Maschinenfabrik Carl Zangs Aktiengesellschaft

Maschinenfabrik Karl Zangs Ag

Hans Conrads

Max Schafer

Hubert Hoven

Josef Hoffmans

Hans Hippel

Hans Rolaussf

An embroidery machine having a plurality of embroidery bars, particularly needle and piercer bars, which are mounted for axial displacement independently of each other and arranged in at least one row alongside of each other, which bars can be coupled individually with a reciprocating drive element in accordance with a program determined by a control. In order to be able to couple each individual embroidery bar with the drive element in accordance with any desired unlimited number of programs without having to stop the drive in order to change the program, each individual embroidery bar can be coupled with the drive element by the force of at least one magnet.

Embroidery machine

A method for the determination of the switching moments for special functions of automatic embroidery, straight-stitching-and sewing-machines with which the electrical signals which determine the switching moment are formed by logical switching operations in an electric or electronic control. The electrical signals fed to the control are produced by an angle coder (or a rotation pulse transmitter) which either is driven directly by the main drive shaft or indirectly by an auxiliary shaft; the angle coder delivers bit patterns, which bit patterns change constantly (or which pulse transmitter feeds pulses) from angle increment to angle increment of the main drive shaft (or which pulses are summed in a counter providing bit patterns at the output) and which bit patterns are compared in a logical switching operation control with other bit patterns representative of the different angular positions of the main drive shaft and being pre-programmed in the memory part of a memory/comparator; and upon bit pattern equality lead to the release of output signals for triggering of the special functions.

Method for the determination of the switching moments for special

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Tonisvorst, Germany

Hans Conrads