Aktiengesellschaft Adolph Saurer

Adolph Saurer Ag

Armin Kobler

Max Schreiber

Hans Wallimann

Ernst Kuhnis

Kurt Huber

Peter Josuran

The embroidery machine encompasses a large number of embroidery locations equipped with displaceably guided embroidery needles for the embroidery threads. These embroidery threads partially wrap about adjacently situated, conjointly to-and-fro oscillating thread guides of a thread delivery device in order to respectively accomplish the thread advance and thread retraction. At the region of the thread guides there is arranged a thread guide and clamping device comprising adjacently mounted guide elements located in a row upon a machine-fixed holder rail. These guide elements correspond in number to the number of embroidery locations and are constructed for guiding the threads, for clamping of the threads and for the cutting of the threads. With this arrangement there can be constructed or retrofitted, respectively, an embroidery machine of the aforementioned type such that there can be simply undertaken and with a good visual overview of the embroidery machine the guiding including the threading-in of the threads into the relevant guide elements, the clamping and severing of the thread ends of threads which do not participate in the embroidery operation, in other words are at standstill, and the non-participating threads can be optimally prepared for accomplishing a subsequent color or repeat change.

Embroidery machine equipped with thread guide and clamping device

The borer apparatus for an embroidering machine comprises a device for removably mounting an exchangeable borer implement on a borer support. The exchangeable borer implement is secured against rotation and is axially fixed by a pivotable hairpin spring which facilitates the replacement of the exchangeable borer implement. The exchangeable borer implement is inserted with its shaft into a sliding or close fitting bore in the borer support and a stop member in the close fitting bore engages an end or head groove of the shaft of the exchangeable borer implement. The shaft is subjected to the action of the hairpin spring in order to secure such shaft against inadvertent rotation. The stop member in the close fitting bore is formed by a pin or sleeve which penetrates and protrudes out of at least one side of the borer support and whose free end forms a biasing stop for the free end of the outwardly pivotably positioned hairpin spring which fixes the exchangeable borer implement in an axial direction. The hairpin spring has a clamping shank which engages a contact surface on the shaft of the exchangeable borer implement. The contact surface extends vertically in relation to the longitudinal roll axis of the exchangeable borer implement.

Borer apparatus for an embroidering machine

A freely rotatably mounted roll body couplingly engageable with a brake shaft comprises an exchangeable thread brake liner. The rotatable roll body carrying the thread brake liner in a groove is exchangeably mounted between stationary guide discs which extend radially beyond the roll body on both sides and form a radial continuation of walls of the roll body, laterally defining a thread groove with their radially protruding portions and between which the roll body is exchangeably arranged.

Thread-guiding roll

The needle thread-break monitor for embroidery machines comprises a double-armed rocking lever acting as a switch in an electrical circuit of an alarm system. The rocking lever is mounted on a bearing shaft forming one pole or terminal of the switch. The other pole or terminal of the switch is formed by a limit or abutment shaft arranged substantially vertically above and extending substantially parallel to the bearing shaft. The arm of the rocking lever not having a thread guide cooperates with the limit shaft, which carries a sleeve of electrically insulating material forming a stop limiting the open position of the switch. The arm of the rocking lever having a thread guide cooperates with the sleeve. The sleeve is rotatable between a terminal or limit position on the terminal or limit shaft enabling electrical contact and another limit position inhibiting electrical contact. The sleeve serves as a support for a needle thread in the relaxed or non-tensioned state. These measures permit the design of a simple yet reliable needle thread-break monitor which fulfills all requirements.

Needle thread-break monitor for embroidery machines

The needle of an individual embroidery location of a multitude or row of linearly arranged embroidery locations in an embroidery machine is mounted at an axially displaceably guided needle carrier. According to a programmed control and by means of a related switching lever the needle can be individually coupled to or decoupled from an oscillating drive rail which is common to all the needles of the row. A thread guiding roller which is journaled for free rotation at a roller supporting lever and associated with a related one of the needles supplies a thread to the related needle. Simultaneously with the coupling or decoupling of the needle to the oscillating drive rail the roller supporting lever is pivoted between an operative position and an inoperative position in which the thread guiding roller is respectively coupled to or decoupled from a braking member which is common to all embroidery locations. The driving connection arrangement between the thread guiding roller and the common braking member is designed to act in the manner of a reducing gear, so that a rotary movement of the thread guiding roller causes a significantly less extensive rotary movement of the common braking member. The pivoting of the roller supporting lever is effected via a connecting member which may constitute a cord or a wire and which is connected to the switching lever which activates or deactivates the related embroidery location.

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Oberriet, Switzerland

Armin Kobler