial platforms.

A device for inspecting a profiled work pieces has a toothing, the profile metrologically detectable by the probe element of a profile probe. The profile and the profile probe are moved relative to one another and at right angles or tangentially to the measuring plane of the profile probe. The device measures work pieces having different numbers of teeth, modules and widths, directly after processing, on site and quickly, for accuracy and deviations, without special profiles for the toothing. The probe element of the profile probe can be applied to the profile of the work piece, can be applied to the profile edge of the work piece that is moving away from the probe element by the probe radius of the probe element, and subsequently, by the lateral surface of the probe element facing the profile edge opposite thereof, is configured so the probe element can be displaced from the profile gap.

A device for inspecting a profiled work pieces has a toothing, the profile metrologically detectable by the probe element of a profile probe. The profile and the profile probe are moved relative to one another and at right angles or tangentially to the measuring plane of the profile probe. The device measures work pieces having different numbers of teeth, modules and widths, directly after processing, on site and quickly, for accuracy and deviations, without special profiles for the toothing. The probe element of the profile probe can be applied to the profile of the work piece, can be applied to the profile edge of the work piece that is moving away from the probe element by the probe radius of the probe element, and subsequently, by the lateral surface of the probe element facing the profile edge opposite thereof, is configured so the probe element can be displaced from the profile gap.

A test body is provided for determining one or more rotation errors of a rotating apparatus with respect to one or more degrees of freedom of movement, in which a real rotating movement of the rotating apparatus differs from an ideal rotating movement. The test body includes a holder which, together with a part of the rotating apparatus, can be rotated about an axis of rotation. The holder can be configured to arrange or fasten the test body with respect to the axis of rotation about which the test body can be rotated for the purpose of determining the rotation error(s). One or more test elements are rigidly connected to the holder or are formed on the holder, and each of the test elements is used to determine a rotation error with respect to one or more of the degrees of freedom of movement.

A test body is provided for determining one or more rotation errors of a rotating apparatus with respect to one or more degrees of freedom of movement, in which a real rotating movement of the rotating apparatus differs from an ideal rotating movement. The test body includes a holder which, together with a part of the rotating apparatus, can be rotated about an axis of rotation. The holder can be configured to arrange or fasten the test body with respect to the axis of rotation about which the test body can be rotated for the purpose of determining the rotation error(s). One or more test elements are rigidly connected to the holder or are formed on the holder, and each of the test elements is used to determine a rotation error with respect to one or more of the degrees of freedom of movement.

An angle wrench has a simple structure and is capable of accurately measuring rotation angle. The angle wrench is used for tightening an object to be tightened by means of the rotation angle method, and includes a handle having a grip; a head section having a tightening head for tightening the object to be tightened, and a tail section that extends from the tightening head pivotally supported with respect to the handle via a head pin; torque-detecting mechanisms for detecting when the torque for tightening the object being tightened reaches the specified torque; and a rotation angle-measuring section for measuring the rotation angle of the angle wrench in a tightening action, on the basis of the angular velocity of the angle wrench around the axis of the object being tightened, after the torque-detecting mechanism has detected that the specified torque has been reached.

An angle wrench has a simple structure and is capable of accurately measuring rotation angle. The angle wrench is used for tightening an object to be tightened by means of the rotation angle method, and includes a handle having a grip; a head section having a tightening head for tightening the object to be tightened, and a tail section that extends from the tightening head pivotally supported with respect to the handle via a head pin; torque-detecting mechanisms for detecting when the torque for tightening the object being tightened reaches the specified torque; and a rotation angle-measuring section for measuring the rotation angle of the angle wrench in a tightening action, on the basis of the angular velocity of the angle wrench around the axis of the object being tightened, after the torque-detecting mechanism has detected that the specified torque has been reached.

An image forming apparatus includes a main assembly including an image forming portion; a rotatable member capable of feeding a sheet and configured to rotate; and a detecting unit including an interrelating member configured to rotate in interrelation with rotation of the rotatable member, a detecting member configured to detect rotation of the interrelating member, and a holding member configured to integrally hold the interrelating member and the detecting member. The interrelating member, the detecting member and the holding member are integrally assembled into a unit. The detecting unit is detachably mountable to the main assembly.