Carl-zeiss-stiftung

Peter Ahnelt

Kurt Brenner

Karl Seitz

Roland Roth

Eckhard Enderle

Walter Dominicus

The invention is directed to a collision protective arrangement for a measuring arm of a coordinate measuring apparatus for measuring a workpiece. The measuring arm has a surface facing toward the workpiece. The collision protective arrangement includes a part for covering and protecting the surface; and, a circuit switchable between a first electrical state wherein no contact is present between the part and the workpiece and a second electrical state indicative of a collision between the workpiece and the part. The surface of the measuring arm and the part conjointly define an interface and the circuit includes a plurality of resiliently-biased contact pins and contacts mounted at the interface to coact to switch the circuit into the second electrical state when the collision takes place.

Collision protective arrangement for the measuring arm of a coordinate

The invention is directed to a probe head of a coordinate measuring apparatus for conducting measurements on a workpiece. The probe head has a first longitudinal axis and has a probe pin mounted on the probe head. The probe pin has a second longitudinal axis defining an angle with the first longitudinal axis. A joint-free, rigidly-configured adjusting device adjusts this angle when the probe pin is not in contact with the workpiece.

Probe head of a coordinate measuring apparatus

A load-compensating gas bearing which exhibits high total rigidity over a large range of loads. The bearing consists of a deformable disk (3) that is supported by, but is not fixed to, a circular support (6) that is rigidly mounted to a base element connected with the machine part (1) being supported by the bearing. The disk (3) is held and centered only by a cylindrical insert (5) that is also used to supply the supporting gas to the bearing span. The bearing side of the deformable disk is provided with a hard plastic coating for protection in the event the gas supply is discontinued; and in one preferred embodiment, the circular support (6) is mounted to a base element that is integral with the machine part being supported.

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Oberkochen, Germany

Peter Ahnelt