Siemens Aktiengesellschaft

Siemens Aktiengesell Schaft

Asm Assembly Systems Gmbh & Co. Kg

Walter Andersch

Rudolf Schuster

The present invention is directed to a coil unit of a single-acting linear engine. The coil unit includes an iron core with coils that are linked with the iron core by way of a cast compound thereby forming a molded part. The molded part is enclosed by a housing having a narrow circumferential gap formed between the housing and the molded part. Through the gap, cooling air may flow or be blasted. The air extensively cools the iron core with the coils and thermally insulates the housing from the iron core and the coils.

Air-cooled coil unit of a linear motor

The invention relates to a device for interchanging suction pipettes which can be removed from a magazine and coupled to a fitting head of a fitting device and detached from the fitting head and deposited in the magazine. The fitting head has, on its side facing the magazine, a motor on whose driven shaft a star-shaped part and a latching plate are mounted. The latching plate has at least one nub ( ) which, after insertion of the star-shaped part into a star-shaped cutout in the suction pipette held in the magazine and after rotation of the star-shaped part and the latching plate into a locking position, engages in a notch, and which, on insertion of a suction pipette held on the star-shaped part into the magazine, can be moved out of the notch. The magazine has, on the side facing the fitting head, a sliding ring which is arranged in a rotationally fixed manner in the magazine and into which the suction pipette can be inserted in such a manner that the star-shaped latching plate comes to rest with its outer edges on the sliding ring where it is raised resiliently away from the star-shaped part, so that the nub is situated above that surface of the suction pipette which faces the fitting head.

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Kirchheim, Germany

Walter Andersch