Aktiengesellschaft Adolf Saurer

Roland Heimgartner

Kurt Huber

Hans Wallimann

Georg Comploi

Artur Loacker

A positioning device for a mechanical switching lever arrangement in an embroidery machine comprises an electromagnetic device which serves for displacing a pawl lever between a first end position and an intermediate position. The pawl lever serves for actuating a switching lever arrangement. The positioning device further comprises a mechanical amplifier device for displacing the pawl lever between the aforementioned intermediate position and a second end position. At its free end region the pawl lever carries a permanent magnet which continuously adheres to the electromagnet when the same is deenergized. The mechanical amplifier device, which cooperates with the pawl lever, comprises an externally actuatable switching lever arrangement. By pivoting this switching lever arrangement the pawl lever can be displaced from its intermediate position to the second end position and vice versa. In this way there can be initiated, at first, a displacement operation, by means of a relatively small arrangement of magnets, whereupon the actual positioning or adjustment work is carried out exclusively by means of the mechanical amplifier.

Electromagnetic pattern selector for an embroidery machine

At an embroidery machine there are mounted and displaceably guided two rows of embroidering implement rods which can be connected so as to be operatively coupled or decoupled in accordance with a desired program to a related one of two operatively associated oscillating drive rails. The embroidering implement rods which are related to the same embroidery location or position and which are, for instance, arranged in superimposed relation, can be simultaneously coupled to or decoupled from the operatively associated drive rail by means of a common switching lever. This switching lever can be actuated either directly or manually by means of adjustment levers and automatically by means of an electromagnetic device. This individual switching of all implements of an embroidery location enables easily adjusting any desired combination of working and inactive embroidery locations.

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Arbon, Switzerland

Roland Heimgartner